-# printf.m4 serial 6
+# printf.m4 serial 10
dnl Copyright (C) 2003, 2007 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 Test whether the *printf family of functions supports 'long double'
+dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
+dnl Result is gl_cv_func_printf_long_double.
+
+AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports 'long double' arguments],
+ [gl_cv_func_printf_long_double],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+ buf[0] = '\0';
+ if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.750000 33") != 0)
+ return 1;
+ buf[0] = '\0';
+ if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.750000e+00 33") != 0)
+ return 1;
+ buf[0] = '\0';
+ if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
+ || strcmp (buf, "1.75 33") != 0)
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_long_double=yes], [gl_cv_func_printf_long_double=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ beos*) gl_cv_func_printf_long_double="guessing no";;
+ mingw* | pw*) gl_cv_func_printf_long_double="guessing no";;
+ *) gl_cv_func_printf_long_double="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl Test whether the *printf family of functions supports the 'a' and 'A'
dnl conversion specifier for hexadecimal output of floating-point numbers.
dnl (ISO C99, POSIX:2001)
])
])
+dnl Test whether the *printf family of functions supports POSIX/XSI format
+dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001)
+dnl Result is gl_cv_func_printf_flag_grouping.
+
+AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports the grouping flag],
+ [gl_cv_func_printf_flag_grouping],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+ if (sprintf (buf, "%'d %d", 1234567, 99) < 0
+ || buf[strlen (buf) - 1] != '9')
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_flag_grouping=yes], [gl_cv_func_printf_flag_grouping=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ cygwin*) gl_cv_func_printf_flag_grouping="guessing no";;
+ netbsd*) gl_cv_func_printf_flag_grouping="guessing no";;
+ mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";;
+ *) gl_cv_func_printf_flag_grouping="guessing yes";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
+dnl Test whether the *printf family of functions supports padding of non-finite
+dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
+dnl <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html>
+dnl Result is gl_cv_func_printf_flag_zero.
+
+AC_DEFUN([gl_PRINTF_FLAG_ZERO],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether printf supports the zero flag correctly],
+ [gl_cv_func_printf_flag_zero],
+ [
+ AC_TRY_RUN([
+#include <stdio.h>
+#include <string.h>
+static char buf[100];
+int main ()
+{
+ if (sprintf (buf, "%010f", 1.0 / 0.0, 33, 44, 55) < 0
+ || (strcmp (buf, " inf") != 0
+ && strcmp (buf, " infinity") != 0))
+ return 1;
+ return 0;
+}], [gl_cv_func_printf_flag_zero=yes], [gl_cv_func_printf_flag_zero=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
+ # Guess yes on BeOS.
+ beos*) gl_cv_func_printf_flag_zero="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_printf_flag_zero="guessing no";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
dnl Result is ac_cv_func_snprintf.
dnl Test whether the return value of the snprintf function is the number
dnl of bytes (excluding the terminating NUL) that would have been produced
dnl if the buffer had been large enough. (ISO C99, POSIX:2001)
+dnl For example, this test program fails on IRIX 6.5:
+dnl ---------------------------------------------------------------------
+dnl #include <stdio.h>
+dnl int main()
+dnl {
+dnl static char buf[8];
+dnl int retval = snprintf (buf, 3, "%d", 12345);
+dnl return retval >= 0 && retval < 3;
+dnl }
+dnl ---------------------------------------------------------------------
dnl Result is gl_cv_func_snprintf_retval_c99.
AC_DEFUN([gl_SNPRINTF_RETVAL_C99],
])
])
+dnl Test whether the vsnprintf function, when passed a zero size, produces no
+dnl output. (ISO C99, POSIX:2001)
+dnl For example, snprintf nevertheless writes a NUL byte in this case
+dnl on OSF/1 5.1:
+dnl ---------------------------------------------------------------------
+dnl #include <stdio.h>
+dnl int main()
+dnl {
+dnl static char buf[8] = "DEADBEEF";
+dnl snprintf (buf, 0, "%d", 12345);
+dnl return buf[0] != 'D';
+dnl }
+dnl ---------------------------------------------------------------------
+dnl And vsnprintf writes any output without bounds in this case, behaving like
+dnl vsprintf, on HP-UX 11 and OSF/1 5.1:
+dnl ---------------------------------------------------------------------
+dnl #include <stdarg.h>
+dnl #include <stdio.h>
+dnl static int my_snprintf (char *buf, int size, const char *format, ...)
