44 lines
768 B
C
44 lines
768 B
C
#include <memory.h>
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#include <stdint.h>
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#include <stddef.h>
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void *memcpy(void *dst, const void *src, size_t n)
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{
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char *dp = dst;
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const char *sp = src;
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while(n--) *dp++ = *sp++;
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return dst;
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}
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void *memset(void *s, int c, size_t n)
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{
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unsigned char *p = s;
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while(n--) *p++ = (unsigned char)c;
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return s;
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}
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void *memmove(void *dest, const void *src, size_t n)
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{
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// Since our memcpy implementation copies one char* at a time, this is safe
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memcpy(dest, src, n);
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return dest;
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}
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int memcmp(const void *s1, const void *s2, size_t n)
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{
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const unsigned char *p1 = s1, *p2 = s2;
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for(; n--; p1++, p2++)
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{
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if(*p1 != *p2)
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return *p1 - *p2;
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}
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return 0;
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}
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size_t strlen(const char *s)
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{
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size_t len = 0;
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while(*s++) len++;
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return len;
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}
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