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annotate lib/wctype.in.h @ 10655:8668b19a7032

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Avoid gcc warnings because of #pragma GCC system_header on older gcc.
author Bruno Haible <bruno@clisp.org>
date Sat, 18 Oct 2008 02:43:18 +0200
parents 83d12e60b1e0
children 6183b030f375
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1 /* A substitute for ISO C99 <wctype.h>, for platforms that lack it.
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2
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3 Copyright (C) 2006-2008 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 2, 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 Bruno Haible and Paul Eggert. */
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20
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21 /*
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22 * ISO C 99 <wctype.h> for platforms that lack it.
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23 * <http://www.opengroup.org/susv3xbd/wctype.h.html>
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24 *
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25 * iswctype, towctrans, towlower, towupper, wctrans, wctype,
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26 * wctrans_t, and wctype_t are not yet implemented.
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27 */
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28
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29 #ifndef _GL_WCTYPE_H
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30
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31 #if __GNUC__ >= 3
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32 @PRAGMA_SYSTEM_HEADER@
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33 #endif
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34
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35 #if @HAVE_WINT_T@
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36 /* Solaris 2.5 has a bug: <wchar.h> must be included before <wctype.h>.
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37 Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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38 <wchar.h>.
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39 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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40 included before <wchar.h>. */
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41 # include <stddef.h>
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42 # include <stdio.h>
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43 # include <time.h>
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44 # include <wchar.h>
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45 #endif
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46
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47 /* Include the original <wctype.h> if it exists.
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48 BeOS 5 has the functions but no <wctype.h>. */
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49 /* The include_next requires a split double-inclusion guard. */
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50 #if @HAVE_WCTYPE_H@
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51 # @INCLUDE_NEXT@ @NEXT_WCTYPE_H@
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52 #endif
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53
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54 #ifndef _GL_WCTYPE_H
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55 #define _GL_WCTYPE_H
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56
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57 /* Define wint_t. (Also done in wchar.in.h.) */
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58 #if !@HAVE_WINT_T@ && !defined wint_t
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59 # define wint_t int
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60 #endif
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61
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62 /* FreeBSD 4.4 to 4.11 has <wctype.h> but lacks the functions.
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63 Linux libc5 has <wctype.h> and the functions but they are broken.
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64 Assume all 12 functions are implemented the same way, or not at all. */
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65 #if ! @HAVE_ISWCNTRL@ || @REPLACE_ISWCNTRL@
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66
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67 /* IRIX 5.3 has macros but no functions, its isw* macros refer to an
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68 undefined variable _ctmp_ and to <ctype.h> macros like _P, and they
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69 refer to system functions like _iswctype that are not in the
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70 standard C library. Rather than try to get ancient buggy
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71 implementations like this to work, just disable them. */
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72 # undef iswalnum
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73 # undef iswalpha
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74 # undef iswblank
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75 # undef iswcntrl
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76 # undef iswdigit
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77 # undef iswgraph
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78 # undef iswlower
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79 # undef iswprint
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80 # undef iswpunct
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81 # undef iswspace
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82 # undef iswupper
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83 # undef iswxdigit
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84
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85 /* Linux libc5 has <wctype.h> and the functions but they are broken. */
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86 # if @REPLACE_ISWCNTRL@
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87 # define iswalnum rpl_iswalnum
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88 # define iswalpha rpl_iswalpha
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89 # define iswblank rpl_iswblank
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90 # define iswcntrl rpl_iswcntrl
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91 # define iswdigit rpl_iswdigit
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92 # define iswgraph rpl_iswgraph
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93 # define iswlower rpl_iswlower
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94 # define iswprint rpl_iswprint
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95 # define iswpunct rpl_iswpunct
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96 # define iswspace rpl_iswspace
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97 # define iswupper rpl_iswupper
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98 # define iswxdigit rpl_iswxdigit
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99 # endif
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100
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101 static inline int
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102 iswalnum (wint_t wc)
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103 {
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104 return ((wc >= '0' && wc <= '9')
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105 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z'));
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106 }
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107
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108 static inline int
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109 iswalpha (wint_t wc)
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110 {
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111 return (wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z';
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112 }
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113
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114 static inline int
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115 iswblank (wint_t wc)
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116 {
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117 return wc == ' ' || wc == '\t';
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118 }
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119
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120 static inline int
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121 iswcntrl (wint_t wc)
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122 {
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123 return (wc & ~0x1f) == 0 || wc == 0x7f;
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124 }
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125
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126 static inline int
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127 iswdigit (wint_t wc)
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128 {
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129 return wc >= '0' && wc <= '9';
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130 }
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131
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132 static inline int
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133 iswgraph (wint_t wc)
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134 {
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135 return wc >= '!' && wc <= '~';
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136 }
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137
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138 static inline int
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139 iswlower (wint_t wc)
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140 {
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141 return wc >= 'a' && wc <= 'z';
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142 }
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143
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144 static inline int
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145 iswprint (wint_t wc)
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146 {
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147 return wc >= ' ' && wc <= '~';
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148 }
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149
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150 static inline int
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151 iswpunct (wint_t wc)
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152 {
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153 return (wc >= '!' && wc <= '~'
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154 && !((wc >= '0' && wc <= '9')
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155 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'Z')));
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156 }
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157
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158 static inline int
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159 iswspace (wint_t wc)
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160 {
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161 return (wc == ' ' || wc == '\t'
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162 || wc == '\n' || wc == '\v' || wc == '\f' || wc == '\r');
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163 }
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164
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165 static inline int
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166 iswupper (wint_t wc)
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167 {
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168 return wc >= 'A' && wc <= 'Z';
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169 }
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170
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171 static inline int
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172 iswxdigit (wint_t wc)
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173 {
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174 return ((wc >= '0' && wc <= '9')
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175 || ((wc & ~0x20) >= 'A' && (wc & ~0x20) <= 'F'));
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176 }
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177
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178 # endif /* ! HAVE_ISWCNTRL */
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179
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180 #endif /* _GL_WCTYPE_H */
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181 #endif /* _GL_WCTYPE_H */