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1 | /* Description of GNU message catalog format: general file layout. |
2 | Copyright (C) 1995, 1997, 2000-2002 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU Library General Public License as published | |
6 | by the Free Software Foundation; either version 2, or (at your option) | |
7 | any later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
12 | Library General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU Library General Public | |
15 | License along with this program; if not, write to the Free Software | |
16 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, | |
17 | USA. */ | |
18 | ||
19 | #ifndef _GETTEXT_H | |
20 | #define _GETTEXT_H 1 | |
21 | ||
22 | #include <limits.h> | |
23 | ||
24 | /* @@ end of prolog @@ */ | |
25 | ||
26 | /* The magic number of the GNU message catalog format. */ | |
27 | #define _MAGIC 0x950412de | |
28 | #define _MAGIC_SWAPPED 0xde120495 | |
29 | ||
30 | /* Revision number of the currently used .mo (binary) file format. */ | |
31 | #define MO_REVISION_NUMBER 0 | |
32 | ||
33 | /* The following contortions are an attempt to use the C preprocessor | |
34 | to determine an unsigned integral type that is 32 bits wide. An | |
35 | alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but | |
36 | as of version autoconf-2.13, the AC_CHECK_SIZEOF macro doesn't work | |
37 | when cross-compiling. */ | |
38 | ||
39 | #if __STDC__ | |
40 | # define UINT_MAX_32_BITS 4294967295U | |
41 | #else | |
42 | # define UINT_MAX_32_BITS 0xFFFFFFFF | |
43 | #endif | |
44 | ||
45 | /* If UINT_MAX isn't defined, assume it's a 32-bit type. | |
46 | This should be valid for all systems GNU cares about because | |
47 | that doesn't include 16-bit systems, and only modern systems | |
48 | (that certainly have <limits.h>) have 64+-bit integral types. */ | |
49 | ||
50 | #ifndef UINT_MAX | |
51 | # define UINT_MAX UINT_MAX_32_BITS | |
52 | #endif | |
53 | ||
54 | #if UINT_MAX == UINT_MAX_32_BITS | |
55 | typedef unsigned nls_uint32; | |
56 | #else | |
57 | # if USHRT_MAX == UINT_MAX_32_BITS | |
58 | typedef unsigned short nls_uint32; | |
59 | # else | |
60 | # if ULONG_MAX == UINT_MAX_32_BITS | |
61 | typedef unsigned long nls_uint32; | |
62 | # else | |
63 | /* The following line is intended to throw an error. Using #error is | |
64 | not portable enough. */ | |
65 | "Cannot determine unsigned 32-bit data type." | |
66 | # endif | |
67 | # endif | |
68 | #endif | |
69 | ||
70 | ||
71 | /* Header for binary .mo file format. */ | |
72 | struct mo_file_header | |
73 | { | |
74 | /* The magic number. */ | |
75 | nls_uint32 magic; | |
76 | /* The revision number of the file format. */ | |
77 | nls_uint32 revision; | |
78 | ||
79 | /* The following are only used in .mo files with major revision 0. */ | |
80 | ||
81 | /* The number of strings pairs. */ | |
82 | nls_uint32 nstrings; | |
83 | /* Offset of table with start offsets of original strings. */ | |
84 | nls_uint32 orig_tab_offset; | |
85 | /* Offset of table with start offsets of translated strings. */ | |
86 | nls_uint32 trans_tab_offset; | |
87 | /* Size of hash table. */ | |
88 | nls_uint32 hash_tab_size; | |
89 | /* Offset of first hash table entry. */ | |
90 | nls_uint32 hash_tab_offset; | |
91 | ||
92 | /* The following are only used in .mo files with minor revision >= 1. */ | |
93 | ||
94 | /* The number of system dependent segments. */ | |
95 | nls_uint32 n_sysdep_segments; | |
96 | /* Offset of table describing system dependent segments. */ | |
97 | nls_uint32 sysdep_segments_offset; | |
98 | /* The number of system dependent strings pairs. */ | |
99 | nls_uint32 n_sysdep_strings; | |
100 | /* Offset of table with start offsets of original sysdep strings. */ | |
101 | nls_uint32 orig_sysdep_tab_offset; | |
102 | /* Offset of table with start offsets of translated sysdep strings. */ | |
103 | nls_uint32 trans_sysdep_tab_offset; | |
104 | }; | |
105 | ||
106 | /* Descriptor for static string contained in the binary .mo file. */ | |
107 | struct string_desc | |
108 | { | |
109 | /* Length of addressed string, not including the trailing NUL. */ | |
110 | nls_uint32 length; | |
111 | /* Offset of string in file. */ | |
112 | nls_uint32 offset; | |
113 | }; | |
114 | ||
115 | /* The following are only used in .mo files with minor revision >= 1. */ | |
116 | ||
117 | /* Descriptor for system dependent string segment. */ | |
118 | struct sysdep_segment | |
119 | { | |
120 | /* Length of addressed string, including the trailing NUL. */ | |
121 | nls_uint32 length; | |
122 | /* Offset of string in file. */ | |
123 | nls_uint32 offset; | |
124 | }; | |
125 | ||
126 | /* Descriptor for system dependent string. */ | |
127 | struct sysdep_string | |
128 | { | |
129 | /* Offset of static string segments in file. */ | |
130 | nls_uint32 offset; | |
131 | /* Alternating sequence of static and system dependent segments. | |
132 | The last segment is a static segment, including the trailing NUL. */ | |
133 | struct segment_pair | |
134 | { | |
135 | /* Size of static segment. */ | |
136 | nls_uint32 segsize; | |
137 | /* Reference to system dependent string segment, or ~0 at the end. */ | |
138 | nls_uint32 sysdepref; | |
139 | } segments[1]; | |
140 | }; | |
141 | ||
142 | /* Marker for the end of the segments[] array. This has the value 0xFFFFFFFF, | |
143 | regardless whether 'int' is 16 bit, 32 bit, or 64 bit. */ | |
144 | #define SEGMENTS_END ((nls_uint32) ~0) | |
145 | ||
146 | /* @@ begin of epilog @@ */ | |
147 | ||
148 | #endif /* gettext.h */ |