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9c9d63b1 | 1 | # wctype_h.m4 serial 26 |
8690e634 JK |
2 | |
3 | dnl A placeholder for ISO C99 <wctype.h>, for platforms that lack it. | |
4 | ||
9c9d63b1 | 5 | dnl Copyright (C) 2006-2021 Free Software Foundation, Inc. |
8690e634 JK |
6 | dnl This file is free software; the Free Software Foundation |
7 | dnl gives unlimited permission to copy and/or distribute it, | |
8 | dnl with or without modifications, as long as this notice is preserved. | |
9 | ||
10 | dnl Written by Paul Eggert. | |
11 | ||
12 | AC_DEFUN([gl_WCTYPE_H], | |
13 | [ | |
14 | AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) | |
15 | AC_REQUIRE([AC_PROG_CC]) | |
16 | AC_REQUIRE([AC_CANONICAL_HOST]) | |
17 | AC_CHECK_FUNCS_ONCE([iswcntrl]) | |
18 | if test $ac_cv_func_iswcntrl = yes; then | |
19 | HAVE_ISWCNTRL=1 | |
20 | else | |
21 | HAVE_ISWCNTRL=0 | |
22 | fi | |
23 | AC_SUBST([HAVE_ISWCNTRL]) | |
24 | ||
8690e634 JK |
25 | AC_REQUIRE([gt_TYPE_WINT_T]) |
26 | if test $gt_cv_c_wint_t = yes; then | |
27 | HAVE_WINT_T=1 | |
28 | else | |
29 | HAVE_WINT_T=0 | |
30 | fi | |
31 | AC_SUBST([HAVE_WINT_T]) | |
32 | ||
c0c3707f CB |
33 | AC_REQUIRE([gl_TYPE_WINT_T_PREREQ]) |
34 | ||
8690e634 JK |
35 | gl_CHECK_NEXT_HEADERS([wctype.h]) |
36 | if test $ac_cv_header_wctype_h = yes; then | |
37 | if test $ac_cv_func_iswcntrl = yes; then | |
38 | dnl Linux libc5 has an iswprint function that returns 0 for all arguments. | |
39 | dnl The other functions are likely broken in the same way. | |
40 | AC_CACHE_CHECK([whether iswcntrl works], [gl_cv_func_iswcntrl_works], | |
41 | [ | |
42 | AC_RUN_IFELSE( | |
43 | [AC_LANG_SOURCE([[ | |
8690e634 JK |
44 | #include <wchar.h> |
45 | #include <wctype.h> | |
46 | int main () { return iswprint ('x') == 0; } | |
47 | ]])], | |
48 | [gl_cv_func_iswcntrl_works=yes], [gl_cv_func_iswcntrl_works=no], | |
c0c3707f CB |
49 | [dnl Guess no on Linux libc5, yes otherwise. |
50 | AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[#include <stdlib.h> | |
8690e634 JK |
51 | #if __GNU_LIBRARY__ == 1 |
52 | Linux libc5 i18n is broken. | |
9c9d63b1 | 53 | #endif]], [[]])], |
8690e634 JK |
54 | [gl_cv_func_iswcntrl_works="guessing yes"], |
55 | [gl_cv_func_iswcntrl_works="guessing no"]) | |
56 | ]) | |
57 | ]) | |
58 | fi | |
59 | HAVE_WCTYPE_H=1 | |
60 | else | |
61 | HAVE_WCTYPE_H=0 | |
62 | fi | |
63 | AC_SUBST([HAVE_WCTYPE_H]) | |
64 | ||
c0c3707f CB |
65 | if test $GNULIB_OVERRIDES_WINT_T = 1; then |
66 | REPLACE_ISWCNTRL=1 | |
67 | else | |
68 | case "$gl_cv_func_iswcntrl_works" in | |
69 | *yes) REPLACE_ISWCNTRL=0 ;; | |
70 | *) REPLACE_ISWCNTRL=1 ;; | |
71 | esac | |
72 | fi | |
8690e634 JK |
73 | AC_SUBST([REPLACE_ISWCNTRL]) |
74 | ||
75 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_ISWCNTRL = 1; then | |
76 | dnl Redefine all of iswcntrl, ..., iswxdigit in <wctype.h>. | |
77 | : | |
78 | fi | |
79 | ||
80 | if test $REPLACE_ISWCNTRL = 1; then | |
81 | REPLACE_TOWLOWER=1 | |
82 | else | |
83 | AC_CHECK_FUNCS([towlower]) | |
84 | if test $ac_cv_func_towlower = yes; then | |
85 | REPLACE_TOWLOWER=0 | |
86 | else | |
87 | AC_CHECK_DECLS([towlower],,, | |
9c9d63b1 | 88 | [[#include <wchar.h> |
8690e634 JK |
89 | #if HAVE_WCTYPE_H |
90 | # include <wctype.h> | |
91 | #endif | |
92 | ]]) | |
93 | if test $ac_cv_have_decl_towlower = yes; then | |
94 | dnl On Minix 3.1.8, the system's <wctype.h> declares towlower() and | |
95 | dnl towupper() although it does not have the functions. Avoid a | |
