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annotate common/strhelp.c @ 160:bf4bfd8843bd

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Add memory allocating base64 decode function
author Andre Heinecke <aheinecke@intevation.de>
date Tue, 25 Mar 2014 10:07:12 +0000
parents b026e6d2a161
children 4def8b263dd3
rev   line source
134
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diff changeset
1 #include <ctype.h>
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2 #include <stdbool.h>
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3 #include <stdio.h>
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4 #include <stdlib.h>
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5 #include <string.h>
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6 #include <assert.h>
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7
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8 #include <polarssl/base64.h>
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9
143
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10 /* Remarks regarding the "Flawfinder: ignore" comments in this file:
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11 *
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12 * - strlen:
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13 *
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14 * It's true that strlen might crash if input is not null
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15 * terminated. But by design there is not safe way to get the
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16 * length of an string in C, and defining an additional length
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17 * parameter for string parameter will only transfere the problem to
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18 * the caller.
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19 */
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20
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21 static void
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22 out_of_core(void)
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23 {
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24 fputs("\nfatal: out of memory\n", stderr);
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25 exit(2);
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26 }
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27 void *
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28 xmalloc( size_t n )
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29 {
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30 void *p = malloc( n );
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31 if( !p )
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32 out_of_core();
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33 return p;
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34 }
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35
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36 void *
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37 xrealloc( void *a, size_t n )
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38 {
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39 void *p = realloc( a, n );
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40 if( !p )
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41 out_of_core();
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42 return p;
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43 }
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44
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45 char *
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46 xstrndup( const char *string, const size_t len )
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47 {
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48 char *p = xmalloc( len + 1 );
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49 memcpy( p, string, len );
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50 p[len] = '\0';
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51 return p;
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52 }
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53
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54 unsigned int
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55 strv_length (char **str_array)
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56 {
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57 unsigned int i = 0;
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58
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59 if (!str_array)
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60 return 0;
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61
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62 while (str_array[i])
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63 ++i;
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64
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65 return i;
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66 }
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67
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68 void strv_append (char ***pArray, const char *string, const size_t len)
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69 {
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70 unsigned int old_len = 0;
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71
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72 if (!*pArray) {
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73 *pArray = xmalloc(2 * sizeof(char*));
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74 (*pArray)[0] = xstrndup(string, len);
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75 (*pArray)[1] = NULL;
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76 return;
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77 }
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78 old_len = strv_length(*pArray);
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79 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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80
60
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81 (*pArray)[old_len] = xstrndup(string, len);
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82 (*pArray)[old_len + 1] = NULL;
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83 }
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84
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85 void
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86 str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
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87 {
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88 if (!appendage)
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89 return;
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90
91
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91 if (!(*pDst)) {
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92 *pDst = xstrndup(appendage, len);
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93 *dst_len = len;
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94 } else {
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95 size_t new_size = (*dst_len) + len + 1;
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96 char *p_old = *pDst;
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97 *pDst = xmalloc(new_size);
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98 strncpy(*pDst, p_old, *dst_len);
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99 strncpy(*pDst + *dst_len, appendage, len);
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100 *dst_len = new_size - 1;
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101 (*pDst)[*dst_len] = '\0';
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102 free (p_old);
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103 }
59
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104 }
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105
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106 void
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107 strv_free (char **str_array)
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108 {
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109 if (str_array)
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110 {
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111 int i;
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112
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113 for (i = 0; str_array[i] != NULL; i++)
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114 free (str_array[i]);
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115
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116 free (str_array);
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117 }
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118 }
131
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119
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120 bool
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121 str_equal (char *s1, char *s2)
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122 {
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123 size_t l1 = strlen(s1); /* Flawfinder: ignore */
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124 size_t l2 = strlen(s2); /* Flawfinder: ignore */
131
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125 if ((l1 == l2) &&
136
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126 (strcmp(s1, s2) == 0))
131
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127 return true;
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128 else
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129 return false;
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130 }
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131
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132 bool
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133 str_starts_with (char *s1, char *s2)
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134 {
143
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135 size_t l2 = strlen(s2); /* Flawfinder: ignore */
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136 if (strncmp(s1, s2, l2) == 0)
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137 return true;
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138 else
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139 return false;
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140 }
133
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141
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142 void
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143 str_trim (char **s)
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144 {
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145 size_t i;
135
3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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146 if (*s != NULL)
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147 {
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148 while (isspace(**s))
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149 (*s)++;
143
b026e6d2a161 Make flawfinder (a bit more) happy.
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150 i = strlen(*s); /* Flawfinder: ignore */
135
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151 while (isspace((*s)[--i]))
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152 (*s)[i] = '\0';
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153 }
133
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154 }
160
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155
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156 int str_base64_decode(char **dst, size_t *dst_size, char *src,
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157 size_t src_size)
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158 {
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159 int ret = -1;
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160
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161 if (!dst || *dst) {
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162 return -1;
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163 }
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164
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165 /* Check the needed size for the buffer */
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166 ret = base64_decode(NULL, dst_size,
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167 (unsigned char *)src, src_size);
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168
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169 if (ret != 0 && ret != POLARSSL_ERR_BASE64_BUFFER_TOO_SMALL) {
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170 return ret;
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171 }
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172
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173 *dst = xmalloc(*dst_size);
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174 memset (*dst, 0, *dst_size);
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175
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176 ret = base64_decode((unsigned char *)*dst, dst_size,
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177 (unsigned char *)src, src_size);
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178 if (!ret) {
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179 free (*dst);
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180 *dst = NULL;
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181 dst_size = 0;
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182 }
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183 return ret;
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184 }
http://wald.intevation.org/projects/trustbridge/