/* gb.h - v0.04 - 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 // Comments Never use _t suffix for types (I think they are stupid...) Version History: 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 __declspec(dllexport) #endif #ifndef GB_DLL_IMPORT #define GB_DLL_IMPORT __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 #include #include #include // TODO(bill): Remove and replace with OS Specific stuff #include // NOTE(bill): For memcpy, memmove, memcmp, etc. #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 #else #error Add OS Specific headers #endif #if !defined(GB_NO_STDLIB) #include #endif #ifndef gb_malloc #define gb_malloc(sz) malloc(sz) #endif #ifndef gb_mfree #define gb_mfree(ptr) free(ptr) #endif //////////////////////////////////////////////////////////////// // // Base Types // // #if defined(_MSC_VER) typedef unsigned __int8 u8; typedef signed __int8 i8; typedef unsigned __int16 u16; typedef signed __int16 i16; typedef unsigned __int32 u32; typedef signed __int32 i32; typedef unsigned __int64 u64; typedef signed __int64 i64; #else #include 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)); typedef uintptr_t uintptr; typedef intptr_t intptr; typedef float f32; typedef double f64; GB_STATIC_ASSERT(sizeof(f32) == 4); GB_STATIC_ASSERT(sizeof(f64) == 8); 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): Get true and false #if !defined(__cplusplus) #if defined(_MSC_VER) && _MSC_VER <= 1800 #ifndef false #define false 0 #endif #ifndef true #define true 1 #endif #else #include #endif #endif #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 #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 #if !defined(__cplusplus) && defined(_MSC_VER) && _MSC_VER <= 1800 #define inline __inline #endif #if !defined(gb_inline) #if defined(_MSC_VER) #define gb_restrict __restrict #else #define gb_restrict 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) #define gb_inline __forceinline #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 struct gbAlignment_Trick { char c; T member; }; #define gb_align_of(Type) gb_offset_of(gbAlignment_Trick, 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 which 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) extern "C++" { namespace gb { // NOTE(bill): Stupid fucking templates template struct RemoveReference { typedef T Type; }; template struct RemoveReference { typedef T Type; }; template struct RemoveReference { 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 inline T &&forward(typename RemoveReference::Type &t) { return static_cast(t); } template inline T &&forward(typename RemoveReference::Type &&t) { return static_cast(t); } template inline T &&move(T &&t) { return static::Type &&>(t); } template struct privDefer { F f; privDefer(F &&f) : f(forward(f)) {} ~privDefer() { f(); } }; template privDefer priv_defer_func(F &&f) { return privDefer(forward(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_JOIN3_IND(a, b, c) a##b##c #define GB_JOIN2(a, b) GB_JOIN2_IND(a, b) #define GB_JOIN3(a, b, c) GB_JOIN3_IND(a, b, c) #endif #ifndef GB_BIT #define GB_BIT(x) (1< (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 #define gb_is_between(x, lower, upper) (((x) >= (lower)) && ((x) <= (upper))) //////////////////////////////// // // Debug // // #ifndef GB_DEBUG_TRAP #if defined(_MSC_VER) #define GB_DEBUG_TRAP() __debugbreak() #else #define GB_DEBUG_TRAP() __builtin_trap() #endif #endif // TODO(bill): This relies upon variadic macros which are not supported in MSVC 2003 and below, check for it if needed #ifndef GB_ASSERT_MSG #define GB_ASSERT_MSG(cond, msg, ...) do { \ if (!(cond)) { \ gb_assert_handler(#cond, __FILE__, cast(i64)__LINE__, msg, ##__VA_ARGS__); \ 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 #ifndef GB_PANIC #define GB_PANIC(msg, ...) GB_ASSERT_MSG(0, msg, ##__VA_ARGS__) #endif GB_DEF void gb_assert_handler(char const *condition, char const *file, i64 line, char const *msg, ...); //////////////////////////////// // // Printing // // // 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 // TODO(bill): Should I completely rename these functions as they are a little weird to begin with? 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 // // #ifndef gb_align_to #define gb_align_to(value, alignment) (((value) + ((alignment)-1)) & ~((alignment) - 1)) #endif #ifndef gb_is_power_of_two #define gb_is_power_of_two(x) ((x) != 0) && !