LXR busybox/libbb/skip

   1/* vi: set sw=4 ts=4: */
   2/*
   3 * skip_whitespace implementation for busybox
   4 *
   5 * Copyright (C) 2003  Manuel Novoa III  <mjn3@codepoet.org>
   6 *
   7 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
   8 */
   9
  10#include "libbb.h"
  11
  12char* FAST_FUNC skip_whitespace(const char *s)
  13{
  14        /* In POSIX/C locale (the only locale we care about: do we REALLY want
  15         * to allow Unicode whitespace in, say, .conf files? nuts!)
  16         * isspace is only these chars: "\t\n\v\f\r" and space.
  17         * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
  18         * Use that.
  19         */
  20        while (*s == ' ' || (unsigned char)(*s - 9) <= (13 - 9))
  21                s++;
  22
  23        return (char *) s;
  24}
  25
  26char* FAST_FUNC skip_non_whitespace(const char *s)
  27{
  28        while (*s != '\0' && *s != ' ' && (unsigned char)(*s - 9) > (13 - 9))
  29                s++;
  30
  31        return (char *) s;
  32}
  33
  34char* FAST_FUNC skip_dev_pfx(const char *tty_name)
  35{
  36        if (strncmp(tty_name, "/dev/", 5) == 0)
  37                tty_name += 5;
  38        return (char*)tty_name;
  39}
  40