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434
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1 /* A substitute for ISO C99 <wchar.h>, for platforms that have issues.
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2
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3 Copyright (C) 2007-2010 Free Software Foundation, Inc.
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4
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5 This program is free software; you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3, or (at your option)
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8 any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program; if not, write to the Free Software Foundation,
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17 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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18
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19 /* Written by Eric Blake. */
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20
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21 /*
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22 * ISO C 99 <wchar.h> for platforms that have issues.
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23 * <http://www.opengroup.org/susv3xbd/wchar.h.html>
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24 *
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25 * For now, this just ensures proper prerequisite inclusion order and
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26 * the declaration of wcwidth().
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27 */
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28
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29 #if __GNUC__ >= 3
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30 @PRAGMA_SYSTEM_HEADER@
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31 #endif
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32
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33 #if defined __need_mbstate_t || (defined __hpux && ((defined _INTTYPES_INCLUDED && !defined strtoimax) || defined _GL_JUST_INCLUDE_SYSTEM_WCHAR_H)) || defined _GL_ALREADY_INCLUDING_WCHAR_H
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34 /* Special invocation convention:
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35 - Inside uClibc header files.
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36 - On HP-UX 11.00 we have a sequence of nested includes
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37 <wchar.h> -> <stdlib.h> -> <stdint.h>, and the latter includes <wchar.h>,
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38 once indirectly <stdint.h> -> <sys/types.h> -> <inttypes.h> -> <wchar.h>
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39 and once directly. In both situations 'wint_t' is not yet defined,
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40 therefore we cannot provide the function overrides; instead include only
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41 the system's <wchar.h>.
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42 - On IRIX 6.5, similarly, we have an include <wchar.h> -> <wctype.h>, and
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43 the latter includes <wchar.h>. But here, we have no way to detect whether
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44 <wctype.h> is completely included or is still being included. */
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45
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46 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
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47
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48 #else
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49 /* Normal invocation convention. */
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50
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51 #ifndef _GL_WCHAR_H
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52
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53 #define _GL_ALREADY_INCLUDING_WCHAR_H
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54
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55 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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56 <wchar.h>.
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57 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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58 included before <wchar.h>.
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59 But avoid namespace pollution on glibc systems. */
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60 #ifndef __GLIBC__
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61 # include <stddef.h>
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62 # include <stdio.h>
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63 # include <time.h>
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64 #endif
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65
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66 /* Include the original <wchar.h> if it exists.
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67 Some builds of uClibc lack it. */
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68 /* The include_next requires a split double-inclusion guard. */
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69 #if @HAVE_WCHAR_H@
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70 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
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71 #endif
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72
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73 #undef _GL_ALREADY_INCLUDING_WCHAR_H
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74
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75 #ifndef _GL_WCHAR_H
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76 #define _GL_WCHAR_H
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77
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78 /* The definition of GL_LINK_WARNING is copied here. */
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79
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80 /* The definition of _GL_ARG_NONNULL is copied here. */
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81
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82 #ifdef __cplusplus
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83 extern "C" {
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84 #endif
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85
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86
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87 /* Define wint_t. (Also done in wctype.in.h.) */
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88 #if !@HAVE_WINT_T@ && !defined wint_t
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89 # define wint_t int
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90 # ifndef WEOF
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91 # define WEOF -1
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92 # endif
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93 #endif
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94
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95
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96 /* Override mbstate_t if it is too small.
