tools/perf/util/string.c

   1 #include <string.h>
   2 #include "string.h"
   3
   4 static int hex(char ch)
   5 {
   6         if ((ch >= '0') && (ch <= '9'))
   7                 return ch - '0';
   8         if ((ch >= 'a') && (ch <= 'f'))
   9                 return ch - 'a' + 10;
  10         if ((ch >= 'A') && (ch <= 'F'))
  11                 return ch - 'A' + 10;
  12         return -1;
  13 }
  14
  15 /*
  16  * While we find nice hex chars, build a long_val.
  17  * Return number of chars processed.
  18  */
  19 int hex2u64(const char *ptr, u64 *long_val)
  20 {
  21         const char *p = ptr;
  22         *long_val = 0;
  23
  24         while (*p) {
  25                 const int hex_val = hex(*p);
  26
  27                 if (hex_val < 0)
  28                         break;
  29
  30                 *long_val = (*long_val << 4) | hex_val;
  31                 p++;
  32         }
  33
  34         return p - ptr;
  35 }
  36
  37 char *strxfrchar(char *s, char from, char to)
  38 {
  39         char *p = s;
  40
  41         while ((p = strchr(p, from)) != NULL)
  42                 *p++ = to;
  43
  44         return s;
  45 }