strutils.c

   1 #include <ctype.h>
   2 #include <string.h>
   3
   4
   5 /* returns the start of the next token */
   6 char *readtoken(char *to, char *from, char *delims)
   7 {
   8         for (; *from != '\0' && !strchr(delims, *from);)
   9                 *to++ = *from++;
  10         *to = '\0';
  11         for (; *from != '\0' && strchr(delims, *from);)
  12                 from++;
  13         return from;
  14 }
  15
  16 /* returns the start of the next word */
  17 char *readword(char *to, char *from)
  18 {
  19         for (; *from != '\0' && isalnum(*from);)
  20                 *to++ = *from++;
  21         *to = '\0';
  22         for (; *from != '\0' && !isalnum(*from);)
  23                 from++;
  24         return from;
  25 }
  26
  27 char *nthtoken(char *to, char *from, char* delims, int n)
  28 {
  29         int i = 0;
  30         for (i = 0; i < n; i++)
  31                 from = readtoken(to, from, delims);
  32         return from;
  33 }
  34
  35 int startswith(char *heystack, char *needle)
  36 {
  37         while (*needle != '\0' && *needle == *heystack++)
  38                 needle++;
  39         return !*needle;
  40 }
  41
  42 int endswith(char *heystack, char *needle)
  43 {
  44         char *p = heystack + strlen(heystack);
  45         char *q = needle + strlen(needle);
  46         while (q != needle && p != heystack && *--p == *--q)
  47                 ;
  48         return *p == *q && q == needle;
  49 }