((x) & ((x)-1)) #endif 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 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)[0])*count) #endif GB_DEF void *gb_memcopy(void *dest, void const *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 typedef struct gbAtomic32 { i32 volatile value; } gbAtomic32; typedef struct gbAtomic64 { i64 volatile value; } gbAtomic64; GB_DEF i32 gb_load_atomic32(gbAtomic32 const volatile *a); GB_DEF void gb_store_atomic32(gbAtomic32 volatile *a, i32 value); GB_DEF i32 gb_compare_exchange_strong_atomic32(gbAtomic32 volatile *a, i32 expected, i32 desired); GB_DEF i32 gb_exchanged_atomic32(gbAtomic32 volatile *a, i32 desired); GB_DEF i32 gb_fetch_add_atomic32(gbAtomic32 volatile *a, i32 operand); GB_DEF i32 gb_fetch_and_atomic32(gbAtomic32 volatile *a, i32 operand); GB_DEF i32 gb_fetch_or_atomic32(gbAtomic32 volatile *a, i32 operand); GB_DEF i64 gb_load_atomic64(gbAtomic64 const volatile *a); GB_DEF void gb_store_atomic64(gbAtomic64 volatile *a, i64 value); GB_DEF i64 gb_compare_exchange_strong_atomic64(gbAtomic64 volatile *a, i64 expected, i64 desired); GB_DEF i64 gb_exchanged_atomic64(gbAtomic64 volatile *a, i64 desired); GB_DEF i64 gb_fetch_add_atomic64(gbAtomic64 volatile *a, i64 operand); GB_DEF i64 gb_fetch_and_atomic64(gbAtomic64 volatile *a, i64 operand); GB_DEF i64 gb_fetch_or_atomic64(gbAtomic64 volatile *a, i64 operand); typedef struct gbMutex { #if defined(GB_SYSTEM_WINDOWS) HANDLE win32_handle; #else pthread_mutex_t posix_handle; #endif } gbMutex; GB_DEF void gb_init_mutex(gbMutex *m); GB_DEF void gb_destroy_mutex(gbMutex *m); GB_DEF void gb_lock_mutex(gbMutex *m); GB_DEF b32 gb_try_lock_mutex(gbMutex *m); GB_DEF void gb_unlock_mutex(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 #if 0 gbMutex m = {0}; gb_mutex_init(&m); { gb_mutex_lock(&m); defer (gb_mutex_unlock(&m)); // Do whatever } #endif typedef struct gbSemaphore { #if defined(GB_SYSTEM_WINDOWS) HANDLE win32_handle; #else gbMutex mutex; pthread_cond_t cond; i32 count; #endif } gbSemaphore; GB_DEF void gb_init_semaphore(gbSemaphore *s); GB_DEF void gb_destroy_semaphore(gbSemaphore *s); GB_DEF void gb_post_semaphore(gbSemaphore *s, i32 count); GB_DEF void gb_wait_semaphore(gbSemaphore *s); #define GB_THREAD_PROC(name) void name(void *data) ;typedef GB_THREAD_PROC(gbThreadProc); typedef struct gbThread { #if defined(GB_SYSTEM_WINDOWS) HANDLE 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_init_thread(gbThread *t); GB_DEF void gb_destory_thread(gbThread *t); GB_DEF void gb_start_thread(gbThread *t, gbThreadProc *proc, void *data); GB_DEF void gb_start_thread_with_stack(gbThread *t, gbThreadProc *proc, void *data, isize stack_size); GB_DEF void gb_join_thread(gbThread *t); GB_DEF b32 gb_is_thread_running(gbThread const *t); GB_DEF u32 gb_current_thread_id(void); //////////////////////////////////////////////////////////////// // // Virtual Memory // // #if 0 typedef enum gbVmAllocationFlag { GB_VM_COMMIT = GB_BIT(1), GB_VM_RESERVE = GB_BIT(2), GB_VM_RESET = GB_BIT(3), GB_VM_RESET_UNDO = GB_BIT(4), } gbVmAllocationFlag; typedef enum gbVmProtectionFlag { GB_VM_PAGE_NO_ACCESS = GB_BIT(1), GB_VM_PAGE_GUARD = GB_BIT(2), GB_VM_PAGE_NO_CACHE = GB_BIT(3), GB_VM_PAGE_WRITE_COMBINE = GB_BIT(4), } gbVmProtectionFlag; typedef enum gbVmFreeType { GB_VM_RELEASE = GB_BIT(1), GB_VM_DECOMMIT = GB_BIT(2), } gbVmFreeType; typedef struct gbVirtualMemory { void *memory; isize size; u32 allocation_flags; u32 protection_flags; } gbVirtualMemory; GB_DEF gbVirtualMemory gb_vm_alloc(void *base_address, isize size, u32 allocation_flags, u32 protection_flags); GB_DEF void gb_vm_free(gbVirtualMemory *vm); #endif //////////////////////////////////////////////////////////////// // // 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); 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_cstring(gbAllocator a, char const *str); // NOTE(bill): These are very useful and the type case has saved me from numerous bugs #ifndef gb_alloc_struct #define gb_alloc_struct(allocator, Type) (Type *)gb_alloc_align(allocator, gb_size_of(Type)) #define gb_alloc_array(allocator, Type, count) (Type *)gb_alloc(allocator, gb_size_of(Type) * (count)) #endif GB_DEF gbAllocator gb_heap_allocator(void); GB_DEF GB_ALLOCATOR_PROC(gb_heap_allocator_proc); typedef struct gbArena { gbAllocator backing; void *physical_start; isize total_size; isize total_allocated; u32 temp_count; } gbArena; GB_DEF void gb_init_arena_from_memory(gbArena *arena, void *start, isize size); GB_DEF void gb_init_arena_from_allocator(gbArena *arena, gbAllocator backing, isize size); GB_DEF void