| 1 | # wctype_h.m4 serial 30
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| 2 |
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| 3 | dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it.
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| 4 |
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| 5 | dnl Copyright (C) 2006-2021 Free Software Foundation, Inc.
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| 6 | dnl This file is free software; the Free Software Foundation
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| 7 | dnl gives unlimited permission to copy and/or distribute it,
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| 8 | dnl with or without modifications, as long as this notice is preserved.
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| 9 |
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| 10 | dnl Written by Paul Eggert.
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| 11 |
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| 12 | AC_DEFUN_ONCE([gl_WCTYPE_H],
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| 13 | [
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| 14 | AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
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| 15 | AC_REQUIRE([AC_PROG_CC])
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| 16 | AC_REQUIRE([AC_CANONICAL_HOST])
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| 17 | AC_CHECK_FUNCS_ONCE([iswcntrl])
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| 18 | if test $ac_cv_func_iswcntrl = yes; then
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| 19 | HAVE_ISWCNTRL=1
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| 20 | else
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| 21 | HAVE_ISWCNTRL=0
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| 22 | fi
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| 23 | AC_SUBST([HAVE_ISWCNTRL])
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| 24 |
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| 25 | AC_REQUIRE([gt_TYPE_WINT_T])
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| 26 | if test $gt_cv_c_wint_t = yes; then
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| 27 | HAVE_WINT_T=1
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| 28 | else
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| 29 | HAVE_WINT_T=0
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| 30 | fi
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| 31 | AC_SUBST([HAVE_WINT_T])
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| 32 |
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| 33 | AC_REQUIRE([gl_TYPE_WINT_T_PREREQ])
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| 34 |
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| 35 | gl_CHECK_NEXT_HEADERS([wctype.h])
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| 36 | if test $ac_cv_header_wctype_h = yes; then
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| 37 | if test $ac_cv_func_iswcntrl = yes; then
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| 38 | dnl Linux libc5 has an iswprint function that returns 0 for all arguments.
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| 39 | dnl The other functions are likely broken in the same way.
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| 40 | AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works],
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| 41 | [
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| 42 | AC_RUN_IFELSE(
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| 43 | [AC_LANG_SOURCE([[
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| 44 | #include <wchar.h>
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| 45 | #include <wctype.h>
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| 46 | int main () { return iswprint ('x') == 0; }
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| 47 | ]])],
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| 48 | [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no],
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| 49 | [dnl Guess no on Linux libc5, yes otherwise.
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| 50 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h>
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| 51 | #if __GNU_LIBRARY__ == 1
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| 52 | Linux libc5 i18n is broken.
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| 53 | #endif]], [[]])],
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| 54 | [gl_cv_func_iswcntrl_works="guessing yes"],
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| 55 | [gl_cv_func_iswcntrl_works="guessing no"])
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| 56 | ])
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| 57 | ])
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| 58 | fi
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| 59 | HAVE_WCTYPE_H=1
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| 60 | else
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| 61 | HAVE_WCTYPE_H=0
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| 62 | fi
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| 63 | AC_SUBST([HAVE_WCTYPE_H])
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| 64 |
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| 65 | if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
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| 66 | REPLACE_ISWCNTRL=1
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| 67 | else
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| 68 | case "$gl_cv_func_iswcntrl_works" in
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| 69 | *yes) REPLACE_ISWCNTRL=0 ;;
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| 70 | *) REPLACE_ISWCNTRL=1 ;;
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| 71 | esac
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| 72 | fi
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| 73 | AC_SUBST([REPLACE_ISWCNTRL])
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| 74 |
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| 75 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then
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| 76 | dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>.
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| 77 | :
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| 78 | fi
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| 79 |
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| 80 | if test $REPLACE_ISWCNTRL = 1; then
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| 81 | REPLACE_TOWLOWER=1
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| 82 | else
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| 83 | AC_CHECK_FUNCS([towlower])
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| 84 | if test $ac_cv_func_towlower = yes; then
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| 85 | REPLACE_TOWLOWER=0
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| 86 | else
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| 87 | AC_CHECK_DECLS([towlower],,,
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| 88 | [[#include <wchar.h>
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| 89 | #if HAVE_WCTYPE_H
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| 90 | # include <wctype.h>
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| 91 | #endif
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| 92 | ]])
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| 93 | if test $ac_cv_have_decl_towlower = yes; then
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| 94 | dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and
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| 95 | dnl towupper() although it does not have the functions. Avoid a
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| 96 | dnl collision with gnulib's replacement.
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| 97 | REPLACE_TOWLOWER=1
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| 98 | else
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| 99 | REPLACE_TOWLOWER=0
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| 100 | fi
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| 101 | fi
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| 102 | fi
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| 103 | AC_SUBST([REPLACE_TOWLOWER])
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| 104 |
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| 105 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then
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| 106 | dnl Redefine towlower, towupper in <wctype.h>.
