git.zerfleddert.de Git - proxmark3-svn/blob - armsrc/util.c

   1 //-----------------------------------------------------------------------------
   2 // Utility functions used in many places, not specific to any piece of code.
   3 // Jonathan Westhues, Sept 2005
   4 //-----------------------------------------------------------------------------
   5 #include <proxmark3.h>
   6 #include "apps.h"
   7
   8 void *memcpy(void *dest, const void *src, int len)
   9 {
  10         BYTE *d = dest;
  11         const BYTE *s = src;
  12         while((len--) > 0) {
  13                 *d = *s;
  14                 d++;
  15                 s++;
  16         }
  17         return dest;
  18 }
  19
  20 void *memset(void *dest, int c, int len)
  21 {
  22         BYTE *d = dest;
  23         while((len--) > 0) {
  24                 *d = c;
  25                 d++;
  26         }
  27         return dest;
  28 }
  29
  30 int memcmp(const void *av, const void *bv, int len)
  31 {
  32         const BYTE *a = av;
  33         const BYTE *b = bv;
  34
  35         while((len--) > 0) {
  36                 if(*a != *b) {
  37                         return *a - *b;
  38                 }
  39                 a++;
  40                 b++;
  41         }
  42         return 0;
  43 }
  44
  45 int strlen(char *str)
  46 {
  47         int l = 0;
  48         while(*str) {
  49                 l++;
  50                 str++;
  51         }
  52         return l;
  53 }