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3
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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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16
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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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3
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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 len)
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61 {
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62 void *ret;
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63
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64 ret = realloc(ptr, len);
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65 if (ret == NULL) {
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66 warnx("Out of memory");
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67 die();
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68 }
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69 return ret;
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70 }
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71
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72 char *
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73 dostrdup(const char *s)
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74 {
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75 char *ret;
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76 size_t len;
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77
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78 len = strlen(s);
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79 ret = domalloc(len+1);
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80 strcpy(ret, s);
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81 return ret;
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82 }
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83
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84 char *
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85 dostrdup2(const char *s, const char *t)
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86 {
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87 char *ret;
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88 size_t len;
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89
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90 len = strlen(s) + strlen(t);
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91 ret = domalloc(len+1);
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92 strcpy(ret, s);
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93 strcat(ret, t);
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94 return ret;
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95 }
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96
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97 char *
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98 dostrdup3(const char *s, const char *t, const char *u)
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99 {
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100 char *ret;
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101 size_t len;
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102
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103 len = strlen(s) + strlen(t) + strlen(u);
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104 ret = domalloc(len+1);
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105 strcpy(ret, s);
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106 strcat(ret, t);
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107 strcat(ret, u);
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108 return ret;
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109 }
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110
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20
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111 char *
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112 dostrndup(const char *s, size_t len)
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113 {
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114 char *ret;
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115
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116 ret = domalloc(len+1);
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117 memcpy(ret, s, len);
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118 ret[len] = '\0';
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119 return ret;
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120 }
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121
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18
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122 size_t
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123 notrailingws(char *buf, size_t len)
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124 {
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125 while (len > 0 && strchr(ws, buf[len-1])) {
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126 buf[--len] = '\0';
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127 }
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128 return len;
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129 }
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130
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131 bool
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132 is_identifier(const char *str)
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133 {
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134 size_t len;
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135
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136 len = strlen(str);
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137 if (len != strspn(str, alnum)) {
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138 return false;
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139 }
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140 if (str[0] >= '0' && str[0] <= '9') {
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141 return false;
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142 }
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143 return true;
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144 }
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