1/*-
2 * Copyright (c) 2006 M. Warner Losh.  All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
23 *
24 */
25
26#include <sys/cdefs.h>
27__FBSDID("$FreeBSD$");
28
29/******************************************************************************
30 *
31 * Filename: p_string.c
32 *
33 * Instantiation of basic string operations to prevent inclusion of full
34 * string library.  These are simple implementations not necessarily optimized
35 * for speed, but rather to show intent.
36 *
37 * Revision information:
38 *
39 * 20AUG2004	kb_admin	initial creation
40 * 12JAN2005	kb_admin	minor updates
41 *
42 * BEGIN_KBDD_BLOCK
43 * No warranty, expressed or implied, is included with this software.  It is
44 * provided "AS IS" and no warranty of any kind including statutory or aspects
45 * relating to merchantability or fitness for any purpose is provided.  All
46 * intellectual property rights of others is maintained with the respective
47 * owners.  This software is not copyrighted and is intended for reference
48 * only.
49 * END_BLOCK
50 *****************************************************************************/
51
52#include "lib.h"
53
54/*
55 * .KB_C_FN_DEFINITION_START
56 * int p_IsWhiteSpace(char)
57 *  This global function returns true if the character is not considered
58 * a non-space character.
59 * .KB_C_FN_DEFINITION_END
60 */
61int
62p_IsWhiteSpace(char cValue)
63{
64	return ((cValue == ' ') ||
65		(cValue == '\t') ||
66		(cValue == 0) ||
67		(cValue == '\r') ||
68		(cValue == '\n'));
69}
70
71
72/*
73 * .KB_C_FN_DEFINITION_START
74 * unsigned p_HexCharValue(char)
75 *  This global function returns the decimal value of the validated hex char.
76 * .KB_C_FN_DEFINITION_END
77 */
78unsigned
79p_HexCharValue(char cValue)
80{
81	if (cValue < ('9' + 1))
82		return (cValue - '0');
83	if (cValue < ('F' + 1))
84		return (cValue - 'A' + 10);
85	return (cValue - 'a' + 10);
86}
87
88/*
89 * .KB_C_FN_DEFINITION_START
90 * unsigned p_ASCIIToHex(char *)
91 *  This global function set the unsigned value equal to the converted
92 * hex number passed as a string.  No error checking is performed; the
93 * string must be valid hex value, point at the start of string, and be
94 * NULL-terminated.
95 * .KB_C_FN_DEFINITION_END
96 */
97unsigned
98p_ASCIIToHex(const char *buf)
99{
100	unsigned	lValue = 0;
101
102	if ((*buf == '0') && ((buf[1] == 'x') || (buf[1] == 'X')))
103		buf += 2;
104
105	while (*buf) {
106		lValue <<= 4;
107		lValue += p_HexCharValue(*buf++);
108	}
109	return (lValue);
110}
111
112
113/*
114 * .KB_C_FN_DEFINITION_START
115 * unsigned p_ASCIIToDec(char *)
116 *  This global function set the unsigned value equal to the converted
117 * decimal number passed as a string.  No error checking is performed; the
118 * string must be valid decimal value, point at the start of string, and be
119 * NULL-terminated.
120 * .KB_C_FN_DEFINITION_END
121 */
122unsigned
123p_ASCIIToDec(const char *buf)
124{
125	unsigned v = 0;
126
127	while (*buf) {
128		v *= 10;
129		v += (*buf++) - '0';
130	}
131	return (v);
132}
133