1729 lines
70 KiB
Plaintext
1729 lines
70 KiB
Plaintext
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# printf.m4 serial 73
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dnl Copyright (C) 2003, 2007-2023 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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dnl Test whether the *printf family of functions supports the 'j', 'z', 't',
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dnl 'L' size specifiers. (ISO C99, POSIX:2001)
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dnl Result is gl_cv_func_printf_sizes_c99.
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AC_DEFUN([gl_PRINTF_SIZES_C99],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([gl_AC_HEADER_STDINT_H])
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AC_REQUIRE([gl_AC_HEADER_INTTYPES_H])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether printf supports size specifiers as in C99],
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[gl_cv_func_printf_sizes_c99],
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[
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <stddef.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/types.h>
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#if HAVE_STDINT_H_WITH_UINTMAX
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# include <stdint.h>
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#endif
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#if HAVE_INTTYPES_H_WITH_UINTMAX
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# include <inttypes.h>
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#endif
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static char buf[100];
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int main ()
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{
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int result = 0;
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#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX
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buf[0] = '\0';
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if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0
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|| strcmp (buf, "12345671 33") != 0)
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result |= 1;
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#else
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result |= 1;
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#endif
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buf[0] = '\0';
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if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0
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|| strcmp (buf, "12345672 33") != 0)
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result |= 2;
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buf[0] = '\0';
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if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0
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|| strcmp (buf, "12345673 33") != 0)
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result |= 4;
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buf[0] = '\0';
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if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0
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|| strcmp (buf, "1.5 33") != 0)
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result |= 8;
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return result;
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}]])],
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[gl_cv_func_printf_sizes_c99=yes],
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[gl_cv_func_printf_sizes_c99=no],
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[
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case "$host_os" in
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changequote(,)dnl
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# Guess yes on glibc systems.
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*-gnu* | gnu*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on FreeBSD >= 5.
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freebsd[1-4].*) gl_cv_func_printf_sizes_c99="guessing no";;
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freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
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midnightbsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on Mac OS X >= 10.3.
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darwin[1-6].*) gl_cv_func_printf_sizes_c99="guessing no";;
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darwin*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on OpenBSD >= 3.9.
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openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
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gl_cv_func_printf_sizes_c99="guessing no";;
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openbsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on Solaris >= 2.10.
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solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
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solaris*) gl_cv_func_printf_sizes_c99="guessing no";;
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# Guess yes on NetBSD >= 3.
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netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
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gl_cv_func_printf_sizes_c99="guessing no";;
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netbsd*) gl_cv_func_printf_sizes_c99="guessing yes";;
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# Guess yes on Android.
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linux*-android*) gl_cv_func_printf_sizes_c99="guessing yes";;
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changequote([,])dnl
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# Guess yes on MSVC, no on mingw.
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mingw*) AC_EGREP_CPP([Known], [
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#ifdef _MSC_VER
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Known
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#endif
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],
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[gl_cv_func_printf_sizes_c99="guessing yes"],
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[gl_cv_func_printf_sizes_c99="guessing no"])
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;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_printf_sizes_c99="$gl_cross_guess_normal";;
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esac
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])
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])
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])
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dnl Test whether the *printf family of functions supports 'long double'
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dnl arguments together with the 'L' size specifier. (ISO C99, POSIX:2001)
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dnl Result is gl_cv_func_printf_long_double.
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AC_DEFUN([gl_PRINTF_LONG_DOUBLE],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether printf supports 'long double' arguments],
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[gl_cv_func_printf_long_double],
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[
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <stdio.h>
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#include <string.h>
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static char buf[10000];
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int main ()
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{
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int result = 0;
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buf[0] = '\0';
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if (sprintf (buf, "%Lf %d", 1.75L, 33, 44, 55) < 0
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|| strcmp (buf, "1.750000 33") != 0)
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result |= 1;
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buf[0] = '\0';
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if (sprintf (buf, "%Le %d", 1.75L, 33, 44, 55) < 0
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|| strcmp (buf, "1.750000e+00 33") != 0)
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result |= 2;
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buf[0] = '\0';
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if (sprintf (buf, "%Lg %d", 1.75L, 33, 44, 55) < 0
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|| strcmp (buf, "1.75 33") != 0)
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result |= 4;
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return result;
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}]])],
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[gl_cv_func_printf_long_double=yes],
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[gl_cv_func_printf_long_double=no],
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[case "$host_os" in
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# Guess no on BeOS.
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beos*) gl_cv_func_printf_long_double="guessing no";;
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# Guess yes on Android.
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linux*-android*) gl_cv_func_printf_long_double="guessing yes";;
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# Guess yes on MSVC, no on mingw.
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mingw*) AC_EGREP_CPP([Known], [
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#ifdef _MSC_VER
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Known
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#endif
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],
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[gl_cv_func_printf_long_double="guessing yes"],
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[gl_cv_func_printf_long_double="guessing no"])
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;;
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*) gl_cv_func_printf_long_double="guessing yes";;
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esac
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])
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])
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])
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dnl Test whether the *printf family of functions supports infinite and NaN
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dnl 'double' arguments and negative zero arguments in the %f, %e, %g
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dnl directives. (ISO C99, POSIX:2001)
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dnl Result is gl_cv_func_printf_infinite.
