annotate utils.c @ 56:fabdb7db1472

Test case for comments in conditional lines
author Joerg Sonnenberger <joerg@bec.de>
date Sun, 31 Mar 2013 06:28:55 +0200
parents ef8bedab8a4b
children 60184aa42604
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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 <assert.h>
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33 #include <err.h>
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34
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35 #include "utils.h"
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36
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37 #define MALLOCDEBUG
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38
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39 const char ws[] =
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40 " \t\f\v"
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41 ;
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42 const char alnum[] =
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43 "0123456789"
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44 "abcdefghijklmnopqrstuvwxyz"
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45 "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
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46 "_"
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47 ;
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48
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49 ////////////////////////////////////////////////////////////
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50 // malloc
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51
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52 #define ROUNDUP(len, size) ((size) * (((len) + (size) - 1) / (size)))
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53
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54 #ifdef MALLOCDEBUG
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55
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56 struct mallocheader {
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57 struct mallocheader *self;
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58 size_t len;
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59 };
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60
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61 static
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62 size_t
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63 adjustsize(size_t len)
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64 {
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65 const size_t sz = sizeof(struct mallocheader);
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66 return ROUNDUP(len, sz) + 2*sz;
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67 }
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68
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69 static
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70 void *
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71 placeheaders(void *block, size_t len)
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72 {
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73 struct mallocheader *bothdr, *tophdr;
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74 size_t roundedlen;
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75 void *ret;
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76
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77 roundedlen = ROUNDUP(len, sizeof(struct mallocheader));
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78 bothdr = block;
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79 bothdr->len = len;
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80 bothdr->self = block;
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81 ret = bothdr + 1;
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82 tophdr = (void *)(((unsigned char *)ret) + roundedlen);
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83 tophdr->len = len;
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84 tophdr->self = bothdr;
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85 return ret;
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86 }
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87
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88 static
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89 void *
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90 checkheaders(void *block, size_t len)
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91 {
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92 struct mallocheader *bothdr, *tophdr;
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93 size_t roundedlen;
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94
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95 if (block == NULL) {
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96 assert(len == 0);
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97 return block;
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98 }
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99
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100 roundedlen = ROUNDUP(len, sizeof(struct mallocheader));
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101 bothdr = block;
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102 bothdr--;
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103 assert(bothdr->self == bothdr);
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104 assert(bothdr->len == len);
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105 tophdr = (void *)(((unsigned char *)(bothdr + 1)) + roundedlen);
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106 assert(tophdr->self == bothdr);
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107 assert(tophdr->len == len);
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108 return bothdr;
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109 }
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110
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111 #else
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112
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113 #define adjustsize(len) (len)
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114 #define placeheaders(block, len) ((void)(len), (block))
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115 #define checkheaders(ptr, len) ((void)(len), (ptr))
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116
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117 #endif /* MALLOCDEBUG */
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118
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119 void *
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120 domalloc(size_t len)
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121 {
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122 void *ret;
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123 size_t blocklen;
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124
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125 blocklen = adjustsize(len);
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126 ret = malloc(blocklen);
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127 if (ret == NULL) {
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128 warnx("Out of memory");
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129 die();
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130 }
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131
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132 return placeheaders(ret, len);
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133 }
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134
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135 void *
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136 dorealloc(void *ptr, size_t oldlen, size_t newlen)
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137 {
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138 void *ret;
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139 void *blockptr;
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140 size_t newblocklen;
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141
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142 blockptr = checkheaders(ptr, oldlen);
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143 newblocklen = adjustsize(newlen);
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144
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145 ret = realloc(blockptr, newblocklen);
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146 if (ret == NULL) {
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147 warnx("Out of memory");
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148 die();
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149 }
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150
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151 return placeheaders(ret, newlen);
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152 }
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153
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154 void
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155 dofree(void *ptr, size_t len)
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156 {
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157 void *blockptr;
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158
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159 blockptr = checkheaders(ptr, len);
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160 free(blockptr);
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161 }
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162
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163 ////////////////////////////////////////////////////////////
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164 // string allocators
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165
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166 char *
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167 dostrdup(const char *s)
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168 {
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169 char *ret;
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170 size_t len;
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171
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172 len = strlen(s);
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173 ret = domalloc(len+1);
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174 strcpy(ret, s);
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175 return ret;
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176 }
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177
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178 char *
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179 dostrdup2(const char *s, const char *t)
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180 {
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181 char *ret;
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182 size_t len;
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183
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184 len = strlen(s) + strlen(t);
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185 ret = domalloc(len+1);
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186 strcpy(ret, s);
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187 strcat(ret, t);
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188 return ret;
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189 }
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190
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191 char *
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192 dostrdup3(const char *s, const char *t, const char *u)
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193 {
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194 char *ret;
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195 size_t len;
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196
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197 len = strlen(s) + strlen(t) + strlen(u);
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198 ret = domalloc(len+1);
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199 strcpy(ret, s);
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200 strcat(ret, t);
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201 strcat(ret, u);
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202 return ret;
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203 }
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204
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205 char *
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206 dostrndup(const char *s, size_t len)
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207 {
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208 char *ret;
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209
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210 ret = domalloc(len+1);
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211 memcpy(ret, s, len);
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212 ret[len] = '\0';
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213 return ret;
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214 }
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215
39
337110e7240a Pass the size to free; it makes debug checking easier.
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216 void
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217 dostrfree(char *s)
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218 {
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219 dofree(s, strlen(s)+1);
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220 }
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221
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ef8bedab8a4b Add malloc debug code.
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222 ////////////////////////////////////////////////////////////
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223 // other stuff
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224
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225 size_t
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226 notrailingws(char *buf, size_t len)
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227 {
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228 while (len > 0 && strchr(ws, buf[len-1])) {
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229 buf[--len] = '\0';
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230 }
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231 return len;
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232 }
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233
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234 bool
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235 is_identifier(const char *str)
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236 {
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237 size_t len;
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238
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239 len = strlen(str);
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240 if (len != strspn(str, alnum)) {
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241 return false;
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242 }
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243 if (str[0] >= '0' && str[0] <= '9') {
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244 return false;
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245 }
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246 return true;
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247 }