From b0afb8fe0ff1d87165af9df61501197a06240dda Mon Sep 17 00:00:00 2001 From: Lorenz Kästle <12514511+RincewindsHat@users.noreply.github.com> Date: Sun, 28 Dec 2025 12:13:40 +0100 Subject: Sync with Gnulib stable-202507 code (a8ac9f9ce5) --- gl/m4/c32rtomb.m4 | 187 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 gl/m4/c32rtomb.m4 (limited to 'gl/m4/c32rtomb.m4') diff --git a/gl/m4/c32rtomb.m4 b/gl/m4/c32rtomb.m4 new file mode 100644 index 00000000..ce26a31e --- /dev/null +++ b/gl/m4/c32rtomb.m4 @@ -0,0 +1,187 @@ +# c32rtomb.m4 +# serial 8 +dnl Copyright (C) 2020-2025 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. +dnl This file is offered as-is, without any warranty. + +AC_DEFUN([gl_FUNC_C32RTOMB], +[ + AC_REQUIRE([gl_UCHAR_H_DEFAULTS]) + AC_REQUIRE([AC_CANONICAL_HOST]) + + AC_REQUIRE([gl_MBRTOC32_SANITYCHECK]) + AC_REQUIRE([gl_C32RTOMB_SANITYCHECK]) + + AC_REQUIRE([gl_CHECK_FUNC_C32RTOMB]) + if test $gl_cv_func_c32rtomb = no; then + HAVE_C32RTOMB=0 + else + dnl When we override mbrtoc32, redefining the meaning of the char32_t + dnl values, we need to override c32rtomb as well, for consistency. + if test $HAVE_WORKING_MBRTOC32 = 0; then + REPLACE_C32RTOMB=1 + fi + AC_CACHE_CHECK([whether c32rtomb return value is correct], + [gl_cv_func_c32rtomb_retval], + [ + dnl Initial guess, used when cross-compiling. +changequote(,)dnl + case "$host_os" in + # Guess no on AIX. + aix*) gl_cv_func_c32rtomb_retval="guessing no" ;; + # Guess yes otherwise. + *) gl_cv_func_c32rtomb_retval="guessing yes" ;; + esac +changequote([,])dnl + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include +#ifdef __HAIKU__ + #include +#endif +#include +int main () +{ + int result = 0; + if (c32rtomb (NULL, 0, NULL) != 1) + result |= 1; + return result; +}]])], + [gl_cv_func_c32rtomb_retval=yes], + [gl_cv_func_c32rtomb_retval=no], + [:]) + ]) + case "$gl_cv_func_c32rtomb_retval" in + *yes) ;; + *) AC_DEFINE([C32RTOMB_RETVAL_BUG], [1], + [Define if the c32rtomb function has an incorrect return value.]) + REPLACE_C32RTOMB=1 ;; + esac + if test $HAVE_WORKING_C32RTOMB = 0; then + REPLACE_C32RTOMB=1 + fi + fi +]) + +AC_DEFUN([gl_CHECK_FUNC_C32RTOMB], +[ + dnl Cf. gl_CHECK_FUNCS_ANDROID + AC_CHECK_DECL([c32rtomb], , , + [[#ifdef __HAIKU__ + #include + #endif + #include + ]]) + if test $ac_cv_have_decl_c32rtomb = yes; then + dnl We can't use AC_CHECK_FUNC here, because c32rtomb() is defined as a + dnl static inline function on Haiku 2020. + AC_CACHE_CHECK([for c32rtomb], [gl_cv_func_c32rtomb], + [AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[#include + #ifdef __HAIKU__ + #include + #endif + #include + ]], + [[char buf[8]; + return c32rtomb (buf, 0, NULL) == 0; + ]]) + ], + [gl_cv_func_c32rtomb=yes], + [gl_cv_func_c32rtomb=no]) + ]) + else + gl_cv_func_c32rtomb=no + fi +]) + +dnl Test whether c32rtomb works not worse than wcrtomb. +dnl Result is HAVE_WORKING_C32RTOMB. + +AC_DEFUN([gl_C32RTOMB_SANITYCHECK], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gl_TYPE_CHAR32_T]) + AC_REQUIRE([gl_CHECK_FUNC_C32RTOMB]) + AC_REQUIRE([gt_LOCALE_ZH_CN]) + AC_REQUIRE([AC_CANONICAL_HOST]) + if test $GNULIBHEADERS_OVERRIDE_CHAR32_T = 1 || test $gl_cv_func_c32rtomb = no; then + HAVE_WORKING_C32RTOMB=0 + else + AC_CACHE_CHECK([whether c32rtomb works as well as wcrtomb], + [gl_cv_func_c32rtomb_sanitycheck], + [ + dnl Initial guess, used when cross-compiling or when no suitable locale + dnl is present. +changequote(,)dnl + case "$host_os" in + # Guess no on Solaris derivatives. + solaris*) + if test -f /etc/release && grep 'Oracle Solaris' /etc/release >/dev/null; then + gl_cv_func_c32rtomb_sanitycheck="guessing yes" + else + gl_cv_func_c32rtomb_sanitycheck="guessing no" + fi + ;; + # Guess yes otherwise. + *) + gl_cv_func_c32rtomb_sanitycheck="guessing yes" + ;; + esac +changequote([,])dnl + if test $LOCALE_ZH_CN != none; then + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include +#include +#include +#include +#ifdef __HAIKU__ + #include +#endif +#include +int main () +{ + int result = 0; + /* This fails on Solaris 11 OmniOS: + c32rtomb returns (size_t)-1. + wcrtomb returns 4 (correct). */ + if (strcmp ("$LOCALE_ZH_CN", "none") != 0 + && setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) + { + mbstate_t state; + wchar_t wc = (wchar_t) 0xBADFACE; + char buf[16]; + memset (&state, '\0', sizeof (mbstate_t)); + if (mbrtowc (&wc, "\201\060\211\070", 4, &state) == 4 + && wcrtomb (buf, wc, NULL) == 4 + && memcmp (buf, "\201\060\211\070", 4) == 0) + { + char32_t c32 = (wchar_t) 0xBADFACE; + memset (&state, '\0', sizeof (mbstate_t)); + if (mbrtoc32 (&c32, "\201\060\211\070", 4, &state) == 4 + && c32rtomb (buf, c32, NULL) != 4) + result |= 1; + } + } + return result; +}]])], + [gl_cv_func_c32rtomb_sanitycheck=yes], + [gl_cv_func_c32rtomb_sanitycheck=no], + [:]) + fi + ]) + case "$gl_cv_func_c32rtomb_sanitycheck" in + *yes) + HAVE_WORKING_C32RTOMB=1 + AC_DEFINE([HAVE_WORKING_C32RTOMB], [1], + [Define if the c32rtomb function basically works.]) + ;; + *) HAVE_WORKING_C32RTOMB=0 ;; + esac + fi + AC_SUBST([HAVE_WORKING_C32RTOMB]) +]) -- cgit v1.2.3-74-g34f1