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author jpayne
date Tue, 18 Mar 2025 17:55:14 -0400
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1 /* Public API for GNU gettext PO files - contained in libgettextpo.
2 Copyright (C) 2003-2008, 2010, 2012-2016, 2019-2024 Free Software Foundation, Inc.
3 Written by Bruno Haible <bruno@clisp.org>, 2003.
4
5 This program is free software: you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
17
18 #ifndef _GETTEXT_PO_H
19 #define _GETTEXT_PO_H 1
20
21 #include <stdlib.h>
22
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26
27
28 /* =========================== Meta Information ============================ */
29
30 /* Version number: (major<<16) + (minor<<8) + subminor */
31 #define LIBGETTEXTPO_VERSION 0x001605
32 extern int libgettextpo_version;
33
34 /* ================================= Types ================================= */
35
36 /* A po_file_t represents the contents of a PO file. */
37 typedef struct po_file *po_file_t;
38
39 /* A po_message_iterator_t represents an iterator through a domain of a
40 PO file. */
41 typedef struct po_message_iterator *po_message_iterator_t;
42
43 /* A po_message_t represents a message in a PO file. */
44 typedef struct po_message *po_message_t;
45
46 /* A po_filepos_t represents a string's position within a source file. */
47 typedef struct po_filepos *po_filepos_t;
48
49 /* A po_error_handler handles error situations. */
50 struct po_error_handler
51 {
52 /* Signal an error. The error message is built from FORMAT and the following
53 arguments. ERRNUM, if nonzero, is an errno value.
54 Must increment the error_message_count variable declared in error.h.
55 Must not return if STATUS is nonzero. */
56 void (*error) (int status, int errnum,
57 const char *format, ...)
58 #if ((__GNUC__ == 3 && __GNUC_MINOR__ >= 1) || __GNUC__ > 3) && !__STRICT_ANSI__
59 __attribute__ ((__format__ (__printf__, 3, 4)))
60 #endif
61 ;
62
63 /* Signal an error. The error message is built from FORMAT and the following
64 arguments. The error location is at FILENAME line LINENO. ERRNUM, if
65 nonzero, is an errno value.
66 Must increment the error_message_count variable declared in error.h.
67 Must not return if STATUS is nonzero. */
68 void (*error_at_line) (int status, int errnum,
69 const char *filename, unsigned int lineno,
70 const char *format, ...)
71 #if ((__GNUC__ == 3 && __GNUC_MINOR__ >= 1) || __GNUC__ > 3) && !__STRICT_ANSI__
72 __attribute__ ((__format__ (__printf__, 5, 6)))
73 #endif
74 ;
75
76 /* Signal a multiline warning. The PREFIX applies to all lines of the
77 MESSAGE. Free the PREFIX and MESSAGE when done. */
78 void (*multiline_warning) (char *prefix, char *message);
79
80 /* Signal a multiline error. The PREFIX applies to all lines of the
81 MESSAGE. Free the PREFIX and MESSAGE when done.
82 Must increment the error_message_count variable declared in error.h if
83 PREFIX is non-NULL. */
84 void (*multiline_error) (char *prefix, char *message);
85 };
86 typedef const struct po_error_handler *po_error_handler_t;
87
88 /* A po_xerror_handler handles warnings, error and fatal error situations. */
89 #define PO_SEVERITY_WARNING 0 /* just a warning, tell the user */
90 #define PO_SEVERITY_ERROR 1 /* an error, the operation cannot complete */
91 #define PO_SEVERITY_FATAL_ERROR 2 /* an error, the operation must be aborted */
92 struct po_xerror_handler
93 {
94 /* Signal a problem of the given severity.
95 MESSAGE and/or FILENAME + LINENO indicate where the problem occurred.
96 If FILENAME is NULL, FILENAME and LINENO and COLUMN should be ignored.
97 If LINENO is (size_t)(-1), LINENO and COLUMN should be ignored.
98 If COLUMN is (size_t)(-1), it should be ignored.
99 MESSAGE_TEXT is the problem description (if MULTILINE_P is true,
100 multiple lines of text, each terminated with a newline, otherwise
101 usually a single line).
102 Must not return if SEVERITY is PO_SEVERITY_FATAL_ERROR. */
103 void (*xerror) (int severity,
104 po_message_t message,
105 const char *filename, size_t lineno, size_t column,
106 int multiline_p, const char *message_text);
107 /* Signal a problem that refers to two messages.
108 Similar to two calls to xerror.
109 If possible, a "..." can be appended to MESSAGE_TEXT1 and prepended to
110 MESSAGE_TEXT2. */
111 void (*xerror2) (int severity,
112 po_message_t message1,
113 const char *filename1, size_t lineno1, size_t column1,
114 int multiline_p1, const char *message_text1,
115 po_message_t message2,
116 const char *filename2, size_t lineno2, size_t column2,
117 int multiline_p2, const char *message_text2);
118 };
119 typedef const struct po_xerror_handler *po_xerror_handler_t;
120
121 /* Memory allocation:
122 The memory allocations performed by these functions use xmalloc(),
123 therefore will cause a program exit if memory is exhausted.
