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annotate common/strhelp.h @ 319:4077eff1dd39

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Added terminateing version of asprintf.
author Sascha Wilde <wilde@intevation.de>
date Fri, 04 Apr 2014 17:58:14 +0200
parents c596568fa45b
children 17e1c8f37d72
rev   line source
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1 #ifndef STRHELP_H
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2 #define STRHELP_H
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3
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4 #ifdef __cplusplus
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5 extern "C" {
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6 #endif
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7
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8 #include <stdbool.h>
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9 #include <stddef.h>
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10
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11 /**
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12 * @file strhelp.h
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13 * @brief Helper functions for c strings and memory management
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14 * @details strhelp contains terminating memory allocation functions and
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15 * some conveniance functions to work with c strings or arrays of c
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16 * strings.
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17 */
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18
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19 void *xmalloc( size_t n );
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20 void *xrealloc( void *a, size_t n );
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21 void *xcalloc( size_t n, size_t m );
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22 char *xstrndup( const char *string, const size_t len );
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23 void xfree ( void *p );
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24
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25 /**
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26 * @brief Terminating variant of asprintf
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27 *
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28 * This function behaves exactly like asprintf(3) but will terminate
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29 * when an error occures (usally that means that memoy allocation
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30 * failed).
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31 */
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32 int xasprintf (char **strp, const char *fmt, ...);
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33
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34 /**
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35 * @brief Returns the length of the given %NULL-terminated
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36 * string array str_array.
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37 * @param[in] str_array a %NULL-terminated array of strings
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38 * @returns length of str_array.
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39 */
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40 unsigned int strv_length (char **str_array);
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41
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42 /**
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43 * @brief append a string to a NULL terminated array of strings.
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44 *
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45 * @param[inout] pArray pointer to the NULL terminated list of string pointers.
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46 * @param[in] string pointer to the string to append to the list.
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47 * @param[in] len length of the string to append to the list
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48 */
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49 void strv_append (char ***pArray, const char *string, const size_t len);
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51 /**
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52 * @brief append a string to another string.
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53 *
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54 * @param[inout] pDst pointer to the string to be extended.
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55 * @param[inout] dst_len length of the dst string. Will be modified.
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56 * @param[in] appendage pointer to the string to append.
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57 * @param[in] len length of the string to append.
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58 */
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59 void str_append_str (char **pDst, size_t *dst_len, const char *appendage,
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60 const size_t len);
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61
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62 /**
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63 * @brief Frees the given %NULL-terminated string array.
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64 * @param[inout] str_array a %NULL-terminated array of strings
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65 */
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66 void strv_free (char **str_array);
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67
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68 /**
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69 * @brief Checks whether two strings exactly match
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70 * @param[in] s1 the first string
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71 * @param[in] s2 the second string
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72 * @returns true if s1 and s2 are equal
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73 */
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74 bool str_equal (char *s1, char *s2);
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75
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76 /**
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77 * @brief Checks whether s2 exactly matches the beginning of s1.
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78 * @param[in] s1 the string who's beginning is searched
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79 * @param[in] s2 the string which is searched for
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80 * @returns true if s1 starts with s2, false otherwise
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81 */
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82 bool str_starts_with (char *s1, char *s2);
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83
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84 /**
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85 * @brief Trims all white space from the start and end of string.
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86 * @details the start of the string is trimmed by setting *s to the
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87 * first non white space character. The end is trimmed by setting the
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88 * first character after the last non white space character to \0.
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89 * @param[inout] s ponter to the string to strip
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90 */
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91 bool str_trim (char **s);
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92
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93 /** @brief decode base64 encoded data
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94 *
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95 * The memory allocated for dest needs to be free'd by the
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96 * caller.
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97 *
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98 * _Input warning:_
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99 * If the input contains invalid base64 characters an error
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100 * is returned.
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101 *
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102 * If the input is invalid base64 but consists of valid
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103 * base64 characters _no error_ is returned and dst contains
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104 * the valid input up to the error.
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105 *
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106 * @param [out] dst Pointer to the destination. Needs to be NULL
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107 * @param [out] dst_size Size allocated for the destination.
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108 * @param [in] src Pointer to the base64 encoded data.
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109 * @param [in] src_size Size of the encoded data.
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110 *
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111 * @returns 0 on success a polarssl error or -1 otherwise
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112 */
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113 int str_base64_decode(char **dst, size_t *dst_size, char *src,
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114 size_t src_size);
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115
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116 #ifdef WIN32
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117
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118 /** @brief convert a utf8 string to utf16 wchar
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119 *
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120 * @param[in] string utf8 string. Must be at least len characters long.
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121 * @param[in] len number of characters to be converted.
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122 *
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123 * @returns pointer to a newly allocated wchar array. NULL on error.
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124 *
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125 **/
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126 wchar_t *utf8_to_wchar (const char *string, size_t len);
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127
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128 /** @brief convert a utf16 string to utf8
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129 *
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130 * @param[in] string utf16 string. Must be at least len characters long.
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131 * @param[in] len number of characters to be converted.
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132 *
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133 * @returns pointer to a newly allocated char array. NULL on error.
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134 *
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135 **/
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136 char *wchar_to_utf8 (const wchar_t *string, size_t len);
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137 #endif
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138
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139 #ifdef __cplusplus
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140 }
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
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141 #endif
160
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
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142
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
143 #endif
http://wald.intevation.org/projects/trustbridge/