69 lines
1.4 KiB
C
69 lines
1.4 KiB
C
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#include "stdlib.h"
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#ifdef KINC_WASM
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__attribute__((import_module("imports"), import_name("js_fprintf"))) void js_fprintf(const char *format);
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#define HEAP_SIZE 1024 * 1024 * 8
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static unsigned char heap[HEAP_SIZE];
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static size_t heap_top = 4;
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#endif
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#ifdef KINC_WASM
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__attribute__((export_name("malloc")))
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#endif
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void *malloc(size_t size) {
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#ifdef KINC_WASM
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// Align to 4 bytes to make js typed arrays work
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if (size % 4 != 0) {
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size += 4 - size % 4;
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}
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size_t old_top = heap_top;
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heap_top += size;
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if (heap_top >= HEAP_SIZE) {
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js_fprintf("malloc: out of memory");
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}
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return &heap[old_top];
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#endif
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return NULL;
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}
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void *alloca(size_t size) {
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return NULL;
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}
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void *realloc(void *mem, size_t size) {
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return NULL;
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}
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void free(void *mem) {
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}
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void *memset(void *ptr, int value, size_t num) {
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unsigned char *data = (unsigned char *)ptr;
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for (size_t i = 0; i < num; ++i) {
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data[i] = (unsigned char)value;
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}
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return ptr;
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}
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void *memcpy(void *destination, const void *source, size_t num) {
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unsigned char *s = (unsigned char *)source;
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unsigned char *d = (unsigned char *)destination;
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for (size_t i = 0; i < num; ++i) {
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d[i] = s[i];
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}
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return destination;
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}
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int memcmp(const void *ptr1, const void *ptr2, size_t num) {
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unsigned char *p1 = (unsigned char *)ptr1;
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unsigned char *p2 = (unsigned char *)ptr2;
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for (size_t i = 0; i < num; ++i) {
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if (p1[i] != p2[i]) {
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return (int)p1[i] - (int)p2[i];
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}
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}
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return 0;
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}
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