1# mbsrtowcs.m4 serial 14 2dnl Copyright (C) 2008-2021 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7AC_DEFUN([gl_FUNC_MBSRTOWCS], 8[ 9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS]) 10 11 AC_REQUIRE([AC_TYPE_MBSTATE_T]) 12 gl_MBSTATE_T_BROKEN 13 14 AC_CHECK_FUNCS_ONCE([mbsrtowcs]) 15 if test $ac_cv_func_mbsrtowcs = no; then 16 HAVE_MBSRTOWCS=0 17 AC_CHECK_DECLS([mbsrtowcs],,, [[ 18 #include <wchar.h> 19 ]]) 20 if test $ac_cv_have_decl_mbsrtowcs = yes; then 21 dnl On Minix 3.1.8, the system's <wchar.h> declares mbsrtowcs() although 22 dnl it does not have the function. Avoid a collision with gnulib's 23 dnl replacement. 24 REPLACE_MBSRTOWCS=1 25 fi 26 else 27 if test $REPLACE_MBSTATE_T = 1; then 28 REPLACE_MBSRTOWCS=1 29 else 30 gl_MBSRTOWCS_WORKS 31 case "$gl_cv_func_mbsrtowcs_works" in 32 *yes) ;; 33 *) REPLACE_MBSRTOWCS=1 ;; 34 esac 35 fi 36 fi 37]) 38 39dnl Test whether mbsrtowcs works. 40dnl Result is gl_cv_func_mbsrtowcs_works. 41 42AC_DEFUN([gl_MBSRTOWCS_WORKS], 43[ 44 AC_REQUIRE([AC_PROG_CC]) 45 AC_REQUIRE([gt_LOCALE_FR]) 46 AC_REQUIRE([gt_LOCALE_FR_UTF8]) 47 AC_REQUIRE([gt_LOCALE_JA]) 48 AC_REQUIRE([gt_LOCALE_ZH_CN]) 49 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles 50 AC_CACHE_CHECK([whether mbsrtowcs works], 51 [gl_cv_func_mbsrtowcs_works], 52 [ 53 dnl Initial guess, used when cross-compiling or when no suitable locale 54 dnl is present. 55changequote(,)dnl 56 case "$host_os" in 57 # Guess no on HP-UX, Solaris, mingw. 58 hpux* | solaris* | mingw*) gl_cv_func_mbsrtowcs_works="guessing no" ;; 59 # Guess yes otherwise. 60 *) gl_cv_func_mbsrtowcs_works="guessing yes" ;; 61 esac 62changequote([,])dnl 63 if test $LOCALE_FR != none || test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none || test $LOCALE_ZH_CN != none; then 64 AC_RUN_IFELSE( 65 [AC_LANG_SOURCE([[ 66#include <locale.h> 67#include <string.h> 68#include <wchar.h> 69int main () 70{ 71 int result = 0; 72 /* Test whether the function supports a NULL destination argument. 73 This fails on native Windows. */ 74 if (setlocale (LC_ALL, "$LOCALE_FR") != NULL) 75 { 76 const char input[] = "\337er"; 77 const char *src = input; 78 mbstate_t state; 79 80 memset (&state, '\0', sizeof (mbstate_t)); 81 if (mbsrtowcs (NULL, &src, 1, &state) != 3 82 || src != input) 83 result |= 1; 84 } 85 /* Test whether the function works when started with a conversion state 86 in non-initial state. This fails on HP-UX 11.11 and Solaris 10. */ 87 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL) 88 { 89 const char input[] = "B\303\274\303\237er"; 90 mbstate_t state; 91 92 memset (&state, '\0', sizeof (mbstate_t)); 93 if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2)) 94 if (!mbsinit (&state)) 95 { 96 const char *src = input + 2; 97 if (mbsrtowcs (NULL, &src, 10, &state) != 4) 98 result |= 2; 99 } 100 } 101 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL) 102 { 103 const char input[] = "<\306\374\313\334\270\354>"; 104 mbstate_t state; 105 106 memset (&state, '\0', sizeof (mbstate_t)); 107 if (mbrtowc (NULL, input + 3, 1, &state) == (size_t)(-2)) 108 if (!mbsinit (&state)) 109 { 110 const char *src = input + 4; 111 if (mbsrtowcs (NULL, &src, 10, &state) != 3) 112 result |= 4; 113 } 114 } 115 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL) 116 { 117 const char input[] = "B\250\271\201\060\211\070er"; 118 mbstate_t state; 119 120 memset (&state, '\0', sizeof (mbstate_t)); 121 if (mbrtowc (NULL, input + 1, 1, &state) == (size_t)(-2)) 122 if (!mbsinit (&state)) 123 { 124 const char *src = input + 2; 125 if (mbsrtowcs (NULL, &src, 10, &state) != 4) 126 result |= 8; 127 } 128 } 129 return result; 130}]])], 131 [gl_cv_func_mbsrtowcs_works=yes], 132 [gl_cv_func_mbsrtowcs_works=no], 133 [:]) 134 fi 135 ]) 136]) 137 138# Prerequisites of lib/mbsrtowcs.c. 139AC_DEFUN([gl_PREREQ_MBSRTOWCS], [ 140 : 141]) 142