gb_init_subarena(gbArena *arena, gbArena *parent_arena, isize size); GB_DEF void gb_free_arena(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_check_arena(gbArena *arena); 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_begin_temp_arena_memory(gbArena *arena); GB_DEF void gb_end_temp_arena_memory(gbTempArenaMemory tmp_mem); 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_init_pool(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size); GB_DEF void gb_init_pool_align(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size, isize block_align); GB_DEF void gb_free_pool(gbPool *pool); GB_DEF gbAllocator gb_pool_allocator(gbPool *pool); GB_DEF GB_ALLOCATOR_PROC(gb_pool_allocator_proc); //////////////////////////////////////////////////////////////// // // Sort & Search // // #define GB_COMPARE_PROC(name) int name(void const *a, void const *b) typedef GB_COMPARE_PROC(gbCompareProc); GB_DEF void gb_qsort(void *base, isize count, isize size, gbCompareProc compare_proc); // NOTE(bill): Returns index 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_is_char_space(char c); GB_DEF b32 gb_is_char_digit(char c); GB_DEF b32 gb_is_char_hex_digit(char c); GB_DEF b32 gb_is_char_alpha(char c); GB_DEF b32 gb_is_char_alphanumeric(char c); // 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 char * gb_strncpy(char *dest, char const *source, isize len); GB_DEF i32 gb_strncmp(char const *s1, char const *s2, isize len); GB_DEF isize gb_utf8_strlen(char const *str); GB_DEF isize gb_utf8_strnlen(char const *str, isize max_len); GB_DEF char const *gb_first_occurence_of_char(char const *s1, char c); GB_DEF char const *gb_last_occurence_of_char(char const *s1, char c); GB_DEF void gb_cstr_concat(char *dest, isize dest_len, char const *src_a, isize src_a_len, char const *src_b, isize src_b_len); //////////////////////////////////////////////////////////////// // // Windows UTF-8 Handling // // // 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 // // // Pascal like strings in C typedef char *gbString; // This is stored at the beginning of the string // NOTE(bill): If you only need a small string, just use a standard c string or change the size typedef struct gbStringHeader { gbAllocator allocator; isize length; isize capacity; } gbStringHeader; #define GB_STRING_HEADER(str) (cast(gbStringHeader *)(str) - 1) GB_DEF gbString gb_make_string(gbAllocator a, char const *str); GB_DEF gbString gb_make_string_length(gbAllocator a, void const *str, isize num_bytes); GB_DEF void gb_free_string(gbString str); GB_DEF gbString gb_duplicate_string(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_clear_string(gbString str); GB_DEF gbString gb_append_string(gbString str, gbString const other); GB_DEF gbString gb_append_string_length(gbString str, void const *other, isize num_bytes); GB_DEF gbString gb_append_cstring(gbString str, char const *other); GB_DEF gbString gb_set_string(gbString str, char const *cstr); GB_DEF gbString gb_make_space_for_string(gbString str, isize add_len); GB_DEF isize gb_string_allocation_size(gbString const str); GB_DEF b32 gb_are_strings_equal(gbString const lhs, gbString const rhs); GB_DEF gbString gb_trim_string(gbString str, char const *cut_set); GB_DEF gbString gb_trim_space_string(gbString str); /* Whitespace ` \t\r\n\v\f` */ ////////////////////////////////////////////////////////////////// // // Fixed Capacity Buffer (POD Types) // // #ifndef GB_BUFFER_TYPE #define GB_BUFFER_TYPE #endif #define gbBuffer(Type) struct { isize count, capacity; Type *data; } typedef gbBuffer(u8) gbByteBuffer; #define gb_init_buffer(x, allocator, cap) do { \ void **data = cast(void **)&((x)->data); \ gb_zero_struct(x); \ (x)->capacity = (cap); \ *data = gb_alloc((allocator), (cap)*gb_size_of((x)->data[0])); \ } while (0) #define gb_free_buffer(x, allocator) do { gb_free(allocator, (x)->data); } while (0) #define gb_append_buffer(x, item) do { (x)->data[(x)->count++] = item; } while (0) #define gb_appendv_buffer(x, items, item_count) do { \ GB_ASSERT(gb_size_of((items)[0]) == gb_size_of((x)->data[0])); \ GB_ASSERT((x)->count+item_count <= (x)->capacity); \ gb_memcopy((x)->data[a->count], (items), gb_size_of((x)->data[0])*(item_count)); \ (x)->count += (item_count); \ } while (0) #define gb_pop_buffer(x) do { GB_ASSERT((x)->count > 0); (x)->count--; } while (0) #define gb_clear_buffer(x) do { (x)->count = 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++! // NOTE(bill): Typedef every array or you get anonymous structures