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283
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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) 2007-2008 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 #ifdef __need_mbstate_t
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34 /* Special invocation convention inside uClibc header files. */
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35
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36 #@INCLUDE_NEXT@ @NEXT_WCHAR_H@
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37
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38 #else
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39 /* Normal invocation convention. */
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40
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41 #ifndef _GL_WCHAR_H
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42
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43 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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44 <wchar.h>.
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45 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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46 included before <wchar.h>. */
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47 #include <stddef.h>
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48 #include <stdio.h>
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49 #include <time.h>
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50
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51 /* Include the original <wchar.h> if it exists.
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52 Some builds of uClibc lack it. */
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53 /* The include_next requires a split double-inclusion guard. */
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54 #if @HAVE_WCHAR_H@
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55 # @INCLUDE_NEXT@ @NEXT_WCHAR_H@
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56 #endif
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57
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58 #ifndef _GL_WCHAR_H
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59 #define _GL_WCHAR_H
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60
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61 /* The definition of GL_LINK_WARNING is copied here. */
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62
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63 #ifdef __cplusplus
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64 extern "C" {
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65 #endif
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66
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67
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68 /* Define wint_t. (Also done in wctype.in.h.) */
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69 #if !@HAVE_WINT_T@ && !defined wint_t
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70 # define wint_t int
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71 # ifndef WEOF
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72 # define WEOF -1
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73 # endif
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74 #endif
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75
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76
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77 /* Override mbstate_t if it is too small.
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78 On IRIX 6.5, sizeof (mbstate_t) == 1, which is not sufficient for
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79 implementing mbrtowc for encodings like UTF-8. */
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80 #if !(@HAVE_MBSINIT@ && @HAVE_MBRTOWC@) || @REPLACE_MBSTATE_T@
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81 typedef int rpl_mbstate_t;
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82 # undef mbstate_t
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83 # define mbstate_t rpl_mbstate_t
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84 # define GNULIB_defined_mbstate_t 1
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85 #endif
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86
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87
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88 /* Convert a single-byte character to a wide character. */
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89 #if @GNULIB_BTOWC@
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90 # if @REPLACE_BTOWC@
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91 # undef btowc
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92 # define btowc rpl_btowc
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93 # endif
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94 # if !@HAVE_BTOWC@ || @REPLACE_BTOWC@
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95 extern wint_t btowc (int c);
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96 # endif
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97 #elif defined GNULIB_POSIXCHECK
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98 # undef btowc
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99 # define btowc(c) \
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100 (GL_LINK_WARNING ("btowc is unportable - " \
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101 "use gnulib module btowc for portability"), \
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102 btowc (c))
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103 #endif
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104
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105
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106 /* Convert a wide character to a single-byte character. */
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107 #if @GNULIB_WCTOB@
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108 # if @REPLACE_WCTOB@
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109 # undef wctob
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110 # define wctob rpl_wctob
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111 # endif
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112 # if (!defined wctob && !@HAVE_DECL_WCTOB@) || @REPLACE_WCTOB@
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113 /* wctob is provided by gnulib, or wctob exists but is not declared. */
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114 extern int wctob (wint_t wc);
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115 # endif
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116 #elif defined GNULIB_POSIXCHECK
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117 # undef wctob
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118 # define wctob(w) \
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119 (GL_LINK_WARNING ("wctob is unportable - " \
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120 "use gnulib module wctob for portability"), \
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121 wctob (w))
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122 #endif
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123
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124
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125 /* Test whether *PS is in the initial state. */
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126 #if @GNULIB_MBSINIT@
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127 # if @REPLACE_MBSINIT@
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128 # undef mbsinit
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129 # define mbsinit rpl_mbsinit
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130 # endif
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131 # if !@HAVE_MBSINIT@ || @REPLACE_MBSINIT@
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132 extern int mbsinit (const mbstate_t *ps);
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133 # endif
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134 #elif defined GNULIB_POSIXCHECK
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135 # undef mbsinit
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136 # define mbsinit(p) \
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137 (GL_LINK_WARNING ("mbsinit is unportable - " \
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138 "use gnulib module mbsinit for portability"), \
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139 mbsinit (p))
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140 #endif
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141
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142
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143 /* Convert a multibyte character to a wide character. */
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144 #if @GNULIB_MBRTOWC@
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145 # if @REPLACE_MBRTOWC@
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146 # undef mbrtowc
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147 # define mbrtowc rpl_mbrtowc
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148 # endif
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149 # if !@HAVE_MBRTOWC@ || @REPLACE_MBRTOWC@
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150 extern size_t mbrtowc (wchar_t *pwc, const char *s, size_t n, mbstate_t *ps);
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151 # endif
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152 #elif defined GNULIB_POSIXCHECK
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153 # undef mbrtowc
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154 # define mbrtowc(w,s,n,p) \
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155 (GL_LINK_WARNING ("mbrtowc is unportable - " \
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156 "use gnulib module mbrtowc for portability"), \
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157 mbrtowc (w, s, n, p))
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158 #endif
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159
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160
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161 /* Recognize a multibyte character. */
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162 #if @GNULIB_MBRLEN@
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163 # if @REPLACE_MBRLEN@
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164 # undef mbrlen
