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1 /* Description of GNU message catalog format: general file layout.
2    Copyright (C) 1995, 1997, 2000-2002, 2004 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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 #define MO_REVISION_NUMBER_WITH_SYSDEP_I 1
33 
34 /* The following contortions are an attempt to use the C preprocessor
35    to determine an unsigned integral type that is 32 bits wide.  An
36    alternative approach is to use autoconf's AC_CHECK_SIZEOF macro, but
37    as of version autoconf-2.13, the AC_CHECK_SIZEOF macro doesn't work
38    when cross-compiling.  */
39 
40 #if __STDC__
41 # define UINT_MAX_32_BITS 4294967295U
42 #else
43 # define UINT_MAX_32_BITS 0xFFFFFFFF
44 #endif
45 
46 /* If UINT_MAX isn't defined, assume it's a 32-bit type.
47    This should be valid for all systems GNU cares about because
48    that doesn't include 16-bit systems, and only modern systems
49    (that certainly have <limits.h>) have 64+-bit integral types.  */
50 
51 #ifndef UINT_MAX
52 # define UINT_MAX UINT_MAX_32_BITS
53 #endif
54 
55 #if UINT_MAX == UINT_MAX_32_BITS
56 typedef unsigned nls_uint32;
57 #else
58 # if USHRT_MAX == UINT_MAX_32_BITS
59 typedef unsigned short nls_uint32;
60 # else
61 #  if ULONG_MAX == UINT_MAX_32_BITS
62 typedef unsigned long nls_uint32;
63 #  else
64   /* The following line is intended to throw an error.  Using #error is
65      not portable enough.  */
66   "Cannot determine unsigned 32-bit data type."
67 #  endif
68 # endif
69 #endif
70 
71 
72 /* Header for binary .mo file format.  */
73 struct mo_file_header
74 {
75   /* The magic number.  */
76   nls_uint32 magic;
77   /* The revision number of the file format.  */
78   nls_uint32 revision;
79 
80   /* The following are only used in .mo files with major revision 0 or 1.  */
81 
82   /* The number of strings pairs.  */
83   nls_uint32 nstrings;
84   /* Offset of table with start offsets of original strings.  */
85   nls_uint32 orig_tab_offset;
86   /* Offset of table with start offsets of translated strings.  */
87   nls_uint32 trans_tab_offset;
88   /* Size of hash table.  */
89   nls_uint32 hash_tab_size;
90   /* Offset of first hash table entry.  */
91   nls_uint32 hash_tab_offset;
92 
93   /* The following are only used in .mo files with minor revision >= 1.  */
94 
95   /* The number of system dependent segments.  */
96   nls_uint32 n_sysdep_segments;
97   /* Offset of table describing system dependent segments.  */
98   nls_uint32 sysdep_segments_offset;
99   /* The number of system dependent strings pairs.  */
100   nls_uint32 n_sysdep_strings;
101   /* Offset of table with start offsets of original sysdep strings.  */
102   nls_uint32 orig_sysdep_tab_offset;
103   /* Offset of table with start offsets of translated sysdep strings.  */
104   nls_uint32 trans_sysdep_tab_offset;
105 };
106 
107 /* Descriptor for static string contained in the binary .mo file.  */
108 struct string_desc
109 {
110   /* Length of addressed string, not including the trailing NUL.  */
111   nls_uint32 length;
112   /* Offset of string in file.  */
113   nls_uint32 offset;
114 };
115 
116 /* The following are only used in .mo files with minor revision >= 1.  */
117 
118 /* Descriptor for system dependent string segment.  */
119 struct sysdep_segment
120 {
121   /* Length of addressed string, including the trailing NUL.  */
122   nls_uint32 length;
123   /* Offset of string in file.  */
124   nls_uint32 offset;
125 };
126 
127 /* Descriptor for system dependent string.  */
128 struct sysdep_string
129 {
130   /* Offset of static string segments in file.  */
131   nls_uint32 offset;
132   /* Alternating sequence of static and system dependent segments.
133      The last segment is a static segment, including the trailing NUL.  */
134   struct segment_pair
135   {
136     /* Size of static segment.  */
137     nls_uint32 segsize;
138     /* Reference to system dependent string segment, or ~0 at the end.  */
139     nls_uint32 sysdepref;
140   } segments[1];
141 };
142 
143 /* Marker for the end of the segments[] array.  This has the value 0xFFFFFFFF,
144    regardless whether 'int' is 16 bit, 32 bit, or 64 bit.  */
145 #define SEGMENTS_END ((nls_uint32) ~0)
146 
147 /* @@ begin of epilog @@ */
148 
149 #endif	/* gettext.h  */
150