everywhere! // e.g. typedef gbArray(int) gb_Int_Array; #ifndef GB_ARRAY_TYPE #define GB_ARRAY_TYPE #define gbArray(Type) struct { gbAllocator allocator; isize count, capacity; Type *data; } typedef gbArray(void) gbVoidArray; // NOTE(bill): Useful for generic stuff // Available Procedures for gbArray(Type) // gb_init_array // gb_free_array // gb_set_array_capacity // gb_grow_array // gb_append_array // gb_appendv_array // gb_pop_array // gb_clear_array // gb_resize_array // gb_reserve_array // #define gb_init_array(x, allocator_) do { gb_zero_struct(x); (x)->allocator = allocator_; } while (0) #define gb_free_array(x) do { \ if ((x)->allocator.proc) { \ gbAllocator a = (x)->allocator; \ gb_free(a, (x)->data); \ gb_init_array((x), a); \ } \ } while (0) #define gb_set_array_capacity(array, capacity) gb__set_array_capacity((array), (capacity), gb_size_of((array)->data[0])) // NOTE(bill): Do not use the thing below directly, use the macro GB_DEF void gb__set_array_capacity(void *array, isize capacity, isize element_size); #ifndef GB_ARRAY_GROW_FORMULA #define GB_ARRAY_GROW_FORMULA(x) (2*(x) + 8) #endif // TODO(bill): Decide on a decent growing formula for gbArray #define gb_grow_array(x, min_capacity) do { \ isize capacity = GB_ARRAY_GROW_FORMULA((x)->capacity); \ if (capacity < (min_capacity)) \ capacity = (min_capacity); \ gb_set_array_capacity(x, capacity); \ } while (0) #define gb_append_array(x, item) do { \ if ((x)->capacity < (x)->count+1) \ gb_grow_array(x, 0); \ (x)->data[(x)->count++] = (item); \ } while (0) #define gb_appendv_array(x, items, item_count) do { \ GB_ASSERT(gb_size_of((items)[0]) == gb_size_of((x)->data[0])); \ if ((x)->capacity < (x)->count+(item_count)) \ gb_grow_array(x, (x)->count+(item_count)); \ gb_memcopy((x)->data[(x)->count], (items), gb_size_of((x)->data[0])*(item_count)); \ (x)->count += (item_count); \ } while (0) #define gb_pop_array(x) do { GB_ASSERT((x)->count > 0); (x)->count--; } while (0) #define gb_clear_array(x) do { (x)->count = 0; } while (0) #define gb_resize_array(x, count) do { \ if ((x)->capacity < (count)) \ gb_grow_array(x, count); \ (x)->count = (count); \ } while (0) #define gb_reserve_array(x, new_capacity) do { \ if ((x)->capacity < (new_capacity)) \ gb_set_array_capacity(x, new_capacity); \ } while (0) #endif /* GB_ARRAY_TYPE */ //////////////////////////////////////////////////////////////// // // File Handling // // typedef u64 gbFileTime; typedef enum gbFileType { GB_FILE_TYPE_READ = 1, GB_FILE_TYPE_WRITE = 2, } gbFileType; typedef struct gbFile { void *handle; // File to fread/fwrite char *path; i64 size; b32 is_open; gbFileType type; gbFileTime last_write_time; } gbFile; typedef struct gbFileContents { void *data; isize size; } gbFileContents; GB_DEF b32 gb_create_file(gbFile *file, char const *filepath, ...); // TODO(bill): Give file permissions GB_DEF b32 gb_open_file(gbFile *file, char const *filepath, ...); GB_DEF b32 gb_close_file(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_has_file_changed(gbFile *file); GB_DEF gbFileTime gb_file_last_write_time(char const *filepath, ...); GB_DEF b32 gb_copy_file(char const *existing_filename, char const *new_filename, b32 fail_if_exists); GB_DEF b32 gb_move_file(char const *existing_filename, char const *new_filename); GB_DEF gbFileContents gb_read_entire_file_contents(gbAllocator a, b32 zero_terminate, char const *filepath, ...); #ifndef GB_PATH_SEPARATOR #if defined(GB_SYSTEM_WINDOWS) #define GB_PATH_SEPARATOR '\\' #else #define GB_PATH_SEPARATOR '/' #endif #endif GB_DEF b32 gb_is_path_absolute(char const *path); GB_DEF b32 gb_is_path_relative(char const *path); GB_DEF b32 gb_is_path_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); GB_DEF void gb_exit(u32 code); //////////////////////////////////////////////////////////////// // // DLL Handling // // typedef void *gbDllHandle; typedef void (*gbDllProc)(void); GB_DEF gbDllHandle gb_load_dll(char const *filepath, ...); GB_DEF void gb_unload_dll(gbDllHandle dll); GB_DEF gbDllProc gb_dll_proc_address(gbDllHandle dll, char const *proc_name); //////////////////////////////////////////////////////////////// // // Time // // typedef struct gbDate { i32 year; i32 month; // 1 - Janurary, ... 12 - December i32 day; // 1 - 31 i32 day_of_week; // 0 - Sunday, ... 