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AC_DEFUN([gl_PRINTF_INFINITE],
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[
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AC_REQUIRE([AC_PROG_CC])
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AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
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AC_CACHE_CHECK([whether printf supports infinite 'double' arguments],
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[gl_cv_func_printf_infinite],
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[
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AC_RUN_IFELSE(
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[AC_LANG_SOURCE([[
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#include <stdio.h>
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#include <string.h>
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static int
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strisnan (const char *string, size_t start_index, size_t end_index)
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{
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if (start_index < end_index)
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{
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if (string[start_index] == '-')
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start_index++;
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if (start_index + 3 <= end_index
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&& memcmp (string + start_index, "nan", 3) == 0)
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{
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start_index += 3;
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if (start_index == end_index
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|| (string[start_index] == '(' && string[end_index - 1] == ')'))
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return 1;
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}
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}
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return 0;
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}
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static int
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have_minus_zero ()
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{
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static double plus_zero = 0.0;
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double minus_zero = - plus_zero;
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return memcmp (&plus_zero, &minus_zero, sizeof (double)) != 0;
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}
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static char buf[10000];
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static double zero = 0.0;
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int main ()
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{
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int result = 0;
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if (sprintf (buf, "%f", 1.0 / zero) < 0
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|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
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result |= 1;
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if (sprintf (buf, "%f", -1.0 / zero) < 0
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|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
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result |= 1;
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if (sprintf (buf, "%f", zero / zero) < 0
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|| !strisnan (buf, 0, strlen (buf)))
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result |= 2;
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if (sprintf (buf, "%e", 1.0 / zero) < 0
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|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
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result |= 4;
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if (sprintf (buf, "%e", -1.0 / zero) < 0
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|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
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result |= 4;
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if (sprintf (buf, "%e", zero / zero) < 0
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|| !strisnan (buf, 0, strlen (buf)))
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result |= 8;
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if (sprintf (buf, "%g", 1.0 / zero) < 0
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|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
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result |= 16;
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if (sprintf (buf, "%g", -1.0 / zero) < 0
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|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
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result |= 16;
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if (sprintf (buf, "%g", zero / zero) < 0
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|| !strisnan (buf, 0, strlen (buf)))
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result |= 32;
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/* This test fails on HP-UX 10.20. */
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if (have_minus_zero ())
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if (sprintf (buf, "%g", - zero) < 0
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|| strcmp (buf, "-0") != 0)
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result |= 64;
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return result;
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}]])],
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[gl_cv_func_printf_infinite=yes],
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[gl_cv_func_printf_infinite=no],
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[
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case "$host_os" in
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changequote(,)dnl
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# Guess yes on glibc systems.
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|
*-gnu* | gnu*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on musl systems.
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*-musl*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on FreeBSD >= 6.
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freebsd[1-5].*) gl_cv_func_printf_infinite="guessing no";;
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freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";;
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midnightbsd*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on Mac OS X >= 10.3.
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darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";;
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darwin*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on HP-UX >= 11.
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hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";;
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hpux*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on NetBSD >= 3.
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netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
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gl_cv_func_printf_infinite="guessing no";;
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netbsd*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on OpenBSD >= 6.0.
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openbsd[1-5].*) gl_cv_func_printf_infinite="guessing no";;
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openbsd*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess yes on BeOS.
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beos*) gl_cv_func_printf_infinite="guessing yes";;
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# Guess no on Android.
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|
linux*-android*) gl_cv_func_printf_infinite="guessing no";;
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changequote([,])dnl
