2 * This file is part of the libpayload project.
4 * Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <libpayload.h>
34 return ((c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z'));
39 return (c >= 0 && c <= 127);
44 return (c == ' ' || c == '\t');
49 return (c <= 31 || c == 127);
54 return (c >= '0' && c <= '9');
59 return isalpha(c) || isdigit(c);
64 return (c >= 33 && c <= 126);
69 return (c >= 'a' && c <= 'z');
74 return (c >= 32 && c <= 126);
79 return isprint(c) && !isspace(c) && !isalnum(c);
84 return (c == ' ' || (c >= '\t' && c <= '\r'));
89 return (c >= 'A' && c <= 'Z');
94 return isdigit(c) || (tolower(c) >= 'a' && tolower(c) <= 'f');
99 return (c >= 'A' && c <= 'Z') ? (c + 32) : c;
104 return (c >= 'a' && c <= 'z') ? (c - 32) : c;