6 - Saturday i32 hour; // 0 - 23 i32 minute; // 0 - 59 i32 second; // 0 - 60 (leap seconds) i32 milliseconds; // 0 - 999 } gbDate; GB_DEF u64 gb_rdtsc(void); GB_DEF f64 gb_time_now(void); GB_DEF void gb_get_system_date(gbDate *date); GB_DEF void gb_get_local_date(gbDate *date); //////////////////////////////////////////////////////////////// // // Colour Type // It's quite useful // 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)); 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; } 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}; //////////////////////////////////////////////////////////////// // // Window Management // // #if 0 #ifndef GB_MAX_WINDOW_TITLE_LENGTH #define GB_MAX_WINDOW_TITLE_LENGTH 256 #endif typedef struct gbPlatformData { void *native_display_type; void *native_window_handle; void *context; void *back_buffer; void *back_buffer_depth_stencil; } gbPlatformData; typedef struct gbWindow { gbPlatformData platform_data; i32 x, y; i32 width, height; char title[GB_MAX_WINDOW_TITLE_LENGTH]; b32 fullscreen; b32 active; } gbWindow; #endif #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 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(stdout, 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, str); gb_fprintf(f, "\n"); res++; return res; } void gb_assert_handler(char const *condition, char const *file, i64 line, char const *msg, ...) { gb_fprintf(stderr, "%s:%lld: Assert Failure: ", file, cast(long long)line); if (condition) gb_fprintf(stderr, "`%s` ", condition); if (msg) { va_list va; va_start(va, msg); gb_fprintf(stderr, msg, va); va_end(va); } gb_fprintf(stderr, "\n"); } gb_inline void * gb_align_forward(void *ptr, isize align) { uintptr p; isize modulo; GB_ASSERT(gb_is_power_of_two(align)); p = cast(uintptr)ptr; modulo = p % align; if (modulo) p += (align - 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 gb_zero_size(void *ptr, isize size) { gb_memset(ptr, 0, size); } gb_inline void *gb_memcopy(void *dest, void const *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_cstring(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; } //////////////////////////////////////////////////////////////// // // Concurrency // #if defined(_MSC_VER) gb_inline i32 gb_load_atomic32(gbAtomic32 const volatile *a) { return a->value; } gb_inline void gb_store_atomic32(gbAtomic32 volatile *a, i32 value) { a->value = value; } gb_inline i32 gb_compare_exchange_strong_atomic32(gbAtomic32 volatile *a, i32 expected, i32 desired) { return _InterlockedCompareExchange(cast(long volatile *)a, desired, expected); } gb_inline i32 gb_exchanged_atomic32(gbAtomic32 volatile *a, i32 desired) { return _InterlockedExchange(cast(long volatile *)a, desired); } gb_inline i32 gb_fetch_add_atomic32(gbAtomic32 volatile *a, i32 operand) { return _InterlockedExchangeAdd(cast(long volatile *)a, operand); } gb_inline i32 gb_fetch_and_atomic32(gbAtomic32 volatile *a, i32 operand) { return _InterlockedAnd(cast(long volatile *)a, operand); } gb_inline i32 gb_fetch_or_atomic32(gbAtomic32 volatile *a, i32 operand) { return _InterlockedOr(cast(long volatile *)a, operand); } gb_inline i64 gb_load_atomic64(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_store_atomic64(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_compare_exchange_strong_atomic64(gbAtomic64 volatile *a, i64 expected, i64 desired) { return _InterlockedCompareExchange64(cast(i64 volatile *)a, desired, expected); } gb_inline i64 gb_exchanged_atomic64(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_fetch_add_atomic64(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 = _InterlockedExchange64(cast(i64 volatile *)a, expected + operand, expected); if (original == expected) return original; expected = original; } #endif } gb_inline i64 gb_fetch_and_atomic64(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_fetch_or_atomic64(gbAtomic64 volatile *a, i64 operand) { #if defined(GB_ARCH_64_BIT) return _InterlockedAnd64(cast(i64 volatile *)a, operand); #else i64 expected = object->nonatomic; for (;;) { i64 original = _InterlockedCompareExchange64(cast(i64 volatile *)a, expected | operand, expected); if (original == expected) return original; expected = original; } #endif } #else #error Implement atomics for this platform #endif gb_inline void gb_init_mutex(gbMutex *m) { m->win32_handle = CreateMutex(0, false, 0); } gb_inline void gb_destroy_mutex(gbMutex *m) { CloseHandle(m->win32_handle); } gb_inline void gb_lock_mutex(gbMutex *m) { WaitForSingleObject(m->win32_handle, INFINITE); } gb_inline b32 gb_try_lock_mutex(gbMutex *m) { return WaitForSingleObject(m->win32_handle, 0) == WAIT_OBJECT_0; } gb_inline void gb_unlock_mutex(gbMutex *m) { ReleaseMutex(m->win32_handle); } gb_inline void