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# Guess yes on MSVC, no on mingw.
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mingw*) AC_EGREP_CPP([Known], [
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#ifdef _MSC_VER
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|
Known
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|
#endif
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|
],
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[gl_cv_func_printf_infinite="guessing yes"],
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[gl_cv_func_printf_infinite="guessing no"])
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;;
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# If we don't know, obey --enable-cross-guesses.
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*) gl_cv_func_printf_infinite="$gl_cross_guess_normal";;
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esac
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|
])
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|
])
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|
])
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|
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|
dnl Test whether the *printf family of functions supports infinite and NaN
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|
dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001)
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|
dnl Result is gl_cv_func_printf_infinite_long_double.
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|
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AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE],
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|
[
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AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])
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AC_REQUIRE([AC_PROG_CC])
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|
AC_REQUIRE([gl_BIGENDIAN])
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|
AC_REQUIRE([gl_LONG_DOUBLE_VS_DOUBLE])
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|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
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|
dnl The user can set or unset the variable gl_printf_safe to indicate
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|
dnl that he wishes a safe handling of non-IEEE-754 'long double' values.
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|
if test -n "$gl_printf_safe"; then
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|
AC_DEFINE([CHECK_PRINTF_SAFE], [1],
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|
[Define if you wish *printf() functions that have a safe handling of
|
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|
non-IEEE-754 'long double' values.])
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|
fi
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|
case "$gl_cv_func_printf_long_double" in
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*yes)
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AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments],
|
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|
[gl_cv_func_printf_infinite_long_double],
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|
[
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|
AC_RUN_IFELSE(
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|
[AC_LANG_SOURCE([[
|
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|
]GL_NOCRASH[
|
||
|
#include <float.h>
|
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|
#include <stdio.h>
|
||
|
#include <string.h>
|
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|
static int
|
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|
strisnan (const char *string, size_t start_index, size_t end_index)
|
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|
{
|
||
|
if (start_index < end_index)
|
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|
{
|
||
|
if (string[start_index] == '-')
|
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|
start_index++;
|
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|
if (start_index + 3 <= end_index
|
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|
&& memcmp (string + start_index, "nan", 3) == 0)
|
||
|
{
|
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|
start_index += 3;
|
||
|
if (start_index == end_index
|
||
|
|| (string[start_index] == '(' && string[end_index - 1] == ')'))
|
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|
return 1;
|
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|
}
|
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|
}
|
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|
return 0;
|
||
|
}
|
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|
static char buf[10000];
|
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|
static long double zeroL = 0.0L;
|
||
|
int main ()
|
||
|
{
|
||
|
int result = 0;
|
||
|
nocrash_init();
|
||
|
if (sprintf (buf, "%Lf", 1.0L / zeroL) < 0
|
||
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|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
|
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|
result |= 1;
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|
if (sprintf (buf, "%Lf", -1.0L / zeroL) < 0
|
||
|
|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
|
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|
result |= 1;
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||
|
if (sprintf (buf, "%Lf", zeroL / zeroL) < 0
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|| !strisnan (buf, 0, strlen (buf)))
|
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|
result |= 1;
|
||
|
if (sprintf (buf, "%Le", 1.0L / zeroL) < 0
|
||
|
|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%Le", -1.0L / zeroL) < 0
|
||
|
|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%Le", zeroL / zeroL) < 0
|
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|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%Lg", 1.0L / zeroL) < 0
|
||
|
|| (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%Lg", -1.0L / zeroL) < 0
|
||
|
|| (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%Lg", zeroL / zeroL) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 1;
|
||
|
#if CHECK_PRINTF_SAFE && ((defined __ia64 && LDBL_MANT_DIG == 64) || (defined __x86_64__ || defined __amd64__) || (defined __i386 || defined __i386__ || defined _I386 || defined _M_IX86 || defined _X86_)) && !HAVE_SAME_LONG_DOUBLE_AS_DOUBLE
|
||
|
/* Representation of an 80-bit 'long double' as an initializer for a sequence
|
||
|
of 'unsigned int' words. */
|
||
|
# ifdef WORDS_BIGENDIAN
|
||
|
# define LDBL80_WORDS(exponent,manthi,mantlo) \
|
||
|
{ ((unsigned int) (exponent) << 16) | ((unsigned int) (manthi) >> 16), \
|
||
|
((unsigned int) (manthi) << 16) | ((unsigned int) (mantlo) >> 16), \
|
||
|
(unsigned int) (mantlo) << 16 \
|
||
|
}
|
||
|
# else
|
||
|
# define LDBL80_WORDS(exponent,manthi,mantlo) \
|
||
|
{ mantlo, manthi, exponent }
|
||
|
# endif
|
||
|
{ /* Quiet NaN. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0xFFFF, 0xC3333333, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
if (sprintf (buf, "%Le", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
if (sprintf (buf, "%Lg", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
}
|
||
|
{
|
||
|
/* Signalling NaN. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0xFFFF, 0x83333333, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
if (sprintf (buf, "%Le", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
if (sprintf (buf, "%Lg", x.value) < 0
|
||
|
|| !strisnan (buf, 0, strlen (buf)))
|
||
|
result |= 2;
|
||
|
}
|
||
|
{ /* Pseudo-NaN. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) <= 0)
|
||
|
result |= 4;
|
||
|
if (sprintf (buf, "%Le", x.value) <= 0)
|
||
|
result |= 4;
|
||
|
if (sprintf (buf, "%Lg", x.value) <= 0)
|
||
|
result |= 4;
|
||
|
}
|
||
|
{ /* Pseudo-Infinity. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) <= 0)
|
||
|
result |= 8;
|
||
|
if (sprintf (buf, "%Le", x.value) <= 0)
|
||
|
result |= 8;
|
||
|
if (sprintf (buf, "%Lg", x.value) <= 0)
|
||
|
result |= 8;
|
||
|
}
|
||
|
{ /* Pseudo-Zero. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) <= 0)
|
||
|
result |= 16;
|
||
|
if (sprintf (buf, "%Le", x.value) <= 0)
|
||
|
result |= 16;
|
||
|
if (sprintf (buf, "%Lg", x.value) <= 0)
