87 lines
2 KiB
C
87 lines
2 KiB
C
#include "cutil.h"
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#include "endian.h"
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#ifdef CUTIL_NOSTDLIB
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# include "heap.h"
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mheap_t cu_heap;
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void* _cu_malloc(size_t size)
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{
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mblock_t* block = heap_alloc(&cu_heap, size);
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return block ? (u8*)block + sizeof(mblock_t) : NULL;
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}
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void* _cu_realloc(void* mem, size_t size)
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{
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mblock_t* block = heap_realloc(&cu_heap,
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(mblock_t*)((u8*)mem - sizeof(mblock_t)), size);
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return block ? (u8*)block + sizeof(mblock_t) : NULL;
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}
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void _cu_free(void* mem)
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{
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return heap_free((mblock_t*)((u8*)mem - sizeof(mblock_t)));
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}
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void* (*cu_malloc)(size_t) = _cu_malloc;
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void* (*cu_realloc)(void*, size_t) = _cu_realloc;
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void (*cu_free)(void*) = _cu_free;
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void* (*cu_memset)(void*,int,size_t) = _cu_memset;
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void* (*cu_memcpy)(void*,const void*,size_t) = _cu_memcpy;
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void* (*cu_memmove)(void*,const void*,size_t) = _cu_memmove;
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void* (*cu_memcmp)(const void*,const void*, size_t) = _cu_memcmp;
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void cutil_init(void* heap, size_t size)
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{
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heap_init(&cu_heap, heap, size);
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cu_endian_init();
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}
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#else
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# include <stdlib.h>
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# include <string.h>
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void* (*cu_malloc)(size_t) = malloc;
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void* (*cu_realloc)(void*, size_t) = realloc;
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void (*cu_free)(void*) = free;
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void* (*cu_memset)(void*,int,size_t) = memset;
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void* (*cu_memcpy)(void*,const void*,size_t) = memcpy;
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void* (*cu_memmove)(void*,const void*,size_t) = memmove;
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void* (*cu_memcmp)(const void*,const void*, size_t) = memcmp;
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void cutil_init(void* heap, size_t size)
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{
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cu_endian_init();
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}
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#endif
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void cutil_exit()
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{
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}
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void __cu_memmove(void* dst, void* src, size_t size)
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{
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if (dst > src)
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{
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uint d = (uword)dst - (uword)src;
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src = (u8*)src + size;
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dst = (u8*)dst + size;
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while (size)
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{
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src = (u8*)src - d;
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dst = (u8*)dst - d;
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cu_memcpy(dst, src, d);
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size -= d;
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}
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}
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else if (dst < src)
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{
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uint d = (uword)src - (uword)dst;
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while (size)
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{
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cu_memcpy(dst, src, d);
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src = (u8*)src + d;
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dst = (u8*)dst + d;
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size -= d;
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}
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}
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}
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