split.c

   1
   2
   3 /*
   4  * splitline is a destructive argument parser, much like a very primitive
   5  * form of a shell parser. it supports quotes for embedded spaces and
   6  * literal quotes with the backslash escape.
   7  */
   8
   9 char *splitnext(char **pos)
  10 {
  11         char *a, *d, *s;
  12
  13         d = s = *pos;
  14         while (*s == ' ' || *s == '\t') s++;
  15         a = s;
  16         while (*s && *s != ' ' && *s != '\t')
  17         {
  18                 if (*s == '"')
  19                 {
  20                         s++;
  21                         while (*s && *s != '"')
  22                         {
  23                                 if (*s == '\\')
  24                                         s++;
  25                                 if (*s)
  26                                         *(d++) = *(s++);
  27                         }
  28                         if (*s == '"') s++;
  29                 }
  30                 else
  31                 {
  32                         if (*s == '\\')
  33                                 s++;
  34                         *(d++) = *(s++);
  35                 }
  36         }
  37         while (*s == ' ' || *s == '\t') s++;
  38         *d = 0;
  39         *pos = s;
  40         return a;
  41 }
  42
  43 int splitline(char **argv, int max, char *line)
  44 {
  45         char *s;
  46         int i;
  47
  48         s = line;
  49         for (i = 0; *s && i < max + 1; i++)
  50                 argv[i] = splitnext(&s);
  51         argv[i] = 0;
  52         return i;
  53 }
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