|
||
|
result |= 16;
|
||
|
}
|
||
|
{ /* Unnormalized number. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) <= 0)
|
||
|
result |= 32;
|
||
|
if (sprintf (buf, "%Le", x.value) <= 0)
|
||
|
result |= 32;
|
||
|
if (sprintf (buf, "%Lg", x.value) <= 0)
|
||
|
result |= 32;
|
||
|
}
|
||
|
{ /* Pseudo-Denormal. */
|
||
|
static union { unsigned int word[4]; long double value; } x =
|
||
|
{ LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) };
|
||
|
if (sprintf (buf, "%Lf", x.value) <= 0)
|
||
|
result |= 64;
|
||
|
if (sprintf (buf, "%Le", x.value) <= 0)
|
||
|
result |= 64;
|
||
|
if (sprintf (buf, "%Lg", x.value) <= 0)
|
||
|
result |= 64;
|
||
|
}
|
||
|
#endif
|
||
|
return result;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_infinite_long_double=yes],
|
||
|
[gl_cv_func_printf_infinite_long_double=no],
|
||
|
[case "$host_cpu" in
|
||
|
# Guess no on ia64, x86_64, i386.
|
||
|
ia64 | x86_64 | i*86) gl_cv_func_printf_infinite_long_double="guessing no";;
|
||
|
*)
|
||
|
case "$host_os" in
|
||
|
changequote(,)dnl
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 6.
|
||
|
freebsd[1-5].*) gl_cv_func_printf_infinite_long_double="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
# Guess yes on HP-UX >= 11.
|
||
|
hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite_long_double="guessing no";;
|
||
|
hpux*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
# Guess yes on OpenBSD >= 6.0.
|
||
|
openbsd[1-5].*) gl_cv_func_printf_infinite_long_double="guessing no";;
|
||
|
openbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_infinite_long_double="guessing no";;
|
||
|
changequote([,])dnl
|
||
|
# Guess yes on MSVC, no on mingw.
|
||
|
mingw*) AC_EGREP_CPP([Known], [
|
||
|
#ifdef _MSC_VER
|
||
|
Known
|
||
|
#endif
|
||
|
],
|
||
|
[gl_cv_func_printf_infinite_long_double="guessing yes"],
|
||
|
[gl_cv_func_printf_infinite_long_double="guessing no"])
|
||
|
;;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_printf_infinite_long_double="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
;;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
;;
|
||
|
*)
|
||
|
gl_cv_func_printf_infinite_long_double="irrelevant"
|
||
|
;;
|
||
|
esac
|
||
|
])
|
||
|
|
||
|
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 Result is gl_cv_func_printf_directive_a.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_DIRECTIVE_A],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the 'a' and 'A' directives],
|
||
|
[gl_cv_func_printf_directive_a],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[100];
|
||
|
static double zero = 0.0;
|
||
|
int main ()
|
||
|
{
|
||
|
int result = 0;
|
||
|
if (sprintf (buf, "%a %d", 3.1416015625, 33, 44, 55) < 0
|
||
|
|| (strcmp (buf, "0x1.922p+1 33") != 0
|
||
|
&& strcmp (buf, "0x3.244p+0 33") != 0
|
||
|
&& strcmp (buf, "0x6.488p-1 33") != 0
|
||
|
&& strcmp (buf, "0xc.91p-2 33") != 0))
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%A %d", -3.1416015625, 33, 44, 55) < 0
|
||
|
|| (strcmp (buf, "-0X1.922P+1 33") != 0
|
||
|
&& strcmp (buf, "-0X3.244P+0 33") != 0
|
||
|
&& strcmp (buf, "-0X6.488P-1 33") != 0
|
||
|
&& strcmp (buf, "-0XC.91P-2 33") != 0))
|
||
|
result |= 2;
|
||
|
/* This catches a FreeBSD 13.0 bug: it doesn't round. */
|
||
|
if (sprintf (buf, "%.2a %d", 1.51, 33, 44, 55) < 0
|
||
|
|| (strcmp (buf, "0x1.83p+0 33") != 0
|
||
|
&& strcmp (buf, "0x3.05p-1 33") != 0
|
||
|
&& strcmp (buf, "0x6.0ap-2 33") != 0
|
||
|
&& strcmp (buf, "0xc.14p-3 33") != 0))
|
||
|
result |= 4;
|
||
|
/* This catches a Mac OS X 10.12.4 (Darwin 16.5) bug: it doesn't round. */
|
||
|
if (sprintf (buf, "%.0a %d", 1.51, 33, 44, 55) < 0
|
||
|
|| (strcmp (buf, "0x2p+0 33") != 0
|
||
|
&& strcmp (buf, "0x3p-1 33") != 0
|
||
|
&& strcmp (buf, "0x6p-2 33") != 0
|
||
|
&& strcmp (buf, "0xcp-3 33") != 0))
|
||
|
result |= 4;
|
||
|
/* This catches a FreeBSD 6.1 bug. See
|
||
|
<https://lists.gnu.org/r/bug-gnulib/2007-04/msg00107.html> */
|
||
|
if (sprintf (buf, "%010a %d", 1.0 / zero, 33, 44, 55) < 0
|
||
|
|| buf[0] == '0')
|
||
|
result |= 8;
|
||
|
/* This catches a Mac OS X 10.3.9 (Darwin 7.9) bug. */
|
||
|
if (sprintf (buf, "%.1a", 1.999) < 0
|
||
|
|| (strcmp (buf, "0x1.0p+1") != 0
|
||
|
&& strcmp (buf, "0x2.0p+0") != 0
|
||
|
&& strcmp (buf, "0x4.0p-1") != 0
|
||
|
&& strcmp (buf, "0x8.0p-2") != 0))
|
||
|
result |= 16;
|
||
|
/* This catches the same Mac OS X 10.3.9 (Darwin 7.9) bug and also a
|
||
|
glibc 2.4 bug <https://sourceware.org/bugzilla/show_bug.cgi?id=2908>. */
|
||
|
if (sprintf (buf, "%.1La", 1.999L) < 0
|
||
|
|| (strcmp (buf, "0x1.0p+1") != 0
|
||
|
&& strcmp (buf, "0x2.0p+0") != 0
|
||
|
&& strcmp (buf, "0x4.0p-1") != 0
|
||
|
&& strcmp (buf, "0x8.0p-2") != 0))
|
||
|
result |= 32;
|
||
|
return result;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_directive_a=yes],
|
||
|
[gl_cv_func_printf_directive_a=no],
|
||
|
[
|
||
|
case "$host_os" in
|
||
|
# Guess yes on glibc >= 2.5 systems.
|
||
|
*-gnu* | gnu*)
|
||
|
AC_EGREP_CPP([BZ2908], [
|
||
|
#include <features.h>
|
||
|
#ifdef __GNU_LIBRARY__
|
||
|
#if ((__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2)) && !defined __UCLIBC__
|
||
|
BZ2908
|
||
|
#endif
|
||
|
#endif
|
||
|
],
|
||
|
[gl_cv_func_printf_directive_a="guessing yes"],
|
||
|
[gl_cv_func_printf_directive_a="guessing no"])
|
||
|
;;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_printf_directive_a="guessing yes";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_directive_a="guessing no";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw*) gl_cv_func_printf_directive_a="guessing no";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_printf_directive_a="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports the %F format
|
||
|
dnl directive. (ISO C99, POSIX:2001)
|
||
|
dnl Result is gl_cv_func_printf_directive_f.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_DIRECTIVE_F],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the 'F' directive],
|
||
|
[gl_cv_func_printf_directive_f],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[100];
|
||
|
static double zero = 0.0;
|
||
|
int main ()
|
||
|
{
|
||
|
int result = 0;
|
||
|
if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0
|
||
|
|| strcmp (buf, "1234567.000000 33") != 0)
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%F", 1.0 / zero) < 0
|
||
|
|| (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0))
|
||
|
result |= 2;
|
||
|
/* This catches a Cygwin 1.5.x bug. */
|
||
|
if (sprintf (buf, "%.F", 1234.0) < 0
|
||
|
|| strcmp (buf, "1234") != 0)
|
||
|
result |= 4;
|
||
|
return result;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_directive_f=yes],
|
||
|
[gl_cv_func_printf_directive_f=no],
|
||
|
[
|
||
|
case "$host_os" in
|
||
|
changequote(,)dnl
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 6.
|
||
|
freebsd[1-5].*) gl_cv_func_printf_directive_f="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
# Guess yes on Mac OS X >= 10.3.
|
||
|
darwin[1-6].*) gl_cv_func_printf_directive_f="guessing no";;
|
||
|
darwin*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
# Guess yes on OpenBSD >= 6.0.
|
||
|
openbsd[1-5].*) gl_cv_func_printf_directive_f="guessing no";;
|
||
|
openbsd*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
# Guess yes on Solaris >= 2.10.
|
||
|
solaris2.[1-9][0-9]*) gl_cv_func_printf_directive_f="guessing yes";;
|
||
|
solaris*) gl_cv_func_printf_directive_f="guessing no";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_directive_f="guessing no";;
|
||
|
changequote([,])dnl
|
||
|
# Guess yes on MSVC, no on mingw.
|
||
|
mingw*) AC_EGREP_CPP([Known], [
|
||
|
#ifdef _MSC_VER
|
||
|
Known
|
||
|
#endif
|
||
|
],
|
||
|
[gl_cv_func_printf_directive_f="guessing yes"],
|
||
|
[gl_cv_func_printf_directive_f="guessing no"])
|
||
|
;;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_printf_directive_f="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports the %n format
|
||
|
dnl directive. (ISO C99, POSIX:2001)
|
||
|
dnl Result is gl_cv_func_printf_directive_n.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_DIRECTIVE_N],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the 'n' directive],
|
||
|
[gl_cv_func_printf_directive_n],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <stdlib.h>
|
||
|
#include <string.h>
|
||
|
#ifdef _MSC_VER
|
||
|
#include <inttypes.h>
|
||
|
/* See page about "Parameter Validation" on msdn.microsoft.com.
