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 source tree.
   8 */
   9#include "libbb.h"
  10
  11char* FAST_FUNC skip_whitespace(const char *s)
  12{
  13        /* In POSIX/C locale (the only locale we care about: do we REALLY want
  14         * to allow Unicode whitespace in, say, .conf files? nuts!)
  15         * isspace is only these chars: "\t\n\v\f\r" and space.
  16         * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
  17         * Use that.
  18         */
  19        while (*s == ' ' || (unsigned char)(*s - 9) <= (13 - 9))
  20                s++;
  21
  22        return (char *) s;
  23}
  24
  25char* FAST_FUNC skip_non_whitespace(const char *s)
  26{
  27        while (*s != '\0' && *s != ' ' && (unsigned char)(*s - 9) > (13 - 9))
  28                s++;
  29
  30        return (char *) s;
  31}
  32
  33char* FAST_FUNC skip_dev_pfx(const char *tty_name)
  34{
  35        char *unprefixed = is_prefixed_with(tty_name, "/dev/");
  36        return unprefixed ? unprefixed : (char*)tty_name;
  37}
  38