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annotate src/strhelp.c @ 81:f3481e9e44b2

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author Andre Heinecke <andre.heinecke@intevation.de>
date Wed, 05 Oct 2016 14:28:53 +0200
parents 8b4c49c92451
children
rev   line source
3
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1 /* Copyright (C) 2015 by ETH Zürich
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2 * Software engineering by Intevation GmbH
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3 *
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4 * This file is Free Software under the GNU GPL (v>=2)
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5 * and comes with ABSOLUTELY NO WARRANTY!
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6 * See LICENSE.txt for details.
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7 */
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8 /* Needed to get asprintf */
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9 #define _GNU_SOURCE 1
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10
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11 /** @file See strhelp.h for documentation. */
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12
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13 #include <ctype.h>
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14 #include <stdarg.h>
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15 #include <stdbool.h>
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16 #include <stdio.h>
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17 #include <stdlib.h>
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18 #include <string.h>
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19 #include <assert.h>
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20
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21 #ifdef WIN32
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22 #include <windows.h>
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23 #endif
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24
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25 static void
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26 out_of_core(void)
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27 {
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28 fputs("\nfatal: out of memory\n", stderr);
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29 exit(2);
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30 }
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31
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32 void *
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33 xmalloc( size_t n )
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34 {
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35 void *p = malloc( n );
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36 if( !p )
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37 out_of_core();
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38 return p;
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39 }
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40
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41 void *
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42 xmalloc0( size_t n )
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43 {
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44 void *p = malloc( n );
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45 if( !p )
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46 out_of_core();
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47 memset (p, 0, n);
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48 return p;
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49 }
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50
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51 void *
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52 xrealloc( void *a, size_t n )
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53 {
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54 void *p = realloc( a, n );
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55 if( !p )
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56 out_of_core();
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57 return p;
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58 }
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59
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60 char *
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61 xstrndup( const char *string, const size_t len )
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62 {
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63 char *p = xmalloc( len + 1 );
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64 memcpy( p, string, len );
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65 p[len] = '\0';
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66 return p;
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67 }
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68
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69 unsigned int
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70 strv_length (char **str_array)
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71 {
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72 unsigned int i = 0;
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73
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74 if (!str_array)
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75 return 0;
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76
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77 while (str_array[i])
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78 ++i;
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79
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80 return i;
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81 }
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82
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83 void strv_append (char ***pArray, const char *string, const size_t len)
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84 {
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85 unsigned int old_len = 0;
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86
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87 if (!*pArray)
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88 {
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89 *pArray = xmalloc(2 * sizeof(char*));
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90 (*pArray)[0] = xstrndup(string, len);
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91 (*pArray)[1] = NULL;
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92 return;
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93 }
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94 old_len = strv_length(*pArray);
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95 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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96
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97 (*pArray)[old_len] = xstrndup(string, len);
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98 (*pArray)[old_len + 1] = NULL;
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99 }
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100
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101 void
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102 str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
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103 {
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104 if (!appendage)
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105 return;
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106
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107 if (!(*pDst))
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108 {
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109 *pDst = xstrndup(appendage, len);
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110 *dst_len = len;
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111 }
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112 else
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113 {
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114 size_t new_size = (*dst_len) + len + 1;
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115 char *p_old = *pDst;
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116 *pDst = xmalloc(new_size);
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117 strncpy(*pDst, p_old, *dst_len);
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118 strncpy(*pDst + *dst_len, appendage, len);
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119 *dst_len = new_size - 1;
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120 (*pDst)[*dst_len] = '\0';
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121 free (p_old);
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122 }
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123 }
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124
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125 void
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126 strv_free (char **str_array)
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127 {
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128 if (str_array)
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129 {
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130 int i;
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131
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132 for (i = 0; str_array[i] != NULL; i++)
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133 free (str_array[i]);
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134
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135 free (str_array);
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136 }
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137 }
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138
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139 bool
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140 str_equal (char *s1, char *s2)
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141 {
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142 size_t l1 = strlen(s1);
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143 size_t l2 = strlen(s2);
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144 if ((l1 == l2) &&
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145 (strcmp(s1, s2) == 0))
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146 return true;
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147 else
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148 return false;
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149 }
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150
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151 bool
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152 str_starts_with (char *s1, char *s2)
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153 {
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154 size_t l2 = strlen(s2);
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155 if (strncmp(s1, s2, l2) == 0)
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156 return true;
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157 else
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158 return false;
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159 }
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160
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161 void
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162 str_trim (char **s)
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163 {
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164 size_t i;
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165 if (*s != NULL)
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166 {
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167 while (isspace(**s))
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168 (*s)++;
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169 i = strlen(*s);
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170 while (isspace((*s)[--i]))
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171 (*s)[i] = '\0';
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172 }
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173 }
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174
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175 void
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176 xfree (void *p)
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177 {
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178 if (p)
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179 free (p);
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180 }
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181
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182 int
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183 xasprintf (char **strp, const char *fmt, ...)
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184 {
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185 int ret;
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186 va_list ap;
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187 va_start(ap, fmt);
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188 ret = vasprintf(strp, fmt, ap);
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189 va_end(ap);
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190
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191 if (ret == -1)
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192 out_of_core();
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193
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194 return ret;
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195 }
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196
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197 #ifdef WIN32
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198 /* Adapted from GPGOL rev. e512053 */
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199 char *
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200 wchar_to_utf8 (const wchar_t *string, size_t len)
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201 {
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202 int n, ilen;
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203 char *result;
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204
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205 ilen = (int) len;
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206 if (ilen < 0)
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207 return NULL;
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208
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209 /* Note, that CP_UTF8 is not defined in Windows versions earlier
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210 than NT.*/
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211 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, NULL, 0, NULL, NULL);
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212 if (n < 0)
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213 return NULL;
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214
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215 result = xmalloc ((size_t)n+1);
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216 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, result, n, NULL, NULL);
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217 if (n < 0)
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218 {
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219 xfree (result);
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220 return NULL;
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221 }
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222 result[n] = 0;
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223 return result;
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224 }
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225
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226 /* Adapted from GPGOL rev. e512053 */
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227 wchar_t *
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228 utf8_to_wchar (const char *string, size_t len)
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229 {
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230 int n, ilen;
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231 wchar_t *result;
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232
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233 ilen = (int) len;
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234 if (ilen < 0)
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235 return NULL;
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236
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237 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, NULL, 0);
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238 if (n < 0 || n + 1 < 0)
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239 return NULL;
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240
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241 result = xmalloc ((size_t)(n+1) * sizeof *result);
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242 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, result, n);
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243 if (n < 0)
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244 {
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245 xfree (result);
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246 return NULL;
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247 }
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248 result[n] = 0;
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249 return result;
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250 }
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251
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252 wchar_t
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253 *acp_to_wchar (const char *string, size_t len)
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254 {
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255 int n, ilen;
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256 wchar_t *result;
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257
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258 ilen = (int) len;
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259 if (ilen < 0)
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260 return NULL;
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261
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262 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, NULL, 0);
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263 if (n < 0 || n + 1 < 0)
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264 return NULL;
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265
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266 result = xmalloc ((size_t)(n+1) * sizeof *result);
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267 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, result, n);
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268 if (n < 0)
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269 {
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270 xfree (result);
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271 return NULL;
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272 }
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273 result[n] = 0;
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274 return result;
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275 }
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276 #endif
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277
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