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  * This code is Copyright (c) 2002, by the authors of nmh.  See the
  10  * COPYRIGHT file in the root directory of the nmh distribution for
  11  * complete copyright information.
  12  */
  13
  14 #include <h/mh.h>
  15
  16
  17 char *
  18 trimcpy (char *cp)
  19 {
  20     char *sp;
  21
  22     /* skip over leading whitespace */
  23     while (isspace(*cp))
  24         cp++;
  25
  26     /* start at the end and zap trailing whitespace */
  27     for (sp = cp + strlen(cp) - 1; sp >= cp; sp--) {
  28         if (isspace(*sp))
  29             *sp = '\0';
  30         else
  31             break;
  32     }
  33
  34     /* replace remaining whitespace with spaces */
  35     for (sp = cp; *sp; sp++) {
  36         if (isspace(*sp))
  37             *sp = ' ';
  38     }
  39
  40     /* now return a copy */
  41     return getcpy(cp);
  42 }