124 The memory allocated by po_file_read, and implicitly returned through
125 the po_message_* functions, lasts until freed with po_file_free. */
126
127
128 /* ============================= po_file_t API ============================= */
129
130 /* Create an empty PO file representation in memory. */
131 extern po_file_t po_file_create (void);
132
133 /* Read a PO file into memory.
134 Return its contents. Upon failure, call function from handler. */
135 #define po_file_read po_file_read_v3
136 extern po_file_t po_file_read (const char *filename,
137 po_xerror_handler_t handler);
138
139 /* Write an in-memory PO file to a file.
140 Upon failure, call function from handler. */
141 #define po_file_write po_file_write_v2
142 extern po_file_t po_file_write (po_file_t file, const char *filename,
143 po_xerror_handler_t handler);
144
145 /* Free a PO file from memory. */
146 extern void po_file_free (po_file_t file);
147
148 /* Return the names of the domains covered by a PO file in memory. */
149 extern const char * const * po_file_domains (po_file_t file);
150
151
152 /* =========================== Header entry API ============================ */
153
154 /* Return the header entry of a domain of a PO file in memory.
155 The domain NULL denotes the default domain.
156 Return NULL if there is no header entry. */
157 extern const char * po_file_domain_header (po_file_t file, const char *domain);
158
159 /* Return the value of a field in a header entry.
160 The return value is either a freshly allocated string, to be freed by the
161 caller, or NULL. */
162 extern char * po_header_field (const char *header, const char *field);
163
164 /* Return the header entry with a given field set to a given value. The field
165 is added if necessary.
166 The return value is a freshly allocated string. */
167 extern char * po_header_set_field (const char *header, const char *field, const char *value);
168
169
170 /* ======================= po_message_iterator_t API ======================= */
171
172 /* Create an iterator for traversing a domain of a PO file in memory.
173 The domain NULL denotes the default domain. */
174 extern po_message_iterator_t po_message_iterator (po_file_t file, const char *domain);
175
176 /* Free an iterator. */
177 extern void po_message_iterator_free (po_message_iterator_t iterator);
178
179 /* Return the next message, and advance the iterator.
180 Return NULL at the end of the message list. */
181 extern po_message_t po_next_message (po_message_iterator_t iterator);
182
183 /* Insert a message in a PO file in memory, in the domain and at the position
184 indicated by the iterator. The iterator thereby advances past the freshly
185 inserted message. */
186 extern void po_message_insert (po_message_iterator_t iterator, po_message_t message);
187
188
189 /* =========================== po_message_t API ============================ */
190
191 /* Return a freshly constructed message.
192 To finish initializing the message, you must set the msgid and msgstr. */
193 extern po_message_t po_message_create (void);
194
195 /* Return the context of a message, or NULL for a message not restricted to a
196 context. */
197 extern const char * po_message_msgctxt (po_message_t message);
198
199 /* Change the context of a message. NULL means a message not restricted to a
200 context. */
201 extern void po_message_set_msgctxt (po_message_t message, const char *msgctxt);
202
203 /* Return the msgid (untranslated English string) of a message. */
204 extern const char * po_message_msgid (po_message_t message);
205
206 /* Change the msgid (untranslated English string) of a message. */
207 extern void po_message_set_msgid (po_message_t message, const char *msgid);
208
209 /* Return the msgid_plural (untranslated English plural string) of a message,
210 or NULL for a message without plural. */
211 extern const char * po_message_msgid_plural (po_message_t message);
212
213 /* Change the msgid_plural (untranslated English plural string) of a message.
214 NULL means a message without plural. */
215 extern void po_message_set_msgid_plural (po_message_t message, const char *msgid_plural);
216
217 /* Return the msgstr (translation) of a message.
218 Return the empty string for an untranslated message. */
219 extern const char * po_message_msgstr (po_message_t message);
220
221 /* Change the msgstr (translation) of a message.
222 Use an empty string to denote an untranslated message. */
223 extern void po_message_set_msgstr (po_message_t message, const char *msgstr);
224
225 /* Return the msgstr[index] for a message with plural handling, or
226 NULL when the index is out of range or for a message without plural. */
227 extern const char * po_message_msgstr_plural (po_message_t message, int index);
228
229 /* Change the msgstr[index] for a message with plural handling.
230 Use a NULL value at the end to reduce the number of plural forms. */
231 extern void po_message_set_msgstr_plural (po_message_t message, int index, const char *msgstr);
232
233 /* Return the comments for a message. */
234 extern const char * po_message_comments (po_message_t message);
235
236 /* Change the comments for a message.
237 comments should be a multiline string, ending in a newline, or empty. */
238 extern void po_message_set_comments (po_message_t message, const char *comments);
239
240 /* Return the extracted comments for a message. */
241 extern const char * po_message_extracted_comments (po_message_t message);
242
243 /* Change the extracted comments for a message.
