Update gb.h - v0.02
Minor fixes to work with older versions of MSVC
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gingerBill
parent
de04cbcee7
commit
b6021f11c2
95
gb.h
95
gb.h
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@ -1,4 +1,4 @@
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// gb.h - v0.01 - public domain C helper library - no warranty implied; use at your own risk
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// gb.h - v0.02 - public domain C helper library - no warranty implied; use at your own risk
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// (Experimental) A C helper library geared towards game development
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/*
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@ -33,6 +33,7 @@ TODO
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/*
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Version History:
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0.02 - Minor fixes
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0.01 - Initial Version
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*/
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@ -72,13 +73,14 @@ extern "C" {
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#ifndef GB_ASSERT
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#include <assert.h>
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#define GB_ASSERT(cond) assert(cond)
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#define GB_ASSERT_MSG(cond, msg) assert((cond) && (msg))
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#endif
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#define GB_STATIC_ASSERT(cond, msg) typedef char gb__static_assertion_##msg[(!!(cond))*2-1]
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#define GB_STATIC_ASSERT3(cond, msg) typedef char gb__static_assertion_##msg[(!!(cond))*2-1]
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// NOTE(bill): Token pasting madness
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#define GB_COMPILE_TIME_ASSERT3(cond, line) GB_STATIC_ASSERT(cond, static_assertion_at_line_##line)
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#define GB_COMPILE_TIME_ASSERT2(cond, line) GB_COMPILE_TIME_ASSERT3(cond, line)
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#define GB_COMPILE_TIME_ASSERT(cond) GB_COMPILE_TIME_ASSERT2(cond, __LINE__)
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#define GB_STATIC_ASSERT2(cond, line) GB_STATIC_ASSERT3(cond, static_assertion_at_line_##line)
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#define GB_STATIC_ASSERT1(cond, line) GB_STATIC_ASSERT2(cond, line)
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#define GB_STATIC_ASSERT(cond) GB_STATIC_ASSERT1(cond, __LINE__)
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#if !defined(GB_NO_STDIO) && defined(_MSC_VER)
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@ -136,26 +138,37 @@ extern "C" {
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typedef int64_t s64;
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#endif
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GB_COMPILE_TIME_ASSERT(sizeof(s8) == 1);
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GB_COMPILE_TIME_ASSERT(sizeof(s16) == 2);
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GB_COMPILE_TIME_ASSERT(sizeof(s32) == 4);
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GB_COMPILE_TIME_ASSERT(sizeof(s64) == 8);
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GB_STATIC_ASSERT(sizeof(s8) == 1);
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GB_STATIC_ASSERT(sizeof(s16) == 2);
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GB_STATIC_ASSERT(sizeof(s32) == 4);
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GB_STATIC_ASSERT(sizeof(s64) == 8);
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typedef size_t usize;
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typedef uintptr_t uintptr;
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typedef intptr_t intptr;
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typedef float f32;
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typedef double f64;
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#include <stdbool.h> // NOTE(bill): To get false/true
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#if defined(_MSC_VER) && _MSC_VER < 1900
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#ifndef false
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#define false 0
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#endif
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#ifndef true
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#define true 1
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#endif
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#else
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#include <stdbool.h> // NOTE(bill): To get false/true
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#endif
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// Boolean Types
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typedef s8 b8;
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typedef s32 b32;
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#ifndef U8_MIN
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#define U8_MIN 0u
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#define U8_MAX 0xffu
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#define S8_MIN (-0x7f - 1)
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@ -175,7 +188,7 @@ typedef s32 b32;
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#define U64_MAX 0xffffffffffffffffull
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#define S64_MIN (-0x7fffffffffffffffll - 1)
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#define S64_MAX 0x7fffffffffffffffll
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#endif
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@ -185,7 +198,7 @@ typedef s32 b32;
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#endif
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// NOTE(bill): Allows for easy grep of casts
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// NOTE(bill): Still not as type safe as C++ static_cast, reinterpret_cast, const_cast
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// NOTE(bill): Still not as type safe as C++ static_cast, reinterpret_cast, and const_cast, but I don't need them
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#ifndef cast
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#define cast(x) (x)
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#endif
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@ -271,7 +284,10 @@ typedef enum gb_Allocation_Type
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GB_ALLOCATION_TYPE_RESIZE,
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} gb_Allocation_Type;
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#ifndef GB_ALLOCATOR_PROCEDURE
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#define GB_ALLOCATOR_PROCEDURE(name) void *name(void *allocator_data, gb_Allocation_Type type, usize size, usize alignment, void *old_memory, usize old_size, u32 options)
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#endif
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typedef GB_ALLOCATOR_PROCEDURE(gb_Allocator_Procedure);
