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/* gb.h - v0.10c - Ginger Bill's C Helper Library - public domain
- no warranty implied; use at your own risk
This is a single header file with a bunch of useful stuff
to replace the C/C++ standard library
===========================================================================
YOU MUST
#define GB_IMPLEMENTATION
in EXACTLY _one_ C or C++ file that includes this header, BEFORE the
include like this:
#define GB_IMPLEMENTATION
#include "gb.h"
All other files should just #include "gb.h" without #define
===========================================================================
Conventions used:
gbTypesAreLikeThis (None core types)
gb_functions_and_variables_like_this
Prefer C90 Comments
Never use _t suffix for types (I think they are stupid...)
Version History:
0.10c - Fix gb_endian_swap32()
0.10b - Probable timing bug for gb_time_now()
0.10a - Work on multiple compilers
0.10 - Scratch Memory Allocator
0.09a - Faster Mutex and the Free List is slightly improved
0.09 - Basic Virtual Memory System and Dreadful Free List allocator
0.08a - Fix *_appendv bug
0.08 - Huge Overhaul!
0.07a - Fix alignment in gb_heap_allocator_proc
0.07 - Hash Table and Hashing Functions
0.06c - Better Documentation
0.06b - OS X Support
0.06a - Linux Support
0.06 - Windows GCC Support and MSVC x86 Support
0.05b - Formatting
0.05a - Minor function name changes
0.05 - Radix Sort for unsigned integers (TODO: Other primitives)
0.04 - Better UTF support and search/sort procs
0.03 - Completely change procedure naming convention
0.02a - Bug fixes
0.02 - Change naming convention and gbArray(Type)
0.01 - Initial Version
LICENSE
This software is dual-licensed to the public domain and under the following
license: you are granted a perpetual, irrevocable license to copy, modify,
publish, and distribute this file as you see fit.
WARNING
- This library is _slightly_ experimental and features may not work as expected.
- This also means that many functions are not documented.
CREDITS
Written by Ginger Bill
*/
#ifndef GB_INCLUDE_GB_H
#define GB_INCLUDE_GB_H
#if defined(__cplusplus)
extern "C" {
#endif
#ifndef GB_EXTERN
#if defined(__cplusplus)
#define GB_EXTERN extern "C"
#else
#define GB_EXTERN extern
#endif
#endif
#ifndef GB_DLL_EXPORT
#define GB_DLL_EXPORT GB_EXTERN __declspec(dllexport)
#endif
#ifndef GB_DLL_IMPORT
#define GB_DLL_IMPORT GB_EXTERN __declspec(dllimport)
#endif
/* NOTE(bill): Redefine for DLL, etc. */
#ifndef GB_DEF
#ifdef GB_STATIC
#define GB_DEF static
#else
#define GB_DEF extern
#endif
#endif
#if defined(_WIN32) || defined(_WIN64)
#if defined(_WIN64)
#ifndef GB_ARCH_64_BIT
#define GB_ARCH_64_BIT 1
#endif
#else
#ifndef GB_ARCH_32_BIT
#define GB_ARCH_32_BIT 1
#endif
#endif
#endif
/* TODO(bill): Check if this works on clang */
#if defined(__GNUC__)
#if defined(__x86_64__) || defined(__ppc64__)
#ifndef GB_ARCH_64_BIT
#define GB_ARCH_64_BIT 1
#endif
#else
#ifndef GB_ARCH_32_BIT
#define GB_ARCH_32_BIT 1
#endif
#endif
#endif
#ifndef GB_EDIAN_ORDER
#define GB_EDIAN_ORDER
#define GB_IS_BIG_EDIAN (!*(u8*)&(u16){1})
#define GB_IS_LITTLE_EDIAN (!GB_IS_BIG_EDIAN)
#endif
#if defined(_WIN32) || defined(_WIN64)
#ifndef GB_SYSTEM_WINDOWS
#define GB_SYSTEM_WINDOWS 1
#endif
#elif defined(__APPLE__) && defined(__MACH__)
#ifndef GB_SYSTEM_OSX
#define GB_SYSTEM_OSX 1
#endif
#elif defined(__unix__)
#ifndef GB_SYSTEM_UNIX
#define GB_SYSTEM_UNIX 1
#endif
#if defined(__linux__)
#ifndef GB_SYSTEM_LINUX
#define GB_SYSTEM_LINUX 1
#endif
#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
#ifndef GB_SYSTEM_FREEBSD
#define GB_SYSTEM_FREEBSD 1
#endif
#else
#error This UNIX operating system is not supported
#endif
#else
#error This operating system is not supported
#endif
#ifndef GB_STATIC_ASSERT
#define GB_STATIC_ASSERT3(cond, msg) typedef char static_assertion_##msg[(!!(cond))*2-1]
/* NOTE(bill): Token pasting madness!! */
#define GB_STATIC_ASSERT2(cond, line) GB_STATIC_ASSERT3(cond, static_assertion_at_line_##line)
#define GB_STATIC_ASSERT1(cond, line) GB_STATIC_ASSERT2(cond, line)
#define GB_STATIC_ASSERT(cond) GB_STATIC_ASSERT1(cond, __LINE__)
#endif
/***************************************************************
*
* Headers
*
*/
#if defined(_WIN32) && !defined(__MINGW32__)
#ifndef _CRT_SECURE_NO_WARNINGS
#define _CRT_SECURE_NO_WARNINGS
#endif
#endif
/* TODO(bill): How many of these headers do I really need? */
#include <stdarg.h>
#include <stddef.h>
#include <stdio.h> /* TODO(bill): Remove and replace with OS Specific stuff */
#include <stdlib.h>
#include <string.h> /* NOTE(bill): For memcpy, memmove, memcmp, etc. */
#include <sys/stat.h> /* NOTE(bill): File info */
#include <intrin.h>
#if defined(GB_SYSTEM_WINDOWS)
#define NOMINMAX 1
#define WIN32_LEAN_AND_MEAN 1
#define WIN32_MEAN_AND_LEAN 1
#define VC_EXTRALEAN 1
#include <windows.h>
#include <direct.h>
#include <malloc.h>
#else
#include <dlfcn.h>
#include <mach/mach_time.h>
#include <pthread.h>
#include <sys/stat.h>
#include <time.h>
#include <unistd.h>
#endif
/***************************************************************
*
* Base Types
*
*/
/* NOTE(bill); To mark types changing their size, e.g. intptr */
#ifndef _W64
#if !defined(__midl) && (defined(_X86_) || defined(_M_IX86)) && _MSC_VER >= 1300
#define _W64 __w64
#else
#define _W64
#endif
#endif
#if defined(_MSC_VER)
#if _MSC_VER < 1300
typedef unsigned char u8;
typedef signed char i8;
typedef unsigned short u16;
typedef signed short i16;
typedef unsigned int u32;
typedef signed int i32;
#else
typedef unsigned __int8 u8;
typedef signed __int8 i8;
typedef unsigned __int16 u16;
typedef signed __int16 i16;
typedef unsigned __int32 u32;
typedef signed __int32 i32;
#endif
typedef unsigned __int64 u64;
typedef signed __int64 i64;
#else
#include <stdint.h>
typedef uint8_t u8;
typedef int8_t i8;
typedef uint16_t u16;
typedef int16_t i16;
typedef uint32_t u32;
typedef int32_t i32;
typedef uint64_t u64;
typedef int64_t i64;
#endif
GB_STATIC_ASSERT(sizeof(u8) == sizeof(i8));
GB_STATIC_ASSERT(sizeof(u16) == sizeof(i16));
GB_STATIC_ASSERT(sizeof(u32) == sizeof(i32));
GB_STATIC_ASSERT(sizeof(u64) == sizeof(i64));
GB_STATIC_ASSERT(sizeof(u8) == 1);
GB_STATIC_ASSERT(sizeof(u16) == 2);
GB_STATIC_ASSERT(sizeof(u32) == 4);
GB_STATIC_ASSERT(sizeof(u64) == 8);
typedef size_t usize;
typedef ptrdiff_t isize;
GB_STATIC_ASSERT(sizeof(usize) == sizeof(isize));
#if defined(_WIN64)
typedef signed __int64 intptr;
typedef unsigned __int64 uintptr;
#elif defined(_WIN32)
typedef _W64 signed int intptr;
typedef _W64 unsigned int uintptr;
#else
typedef uintptr_t uintptr;
typedef intptr_t intptr;
#endif
typedef float f32;
typedef double f64;
GB_STATIC_ASSERT(sizeof(f32) == 4);
GB_STATIC_ASSERT(sizeof(f64) == 8);
typedef char char8; /* NOTE(bill): Probably redundant but oh well! */
typedef u16 char16;
typedef u32 char32;
/* NOTE(bill): I think C99 and C++ `bool` is stupid for numerous reasons but there are too many
* to write in this small comment.
*/
typedef i8 b8;
typedef i16 b16;
typedef i32 b32; /* NOTE(bill): Prefer this!!! */
/* NOTE(bill): Get true and false */
#if !defined(__cplusplus)
#if (defined(_MSC_VER) && _MSC_VER <= 1800) || !defined(__STDC_VERSION__)
#ifndef false
#define false 0
#endif
#ifndef true
#define true 1
#endif
#else
#include <stdbool.h>
#endif
#endif
/* NOTE(bill): These do are not prefixed with gb because the types are not. */
#ifndef U8_MIN
#define U8_MIN 0u
#define U8_MAX 0xffu
#define I8_MIN (-0x7f - 1)
#define I8_MAX 0x7f
#define U16_MIN 0u
#define U16_MAX 0xffffu
#define I16_MIN (-0x7fff - 1)
#define I16_MAX 0x7fff
#define U32_MIN 0u
#define U32_MAX 0xffffffffu
#define I32_MIN (-0x7fffffff - 1)
#define I32_MAX 0x7fffffff
#define U64_MIN 0ull
#define U64_MAX 0xffffffffffffffffull
#define I64_MIN (-0x7fffffffffffffffll - 1)
#define I64_MAX 0x7fffffffffffffffll
#if defined(GB_ARCH_32_BIT)
#define USIZE_MIX U32_MIN
#define USIZE_MAX U32_MAX
#define ISIZE_MIX S32_MIN
#define ISIZE_MAX S32_MAX
#elif defined(GB_ARCH_64_BIT)
#define USIZE_MIX U64_MIN
#define USIZE_MAX U64_MAX
#define ISIZE_MIX I64_MIN
#define ISIZE_MAX I64_MAX
#else
#error Unknown architecture size. This library only supports 32 bit and 64 bit architectures.
#endif
#define F32_MIN 1.17549435e-38f
#define F32_MAX 3.40282347e+38f
#define F64_MIN 2.2250738585072014e-308
#define F64_MAX 1.7976931348623157e+308
#endif
#ifndef NULL
#if defined(__cplusplus)
#if __cplusplus >= 201103L
#define NULL nullptr
#else
#define NULL 0
#endif
#else
#define NULL ((void *)0)
#endif
#endif
/* TODO(bill): Is this enough to get inline working? */
#if !defined(__cplusplus)
#if defined(_MSC_VER) && _MSC_VER <= 1800
#define inline __inline
#elif !defined(__STDC_VERSION__)
#define inline __inline__
#else
#define inline
#endif
#endif
#if !defined(gb_restrict)
#if defined(_MSC_VER)
#define gb_restrict __restrict
#elif defined(__STDC_VERSION__)
#define gb_restrict restrict
#else
#define gb_restrict
#endif
#endif
/* TODO(bill): Should force inline be a separate keyword and gb_inline be inline? */
#if !defined(gb_inline)
#if defined(_MSC_VER)
#if _MSC_VER < 1300
#define gb_inline
#else
#define gb_inline __forceinline
#endif
#else
#define gb_inline __attribute__ ((__always_inline__))
#endif
#endif
#if !defined(gb_no_inline)
#if defined(_MSC_VER)
#define gb_no_inline __declspec(noinline)
#else
#define gb_no_inline __attribute__ ((noinline))
#endif
#endif
/* NOTE(bill): Easy to grep */
/* NOTE(bill): Not needed in macros */
#ifndef cast
#define cast(Type) (Type)
#endif
/* NOTE(bill): Because a signed sizeof is more useful */
#ifndef gb_size_of
#define gb_size_of(x) (isize)(sizeof(x))
#endif
#ifndef gb_count_of
#define gb_count_of(x) ((gb_size_of(x)/gb_size_of(0[x])) / ((isize)(!(gb_size_of(x) % gb_size_of(0[x])))))
#endif
#ifndef gb_offset_of
#define gb_offset_of(Type, element) ((isize)&(((Type *)0)->element))
#endif
#if defined(__cplusplus)
#ifndef gb_align_of
#if __cplusplus >= 201103L
#define gb_align_of(Type) (isize)alignof(Type)
#else
extern "C++" {
/* NOTE(bill): Fucking Templates! */
template <typename T> struct gbAlignment_Trick { char c; T member; };
#define gb_align_of(Type) gb_offset_of(gbAlignment_Trick<Type>, member)
}
#endif
#endif
#else
#ifndef gb_align_of
#define gb_align_of(Type) gb_offset_of(struct { char c; Type member; }, member)
#endif
#endif
/* NOTE(bill): I do wish I had a type_of that was portable */
#ifndef gb_swap
#define gb_swap(Type, a, b) do { Type tmp = (a); (a) = (b); (b) = tmp; } while (0)
#endif
/* NOTE(bill): Because static means 3/4 different things in C/C++. Great design (!) */
#ifndef gb_global
#define gb_global static /* Global variables */
#define gb_internal static /* Internal linkage */
#define gb_local_persist static /* Local Persisting variables */
#endif
#ifndef gb_unused
#define gb_unused(x) ((void)(gb_size_of(x)))
#endif
/***************************************************************
*
* Defer statement
* Akin to D's SCOPE_EXIT or
* similar to Go's defer but scope-based
*
* NOTE: C++11 (and above) only!
*/
#if defined(__cplusplus) && __cplusplus >= 201103L
extern "C++" {
namespace gb {
/* NOTE(bill): Stupid fucking templates */
template <typename T> struct RemoveReference { typedef T Type; };
template <typename T> struct RemoveReference<T &> { typedef T Type; };
template <typename T> struct RemoveReference<T &&> { typedef T Type; };
/* NOTE(bill): "Move" semantics - invented because the C++ committee are idiots (as a collective not as indiviuals (well a least some aren't)) */
template <typename T> inline T &&forward(typename RemoveReference<T>::Type &t) { return static_cast<T &&>(t); }
template <typename T> inline T &&forward(typename RemoveReference<T>::Type &&t) { return static_cast<T &&>(t); }
template <typename T> inline T &&move (T &&t) { return static_cast<typename RemoveReference<T>::Type &&>(t); }
template <typename F>
struct privDefer {
F f;
privDefer(F &&f) : f(forward<F>(f)) {}
~privDefer() { f(); }
};
template <typename F> privDefer<F> priv_defer_func(F &&f) { return privDefer<F>(forward<F>(f)); }
#ifndef defer
#define GB_DEFER_1(x, y) x##y
#define GB_DEFER_2(x, y) GB_DEFER_1(x, y)
#define GB_DEFER_3(x) GB_DEFER_2(x, __COUNTER__)
#define defer(code) auto GB_DEFER_3(_defer_) = gb::priv_defer_func([&](){code;})
#endif
} /* namespace gb */
}
/* Example */
#if 0
gbMutex m;
gb_mutex_init(&m);
{
gb_mutex_lock(&m);
defer (gb_mutex_unlock(&m));
...
}
#endif
#endif
/***************************************************************
*
* Macro Fun!
*
*/
#ifndef GB_JOIN_MACROS
#define GB_JOIN_MACROS
#define GB_JOIN2_IND(a, b) a##b
#define GB_JOIN2(a, b) GB_JOIN2_IND(a, b)
#define GB_JOIN3(a, b, c) GB_JOIN2(GB_JOIN2(a, b), c)
#define GB_JOIN4(a, b, c, d) GB_JOIN2(GB_JOIN2(GB_JOIN2(a, b), c), d)
#endif
#ifndef GB_BIT
#define GB_BIT(x) (1<<x)
#endif
#ifndef gb_min
#define gb_min(a, b) ((a) < (b) ? (a) : (b))
#endif
#ifndef gb_max
#define gb_max(a, b) ((a) > (b) ? (a) : (b))
#endif
#ifndef gb_clamp
#define gb_clamp(x, lower, upper) gb_min(gb_max((x), (lower)), (upper))
#endif
#ifndef gb_clamp01
#define gb_clamp01(x) gb_clamp((x), 0, 1)
#endif
#ifndef gb_is_between
#define gb_is_between(x, lower, upper) (((x) >= (lower)) && ((x) <= (upper)))
#endif
/***************************************************************
*
* Debug
*
*/
#ifndef GB_DEBUG_TRAP
#if defined(_MSC_VER)
#if _MSC_VER < 1300
#define GB_DEBUG_TRAP() __asm int 3; /* Trap to debugger! */
#else
#define GB_DEBUG_TRAP() __debugbreak()
#endif
#else
#define GB_DEBUG_TRAP() __builtin_trap()
#endif
#endif
#ifndef GB_ASSERT_MSG
#define GB_ASSERT_MSG(cond, msg) do { \
if (!(cond)) { \
gb_assert_handler(#cond, __FILE__, cast(i64)__LINE__, msg); \
GB_DEBUG_TRAP(); \
} \
} while (0)
#endif
#ifndef GB_ASSERT
#define GB_ASSERT(cond) GB_ASSERT_MSG(cond, NULL)
#endif
#ifndef GB_ASSERT_NOT_NULL
#define GB_ASSERT_NOT_NULL(ptr) GB_ASSERT_MSG((ptr) != NULL, #ptr " must not be NULL")
#endif
/* NOTE(bill): Things that shouldn't happen with a message! */
#ifndef GB_PANIC
#define GB_PANIC(msg) GB_ASSERT_MSG(0, msg)
#endif
GB_DEF void gb_assert_handler(char const *condition, char const *file, i32 line, char const *msg);
/***************************************************************
*
* Printing
*
*/
/* NOTE(bill): Some compilers support applying printf-style warnings to user functions. */
#if defined(__clang__) || defined(__GNUC__)
#define GB_PRINTF_ARGS(FMT) __attribute__((format(printf, FMT, (FMT+1))))
#else
#define GB_PRINTF_ARGS(FMT)
#endif
GB_DEF i32 gb_printf (char const *fmt, ...) GB_PRINTF_ARGS(1);
GB_DEF i32 gb_printf_va (char const *fmt, va_list va);
GB_DEF i32 gb_fprintf (FILE *f, char const *fmt, ...) GB_PRINTF_ARGS(2);
GB_DEF i32 gb_fprintf_va (FILE *f, char const *fmt, va_list va);
GB_DEF char *gb_sprintf (char const *fmt, ...) GB_PRINTF_ARGS(1); /* NOTE(bill): A locally persisting buffer is used internally */
GB_DEF char *gb_sprintf_va (char const *fmt, va_list va); /* NOTE(bill): A locally persisting buffer is used internally */
GB_DEF i32 gb_snprintf (char *str, isize n, char const *fmt, ...) GB_PRINTF_ARGS(3);
GB_DEF i32 gb_snprintf_va(char *str, isize n, char const *fmt, va_list va);
GB_DEF i32 gb_println (char const *str);
GB_DEF i32 gb_fprintln(FILE *f, char const *str);
/***************************************************************
*
* Memory
*
*/
GB_DEF isize gb_is_power_of_two(isize x);
GB_DEF void * gb_align_forward(void *ptr, isize alignment);
GB_DEF void * gb_pointer_add (void *ptr, isize bytes);
GB_DEF void * gb_pointer_sub (void *ptr, isize bytes);
GB_DEF void const *gb_pointer_add_const(void const *ptr, isize bytes);
GB_DEF void const *gb_pointer_sub_const(void const *ptr, isize bytes);
GB_DEF isize gb_pointer_diff (void const *begin, void const *end);
GB_DEF void gb_zero_size(void *ptr, isize size);
#ifndef gb_zero_struct
#define gb_zero_struct(t) gb_zero_size((t), gb_size_of(*(t))) /* NOTE(bill): Pass pointer of struct */
#define gb_zero_array(a, count) gb_zero_size((a), gb_size_of(*(a))*count)
#endif
GB_DEF void *gb_memcopy(void *gb_restrict dest, void const *gb_restrict source, isize size);
GB_DEF void *gb_memmove(void *dest, void const *source, isize size);
GB_DEF void *gb_memset (void *data, u8 byte_value, isize size);
/* NOTE(bill): Very similar to doing `*cast(T *)(&u)` */
#ifndef GB_BIT_CAST
#define GB_BIT_CAST(dest, source) do { \
GB_STATIC_ASSERT(gb_size_of(*(dest)) <= gb_size_of(source)); \
gb_memcopy((dest), &(source), gb_size_of(*dest)); \
} while (0)
#endif
#ifndef gb_kilobytes
#define gb_kilobytes(x) ( (x) * (i64)(1024))
#define gb_megabytes(x) (gb_kilobytes(x) * (i64)(1024))
#define gb_gigabytes(x) (gb_megabytes(x) * (i64)(1024))
#define gb_terabytes(x) (gb_gigabytes(x) * (i64)(1024))
#endif
/* Atomics */
#if defined(_MSC_VER)
typedef struct gbAtomic32 { i32 value; } gbAtomic32;
typedef struct gbAtomic64 { i64 value; } gbAtomic64;
#else
typedef struct gbAtomic32 { i32 volatile value; } __attribute__ ((aligned(4))) gbAtomic32;
typedef struct gbAtomic64 { i64 volatile value; } __attribute__ ((aligned(8))) gbAtomic64;
#endif
GB_DEF i32 gb_atomic32_load (gbAtomic32 const volatile *a);
GB_DEF void gb_atomic32_store (gbAtomic32 volatile *a, i32 value);
GB_DEF i32 gb_atomic32_compare_exchange(gbAtomic32 volatile *a, i32 expected, i32 desired);
GB_DEF i32 gb_atomic32_exchanged (gbAtomic32 volatile *a, i32 desired);
GB_DEF i32 gb_atomic32_fetch_add (gbAtomic32 volatile *a, i32 operand);
GB_DEF i32 gb_atomic32_fetch_and (gbAtomic32 volatile *a, i32 operand);
GB_DEF i32 gb_atomic32_fetch_or (gbAtomic32 volatile *a, i32 operand);
GB_DEF i64 gb_atomic64_load (gbAtomic64 const volatile *a);
GB_DEF void gb_atomic64_store (gbAtomic64 volatile *a, i64 value);
GB_DEF i64 gb_atomic64_compare_exchange(gbAtomic64 volatile *a, i64 expected, i64 desired);
GB_DEF i64 gb_atomic64_exchanged (gbAtomic64 volatile *a, i64 desired);
GB_DEF i64 gb_atomic64_fetch_add (gbAtomic64 volatile *a, i64 operand);
GB_DEF i64 gb_atomic64_fetch_and (gbAtomic64 volatile *a, i64 operand);
GB_DEF i64 gb_atomic64_fetch_or (gbAtomic64 volatile *a, i64 operand);
/* Mutex */
typedef struct gbMutex {
#if defined(GB_SYSTEM_WINDOWS)
void *win32_semaphore_handle;
gbAtomic32 counter;
#else
pthread_mutex_t posix_handle;
#endif
} gbMutex;
GB_DEF void gb_mutex_init (gbMutex *m);
GB_DEF void gb_mutex_destroy (gbMutex *m);
GB_DEF void gb_mutex_lock (gbMutex *m);
GB_DEF b32 gb_mutex_try_lock(gbMutex *m);
GB_DEF void gb_mutex_unlock (gbMutex *m);
/* NOTE(bill): If you wanted a Scoped Mutex in C++, why not use the defer() construct?