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165 # define mbrlen rpl_mbrlen
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166 # endif
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167 # if !@HAVE_MBRLEN@ || @REPLACE_MBRLEN@
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168 extern size_t mbrlen (const char *s, size_t n, mbstate_t *ps);
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169 # endif
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170 #elif defined GNULIB_POSIXCHECK
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171 # undef mbrlen
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172 # define mbrlen(s,n,p) \
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173 (GL_LINK_WARNING ("mbrlen is unportable - " \
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174 "use gnulib module mbrlen for portability"), \
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175 mbrlen (s, n, p))
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176 #endif
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177
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178
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179 /* Convert a string to a wide string. */
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180 #if @GNULIB_MBSRTOWCS@
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181 # if @REPLACE_MBSRTOWCS@
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182 # undef mbsrtowcs
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183 # define mbsrtowcs rpl_mbsrtowcs
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184 # endif
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185 # if !@HAVE_MBSRTOWCS@ || @REPLACE_MBSRTOWCS@
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186 extern size_t mbsrtowcs (wchar_t *dest, const char **srcp, size_t len, mbstate_t *ps);
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187 # endif
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188 #elif defined GNULIB_POSIXCHECK
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189 # undef mbsrtowcs
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190 # define mbsrtowcs(d,s,l,p) \
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191 (GL_LINK_WARNING ("mbsrtowcs is unportable - " \
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192 "use gnulib module mbsrtowcs for portability"), \
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193 mbsrtowcs (d, s, l, p))
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194 #endif
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195
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196
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197 /* Convert a string to a wide string. */
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198 #if @GNULIB_MBSNRTOWCS@
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199 # if @REPLACE_MBSNRTOWCS@
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200 # undef mbsnrtowcs
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201 # define mbsnrtowcs rpl_mbsnrtowcs
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202 # endif
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203 # if !@HAVE_MBSNRTOWCS@ || @REPLACE_MBSNRTOWCS@
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204 extern size_t mbsnrtowcs (wchar_t *dest, const char **srcp, size_t srclen, size_t len, mbstate_t *ps);
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205 # endif
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206 #elif defined GNULIB_POSIXCHECK
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207 # undef mbsnrtowcs
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208 # define mbsnrtowcs(d,s,n,l,p) \
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209 (GL_LINK_WARNING ("mbsnrtowcs is unportable - " \
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210 "use gnulib module mbsnrtowcs for portability"), \
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211 mbsnrtowcs (d, s, n, l, p))
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212 #endif
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213
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214
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215 /* Convert a wide character to a multibyte character. */
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216 #if @GNULIB_WCRTOMB@
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217 # if @REPLACE_WCRTOMB@
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218 # undef wcrtomb
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219 # define wcrtomb rpl_wcrtomb
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220 # endif
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221 # if !@HAVE_WCRTOMB@ || @REPLACE_WCRTOMB@
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222 extern size_t wcrtomb (char *s, wchar_t wc, mbstate_t *ps);
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223 # endif
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224 #elif defined GNULIB_POSIXCHECK
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225 # undef wcrtomb
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226 # define wcrtomb(s,w,p) \
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227 (GL_LINK_WARNING ("wcrtomb is unportable - " \
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228 "use gnulib module wcrtomb for portability"), \
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229 wcrtomb (s, w, p))
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230 #endif
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231
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232
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233 /* Convert a wide string to a string. */
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234 #if @GNULIB_WCSRTOMBS@
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235 # if @REPLACE_WCSRTOMBS@
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236 # undef wcsrtombs
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237 # define wcsrtombs rpl_wcsrtombs
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238 # endif
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239 # if !@HAVE_WCSRTOMBS@ || @REPLACE_WCSRTOMBS@
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240 extern size_t wcsrtombs (char *dest, const wchar_t **srcp, size_t len, mbstate_t *ps);
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241 # endif
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242 #elif defined GNULIB_POSIXCHECK
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243 # undef wcsrtombs
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244 # define wcsrtombs(d,s,l,p) \
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245 (GL_LINK_WARNING ("wcsrtombs is unportable - " \
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246 "use gnulib module wcsrtombs for portability"), \
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247 wcsrtombs (d, s, l, p))
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248 #endif
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249
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250
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251 /* Convert a wide string to a string. */
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252 #if @GNULIB_WCSNRTOMBS@
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253 # if !@HAVE_WCSNRTOMBS@
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254 extern size_t wcsnrtombs (char *dest, const wchar_t **srcp, size_t srclen, size_t len, mbstate_t *ps);
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255 # endif
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256 #elif defined GNULIB_POSIXCHECK
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257 # undef wcsnrtombs
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258 # define wcsnrtombs(d,s,n,l,p) \
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259 (GL_LINK_WARNING ("wcsnrtombs is unportable - " \
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260 "use gnulib module wcsnrtombs for portability"), \
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261 wcsnrtombs (d, s, n, l, p))
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262 #endif
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263
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264
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265 /* Return the number of screen columns needed for WC. */
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266 #if @GNULIB_WCWIDTH@
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267 # if @REPLACE_WCWIDTH@
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268 # undef wcwidth
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269 # define wcwidth rpl_wcwidth
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270 extern int wcwidth (wchar_t);
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271 # else
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272 # if !defined wcwidth && !@HAVE_DECL_WCWIDTH@
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273 /* wcwidth exists but is not declared. */
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274 extern int wcwidth (int /* actually wchar_t */);
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275 # endif
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276 # endif
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277 #elif defined GNULIB_POSIXCHECK
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278 # undef wcwidth
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279 # define wcwidth(w) \
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280 (GL_LINK_WARNING ("wcwidth is unportable - " \
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281 "use gnulib module wcwidth for portability"), \
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282 wcwidth (w))
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283 #endif
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284
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285
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286 #ifdef __cplusplus
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287 }
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288 #endif
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289
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290 #endif /* _GL_WCHAR_H */
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291 #endif /* _GL_WCHAR_H */
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292 #endif
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