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71a94577 1/* Description of GNU message catalog format: general file layout.
6eb95e99 2 Copyright (C) 1995, 1997, 2000-2002 Free Software Foundation, Inc.
45f8428f 3
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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)
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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
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Library General Public License for more details.
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13
14 You should have received a copy of the GNU Library General Public
71a94577 15 License along with this program; if not, write to the Free Software
0e687cb4 16 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
71a94577 17 USA. */
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18
19#ifndef _GETTEXT_H
20#define _GETTEXT_H 1
21
6eb95e99 22#include <limits.h>
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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
71a94577 36 as of version autoconf-2.13, the AC_CHECK_SIZEOF macro doesn't work
6eb95e99 37 when cross-compiling. */
45f8428f 38
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39#if __STDC__
40# define UINT_MAX_32_BITS 4294967295U
41#else
42# define UINT_MAX_32_BITS 0xFFFFFFFF
43#endif
45f8428f 44
6eb95e99 45/* If UINT_MAX isn't defined, assume it's a 32-bit type.
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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
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50#ifndef UINT_MAX
51# define UINT_MAX UINT_MAX_32_BITS
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52#endif
53
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54#if UINT_MAX == UINT_MAX_32_BITS
55typedef unsigned nls_uint32;
45f8428f 56#else
6eb95e99 57# if USHRT_MAX == UINT_MAX_32_BITS
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58typedef unsigned short nls_uint32;
59# else
6eb95e99 60# if ULONG_MAX == UINT_MAX_32_BITS
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61typedef 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. */
72struct mo_file_header
73{
74 /* The magic number. */
75 nls_uint32 magic;
76 /* The revision number of the file format. */
77 nls_uint32 revision;
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78
79 /* The following are only used in .mo files with major revision 0. */
80
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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;
6eb95e99 85 /* Offset of table with start offsets of translated strings. */
45f8428f 86 nls_uint32 trans_tab_offset;
6eb95e99 87 /* Size of hash table. */
45f8428f 88 nls_uint32 hash_tab_size;
6eb95e99 89 /* Offset of first hash table entry. */
45f8428f 90 nls_uint32 hash_tab_offset;
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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;
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104};
105
6eb95e99 106/* Descriptor for static string contained in the binary .mo file. */
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107struct string_desc
108{
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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. */
118struct sysdep_segment
119{
120 /* Length of addressed string, including the trailing NUL. */
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121 nls_uint32 length;
122 /* Offset of string in file. */
123 nls_uint32 offset;
124};
125
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126/* Descriptor for system dependent string. */
127struct 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
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146/* @@ begin of epilog @@ */
147
148#endif /* gettext.h */