annotate utils.c @ 40:291fefe664f2

Oops, fix previous.
author David A. Holland
date Sat, 30 Mar 2013 21:48:57 -0400
parents 337110e7240a
children ef8bedab8a4b
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1 /*-
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2 * Copyright (c) 2010 The NetBSD Foundation, Inc.
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3 * All rights reserved.
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4 *
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5 * This code is derived from software contributed to The NetBSD Foundation
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6 * by David A. Holland.
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7 *
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8 * Redistribution and use in source and binary forms, with or without
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9 * modification, are permitted provided that the following conditions
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10 * are met:
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11 * 1. Redistributions of source code must retain the above copyright
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12 * notice, this list of conditions and the following disclaimer.
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13 * 2. Redistributions in binary form must reproduce the above copyright
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14 * notice, this list of conditions and the following disclaimer in the
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15 * documentation and/or other materials provided with the distribution.
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16 *
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17 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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18 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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19 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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20 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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21 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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22 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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23 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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24 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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25 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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26 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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27 * POSSIBILITY OF SUCH DAMAGE.
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28 */
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29
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30 #include <stdlib.h>
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31 #include <string.h>
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32 #include <err.h>
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33
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34 #include "utils.h"
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35
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36 const char ws[] =
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37 " \t\f\v"
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38 ;
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39 const char alnum[] =
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40 "0123456789"
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41 "abcdefghijklmnopqrstuvwxyz"
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42 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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43 "_"
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44 ;
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45
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46 void *
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47 domalloc(size_t len)
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48 {
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49 void *ret;
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50
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51 ret = malloc(len);
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52 if (ret == NULL) {
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53 warnx("Out of memory");
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54 die();
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55 }
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56 return ret;
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57 }
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58
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59 void *
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60 dorealloc(void *ptr, size_t oldlen, size_t newlen)
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61 {
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62 void *ret;
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63
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64 (void)oldlen;
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65 ret = realloc(ptr, newlen);
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66 if (ret == NULL) {
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67 warnx("Out of memory");
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68 die();
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69 }
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70 return ret;
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71 }
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72
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73 void
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74 dofree(void *ptr, size_t len)
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75 {
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76 (void)len;
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77 free(ptr);
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78 }
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79
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80 char *
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81 dostrdup(const char *s)
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82 {
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83 char *ret;
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84 size_t len;
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85
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86 len = strlen(s);
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87 ret = domalloc(len+1);
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88 strcpy(ret, s);
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89 return ret;
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90 }
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91
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92 char *
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93 dostrdup2(const char *s, const char *t)
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94 {
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95 char *ret;
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96 size_t len;
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97
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98 len = strlen(s) + strlen(t);
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99 ret = domalloc(len+1);
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100 strcpy(ret, s);
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101 strcat(ret, t);
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102 return ret;
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103 }
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104
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105 char *
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106 dostrdup3(const char *s, const char *t, const char *u)
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107 {
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108 char *ret;
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109 size_t len;
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110
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111 len = strlen(s) + strlen(t) + strlen(u);
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112 ret = domalloc(len+1);
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113 strcpy(ret, s);
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114 strcat(ret, t);
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115 strcat(ret, u);
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116 return ret;
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117 }
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118
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119 char *
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120 dostrndup(const char *s, size_t len)
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121 {
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122 char *ret;
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123
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124 ret = domalloc(len+1);
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125 memcpy(ret, s, len);
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126 ret[len] = '\0';
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127 return ret;
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128 }
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129
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130 void
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131 dostrfree(char *s)
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132 {
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133 dofree(s, strlen(s)+1);
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134 }
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135
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136 size_t
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137 notrailingws(char *buf, size_t len)
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138 {
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139 while (len > 0 && strchr(ws, buf[len-1])) {
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140 buf[--len] = '\0';
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141 }
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142 return len;
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143 }
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144
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145 bool
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146 is_identifier(const char *str)
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147 {
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148 size_t len;
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149
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150 len = strlen(str);
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151 if (len != strspn(str, alnum)) {
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152 return false;
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153 }
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154 if (str[0] >= '0' && str[0] <= '9') {
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155 return false;
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156 }
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157 return true;
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158 }