gb_init_semaphore(gbSemaphore *s) { s->win32_handle = CreateSemaphore(NULL, 0, I32_MAX, NULL); GB_ASSERT_MSG(s->win32_handle != NULL, "CreateSemaphore: GetLastError = %d", GetLastError()); } gb_inline void gb_destroy_semaphore(gbSemaphore *s) { BOOL err = CloseHandle(s->win32_handle); GB_ASSERT_MSG(err != 0, "CloseHandle: GetLastError = %d", GetLastError()); } gb_inline void gb_post_semaphore(gbSemaphore *s, i32 count) { BOOL err = ReleaseSemaphore(s->win32_handle, count, NULL); GB_ASSERT_MSG(err != 0, "ReleaseSemaphore: GetLastError = %d", GetLastError()); } gb_inline void gb_wait_semaphore(gbSemaphore *s) { DWORD result = WaitForSingleObject(s->win32_handle, INFINITE); GB_ASSERT_MSG(result == WAIT_OBJECT_0, "WaitForSingleObject: GetLastError = %d", GetLastError()); } void gb_init_thread(gbThread *t) { gb_zero_struct(t); t->win32_handle = INVALID_HANDLE_VALUE; gb_init_semaphore(&t->semaphore); } void gb_destory_thread(gbThread *t) { if (t->is_running) gb_join_thread(t); gb_destroy_semaphore(&t->semaphore); } gb_inline void gb__run_thread(gbThread *t) { gb_post_semaphore(&t->semaphore, 1); t->proc(t->data); } #if defined(GB_SYSTEM_WINDOWS) gb_inline DWORD WINAPI gb__thread_proc(void *arg) { gb__run_thread(cast(gbThread *)arg); return 0; } #else gb_inline void *gb__thread_proc(void *arg) { gb__run_thread(cast(gbThread *)arg); return NULL; } #endif gb_inline void gb_start_thread(gbThread *t, gbThreadProc *proc, void *data) { gb_start_thread_with_stack(t, proc, data, 0); } gb_inline void gb_start_thread_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; t->win32_handle = CreateThread(NULL, stack_size, gb__thread_proc, t, 0, NULL); GB_ASSERT_MSG(t->win32_handle != NULL, "CreateThread: GetLastError = %d", GetLastError()); t->is_running = true; gb_wait_semaphore(&t->semaphore); } gb_inline void gb_join_thread(gbThread *t) { if (!t->is_running) return; WaitForSingleObject(t->win32_handle, INFINITE); CloseHandle(t->win32_handle); t->win32_handle = INVALID_HANDLE_VALUE; t->is_running = false; } gb_inline b32 gb_is_thread_running(gbThread const *t) { return t->is_running != 0; } gb_inline u32 gb_current_thread_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; } 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) { switch (type) { case GB_ALLOCATION_ALLOC: { void *ptr; isize actual_size = size + alignment; ptr = gb_align_forward(gb_malloc(actual_size), alignment); return ptr; } break; case GB_ALLOCATION_FREE: { gb_mfree(old_memory); } break; case GB_ALLOCATION_FREE_ALL: break; case GB_ALLOCATION_RESIZE: { // TODO(bill): Check if ptr is on top of stack and just extend gbAllocator a = gb_heap_allocator(); if (!old_memory) return gb_alloc_align(a, size, alignment); if (size < old_size) size = old_size; if (old_size == size) { return old_memory; } else { void *new_memory = gb_alloc_align(a, size, alignment); if (!new_memory) return NULL; gb_memmove(new_memory, old_memory, gb_min(size, old_size)); gb_free(a, old_memory); return new_memory; } } break; } return NULL; // NOTE(bill): Default return value } gb_inline void gb_init_arena_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_init_arena_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_init_subarena(gbArena *arena, gbArena *parent_arena, isize size) { gb_init_arena_from_allocator(arena, gb_arena_allocator(parent_arena), size); } gb_inline void gb_free_arena(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_check_arena(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; isize actual_size = size + alignment; // NOTE(bill): Out of memory if (arena->total_allocated + actual_size > cast(isize)arena->total_size) return NULL; ptr = gb_align_forward(gb_pointer_add(arena->physical_start, arena->total_allocated), alignment); arena->total_allocated += actual_size; return ptr; } break; case GB_ALLOCATION_FREE: // NOTE(bill): Free all at once // NOTE(bill): Use Temp_Arena_Memory if you want to free a block // TODO(bill): Free it if it's on top of the stack 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); if (!old_memory) return gb_alloc_align(a, size, alignment); if (size < old_size) size = old_size; if (old_size == size) { return old_memory; } else { void *new_memory = gb_alloc_align(a, size, alignment); if (!new_memory) return NULL; gb_memmove(new_memory, old_memory, gb_min(size, old_size)); gb_free(a, old_memory); return new_memory; } } break; } return NULL; // NOTE(bill): Default return value } gb_inline gbTempArenaMemory gb_begin_temp_arena_memory(gbArena *arena) { gbTempArenaMemory