* No need for a silly wrapper class and it's clear!
*/
#if 0
gbMutex m = {0};
gb_mutex_init(&m);
{
gb_mutex_lock(&m);
defer (gb_mutex_unlock(&m));
/* Do whatever as the mutex is now scoped based! */
}
#endif
/* TODO(bill): Should I create a Condition Type? (gbCond vs gbCondition) */
typedef struct gbSemaphore {
#if defined(GB_SYSTEM_WINDOWS)
void *win32_handle;
#else
/* TODO(bill): Use a "native" semaphore rather than this mutex/condition pair */
gbMutex mutex;
pthread_cond_t cond;
i32 count;
#endif
} gbSemaphore;
GB_DEF void gb_semaphore_init (gbSemaphore *s);
GB_DEF void gb_semaphore_destroy(gbSemaphore *s);
GB_DEF void gb_semaphore_post (gbSemaphore *s, i32 count);
GB_DEF void gb_semaphore_wait (gbSemaphore *s);
#define GB_THREAD_PROC(name) void name(void *data)
typedef GB_THREAD_PROC(gbThreadProc);
typedef struct gbThread {
#if defined(GB_SYSTEM_WINDOWS)
void *win32_handle;
#else
pthread_t posix_handle;
#endif
gbThreadProc *proc;
void *data;
gbSemaphore semaphore;
isize stack_size;
b32 is_running;
} gbThread;
GB_DEF void gb_thread_init (gbThread *t);
GB_DEF void gb_thread_destory (gbThread *t);
GB_DEF void gb_thread_start (gbThread *t, gbThreadProc *proc, void *data);
GB_DEF void gb_thread_start_with_stack(gbThread *t, gbThreadProc *proc, void *data, isize stack_size);
GB_DEF void gb_thread_join (gbThread *t);
GB_DEF b32 gb_thread_is_running (gbThread const *t);
GB_DEF u32 gb_thread_current_id (void);
GB_DEF void gb_thread_set_name (gbThread *t, char const *name);
/***************************************************************
*
* Virtual Memory
*
* Still incomplete and needs working on a lot as it's shit!
*/
/* TODO(bill): Track a lot more than just the pointer and size! */
typedef struct gbVirtualMemory {
void *data;
isize size;
} gbVirtualMemory;
GB_DEF gbVirtualMemory gb_vm_alloc(void *addr, isize size);
GB_DEF void gb_vm_free (gbVirtualMemory vm);
GB_DEF gbVirtualMemory gb_vm_trim (gbVirtualMemory vm, isize lead_size, isize size);
GB_DEF b32 gb_vm_purge(gbVirtualMemory vm);
/***************************************************************
*
* Custom Allocation
*
*/
typedef enum gbAllocationType {
GB_ALLOCATION_ALLOC,
GB_ALLOCATION_FREE,
GB_ALLOCATION_FREE_ALL,
GB_ALLOCATION_RESIZE
} gbAllocationType;
/* NOTE(bill): This is useful so you can define an allocator of the same type and parameters */
#define GB_ALLOCATOR_PROC(name) \
void *name(void *allocator_data, gbAllocationType type, \
isize size, isize alignment, \
void *old_memory, isize old_size, \
u64 options)
typedef GB_ALLOCATOR_PROC(gbAllocatorProc);
typedef struct gbAllocator {
gbAllocatorProc *proc;
void *data;
} gbAllocator;
#ifndef GB_DEFAULT_MEMORY_ALIGNMENT
#define GB_DEFAULT_MEMORY_ALIGNMENT 4
#endif
GB_DEF void *gb_alloc_align (gbAllocator a, isize size, isize alignment);
GB_DEF void *gb_alloc (gbAllocator a, isize size);
GB_DEF void gb_free (gbAllocator a, void *ptr);
GB_DEF void gb_free_all (gbAllocator a);
GB_DEF void *gb_resize (gbAllocator a, void *ptr, isize old_size, isize new_size);
GB_DEF void *gb_resize_align(gbAllocator a, void *ptr, isize old_size, isize new_size, isize alignment);
/* TODO(bill): For gb_resize, should the use need to pass the old_size or only the new_size? */
GB_DEF void *gb_alloc_copy (gbAllocator a, void const *src, isize size);
GB_DEF void *gb_alloc_copy_align(gbAllocator a, void const *src, isize size, isize alignment);
GB_DEF char *gb_alloc_str(gbAllocator a, char const *str);
/* NOTE(bill): These are very useful and the type cast has saved me from numerous bugs */
#ifndef gb_alloc_struct
#define gb_alloc_struct(allocator, Type) (Type *)gb_alloc(allocator, gb_size_of(Type))
#define gb_alloc_array(allocator, Type, count) (Type *)gb_alloc(allocator, gb_size_of(Type) * (count))
#endif
/* NOTE(bill): Use this if you don't need a "fancy" resize allocation */
GB_DEF void *gb_default_resize_align(gbAllocator a, void *ptr, isize old_size, isize new_size, isize alignment);
/* TODO(bill): Probably use a custom heap allocator system that doesn't depend on malloc/free
* Base it off TCMalloc or something else? Or something entirely custom?
*/
GB_DEF gbAllocator gb_heap_allocator(void);
GB_DEF GB_ALLOCATOR_PROC(gb_heap_allocator_proc);
/* NOTE(bill): Yep, I use my own allocator system! */
#ifndef gb_malloc
#define gb_malloc(sz) gb_alloc(gb_heap_allocator(), sz)
#define gb_mfree(ptr) gb_free(gb_heap_allocator(), ptr)
#endif
/*
* Arena Allocator
*/
typedef struct gbArena {
gbAllocator backing;
void *physical_start;
isize total_size;
isize total_allocated;
u32 temp_count;
} gbArena;
GB_DEF void gb_arena_init_from_memory (gbArena *arena, void *start, isize size);
GB_DEF void gb_arena_init_from_allocator(gbArena *arena, gbAllocator backing, isize size);
GB_DEF void gb_arena_init_sub (gbArena *arena, gbArena *parent_arena, isize size);
GB_DEF void gb_arena_free (gbArena *arena);
GB_DEF isize gb_arena_alignment_of (gbArena *arena, isize alignment);
GB_DEF isize gb_arena_size_remaining(gbArena *arena, isize alignment);
GB_DEF void gb_arena_check (gbArena *arena);
/* Allocation Types: alloc, free_all, resize */
GB_DEF gbAllocator gb_arena_allocator(gbArena *arena);
GB_DEF GB_ALLOCATOR_PROC(gb_arena_allocator_proc);
typedef struct gbTempArenaMemory {
gbArena *arena;
isize original_count;
} gbTempArenaMemory;
GB_DEF gbTempArenaMemory gb_temp_arena_memory_begin(gbArena *arena);
GB_DEF void gb_temp_arena_memory_end (gbTempArenaMemory tmp_mem);
/*
* Pool Allocator
*/
typedef struct gbPool {
gbAllocator backing;
void *physical_start;
void *free_list;
isize block_size;
isize block_align;
isize total_size;
} gbPool;
GB_DEF void gb_pool_init (gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size);
GB_DEF void gb_pool_init_align(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size, isize block_align);
GB_DEF void gb_pool_free (gbPool *pool);
/* Allocation Types: alloc, free */
GB_DEF gbAllocator gb_pool_allocator(gbPool *pool);
GB_DEF GB_ALLOCATOR_PROC(gb_pool_allocator_proc);
/* NOTE(bill): Used for allocators to keep track of sizes */
typedef struct gbAllocationHeader {
isize size;
} gbAllocationHeader;
GB_DEF gbAllocationHeader *gb_allocation_header (void *data);
GB_DEF void gb_allocation_header_fill(gbAllocationHeader *header, void *data, isize size);
/* TODO(bill): Find better way of doing this without #if #elif etc. */
#if defined(GB_ARCH_32_BIT)
#define GB_ISIZE_HIGH_BIT 0x80000000
#elif defined(GB_ARCH_64_BIT)
#define GB_ISIZE_HIGH_BIT 0x8000000000000000ll
#else
#error
#endif
/*
* Free List Allocator
*/
/* IMPORTANT TODO(bill): Thoroughly test the free list allocator! */
/* NOTE(bill): This is a very shitty free list as it just picks the first free block not the best size
* as I am just being lazy. Also, I will probably remove it later; it's only here because why not?!
*/
/* NOTE(bill): I may also complete remove this if I completely implement a fixed heap allocator */
typedef struct gbFreeListBlock {
struct gbFreeListBlock *next;
isize size;
} gbFreeListBlock;
typedef struct gbFreeList {
void * physical_start;
isize total_size;
gbFreeListBlock *curr_block;
isize total_allocated;
isize allocation_count;
} gbFreeList;
GB_DEF void gb_free_list_init (gbFreeList *fl, void *start, isize size);
GB_DEF void gb_free_list_init_from_allocator(gbFreeList *fl, gbAllocator backing, isize size);
/* Allocation Types: alloc, free, free_all, resize */
GB_DEF gbAllocator gb_free_list_allocator(gbFreeList *fl);
GB_DEF GB_ALLOCATOR_PROC(gb_free_list_allocator_proc);
/*
* Scratch Memory Allocator - Ring Buffer Based Arena
*/
typedef struct gbScratchMemory {
void *physical_start;
isize total_size;
void *alloc_point, *free_point;
} gbScratchMemory;
GB_DEF void gb_scratch_memory_init (gbScratchMemory *s, void *start, isize size);
GB_DEF b32 gb_scratch_memory_is_in_use(gbScratchMemory *s, void *ptr);
/* Allocation Types: alloc, free, free_all, resize */
GB_DEF gbAllocator gb_scratch_allocator(gbScratchMemory *s);
GB_DEF GB_ALLOCATOR_PROC(gb_scratch_allocator_proc);
/* TODO(bill): Stack allocator */
/* TODO(bill): Fixed heap allocator */
/* TODO(bill): General heap allocator. Maybe a TCMalloc like clone? */
/***************************************************************
*
* Sort & Search
*
*/
#define GB_COMPARE_PROC(name) int name(void const *a, void const *b)
typedef GB_COMPARE_PROC(gbCompareProc);
#define GB_COMPARE_PROC_PTR(def) GB_COMPARE_PROC((*def))
/* Producure pointers */
/* NOTE(bill): The offset parameter specifies the offset in the structure
* e.g. gb_i32_cmp(gb_offset_of(Thing, value))
* Use 0 if it's just the type instead.
*/
GB_DEF GB_COMPARE_PROC_PTR(gb_i16_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_i32_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_i64_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_isize_cmp(isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_str_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_f32_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_f64_cmp (isize offset));
GB_DEF GB_COMPARE_PROC_PTR(gb_char_cmp (isize offset));
/* TODO(bill): Better sorting algorithms */
#define gb_qsort_array(array, count, compare_proc) gb_qsort(array, count, gb_size_of(*(array)), compare_proc)
GB_DEF void gb_qsort(void *base, isize count, isize size, gbCompareProc compare_proc);
/* NOTE(bill): the count of temp == count of items */
GB_DEF void gb_radix_sort_u8 (u8 *gb_restrict items, u8 *gb_restrict temp, isize count);
GB_DEF void gb_radix_sort_u16(u16 *gb_restrict items, u16 *gb_restrict temp, isize count);
GB_DEF void gb_radix_sort_u32(u32 *gb_restrict items, u32 *gb_restrict temp, isize count);
GB_DEF void gb_radix_sort_u64(u64 *gb_restrict items, u64 *gb_restrict temp, isize count);
/* NOTE(bill): Returns index or -1 if not found */
#define gb_binary_search_array(array, count, key, compare_proc) gb_binary_search(array, count, gb_size_of(*(array)), key, compare_proc)
GB_DEF isize gb_binary_search(void const *base, isize count, isize size, void const *key, gbCompareProc compare_proc);
/***************************************************************
*
* Char Functions
*
*/
GB_DEF char gb_char_to_lower (char c);
GB_DEF char gb_char_to_upper (char c);
GB_DEF b32 gb_char_is_space (char c);
GB_DEF b32 gb_char_is_digit (char c);
GB_DEF b32 gb_char_is_hex_digit (char c);
GB_DEF b32 gb_char_is_alpha (char c);
GB_DEF b32 gb_char_is_alphanumeric(char c);
GB_DEF i32 gb_digit_to_int (char c);
GB_DEF i32 gb_hex_digit_to_int (char c);
/* NOTE(bill): ASCII only */
GB_DEF void gb_to_lower(char *str);
GB_DEF void gb_to_upper(char *str);
GB_DEF isize gb_strlen (char const *str);
GB_DEF isize gb_strnlen(char const *str, isize max_len);
GB_DEF i32 gb_strcmp (char const *s1, char const *s2);
GB_DEF i32 gb_strncmp(char const *s1, char const *s2, isize len);
GB_DEF char *gb_strcpy (char *dest, char const *source);
GB_DEF char *gb_strncpy(char *dest, char const *source, isize len);
/* NOTE(bill): A less fucking crazy strtok! */
GB_DEF char const *gb_strtok(char *output, char const *src, char const *delimit);
GB_DEF b32 gb_str_has_prefix(char const *str, char const *prefix);
GB_DEF b32 gb_str_has_suffix(char const *str, char const *suffix);
GB_DEF char const *gb_char_first_occurence(char const *str, char c);
GB_DEF char const *gb_char_last_occurence (char const *str, char c);
GB_DEF void gb_str_concat(char *dest, isize dest_len,
char const *src_a, isize src_a_len,
char const *src_b, isize src_b_len);
/***************************************************************
*
* UTF-8 Handling
*
*
*/
GB_DEF isize gb_utf8_strlen (char const *str);
GB_DEF isize gb_utf8_strnlen(char const *str, isize max_len);
/* Windows doesn't handle 8 bit filenames well ('cause Micro$hit) */
GB_DEF char16 *gb_utf8_to_utf16(char16 *buffer, char *str, isize len);
GB_DEF char * gb_utf16_to_utf8(char *buffer, char16 *str, isize len);
/* NOTE(bill): Returns size of codepoint in bytes */
GB_DEF isize gb_utf8_decode (char const *str, char32 *codepoint);
GB_DEF isize gb_utf8_decode_len(char const *str, isize str_len, char32 *codepoint);
/***************************************************************
*
* gbString - C Read-Only-Compatible
*
*
Reasoning:
By default, strings in C are null terminated which means you have to count
the number of character up to the null character to calculate the length.
Many "better" C string libraries will create a struct for a string.
i.e.
struct String {
Allocator allocator;
size_t length;
size_t capacity;
char * cstring;
};
This library tries to augment normal C strings in a better way that is still
compatible with C-style strings.
+--------+-----------------------+-----------------+
| Header | Binary C-style String | Null Terminator |
+--------+-----------------------+-----------------+
|
+-> Pointer returned by functions
Due to the meta-data being stored before the string pointer and every gb string
having an implicit null terminator, gb strings are full compatible with c-style
strings and read-only functions.
Advantages:
* gb strings can be passed to C-style string functions without accessing a struct
member of calling a function, i.e.
printf("%s\n", gb_str);
Many other libraries do either of these:
printf("%s\n", string->cstr);
printf("%s\n", get_cstring(string));
* You can access each character just like a C-style string:
printf("%c %c\n", str[0], str[13]);
* gb strings are singularly allocated. The meta-data is next to the character
array which is better for the cache.
Disadvantages:
* In the C version of these functions, many return the new string. i.e.
str = gb_string_appendc(str, "another string");
This could be changed to gb_string_appendc(&str, "another string"); but I'm still not sure.
* This is incompatible with "gb_string.h" strings
*/
#if 0
#include <stdio.h>
#include <stdlib.h>
#define GB_IMPLEMENTATION
#include "gb.h"
int main(int argc, char **argv)
{
gbString str = gb_string_make("Hello");
gbString other_str = gb_string_make_length(", ", 2);
str = gb_string_append(str, other_str);
str = gb_string_appendc(str, "world!");
printf("%s\n", str); /* Hello, world! */
printf("str length = %d\n", gb_string_length(str));
str = gb_string_set(str, "Potato soup");
printf("%s\n", str); /* Potato soup */
str = gb_string_set(str, "Hello");
other_str = gb_string_set(other_str, "Pizza");
if (gb_strings_are_equal(str, other_str))
printf("Not called\n");
else
printf("Called\n");
str = gb_string_set(str, "Ab.;!...AHello World ??");
str = gb_string_trim(str, "Ab.;!. ?");
printf("%s\n", str); /* "Hello World" */
gb_string_free(str);
gb_string_free(other_str);
return 0;
}
#endif
typedef char *gbString;
/* NOTE(bill): If you only need a small string, just use a standard c string or change the size from isize to u16, etc. */
typedef struct gbStringHeader {
gbAllocator allocator;
isize length;
isize capacity;
} gbStringHeader;
#define GB_STRING_HEADER(str) (cast(gbStringHeader *)(str) - 1)
GB_DEF gbString gb_string_make (gbAllocator a, char const *str);
GB_DEF gbString gb_string_make_length(gbAllocator a, void const *str, isize num_bytes);
GB_DEF void gb_string_free (gbString str);
GB_DEF gbString gb_string_duplicate(gbAllocator a, gbString const str);
GB_DEF isize gb_string_length (gbString const str);
GB_DEF isize gb_string_capacity (gbString const str);
GB_DEF isize gb_string_available_space(gbString const str);
GB_DEF void gb_string_clear(gbString str);
GB_DEF gbString gb_string_append (gbString str, gbString const other);
GB_DEF gbString gb_string_append_length(gbString str, void const *other, isize num_bytes);
GB_DEF gbString gb_string_appendc (gbString str, char const *other);
GB_DEF gbString gb_string_set(gbString str, char const *cstr);
GB_DEF gbString gb_string_make_space_for(gbString str, isize add_len);
GB_DEF isize gb_string_allocation_size (gbString const str);
GB_DEF b32 gb_string_are_equal(gbString const lhs, gbString const rhs);
GB_DEF gbString gb_string_trim (gbString str, char const *cut_set);
GB_DEF gbString gb_string_trim_space(gbString str); /* Whitespace ` \t\r\n\v\f` */
/***************************************************************
*
* Fixed Capacity Buffer (POD Types)
*
*
gbBuffer(Type) works like gbString or gbArray where the actual type is just a pointer to the first
element.
