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  * This code is Copyright (c) 2002, by the authors of nmh.  See the
   8  * COPYRIGHT file in the root directory of the nmh distribution for
   9  * complete copyright information.
  10  */
  11
  12 #include <h/mh.h>
  13
  14
  15 char *
  16 trimcpy (unsigned char *cp)
  17 {
  18     unsigned char *sp;
  19
  20     /* skip over leading whitespace */
  21     while (isspace(*cp))
  22         cp++;
  23
  24     /* start at the end and zap trailing whitespace */
  25     for (sp = cp + strlen(cp) - 1; sp >= cp; sp--) {
  26         if (isspace(*sp))
  27             *sp = '\0';
  28         else
  29             break;
  30     }
  31
  32     /* replace remaining whitespace with spaces */
  33     for (sp = cp; *sp; sp++) {
  34         if (isspace(*sp))
  35             *sp = ' ';
  36     }
  37
  38     /* now return a copy */
  39     return getcpy(cp);
  40 }