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97 On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
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98 implementing mbrtowc for encodings like UTF-8. */
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99 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
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100 typedef int rpl_mbstate_t;
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101 # undef mbstate_t
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102 # define mbstate_t rpl_mbstate_t
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103 # define GNULIB_defined_mbstate_t 1
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104 #endif
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105
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106
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107 /* Convert a single-byte character to a wide character. */
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108 #if @GNULIB_BTOWC@
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109 # if @REPLACE_BTOWC@
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110 # undef btowc
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111 # define btowc rpl_btowc
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112 # endif
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113 # if !@HAVE_BTOWC@ || @REPLACE_BTOWC@
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114 extern wint_t btowc (int c);
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115 # endif
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116 #elif defined GNULIB_POSIXCHECK
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117 # undef btowc
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118 # define btowc(c) \
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119 (GL_LINK_WARNING ("btowc is unportable - " \
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120 "use gnulib module btowc for portability"), \
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121 btowc (c))
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122 #endif
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123
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124
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125 /* Convert a wide character to a single-byte character. */
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126 #if @GNULIB_WCTOB@
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127 # if @REPLACE_WCTOB@
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128 # undef wctob
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129 # define wctob rpl_wctob
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130 # endif
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131 # if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
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132 /* wctob is provided by gnulib, or wctob exists but is not declared. */
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133 extern int wctob (wint_t wc);
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134 # endif
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135 #elif defined GNULIB_POSIXCHECK
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136 # undef wctob
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137 # define wctob(w) \
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138 (GL_LINK_WARNING ("wctob is unportable - " \
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139 "use gnulib module wctob for portability"), \
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140 wctob (w))
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141 #endif
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142
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143
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144 /* Test whether *PS is in the initial state. */
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145 #if @GNULIB_MBSINIT@
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146 # if @REPLACE_MBSINIT@
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147 # undef mbsinit
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148 # define mbsinit rpl_mbsinit
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149 # endif
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150 # if !@HAVE_MBSINIT@ || @REPLACE_MBSINIT@
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151 extern int mbsinit (const mbstate_t *ps);
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152 # endif
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153 #elif defined GNULIB_POSIXCHECK
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154 # undef mbsinit
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155 # define mbsinit(p) \
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156 (GL_LINK_WARNING ("mbsinit is unportable - " \
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157 "use gnulib module mbsinit for portability"), \
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158 mbsinit (p))
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159 #endif
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160
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161
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162 /* Convert a multibyte character to a wide character. */
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163 #if @GNULIB_MBRTOWC@
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164 # if @REPLACE_MBRTOWC@
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165 # undef mbrtowc
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166 # define mbrtowc rpl_mbrtowc
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167 # endif
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168 # if !@HAVE_MBRTOWC@ || @REPLACE_MBRTOWC@
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169 extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
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170 # endif
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171 #elif defined GNULIB_POSIXCHECK
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172 # undef mbrtowc
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173 # define mbrtowc(w,s,n,p) \
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174 (GL_LINK_WARNING ("mbrtowc is unportable - " \
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175 "use gnulib module mbrtowc for portability"), \
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176 mbrtowc (w, s, n, p))
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177 #endif
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178
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179
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180 /* Recognize a multibyte character. */
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181 #if @GNULIB_MBRLEN@
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182 # if @REPLACE_MBRLEN@
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183 # undef mbrlen
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184 # define mbrlen rpl_mbrlen
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185 # endif
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186 # if !@HAVE_MBRLEN@ || @REPLACE_MBRLEN@
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187 extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
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188 # endif
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189 #elif defined GNULIB_POSIXCHECK
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190 # undef mbrlen
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191 # define mbrlen(s,n,p) \
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192 (GL_LINK_WARNING ("mbrlen is unportable - " \
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193 "use gnulib module mbrlen for portability"), \
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194 mbrlen (s, n, p))
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195 #endif
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196
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197
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198 /* Convert a string to a wide string. */
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199 #if @GNULIB_MBSRTOWCS@
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200 # if @REPLACE_MBSRTOWCS@
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201 # undef mbsrtowcs
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202 # define mbsrtowcs rpl_mbsrtowcs
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203 # endif
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204 # if !@HAVE_MBSRTOWCS@ || @REPLACE_MBSRTOWCS@
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205 extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps)
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206 _GL_ARG_NONNULL ((2));
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207 # endif
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208 #elif defined GNULIB_POSIXCHECK