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| 107 | :
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| 108 | fi
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| 109 |
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| 110 | dnl We assume that the wctype() and iswctype() functions exist if and only
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| 111 | dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that
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| 112 | dnl exists.
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| 113 | dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>.
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| 114 | AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t],
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| 115 | [AC_COMPILE_IFELSE(
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| 116 | [AC_LANG_PROGRAM(
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| 117 | [[#include <wchar.h>
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| 118 | #if HAVE_WCTYPE_H
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| 119 | # include <wctype.h>
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| 120 | #endif
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| 121 | wctype_t a;
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| 122 | ]],
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| 123 | [[]])],
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| 124 | [gl_cv_type_wctype_t=yes],
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| 125 | [gl_cv_type_wctype_t=no])
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| 126 | ])
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| 127 | if test $gl_cv_type_wctype_t = no; then
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| 128 | HAVE_WCTYPE_T=0
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| 129 | fi
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| 130 |
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| 131 | dnl We assume that the wctrans() and towctrans() functions exist if and only
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| 132 | dnl if the type wctrans_t is defined in <wctype.h>.
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| 133 | AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t],
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| 134 | [AC_COMPILE_IFELSE(
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| 135 | [AC_LANG_PROGRAM(
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| 136 | [[#include <wchar.h>
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| 137 | #include <wctype.h>
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| 138 | wctrans_t a;
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| 139 | ]],
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| 140 | [[]])],
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| 141 | [gl_cv_type_wctrans_t=yes],
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| 142 | [gl_cv_type_wctrans_t=no])
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| 143 | ])
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| 144 | if test $gl_cv_type_wctrans_t = no; then
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| 145 | HAVE_WCTRANS_T=0
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| 146 | fi
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| 147 |
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| 148 | dnl Check for declarations of anything we want to poison if the
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| 149 | dnl corresponding gnulib module is not in use.
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| 150 | gl_WARN_ON_USE_PREPARE([[
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| 151 | #if !(defined __GLIBC__ && !defined __UCLIBC__)
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| 152 | # include <wchar.h>
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| 153 | #endif
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| 154 | #include <wctype.h>
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| 155 | ]],
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| 156 | [wctype iswctype wctrans towctrans
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| 157 | ])
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| 158 | ])
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| 159 |
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| 160 | # gl_WCTYPE_MODULE_INDICATOR([modulename])
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| 161 | # sets the shell variable that indicates the presence of the given module
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| 162 | # to a C preprocessor expression that will evaluate to 1.
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| 163 | # This macro invocation must not occur in macros that are AC_REQUIREd.
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| 164 | AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR],
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| 165 | [
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| 166 | dnl Ensure to expand the default settings once only.
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| 167 | gl_WCTYPE_H_REQUIRE_DEFAULTS
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| 168 | gl_MODULE_INDICATOR_SET_VARIABLE([$1])
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| 169 | dnl Define it also as a C macro, for the benefit of the unit tests.
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| 170 | gl_MODULE_INDICATOR_FOR_TESTS([$1])
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| 171 | ])
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| 172 |
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| 173 | # Initializes the default values for AC_SUBSTed shell variables.
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| 174 | # This macro must not be AC_REQUIREd. It must only be invoked, and only
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| 175 | # outside of macros or in macros that are not AC_REQUIREd.
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| 176 | AC_DEFUN([gl_WCTYPE_H_REQUIRE_DEFAULTS],
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| 177 | [
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| 178 | m4_defun(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS], [
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| 179 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWBLANK])
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| 180 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWDIGIT])
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| 181 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWXDIGIT])
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| 182 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTYPE])
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| 183 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_ISWCTYPE])
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| 184 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_WCTRANS])
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| 185 | gl_MODULE_INDICATOR_INIT_VARIABLE([GNULIB_TOWCTRANS])
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| 186 | ])
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| 187 | m4_require(GL_MODULE_INDICATOR_PREFIX[_WCTYPE_H_MODULE_INDICATOR_DEFAULTS])
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| 188 | AC_REQUIRE([gl_WCTYPE_H_DEFAULTS])
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| 189 | ])
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| 190 |
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| 191 | AC_DEFUN([gl_WCTYPE_H_DEFAULTS],
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| 192 | [
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| 193 | dnl Assume proper GNU behavior unless another module says otherwise.
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| 194 | HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK])
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| 195 | HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T])
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| 196 | HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T])
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| 197 | REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK])
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| 198 | REPLACE_ISWDIGIT=0; AC_SUBST([REPLACE_ISWDIGIT])
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| 199 | REPLACE_ISWXDIGIT=0; AC_SUBST([REPLACE_ISWXDIGIT])
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| 200 | ])
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