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annotate common/strhelp.c @ 143:b026e6d2a161

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Make flawfinder (a bit more) happy.
author Sascha Wilde <wilde@intevation.de>
date Mon, 24 Mar 2014 16:09:47 +0100
parents 5fa4791d6d0e
children bf4bfd8843bd
rev   line source
134
5f830969e4a1 Added missing include.
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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
143
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8 /* Remarks regarding the "Flawfinder: ignore" comments in this file:
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9 *
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10 * - strlen:
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11 *
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12 * It's true that strlen might crash if input is not null
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13 * terminated. But by design there is not safe way to get the
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14 * length of an string in C, and defining an additional length
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15 * parameter for string parameter will only transfere the problem to
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16 * the caller.
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17 */
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18
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19 static void
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20 out_of_core(void)
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21 {
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22 fputs("\nfatal: out of memory\n", stderr);
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23 exit(2);
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24 }
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25 void *
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26 xmalloc( size_t n )
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27 {
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28 void *p = malloc( n );
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29 if( !p )
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30 out_of_core();
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31 return p;
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32 }
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33
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34 void *
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35 xrealloc( void *a, size_t n )
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36 {
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37 void *p = realloc( a, n );
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38 if( !p )
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39 out_of_core();
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40 return p;
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41 }
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42
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43 char *
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44 xstrndup( const char *string, const size_t len )
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45 {
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46 char *p = xmalloc( len + 1 );
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47 memcpy( p, string, len );
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48 p[len] = '\0';
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49 return p;
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50 }
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51
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52 unsigned int
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53 strv_length (char **str_array)
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54 {
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55 unsigned int i = 0;
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56
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57 if (!str_array)
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58 return 0;
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59
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60 while (str_array[i])
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61 ++i;
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62
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63 return i;
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64 }
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65
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66 void strv_append (char ***pArray, const char *string, const size_t len)
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67 {
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68 unsigned int old_len = 0;
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69
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70 if (!*pArray) {
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71 *pArray = xmalloc(2 * sizeof(char*));
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72 (*pArray)[0] = xstrndup(string, len);
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73 (*pArray)[1] = NULL;
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74 return;
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75 }
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76 old_len = strv_length(*pArray);
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77 *pArray = xrealloc(*pArray, sizeof(char**) * (old_len + 2));
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78
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79 (*pArray)[old_len] = xstrndup(string, len);
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80 (*pArray)[old_len + 1] = NULL;
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81 }
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82
91
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83 void
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84 str_append_str(char **pDst, size_t *dst_len, const char *appendage, const size_t len)
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85 {
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86 if (!appendage)
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87 return;
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88
91
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89 if (!(*pDst)) {
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90 *pDst = xstrndup(appendage, len);
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91 *dst_len = len;
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92 } else {
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93 size_t new_size = (*dst_len) + len + 1;
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94 char *p_old = *pDst;
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95 *pDst = xmalloc(new_size);
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96 strncpy(*pDst, p_old, *dst_len);
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97 strncpy(*pDst + *dst_len, appendage, len);
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98 *dst_len = new_size - 1;
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99 (*pDst)[*dst_len] = '\0';
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100 free (p_old);
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101 }
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102 }
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103
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104 void
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105 strv_free (char **str_array)
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106 {
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107 if (str_array)
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108 {
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109 int i;
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110
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111 for (i = 0; str_array[i] != NULL; i++)
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112 free (str_array[i]);
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113
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114 free (str_array);
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115 }
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116 }
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117
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118 bool
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119 str_equal (char *s1, char *s2)
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120 {
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121 size_t l1 = strlen(s1); /* Flawfinder: ignore */
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122 size_t l2 = strlen(s2); /* Flawfinder: ignore */
131
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123 if ((l1 == l2) &&
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124 (strcmp(s1, s2) == 0))
131
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125 return true;
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126 else
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127 return false;
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128 }
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129
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130 bool
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131 str_starts_with (char *s1, char *s2)
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132 {
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133 size_t l2 = strlen(s2); /* Flawfinder: ignore */
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134 if (strncmp(s1, s2, l2) == 0)
131
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135 return true;
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136 else
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137 return false;
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138 }
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139
c719d3fdbc15 Added functrion to trim white space from string.
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140 void
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141 str_trim (char **s)
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142 {
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143 size_t i;
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3fb6ddd6b70d str_trim: do nothing if *s is NULL.
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144 if (*s != NULL)
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145 {
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146 while (isspace(**s))
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147 (*s)++;
143
b026e6d2a161 Make flawfinder (a bit more) happy.
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148 i = strlen(*s); /* Flawfinder: ignore */
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149 while (isspace((*s)[--i]))
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150 (*s)[i] = '\0';
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151 }
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152 }
http://wald.intevation.org/projects/trustbridge/