*/
typedef struct gbBufferHeader {
isize count;
isize capacity;
} gbBufferHeader;
#define gbBuffer(Type) Type *
#define GB_BUFFER_HEADER(x) (cast(gbBufferHeader *)(x) - 1)
#define gb_buffer_count(x) (GB_BUFFER_HEADER(x)->count)
#define gb_buffer_capacity(x) (GB_BUFFER_HEADER(x)->capacity)
#define gb_buffer_init(x, allocator, cap) do { \
void **nx = cast(void **)&(x); \
gbBufferHeader *gb__bh = cast(gbBufferHeader *)gb_alloc((allocator), (cap)*gb_size_of(*(x))); \
gb__bh->count = 0; \
gb__bh->capacity = cap; \
*nx = cast(void *)(gb__bh+1); \
} while (0)
#define gb_buffer_free(x, allocator) (gb_free(allocator, GB_BUFFER_HEADER(x)))
#define gb_buffer_append(x, item) do { (x)[gb_buffer_count(x)++] = (item); } while (0)
#define gb_buffer_appendv(x, items, item_count) do { \
GB_ASSERT(gb_size_of(*(items)) == gb_size_of(*(x))); \
GB_ASSERT(gb_buffer_count(x)+item_count <= gb_buffer_capacity(x)); \
gb_memcopy(&(x)[gb_buffer_count(x)], (items), gb_size_of(*(x))*(item_count)); \
gb_buffer_count(x) += (item_count); \
} while (0)
#define gb_buffer_pop(x) do { GB_ASSERT(gb_buffer_count(x) > 0); gb_buffer_count(x)--; } while (0)
#define gb_buffer_clear(x) do { gb_buffer_count(x) = 0; } while (0)
/***************************************************************
*
* Dynamic Array (POD Types)
*
NOTE(bill): I know this is a macro hell but C is an old (and shit) language with no proper arrays
Also why the fuck not?! It fucking works! And it has custom allocation, which is already better than C++!
gbArray(Type) works like gbString or gbBuffer where the actual type is just a pointer to the first
element.
*/
/* Available Procedures for gbArray(Type)
* gb_array_init
* gb_array_free
* gb_array_set_capacity
* gb_array_grow
* gb_array_append
* gb_array_appendv
* gb_array_pop
* gb_array_clear
* gb_array_resize
* gb_array_reserve
*/
#if 0 /* Example */
void foo(void)
{
isize i;
int test_values[] = {4, 2, 1, 7};
gbAllocator a = gb_heap_allocator();
gbArray(int) items;
gb_array_init(items, a);
gb_array_append(items, 1);
gb_array_append(items, 4);
gb_array_append(items, 9);
gb_array_append(items, 16);
items[1] = 3; /* Manually set value */
/* NOTE: No array bounds checking */
for (i = 0; i < items.count; i++)
gb_printf("%d\n", items[i]);
/* 1
* 3
* 9
* 16
*/
gb_array_clear(items);
gb_array_appendv(items, test_values, gb_count_of(test_values));
for (i = 0; i < items.count; i++)
gb_printf("%d\n", items[i]);
/* 4
* 2
* 1
* 7
*/
gb_array_free(items);
}
#endif
typedef struct gbArrayHeader {
gbAllocator allocator;
isize count;
isize capacity;
} gbArrayHeader;
/* NOTE(bill): This thing is magic! */
#define gbArray(Type) Type *
#ifndef GB_ARRAY_GROW_FORMULA
#define GB_ARRAY_GROW_FORMULA(x) (2*(x) + 8)
#endif
GB_STATIC_ASSERT(GB_ARRAY_GROW_FORMULA(0) > 0);
#define GB_ARRAY_HEADER(x) (cast(gbArrayHeader *)(x) - 1)
#define gb_array_allocator(x) (GB_ARRAY_HEADER(x)->allocator)
#define gb_array_count(x) (GB_ARRAY_HEADER(x)->count)
#define gb_array_capacity(x) (GB_ARRAY_HEADER(x)->capacity)
/* TODO(bill): Have proper alignment! */
#define gb_array_init(x, allocator_) do { \
void **gb__array_ = cast(void **)&(x); \
gbArrayHeader *gb__ah = cast(gbArrayHeader *)gb_alloc(allocator_, gb_size_of(gbArrayHeader)+gb_size_of(*(x))*GB_ARRAY_GROW_FORMULA(0)); \
gb__ah->allocator = allocator_; \
gb__ah->count = gb__ah->capacity = 0; \
*gb__array_ = cast(void *)(gb__ah+1); \
} while (0)
#define gb_array_free(x) do { \
gbArrayHeader *gb__ah = GB_ARRAY_HEADER(x); \
gb_free(gb__ah->allocator, gb__ah); \
} while (0)
#define gb_array_set_capacity(x, capacity) do { \
if (x) { \
void **gb__array_ = cast(void **)&(x); \
*gb__array_ = gb__array_set_capacity((x), (capacity), gb_size_of(*(x))); \
} \
} while (0)
/* NOTE(bill): Do not use the thing below directly, use the macro */
GB_DEF void *gb__array_set_capacity(void *array, isize capacity, isize element_size);
/* TODO(bill): Decide on a decent growing formula for gbArray */
#define gb_array_grow(x, min_capacity) do { \
isize new_capacity = GB_ARRAY_GROW_FORMULA(gb_array_capacity(x)); \
if (new_capacity < (min_capacity)) \
new_capacity = (min_capacity); \
gb_array_set_capacity(x, new_capacity); \
} while (0)
#define gb_array_append(x, item) do { \
if (gb_array_capacity(x) < gb_array_count(x)+1) \
gb_array_grow(x, 0); \
(x)[gb_array_count(x)++] = (item); \
} while (0)
#define gb_array_appendv(x, items, item_count) do { \
gbArrayHeader *gb__ah = GB_ARRAY_HEADER(x); \
GB_ASSERT(gb_size_of((items)[0]) == gb_size_of((x)[0])); \
if (gb__ah->capacity < gb__ah->count+(item_count)) \
gb_array_grow(x, gb__ah->count+(item_count)); \
gb_memcopy(&(x)[gb__ah->count], (items), gb_size_of((x)[0])*(item_count));\
gb__ah->count += (item_count); \
} while (0)
#define gb_array_pop(x) do { GB_ASSERT(GB_ARRAY_HEADER(x)->count > 0); GB_ARRAY_HEADER(x)->count--; } while (0)
#define gb_array_clear(x) do { GB_ARRAY_HEADER(x)->count = 0; } while (0)
#define gb_array_resize(x, new_count) do { \
if (GB_ARRAY_HEADER(x)->capacity < (new_count)) \
gb_array_grow(x, (new_count)); \
GB_ARRAY_HEADER(x)->count = (new_count); \
} while (0)
#define gb_array_reserve(x, new_capacity) do { \
if (GB_ARRAY_HEADER(x)->capacity < (new_capacity)) \
gb_array_set_capacity(x, new_capacity); \
} while (0)
/***************************************************************
*
* Hashing Functions
*
*/
GB_EXTERN u32 gb_adler32(void const *data, isize len);
GB_EXTERN u32 gb_crc32(void const *data, isize len);
GB_EXTERN u64 gb_crc64(void const *data, isize len);
GB_EXTERN u32 gb_fnv32 (void const *data, isize len);
GB_EXTERN u64 gb_fnv64 (void const *data, isize len);
GB_EXTERN u32 gb_fnv32a(void const *data, isize len);
GB_EXTERN u64 gb_fnv64a(void const *data, isize len);
/* NOTE(bill): Default seed of 0x9747b28c */
/* NOTE(bill): I prefer using murmur64 for most hashes */
GB_EXTERN u32 gb_murmur32(void const *data, isize len);
GB_EXTERN u64 gb_murmur64(void const *data, isize len);
GB_EXTERN u32 gb_murmur32_seed(void const *data, isize len, u32 seed);
GB_EXTERN u64 gb_murmur64_seed(void const *data, isize len, u64 seed);
/***************************************************************
*
* Hash Table - Still experimental!
*
*/
/* NOTE(bill): Hash table for POD types with a u64 key
* The hash table stores an void * for the data. This is because I don't want to macro hell to get this to work
* With generic data types.
* TODO(bill): Should the hash table store an isize or a void *? Which is more useful for the user?
*/
typedef struct gbHashTableEntry {
u64 key;
isize next;
void *value;
} gbHashTableEntry;
typedef struct gbHashTable {
gbArray(isize) hashes;
gbArray(gbHashTableEntry) entries;
} gbHashTable;
/* TODO(bill): I'm not very sure on the naming of these procedures and if they should be named better. */
GB_DEF void gb_hash_table_init (gbHashTable *h, gbAllocator a);
GB_DEF void gb_hash_table_free (gbHashTable *h);
GB_DEF void gb_hash_table_clear (gbHashTable *h);
GB_DEF b32 gb_hash_table_has (gbHashTable const *h, u64 key);
GB_DEF void *gb_hash_table_get (gbHashTable const *h, u64 key, void *default_value);
GB_DEF void gb_hash_table_set (gbHashTable *h, u64 key, void *value);
GB_DEF void gb_hash_table_remove (gbHashTable *h, u64 key);
GB_DEF void gb_hash_table_reserve(gbHashTable *h, isize capacity);
GB_DEF void gb_multi_hash_table_get (gbHashTable const *h, u64 key, void **values, isize count);
GB_DEF isize gb_multi_hash_table_count (gbHashTable const *h, u64 key);
GB_DEF void gb_multi_hash_table_insert (gbHashTable *h, u64 key, void *value);
GB_DEF void gb_multi_hash_table_remove_entry(gbHashTable *h, gbHashTableEntry const *e);
GB_DEF void gb_multi_hash_table_remove_all (gbHashTable *h, u64 key);
GB_DEF gbHashTableEntry const *gb_multi_hash_table_find_first_entry(gbHashTable const *h, u64 key);
GB_DEF gbHashTableEntry const *gb_multi_hash_table_find_next_entry (gbHashTable const *h, gbHashTableEntry const *e);
/***************************************************************
*
* File Handling
*
*/
typedef u64 gbFileTime;
typedef enum gbFileAccess {
GB_FILE_ACCESS_READ = 1,
GB_FILE_ACCESS_WRITE = 2
} gbFileAccess;
typedef enum gbFileType {
GB_FILE_TYPE_UNKNOWN,
GB_FILE_TYPE_FILE,
GB_FILE_TYPE_DIRECTORY,
GB_FILE_TYPE_COUNT
} gbFileType;
typedef struct gbFile {
void *handle; /* File to fread/fwrite */
char *path;
i64 size;
b32 is_open;
gbFileAccess access;
gbFileType type;
gbFileTime last_write_time;
} gbFile;
typedef struct gbFileContents {
void *data;
isize size;
} gbFileContents;
GB_DEF b32 gb_file_create (gbFile *file, char const *filepath, ...) GB_PRINTF_ARGS(2); /* TODO(bill): Give file permissions */
GB_DEF b32 gb_file_open (gbFile *file, char const *filepath, ...) GB_PRINTF_ARGS(2);
GB_DEF b32 gb_file_close (gbFile *file);
GB_DEF b32 gb_file_read_at (gbFile *file, void *buffer, isize size, i64 offset);
GB_DEF b32 gb_file_write_at (gbFile *file, void const *buffer, isize size, i64 offset);
GB_DEF i64 gb_file_size (gbFile *file);
GB_DEF b32 gb_file_has_changed(gbFile *file);
GB_DEF gbFileTime gb_file_last_write_time(char const *filepath, ...) GB_PRINTF_ARGS(1);
GB_DEF b32 gb_file_copy(char const *existing_filename, char const *new_filename, b32 fail_if_exists);
GB_DEF b32 gb_file_move(char const *existing_filename, char const *new_filename);
GB_DEF gbFileContents gb_file_read_contents(gbAllocator a, b32 zero_terminate, char const *filepath, ...) GB_PRINTF_ARGS(3);
#ifndef GB_PATH_SEPARATOR
#if defined(GB_SYSTEM_WINDOWS)
#define GB_PATH_SEPARATOR '\\'
#else
#define GB_PATH_SEPARATOR '/'
#endif
#endif
GB_DEF b32 gb_path_is_absolute(char const *path);
GB_DEF b32 gb_path_is_relative(char const *path);
GB_DEF b32 gb_path_is_root (char const *path);
GB_DEF char const *gb_path_base_name (char const *path);
GB_DEF char const *gb_path_extension (char const *path);
/***************************************************************
*
* DLL Handling
*
*/
typedef void *gbDllHandle;
typedef void (*gbDllProc)(void);
GB_DEF gbDllHandle gb_dll_load (char const *filepath, ...) GB_PRINTF_ARGS(1);
GB_DEF void gb_dll_unload (gbDllHandle dll);
GB_DEF gbDllProc gb_dll_proc_address(gbDllHandle dll, char const *proc_name);
/***************************************************************
*
* Time
*
*/
GB_DEF u64 gb_rdtsc (void);
GB_DEF f64 gb_time_now(void); /* NOTE(bill): This is only for relative time e.g. game loops */
GB_DEF void gb_sleep_ms(u32 ms);
/***************************************************************
*
* Miscellany
*
*/
GB_DEF void gb_exit(u32 code);
GB_DEF void gb_yield(void);
GB_DEF void gb_set_env(char const *name, char const *value);
GB_DEF void gb_unset_env(char const *name);
GB_DEF i32 gb_chdir(char const *path);
GB_DEF void gb_get_working_cmd(char *buffer, isize len);
GB_DEF u16 gb_endian_swap16(u16 i);
GB_DEF u32 gb_endian_swap32(u32 i);
GB_DEF u64 gb_endian_swap64(u64 i);
#if !defined(GB_NO_COLOUR_TYPE)
/***************************************************************
*
* Colour Type
* It's quite useful
* TODO(bill): Does this need to be in this library?
* Can I remove the anonymous struct extension?
*/
#if defined(_MSC_VER)
#pragma warning(push)
#pragma warning(disable:4201)
#endif
typedef union gbColour {
u32 rgba; /* NOTE(bill): 0xaabbggrr */
struct { u8 r, g, b, a; };
u8 e[4];
} gbColour;
GB_STATIC_ASSERT(gb_size_of(gbColour) == gb_size_of(u32));
#if defined(_MSC_VER)
#pragma warning(pop)
#endif
GB_DEF gbColour gb_colour(f32 r, f32 g, f32 b, f32 a);
gb_global gbColour const GB_COLOUR_WHITE = {0xffffffff};
gb_global gbColour const GB_COLOUR_GREY = {0xff808080};
gb_global gbColour const GB_COLOUR_BLACK = {0xff000000};
gb_global gbColour const GB_COLOUR_RED = {0xff0000ff};
gb_global gbColour const GB_COLOUR_ORANGE = {0xff0099ff};
gb_global gbColour const GB_COLOUR_YELLOW = {0xff00ffff};
gb_global gbColour const GB_COLOUR_GREEN = {0xff00ff00};
gb_global gbColour const GB_COLOUR_CYAN = {0xffffff00};
gb_global gbColour const GB_COLOUR_BLUE = {0xffff0000};
gb_global gbColour const GB_COLOUR_VIOLET = {0xffff007f};
gb_global gbColour const GB_COLOUR_MAGENTA = {0xffff00ff};
#endif /* !defined(GB_NO_COLOUR_TYPE) */
#if defined(__cplusplus)
}
#endif
#endif /* GB_INCLUDE_GB_H */
/***************************************************************
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
* Implementation
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
*
***************************************************************/
#if defined(GB_IMPLEMENTATION) && !defined(GB_IMPLEMENTATION_DONE)
#define GB_IMPLEMENTATION_DONE
#if defined(__cplusplus)
extern "C" {
#endif
#if 0
/* TODO(bill): Should I do this instead of windows.h or is it even really needed? */
#if defined(GB_SYSTEM_WINDOWS)
/*
* Ginger Bill's Mini Windows.h
* To avoid including windows.h
*
* NOTE(bill): These definitions aren't exactly the same so if you want to include windows.h,
* make sure you do it before this!
*/
#include <process.h>
#ifndef _WINDOWS_ /* check windows.h guard */
#define INFINITE 0xffffffff
#define INVALID_HANDLE_VALUE cast(void *)(-1)
#define EXCEPTION_EXECUTE_HANDLER 1
#if defined(GB_ARCH_64_BIT)
typedef u64 ULONG_PTR;
#else
typedef u32 ULONG_PTR;
#endif
typedef union _ULARGE_INTEGER {
struct {
DWORD LowPart;
DWORD HighPart;
};
struct {
DWORD LowPart;
DWORD HighPart;
} u;
DWORD long QuadPart;
} ULARGE_INTEGER;
typedef union _LARGE_INTEGER {
struct {
DWORD LowPart;
long HighPart;
};
struct {
DWORD LowPart;
long HighPart;
} u;
long long QuadPart;
} LARGE_INTEGER;
typedef enum _GET_FILEEX_INFO_LEVELS {
GetFileExInfoStandard,
GetFileExMaxInfoLevel
} GET_FILEEX_INFO_LEVELS;
typedef struct _FILETIME {
DWORD dwLowDateTime;
DWORD dwHighDateTime;
} FILETIME;
typedef struct _WIN32_FILE_ATTRIBUTE_DATA {
DWORD dwFileAttributes;
FILETIME ftCreationTime;
FILETIME ftLastAccessTime;
FILETIME ftLastWriteTime;
DWORD nFileSizeHigh;
DWORD nFileSizeLow;
} WIN32_FILE_ATTRIBUTE_DATA;
typedef DWORD (__stdcall *gb__Win32ThreadProc)(void *arg);
GB_DLL_IMPORT b32 __stdcall CloseHandle(void *);
GB_DLL_IMPORT void __stdcall Sleep(DWORD);
GB_DLL_IMPORT void * __stdcall CreateSemaphoreA(void *sec, long,long,char*);
GB_DLL_IMPORT DWORD __stdcall WaitForSingleObject(void *, DWORD);
GB_DLL_IMPORT b32 __stdcall ReleaseSemaphore(void *, long, long *);
GB_DLL_IMPORT void * __stdcall CreateThread(void *, size_t, gb__Win32ThreadProc, void *, DWORD, DWORD *);
GB_DLL_IMPORT b32 __stdcall TerminateThread(void *, DWORD);
GB_DLL_IMPORT DWORD __stdcall GetCurrentThreadId(void);
GB_DLL_IMPORT DWORD __stdcall GetThreadId(void *);
GB_DLL_IMPORT void __stdcall RaiseException(DWORD, DWORD, DWORD, ULONG_PTR const *);
GB_DLL_IMPORT void * __stdcall VirtualAlloc(void *base_address, size_t size, DWORD type, DWORD protect);
GB_DLL_IMPORT b32 __stdcall VirtualFree(void *base_address, size_t size, DWORD freetype);
GB_DLL_IMPORT b32 __stdcall GetFileAttributesExA(char const *filename, GET_FILEEX_INFO_LEVELS info_level_id, void *file_info);
GB_DLL_IMPORT b32 __stdcall CopyFileA(char const *existing_filename, char const *new_filename, b32 fail_if_exists);
GB_DLL_IMPORT b32 __stdcall MoveFileA(char const *existing_filename, char const *new_filename);
GB_DLL_IMPORT void * __stdcall LoadLibraryA (char const *filename);
GB_DLL_IMPORT void __stdcall FreeLibrary (void *dll);
GB_DLL_IMPORT gbDllProc __stdcall GetProcAddress(void *dll, char const *proc_name);
GB_DLL_IMPORT void __stdcall QueryPerformanceFrequency(LARGE_INTEGER *freq);
GB_DLL_IMPORT void __stdcall QueryPerformanceCounter (LARGE_INTEGER *counter);
GB_DLL_IMPORT void __stdcall ExitProcess(unsigned int exit_code);
GB_DLL_IMPORT void __stdcall SetEnvironmentVariableA(char const *name, char const *value);
GB_DLL_IMPORT void __stdcall _getcwd(char *, i32);
GB_DLL_IMPORT i32 __stdcall _chdir (char const *path);
#endif /* _WINDOWS_ */
#endif
#endif
#if defined(__GCC__) || defined(__GNUC__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wattributes"
#endif
i32
gb_printf(char const *fmt, ...)