tmp; tmp.arena = arena; tmp.original_count = arena->total_allocated; arena->temp_count++; return tmp; } gb_inline void gb_end_temp_arena_memory(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--; } gb_inline void gb_init_pool(gbPool *pool, gbAllocator backing, isize num_blocks, isize block_size) { gb_init_pool_align(pool, backing, num_blocks, block_size, GB_DEFAULT_MEMORY_ALIGNMENT); } void gb_init_pool_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_free_pool(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 break; } return NULL; } gb_inline void gb_qsort(void *base, isize count, isize size, gbCompareProc compare_proc) { qsort(base, count, size, compare_proc); } 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_is_char_space(char c) { if (c == ' ' || c == '\t' || c == '\n' || c == '\r' || c == '\f' || c == '\v') return true; return false; } gb_inline b32 gb_is_char_digit(char c) { if (c >= '0' && c <= '9') return true; return false; } gb_inline b32 gb_is_char_hex_digit(char c) { if (gb_is_char_digit(c) || (c >= 'a' && c <= 'f') || (c >= 'A' && c <= 'F')) return true; return false; } gb_inline b32 gb_is_char_alpha(char c) { if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) return true; return false; } gb_inline b32 gb_is_char_alphanumeric(char c) { return gb_is_char_alpha(c) || gb_is_char_digit(c); } 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_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_first_occurence_of_char(char const *s, char c) { char ch = c; for (; *s != ch; s++) { if (*s == '\0') return 0; } return s; } gb_inline char const * gb_last_occurence_of_char(char const *s, char c) { char const *result = NULL; do { if (*s == c) result = s; } while (*s++); return result; } gb_inline void gb_cstr_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_make_string(gbAllocator a, char const *str) { isize len = str ? gb_strlen(str) : 0; return gb_make_string_length(a, str, len); } gbString gb_make_string_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_free_string(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_make_string_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_clear_string(gbString str) { gb__set_string_length(str, 0); str[0] = '\0'; } gb_inline gbString gb_append_string(gbString str, gbString const other) { return gb_append_string_length(str, other, gb_string_length(other)); } gbString gb_append_string_length(gbString str, void const *other, isize other_len) { isize curr_len = gb_string_length(str); str = gb_make_space_for_string(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_append_cstring(gbString str, char const *other) { return gb_append_string_length(str, other, cast(isize)strlen(other)); } gbString gb_set_string(gbString str, char const *cstr) { isize len = gb_strlen(cstr); if (gb_string_capacity(str) < len) { str = gb_make_space_for_string(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_make_space_for_string(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 = gb_string_length(str) + add_len; void *ptr = GB_STRING_HEADER(str); isize old_size = gb_size_of(gbStringHeader) + gb_string_length(str) + 1; isize new_size = gb_size_of(gbStringHeader) + new_len + 1; void *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_are_strings_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_trim_string(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_first_occurence_of_char(cut_set, *start_pos)) start_pos++; while (end_pos > start_pos && gb_first_occurence_of_char(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_trim_space_string(gbString str) { return gb_trim_string(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_utfbyte[GB_UTF_SIZE+1] = {0x80, 0, 0xc0, 0xe0, 0xf0}; gb_global u8 const gb_utfmask[GB_UTF_SIZE+1] = {0xc0, 0x80, 0xe0, 0xf0, 0xf8}; gb_global char32 const gb_utfmin[GB_UTF_SIZE+1] = {0, 0, 0x80, 0x800, 0x10000}; gb_global char32 const gb_utfmax[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_utfmin[i], gb_utfmax[i]) || gb_is_between(*c, 0xd800, 0xdfff)) { *c = GB_UTF_INVALID; } i = 1; while (*c > gb_utfmax[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_utfmask); (*i)++) { if ((cast(u8)c & gb_utfmask[*i]) == gb_utfbyte[*i]) return cast(u8)(c & ~gb_utfmask[*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 cd; GB_ASSERT_NOT_NULL(s); GB_ASSERT_NOT_NULL(c); if (!s || !c) return 0; if (!str_len) return 0; *c = GB_UTF_INVALID; cd = 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++) { cd = (cd << 6) | gb__utf_decode_byte(s[i], &type); if (type != 0) return j; } if (j < len) return 0; *c = cd; gb__utf_validate(c, len); return len; } gb_no_inline void gb__set_array_capacity(void *array_, isize capacity, isize element_size) { // NOTE(bill): I know this is unsafe so don't call this function directly gbVoidArray *a = cast(gbVoidArray *)array_; void *data = NULL; GB_ASSERT(element_size > 0); if (capacity == a->capacity) return; if (capacity < a->count) { if (a->capacity < capacity) { isize new_capacity = GB_ARRAY_GROW_FORMULA(a->capacity); if (new_capacity < capacity) new_capacity = capacity; gb__set_array_capacity(a, new_capacity, element_size); } a->count = capacity; } if (capacity > 0) { data = gb_alloc(a->allocator, element_size*capacity); gb_memcopy(data, a->data, element_size*a->count); } gb_free(a->allocator, a->data); a->data = data; a->capacity = capacity; } //////////////////////////////////////////////////////////////// // // File Handling // // b32 gb_create_file(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_cstring(gb_heap_allocator(), path); file->size = gb_file_size(file); file->is_open = true; file->type = GB_FILE_TYPE_WRITE; file->last_write_time = gb_file_last_write_time(file->path); return true; } return false; } b32 gb_open_file(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_cstring(gb_heap_allocator(), path); file->size = gb_file_size(file); file->is_open = true; file->type = GB_FILE_TYPE_READ; file->last_write_time = gb_file_last_write_time(file->path); return true; } return false; } gb_inline b32 gb_close_file(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->type == GB_FILE_TYPE_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->type == GB_FILE_TYPE_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_has_file_changed(gbFile *file) { b32 result = false; gbFileTime last_write_time = gb_file_last_write_time(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 (GetFileAttributesEx(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_copy_file(char const *existing_filename, char const *new_filename, b32 fail_if_exists) { return CopyFile(existing_filename, new_filename, fail_if_exists); } gb_inline b32 gb_move_file(char const *existing_filename, char const *new_filename) { return MoveFile(existing_filename, new_filename); } #else #error #endif gbFileContents gb_read_entire_file_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_open_file(&file, 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_close_file(&file); } return result; } gb_inline b32 gb_is_path_absolute(char const *path) { b32 result = false; GB_ASSERT_NOT_NULL(path); #if defined(GB_SYSTEM_WINDOWS) result == (gb_strlen(path) > 2) && gb_is_char_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_is_path_relative(char const *path) { return !gb_is_path_absolute(path); } gb_inline b32 gb_is_path_root(char const *path) { b32 result = false; GB_ASSERT_NOT_NULL(path); #if defined(GB_SYSTEM_WINDOWS) result = gb_is_path_absolute(path) && gb_strlen(path) == 3; #else result = gb_is_path_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_last_occurence_of_char(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_last_occurence_of_char(path, '.'); return (ld == NULL) ? NULL : ld+1; } #if defined(GB_SYSTEM_WINDOWS) gb_inline void gb_exit(u32 code) { ExitProcess(code); } #else #error #endif //////////////////////////////////////////////////////////////// // // DLL Handling // // #if defined(GB_SYSTEM_WINDOWS) gbDllHandle gb_load_dll(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_unload_dll(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 #error #endif //////////////////////////////////////////////////////////////// // // Time // // #if defined(GB_SYSTEM_WINDOWS) gb_inline u64 gb_rdtsc(void) { return __rdtsc(); } 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_get_system_date(gbDate *date) { SYSTEMTIME st = {0}; GetSystemTime(&st); date->year = st.wYear; date->month = st.wMonth; date->day_of_week = st.wDayOfWeek; date->day = st.wDay; date->hour = st.wHour; date->minute = st.wMinute; date->second = st.wSecond; date->milliseconds = st.wMilliseconds; } gb_inline void gb_get_local_date(gbDate *date) { SYSTEMTIME st = {0}; GetLocalTime(&st); date->year = st.wYear; date->month = st.wMonth; date->day_of_week = st.wDayOfWeek; date->day = st.wDay; date->hour = st.wHour; date->minute = st.wMinute; date->second = st.wSecond; date->milliseconds = st.wMilliseconds; } #else #error #endif #if defined(__cplusplus) } #endif #endif /* GB_IMPLEMENTATION */