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annotate common/strhelp.h @ 197:5d380b662198

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author Sascha Wilde <wilde@intevation.de>
date Wed, 26 Mar 2014 12:37:19 +0100
parents bf4bfd8843bd
children 1f44aae4528e
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 #include <stdbool.h>
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5
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6 /**
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7 * @file strhelp.h
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8 * @brief Helper functions for c strings and memory management
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9 * @details strhelp contains terminating memory allocation functions and
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10 * some conveniance functions to work with c strings or arrays of c
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11 * strings.
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12 */
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13
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14 void *xmalloc( size_t n );
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15 void *xrealloc( void *a, size_t n );
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16 void *xcalloc( size_t n, size_t m );
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17 char *xstrndup( const char *string, const size_t len );
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18
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19 /**
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20 * @brief Returns the length of the given %NULL-terminated
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21 * string array str_array.
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22 * @param[in] str_array a %NULL-terminated array of strings
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23 * @returns length of str_array.
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24 */
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25 unsigned int strv_length (char **str_array);
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27 /**
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28 * @brief append a string to a NULL terminated array of strings.
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29 *
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30 * @param[inout] pArray pointer to the NULL terminated list of string pointers.
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31 * @param[in] string pointer to the string to append to the list.
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32 * @param[in] len length of the string to append to the list
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33 */
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34 void strv_append (char ***pArray, const char *string, const size_t len);
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35
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36 /**
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37 * @brief append a string to another string.
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38 *
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39 * @param[inout] pDst pointer to the string to be extended.
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40 * @param[inout] dst_len length of the dst string. Will be modified.
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41 * @param[in] appendage pointer to the string to append.
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42 * @param[in] len length of the string to append.
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43 */
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44 void str_append_str (char **pDst, size_t *dst_len, const char *appendage,
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45 const size_t len);
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46
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47 /**
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48 * @brief Frees the given %NULL-terminated string array.
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49 * @param[inout] str_array a %NULL-terminated array of strings
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50 */
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51 void strv_free (char **str_array);
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52
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53 /**
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54 * @brief Checks whether two strings exactly match
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55 * @param[in] s1 the first string
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56 * @param[in] s2 the second string
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57 * @returns true if s1 and s2 are equal
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58 */
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59 bool str_equal (char *s1, char *s2);
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60
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61 /**
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62 * @brief Checks whether s2 exactly matches the beginning of s1.
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63 * @param[in] s1 the string who's beginning is searched
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64 * @param[in] s2 the string which is searched for
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65 * @returns true if s1 starts with s2, false otherwise
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66 */
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67 bool str_starts_with (char *s1, char *s2);
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68
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69 /**
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70 * @brief Trims all white space from the start and end of string.
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71 * @details the start of the string is trimmed by setting *s to the
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72 * first non white space character. The end is trimmed by setting the
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73 * first character after the last non white space character to \0.
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74 * @param[inout] s ponter to the string to strip
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75 */
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76 bool str_trim (char **s);
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77
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78 /** @brief decode base64 encoded data
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79 *
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80 * The memory allocated for dest needs to be free'd by the
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81 * caller.
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82 *
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83 * @param [out] dst Pointer to the destination. Needs to be NULL
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84 * @param [out] dst_size Size allocated for the destination.
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85 * @param [in] src Pointer to the base64 encoded data.
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86 * @param [in] src_size Size of the encoded data.
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87 *
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88 * @returns 0 on success a polarssl error or -1 otherwise
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89 */
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90 int str_base64_decode(char **dst, size_t *dst_size, char *src,
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91 size_t src_size);
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92
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93 #endif
http://wald.intevation.org/projects/trustbridge/