69 lines
1.3 KiB
C
69 lines
1.3 KiB
C
#include <string.h>
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#include <stdint.h>
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#include <stddef.h>
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#include <mem.h>
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// Standard function required by gcc
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// Just the naíve implementations for now
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void *memcpy(void *dest, const void *src, size_t n)
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{
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char *dp = dest;
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const char *sp = src;
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while(n--) *dp++ = *sp++;
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return dest;
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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 void * 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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int strncmp(const char *s1, const char *s2, size_t n)
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{
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while(n && *s1 && (*s1==*s2))
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s1++, s2++, n--;
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return *(const unsigned char*)s1-*(const unsigned char*)s2;
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}
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int strcmp(const char *s1, const char *s2)
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{
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while(*s1 && (*s1==*s2))
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s1++, s2++;
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return *(const unsigned char*)s1-*(const unsigned char*)s2;
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}
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char *strdup(const char *s)
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{
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char *ret = kmalloc(strlen(s)+1);
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memcpy(ret, s, strlen(s)+1);
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return ret;
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}
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