+dnl {
+dnl va_list args;
+dnl int ret;
+dnl va_start (args, format);
+dnl ret = vsnprintf (buf, size, format, args);
+dnl va_end (args);
+dnl return ret;
+dnl }
+dnl int main()
+dnl {
+dnl static char buf[8] = "DEADBEEF";
+dnl my_snprintf (buf, 0, "%d", 12345);
+dnl return buf[0] != 'D';
+dnl }
+dnl ---------------------------------------------------------------------
+dnl Result is gl_cv_func_vsnprintf_zerosize_c99.
+
+AC_DEFUN([gl_VSNPRINTF_ZEROSIZE_C99],
+[
+ AC_REQUIRE([AC_PROG_CC])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CACHE_CHECK([whether vsnprintf respects a zero size as in C99],
+ [gl_cv_func_vsnprintf_zerosize_c99],
+ [
+ AC_TRY_RUN([
+#include <stdarg.h>
+#include <stdio.h>
+static int my_snprintf (char *buf, int size, const char *format, ...)
+{
+ va_list args;
+ int ret;
+ va_start (args, format);
+ ret = vsnprintf (buf, size, format, args);
+ va_end (args);
+ return ret;
+}
+int main()
+{
+ static char buf[8] = "DEADBEEF";
+ my_snprintf (buf, 0, "%d", 12345);
+ return buf[0] != 'D';
+}],
+ [gl_cv_func_vsnprintf_zerosize_c99=yes],
+ [gl_cv_func_vsnprintf_zerosize_c99=no],
+ [
+changequote(,)dnl
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on FreeBSD >= 5.
+ freebsd[1-4]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on MacOS X >= 10.3.
+ darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on Cygwin.
+ cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on Solaris >= 2.6.
+ solaris2.[0-5]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on AIX >= 4.
+ aix[1-3]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ aix*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on IRIX >= 6.5.
+ irix6.5) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on NetBSD >= 3.
+ netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
+ gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ netbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on BeOS.
+ beos*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # Guess yes on mingw.
+ mingw* | pw*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
+ esac
+changequote([,])dnl
+ ])
+ ])
+])
+
dnl The results of these tests on various platforms are:
dnl
dnl 1 = gl_PRINTF_SIZES_C99
-dnl 2 = gl_PRINTF_DIRECTIVE_A
-dnl 3 = gl_PRINTF_DIRECTIVE_F
-dnl 4 = gl_PRINTF_DIRECTIVE_N
-dnl 5 = gl_PRINTF_POSITIONS
-dnl 6 = gl_SNPRINTF_PRESENCE
-dnl 7 = gl_SNPRINTF_TRUNCATION_C99
-dnl 8 = gl_SNPRINTF_RETVAL_C99
-dnl 9 = gl_SNPRINTF_DIRECTIVE_N
+dnl 2 = gl_PRINTF_LONG_DOUBLE
+dnl 3 = gl_PRINTF_DIRECTIVE_A
+dnl 4 = gl_PRINTF_DIRECTIVE_F
+dnl 5 = gl_PRINTF_DIRECTIVE_N
+dnl 6 = gl_PRINTF_POSITIONS
+dnl 7 = gl_PRINTF_FLAG_GROUPING
+dnl 8 = gl_PRINTF_FLAG_ZERO
+dnl 9 = gl_SNPRINTF_PRESENCE
+dnl 10 = gl_SNPRINTF_TRUNCATION_C99
+dnl 11 = gl_SNPRINTF_RETVAL_C99
+dnl 12 = gl_SNPRINTF_DIRECTIVE_N
+dnl 13 = gl_VSNPRINTF_ZEROSIZE_C99
dnl
dnl 1 = checking whether printf supports size specifiers as in C99...
-dnl 2 = checking whether printf supports the 'a' and 'A' directives...
-dnl 3 = checking whether printf supports the 'F' directive...
-dnl 4 = checking whether printf supports the 'n' directive...
-dnl 5 = checking whether printf supports POSIX/XSI format strings with positions...