|
||
|
<https://docs.microsoft.com/en-us/cpp/c-runtime-library/parameter-validation>
|
||
|
<https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/set-invalid-parameter-handler-set-thread-local-invalid-parameter-handler> */
|
||
|
static void cdecl
|
||
|
invalid_parameter_handler (const wchar_t *expression,
|
||
|
const wchar_t *function,
|
||
|
const wchar_t *file, unsigned int line,
|
||
|
uintptr_t dummy)
|
||
|
{
|
||
|
exit (1);
|
||
|
}
|
||
|
#endif
|
||
|
static char fmtstring[10];
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
int count = -1;
|
||
|
#ifdef _MSC_VER
|
||
|
_set_invalid_parameter_handler (invalid_parameter_handler);
|
||
|
#endif
|
||
|
/* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
|
||
|
support %n in format strings in read-only memory but not in writable
|
||
|
memory. */
|
||
|
strcpy (fmtstring, "%d %n");
|
||
|
if (sprintf (buf, fmtstring, 123, &count, 33, 44, 55) < 0
|
||
|
|| strcmp (buf, "123 ") != 0
|
||
|
|| count != 4)
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_directive_n=yes],
|
||
|
[gl_cv_func_printf_directive_n=no],
|
||
|
[case "$host_os" in
|
||
|
# Guess no on glibc when _FORTIFY_SOURCE >= 2.
|
||
|
*-gnu* | gnu*) AC_COMPILE_IFELSE(
|
||
|
[AC_LANG_SOURCE(
|
||
|
[[#if _FORTIFY_SOURCE >= 2
|
||
|
error fail
|
||
|
#endif
|
||
|
]])],
|
||
|
[gl_cv_func_printf_directive_n="guessing yes"],
|
||
|
[gl_cv_func_printf_directive_n="guessing no"])
|
||
|
;;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_directive_n="guessing no";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw*) gl_cv_func_printf_directive_n="guessing no";;
|
||
|
*) gl_cv_func_printf_directive_n="guessing yes";;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports the %ls format
|
||
|
dnl directive and in particular, when a precision is specified, whether
|
||
|
dnl the functions stop converting the wide string argument when the number
|
||
|
dnl of bytes that have been produced by this conversion equals or exceeds
|
||
|
dnl the precision.
|
||
|
dnl Result is gl_cv_func_printf_directive_ls.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_DIRECTIVE_LS],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the 'ls' directive],
|
||
|
[gl_cv_func_printf_directive_ls],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <wchar.h>
|
||
|
#include <string.h>
|
||
|
int main ()
|
||
|
{
|
||
|
int result = 0;
|
||
|
char buf[100];
|
||
|
/* Test whether %ls works at all.
|
||
|
This test fails on OpenBSD 4.0, IRIX 6.5, Solaris 2.6, Haiku, but not on
|
||
|
Cygwin 1.5. */
|
||
|
{
|
||
|
static const wchar_t wstring[] = { 'a', 'b', 'c', 0 };
|
||
|
buf[0] = '\0';
|
||
|
if (sprintf (buf, "%ls", wstring) < 0
|
||
|
|| strcmp (buf, "abc") != 0)
|
||
|
result |= 1;
|
||
|
}
|
||
|
/* This test fails on IRIX 6.5, Solaris 2.6, Cygwin 1.5, Haiku (with an
|
||
|
assertion failure inside libc), but not on OpenBSD 4.0. */
|
||
|
{
|
||
|
static const wchar_t wstring[] = { 'a', 0 };
|
||
|
buf[0] = '\0';
|
||
|
if (sprintf (buf, "%ls", wstring) < 0
|
||
|
|| strcmp (buf, "a") != 0)
|
||
|
result |= 2;
|
||
|
}
|
||
|
/* Test whether precisions in %ls are supported as specified in ISO C 99
|
||
|
section 7.19.6.1:
|
||
|
"If a precision is specified, no more than that many bytes are written
|
||
|
(including shift sequences, if any), and the array shall contain a
|
||
|
null wide character if, to equal the multibyte character sequence
|
||
|
length given by the precision, the function would need to access a
|
||
|
wide character one past the end of the array."
|
||
|
This test fails on Solaris 10. */
|
||
|
{
|
||
|
static const wchar_t wstring[] = { 'a', 'b', (wchar_t) 0xfdfdfdfd, 0 };
|
||
|
buf[0] = '\0';
|
||
|
if (sprintf (buf, "%.2ls", wstring) < 0
|
||
|
|| strcmp (buf, "ab") != 0)
|
||
|
result |= 8;
|
||
|
}
|
||
|
return result;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_directive_ls=yes],
|
||
|
[gl_cv_func_printf_directive_ls=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess yes on OpenBSD >= 6.0.
|
||
|
openbsd[1-5].*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
openbsd*) gl_cv_func_printf_directive_ls="guessing yes";;
|
||
|
irix*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
solaris*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
cygwin*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
beos* | haiku*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_directive_ls="guessing no";;
|
||
|
# Guess yes on native Windows.
|
||
|
mingw*) gl_cv_func_printf_directive_ls="guessing yes";;
|
||
|
*) gl_cv_func_printf_directive_ls="guessing yes";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports POSIX/XSI format
|
||
|
dnl strings with positions. (POSIX:2001)
|
||
|
dnl Result is gl_cv_func_printf_positions.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_POSITIONS],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions],
|
||
|
[gl_cv_func_printf_positions],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
/* The string "%2$d %1$d", with dollar characters protected from the shell's
|
||
|
dollar expansion (possibly an autoconf bug). */
|
||
|
static char format[] = { '%', '2', '$', 'd', ' ', '%', '1', '$', 'd', '\0' };
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
sprintf (buf, format, 33, 55);
|
||
|
return (strcmp (buf, "55 33") != 0);
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_positions=yes],
|
||
|
[gl_cv_func_printf_positions=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
netbsd[1-3]* | netbsdelf[1-3]* | netbsdaout[1-3]* | netbsdcoff[1-3]*)
|
||
|
gl_cv_func_printf_positions="guessing no";;
|
||
|
beos*) gl_cv_func_printf_positions="guessing no";;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_printf_positions="guessing yes";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw* | pw*) gl_cv_func_printf_positions="guessing no";;
|
||
|
*) gl_cv_func_printf_positions="guessing yes";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports POSIX/XSI format
|
||
|
dnl strings with the ' flag for grouping of decimal digits. (POSIX:2001)
|
||
|
dnl Result is gl_cv_func_printf_flag_grouping.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_FLAG_GROUPING],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the grouping flag],
|
||
|
[gl_cv_func_printf_flag_grouping],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
if (sprintf (buf, "%'d %d", 1234567, 99) < 0
|
||
|
|| buf[strlen (buf) - 1] != '9')
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_flag_grouping=yes],
|
||
|
[gl_cv_func_printf_flag_grouping=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
cygwin*) gl_cv_func_printf_flag_grouping="guessing no";;
|
||
|
netbsd*) gl_cv_func_printf_flag_grouping="guessing no";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_flag_grouping="guessing no";;
|
||
|
# Guess no on native Windows.
|
||
|
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 the - flag correctly.
