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Diffstat (limited to 'm4/mbsrtowcs.m4')
| -rw-r--r-- | m4/mbsrtowcs.m4 | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/m4/mbsrtowcs.m4 b/m4/mbsrtowcs.m4 new file mode 100644 index 0000000..871dd96 --- /dev/null +++ b/m4/mbsrtowcs.m4 @@ -0,0 +1,155 @@ +# mbsrtowcs.m4 serial 13 +dnl Copyright (C) 2008-2018 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. + +AC_DEFUN([gl_FUNC_MBSRTOWCS], +[ + AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) + + AC_REQUIRE([AC_TYPE_MBSTATE_T]) + gl_MBSTATE_T_BROKEN + + AC_CHECK_FUNCS_ONCE([mbsrtowcs]) + if test $ac_cv_func_mbsrtowcs = no; then + HAVE_MBSRTOWCS=0 + AC_CHECK_DECLS([mbsrtowcs],,, [[ +/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before + <wchar.h>. + BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be + included before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <time.h> +#include <wchar.h> +]]) + if test $ac_cv_have_decl_mbsrtowcs = yes; then + dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() although + dnl it does not have the function. Avoid a collision with gnulib's + dnl replacement. + REPLACE_MBSRTOWCS=1 + fi + else + if test $REPLACE_MBSTATE_T = 1; then + REPLACE_MBSRTOWCS=1 + else + gl_MBSRTOWCS_WORKS + case "$gl_cv_func_mbsrtowcs_works" in + *yes) ;; + *) REPLACE_MBSRTOWCS=1 ;; + esac + fi + fi +]) + +dnl Test whether mbsrtowcs works. +dnl Result is gl_cv_func_mbsrtowcs_works. + +AC_DEFUN([gl_MBSRTOWCS_WORKS], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gt_LOCALE_FR]) + AC_REQUIRE([gt_LOCALE_FR_UTF8]) + AC_REQUIRE([gt_LOCALE_JA]) + AC_REQUIRE([gt_LOCALE_ZH_CN]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether mbsrtowcs works], + [gl_cv_func_mbsrtowcs_works], + [ + dnl Initial guess, used when cross-compiling or when no suitable locale + dnl is present. +changequote(,)dnl + case "$host_os" in + # Guess no on HP-UX, Solaris, mingw. + hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;; + # Guess yes otherwise. + *) gl_cv_func_mbsrtowcs_works="guessing yes" ;; + esac +changequote([,])dnl + if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then + AC_RUN_IFELSE( + [AC_LANG_SOURCE([[ +#include <locale.h> +#include <string.h> +/* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before + <wchar.h>. + BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be + included before <wchar.h>. */ +#include <stddef.h> +#include <stdio.h> +#include <time.h> +#include <wchar.h> +int main () +{ + int result = 0; + /* Test whether the function supports a NULL destination argument. + This fails on native Windows. */ + if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) + { + const char input[] = "\337er"; + const char *src = input; + mbstate_t state; + + memset (&state, '\0', sizeof (mbstate_t)); + if (mbsrtowcs (NULL, &src, 1, &state) != 3 + || src != input) + result |= 1; + } + /* Test whether the function works when started with a conversion state + in non-initial state. This fails on HP-UX 11.11 and Solaris 10. */ + if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) + { + const char input[] = "B\303\274\303\237er"; + mbstate_t state; + + memset (&state, '\0', sizeof (mbstate_t)); + if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2)) + if (!mbsinit (&state)) + { + const char *src = input + 2; + if (mbsrtowcs (NULL, &src, 10, &state) != 4) + result |= 2; + } + } + if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) + { + const char input[] = "<\306\374\313\334\270\354>"; + mbstate_t state; + + memset (&state, '\0', sizeof (mbstate_t)); + if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2)) + if (!mbsinit (&state)) + { + const char *src = input + 4; + if (mbsrtowcs (NULL, &src, 10, &state) != 3) + result |= 4; + } + } + if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) + { + const char input[] = "B\250\271\201\060\211\070er"; + mbstate_t state; + + memset (&state, '\0', sizeof (mbstate_t)); + if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2)) + if (!mbsinit (&state)) + { + const char *src = input + 2; + if (mbsrtowcs (NULL, &src, 10, &state) != 4) + result |= 8; + } + } + return result; +}]])], + [gl_cv_func_mbsrtowcs_works=yes], + [gl_cv_func_mbsrtowcs_works=no], + [:]) + fi + ]) +]) + +# Prerequisites of lib/mbsrtowcs.c. +AC_DEFUN([gl_PREREQ_MBSRTOWCS], [ + : +]) |