diplodocus.org Git - nmh/blob - sbr/trimcpy.c

   1
   2 /*
   3  * trimcpy.c -- strip leading and trailing whitespace,
   4  *           -- replace internal whitespace with spaces,
   5  *           -- then return a copy.
   6  *
   7  * $Id$
   8  */
   9
  10 #include <h/mh.h>
  11
  12
  13 char *
  14 trimcpy (char *cp)
  15 {
  16     char *sp;
  17
  18     /* skip over leading whitespace */
  19     while (isspace(*cp))
  20         cp++;
  21
  22     /* start at the end and zap trailing whitespace */
  23     for (sp = cp + strlen(cp) - 1; sp >= cp; sp--) {
  24         if (isspace(*sp))
  25             *sp = '\0';
  26         else
  27             break;
  28     }
  29
  30     /* replace remaining whitespace with spaces */
  31     for (sp = cp; *sp; sp++) {
  32         if (isspace(*sp))
  33             *sp = ' ';
  34     }
  35
  36     /* now return a copy */
  37     return getcpy(cp);
  38 }