{
i32 res;
va_list va;
va_start(va, fmt);
res = gb_fprintf_va(stdout, fmt, va);
va_end(va);
return res;
}
i32
gb_fprintf(FILE *f, char const *fmt, ...)
{
i32 res;
va_list va;
va_start(va, fmt);
res = gb_fprintf_va(f, fmt, va);
va_end(va);
return res;
}
char *
gb_sprintf(char const *fmt, ...)
{
va_list va;
char *str;
va_start(va, fmt);
str = gb_sprintf_va(fmt, va);
va_end(va);
return str;
}
i32
gb_snprintf(char *str, isize n, char const *fmt, ...)
{
i32 res;
va_list va;
va_start(va, fmt);
res = gb_snprintf_va(str, n, fmt, va);
va_end(va);
return res;
}
gb_inline i32 gb_printf_va (char const *fmt, va_list va) { return gb_fprintf_va(stdout, fmt, va); }
gb_inline i32 gb_fprintf_va(FILE *f, char const *fmt, va_list va) { return vfprintf(f, fmt, va); }
gb_inline char *
gb_sprintf_va(char const *fmt, va_list va)
{
gb_local_persist char buffer[1024];
gb_snprintf_va(buffer, gb_size_of(buffer), fmt, va);
return buffer;
}
gb_inline i32
gb_snprintf_va(char *str, isize n, char const *fmt, va_list va)
{
i32 res;
#if defined(_WIN32)
res = _vsnprintf(str, n, fmt, va);
#else
res = vsnprintf(str, n, fmt, va);
#endif
if (n) str[n-1] = 0;
/* NOTE(bill): Unix returns length output would require, Windows returns negative when truncated. */
return (res >= n || res < 0) ? -1 : res;
}
gb_inline i32 gb_println(char const *str) { return gb_fprintln(stdout, str); }
gb_inline i32
gb_fprintln(FILE *f, char const *str)
{
i32 res;
res = gb_fprintf(f, "%s", str);
gb_fprintf(f, "\n");
res++;
return res;
}
void
gb_assert_handler(char const *condition, char const *file, i32 line, char const *msg)
{
gb_fprintf(stderr, "%s:%d: Assert Failure: ", file, line);
if (condition)
gb_fprintf(stderr, "`%s` ", condition);
if (msg)
gb_fprintf(stderr, "%s", msg);
gb_fprintf(stderr, "\n");
}
gb_inline isize
gb_is_power_of_two(isize x)
{
return (x != 0) && !(x & (x-1));
}
gb_inline void *
gb_align_forward(void *ptr, isize alignment)
{
uintptr p;
isize modulo;
GB_ASSERT(gb_is_power_of_two(alignment));
p = cast(uintptr)ptr;
modulo = p & (alignment-1);
if (modulo) p += (alignment - modulo);
return cast(void *)p;
}
gb_inline void * gb_pointer_add (void *ptr, isize bytes) { return cast(void *)(cast(u8 *)ptr + bytes); }
gb_inline void * gb_pointer_sub (void *ptr, isize bytes) { return cast(void *)(cast(u8 *)ptr - bytes); }
gb_inline void const *gb_pointer_add_const(void const *ptr, isize bytes) { return cast(void const *)(cast(u8 const *)ptr + bytes); }
gb_inline void const *gb_pointer_sub_const(void const *ptr, isize bytes) { return cast(void const *)(cast(u8 const *)ptr - bytes); }
gb_inline isize gb_pointer_diff (void const *begin, void const *end) { return cast(isize)(cast(u8 const *)end - cast(u8 const *)begin); }
gb_inline void gb_zero_size(void *ptr, isize size) { gb_memset(ptr, 0, size); }
gb_inline void *gb_memcopy(void *gb_restrict dest, void const *gb_restrict source, isize size) { return memcpy (dest, source, size); }
gb_inline void *gb_memmove(void *dest, void const *source, isize size) { return memmove(dest, source, size); }
gb_inline void *gb_memset (void *data, u8 byte_value, isize size) { return memset (data, byte_value, size); }
gb_inline void *gb_alloc_align (gbAllocator a, isize size, isize alignment) { return a.proc(a.data, GB_ALLOCATION_ALLOC, size, alignment, NULL, 0, 0); }
gb_inline void *gb_alloc (gbAllocator a, isize size) { return gb_alloc_align(a, size, GB_DEFAULT_MEMORY_ALIGNMENT); }
gb_inline void gb_free (gbAllocator a, void *ptr) { a.proc(a.data, GB_ALLOCATION_FREE, 0, 0, ptr, 0, 0); }
gb_inline void gb_free_all (gbAllocator a) { a.proc(a.data, GB_ALLOCATION_FREE_ALL, 0, 0, NULL, 0, 0); }
gb_inline void *gb_resize (gbAllocator a, void *ptr, isize old_size, isize new_size) { return gb_resize_align(a, ptr, old_size, new_size, GB_DEFAULT_MEMORY_ALIGNMENT); }
gb_inline void *gb_resize_align(gbAllocator a, void *ptr, isize old_size, isize new_size, isize alignment) { return a.proc(a.data, GB_ALLOCATION_RESIZE, new_size, alignment, ptr, old_size, 0); }
gb_inline void *gb_alloc_copy (gbAllocator a, void const *src, isize size) { return gb_memcopy(gb_alloc(a, size), src, size); }
gb_inline void *gb_alloc_copy_align(gbAllocator a, void const *src, isize size, isize alignment) { return gb_memcopy(gb_alloc_align(a, size, alignment), src, size); }
gb_inline char *
gb_alloc_str(gbAllocator a, char const *str)
{
char *result;
isize len = gb_strlen(str);
result = cast(char *)gb_alloc_copy(a, str, len+1);
result[len] = '\0';
return result;
}
gb_inline void *
gb_default_resize_align(gbAllocator a, void *old_memory, isize old_size, isize new_size, isize alignment)
{
if (!old_memory) return gb_alloc_align(a, new_size, alignment);
if (new_size < old_size)
new_size = old_size;
if (old_size == new_size) {
return old_memory;
} else {
void *new_memory = gb_alloc_align(a, new_size, alignment);
if (!new_memory) return NULL;
gb_memmove(new_memory, old_memory, gb_min(new_size, old_size));
gb_free(a, old_memory);
return new_memory;
}
}
/***************************************************************
*
* Concurrency
*
*/
#if defined(_MSC_VER) && !defined(__clang__)
gb_inline i32 gb_atomic32_load (gbAtomic32 const volatile *a) { return a->value; }
gb_inline void gb_atomic32_store(gbAtomic32 volatile *a, i32 value) { a->value = value; }
gb_inline i32
gb_atomic32_compare_exchange(gbAtomic32 volatile *a, i32 expected, i32 desired)
{
return _InterlockedCompareExchange(cast(long volatile *)a, desired, expected);
}
gb_inline i32
gb_atomic32_exchanged(gbAtomic32 volatile *a, i32 desired)
{
return _InterlockedExchange(cast(long volatile *)a, desired);
}
gb_inline i32
gb_atomic32_fetch_add(gbAtomic32 volatile *a, i32 operand)
{
return _InterlockedExchangeAdd(cast(long volatile *)a, operand);
}
gb_inline i32
gb_atomic32_fetch_and(gbAtomic32 volatile *a, i32 operand)
{
return _InterlockedAnd(cast(long volatile *)a, operand);
}
gb_inline i32
gb_atomic32_fetch_or(gbAtomic32 volatile *a, i32 operand)
{
return _InterlockedOr(cast(long volatile *)a, operand);
}
gb_inline i64
gb_atomic64_load(gbAtomic64 const volatile *a)
{
#if defined(GB_ARCH_64_BIT)
return a->value;
#else
/* NOTE(bill): The most compatible way to get an atomic 64-bit load on x86 is with cmpxchg8b */
i64 result;
__asm {
mov esi, a;
mov ebx, eax;
mov ecx, edx;
lock cmpxchg8b [esi];
mov dword ptr result, eax;
mov dword ptr result[4], edx;
}
return result;
#endif
}
gb_inline void
gb_atomic64_store(gbAtomic64 volatile *a, i64 value)
{
#if defined(GB_ARCH_64_BIT)
a->value = value;
#else
/* NOTE(bill): The most compatible way to get an atomic 64-bit store on x86 is with cmpxchg8b */
__asm {
mov esi, a;
mov ebx, dword ptr value;
mov ecx, dword ptr value[4];
retry:
cmpxchg8b [esi];
jne retry;
}
#endif
}
gb_inline i64
gb_atomic64_compare_exchange(gbAtomic64 volatile *a, i64 expected, i64 desired)
{
return _InterlockedCompareExchange64(cast(i64 volatile *)a, desired, expected);
}
gb_inline i64
gb_atomic64_exchanged(gbAtomic64 volatile *a, i64 desired)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedExchange64(cast(i64 volatile *)a, desired);
#else
i64 expected = a->value;
for (;;) {
i64 original = _InterlockedCompareExchange64(cast(i64 volatile *)a, desired, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_add(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedExchangeAdd64(cast(i64 volatile *)a, operand);
#else
i64 expected = a->value;
for (;;) {
i64 original = _InterlockedCompareExchange64(cast(i64 volatile *)a, expected + operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_and(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedAnd64(cast(i64 volatile *)a, operand);
#else
i64 expected = a->value;
for (;;) {
i64 original = _InterlockedCompareExchange64(cast(i64 volatile *)a, expected & operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_or(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
return _InterlockedAnd64(cast(i64 volatile *)a, operand);
#else
i64 expected = a->value;
for (;;) {
i64 original = _InterlockedCompareExchange64(cast(i64 volatile *)a, expected | operand, expected);
if (original == expected)
return original;
expected = original;
}
#endif
}
#else /* GCC */
gb_inline i32 gb_atomic32_load (gbAtomic32 const volatile *a) { return a->value; }
gb_inline void gb_atomic32_store(gbAtomic32 volatile *a, i32 value) { a->value = value; }
gb_inline i32
gb_atomic32_compare_exchange(gbAtomic32 volatile *a, i32 expected, i32 desired)
{
i32 original;
__asm__ volatile(
"lock; cmpxchgl %2, %1"
: "=a"(original), "+m"(a->value)
: "q"(desired), "0"(expected)
);
return original;
}
gb_inline i32
gb_atomic32_exchanged(gbAtomic32 volatile *a, i32 desired)
{
/* NOTE(bill): No lock prefix is necessary for xchgl */
i32 original;
__asm__ volatile(
"xchgl %0, %1"
: "=r"(original), "+m"(a->value)
: "0"(desired)
);
return original;
}
gb_inline i32
gb_atomic32_fetch_add(gbAtomic32 volatile *a, i32 operand)
{
i32 original;
__asm__ volatile(
"lock; xaddl %0, %1"
: "=r"(original), "+m"(a->value)
: "0"(operand)
);
return original;
}
gb_inline i32
gb_atomic32_fetch_and(gbAtomic32 volatile *a, i32 operand)
{
i32 original;
i32 tmp;
__asm__ volatile(
"1: movl %1, %0\n"
" movl %0, %2\n"
" andl %3, %2\n"
" lock; cmpxchgl %2, %1\n"
" jne 1b"
: "=&a"(original), "+m"(a->value), "=&r"(tmp)
: "r"(operand)
);
return original;
}
gb_inline i32
gb_atomic32_fetch_or(gbAtomic32 volatile *a, i32 operand)
{
i32 original;
i32 temp;
__asm__ volatile(
"1: movl %1, %0\n"
" movl %0, %2\n"
" orl %3, %2\n"
" lock; cmpxchgl %2, %1\n"
" jne 1b"
: "=&a"(original), "+m"(a->value), "=&r"(temp)
: "r"(operand)
);
return original;
}
gb_inline i64
gb_atomic64_load(gbAtomic64 const volatile *a)
{
#if defined(GB_ARCH_64_BIT)
return a->value;
#else
i64 original;
__asm__ volatile(
"movl %%ebx, %%eax\n"
"movl %%ecx, %%edx\n"
"lock; cmpxchg8b %1"
: "=&A"(original)
: "m"(a->value)
);
return original;
#endif
}
gb_inline void
gb_atomic64_store(gbAtomic64 volatile *a, i64 value)
{
#if defined(GB_ARCH_64_BIT)
a->value = value;
#else
i64 expected = a->value;
__asm__ volatile(
"1: cmpxchg8b %0\n"
" jne 1b"
: "=m"(a->value)
: "b"((i32)value), "c"((i32)(value >> 32)), "A"(expected)
);
#endif
}
gb_inline i64
gb_atomic64_compare_exchange(gbAtomic64 volatile *a, i64 expected, i64 desired)
{
#if defined(GB_ARCH_64_BIT)
i64 original;
__asm__ volatile(
"lock; cmpxchgq %2, %1"
: "=a"(original), "+m"(a->value)
: "q"(desired), "0"(expected)
);
return original;
#else
i64 original;
__asm__ volatile(
"lock; cmpxchg8b %1"
: "=A"(original), "+m"(a->value)
: "b"((i32)desired), "c"((i32)(desired >> 32)), "0"(expected)
);
return original;
#endif
}
gb_inline i64
gb_atomic64_exchanged(gbAtomic64 volatile *a, i64 desired)
{
#if defined(GB_ARCH_64_BIT)
i64 original;
__asm__ volatile(
"xchgq %0, %1"
: "=r"(original), "+m"(a->value)
: "0"(desired)
);
return original;
#else
i64 original = a->value;
for (;;) {
i64 previous = gb_atomic64_compare_exchange(a, original, desired);
if (original == previous)
return original;
original = previous;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_add(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
i64 original;
__asm__ volatile(
"lock; xaddq %0, %1"
: "=r"(original), "+m"(a->value)
: "0"(operand)
);
return original;
#else
for (;;) {
i64 original = a->value;
if (gb_atomic64_compare_exchange(a, original, original + operand) == original)
return original;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_and(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
i64 original;
i64 tmp;
__asm__ volatile(
"1: movq %1, %0\n"
" movq %0, %2\n"
" andq %3, %2\n"
" lock; cmpxchgq %2, %1\n"
" jne 1b"
: "=&a"(original), "+m"(a->value), "=&r"(tmp)
: "r"(operand)
);
return original;
#else
for (;;) {
i64 original = a->value;
if (gb_atomic64_compare_exchange(a, original, original & operand) == original)
return original;
}
#endif
}
gb_inline i64
gb_atomic64_fetch_or(gbAtomic64 volatile *a, i64 operand)
{
#if defined(GB_ARCH_64_BIT)
i64 original;
i64 temp;
__asm__ volatile(
"1: movq %1, %0\n"
" movq %0, %2\n"
" orq %3, %2\n"
" lock; cmpxchgq %2, %1\n"
" jne 1b"
: "=&a"(original), "+m"(a->value), "=&r"(temp)
: "r"(operand)
);
return original;
#else
for (;;) {
i64 original = a->value;
if (gb_atomic64_compare_exchange(a, original, original | operand) == original)
return original;
}
#endif
}
#endif
#if defined(GB_SYSTEM_WINDOWS)
gb_inline void
gb_mutex_init(gbMutex *m)
{
gb_atomic32_store(&m->counter, 0);
m->win32_semaphore_handle = CreateSemaphoreA(NULL, 0, 1, NULL);
}
gb_inline void
gb_mutex_destroy(gbMutex *m)
{
CloseHandle(m->win32_semaphore_handle);
}
gb_inline void
gb_mutex_lock(gbMutex *m)
{
if (gb_atomic32_fetch_add(&m->counter, 1) > 1)
WaitForSingleObject(m->win32_semaphore_handle, INFINITE);
}
gb_inline b32
gb_mutex_try_lock(gbMutex *m)
{
i32 result = gb_atomic32_compare_exchange(&m->counter, 1, 0);
return (result == 0);
}
gb_inline void
gb_mutex_unlock(gbMutex *m)
{
if (gb_atomic32_fetch_add(&m->counter, -1) > 0)
ReleaseSemaphore(m->win32_semaphore_handle, 1, NULL);
}
#else
gb_inline void
gb_mutex_init(gbMutex *m)
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
#if defined (PTHREAD_MUTEX_RECURSIVE) || defined(__FreeBSD__)
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
#else
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE_NP);
#endif
pthread_mutex_init(&m->posix_handle, &attr);
}
gb_inline void
gb_mutex_destroy(gbMutex *m)
{
pthread_mutex_destroy(&m->posix_handle);
}
gb_inline void
gb_mutex_lock(gbMutex *m)
{
pthread_mutex_lock(&m->posix_handle);
}
gb_inline b32
gb_mutex_try_lock(gbMutex *m)
{
return pthread_mutex_trylock(&m->posix_handle) == 0;
}
gb_inline void
gb_mutex_unlock(gbMutex *m)
{
pthread_mutex_unlock(&m->posix_handle);
}
#endif
#if defined(GB_SYSTEM_WINDOWS)
gb_inline void
gb_semaphore_init(gbSemaphore *s)
{
s->win32_handle = CreateSemaphoreA(NULL, 0, I32_MAX, NULL);
GB_ASSERT_MSG(s->win32_handle != NULL, "CreateSemaphore: GetLastError");
}
gb_inline void
gb_semaphore_destroy(gbSemaphore *s)
{
b32 err = CloseHandle(s->win32_handle);
GB_ASSERT_MSG(err != 0, "CloseHandle: GetLastError");
}
gb_inline void
gb_semaphore_post(gbSemaphore *s, i32 count)
{
b32 err = ReleaseSemaphore(s->win32_handle, count, NULL);
GB_ASSERT_MSG(err != 0, "ReleaseSemaphore: GetLastError");
}
gb_inline void
gb_semaphore_wait(gbSemaphore *s)
{
DWORD result = WaitForSingleObject(s->win32_handle, INFINITE);
GB_ASSERT_MSG(result == 0, "WaitForSingleObject: GetLastError");
}
#else
gb_inline void
gb_semaphore_init(gbSemaphore *s)
{
int err = pthread_cond_init(&s->cond, NULL);
GB_ASSERT(err == 0);
gb_mutex_init(&s->mutex);
}
gb_inline void
gb_semaphore_destroy(gbSemaphore *s)
{
int err = pthread_cond_destroy(&s->cond);
GB_ASSERT(err == 0);
gb_mutex_destroy(&s->mutex);
}
gb_inline void
gb_semaphore_post(gbSemaphore *s, i32 count)
{
i32 i;
gb_mutex_lock(&s->mutex);
for (i = 0; i < count; i++)
pthread_cond_signal(&s->cond);
s->count += count;
gb_mutex_unlock(&s->mutex);
}
gb_inline void
gb_semaphore_wait(gbSemaphore *s)
{
gb_mutex_lock(&s->mutex);
while (s->count <= 0)
pthread_cond_wait(&s->cond, &s->mutex.posix_handle);
s->count--;
gb_mutex_unlock(&s->mutex);
}
#endif
void
gb_thread_init(gbThread *t)
{
gb_zero_struct(t);
#if defined(GB_SYSTEM_WINDOWS)
t->win32_handle = INVALID_HANDLE_VALUE;
#else
t->posix_handle = 0;
#endif
gb_semaphore_init(&t->semaphore);
}
void
gb_thread_destory(gbThread *t)
{
if (t->is_running) gb_thread_join(t);
gb_semaphore_destroy(&t->semaphore);
}
gb_inline void
gb__thread_run(gbThread *t)
{
gb_semaphore_post(&t->semaphore, 1);
t->proc(t->data);
}
#if defined(GB_SYSTEM_WINDOWS)
gb_inline DWORD __stdcall gb__thread_proc(void *arg) { gb__thread_run(cast(gbThread *)arg); return 0; }
#else
