annotate common/strhelp.c @ 1214:ae893a9a44f7

(issue68) License information README updated.
author Emanuel Schuetze <emanuel@intevation.de>
date Wed, 24 Sep 2014 08:59:57 +0200
parents ffdc8cba139a
children
rev   line source
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1 /* Copyright (C) 2014 by Bundesamt für Sicherheit in der Informationstechnik
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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 #include <ctype.h>
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12 #include <stdarg.h>
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13 #include <stdbool.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <string.h>
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17 #include <assert.h>
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18
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19 #include <polarssl/base64.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 /* Remarks regarding the "Flawfinder: ignore" comments in this file:
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26 *
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27 * - strlen:
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28 *
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29 * It's true that strlen might crash if input is not null
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30 * terminated. But by design there is not safe way to get the
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31 * length of an string in C, and defining an additional length
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32 * parameter for string parameter will only transfere the problem to
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33 * the caller.
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34 */
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35
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36 static void
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37 out_of_core(void)
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38 {
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39 fputs("\nfatal: out of memory\n", stderr);
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40 exit(2);
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41 }
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42 void *
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43 xmalloc( size_t n )
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44 {
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45 void *p = malloc( n );
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46 if( !p )
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47 out_of_core();
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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 }
131
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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 {
143
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diff changeset
142 size_t l1 = strlen(s1); /* Flawfinder: ignore */
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diff changeset
143 size_t l2 = strlen(s2); /* Flawfinder: ignore */
131
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
144 if ((l1 == l2) &&
136
5fa4791d6d0e Replaced unnecessary strncmp with strcmp.
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parents: 135
diff changeset
145 (strcmp(s1, s2) == 0))
131
9104b1b2e4da Added string comparison functions.
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diff changeset
146 return true;
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
147 else
9104b1b2e4da Added string comparison functions.
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diff changeset
148 return false;
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
149 }
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
150
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
151 bool
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
152 str_starts_with (char *s1, char *s2)
9104b1b2e4da Added string comparison functions.
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parents: 116
diff changeset
153 {
143
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diff changeset
154 size_t l2 = strlen(s2); /* Flawfinder: ignore */
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diff changeset
155 if (strncmp(s1, s2, l2) == 0)
131
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diff changeset
156 return true;
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parents: 116
diff changeset
157 else
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parents: 116
diff changeset
158 return false;
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parents: 116
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159 }
133
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
diff changeset
160
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
diff changeset
161 void
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parents: 131
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162 str_trim (char **s)
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parents: 131
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163 {
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164 size_t i;
135
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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165 if (*s != NULL)
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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parents: 134
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166 {
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
167 while (isspace(**s))
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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168 (*s)++;
143
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diff changeset
169 i = strlen(*s); /* Flawfinder: ignore */
135
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
170 while (isspace((*s)[--i]))
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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diff changeset
171 (*s)[i] = '\0';
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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parents: 134
diff changeset
172 }
133
c719d3fdbc15 Added functrion to trim white space from string.
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parents: 131
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173 }
160
bf4bfd8843bd Add memory allocating base64 decode function
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parents: 143
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174
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diff changeset
175 int str_base64_decode(char **dst, size_t *dst_size, char *src,
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176 size_t src_size)
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177 {
905
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178 int ret = -1;
160
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179
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180 if (!dst || *dst)
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181 {
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182 return -1;
160
bf4bfd8843bd Add memory allocating base64 decode function
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diff changeset
183 }
bf4bfd8843bd Add memory allocating base64 decode function
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parents: 143
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184
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185 /* Check the needed size for the buffer */
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186 ret = base64_decode(NULL, dst_size,
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187 (unsigned char *)src, src_size);
160
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188
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diff changeset
189 if (ret != 0 && ret != POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL)
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parents: 404
diff changeset
190 {
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191 return ret;
160
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parents: 143
diff changeset
192 }
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parents: 143
diff changeset
193
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diff changeset
194 *dst = xmalloc(*dst_size);
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diff changeset
195 memset (*dst, 0, *dst_size);
160
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diff changeset
196
905
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diff changeset
197 ret = base64_decode((unsigned char *)*dst, dst_size,
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diff changeset
198 (unsigned char *)src, src_size);
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diff changeset
199 if (ret)
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parents: 404
diff changeset
200 {
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parents: 404
diff changeset
201 free (*dst);
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diff changeset
202 *dst = NULL;
698b6a9bd75e Fix coding style for C code
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diff changeset
203 *dst_size = 0;
160
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diff changeset
204 }
905
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205 return ret;
160
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parents: 143
diff changeset
206 }
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
207
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
208 void
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
209 xfree (void *p)
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
210 {
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
211 if (p)
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
212 free (p);
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
213 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
214
319
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
215 int
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
216 xasprintf (char **strp, const char *fmt, ...)