|
||
|
dnl (ISO C99.) See
|
||
|
dnl <https://lists.gnu.org/r/bug-coreutils/2008-02/msg00035.html>
|
||
|
dnl Result is gl_cv_func_printf_flag_leftadjust.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly],
|
||
|
[gl_cv_func_printf_flag_leftadjust],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
/* Check that a '-' flag is not annihilated by a negative width. */
|
||
|
if (sprintf (buf, "a%-*sc", -3, "b") < 0
|
||
|
|| strcmp (buf, "ab c") != 0)
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_flag_leftadjust=yes],
|
||
|
[gl_cv_func_printf_flag_leftadjust=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess yes on HP-UX 11.
|
||
|
hpux11*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
|
||
|
# Guess no on HP-UX 10 and older.
|
||
|
hpux*) gl_cv_func_printf_flag_leftadjust="guessing no";;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
|
||
|
# Guess yes on native Windows.
|
||
|
mingw*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
|
||
|
# Guess yes otherwise.
|
||
|
*) gl_cv_func_printf_flag_leftadjust="guessing yes";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports padding of non-finite
|
||
|
dnl values with the 0 flag correctly. (ISO C99 + TC1 + TC2.) See
|
||
|
dnl <https://lists.gnu.org/r/bug-gnulib/2007-04/msg00107.html>
|
||
|
dnl Result is gl_cv_func_printf_flag_zero.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_FLAG_ZERO],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports the zero flag correctly],
|
||
|
[gl_cv_func_printf_flag_zero],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[100];
|
||
|
static double zero = 0.0;
|
||
|
int main ()
|
||
|
{
|
||
|
if (sprintf (buf, "%010f", 1.0 / zero, 33, 44, 55) < 0
|
||
|
|| (strcmp (buf, " inf") != 0
|
||
|
&& strcmp (buf, " infinity") != 0))
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_flag_zero=yes],
|
||
|
[gl_cv_func_printf_flag_zero=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_printf_flag_zero="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_printf_flag_zero="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_printf_flag_zero="guessing yes";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_flag_zero="guessing no";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw*) gl_cv_func_printf_flag_zero="guessing no";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_printf_flag_zero="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions supports large precisions.
|
||
|
dnl On mingw, precisions larger than 512 are treated like 512, in integer,
|
||
|
dnl floating-point or pointer output. On Solaris 10/x86, precisions larger
|
||
|
dnl than 510 in floating-point output crash the program. On Solaris 10/SPARC,
|
||
|
dnl precisions larger than 510 in floating-point output yield wrong results.
|
||
|
dnl On AIX 7.1, precisions larger than 998 in floating-point output yield
|
||
|
dnl wrong results. On BeOS, precisions larger than 1044 crash the program.
|
||
|
dnl Result is gl_cv_func_printf_precision.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_PRECISION],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf supports large precisions],
|
||
|
[gl_cv_func_printf_precision],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
static char buf[5000];
|
||
|
int main ()
|
||
|
{
|
||
|
int result = 0;
|
||
|
#ifdef __BEOS__
|
||
|
/* On BeOS, this would crash and show a dialog box. Avoid the crash. */
|
||
|
return 1;
|
||
|
#endif
|
||
|
if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3)
|
||
|
result |= 1;
|
||
|
if (sprintf (buf, "%.4000f %d", 1.0, 33, 44) < 4000 + 5)
|
||
|
result |= 2;
|
||
|
if (sprintf (buf, "%.511f %d", 1.0, 33, 44) < 511 + 5
|
||
|
|| buf[0] != '1')
|
||
|
result |= 4;
|
||
|
if (sprintf (buf, "%.999f %d", 1.0, 33, 44) < 999 + 5
|
||
|
|| buf[0] != '1')
|
||
|
result |= 4;
|
||
|
return result;
|
||
|
}]])],
|
||
|
[gl_cv_func_printf_precision=yes],
|
||
|
[gl_cv_func_printf_precision=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess no only on Solaris, native Windows, and BeOS systems.
|
||
|
solaris*) gl_cv_func_printf_precision="guessing no" ;;
|
||
|
mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;;
|
||
|
beos*) gl_cv_func_printf_precision="guessing no" ;;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_printf_precision="guessing yes" ;;
|
||
|
*) gl_cv_func_printf_precision="guessing yes" ;;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the *printf family of functions recovers gracefully in case
|
||
|
dnl of an out-of-memory condition, or whether it crashes the entire program.
|
||
|
dnl Result is gl_cv_func_printf_enomem.
|
||
|
|
||
|
AC_DEFUN([gl_PRINTF_ENOMEM],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([gl_MULTIARCH])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_CACHE_CHECK([whether printf survives out-of-memory conditions],
|
||
|
[gl_cv_func_printf_enomem],
|
||
|
[
|
||
|
gl_cv_func_printf_enomem="guessing no"
|
||
|
if test "$cross_compiling" = no; then
|
||
|
if test $APPLE_UNIVERSAL_BUILD = 0; then
|
||
|
AC_LANG_CONFTEST([AC_LANG_SOURCE([[
|
||
|
]GL_NOCRASH[
|
||
|
#include <stdio.h>
|
||
|
#include <sys/types.h>
|
||
|
#include <sys/time.h>
|
||
|
#include <sys/resource.h>
|
||
|
#include <errno.h>
|
||
|
int main()
|
||
|
{
|
||
|
struct rlimit limit;
|
||
|
int ret;
|
||
|
nocrash_init ();
|
||
|
/* Some printf implementations allocate temporary space with malloc. */
|
||
|
/* On BSD systems, malloc() is limited by RLIMIT_DATA. */
|
||
|
#ifdef RLIMIT_DATA
|
||
|
if (getrlimit (RLIMIT_DATA, &limit) < 0)
|
||
|
return 77;
|
||
|
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
|
||
|
limit.rlim_max = 5000000;
|
||
|
limit.rlim_cur = limit.rlim_max;
|
||
|
if (setrlimit (RLIMIT_DATA, &limit) < 0)
|
||
|
return 77;
|
||
|
#endif
|
||
|
/* On Linux systems, malloc() is limited by RLIMIT_AS. */
|
||
|
#ifdef RLIMIT_AS
|
||
|
if (getrlimit (RLIMIT_AS, &limit) < 0)
|
||
|
return 77;
|
||
|
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
|
||
|
limit.rlim_max = 5000000;
|
||
|
limit.rlim_cur = limit.rlim_max;
|
||
|
if (setrlimit (RLIMIT_AS, &limit) < 0)
|
||
|
return 77;
|
||
|
#endif
|
||
|
/* Some printf implementations allocate temporary space on the stack. */
|
||
|
#ifdef RLIMIT_STACK
|
||
|
if (getrlimit (RLIMIT_STACK, &limit) < 0)
|
||
|
return 77;
|
||
|
if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000)
|
||
|
limit.rlim_max = 5000000;
|
||
|
limit.rlim_cur = limit.rlim_max;
|
||
|
if (setrlimit (RLIMIT_STACK, &limit) < 0)
|
||
|
return 77;
|
||
|
#endif
|
||
|
ret = printf ("%.5000000f", 1.0);
|
||
|
return !(ret == 5000002 || (ret < 0 && errno == ENOMEM));
|
||
|
}
|
||
|
]])])
|
||
|
if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then
|
||
|
(./conftest 2>&AS_MESSAGE_LOG_FD
|
||
|
result=$?
