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annotate m4/mbsrtowcs.m4 @ 40196:e63f5d3edab5

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relocatable-prog: Update documentation. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes.
author Bruno Haible <bruno@clisp.org>
date Sun, 24 Feb 2019 01:49:15 +0100
parents b06060465f09
children
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1 # mbsrtowcs.m4 serial 13
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2 dnl Copyright (C) 2008-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_MBSRTOWCS],
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8 [
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9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
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10
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11 AC_REQUIRE([AC_TYPE_MBSTATE_T])
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12 gl_MBSTATE_T_BROKEN
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13
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14 AC_CHECK_FUNCS_ONCE([mbsrtowcs])
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15 if test $ac_cv_func_mbsrtowcs = no; then
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16 HAVE_MBSRTOWCS=0
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17 AC_CHECK_DECLS([mbsrtowcs],,, [[
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18 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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19 <wchar.h>.
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20 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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21 included before <wchar.h>. */
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22 #include <stddef.h>
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23 #include <stdio.h>
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24 #include <time.h>
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25 #include <wchar.h>
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26 ]])
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27 if test $ac_cv_have_decl_mbsrtowcs = yes; then
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28 dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() although
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29 dnl it does not have the function. Avoid a collision with gnulib's
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30 dnl replacement.
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31 REPLACE_MBSRTOWCS=1
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32 fi
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33 else
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34 if test $REPLACE_MBSTATE_T = 1; then
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35 REPLACE_MBSRTOWCS=1
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36 else
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37 gl_MBSRTOWCS_WORKS
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38 case "$gl_cv_func_mbsrtowcs_works" in
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39 *yes) ;;
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40 *) REPLACE_MBSRTOWCS=1 ;;
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41 esac
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42 fi
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43 fi
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44 ])
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45
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46 dnl Test whether mbsrtowcs works.
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47 dnl Result is gl_cv_func_mbsrtowcs_works.
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48
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49 AC_DEFUN([gl_MBSRTOWCS_WORKS],
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50 [
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51 AC_REQUIRE([AC_PROG_CC])
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52 AC_REQUIRE([gt_LOCALE_FR])
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53 AC_REQUIRE([gt_LOCALE_FR_UTF8])
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54 AC_REQUIRE([gt_LOCALE_JA])
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55 AC_REQUIRE([gt_LOCALE_ZH_CN])
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56 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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57 AC_CACHE_CHECK([whether mbsrtowcs works],
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58 [gl_cv_func_mbsrtowcs_works],
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59 [
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60 dnl Initial guess, used when cross-compiling or when no suitable locale
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61 dnl is present.
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62 changequote(,)dnl
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63 case "$host_os" in
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64 # Guess no on HP-UX, Solaris, mingw.
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65 hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;;
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66 # Guess yes otherwise.
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67 *) gl_cv_func_mbsrtowcs_works="guessing yes" ;;
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68 esac
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69 changequote([,])dnl
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70 if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then
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71 AC_RUN_IFELSE(
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72 [AC_LANG_SOURCE([[
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73 #include <locale.h>
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74 #include <string.h>
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75 /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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76 <wchar.h>.
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77 BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
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78 included before <wchar.h>. */
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79 #include <stddef.h>
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80 #include <stdio.h>
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81 #include <time.h>
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82 #include <wchar.h>
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83 int main ()
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84 {
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85 int result = 0;
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86 /* Test whether the function supports a NULL destination argument.
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87 This fails on native Windows. */
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88 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL)
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89 {
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90 const char input[] = "\337er";
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91 const char *src = input;
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92 mbstate_t state;
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93
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94 memset (&state, '\0', sizeof (mbstate_t));
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95 if (mbsrtowcs (NULL, &src, 1, &state) != 3
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96 || src != input)
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97 result |= 1;
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98 }
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99 /* Test whether the function works when started with a conversion state
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100 in non-initial state. This fails on HP-UX 11.11 and Solaris 10. */
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101 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
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102 {
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103 const char input[] = "B\303\274\303\237er";
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104 mbstate_t state;
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105
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106 memset (&state, '\0', sizeof (mbstate_t));
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107 if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
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108 if (!mbsinit (&state))
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109 {
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110 const char *src = input + 2;
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111 if (mbsrtowcs (NULL, &src, 10, &state) != 4)
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112 result |= 2;
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113 }
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114 }
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115 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
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116 {
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117 const char input[] = "<\306\374\313\334\270\354>";
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118 mbstate_t state;
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119
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120 memset (&state, '\0', sizeof (mbstate_t));
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121 if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2))
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122 if (!mbsinit (&state))
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123 {
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124 const char *src = input + 4;
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125 if (mbsrtowcs (NULL, &src, 10, &state) != 3)
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126 result |= 4;
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127 }
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128 }
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129 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
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130 {
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131 const char input[] = "B\250\271\201\060\211\070er";
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132 mbstate_t state;
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133
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134 memset (&state, '\0', sizeof (mbstate_t));
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135 if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2))
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136 if (!mbsinit (&state))
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137 {
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138 const char *src = input + 2;
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139 if (mbsrtowcs (NULL, &src, 10, &state) != 4)
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140 result |= 8;
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141 }
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142 }
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143 return result;
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144 }]])],
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145 [gl_cv_func_mbsrtowcs_works=yes],
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146 [gl_cv_func_mbsrtowcs_works=no],
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147 [:])
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148 fi
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149 ])
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150 ])
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151
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152 # Prerequisites of lib/mbsrtowcs.c.
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153 AC_DEFUN([gl_PREREQ_MBSRTOWCS], [
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154 :
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155 ])