Mercurial > trustbridge

annotate common/strhelp.h @ 333:de94c4ec22b1

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Renamed management to administrator application.
author Raimund Renkert <rrenkert@intevation.de>
date Wed, 09 Apr 2014 12:41:07 +0200
parents 4077eff1dd39
children 17e1c8f37d72
rev   line source
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
1 #ifndef STRHELP_H
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
2 #define STRHELP_H
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
3
184
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
4 #ifdef __cplusplus
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
5 extern "C" {
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
6 #endif
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
7
131
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
8 #include <stdbool.h>
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
9 #include <stddef.h>
131
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
10
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
11 /**
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
12 * @file strhelp.h
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
13 * @brief Helper functions for c strings and memory management
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
14 * @details strhelp contains terminating memory allocation functions and
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
15 * some conveniance functions to work with c strings or arrays of c
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
16 * strings.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
17 */
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
18
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
19 void *xmalloc( size_t n );
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
20 void *xrealloc( void *a, size_t n );
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
21 void *xcalloc( size_t n, size_t m );
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
22 char *xstrndup( const char *string, const size_t len );
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
23 void xfree ( void *p );
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
24
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
25 /**
319
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
26 * @brief Terminating variant of asprintf
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
27 *
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
28 * This function behaves exactly like asprintf(3) but will terminate
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
29 * when an error occures (usally that means that memoy allocation
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
30 * failed).
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
31 */
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
32 int xasprintf (char **strp, const char *fmt, ...);
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
33
4077eff1dd39 Added terminateing version of asprintf.
Sascha Wilde <wilde@intevation.de>
parents: 251
diff changeset
34 /**
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
35 * @brief Returns the length of the given %NULL-terminated
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
36 * string array str_array.
120
702033705bb8 Removed trailing whitespace.
Sascha Wilde <wilde@intevation.de>
parents: 118
diff changeset
37 * @param[in] str_array a %NULL-terminated array of strings
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
38 * @returns length of str_array.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
39 */
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
40 unsigned int strv_length (char **str_array);
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
41
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
42 /**
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
43 * @brief append a string to a NULL terminated array of strings.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
44 *
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
45 * @param[inout] pArray pointer to the NULL terminated list of string pointers.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
46 * @param[in] string pointer to the string to append to the list.
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
47 * @param[in] len length of the string to append to the list
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
48 */
116
c602d8cfa619 Refactoring: unified naming of string vector functions.
Sascha Wilde <wilde@intevation.de>
parents: 91
diff changeset
49 void strv_append (char ***pArray, const char *string, const size_t len);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
50
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
51 /**
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
52 * @brief append a string to another string.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
53 *
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
54 * @param[inout] pDst pointer to the string to be extended.
91
80ab2168760f Also add output size handling to str_append_str
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
55 * @param[inout] dst_len length of the dst string. Will be modified.
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
56 * @param[in] appendage pointer to the string to append.
60
6acb1dae6185 Use strn functions and improve error handling.
Andre Heinecke <aheinecke@intevation.de>
parents: 59
diff changeset
57 * @param[in] len length of the string to append.
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
58 */
116
c602d8cfa619 Refactoring: unified naming of string vector functions.
Sascha Wilde <wilde@intevation.de>
parents: 91
diff changeset
59 void str_append_str (char **pDst, size_t *dst_len, const char *appendage,
91
80ab2168760f Also add output size handling to str_append_str
Andre Heinecke <aheinecke@intevation.de>
parents: 60
diff changeset
60 const size_t len);
59
3f6378647371 Start work on cinst. Strhelp new helpers to work with C String
Andre Heinecke <aheinecke@intevation.de>
parents:
diff changeset
61
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
62 /**
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
63 * @brief Frees the given %NULL-terminated string array.
120
702033705bb8 Removed trailing whitespace.
Sascha Wilde <wilde@intevation.de>
parents: 118
diff changeset
64 * @param[inout] str_array a %NULL-terminated array of strings
118
d6a74464430b Fix doxygen documentation.
