pc-bios/vof/libc.c

   1 #include "vof.h"
   2
   3 int strlen(const char *s)
   4 {
   5     int len = 0;
   6
   7     while (*s != 0) {
   8         len += 1;
   9         s += 1;
  10     }
  11
  12     return len;
  13 }
  14
  15 int strcmp(const char *s1, const char *s2)
  16 {
  17     while (*s1 != 0 && *s2 != 0) {
  18         if (*s1 != *s2) {
  19             break;
  20         }
  21         s1 += 1;
  22         s2 += 1;
  23     }
  24
  25     return *s1 - *s2;
  26 }
  27
  28 void *memcpy(void *dest, const void *src, size_t n)
  29 {
  30     char *cdest;
  31     const char *csrc = src;
  32
  33     cdest = dest;
  34     while (n-- > 0) {
  35         *cdest++ = *csrc++;
  36     }
  37
  38     return dest;
  39 }
  40
  41 int memcmp(const void *ptr1, const void *ptr2, size_t n)
  42 {
  43     const unsigned char *p1 = ptr1;
  44     const unsigned char *p2 = ptr2;
  45
  46     while (n-- > 0) {
  47         if (*p1 != *p2) {
  48             return *p1 - *p2;
  49         }
  50         p1 += 1;
  51         p2 += 1;
  52     }
  53
  54     return 0;
  55 }
  56
  57 void *memset(void *dest, int c, size_t size)
  58 {
  59     unsigned char *d = (unsigned char *)dest;
  60
  61     while (size-- > 0) {
  62         *d++ = (unsigned char)c;
  63     }
  64
  65     return dest;
  66 }