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 */ 61 int 62 p_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 */ 78 unsigned 79 p_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 */ 97 unsigned 98 p_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 */ 122 unsigned 123 p_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