73 lines
1.4 KiB
C
Executable File
73 lines
1.4 KiB
C
Executable File
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#include "types.h"
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#include "string.h"
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int memcmp(const void *vl, const void *vr, size_t n)
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{
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const unsigned char *l=vl, *r=vr;
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for (; n && *l == *r; n--, l++, r++);
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return n ? *l-*r : 0;
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}
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void *memccpy(void *dst, const void *src, int c, size_t count)
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{
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char *a = dst;
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const char *b = src;
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while (count--)
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{
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*a++ = *b;
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if (*b == c)
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{
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return (void *)a;
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}
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b++;
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}
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return 0;
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}
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void memcpy(void *dst, void *src, size_t len)
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{
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register char *b_dst = dst;
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register char *b_src = src;
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for (; len; len--)
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{
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(*b_dst++) = (*b_src++);
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}
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}
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void *memset(void *dst, char s, size_t count)
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{
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register char *a = dst;
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count++; /* this actually creates smaller code than using count-- */
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while (--count)
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*a++ = s;
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return dst;
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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 (*s1 - *s2);
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}
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char *strcpy(register char *s1, register const char *s2)
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{
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register char *res = s1;
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while ((*s1++ = *s2++))
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;
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return (res);
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}
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size_t strlen(const char *s)
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{
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const char *t = s;
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unsigned long word;
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if (!s)
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return 0;
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for (; *s++;)
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;
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return (size_t)(s - t) - 1;
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}
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char *strncpy(char *dest, const char *src, uint32_t n)
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{
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memccpy(dest, src, 0, n);
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return dest;
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}
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