Sascha Wilde <wilde@intevation.de>
parents: 116
diff changeset
65 */
116
c602d8cfa619 Refactoring: unified naming of string vector functions.
Sascha Wilde <wilde@intevation.de>
parents: 91
diff changeset
66 void strv_free (char **str_array);
131
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
67
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
68 /**
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
69 * @brief Checks whether two strings exactly match
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
70 * @param[in] s1 the first string
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
71 * @param[in] s2 the second string
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
72 * @returns true if s1 and s2 are equal
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
73 */
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
74 bool str_equal (char *s1, char *s2);
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
75
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
76 /**
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
77 * @brief Checks whether s2 exactly matches the beginning of s1.
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
78 * @param[in] s1 the string who's beginning is searched
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
79 * @param[in] s2 the string which is searched for
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
80 * @returns true if s1 starts with s2, false otherwise
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
81 */
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
82 bool str_starts_with (char *s1, char *s2);
9104b1b2e4da Added string comparison functions.
Sascha Wilde <wilde@intevation.de>
parents: 120
diff changeset
83
133
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
84 /**
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
85 * @brief Trims all white space from the start and end of string.
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
86 * @details the start of the string is trimmed by setting *s to the
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
87 * first non white space character. The end is trimmed by setting the
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
88 * first character after the last non white space character to \0.
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
89 * @param[inout] s ponter to the string to strip
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
90 */
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
91 bool str_trim (char **s);
c719d3fdbc15 Added functrion to trim white space from string.
Sascha Wilde <wilde@intevation.de>
parents: 131
diff changeset
92
160
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
93 /** @brief decode base64 encoded data
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
94 *
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
95 * The memory allocated for dest needs to be free'd by the
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
96 * caller.
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
97 *
239
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
98 * _Input warning:_
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
99 * If the input contains invalid base64 characters an error
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
100 * is returned.
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
101 *
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
102 * If the input is invalid base64 but consists of valid
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
103 * base64 characters _no error_ is returned and dst contains
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
104 * the valid input up to the error.
6b4ad6ccc48e Change the specification of str_b64_decode so that it matches the
Andre Heinecke <aheinecke@intevation.de>
parents: 184
diff changeset
105 *
160
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
106 * @param [out] dst Pointer to the destination. Needs to be NULL
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
107 * @param [out] dst_size Size allocated for the destination.
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
108 * @param [in] src Pointer to the base64 encoded data.
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
109 * @param [in] src_size Size of the encoded data.
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
110 *
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
111 * @returns 0 on success a polarssl error or -1 otherwise
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
112 */
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
113 int str_base64_decode(char **dst, size_t *dst_size, char *src,
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
114 size_t src_size);
251
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
115
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
116 #ifdef WIN32
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
117
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
118 /** @brief convert a utf8 string to utf16 wchar
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
119 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
120 * @param[in] string utf8 string. Must be at least len characters long.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
121 * @param[in] len number of characters to be converted.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
122 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
123 * @returns pointer to a newly allocated wchar array. NULL on error.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
124 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
125 **/
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
126 wchar_t *utf8_to_wchar (const char *string, size_t len);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
127
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
128 /** @brief convert a utf16 string to utf8
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
129 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
130 * @param[in] string utf16 string. Must be at least len characters long.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
131 * @param[in] len number of characters to be converted.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
132 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
133 * @returns pointer to a newly allocated char array. NULL on error.
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
134 *
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
135 **/
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
136 char *wchar_to_utf8 (const wchar_t *string, size_t len);
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
137 #endif
c596568fa45b Add utf16 conversion functions for Windows.
Andre Heinecke <aheinecke@intevation.de>
parents: 239
diff changeset
138
184
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
139 #ifdef __cplusplus
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
140 }
1f44aae4528e Add C linkage for strhelp. Check for data in commontest.
Andre Heinecke <aheinecke@intevation.de>
parents: 160
diff changeset
141 #endif
160
bf4bfd8843bd Add memory allocating base64 decode function
Andre Heinecke <aheinecke@intevation.de>
parents: 133
diff changeset
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/