|
||
|
_AS_ECHO_LOG([\$? = $result])
|
||
|
if test $result != 0 && test $result != 77; then result=1; fi
|
||
|
exit $result
|
||
|
) >/dev/null 2>/dev/null
|
||
|
case $? in
|
||
|
0) gl_cv_func_printf_enomem="yes" ;;
|
||
|
77) gl_cv_func_printf_enomem="guessing no" ;;
|
||
|
*) gl_cv_func_printf_enomem="no" ;;
|
||
|
esac
|
||
|
else
|
||
|
gl_cv_func_printf_enomem="guessing no"
|
||
|
fi
|
||
|
rm -fr conftest*
|
||
|
else
|
||
|
dnl A universal build on Apple Mac OS X platforms.
|
||
|
dnl The result would be 'no' in 32-bit mode and 'yes' in 64-bit mode.
|
||
|
dnl But we need a configuration result that is valid in both modes.
|
||
|
gl_cv_func_printf_enomem="guessing no"
|
||
|
fi
|
||
|
fi
|
||
|
if test "$gl_cv_func_printf_enomem" = "guessing no"; then
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on Solaris.
|
||
|
solaris*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on AIX.
|
||
|
aix*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on HP-UX/hppa.
|
||
|
hpux*) case "$host_cpu" in
|
||
|
hppa*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
*) gl_cv_func_printf_enomem="guessing no";;
|
||
|
esac
|
||
|
;;
|
||
|
# Guess yes on IRIX.
|
||
|
irix*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on OSF/1.
|
||
|
osf*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess yes on Haiku.
|
||
|
haiku*) gl_cv_func_printf_enomem="guessing yes";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_printf_enomem="guessing no";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_printf_enomem="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
fi
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001)
|
||
|
dnl Result is ac_cv_func_snprintf.
|
||
|
|
||
|
AC_DEFUN([gl_SNPRINTF_PRESENCE],
|
||
|
[
|
||
|
AC_CHECK_FUNCS_ONCE([snprintf])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the string produced by the snprintf function is always NUL
|
||
|
dnl terminated. (ISO C99, POSIX:2001)
|
||
|
dnl Result is gl_cv_func_snprintf_truncation_c99.
|
||
|
|
||
|
AC_DEFUN_ONCE([gl_SNPRINTF_TRUNCATION_C99],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_REQUIRE([gl_SNPRINTF_PRESENCE])
|
||
|
AC_CACHE_CHECK([whether snprintf truncates the result as in C99],
|
||
|
[gl_cv_func_snprintf_truncation_c99],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
#if HAVE_SNPRINTF
|
||
|
# define my_snprintf snprintf
|
||
|
#else
|
||
|
# include <stdarg.h>
|
||
|
static int my_snprintf (char *buf, int size, const char *format, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
int ret;
|
||
|
va_start (args, format);
|
||
|
ret = vsnprintf (buf, size, format, args);
|
||
|
va_end (args);
|
||
|
return ret;
|
||
|
}
|
||
|
#endif
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
strcpy (buf, "ABCDEF");
|
||
|
my_snprintf (buf, 3, "%d %d", 4567, 89);
|
||
|
if (memcmp (buf, "45\0DEF", 6) != 0)
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_snprintf_truncation_c99=yes],
|
||
|
[gl_cv_func_snprintf_truncation_c99=no],
|
||
|
[
|
||
|
changequote(,)dnl
|
||
|
case "$host_os" in
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 5.
|
||
|
freebsd[1-4].*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on Mac OS X >= 10.3.
|
||
|
darwin[1-6].*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
darwin*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on OpenBSD >= 3.9.
|
||
|
openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
|
||
|
gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
openbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on Solaris >= 2.6.
|
||
|
solaris2.[0-5] | solaris2.[0-5].*)
|
||
|
gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
solaris*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on AIX >= 4.
|
||
|
aix[1-3]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
aix*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on HP-UX >= 11.
|
||
|
hpux[7-9]* | hpux10*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
hpux*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on IRIX >= 6.5.
|
||
|
irix6.5) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on OSF/1 >= 5.
|
||
|
osf[3-4]*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
osf*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on NetBSD >= 3.
|
||
|
netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
|
||
|
gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
netbsd*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_snprintf_truncation_c99="guessing yes";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw*) gl_cv_func_snprintf_truncation_c99="guessing no";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_snprintf_truncation_c99="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
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_ONCE([gl_SNPRINTF_RETVAL_C99],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_REQUIRE([gl_SNPRINTF_PRESENCE])
|
||
|
AC_CACHE_CHECK([whether snprintf returns a byte count as in C99],
|
||
|
[gl_cv_func_snprintf_retval_c99],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
#if HAVE_SNPRINTF
|
||
|
# define my_snprintf snprintf
|
||
|
#else
|
||
|
# include <stdarg.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;
|
||
|
}
|
||
|
#endif
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
strcpy (buf, "ABCDEF");
|
||
|
if (my_snprintf (buf, 3, "%d %d", 4567, 89) != 7)
|
||
|
return 1;
|
||
|
if (my_snprintf (buf, 0, "%d %d", 4567, 89) != 7)
|
||
|
return 2;
|
||
|
if (my_snprintf (NULL, 0, "%d %d", 4567, 89) != 7)
|
||
|
return 3;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_snprintf_retval_c99=yes],
|
||
|
[gl_cv_func_snprintf_retval_c99=no],
|
||
|
[case "$host_os" in
|
||
|
changequote(,)dnl
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 5.
|
||
|
freebsd[1-4].*) gl_cv_func_snprintf_retval_c99="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on Mac OS X >= 10.3.