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typedef struct gb_Allocator
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@ -471,27 +487,30 @@ gb_init_pool(gb_Pool *pool, gb_Allocator backing, usize num_blocks, usize block_
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void
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gb_init_pool_align(gb_Pool *pool, gb_Allocator backing, usize num_blocks, usize block_size, usize block_align)
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{
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memset(pool, 0, sizeof(gb_Pool));
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usize actual_block_size, pool_size, block_index;
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u8 *data, *curr;
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pool->backing = backing;
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pool->block_size = block_size;
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pool->block_align = block_align;
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usize actual_block_size = block_size + block_align;
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usize pool_size = num_blocks * actual_block_size;
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actual_block_size = block_size + block_align;
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pool_size = num_blocks * actual_block_size;
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u8 *data = cast(u8 *)gb_alloc_align(backing, pool_size, block_align);
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data = cast(u8 *)gb_alloc_align(backing, pool_size, block_align);
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// Init intrusive freelist
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u8 *curr = data;
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for (usize block_index = 0; block_index < num_blocks-1; block_index++) {
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curr = data;
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for (block_index = 0; block_index < num_blocks-1; block_index++) {
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uintptr *next = cast(uintptr *)curr;
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*next = cast(uintptr)curr + actual_block_size;
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curr += actual_block_size;
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}
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uintptr *end = cast(uintptr*)curr;
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*end = cast(uintptr)NULL;
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{
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uintptr *end = cast(uintptr*)curr;
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*end = cast(uintptr)NULL;
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}
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pool->physical_start = data;
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pool->free_list = data;
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@ -646,22 +665,23 @@ gb_string_make_length(gb_Allocator a, void const *init_str, gb_String_Size num_b
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gb_String_Size header_size = sizeof(gb_String_Header);
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void *ptr = gb_alloc(a, header_size + num_bytes + 1);
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gb_String str;
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gb_String_Header *header;
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if (ptr == NULL) {
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return NULL;
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} else {
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gb_String str = cast(char *)ptr + header_size;
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gb_String_Header *header = GB_STRING_HEADER(str);
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// Zero all data first
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if (!init_str) gb_zero_size(ptr, header_size + num_bytes + 1);
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header->allocator = a;
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header->length = num_bytes;
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header->capacity = num_bytes;
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if (!init_str) gb_zero_size(ptr, header_size + num_bytes + 1);
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if (ptr == NULL) return NULL;
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if (num_bytes && init_str)
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memcpy(str, init_str, num_bytes);
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str[num_bytes] = '\0'; // Just in case
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str = cast(char *)ptr + header_size;
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header = GB_STRING_HEADER(str);
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header->allocator = a;
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header->length = num_bytes;
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header->capacity = num_bytes;
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if (num_bytes && init_str)
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memcpy(str, init_str, num_bytes);
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str[num_bytes] = '\0';
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return str;
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return str;
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}
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}
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gb_inline void
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@ -746,6 +766,7 @@ gb__string_realloc(gb_Allocator a, void *ptr, gb_String_Size old_size, gb_String
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if (old_size == new_size) {
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return ptr;
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} else {
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// TODO(bill): Use gb_resize here??
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void *new_ptr = gb_alloc(a, new_size);
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if (!new_ptr)
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return NULL;
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@ -785,8 +806,8 @@ gb_string_make_space_for(gb_String str, gb_String_Size add_len)
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gb_inline gb_String_Size
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gb_string_allocation_size(gb_String const str)
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{
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gb_String_Size cap = gb_string_capacity(str);
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return sizeof(gb_String_Header) + cap;
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gb_String_Size result = gb_string_capacity(str) + cast(gb_String_Size)sizeof(gb_String_Header);
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return result;
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}
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