Subversion Repositories SvarDOS

/*

 * trims any space, tab, cr or lf

 * Copyright (C) 2012-2021 Mateusz Viste

 */

#include "trim.h"

void trim(char *str) {

  int x, y, firstchar = -1, lastchar = -1;

  /* find out first and last non-whitespace char */

  for (x = 0; str[x] != 0; x++) {

    switch (str[x]) {

      case ' ':

      case '\t':

      case '\n':

      case '\r':

        break;

      default:

        if (firstchar < 0) firstchar = x;

        lastchar = x;

        break;

    }

  }

  /* right trim */

  str[lastchar + 1] = 0;

  /* left trim (shift to the left ) */

  if (firstchar > 0) {

    y = 0;

    for (x = firstchar; str[x] != 0; x++) str[y++] = str[x];

    str[y] = 0;

  }

}