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209 # undef mbsrtowcs
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210 # define mbsrtowcs(d,s,l,p) \
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211 (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
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212 "use gnulib module mbsrtowcs for portability"), \
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213 mbsrtowcs (d, s, l, p))
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214 #endif
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215
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216
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217 /* Convert a string to a wide string. */
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218 #if @GNULIB_MBSNRTOWCS@
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219 # if @REPLACE_MBSNRTOWCS@
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220 # undef mbsnrtowcs
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221 # define mbsnrtowcs rpl_mbsnrtowcs
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222 # endif
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223 # if !@HAVE_MBSNRTOWCS@ || @REPLACE_MBSNRTOWCS@
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224 extern size_t mbsnrtowcs (wchar_t *dest, const char **srcp, size_t srclen, size_t len, mbstate_t *ps)
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225 _GL_ARG_NONNULL ((2));
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226 # endif
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227 #elif defined GNULIB_POSIXCHECK
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228 # undef mbsnrtowcs
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229 # define mbsnrtowcs(d,s,n,l,p) \
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230 (GL_LINK_WARNING ("mbsnrtowcs is unportable - " \
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231 "use gnulib module mbsnrtowcs for portability"), \
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232 mbsnrtowcs (d, s, n, l, p))
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233 #endif
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234
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235
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236 /* Convert a wide character to a multibyte character. */
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237 #if @GNULIB_WCRTOMB@
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238 # if @REPLACE_WCRTOMB@
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239 # undef wcrtomb
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240 # define wcrtomb rpl_wcrtomb
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241 # endif
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242 # if !@HAVE_WCRTOMB@ || @REPLACE_WCRTOMB@
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243 extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
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244 # endif
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245 #elif defined GNULIB_POSIXCHECK
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246 # undef wcrtomb
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247 # define wcrtomb(s,w,p) \
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248 (GL_LINK_WARNING ("wcrtomb is unportable - " \
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249 "use gnulib module wcrtomb for portability"), \
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250 wcrtomb (s, w, p))
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251 #endif
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252
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253
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254 /* Convert a wide string to a string. */
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255 #if @GNULIB_WCSRTOMBS@
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256 # if @REPLACE_WCSRTOMBS@
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257 # undef wcsrtombs
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258 # define wcsrtombs rpl_wcsrtombs
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259 # endif
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260 # if !@HAVE_WCSRTOMBS@ || @REPLACE_WCSRTOMBS@
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261 extern size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps)
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262 _GL_ARG_NONNULL ((2));
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263 # endif
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264 #elif defined GNULIB_POSIXCHECK
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265 # undef wcsrtombs
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266 # define wcsrtombs(d,s,l,p) \
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267 (GL_LINK_WARNING ("wcsrtombs is unportable - " \
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268 "use gnulib module wcsrtombs for portability"), \
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269 wcsrtombs (d, s, l, p))
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270 #endif
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271
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272
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273 /* Convert a wide string to a string. */
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274 #if @GNULIB_WCSNRTOMBS@
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275 # if @REPLACE_WCSNRTOMBS@
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276 # undef wcsnrtombs
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277 # define wcsnrtombs rpl_wcsnrtombs
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278 # endif
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279 # if !@HAVE_WCSNRTOMBS@ || @REPLACE_WCSNRTOMBS@
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280 extern size_t wcsnrtombs (char *dest, const wchar_t **srcp, size_t srclen, size_t len, mbstate_t *ps)
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281 _GL_ARG_NONNULL ((2));
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282 # endif
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283 #elif defined GNULIB_POSIXCHECK
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284 # undef wcsnrtombs
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285 # define wcsnrtombs(d,s,n,l,p) \
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286 (GL_LINK_WARNING ("wcsnrtombs is unportable - " \
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287 "use gnulib module wcsnrtombs for portability"), \
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288 wcsnrtombs (d, s, n, l, p))
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289 #endif
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290
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291
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292 /* Return the number of screen columns needed for WC. */
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293 #if @GNULIB_WCWIDTH@
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294 # if @REPLACE_WCWIDTH@
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295 # undef wcwidth
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296 # define wcwidth rpl_wcwidth
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297 extern int wcwidth (wchar_t);
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298 # else
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299 # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
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300 /* wcwidth exists but is not declared. */
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301 extern int wcwidth (int /* actually wchar_t */);
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302 # endif
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303 # endif
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304 #elif defined GNULIB_POSIXCHECK
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305 # undef wcwidth
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306 # define wcwidth(w) \
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307 (GL_LINK_WARNING ("wcwidth is unportable - " \
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308 "use gnulib module wcwidth for portability"), \
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309 wcwidth (w))
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310 #endif
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311
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312
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313 #ifdef __cplusplus
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314 }
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315 #endif
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316
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317 #endif /* _GL_WCHAR_H */
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318 #endif /* _GL_WCHAR_H */
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319 #endif
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