96 | dnl collision with gnulib's replacement. | |
97 | REPLACE_TOWLOWER=1 | |
98 | else | |
99 | REPLACE_TOWLOWER=0 | |
100 | fi | |
101 | fi | |
102 | fi | |
103 | AC_SUBST([REPLACE_TOWLOWER]) | |
104 | ||
105 | if test $HAVE_ISWCNTRL = 0 || test $REPLACE_TOWLOWER = 1; then | |
106 | dnl Redefine towlower, towupper in <wctype.h>. | |
107 | : | |
108 | fi | |
109 | ||
110 | dnl We assume that the wctype() and iswctype() functions exist if and only | |
111 | dnl if the type wctype_t is defined in <wchar.h> or in <wctype.h> if that | |
112 | dnl exists. | |
113 | dnl HP-UX 11.00 declares all these in <wchar.h> and lacks <wctype.h>. | |
114 | AC_CACHE_CHECK([for wctype_t], [gl_cv_type_wctype_t], | |
115 | [AC_COMPILE_IFELSE( | |
116 | [AC_LANG_PROGRAM( | |
9c9d63b1 | 117 | [[#include <wchar.h> |
8690e634 JK |
118 | #if HAVE_WCTYPE_H |
119 | # include <wctype.h> | |
120 | #endif | |
121 | wctype_t a; | |
122 | ]], | |
123 | [[]])], | |
124 | [gl_cv_type_wctype_t=yes], | |
125 | [gl_cv_type_wctype_t=no]) | |
126 | ]) | |
127 | if test $gl_cv_type_wctype_t = no; then | |
128 | HAVE_WCTYPE_T=0 | |
129 | fi | |
130 | ||
131 | dnl We assume that the wctrans() and towctrans() functions exist if and only | |
132 | dnl if the type wctrans_t is defined in <wctype.h>. | |
133 | AC_CACHE_CHECK([for wctrans_t], [gl_cv_type_wctrans_t], | |
134 | [AC_COMPILE_IFELSE( | |
135 | [AC_LANG_PROGRAM( | |
9c9d63b1 | 136 | [[#include <wchar.h> |
8690e634 JK |
137 | #include <wctype.h> |
138 | wctrans_t a; | |
139 | ]], | |
140 | [[]])], | |
141 | [gl_cv_type_wctrans_t=yes], | |
142 | [gl_cv_type_wctrans_t=no]) | |
143 | ]) | |
144 | if test $gl_cv_type_wctrans_t = no; then | |
145 | HAVE_WCTRANS_T=0 | |
146 | fi | |
147 | ||
148 | dnl Check for declarations of anything we want to poison if the | |
149 | dnl corresponding gnulib module is not in use. | |
150 | gl_WARN_ON_USE_PREPARE([[ | |
8690e634 | 151 | #if !(defined __GLIBC__ && !defined __UCLIBC__) |
8690e634 JK |
152 | # include <wchar.h> |
153 | #endif | |
154 | #include <wctype.h> | |
155 | ]], | |
156 | [wctype iswctype wctrans towctrans | |
157 | ]) | |
158 | ]) | |
159 | ||
160 | AC_DEFUN([gl_WCTYPE_MODULE_INDICATOR], | |
161 | [ | |
162 | dnl Use AC_REQUIRE here, so that the default settings are expanded once only. | |
163 | AC_REQUIRE([gl_WCTYPE_H_DEFAULTS]) | |
164 | gl_MODULE_INDICATOR_SET_VARIABLE([$1]) | |
165 | dnl Define it also as a C macro, for the benefit of the unit tests. | |
166 | gl_MODULE_INDICATOR_FOR_TESTS([$1]) | |
167 | ]) | |
168 | ||
169 | AC_DEFUN([gl_WCTYPE_H_DEFAULTS], | |
170 | [ | |
171 | GNULIB_ISWBLANK=0; AC_SUBST([GNULIB_ISWBLANK]) | |
5df4cba6 SM |
172 | GNULIB_ISWDIGIT=0; AC_SUBST([GNULIB_ISWDIGIT]) |
173 | GNULIB_ISWXDIGIT=0; AC_SUBST([GNULIB_ISWXDIGIT]) | |
8690e634 JK |
174 | GNULIB_WCTYPE=0; AC_SUBST([GNULIB_WCTYPE]) |
175 | GNULIB_ISWCTYPE=0; AC_SUBST([GNULIB_ISWCTYPE]) | |
176 | GNULIB_WCTRANS=0; AC_SUBST([GNULIB_WCTRANS]) | |
177 | GNULIB_TOWCTRANS=0; AC_SUBST([GNULIB_TOWCTRANS]) | |
178 | dnl Assume proper GNU behavior unless another module says otherwise. | |
179 | HAVE_ISWBLANK=1; AC_SUBST([HAVE_ISWBLANK]) | |
180 | HAVE_WCTYPE_T=1; AC_SUBST([HAVE_WCTYPE_T]) | |
181 | HAVE_WCTRANS_T=1; AC_SUBST([HAVE_WCTRANS_T]) | |
182 | REPLACE_ISWBLANK=0; AC_SUBST([REPLACE_ISWBLANK]) | |
5df4cba6 SM |
183 | REPLACE_ISWDIGIT=0; AC_SUBST([REPLACE_ISWDIGIT]) |
184 | REPLACE_ISWXDIGIT=0; AC_SUBST([REPLACE_ISWXDIGIT]) | |
8690e634 | 185 | ]) |