2 dnl Copyright (C) 2008, 2010 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 AC_DEFUN([gl_FUNC_MBRLEN],
9 AC_REQUIRE([gl_WCHAR_H_DEFAULTS])
11 AC_REQUIRE([AC_TYPE_MBSTATE_T])
12 AC_REQUIRE([gl_FUNC_MBRTOWC])
13 AC_CHECK_FUNCS_ONCE([mbrlen])
14 if test $ac_cv_func_mbrlen = no; then
17 dnl Most bugs affecting the system's mbrtowc function also affect the
18 dnl mbrlen function. So override mbrlen whenever mbrtowc is overridden.
19 dnl We could also run the individual tests below; the results would be
21 if test $REPLACE_MBRTOWC = 1; then
25 if test $HAVE_MBRLEN = 0 || test $REPLACE_MBRLEN = 1; then
32 dnl Test whether mbrlen puts the state into non-initial state when parsing an
33 dnl incomplete multibyte character.
34 dnl Result is gl_cv_func_mbrlen_incomplete_state.
36 AC_DEFUN([gl_MBRLEN_INCOMPLETE_STATE],
38 AC_REQUIRE([AC_PROG_CC])
39 AC_REQUIRE([gt_LOCALE_JA])
40 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
41 AC_CACHE_CHECK([whether mbrlen handles incomplete characters],
42 [gl_cv_func_mbrlen_incomplete_state],
44 dnl Initial guess, used when cross-compiling or when no suitable locale
48 # Guess no on AIX and OSF/1.
49 aix* | osf*) gl_cv_func_mbrlen_incomplete_state="guessing no" ;;
50 # Guess yes otherwise.
51 *) gl_cv_func_mbrlen_incomplete_state="guessing yes" ;;
54 if test $LOCALE_JA != none; then
62 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
64 const char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
67 memset (&state, '\0', sizeof (mbstate_t));
68 if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
74 [gl_cv_func_mbrlen_incomplete_state=yes],
75 [gl_cv_func_mbrlen_incomplete_state=no],
81 dnl Test whether mbrlen, when parsing the end of a multibyte character,
82 dnl correctly returns the number of bytes that were needed to complete the
83 dnl character (not the total number of bytes of the multibyte character).
84 dnl Result is gl_cv_func_mbrlen_retval.
86 AC_DEFUN([gl_MBRLEN_RETVAL],
88 AC_REQUIRE([AC_PROG_CC])
89 AC_REQUIRE([gt_LOCALE_FR_UTF8])
90 AC_REQUIRE([gt_LOCALE_JA])
91 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
92 AC_CACHE_CHECK([whether mbrlen has a correct return value],
93 [gl_cv_func_mbrlen_retval],
95 dnl Initial guess, used when cross-compiling or when no suitable locale
99 # Guess no on HP-UX and Solaris.
100 hpux* | solaris*) gl_cv_func_mbrlen_retval="guessing no" ;;
101 # Guess yes otherwise.
102 *) gl_cv_func_mbrlen_retval="guessing yes" ;;
105 if test $LOCALE_FR_UTF8 != none || test $LOCALE_JA != none; then
113 /* This fails on Solaris. */
114 if (setlocale (LC_ALL, "$LOCALE_FR_UTF8") != NULL)
116 char input[] = "B\303\274\303\237er"; /* "Büßer" */
119 memset (&state, '\0', sizeof (mbstate_t));
120 if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
123 if (mbrlen (input + 2, 5, &state) != 1)
127 /* This fails on HP-UX 11.11. */
128 if (setlocale (LC_ALL, "$LOCALE_JA") != NULL)
130 char input[] = "B\217\253\344\217\251\316er"; /* "Büßer" */
133 memset (&state, '\0', sizeof (mbstate_t));
134 if (mbrlen (input + 1, 1, &state) == (size_t)(-2))
137 if (mbrlen (input + 2, 5, &state) != 2)
143 [gl_cv_func_mbrlen_retval=yes],
144 [gl_cv_func_mbrlen_retval=no],
150 dnl Test whether mbrlen, when parsing a NUL character, correctly returns 0.
151 dnl Result is gl_cv_func_mbrlen_nul_retval.
153 AC_DEFUN([gl_MBRLEN_NUL_RETVAL],
155 AC_REQUIRE([AC_PROG_CC])
156 AC_REQUIRE([gt_LOCALE_ZH_CN])
157 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
158 AC_CACHE_CHECK([whether mbrlen returns 0 when parsing a NUL character],
159 [gl_cv_func_mbrlen_nul_retval],
161 dnl Initial guess, used when cross-compiling or when no suitable locale
165 # Guess no on Solaris 9.
166 solaris2.9) gl_cv_func_mbrlen_nul_retval="guessing no" ;;
167 # Guess yes otherwise.
168 *) gl_cv_func_mbrlen_nul_retval="guessing yes" ;;
171 if test $LOCALE_ZH_CN != none; then
179 /* This crashes on Solaris 9 inside __mbrtowc_dense_gb18030. */
180 if (setlocale (LC_ALL, "$LOCALE_ZH_CN") != NULL)
184 memset (&state, '\0', sizeof (mbstate_t));
185 if (mbrlen ("", 1, &state) != 0)
190 [gl_cv_func_mbrlen_nul_retval=yes],
191 [gl_cv_func_mbrlen_nul_retval=no],
197 # Prerequisites of lib/mbrlen.c.
198 AC_DEFUN([gl_PREREQ_MBRLEN], [