intl/gmo.h

   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., 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
  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  */