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
217 {
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
218 int ret;
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
219 va_list ap;
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
220 va_start(ap, fmt);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
221 ret = vasprintf(strp, fmt, ap);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
222 va_end(ap);
4077eff1dd39 Added terminateing version of asprintf.
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parents: 288
diff changeset
223
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
224 if (ret == -1)
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
225 out_of_core();
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
226
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
227 return ret;
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
228 }
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 288
diff changeset
229
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
230 #ifdef WIN32
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
231 /* Adapted from GPGOL rev. e512053 */
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
232 char *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
233 wchar_to_utf8 (const wchar_t *string, size_t len)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
234 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
235 int n, ilen;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
236 char *result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
237
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
238 ilen = (int) len;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
239 if (ilen < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
240 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
241
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
242 /* Note, that CP_UTF8 is not defined in Windows versions earlier
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
243 than NT.*/
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Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
244 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, NULL, 0, NULL, NULL);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
245 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
246 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
247
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
248 result = xmalloc ((size_t)n+1);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
249 n = WideCharToMultiByte (CP_UTF8, 0, string, ilen, result, n, NULL, NULL);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
250 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
251 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
252 xfree (result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
253 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
254 }
288
c4a989a0d6cf Ensure that the utf8 string is always 0 terminated.
Andre Heinecke <aheinecke@intevation.de>
parents: 251
diff changeset
255 result[n] = 0;
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
256 return result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
257 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
258
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
259 /* Adapted from GPGOL rev. e512053 */
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
260 wchar_t *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
261 utf8_to_wchar (const char *string, size_t len)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
262 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
263 int n, ilen;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
264 wchar_t *result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
265
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
266 ilen = (int) len;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
267 if (ilen < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
268 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
269
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
270 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, NULL, 0);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
271 if (n < 0 || n + 1 < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
272 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
273
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
274 result = xmalloc ((size_t)(n+1) * sizeof *result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
275 n = MultiByteToWideChar (CP_UTF8, 0, string, ilen, result, n);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
276 if (n < 0)
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
277 {
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
278 xfree (result);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
279 return NULL;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
280 }
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
281 result[n] = 0;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
282 return result;
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 183
diff changeset
283 }
1158
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
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diff changeset
284
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
285 wchar_t
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
286 *acp_to_wchar (const char *string, size_t len)
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
287 {
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
288 int n, ilen;
ffdc8cba139a (issue36) Add acp_to_wchar based on utf8_to_wchar
Andre Heinecke <andre.heinecke@intevation.de>
parents: 905
diff changeset
289 wchar_t *result;
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290
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291 ilen = (int) len;
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292 if (ilen < 0)
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293 return NULL;
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294
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295 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, NULL, 0);
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296 if (n < 0 || n + 1 < 0)
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297 return NULL;
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298
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299 result = xmalloc ((size_t)(n+1) * sizeof *result);
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300 n = MultiByteToWideChar (CP_ACP, 0, string, ilen, result, n);
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301 if (n < 0)
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302 {
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303 xfree (result);
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304 return NULL;
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305 }
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306 result[n] = 0;
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307 return result;
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308 }
251
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309 #endif

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