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