-dnl 6 = checking for snprintf...
-dnl 7 = checking whether snprintf truncates the result as in C99...
-dnl 8 = checking whether snprintf returns a byte count as in C99...
-dnl 9 = checking whether snprintf fully supports the 'n' directive...
+dnl 2 = checking whether printf supports 'long double' arguments...
+dnl 3 = checking whether printf supports the 'a' and 'A' directives...
+dnl 4 = checking whether printf supports the 'F' directive...
+dnl 5 = checking whether printf supports the 'n' directive...
+dnl 6 = checking whether printf supports POSIX/XSI format strings with positions...
+dnl 7 = checking whether printf supports the grouping flag...
+dnl 8 = checking whether printf supports the zero flag correctly...
+dnl 9 = checking for snprintf...
+dnl 10 = checking whether snprintf truncates the result as in C99...
+dnl 11 = checking whether snprintf returns a byte count as in C99...
+dnl 12 = checking whether snprintf fully supports the 'n' directive...
+dnl 13 = checking whether vsnprintf respects a zero size as in C99...
dnl
dnl . = yes, # = no.
dnl
-dnl 1 2 3 4 5 6 7 8 9
-dnl glibc 2.5 . . . . . . . . .
-dnl glibc 2.3.6 . # . . . . . . .
-dnl FreeBSD 5.4, 6.1 . ? . . . . . . .
-dnl MacOS X 10.3.9 . # . . . . . . .
-dnl OpenBSD 3.9, 4.0 . # ? . . . . . ?
-dnl Cygwin 2007 . # # . . . . . ?
-dnl Cygwin 2006 # # # . . . . . ?
-dnl Solaris 10 . # . . . . . . .
-dnl Solaris 2.6 ... 9 # # # . . . . . .
-dnl Solaris 2.5.1 # # # . . # # # #
-dnl AIX 5.2 . # . . . . . . .
-dnl AIX 4.3.2, 5.1 # # # . . . . . .
-dnl HP-UX 11.31 . # . . . . . # #
-dnl HP-UX 10.20, 11.00, 11.11, 11.23 # # # . . . . # #
-dnl IRIX 6.5 # # # . . . . # .
-dnl OSF/1 5.1 # # # . . . . # .
-dnl OSF/1 4.0d # # # . . # # # #
-dnl NetBSD 4.0 . ? ? . . . . . ?
-dnl NetBSD 3.0 . # # . # . . . .
-dnl BeOS # # # . # . . . .
-dnl mingw # # # . # . # # #
+dnl 1 2 3 4 5 6 7 8 9 10 11 12 13
+dnl glibc 2.5 . . . . . . . . . . . . .
+dnl glibc 2.3.6 . . # . . . . . . . . . .
+dnl FreeBSD 5.4, 6.1 . ? ? . . . . # . . . . .
+dnl MacOS X 10.3.9 . . # . . . . # . . . . .
+dnl OpenBSD 3.9, 4.0 . ? # ? . . ? ? . . . ? ?
+dnl Cygwin 2007 (= Cygwin 1.5.24) . ? # # . . . # . . . . .
+dnl Cygwin 2006 (= Cygwin 1.5.19) # ? # # . . # # . . . . .
+dnl Solaris 10 . . # . . . . # . . . . .
+dnl Solaris 2.6 ... 9 # . # # . . . # . . . . .
+dnl Solaris 2.5.1 # . # # . . . # # # # # #
+dnl AIX 5.2 . . # . . . . # . . . . .
+dnl AIX 4.3.2, 5.1 # . # # . . . # . . . . .
+dnl HP-UX 11.31 . . # . . . . # . . # # .
+dnl HP-UX 10.20, 11.00, 11.11, 11.23 # . # # . . . # . . # # #
+dnl IRIX 6.5 # . # # . . . # . . # . .
+dnl OSF/1 5.1 # . # # . . . # . . # . #
+dnl OSF/1 4.0d # . # # . . . # # # # # #
+dnl NetBSD 4.0 . ? ? ? . . ? ? . . . ? ?
+dnl NetBSD 3.0 . ? # # . # # # . . . . .
+dnl BeOS # # # # . # . . . . . . .
+dnl mingw # # # # . # # # . # # # .
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