gb_inline void * gb__thread_proc(void *arg) { gb__thread_run(cast(gbThread *)arg); return NULL; }
#endif
gb_inline void gb_thread_start(gbThread *t, gbThreadProc *proc, void *data) { gb_thread_start_with_stack(t, proc, data, 0); }
gb_inline void
gb_thread_start_with_stack(gbThread *t, gbThreadProc *proc, void *data, isize stack_size)
{
GB_ASSERT(!t->is_running);
GB_ASSERT(proc != NULL);
t->proc = proc;
t->data = data;
t->stack_size = stack_size;
#if defined(GB_SYSTEM_WINDOWS)
t->win32_handle = CreateThread(NULL, stack_size, gb__thread_proc, t, 0, NULL);
GB_ASSERT_MSG(t->win32_handle != NULL, "CreateThread: GetLastError");
#else
{
pthread_attr_t attr;
pthread_attr_init(&attr);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
if (stack_size != 0)
pthread_attr_setstacksize(&attr, stack_size);
pthread_create(&t->posix_handle, &attr, gb__thread_proc, t);
pthread_attr_destroy(&attr);
}
#endif
t->is_running = true;
gb_semaphore_wait(&t->semaphore);
}
gb_inline void
gb_thread_join(gbThread *t)
{
if (!t->is_running) return;
#if defined(GB_SYSTEM_WINDOWS)
WaitForSingleObject(t->win32_handle, INFINITE);
CloseHandle(t->win32_handle);
t->win32_handle = INVALID_HANDLE_VALUE;
#else
pthread_join(t->posix_handle, NULL);
t->posix_handle = 0;
#endif
t->is_running = false;
}
gb_inline b32 gb_thread_is_running(gbThread const *t) { return t->is_running != 0; }
gb_inline u32
gb_thread_current_id(void)
{
u32 thread_id;
#if defined(GB_SYSTEM_WINDOWS)
thread_id = GetCurrentThreadId();
#elif defined(GB_SYSTEM_OSX) && defined(GB_ARCH_64_BIT)
__asm__("mov %%gs:0x00,%0" : "=r"(thread_id));
#elif defined(GB_ARCH_32_BIT)
__asm__("mov %%gs:0x08,%0" : "=r"(thread_id));
#elif defined(GB_ARCH_64_BIT)
__asm__("mov %%gs:0x10,%0" : "=r"(thread_id));
#else
#error Unsupported architecture for thread::current_id()
#endif
return thread_id;
}
void
gb_thread_set_name(gbThread *t, char const *name)
{
#if defined(_MSC_VER)
/* TODO(bill): Bloody Windows!!! */
#pragma pack(push, 8)
struct gbprivThreadName {
DWORD type;
char const *name;
DWORD id;
DWORD flags;
};
#pragma pack(pop)
struct gbprivThreadName tn;
tn.type = 0x1000;
tn.name = name;
tn.id = GetThreadId(t->win32_handle);
tn.flags = 0;
__try {
RaiseException(0x406d1388, 0, gb_size_of(tn)/4, cast(ULONG_PTR *)&tn);
} __except(EXCEPTION_EXECUTE_HANDLER) {
}
#elif defined(GB_SYSTEM_WINDOWS) && !defined(_MSC_VER)
/* TODO(bill): Set thread name for GCC/Clang on windows */
return;
#elif defined(GB_SYSTEM_OSX)
/* TODO(bill): Test if this works */
pthread_setname_np(name);
#else
/* TODO(bill): Test if this works */
pthread_setname_np(t->posix_handle, name);
#endif
}
gb_inline gbAllocator
gb_heap_allocator(void)
{
gbAllocator a;
a.proc = gb_heap_allocator_proc;
a.data = NULL;
return a;
}
GB_ALLOCATOR_PROC(gb_heap_allocator_proc)
{
/* TODO(bill): Throughly test! */
switch (type) {
case GB_ALLOCATION_ALLOC: {
isize total_size = size + alignment + gb_size_of(gbAllocationHeader);
void *ptr = malloc(total_size);
gbAllocationHeader *header = cast(gbAllocationHeader *)ptr;
ptr = gb_align_forward(header+1, alignment);
gb_allocation_header_fill(header, ptr, size);
return ptr;
} break;
case GB_ALLOCATION_FREE: {
free(gb_allocation_header(old_memory));
} break;
case GB_ALLOCATION_FREE_ALL:
break;
case GB_ALLOCATION_RESIZE: {
gbAllocator a = gb_heap_allocator();
return gb_default_resize_align(a, old_memory, old_size, size, alignment);
} break;
}
return NULL; /* NOTE(bill): Default return value */
}
/***************************************************************
*
* Virtual Memory
*
*/
#if defined(GB_SYSTEM_WINDOWS)
gb_inline gbVirtualMemory
gb_vm_alloc(void *addr, isize size)
{
gbVirtualMemory vm;
GB_ASSERT(size > 0);
vm.data = VirtualAlloc(addr, size,
0x00001000 | 0x00002000, /* MEM_COMMIT | MEM_RESERVE */
0x04 /* PAGE_READWRITE */);
vm.size = size;
return vm;
}
gb_inline void
gb_vm_free(gbVirtualMemory vm)
{
VirtualFree(vm.data, vm.size > 0 ? vm.size : 0, 0x8000);
}
gb_inline gbVirtualMemory
gb_vm_trim(gbVirtualMemory vm, isize lead_size, isize size)
{
gbVirtualMemory new_vm = {0};
void *ptr;
GB_ASSERT(vm.size >= lead_size + vm.size);
ptr = gb_pointer_add(vm.data, lead_size);
gb_vm_free(vm);
new_vm = gb_vm_alloc(ptr, size);
if (new_vm.data == ptr)
return new_vm;
if (new_vm.data)
gb_vm_free(new_vm);
return new_vm;
}
gb_inline b32
gb_vm_purge(gbVirtualMemory vm)
{
VirtualAlloc(vm.data, vm.size,
0x00080000, /* MEM_RESET */
0x04 /* PAGE_READWRITE */);
/* NOTE(bill): Can this really fail? */
return true;
}
#else
#error Implement Virtual Memory Procs
#endif
/***************************************************************
*
* Custom Allocation
*
*/
/*
* Arena Allocator
*/
gb_inline void
gb_arena_init_from_memory(gbArena *arena, void *start, isize size)
{
arena->backing.proc = NULL;
arena->backing.data = NULL;
arena->physical_start = start;
arena->total_size = size;
arena->total_allocated = 0;
arena->temp_count = 0;
}
gb_inline void
gb_arena_init_from_allocator(gbArena *arena, gbAllocator backing, isize size)
{
arena->backing = backing;
arena->physical_start = gb_alloc(backing, size); /* NOTE(bill): Uses default alignment */
arena->total_size = size;
arena->total_allocated = 0;
arena->temp_count = 0;
}
gb_inline void gb_arena_init_sub(gbArena *arena, gbArena *parent_arena, isize size) { gb_arena_init_from_allocator(arena, gb_arena_allocator(parent_arena), size); }
gb_inline void
gb_arena_free(gbArena *arena)
{
if (arena->backing.proc) {
gb_free(arena->backing, arena->physical_start);
arena->physical_start = NULL;
}
}
gb_inline isize
gb_arena_alignment_of(gbArena *arena, isize alignment)
{
isize alignment_offset, result_pointer, mask;
GB_ASSERT(gb_is_power_of_two(alignment));
alignment_offset = 0;
result_pointer = cast(isize)arena->physical_start + arena->total_allocated;
mask = alignment - 1;
if (result_pointer & mask)
alignment_offset = alignment - (result_pointer & mask);
return alignment_offset;
}
gb_inline isize
gb_arena_size_remaining(gbArena *arena, isize alignment)
{
isize result = arena->total_size - (arena->total_allocated + gb_arena_alignment_of(arena, alignment));
return result;
}
gb_inline void gb_arena_check(gbArena *arena) { GB_ASSERT(arena->temp_count == 0); }
gb_inline gbAllocator
gb_arena_allocator(gbArena *arena)
{
gbAllocator allocator;
allocator.proc = gb_arena_allocator_proc;
allocator.data = arena;
return allocator;
}
GB_ALLOCATOR_PROC(gb_arena_allocator_proc)
{
gbArena *arena = cast(gbArena *)allocator_data;
gb_unused(options);
gb_unused(old_size);
switch (type) {
case GB_ALLOCATION_ALLOC: {
void *ptr = NULL;
void *end = gb_pointer_add(arena->physical_start, arena->total_allocated);
isize total_size = size + alignment;
/* NOTE(bill): Out of memory */
if (arena->total_allocated + total_size > cast(isize)arena->total_size)
return NULL;
ptr = gb_align_forward(end, alignment);
arena->total_allocated += total_size;
return ptr;
} break;
case GB_ALLOCATION_FREE:
/* NOTE(bill): Free all at once
* Use Temp_Arena_Memory if you want to free a block */
break;
case GB_ALLOCATION_FREE_ALL:
arena->total_allocated = 0;
break;
case GB_ALLOCATION_RESIZE: {
/* TODO(bill): Check if ptr is on top of stack and just extend */
gbAllocator a = gb_arena_allocator(arena);
return gb_default_resize_align(a, old_memory, old_size, size, alignment);
} break;
}
return NULL; /* NOTE(bill): Default return value */
}
gb_inline gbTempArenaMemory
gb_temp_arena_memory_begin(gbArena *arena)
{
gbTempArenaMemory tmp;
tmp.arena = arena;
tmp.original_count = arena->total_allocated;
arena->temp_count++;
return tmp;
}
gb_inline void
gb_temp_arena_memory_end(gbTempArenaMemory tmp)
{
GB_ASSERT(tmp.arena->total_allocated >= tmp.original_count);
GB_ASSERT(tmp.arena->temp_count > 0);
tmp.arena->total_allocated = tmp.original_count;
tmp.arena->temp_count--;
}
/*
* Pool Allocator
*/
gb_inline void
gb_pool_init(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size)
{
gb_pool_init_align(pool, backing, num_blocks, block_size, GB_DEFAULT_MEMORY_ALIGNMENT);
}
void
gb_pool_init_align(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size, isize block_align)
{
isize actual_block_size, pool_size, block_index;
void *data, *curr;
uintptr *end;
gb_zero_struct(pool);
pool->backing = backing;
pool->block_size = block_size;
pool->block_align = block_align;
actual_block_size = block_size + block_align;
pool_size = num_blocks * actual_block_size;
data = gb_alloc_align(backing, pool_size, block_align);
/* NOTE(bill): Init intrusive freelist */
curr = data;
for (block_index = 0; block_index < num_blocks-1; block_index++) {
uintptr *next = cast(uintptr *)curr;
*next = cast(uintptr)curr + actual_block_size;
curr = gb_pointer_add(curr, actual_block_size);
}
end = cast(uintptr *)curr;
*end = cast(uintptr)NULL;
pool->physical_start = data;
pool->free_list = data;
}
gb_inline void
gb_pool_free(gbPool *pool)
{
if (pool->backing.proc) {
gb_free(pool->backing, pool->physical_start);
}
}
gb_inline gbAllocator
gb_pool_allocator(gbPool *pool)
{
gbAllocator allocator;
allocator.proc = gb_pool_allocator_proc;
allocator.data = pool;
return allocator;
}
GB_ALLOCATOR_PROC(gb_pool_allocator_proc)
{
gbPool *pool = cast(gbPool *)allocator_data;
gb_unused(options);
gb_unused(old_size);
switch (type) {
case GB_ALLOCATION_ALLOC: {
uintptr next_free;
void *ptr;
GB_ASSERT(size == pool->block_size);
GB_ASSERT(alignment == pool->block_align);
GB_ASSERT(pool->free_list != NULL);
next_free = *cast(uintptr *)pool->free_list;
ptr = pool->free_list;
pool->free_list = cast(void *)next_free;
pool->total_size += pool->block_size;
return ptr;
} break;
case GB_ALLOCATION_FREE: {
uintptr *next;
if (old_memory == NULL) return NULL;
next = cast(uintptr *)old_memory;
*next = cast(uintptr)pool->free_list;
pool->free_list = old_memory;
pool->total_size -= pool->block_size;
} break;
case GB_ALLOCATION_FREE_ALL:
/* TODO(bill): */
break;
case GB_ALLOCATION_RESIZE:
/* NOTE(bill): Cannot resize */
GB_ASSERT(false);
break;
}
return NULL;
}
gb_inline gbAllocationHeader *
gb_allocation_header(void *data)
{
isize *p = cast(isize *)data;
while (p[-1] == cast(isize)(-1))
p--;
return cast(gbAllocationHeader *)p - 1;
}
gb_inline void gb_allocation_header_fill(gbAllocationHeader *header, void *data, isize size)
{
isize *ptr;
header->size = size;
ptr = cast(isize *)(header + 1);
while (cast(void *)ptr < data)
*ptr++ = cast(isize)(-1);
}
/*
* Free List Allocator
*/
gb_inline void
gb_free_list_init(gbFreeList *fl, void *start, isize size)
{
GB_ASSERT(size > gb_size_of(gbFreeListBlock));
fl->physical_start = start;
fl->total_size = size;
fl->curr_block = cast(gbFreeListBlock *)start;
fl->curr_block->size = size;
fl->curr_block->next = NULL;
}
gb_inline void
gb_free_list_init_from_allocator(gbFreeList *fl, gbAllocator backing, isize size)
{
void *start = gb_alloc(backing, size);
gb_free_list_init(fl, start, size);
}
gb_inline gbAllocator
gb_free_list_allocator(gbFreeList *fl)
{
gbAllocator a;
a.proc = gb_free_list_allocator_proc;
a.data = fl;
return a;
}
GB_ALLOCATOR_PROC(gb_free_list_allocator_proc)
{
gbFreeList *fl = cast(gbFreeList *)allocator_data;
GB_ASSERT_NOT_NULL(fl);
switch (type) {
case GB_ALLOCATION_ALLOC: {
gbFreeListBlock *prev_block = NULL;
gbFreeListBlock *curr_block = fl->curr_block;
while (curr_block) {
void *ptr = NULL;
isize total_size;
gbAllocationHeader *header;
total_size = size + alignment + gb_size_of(gbAllocationHeader);
if (curr_block->size < total_size) {
prev_block = curr_block;
curr_block = curr_block->next;
continue;
}
if (curr_block->size - total_size <= gb_size_of(gbAllocationHeader)) {
total_size = curr_block->size;
if (prev_block)
prev_block->next = curr_block->next;
else
fl->curr_block = curr_block->next;
} else {
/* NOTE(bill): Create a new block for the remaining memory */
gbFreeListBlock *next_block;
next_block = cast(gbFreeListBlock *)gb_pointer_add(curr_block, total_size);
GB_ASSERT(cast(void *)next_block < gb_pointer_add(fl->physical_start, fl->total_size));
next_block->size = curr_block->size - total_size;
next_block->next = curr_block->next;
if (prev_block)
prev_block->next = next_block;
else
fl->curr_block = next_block;
}
/* TODO(bill): Set Header Info */
header = cast(gbAllocationHeader *)curr_block;
ptr = gb_align_forward(header+1, alignment);
gb_allocation_header_fill(header, ptr, size);
fl->total_allocated += total_size;
fl->allocation_count++;
return ptr;
}
/* NOTE(bill): Ran out of free list memory! FUCK! */
return NULL;
} break;
case GB_ALLOCATION_FREE: {
gbAllocationHeader *header = gb_allocation_header(old_memory);
isize block_size = header->size;
uintptr block_start, block_end;
gbFreeListBlock *prev_block = NULL;
gbFreeListBlock *curr_block = fl->curr_block;
block_start = cast(uintptr)header;
block_end = cast(uintptr)block_start + block_size;
while (curr_block) {
if (cast(uintptr)curr_block >= block_end)
break;
prev_block = curr_block;
curr_block = curr_block->next;
}
if (prev_block == NULL) {
prev_block = cast(gbFreeListBlock *)block_start;
prev_block->size = block_size;
prev_block->next = fl->curr_block;
fl->curr_block = prev_block;
} else if ((cast(uintptr)prev_block + prev_block->size) == block_start) {
prev_block->size += block_size;
} else {
gbFreeListBlock *tmp = cast(gbFreeListBlock *)block_start;
tmp->size = block_size;
tmp->next = prev_block->next;
prev_block->next = tmp;
prev_block = tmp;
}
if (curr_block && (cast(uintptr)curr_block == block_end)) {
prev_block->size += curr_block->size;
prev_block->next = curr_block->next;
}
fl->allocation_count--;
fl->total_allocated -= block_size;
} break;
case GB_ALLOCATION_FREE_ALL: {
gb_free_list_init(fl, fl->physical_start, fl->total_size);
} break;
case GB_ALLOCATION_RESIZE:
return gb_default_resize_align(gb_free_list_allocator(fl), old_memory, old_size, size, alignment);
}
return NULL;
}
void
gb_scratch_memory_init(gbScratchMemory *s, void *start, isize size)
{
s->physical_start = start;
s->total_size = size;
s->alloc_point = start;
s->free_point = start;
}
b32
gb_scratch_memory_is_in_use(gbScratchMemory *s, void *ptr)
{
if (s->free_point == s->alloc_point) return false;
if (s->alloc_point > s->free_point)
return ptr >= s->free_point && ptr < s->alloc_point;
return ptr >= s->free_point || ptr < s->alloc_point;
}
gbAllocator
gb_scratch_allocator(gbScratchMemory *s)
{
gbAllocator a;
a.proc = gb_scratch_allocator_proc;
a.data = s;
return a;
}
GB_ALLOCATOR_PROC(gb_scratch_allocator_proc)
{
gbScratchMemory *s = cast(gbScratchMemory *)allocator_data;
GB_ASSERT_NOT_NULL(s);
switch (type) {
case GB_ALLOCATION_ALLOC: {
void *ptr = s->alloc_point;
gbAllocationHeader *header = cast(gbAllocationHeader *)ptr;
void *data = gb_align_forward(header+1, alignment);
void *end = gb_pointer_add(s->physical_start, s->total_size);
GB_ASSERT(alignment % 4 == 0);
size = ((size + 3)/4)*4;
ptr = gb_pointer_add(ptr, size);
/* NOTE(bill): Wrap around */
if (ptr > end) {
header->size = gb_pointer_diff(header, end) | GB_ISIZE_HIGH_BIT;
ptr = s->physical_start;
header = cast(gbAllocationHeader *)ptr;
data = gb_align_forward(header+1, alignment);
ptr = gb_pointer_add(ptr, size);
}
if (!gb_scratch_memory_is_in_use(s, ptr)) {
gb_allocation_header_fill(header, ptr, gb_pointer_diff(header, ptr));
s->alloc_point = cast(u8 *)ptr;
return data;
}
} break;
case GB_ALLOCATION_FREE: {
if (old_memory) {
void *end = gb_pointer_add(s->physical_start, s->total_size);
if (old_memory < s->physical_start || old_memory >= end) {
GB_ASSERT(false);
} else {
/* NOTE(bill): Mark as free */
gbAllocationHeader *h = gb_allocation_header(old_memory);
GB_ASSERT((h->size & GB_ISIZE_HIGH_BIT) == 0);
h->size = h->size | GB_ISIZE_HIGH_BIT;
while (s->free_point != s->alloc_point) {
gbAllocationHeader *header = cast(gbAllocationHeader *)s->free_point;