244 comments should be a multiline string, ending in a newline, or empty. */
245 extern void po_message_set_extracted_comments (po_message_t message, const char *comments);
246
247 /* Return the i-th file position for a message, or NULL if i is out of
248 range. */
249 extern po_filepos_t po_message_filepos (po_message_t message, int i);
250
251 /* Remove the i-th file position from a message.
252 The indices of all following file positions for the message are decremented
253 by one. */
254 extern void po_message_remove_filepos (po_message_t message, int i);
255
256 /* Add a file position to a message, if it is not already present for the
257 message.
258 file is the file name.
259 start_line is the line number where the string starts, or (size_t)(-1) if no
260 line number is available. */
261 extern void po_message_add_filepos (po_message_t message, const char *file, size_t start_line);
262
263 /* Return the previous context of a message, or NULL for none. */
264 extern const char * po_message_prev_msgctxt (po_message_t message);
265
266 /* Change the previous context of a message. NULL is allowed. */
267 extern void po_message_set_prev_msgctxt (po_message_t message, const char *prev_msgctxt);
268
269 /* Return the previous msgid (untranslated English string) of a message, or
270 NULL for none. */
271 extern const char * po_message_prev_msgid (po_message_t message);
272
273 /* Change the previous msgid (untranslated English string) of a message.
274 NULL is allowed. */
275 extern void po_message_set_prev_msgid (po_message_t message, const char *prev_msgid);
276
277 /* Return the previous msgid_plural (untranslated English plural string) of a
278 message, or NULL for none. */
279 extern const char * po_message_prev_msgid_plural (po_message_t message);
280
281 /* Change the previous msgid_plural (untranslated English plural string) of a
282 message. NULL is allowed. */
283 extern void po_message_set_prev_msgid_plural (po_message_t message, const char *prev_msgid_plural);
284
285 /* Return true if the message is marked obsolete. */
286 extern int po_message_is_obsolete (po_message_t message);
287
288 /* Change the obsolete mark of a message. */
289 extern void po_message_set_obsolete (po_message_t message, int obsolete);
290
291 /* Return true if the message is marked fuzzy. */
292 extern int po_message_is_fuzzy (po_message_t message);
293
294 /* Change the fuzzy mark of a message. */
295 extern void po_message_set_fuzzy (po_message_t message, int fuzzy);
296
297 /* Return true if the message is marked as being a format string of the given
298 type (e.g. "c-format"). */
299 extern int po_message_is_format (po_message_t message, const char *format_type);
300
301 /* Change the format string mark for a given type of a message. */
302 extern void po_message_set_format (po_message_t message, const char *format_type, /*bool*/int value);
303
304 /* If a numeric range of a message is set, return true and store the minimum
305 and maximum value in *MINP and *MAXP. */
306 extern int po_message_is_range (po_message_t message, int *minp, int *maxp);
307
308 /* Change the numeric range of a message. MIN and MAX must be non-negative,
309 with MIN < MAX. Use MIN = MAX = -1 to remove the numeric range of a
310 message. */
311 extern void po_message_set_range (po_message_t message, int min, int max);
312
313
314 /* =========================== po_filepos_t API ============================ */
315
316 /* Return the file name. */
317 extern const char * po_filepos_file (po_filepos_t filepos);
318
319 /* Return the line number where the string starts, or (size_t)(-1) if no line
320 number is available. */
321 extern size_t po_filepos_start_line (po_filepos_t filepos);
322
323
324 /* ============================ Format type API ============================= */
325
326 /* Return a NULL terminated array of the supported format types. */
327 extern const char * const * po_format_list (void);
328
329 /* Return the pretty name associated with a format type.
330 For example, for "csharp-format", return "C#".
331 Return NULL if the argument is not a supported format type. */
332 extern const char * po_format_pretty_name (const char *format_type);
333
334
335 /* ============================= Checking API ============================== */
336
337 /* Test whether an entire file PO file is valid, like msgfmt does it.
338 If it is invalid, pass the reasons to the handler. */
339 extern void po_file_check_all (po_file_t file, po_xerror_handler_t handler);
340
341 /* Test a single message, to be inserted in a PO file in memory, like msgfmt
342 does it. If it is invalid, pass the reasons to the handler. The iterator
343 is not modified by this call; it only specifies the file and the domain. */
344 extern void po_message_check_all (po_message_t message, po_message_iterator_t iterator, po_xerror_handler_t handler);
345
346 /* Test whether the message translation is a valid format string if the message
347 is marked as being a format string. If it is invalid, pass the reasons to
348 the handler. */
349 #define po_message_check_format po_message_check_format_v2
350 extern void po_message_check_format (po_message_t message, po_xerror_handler_t handler);
351
352
353 #ifdef __cplusplus
354 }
355 #endif
356
357 #endif /* _GETTEXT_PO_H */