if ((header->size & GB_ISIZE_HIGH_BIT) == 0)
break;
s->free_point = gb_pointer_add(s->free_point, h->size & (~GB_ISIZE_HIGH_BIT));
if (s->free_point == end)
s->free_point = s->physical_start;
}
}
}
} break;
case GB_ALLOCATION_FREE_ALL: {
s->alloc_point = s->physical_start;
s->free_point = s->physical_start;
} break;
case GB_ALLOCATION_RESIZE:
return gb_default_resize_align(gb_scratch_allocator(s), old_memory, old_size, size, alignment);
}
return NULL;
}
/***************************************************************
*
* Sorting
*
*/
/* TODO(bill): Should I make all the macros local? */
#define GB__COMPARE_PROC(Type) \
gb_global isize gb__##Type##_cmp_offset; \
GB_COMPARE_PROC(gb__##Type##_cmp) \
{ \
Type const p = *cast(Type const *)gb_pointer_add_const(a, gb__##Type##_cmp_offset); \
Type const q = *cast(Type const *)gb_pointer_add_const(b, gb__##Type##_cmp_offset); \
return p < q ? -1 : p > q; \
} \
GB_COMPARE_PROC_PTR(gb_##Type##_cmp(isize offset)) \
{ \
gb__##Type##_cmp_offset = offset; \
return &gb__##Type##_cmp; \
}
GB__COMPARE_PROC(i16);
GB__COMPARE_PROC(i32);
GB__COMPARE_PROC(i64);
GB__COMPARE_PROC(isize);
GB__COMPARE_PROC(f32);
GB__COMPARE_PROC(f64);
GB__COMPARE_PROC(char);
/* NOTE(bill): str_cmp is special as it requires a funny type and funny comparison*/
gb_global isize gb__str_cmp_offset;
GB_COMPARE_PROC(gb__str_cmp)
{
char const *p = *cast(char const **)gb_pointer_add_const(a, gb__str_cmp_offset);
char const *q = *cast(char const **)gb_pointer_add_const(b, gb__str_cmp_offset);
return gb_strcmp(p, q);
}
GB_COMPARE_PROC_PTR(gb_str_cmp(isize offset))
{
gb__str_cmp_offset = offset;
return &gb__str_cmp;
}
#undef GB__COMPARE_PROC
gb_inline void
gb_qsort(void *base, isize count, isize size, gbCompareProc cmp)
{
/* TODO(bill): Implement a custom sort */
qsort(base, count, size, cmp);
}
void
gb_radix_sort_u8(u8 *gb_restrict items, u8 *gb_restrict temp, isize count)
{
u8 *gb_restrict source = items;
u8 *gb_restrict dest = temp;
isize i;
isize offsets[256] = {0};
i64 total = 0;
/* NOTE(bill): First pass - count how many of each key */
for (i = 0; i < count; i++) {
u8 radix_value = source[i];
u8 radix_piece = radix_value & 0xff;
offsets[radix_piece]++;
}
/* NOTE(bill): Change counts to offsets */
for (i = 0; i < gb_count_of(offsets); i++) {
u8 skcount = offsets[i];
offsets[i] = total;
total += skcount;
}
/* NOTE(bill): Second pass - place elements into the right location */
for (i = 0; i < count; i++) {
u8 radix_value = source[i];
u8 radix_piece = radix_value & 0xff;
dest[offsets[radix_piece]++] = source[i];
}
gb_swap(u8 *gb_restrict, source, dest);
}
void
gb_radix_sort_u16(u16 *gb_restrict items, u16 *gb_restrict temp, isize count)
{
u16 *gb_restrict source = items;
u16 *gb_restrict dest = temp;
isize byte_index, i;
for (byte_index = 0; byte_index < 16; byte_index += 8) {
isize offsets[256] = {0};
i64 total = 0;
/* NOTE(bill): First pass - count how many of each key */
for (i = 0; i < count; i++) {
u16 radix_value = source[i];
u16 radix_piece = (radix_value >> byte_index) & 0xff;
offsets[radix_piece]++;
}
/* NOTE(bill): Change counts to offsets */
for (i = 0; i < gb_count_of(offsets); i++) {
u16 skcount = offsets[i];
offsets[i] = total;
total += skcount;
}
/* NOTE(bill): Second pass - place elements into the right location */
for (i = 0; i < count; i++) {
u16 radix_value = source[i];
u16 radix_piece = (radix_value >> byte_index) & 0xff;
dest[offsets[radix_piece]++] = source[i];
}
gb_swap(u16 *gb_restrict, source, dest);
}
}
void
gb_radix_sort_u32(u32 *gb_restrict items, u32 *gb_restrict temp, isize count)
{
u32 *gb_restrict source = items;
u32 *gb_restrict dest = temp;
isize byte_index, i;
for (byte_index = 0; byte_index < 32; byte_index += 8) {
isize offsets[256] = {0};
i64 total = 0;
/* NOTE(bill): First pass - count how many of each key */
for (i = 0; i < count; i++) {
u32 radix_value = source[i];
u32 radix_piece = (radix_value >> byte_index) & 0xff;
offsets[radix_piece]++;
}
/* NOTE(bill): Change counts to offsets */
for (i = 0; i < gb_count_of(offsets); i++) {
u32 skcount = offsets[i];
offsets[i] = total;
total += skcount;
}
/* NOTE(bill): Second pass - place elements into the right location */
for (i = 0; i < count; i++) {
u32 radix_value = source[i];
u32 radix_piece = (radix_value >> byte_index) & 0xff;
dest[offsets[radix_piece]++] = source[i];
}
gb_swap(u32 *gb_restrict, source, dest);
}
}
void
gb_radix_sort_u64(u64 *gb_restrict items, u64 *gb_restrict temp, isize count)
{
u64 *gb_restrict source = items;
u64 *gb_restrict dest = temp;
isize byte_index, i;
for (byte_index = 0; byte_index < 64; byte_index += 8) {
isize offsets[256] = {0};
i64 total = 0;
/* NOTE(bill): First pass - count how many of each key */
for (i = 0; i < count; i++) {
u64 radix_value = source[i];
u64 radix_piece = (radix_value >> byte_index) & 0xff;
offsets[radix_piece]++;
}
/* NOTE(bill): Change counts to offsets */
for (i = 0; i < gb_count_of(offsets); i++) {
u64 skcount = offsets[i];
offsets[i] = total;
total += skcount;
}
/* NOTE(bill): Second pass - place elements into the right location */
for (i = 0; i < count; i++) {
u64 radix_value = source[i];
u64 radix_piece = (radix_value >> byte_index) & 0xff;
dest[offsets[radix_piece]++] = source[i];
}
gb_swap(u64 *gb_restrict, source, dest);
}
}
gb_inline isize
gb_binary_search(void const *base, isize count, isize size, void const *key, gbCompareProc compare_proc)
{
isize start = 0;
isize end = count;
while (start < end) {
isize mid = start + (end-start)/2;
isize result = compare_proc(key, cast(u8 *)base + mid*size);
if (result < 0)
end = mid;
else if (result > 0)
start = mid+1;
else
return mid;
}
return -1;
}
/***************************************************************
*
* Char things
*
*/
gb_inline char
gb_char_to_lower(char c)
{
if (c >= 'A' && c <= 'Z')
return 'a' + (c - 'A');
return c;
}
gb_inline char
gb_char_to_upper(char c)
{
if (c >= 'a' && c <= 'z')
return 'A' + (c - 'a');
return c;
}
gb_inline b32
gb_char_is_space(char c)
{
if (c == ' ' ||
c == '\t' ||
c == '\n' ||
c == '\r' ||
c == '\f' ||
c == '\v')
return true;
return false;
}
gb_inline b32
gb_char_is_digit(char c)
{
if (c >= '0' && c <= '9')
return true;
return false;
}
gb_inline b32
gb_char_is_hex_digit(char c)
{
if (gb_char_is_digit(c) ||
(c >= 'a' && c <= 'f') ||
(c >= 'A' && c <= 'F'))
return true;
return false;
}
gb_inline b32
gb_char_is_alpha(char c)
{
if ((c >= 'A' && c <= 'Z') ||
(c >= 'a' && c <= 'z'))
return true;
return false;
}
gb_inline b32
gb_char_is_alphanumeric(char c)
{
return gb_char_is_alpha(c) || gb_char_is_digit(c);
}
gb_inline i32
gb_digit_to_int(char c)
{
return gb_char_is_digit(c) ? c - '0' : c - 'W';
}
gb_inline i32
gb_hex_digit_to_int(char c)
{
if (gb_char_is_digit(c))
return gb_digit_to_int(c);
else if (gb_is_between(c, 'a', 'f'))
return c - 'a' + 10;
else if (gb_is_between(c, 'A', 'F'))
return c - 'A' + 10;
return 0;
}
gb_inline void
gb_to_lower(char *str)
{
if (!str) return;
while (*str) {
*str = gb_char_to_lower(*str);
str++;
}
}
gb_inline void
gb_to_upper(char *str)
{
if (!str) return;
while (*str) {
*str = gb_char_to_upper(*str);
str++;
}
}
gb_inline isize
gb_strlen(char const *str)
{
isize result = 0;
if (str) {
char const *end = str;
while (*end) end++;
result = end - str;
}
return result;
}
gb_inline isize
gb_strnlen(char const *str, isize max_len)
{
isize result = 0;
if (str) {
char const *end = str;
while (*end && result < max_len) end++;
result = end - str;
}
return result;
}
gb_inline isize
gb_utf8_strlen(char const *str)
{
isize result = 0;
for (; *str; str++) {
if ((*str & 0xc0) != 0x80)
result++;
}
return result;
}
gb_inline isize
gb_utf8_strnlen(char const *str, isize max_len)
{
isize result = 0;
for (; *str && result < max_len; str++) {
if ((*str & 0xc0) != 0x80)
result++;
}
return result;
}
gb_inline i32
gb_strcmp(char const *s1, char const *s2)
{
while (*s1 && (*s1 == *s2)) {
s1++, s2++;
}
return *(u8 *)s1 - *(u8 *)s2;
}
gb_inline char *
gb_strcpy(char *dest, char const *source)
{
GB_ASSERT_NOT_NULL(dest);
if (source) {
char *str = dest;
while (*source) *str++ = *source++;
}
return dest;
}
gb_inline char *
gb_strncpy(char *dest, char const *source, isize len)
{
GB_ASSERT_NOT_NULL(dest);
if (source) {
char *str = dest;
while (len > 0 && *source) {
*str++ = *source++;
len--;
}
while (len > 0) {
*str++ = '\0';
len--;
}
}
return dest;
}
gb_inline i32
gb_strncmp(char const *s1, char const *s2, isize len)
{
for(; len > 0; s1++, s2++, len--) {
if (*s1 != *s2)
return ((cast(uintptr)s1 < cast(uintptr)s2) ? -1 : +1);
else if (*s1 == '\0')
return 0;
}
return 0;
}
gb_inline char const *
gb_strtok(char *output, char const *src, char const *delimit)
{
while (*src && gb_char_first_occurence(delimit, *src) != NULL)
*output++ = *src++;
*output = 0;
return *src ? src+1 : src;
}
gb_inline b32
gb_str_has_prefix(char const *str, char const *prefix)
{
while (*prefix) {
if (*str++ != *prefix++)
return false;
}
return true;
}
gb_inline b32
gb_str_has_suffix(char const *str, char const *suffix)
{
isize i = gb_strlen(str);
isize j = gb_strlen(suffix);
if (j <= i)
return gb_strcmp(str+i-j, suffix) == 0;
return false;
}
gb_inline char const *
gb_char_first_occurence(char const *s, char c)
{
char ch = c;
for (; *s != ch; s++) {
if (*s == '\0')
return NULL;
}
return s;
}
gb_inline char const *
gb_char_last_occurence(char const *s, char c)
{
char const *result = NULL;
do {
if (*s == c)
result = s;
} while (*s++);
return result;
}
gb_inline void
gb_str_concat(char *dest, isize dest_len,
char const *src_a, isize src_a_len,
char const *src_b, isize src_b_len)
{
GB_ASSERT(dest_len >= src_a_len+src_b_len+1);
if (dest) {
gb_memcopy(dest, src_a, src_a_len);
gb_memcopy(dest+src_a_len, src_b, src_b_len);
dest[src_a_len+src_b_len] = '\0';
}
}
gb_inline void gb__set_string_length (gbString str, isize len) { GB_STRING_HEADER(str)->length = len; }
gb_inline void gb__set_string_capacity(gbString str, isize cap) { GB_STRING_HEADER(str)->capacity = cap; }
gb_inline gbString
gb_string_make(gbAllocator a, char const *str)
{
isize len = str ? gb_strlen(str) : 0;
return gb_string_make_length(a, str, len);
}
gbString
gb_string_make_length(gbAllocator a, void const *init_str, isize num_bytes)
{
isize header_size = gb_size_of(gbStringHeader);
void *ptr = gb_alloc(a, header_size + num_bytes + 1);
gbString str;
gbStringHeader *header;
if (!init_str) gb_zero_size(ptr, header_size + num_bytes + 1);
if (ptr == NULL) return NULL;
str = cast(char *)ptr + header_size;
header = GB_STRING_HEADER(str);
header->allocator = a;
header->length = num_bytes;
header->capacity = num_bytes;
if (num_bytes && init_str)
gb_memcopy(str, init_str, num_bytes);
str[num_bytes] = '\0';
return str;
}
gb_inline void
gb_string_free(gbString str)
{
if (str) {
gbStringHeader *header = GB_STRING_HEADER(str);
gb_free(header->allocator, header);
}
}
gb_inline gbString gb_string_duplicate(gbAllocator a, gbString const str) { return gb_string_make_length(a, str, gb_string_length(str)); }
gb_inline isize gb_string_length (gbString const str) { return GB_STRING_HEADER(str)->length; }
gb_inline isize gb_string_capacity(gbString const str) { return GB_STRING_HEADER(str)->capacity; }
gb_inline isize
gb_string_available_space(gbString const str)
{
gbStringHeader *h = GB_STRING_HEADER(str);
if (h->capacity > h->length)
return h->capacity - h->length;
return 0;
}
gb_inline void gb_string_clear(gbString str) { gb__set_string_length(str, 0); str[0] = '\0'; }
gb_inline gbString gb_string_append(gbString str, gbString const other) { return gb_string_append_length(str, other, gb_string_length(other)); }
gbString
gb_string_append_length(gbString str, void const *other, isize other_len)
{
isize curr_len = gb_string_length(str);
str = gb_string_make_space_for(str, other_len);
if (str == NULL)
return NULL;
gb_memcopy(str + curr_len, other, other_len);
str[curr_len + other_len] = '\0';
gb__set_string_length(str, curr_len + other_len);
return str;
}
gb_inline gbString
gb_string_appendc(gbString str, char const *other)
{
return gb_string_append_length(str, other, cast(isize)strlen(other));
}
gbString
gb_string_set(gbString str, char const *cstr)
{
isize len = gb_strlen(cstr);
if (gb_string_capacity(str) < len) {
str = gb_string_make_space_for(str, len - gb_string_length(str));
if (str == NULL)
return NULL;
}
gb_memcopy(str, cstr, len);
str[len] = '\0';
gb__set_string_length(str, len);
return str;
}
gbString
gb_string_make_space_for(gbString str, isize add_len)
{
isize available = gb_string_available_space(str);
/* Return if there is enough space left */
if (available >= add_len) {
return str;
} else {
isize new_len, old_size, new_size;
void *ptr, *new_ptr;
new_len = gb_string_length(str) + add_len;
ptr = GB_STRING_HEADER(str);
old_size = gb_size_of(gbStringHeader) + gb_string_length(str) + 1;
new_size = gb_size_of(gbStringHeader) + new_len + 1;
new_ptr = gb_resize(GB_STRING_HEADER(str)->allocator, ptr, old_size, new_size);
if (new_ptr == NULL) return NULL;
str = cast(char *)(GB_STRING_HEADER(new_ptr) + 1);
gb__set_string_capacity(str, new_len);
return str;
}
}
gb_inline isize
gb_string_allocation_size(gbString const str)
{
isize cap = gb_string_capacity(str);
return gb_size_of(gbStringHeader) + cap;
}
gb_inline b32
gb_string_are_equal(gbString const lhs, gbString const rhs)
{
isize lhs_len, rhs_len, i;
lhs_len = gb_string_length(lhs);
rhs_len = gb_string_length(rhs);
if (lhs_len != rhs_len)
return false;
for (i = 0; i < lhs_len; i++) {
if (lhs[i] != rhs[i])
return false;
}
return true;
}
gbString
gb_string_trim(gbString str, char const *cut_set)
{
char *start, *end, *start_pos, *end_pos;
isize len;
start_pos = start = str;
end_pos = end = str + gb_string_length(str) - 1;
while (start_pos <= end && gb_char_first_occurence(cut_set, *start_pos))
start_pos++;
while (end_pos > start_pos && gb_char_first_occurence(cut_set, *end_pos))
end_pos--;
len = cast(isize)((start_pos > end_pos) ? 0 : ((end_pos - start_pos)+1));
if (str != start_pos)
gb_memmove(str, start_pos, len);
str[len] = '\0';
gb__set_string_length(str, len);
return str;
}
gb_inline gbString gb_string_trim_space(gbString str) { return gb_string_trim(str, " \t\r\n\v\f"); }
/***************************************************************
*
* Windows UTF-8 Handling
*
*/
char16 *
gb_utf8_to_utf16(char16 *buffer, char *s, isize len)
{
u8 *str = cast(u8 *)s;
char32 c;
isize i = 0;
len--;
while (*str) {
if (i >= len)
return NULL;
if (!(*str & 0x80)) {
buffer[i++] = *str++;
} else if ((*str & 0xe0) == 0xc0) {
if (*str < 0xc2)
return NULL;
c = (*str++ & 0x1f) << 6;
if ((*str & 0xc0) != 0x80)
return NULL;
buffer[i++] = c + (*str++ & 0x3f);
} else if ((*str & 0xf0) == 0xe0) {
if (*str == 0xe0 &&
(str[1] < 0xa0 || str[1] > 0xbf))
return NULL;
if (*str == 0xed && str[1] > 0x9f) /* str[1] < 0x80 is checked below */
return NULL;
c = (*str++ & 0x0f) << 12;
if ((*str & 0xc0) != 0x80)
return NULL;
c += (*str++ & 0x3f) << 6;
if ((*str & 0xc0) != 0x80)
return NULL;
buffer[i++] = c + (*str++ & 0x3f);
} else if ((*str & 0xf8) == 0xf0) {
if (*str > 0xf4)
return NULL;
if (*str == 0xf0 && (str[1] < 0x90 || str[1] > 0xbf))
return NULL;
if (*str == 0xf4 && str[1] > 0x8f) /* str[1] < 0x80 is checked below */
return NULL;
c = (*str++ & 0x07) << 18;
if ((*str & 0xc0) != 0x80)
return NULL;
c += (*str++ & 0x3f) << 12;
if ((*str & 0xc0) != 0x80)
return NULL;
c += (*str++ & 0x3f) << 6;
if ((*str & 0xc0) != 0x80)
return NULL;
c += (*str++ & 0x3f);
/* UTF-8 encodings of values used in surrogate pairs are invalid */
if ((c & 0xfffff800) == 0xd800)
return NULL;
if (c >= 0x10000) {
c -= 0x10000;
if (i+2 > len)
return NULL;
buffer[i++] = 0xd800 | (0x3ff & (c>>10));
buffer[i++] = 0xdc00 | (0x3ff & (c ));
}
} else {
return NULL;
}
}
buffer[i] = 0;
return buffer;
}
char *
gb_utf16_to_utf8(char *buffer, char16 *str, isize len)
{
isize i = 0;
len--;
while (*str) {
if (*str < 0x80) {
if (i+1 > len)
return NULL;
buffer[i++] = (char) *str++;
} else if (*str < 0x800) {
if (i+2 > len)
return NULL;
buffer[i++] = 0xc0 + (*str >> 6);
buffer[i++] = 0x80 + (*str & 0x3f);
str += 1;
} else if (*str >= 0xd800 && *str < 0xdc00) {
char32 c;
if (i+4 > len)
return NULL;
c = ((str[0] - 0xd800) << 10) + ((str[1]) - 0xdc00) + 0x10000;
buffer[i++] = 0xf0 + (c >> 18);
buffer[i++] = 0x80 + ((c >> 12) & 0x3f);
buffer[i++] = 0x80 + ((c >> 6) & 0x3f);
buffer[i++] = 0x80 + ((c ) & 0x3f);
str += 2;
} else if (*str >= 0xdc00 && *str < 0xe000) {
return NULL;
} else {
if (i+3 > len)
return NULL;
buffer[i++] = 0xe0 + (*str >> 12);
buffer[i++] = 0x80 + ((*str >> 6) & 0x3f);
buffer[i++] = 0x80 + ((*str ) & 0x3f);
str += 1;
}
}
buffer[i] = 0;
return buffer;
}
#define GB__UTF_SIZE 4
#define GB__UTF_INVALID 0xfffd
gb_global u8 const gb__utf_byte[GB__UTF_SIZE+1] = {0x80, 0, 0xc0, 0xe0, 0xf0};
gb_global u8 const gb__utf_mask[GB__UTF_SIZE+1] = {0xc0, 0x80, 0xe0, 0xf0, 0xf8};
gb_global char32 const gb__utf_min [GB__UTF_SIZE+1] = {0, 0, 0x80, 0x800, 0x10000};
gb_global char32 const gb__utf_max [GB__UTF_SIZE+1] = {0x10ffff, 0x7f, 0x7ff, 0xffff, 0x10ffff};
gb_internal isize
gb__utf_validate(char32 *c, isize i)
{
GB_ASSERT_NOT_NULL(c);
if (!c) return 0;
if (!gb_is_between(*c, gb__utf_min[i], gb__utf_max[i]) ||
gb_is_between(*c, 0xd800, 0xdfff)) {
*c = GB__UTF_INVALID;
}
i = 1;
while (*c > gb__utf_max[i])
i++;
return i;
}
gb_internal char32
gb__utf_decode_byte(char c, isize *i)
{
GB_ASSERT_NOT_NULL(i);
if (!i) return 0;
for (*i = 0; *i < gb_count_of(gb__utf_mask); (*i)++) {
if ((cast(u8)c & gb__utf_mask[*i]) == gb__utf_byte[*i])
return cast(u8)(c & ~gb__utf_mask[*i]);
}
return 0;
}
gb_inline isize gb_utf8_decode(char const *str, char32 *codepoint) { return gb_utf8_decode_len(str, gb_strlen(str), codepoint); }
isize
gb_utf8_decode_len(char const *s, isize str_len, char32 *c)
{
isize i, j, len, type = 0;
char32 cp;
GB_ASSERT_NOT_NULL(s);
GB_ASSERT_NOT_NULL(c);
if (!s || !c) return 0;
if (!str_len) return 0;
*c = GB__UTF_INVALID;
cp = gb__utf_decode_byte(s[0], &len);
if (!gb_is_between(len, 1, GB__UTF_SIZE))
return 1;
for (i = 1, j = 1; i < str_len && j < len; i++, j++) {
cp = (cp << 6) | gb__utf_decode_byte(s[i], &type);
if (type != 0)
return j;
}
if (j < len)
return 0;
*c = cp;
gb__utf_validate(c, len);
return len;
}
/***************************************************************
*
* Array
*
*/
gb_no_inline void *
gb__array_set_capacity(void *array, isize capacity, isize element_size)
{
gbArrayHeader *h = GB_ARRAY_HEADER(array);
GB_ASSERT(element_size > 0);
if (capacity == h->capacity)
return array;
if (capacity < h->count) {
if (h->capacity < capacity) {
isize new_capacity = GB_ARRAY_GROW_FORMULA(h->capacity);
if (new_capacity < capacity)
new_capacity = capacity;
gb__array_set_capacity(array, new_capacity, element_size);
}
h->count = capacity;
}
{
isize size = gb_size_of(gbArrayHeader) + element_size*capacity;
gbArrayHeader *nh = cast(gbArrayHeader *)gb_alloc(h->allocator, size);
gb_memmove(nh, h, gb_size_of(gbArrayHeader) + element_size*h->count);
nh->allocator = h->allocator;
nh->count = h->count;
nh->capacity = capacity;
gb_free(h->allocator, h);
return nh+1;
}
}
/***************************************************************
*
* Hashing functions
*
*/
u32
gb_adler32(void const *data, isize len)
{
u32 const MOD_ALDER = 65521;
u32 a = 1, b = 0;
isize i, block_len;
u8 const *bytes = cast(u8 const *)data;
block_len = len % 5552;
while (len) {
for (i = 0; i+7 < block_len; i += 8) {
a += bytes[0], b += a;
a += bytes[1], b += a;
a += bytes[2], b += a;
a += bytes[3], b += a;
a += bytes[4], b += a;
a += bytes[5], b += a;
a += bytes[6], b += a;
a += bytes[7], b += a;
bytes += 8;
}
for (; i < block_len; i++)
a += *bytes++, b += a;
a %= MOD_ALDER, b %= MOD_ALDER;
len -= block_len;
block_len = 5552;
}
return (b << 16) | a;
}
gb_global u32 const GB__CRC32_TABLE[256] = {
0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
};
gb_global u64 const GB__CRC64_TABLE[256] = {
0x0000000000000000ull, 0x42f0e1eba9ea3693ull, 0x85e1c3d753d46d26ull, 0xc711223cfa3e5bb5ull,
0x493366450e42ecdfull, 0x0bc387aea7a8da4cull, 0xccd2a5925d9681f9ull, 0x8e224479f47cb76aull,
0x9266cc8a1c85d9beull, 0xd0962d61b56fef2dull, 0x17870f5d4f51b498ull, 0x5577eeb6e6bb820bull,
0xdb55aacf12c73561ull, 0x99a54b24bb2d03f2ull, 0x5eb4691841135847ull, 0x1c4488f3e8f96ed4ull,
0x663d78ff90e185efull, 0x24cd9914390bb37cull, 0xe3dcbb28c335e8c9ull, 0xa12c5ac36adfde5aull,
0x2f0e1eba9ea36930ull, 0x6dfeff5137495fa3ull, 0xaaefdd6dcd770416ull, 0xe81f3c86649d3285ull,
0xf45bb4758c645c51ull, 0xb6ab559e258e6ac2ull, 0x71ba77a2dfb03177ull, 0x334a9649765a07e4ull,
0xbd68d2308226b08eull, 0xff9833db2bcc861dull, 0x388911e7d1f2dda8ull, 0x7a79f00c7818eb3bull,
0xcc7af1ff21c30bdeull, 0x8e8a101488293d4dull, 0x499b3228721766f8ull, 0x0b6bd3c3dbfd506bull,
0x854997ba2f81e701ull, 0xc7b97651866bd192ull, 0x00a8546d7c558a27ull, 0x4258b586d5bfbcb4ull,
0x5e1c3d753d46d260ull, 0x1cecdc9e94ace4f3ull, 0xdbfdfea26e92bf46ull, 0x990d1f49c77889d5ull,
0x172f5b3033043ebfull, 0x55dfbadb9aee082cull, 0x92ce98e760d05399ull, 0xd03e790cc93a650aull,
0xaa478900b1228e31ull, 0xe8b768eb18c8b8a2ull, 0x2fa64ad7e2f6e317ull, 0x6d56ab3c4b1cd584ull,
0xe374ef45bf6062eeull, 0xa1840eae168a547dull, 0x66952c92ecb40fc8ull, 0x2465cd79455e395bull,
0x3821458aada7578full, 0x7ad1a461044d611cull, 0xbdc0865dfe733aa9ull, 0xff3067b657990c3aull,
0x711223cfa3e5bb50ull, 0x33e2c2240a0f8dc3ull, 0xf4f3e018f031d676ull, 0xb60301f359dbe0e5ull,
0xda050215ea6c212full, 0x98f5e3fe438617bcull, 0x5fe4c1c2b9b84c09ull, 0x1d14202910527a9aull,
0x93366450e42ecdf0ull, 0xd1c685bb4dc4fb63ull, 0x16d7a787b7faa0d6ull, 0x5427466c1e109645ull,
0x4863ce9ff6e9f891ull, 0x0a932f745f03ce02ull, 0xcd820d48a53d95b7ull, 0x8f72eca30cd7a324ull,
0x0150a8daf8ab144eull, 0x43a04931514122ddull, 0x84b16b0dab7f7968ull, 0xc6418ae602954ffbull,
0xbc387aea7a8da4c0ull, 0xfec89b01d3679253ull, 0x39d9b93d2959c9e6ull, 0x7b2958d680b3ff75ull,
0xf50b1caf74cf481full, 0xb7fbfd44dd257e8cull, 0x70eadf78271b2539ull, 0x321a3e938ef113aaull,
0x2e5eb66066087d7eull, 0x6cae578bcfe24bedull, 0xabbf75b735dc1058ull, 0xe94f945c9c3626cbull,
0x676dd025684a91a1ull, 0x259d31cec1a0a732ull, 0xe28c13f23b9efc87ull, 0xa07cf2199274ca14ull,
0x167ff3eacbaf2af1ull, 0x548f120162451c62ull, 0x939e303d987b47d7ull, 0xd16ed1d631917144ull,
0x5f4c95afc5edc62eull, 0x1dbc74446c07f0bdull, 0xdaad56789639ab08ull, 0x985db7933fd39d9bull,
0x84193f60d72af34full, 0xc6e9de8b7ec0c5dcull, 0x01f8fcb784fe9e69ull, 0x43081d5c2d14a8faull,
0xcd2a5925d9681f90ull, 0x8fdab8ce70822903ull, 0x48cb9af28abc72b6ull, 0x0a3b7b1923564425ull,
0x70428b155b4eaf1eull, 0x32b26afef2a4998dull, 0xf5a348c2089ac238ull, 0xb753a929a170f4abull,
0x3971ed50550c43c1ull, 0x7b810cbbfce67552ull, 0xbc902e8706d82ee7ull, 0xfe60cf6caf321874ull,
0xe224479f47cb76a0ull, 0xa0d4a674ee214033ull, 0x67c58448141f1b86ull, 0x253565a3bdf52d15ull,
0xab1721da49899a7full, 0xe9e7c031e063acecull, 0x2ef6e20d1a5df759ull, 0x6c0603e6b3b7c1caull,
0xf6fae5c07d3274cdull, 0xb40a042bd4d8425eull, 0x731b26172ee619ebull, 0x31ebc7fc870c2f78ull,
0xbfc9838573709812ull, 0xfd39626eda9aae81ull, 0x3a28405220a4f534ull, 0x78d8a1b9894ec3a7ull,
0x649c294a61b7ad73ull, 0x266cc8a1c85d9be0ull, 0xe17dea9d3263c055ull, 0xa38d0b769b89f6c6ull,
0x2daf4f0f6ff541acull, 0x6f5faee4c61f773full, 0xa84e8cd83c212c8aull, 0xeabe6d3395cb1a19ull,
0x90c79d3fedd3f122ull, 0xd2377cd44439c7b1ull, 0x15265ee8be079c04ull, 0x57d6bf0317edaa97ull,
0xd9f4fb7ae3911dfdull, 0x9b041a914a7b2b6eull, 0x5c1538adb04570dbull, 0x1ee5d94619af4648ull,
0x02a151b5f156289cull, 0x4051b05e58bc1e0full, 0x87409262a28245baull, 0xc5b073890b687329ull,
0x4b9237f0ff14c443ull, 0x0962d61b56fef2d0ull, 0xce73f427acc0a965ull, 0x8c8315cc052a9ff6ull,
0x3a80143f5cf17f13ull, 0x7870f5d4f51b4980ull, 0xbf61d7e80f251235ull, 0xfd913603a6cf24a6ull,
0x73b3727a52b393ccull, 0x31439391fb59a55full, 0xf652b1ad0167feeaull, 0xb4a25046a88dc879ull,
0xa8e6d8b54074a6adull, 0xea16395ee99e903eull, 0x2d071b6213a0cb8bull, 0x6ff7fa89ba4afd18ull,
0xe1d5bef04e364a72ull, 0xa3255f1be7dc7ce1ull, 0x64347d271de22754ull, 0x26c49cccb40811c7ull,
0x5cbd6cc0cc10fafcull, 0x1e4d8d2b65facc6full, 0xd95caf179fc497daull, 0x9bac4efc362ea149ull,
0x158e0a85c2521623ull, 0x577eeb6e6bb820b0ull, 0x906fc95291867b05ull, 0xd29f28b9386c4d96ull,
0xcedba04ad0952342ull, 0x8c2b41a1797f15d1ull, 0x4b3a639d83414e64ull, 0x09ca82762aab78f7ull,
0x87e8c60fded7cf9dull, 0xc51827e4773df90eull, 0x020905d88d03a2bbull, 0x40f9e43324e99428ull,
0x2cffe7d5975e55e2ull, 0x6e0f063e3eb46371ull, 0xa91e2402c48a38c4ull, 0xebeec5e96d600e57ull,
0x65cc8190991cb93dull, 0x273c607b30f68faeull, 0xe02d4247cac8d41bull, 0xa2dda3ac6322e288ull,
0xbe992b5f8bdb8c5cull, 0xfc69cab42231bacfull, 0x3b78e888d80fe17aull, 0x7988096371e5d7e9ull,
0xf7aa4d1a85996083ull, 0xb55aacf12c735610ull, 0x724b8ecdd64d0da5ull, 0x30bb6f267fa73b36ull,
0x4ac29f2a07bfd00dull, 0x08327ec1ae55e69eull, 0xcf235cfd546bbd2bull, 0x8dd3bd16fd818bb8ull,
0x03f1f96f09fd3cd2ull, 0x41011884a0170a41ull, 0x86103ab85a2951f4ull, 0xc4e0db53f3c36767ull,
0xd8a453a01b3a09b3ull, 0x9a54b24bb2d03f20ull, 0x5d45907748ee6495ull, 0x1fb5719ce1045206ull,
0x919735e51578e56cull, 0xd367d40ebc92d3ffull, 0x1476f63246ac884aull, 0x568617d9ef46bed9ull,
0xe085162ab69d5e3cull, 0xa275f7c11f7768afull, 0x6564d5fde549331aull, 0x279434164ca30589ull,
0xa9b6706fb8dfb2e3ull, 0xeb46918411358470ull, 0x2c57b3b8eb0bdfc5ull, 0x6ea7525342e1e956ull,
0x72e3daa0aa188782ull, 0x30133b4b03f2b111ull, 0xf7021977f9cceaa4ull, 0xb5f2f89c5026dc37ull,
0x3bd0bce5a45a6b5dull, 0x79205d0e0db05dceull, 0xbe317f32f78e067bull, 0xfcc19ed95e6430e8ull,
0x86b86ed5267cdbd3ull, 0xc4488f3e8f96ed40ull, 0x0359ad0275a8b6f5ull, 0x41a94ce9dc428066ull,
0xcf8b0890283e370cull, 0x8d7be97b81d4019full, 0x4a6acb477bea5a2aull, 0x089a2aacd2006cb9ull,
0x14dea25f3af9026dull, 0x562e43b4931334feull, 0x913f6188692d6f4bull, 0xd3cf8063c0c759d8ull,
0x5dedc41a34bbeeb2ull, 0x1f1d25f19d51d821ull, 0xd80c07cd676f8394ull, 0x9afce626ce85b507ull,
};
u32
gb_crc32(void const *data, isize len)
{
isize remaining;
u32 result = ~(cast(u32)0);
u8 const *c = cast(u8 const *)data;
for (remaining = len; remaining--; c++)
result = (result >> 8) ^ (GB__CRC32_TABLE[(result ^ *c) & 0xff]);
return ~result;
}
u64
gb_crc64(void const *data, isize len)
{
isize remaining;
u64 result = ~(cast(u64)0);
u8 const *c = cast(u8 const *)data;
for (remaining = len; remaining--; c++)
result = (result >> 8) ^ (GB__CRC64_TABLE[(result ^ *c) & 0xff]);
return ~result;
}
u32
gb_fnv32(void const *data, isize len)
{
isize i;
u32 h = 0x811c9dc5;
u8 const *c = cast(u8 const *)data;
for (i = 0; i < len; i++)
h = (h * 0x01000193) ^ c[i];
return h;
}
u64
gb_fnv64(void const *data, isize len)
{
isize i;
u64 h = 0xcbf29ce484222325ull;
u8 const *c = cast(u8 const *)data;
for (i = 0; i < len; i++)
h = (h * 0x100000001b3ll) ^ c[i];
return h;
}
u32
gb_fnv32a(void const *data, isize len)
{
isize i;
u32 h = 0x811c9dc5;
u8 const *c = cast(u8 const *)data;
for (i = 0; i < len; i++)
h = (h ^ c[i]) * 0x01000193;
return h;
}
u64
gb_fnv64a(void const *data, isize len)
{
isize i;
u64 h = 0xcbf29ce484222325ull;
u8 const *c = cast(u8 const *)data;
for (i = 0; i < len; i++)
h = (h ^ c[i]) * 0x100000001b3ll;
return h;
}
gb_inline u32 gb_murmur32(void const *data, isize len) { return gb_murmur32_seed(data, len, 0x9747b28c); }
gb_inline u64 gb_murmur64(void const *data, isize len) { return gb_murmur64_seed(data, len, 0x9747b28c); }
u32
gb_murmur32_seed(void const *data, isize len, u32 seed)
{
u32 const c1 = 0xcc9e2d51;
u32 const c2 = 0x1b873593;
u32 const r1 = 15;
u32 const r2 = 13;
u32 const m = 5;
u32 const n = 0xe6546b64;
isize i, nblocks = len / 4;
u32 hash = seed, k1 = 0;
u32 const *blocks = cast(u32 const*)data;
u8 const *tail = cast(u8 const *)(data) + nblocks*4;
for (i = 0; i < nblocks; i++) {
u32 k = blocks[i];
k *= c1;
k = (k << r1) | (k >> (32 - r1));
k *= c2;
hash ^= k;
hash = ((hash << r2) | (hash >> (32 - r2))) * m + n;
}
switch (len & 3) {
case 3:
k1 ^= tail[2] << 16;
case 2:
k1 ^= tail[1] << 8;
case 1:
k1 ^= tail[0];
k1 *= c1;
k1 = (k1 << r1) | (k1 >> (32 - r1));
k1 *= c2;
hash ^= k1;
}
hash ^= len;
hash ^= (hash >> 16);
hash *= 0x85ebca6b;
hash ^= (hash >> 13);
hash *= 0xc2b2ae35;
hash ^= (hash >> 16);
return hash;
}
u64
gb_murmur64_seed(void const *data_, isize len, u64 seed)
{
#if defined(GB_ARCH_64_BIT)
u64 const m = 0xc6a4a7935bd1e995ULL;
i32 const r = 47;
u64 h = seed ^ (len * m);
u64 const *data = cast(u64 const *)data_;
u8 const *data2 = cast(u8 const *)data_;
u64 const* end = data + (len / 8);
while (data != end) {
u64 k = *data++;
k *= m;
k ^= k >> r;
k *= m;
h ^= k;
h *= m;
}
switch (len & 7) {
case 7: h ^= cast(u64)(data2[6]) << 48;
case 6: h ^= cast(u64)(data2[5]) << 40;
case 5: h ^= cast(u64)(data2[4]) << 32;
case 4: h ^= cast(u64)(data2[3]) << 24;
case 3: h ^= cast(u64)(data2[2]) << 16;
case 2: h ^= cast(u64)(data2[1]) << 8;
case 1: h ^= cast(u64)(data2[0]);
h *= m;
};
h ^= h >> r;
h *= m;
h ^= h >> r;
return h;
#else
u64 h;
u32 const m = 0x5bd1e995;
i32 const r = 24;
u32 h1 = cast(u32)(seed) ^ cast(u32)(len);
u32 h2 = cast(u32)(seed >> 32);
u32 const *data = cast(u32 const *)data_;
while (len >= 8) {
u32 k1, k2;
k1 = *data++;
k1 *= m;
k1 ^= k1 >> r;
k1 *= m;
h1 *= m;
h1 ^= k1;
len -= 4;
k2 = *data++;
k2 *= m;
k2 ^= k2 >> r;
k2 *= m;
h2 *= m;
h2 ^= k2;
len -= 4;
}
if (len >= 4) {
u32 k1 = *data++;
k1 *= m;
k1 ^= k1 >> r;
k1 *= m;
h1 *= m;
h1 ^= k1;
len -= 4;
}
switch (len) {
case 3: h2 ^= (cast(u8 const *)data)[2] << 16;
case 2: h2 ^= (cast(u8 const *)data)[1] << 8;
case 1: h2 ^= (cast(u8 const *)data)[0] << 0;
h2 *= m;
};
h1 ^= h2 >> 18;
h1 *= m;
h2 ^= h1 >> 22;
h2 *= m;
h1 ^= h2 >> 17;
h1 *= m;
h2 ^= h1 >> 19;
h2 *= m;
h = h1;
h = (h << 32) | h2;
return h;
#endif
}
/***************************************************************
*
* Hash Table
*
*/
gb_inline void
gb_hash_table_init(gbHashTable *h, gbAllocator a)
{
gb_array_init(h->hashes, a);
gb_array_init(h->entries, a);
}
gb_inline void
gb_hash_table_free(gbHashTable *h)
{
gb_array_free(&h->hashes);
gb_array_free(&h->entries);
}
typedef struct gbprivFindResult {
isize hash_index;
isize data_prev;
isize entry_index;
} gbprivFindResult;
gbprivFindResult const GB__INVALID_FIND_RESULT = {-1, -1, -1};
gbprivFindResult
gb__find_result_from_key(gbHashTable const *h, u64 key)
{
gbprivFindResult fr = GB__INVALID_FIND_RESULT;
if (gb_array_count(h->hashes) == 0)
return fr;
fr.hash_index = key % gb_array_count(h->hashes);
fr.entry_index = h->hashes[fr.hash_index];
while (fr.entry_index >= 0) {
if (h->entries[fr.entry_index].key == key)
return fr;
fr.data_prev = fr.entry_index;
fr.entry_index = h->entries[fr.entry_index].next;
}
return fr;
}
gb_inline b32
gb_hash_table_has(gbHashTable const *h, u64 key)
{
return gb__find_result_from_key(h, key).entry_index >= 0;
}
gb_inline void *
gb_hash_table_get(gbHashTable const *h, u64 key, void *default_value)
{
isize index = gb__find_result_from_key(h, key).entry_index;
if (index < 0)
return default_value;
return h->entries[index].value;
}
gb_internal gb_inline isize
gb__hash_table_add_entry(gbHashTable *h, u64 key)
{
isize i = gb_array_count(h->entries);
gbHashTableEntry e = {0};
e.key = key;
e.next = -1;
gb_array_append(h->entries, e);
return i;
}
gb_internal gb_inline isize
gb__hash_table_is_full(gbHashTable *h)
{
f64 const MAXIMUM_LOAD_COEFFICIENT = 0.75;
return gb_array_count(h->entries) >= MAXIMUM_LOAD_COEFFICIENT * gb_array_count(h->hashes);
}
gb_internal gb_inline void gb__hash_table_grow(gbHashTable *h);
gb_inline void
gb_multi_hash_table_insert(gbHashTable *h, u64 key, void *value)
{
gbprivFindResult fr;
isize next;
if (gb_array_count(h->hashes) == 0)
gb__hash_table_grow(h);
fr = gb__find_result_from_key(h, key);
next = gb__hash_table_add_entry(h, key);
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = next;
else
h->entries[fr.data_prev].next = next;
h->entries[next].next = fr.entry_index;
h->entries[next].value = value;
if (gb__hash_table_is_full(h))
gb__hash_table_grow(h);
}
gb_inline void
gb_multi_hash_table_get(gbHashTable const *h, u64 key, void **values, isize count)
{
isize i = 0;
gbHashTableEntry const *e = gb_multi_hash_table_find_first_entry(h, key);
while (e && count --> 0) {
values[i++] = e->value;
e = gb_multi_hash_table_find_next_entry(h, e);
}
}
gb_inline isize
gb_multi_hash_table_count(gbHashTable const *h, u64 key)
{
isize count = 0;
gbHashTableEntry const *e = gb_multi_hash_table_find_first_entry(h, key);
while (e) {
count++;
e = gb_multi_hash_table_find_next_entry(h, e);
}
return count;
}
gbHashTableEntry const *
gb_multi_hash_table_find_first_entry(gbHashTable const *h, u64 key)
{
isize index = gb__find_result_from_key(h, key).entry_index;
if (index < 0) return NULL;
return &h->entries[index];
}
gbHashTableEntry const *
gb_multi_hash_table_find_next_entry(gbHashTable const *h, gbHashTableEntry const *e)
{
if (e) {
isize index = e->next;
while (index >= 0) {
if (h->entries[index].key == e->key)
return &h->entries[index];
index = h->entries[index].next;
}
}
return NULL;
}
void
gb__hash_table_erase_find_result(gbHashTable *h, gbprivFindResult fr)
{
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = h->entries[fr.entry_index].next;
else
h->entries[fr.data_prev].next = h->entries[fr.entry_index].next;
gb_array_pop(&h->entries);
if (fr.entry_index != gb_array_count(h->entries)) {
gbprivFindResult last;
h->entries[fr.entry_index] = h->entries[gb_array_count(h->entries)];
last = gb__find_result_from_key(h, h->entries[fr.entry_index].key);
if (last.data_prev < 0)
h->hashes[last.hash_index] = fr.entry_index;
else
h->entries[last.entry_index].next = fr.entry_index;
}
}
gb_inline void
gb_multi_hash_table_remove_entry(gbHashTable *h, gbHashTableEntry const *e)
{
gbprivFindResult fr = GB__INVALID_FIND_RESULT;
if (gb_array_count(h->hashes) && e) {
fr.hash_index = e->key % gb_array_count(h->hashes);
fr.entry_index = h->hashes[fr.hash_index];
while (fr.entry_index >= 0) {
if (&h->entries[fr.entry_index] == e)
break;
fr.data_prev = fr.entry_index;
fr.entry_index = h->entries[fr.entry_index].next;
}
}
if (fr.entry_index >= 0)
gb__hash_table_erase_find_result(h, fr);
}
gb_inline void
gb_multi_hash_table_remove_all(gbHashTable *h, u64 key)
{
while (gb_hash_table_has(h, key))
gb_hash_table_remove(h, key);
}
void
gb__rehash(gbHashTable *h, isize new_capacity)
{
gbHashTable nh, empty;
isize i;
gb_hash_table_init(&nh, gb_array_allocator(h->hashes));
gb_array_resize(nh.hashes, new_capacity);
gb_array_reserve(nh.entries, gb_array_count(h->entries));
for (i = 0; i < new_capacity; i++)
nh.hashes[i] = -1;
for (i = 0; i < gb_array_count(h->entries); i++) {
gbHashTableEntry *e = &h->entries[i];
gb_multi_hash_table_insert(&nh, e->key, e->value);
}
gb_hash_table_init(&empty, gb_array_allocator(h->hashes));
gb_hash_table_free(h);
gb_memcopy(&nh, &h, gb_size_of(gbHashTable));
gb_memcopy(&empty, &nh, gb_size_of(gbHashTable));
}
gb_internal gb_inline void
gb__hash_table_grow(gbHashTable *h)
{
isize new_capacity = GB_ARRAY_GROW_FORMULA(gb_array_count(h->entries));
gb__rehash(h, new_capacity);
}
isize
gb__find_or_make_entry(gbHashTable *h, u64 key)
{
isize index;
gbprivFindResult fr = gb__find_result_from_key(h, key);
if (fr.entry_index >= 0)
return fr.entry_index;
index = gb__hash_table_add_entry(h, key);
if (fr.data_prev < 0)
h->hashes[fr.hash_index] = index;
else
h->entries[fr.data_prev].next = index;
return index;
}
gb_inline void
gb_hash_table_set(gbHashTable *h, u64 key, void *value)
{
isize i;
if (gb_array_count(h->hashes) == 0)
gb__hash_table_grow(h);
i = gb__find_or_make_entry(h, key);
h->entries[i].value = value;
if (gb__hash_table_is_full(h))
gb__hash_table_grow(h);
}
gb_inline void
gb_hash_table_remove(gbHashTable *h, u64 key)
{
gbprivFindResult fr = gb__find_result_from_key(h, key);
if (fr.entry_index >= 0)
gb__hash_table_erase_find_result(h, fr);
}
gb_inline void
gb_hash_table_reserve(gbHashTable *h, isize capacity)
{
gb__rehash(h, capacity);
}
gb_inline void
gb_hash_table_clear(gbHashTable *h)
{
gb_array_clear(&h->hashes);
gb_array_clear(&h->entries);
}
/***************************************************************
*
* File Handling
*
*/
b32
gb_file_create(gbFile *file, char const *filepath, ...)
{
va_list va;
char *path;
gb_zero_struct(file);
va_start(va, filepath);
path = gb_sprintf_va(filepath, va);
va_end(va);
file->handle = fopen(path, "wb");
if (file->handle) {
file->path = gb_alloc_str(gb_heap_allocator(), path);
file->size = gb_file_size(file);
file->is_open = true;
file->access = GB_FILE_ACCESS_WRITE;
file->last_write_time = gb_file_last_write_time("%s", file->path);
return true;
}
return false;
}
b32
gb_file_open(gbFile *file, char const *filepath, ...)
{
va_list va;
char *path;
gb_zero_struct(file);
va_start(va, filepath);
path = gb_sprintf_va(filepath, va);
va_end(va);
file->handle = fopen(path, "rb");
if (file->handle) {
file->path = gb_alloc_str(gb_heap_allocator(), path);
file->size = gb_file_size(file);
file->is_open = true;
file->access = GB_FILE_ACCESS_READ;
file->type = GB_FILE_TYPE_UNKNOWN;
#if defined(_MSC_VER)
{
struct _stat64 st;
if (_stat64(path, &st) == 0) {
if ((st.st_mode & _S_IFREG) != 0)
file->type = GB_FILE_TYPE_FILE;
else if ((st.st_mode & _S_IFDIR) != 0)
file->type = GB_FILE_TYPE_DIRECTORY;
}
}
#else
{
struct stat64 st;
if (stat64(path, &st) == 0) {
if ((st.st_mode & S_IFREG) != 0)
file->type = GB_FILE_TYPE_FILE;
else if ((st.st_mode & S_IFDIR) != 0)
file->type = GB_FILE_TYPE_DIRECTORY;
}
}
#endif
file->last_write_time = gb_file_last_write_time("%s", file->path);
return true;
}
return false;
}
gb_inline b32
gb_file_close(gbFile *file)
{
b32 result = true;
if (file && file->handle)
result = fclose(cast(FILE *)file->handle) != 0; /* TODO(bill): Handle fclose errors */
if (file->path) gb_free(gb_heap_allocator(), file->path);
file->is_open = false;
return result;
}
gb_inline b32
gb_file_read_at(gbFile *file, void *buffer, isize size, i64 offset)
{
i64 prev_cursor_pos;
GB_ASSERT(file->access == GB_FILE_ACCESS_READ);
prev_cursor_pos = ftell(cast(FILE *)file->handle);
fseek(cast(FILE *)file->handle, offset, SEEK_SET);
fread(buffer, 1, size, cast(FILE *)file->handle);
fseek(cast(FILE *)file->handle, prev_cursor_pos, SEEK_SET);
return true;
}
gb_inline b32
gb_file_write_at(gbFile *file, void const *buffer, isize size, i64 offset)
{
isize written_size;
i64 prev_cursor_pos;
GB_ASSERT(file->access == GB_FILE_ACCESS_WRITE);
prev_cursor_pos = ftell(cast(FILE *)file->handle);
fseek(cast(FILE *)file->handle, offset, SEEK_SET);
written_size = fwrite(buffer, 1, size, cast(FILE *)file->handle);
fseek(cast(FILE *)file->handle, prev_cursor_pos, SEEK_SET);
if (written_size != size) {
GB_PANIC("Failed to write file data");
return false;
}
return true;
}
gb_inline i64
gb_file_size(gbFile *file)
{
i64 result_size;
fseek(cast(FILE *)file->handle, 0, SEEK_END);
result_size = cast(i64)ftell(cast(FILE *)file->handle);
fseek(cast(FILE *)file->handle, 0, SEEK_SET);
return result_size;
}
b32
gb_file_has_changed(gbFile *file)
{
b32 result = false;
gbFileTime last_write_time = gb_file_last_write_time("%s", file->path);
if (file->last_write_time != last_write_time) {
result = true;
file->last_write_time = last_write_time;
}
return result;
}
#if defined(GB_SYSTEM_WINDOWS)
gbFileTime
gb_file_last_write_time(char const *filepath, ...)
{
ULARGE_INTEGER li = {0};
FILETIME last_write_time = {0};
WIN32_FILE_ATTRIBUTE_DATA data = {0};
va_list va;
va_start(va, filepath);
if (GetFileAttributesExA(gb_sprintf_va(filepath, va), GetFileExInfoStandard, &data))
last_write_time = data.ftLastWriteTime;
va_end(va);
li.LowPart = last_write_time.dwLowDateTime;
li.HighPart = last_write_time.dwHighDateTime;
return cast(gbFileTime)li.QuadPart;
}
gb_inline b32
gb_file_copy(char const *existing_filename, char const *new_filename, b32 fail_if_exists)
{
return CopyFileA(existing_filename, new_filename, fail_if_exists);
}
gb_inline b32
gb_file_move(char const *existing_filename, char const *new_filename)
{
return MoveFileA(existing_filename, new_filename);
}
#else
gbFileTime
gb_file_last_write_time(char const *filepath, ...)
{
time_t result = 0;
struct stat file_stat;
va_list va;
va_start(va, filepath);
if (stat(gb_sprintf_va(filepath, va), &file_stat)) {
result = file_stat.st_mtimespec.tv_sec;
}
va_end(va);
return cast(gbFileTime)result;
}
gb_inline b32
gb_file_copy(char const *existing_filename, char const *new_filename, b32 fail_if_exists)
{
GB_PANIC("TODO(bill): Implement");
return false;
}
gb_inline b32
gb_file_move(char const *existing_filename, char const *new_filename)
{
GB_PANIC("TODO(bill): Implement");
return false;
}
#endif
gbFileContents
gb_file_read_contents(gbAllocator a, b32 zero_terminate, char const *filepath, ...)
{
gbFileContents result = {0};
gbFile file = {0};
char *path;
va_list va;
va_start(va, filepath);
path = gb_sprintf_va(filepath, va);
va_end(va);
if (gb_file_open(&file, "%s", path)) {
i64 file_size = gb_file_size(&file);
if (file_size > 0) {
result.data = gb_alloc(a, zero_terminate ? file_size+1 : file_size);
result.size = file_size;
gb_file_read_at(&file, result.data, result.size, 0);
if (zero_terminate) {
u8 *str = cast(u8 *)result.data;
str[file_size] = '\0';
}
}
gb_file_close(&file);
}
return result;
}
gb_inline b32
gb_path_is_absolute(char const *path)
{
b32 result = false;
GB_ASSERT_NOT_NULL(path);
#if defined(GB_SYSTEM_WINDOWS)
result == (gb_strlen(path) > 2) &&
gb_char_is_alpha(path[0]) &&
(path[1] == ':' && path[2] == GB_PATH_SEPARATOR);
#else
result = (gb_strlen(path) > 0 && path[0] == GB_PATH_SEPARATOR);
#endif
return result;
}
gb_inline b32 gb_path_is_relative(char const *path) { return !gb_path_is_absolute(path); }
gb_inline b32
gb_path_is_root(char const *path)
{
b32 result = false;
GB_ASSERT_NOT_NULL(path);
#if defined(GB_SYSTEM_WINDOWS)
result = gb_path_is_absolute(path) && gb_strlen(path) == 3;
#else
result = gb_path_is_absolute(path) && gb_strlen(path) == 1;
#endif
return result;
}
gb_inline char const *
gb_path_base_name(char const *path)
{
char const *ls;
GB_ASSERT_NOT_NULL(path);
ls = gb_char_last_occurence(path, '/');
return (ls == NULL) ? path : ls+1;
}
gb_inline char const *
gb_path_extension(char const *path)
{
char const *ld;
GB_ASSERT_NOT_NULL(path);
ld = gb_char_last_occurence(path, '.');
return (ld == NULL) ? NULL : ld+1;
}
/***************************************************************
*
* DLL Handling
*
*/
#if defined(GB_SYSTEM_WINDOWS)
gbDllHandle
gb_dll_load(char const *filepath, ...)
{
gb_local_persist char buffer[512];
va_list va;
va_start(va, filepath);
gb_snprintf_va(buffer, gb_size_of(buffer), filepath, va);
va_end(va);
return cast(gbDllHandle)LoadLibraryA(buffer);
}
gb_inline void gb_dll_unload (gbDllHandle dll) { FreeLibrary(cast(HMODULE)dll); }
gb_inline gbDllProc gb_dll_proc_address(gbDllHandle dll, char const *proc_name) { return cast(gbDllProc)GetProcAddress(cast(HMODULE)dll, proc_name); }
#else
gbDllHandle
gb_dll_load(char const *filepath, ...)
{
gb_local_persist char buffer[512];
va_list va;
va_start(va, filepath);
gb_snprintf_va(buffer, gb_size_of(buffer), filepath, va);
va_end(va);
/* TODO(bill): Should this be RTLD_LOCAL? */
return cast(gbDllHandle)dlopen(buffer, RTLD_LAZY|RTLD_GLOBAL);
}
gb_inline void gb_dll_unload (gbDllHandle dll) { dlclose(dll); }
gb_inline gbDllProc gb_dll_proc_address(gbDllHandle dll, char const *proc_name) { return cast(gbDllProc)dlsym(dll, proc_name); }
#endif
/***************************************************************
*
* Time
*
*/
#if defined(_MSC_VER) && !defined(__clang__)
gb_inline u64 gb_rdtsc(void) { return __rdtsc(); }
#elif defined(__i386__)
gb_inline u64
gb_rdtsc(void)
{
u64 x;
__asm__ volatile (".byte 0x0f, 0x31" : "=A" (x));
return x;
}
#elif defined(__x86_64__)
gb_inline u64
gb_rdtsc(void)
{
u32 hi, lo;
__asm__ __volatile__ ("rdtsc" : "=a"(lo), "=d"(hi));
return (cast(u64)lo) | ((cast(u64)hi)<<32);
}
#elif defined(__powerpc__)
gb_inline u64
gb_rdtsc(void)
{
u64 result = 0;
u32 upper, lower,tmp;
__asm__ volatile(
"0: \n"
"\tmftbu %0 \n"
"\tmftb %1 \n"
"\tmftbu %2 \n"
"\tcmpw %2,%0 \n"
"\tbne 0b \n"
: "=r"(upper),"=r"(lower),"=r"(tmp)
);
result = upper;
result = result<<32;
result = result|lower;
return result;
}
#endif
#if defined(GB_SYSTEM_WINDOWS)
gb_inline f64
gb_time_now(void)
{
gb_local_persist LARGE_INTEGER win32_perf_count_freq = {0};
f64 result;
LARGE_INTEGER counter;
if (!win32_perf_count_freq.QuadPart) {
QueryPerformanceFrequency(&win32_perf_count_freq);
GB_ASSERT(win32_perf_count_freq.QuadPart != 0);
}
QueryPerformanceCounter(&counter);
result = counter.QuadPart / cast(f64)(win32_perf_count_freq.QuadPart);
return result;
}
gb_inline void gb_sleep_ms(u32 ms) { Sleep(ms); }
#else
gb_global f64 gb__timebase = 0.0;
gb_global u64 gb__timestart = 0;
gb_inline f64
gb_time_now(void)
{
struct timespec t;
f64 result;
if (!gb__timestart) {
mach_timebase_info_data_t tb = {0};
mach_timebase_info(&tb);
gb__timebase = tb.numer;
gb__timebase /= tb.denom;
gb__timestart = mach_absolute_time();
}
result = (mach_absolute_time() - gb__timestart) * gb__timebase;
return result;
}
gb_inline void
gb_sleep_ms(u32 ms)
{
timespec req = {cast(time_t)ms/1000, cast(long)((ms%1000)*1000000)};
timespec rem = {0, 0};
nanosleep(&req, &rem);
}
#endif
/***************************************************************
*
* Miscellany
*
*/
#if defined(GB_SYSTEM_WINDOWS)
gb_inline void gb_exit(u32 code) { ExitProcess(code); }
#else
gb_inline void gb_exit(u32 code) { exit(code); }
#endif
gb_inline void
gb_yield(void)
{
#if defined(GB_SYSTEM_WINDOWS)
Sleep(0);
#else
sched_yield();
#endif
}
gb_inline void
gb_set_env(char const *name, char const *value)
{
#if defined(GB_SYSTEM_WINDOWS)
SetEnvironmentVariableA(name, value);
#else
setenv(name, value, 1);
#endif
}
gb_inline void
gb_unset_env(char const *name)
{
#if defined(GB_SYSTEM_WINDOWS)
SetEnvironmentVariableA(name, NULL);
#else
unsetenv(name);
#endif
}
gb_inline i32
gb_chdir(char const *path)
{
#if defined(_MSC_VER)
return _chdir(path);
#else
return chdir(path);
#endif
}
gb_inline void
gb_get_working_cmd(char *buffer, isize len)
{
#if defined(_MSC_VER)
_getcwd(buffer, cast(i32)len);
#else
getcwd(buffer, len);
#endif
}
gb_inline u16
gb_endian_swap16(u16 i)
{
return (i>>8) | (i<<8);
}
gb_inline u32
gb_endian_swap32(u32 i)
{
return (i>>24) |(i<<24) |
((i&0x00ff0000)>>8) | ((i&0x0000ff00)<<8);
}
gb_inline u64
gb_endian_swap64(u64 i)
{
/* TODO(bill): Do I really need the cast here? */
return (i>>56) | (i<<56) |
((i&cast(u64)0x00ff000000000000)>>40) | ((i&cast(u64)0x000000000000ff00)<<40) |
((i&cast(u64)0x0000ff0000000000)>>24) | ((i&cast(u64)0x0000000000ff0000)<<24) |
((i&cast(u64)0x000000ff00000000)>>8) | ((i&cast(u64)0x00000000ff000000)<<8);
}
/***************************************************************
*
* Colour Type
* It's quite useful
*/
#if !defined(GB_NO_COLOUR_TYPE)
gb_inline gbColour
gb_colour(f32 r, f32 g, f32 b, f32 a)
{
gbColour result;
result.r = cast(u8)(gb_clamp01(r) * 255.0f);
result.g = cast(u8)(gb_clamp01(g) * 255.0f);
result.b = cast(u8)(gb_clamp01(b) * 255.0f);
result.a = cast(u8)(gb_clamp01(a) * 255.0f);
return result;
}
#endif
#if defined(__GCC__) || defined(__GNUC__)
#pragma GCC diagnostic pop
#endif
#if defined(__cplusplus)
}
#endif
#endif /* GB_IMPLEMENTATION */
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