|
||
|
darwin[1-6].*) gl_cv_func_snprintf_retval_c99="guessing no";;
|
||
|
darwin*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on OpenBSD >= 3.9.
|
||
|
openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*)
|
||
|
gl_cv_func_snprintf_retval_c99="guessing no";;
|
||
|
openbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on Solaris >= 2.10.
|
||
|
solaris2.[1-9][0-9]*) gl_cv_func_printf_sizes_c99="guessing yes";;
|
||
|
solaris*) gl_cv_func_printf_sizes_c99="guessing no";;
|
||
|
# Guess yes on AIX >= 4.
|
||
|
aix[1-3]*) gl_cv_func_snprintf_retval_c99="guessing no";;
|
||
|
aix*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on NetBSD >= 3.
|
||
|
netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
|
||
|
gl_cv_func_snprintf_retval_c99="guessing no";;
|
||
|
netbsd*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_snprintf_retval_c99="guessing yes";;
|
||
|
changequote([,])dnl
|
||
|
# Guess yes on MSVC, no on mingw.
|
||
|
mingw*) AC_EGREP_CPP([Known], [
|
||
|
#ifdef _MSC_VER
|
||
|
Known
|
||
|
#endif
|
||
|
],
|
||
|
[gl_cv_func_snprintf_retval_c99="guessing yes"],
|
||
|
[gl_cv_func_snprintf_retval_c99="guessing no"])
|
||
|
;;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_snprintf_retval_c99="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the snprintf function supports the %n format directive
|
||
|
dnl also in truncated portions of the format string. (ISO C99, POSIX:2001)
|
||
|
dnl Result is gl_cv_func_snprintf_directive_n.
|
||
|
|
||
|
AC_DEFUN([gl_SNPRINTF_DIRECTIVE_N],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_REQUIRE([gl_SNPRINTF_PRESENCE])
|
||
|
AC_CACHE_CHECK([whether snprintf fully supports the 'n' directive],
|
||
|
[gl_cv_func_snprintf_directive_n],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#include <string.h>
|
||
|
#if HAVE_SNPRINTF
|
||
|
# define my_snprintf snprintf
|
||
|
#else
|
||
|
# include <stdarg.h>
|
||
|
static int my_snprintf (char *buf, int size, const char *format, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
int ret;
|
||
|
va_start (args, format);
|
||
|
ret = vsnprintf (buf, size, format, args);
|
||
|
va_end (args);
|
||
|
return ret;
|
||
|
}
|
||
|
#endif
|
||
|
static char fmtstring[10];
|
||
|
static char buf[100];
|
||
|
int main ()
|
||
|
{
|
||
|
int count = -1;
|
||
|
/* Copy the format string. Some systems (glibc with _FORTIFY_SOURCE=2)
|
||
|
support %n in format strings in read-only memory but not in writable
|
||
|
memory. */
|
||
|
strcpy (fmtstring, "%d %n");
|
||
|
my_snprintf (buf, 4, fmtstring, 12345, &count, 33, 44, 55);
|
||
|
if (count != 6)
|
||
|
return 1;
|
||
|
return 0;
|
||
|
}]])],
|
||
|
[gl_cv_func_snprintf_directive_n=yes],
|
||
|
[gl_cv_func_snprintf_directive_n=no],
|
||
|
[
|
||
|
case "$host_os" in
|
||
|
# Guess no on glibc when _FORTIFY_SOURCE >= 2.
|
||
|
*-gnu* | gnu*) AC_COMPILE_IFELSE(
|
||
|
[AC_LANG_SOURCE(
|
||
|
[[#if _FORTIFY_SOURCE >= 2
|
||
|
error fail
|
||
|
#endif
|
||
|
]])],
|
||
|
[gl_cv_func_snprintf_directive_n="guessing yes"],
|
||
|
[gl_cv_func_snprintf_directive_n="guessing no"])
|
||
|
;;
|
||
|
changequote(,)dnl
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 5.
|
||
|
freebsd[1-4].*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on Mac OS X >= 10.3.
|
||
|
darwin[1-6].*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
darwin*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on Solaris >= 2.6.
|
||
|
solaris2.[0-5] | solaris2.[0-5].*)
|
||
|
gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
solaris*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on AIX >= 4.
|
||
|
aix[1-3]*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
aix*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on IRIX >= 6.5.
|
||
|
irix6.5) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on OSF/1 >= 5.
|
||
|
osf[3-4]*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
osf*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on NetBSD >= 3.
|
||
|
netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
|
||
|
gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
netbsd*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_snprintf_directive_n="guessing yes";;
|
||
|
# Guess no on Android.
|
||
|
linux*-android*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
# Guess no on native Windows.
|
||
|
mingw*) gl_cv_func_snprintf_directive_n="guessing no";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_snprintf_directive_n="$gl_cross_guess_normal";;
|
||
|
changequote([,])dnl
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl Test whether the snprintf function, when passed a size = 1, writes any
|
||
|
dnl output without bounds in this case, behaving like sprintf. This is the
|
||
|
dnl case on Linux libc5.
|
||
|
dnl Result is gl_cv_func_snprintf_size1.
|
||
|
|
||
|
AC_DEFUN([gl_SNPRINTF_SIZE1],
|
||
|
[
|
||
|
AC_REQUIRE([AC_PROG_CC])
|
||
|
AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
|
||
|
AC_REQUIRE([gl_SNPRINTF_PRESENCE])
|
||
|
AC_CACHE_CHECK([whether snprintf respects a size of 1],
|
||
|
[gl_cv_func_snprintf_size1],
|
||
|
[
|
||
|
AC_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#include <stdio.h>
|
||
|
#if HAVE_SNPRINTF
|
||
|
# define my_snprintf snprintf
|
||
|
#else
|
||
|
# include <stdarg.h>
|
||
|
static int my_snprintf (char *buf, int size, const char *format, ...)
|
||
|
{
|
||
|
va_list args;
|
||
|
int ret;
|
||
|
va_start (args, format);
|
||
|
ret = vsnprintf (buf, size, format, args);
|
||
|
va_end (args);
|
||
|
return ret;
|
||
|
}
|
||
|
#endif
|
||
|
int main()
|
||
|
{
|
||
|
static char buf[8] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
|
||
|
my_snprintf (buf, 1, "%d", 12345);
|
||
|
return buf[1] != 'E';
|
||
|
}]])],
|
||
|
[gl_cv_func_snprintf_size1=yes],
|
||
|
[gl_cv_func_snprintf_size1=no],
|
||
|
[case "$host_os" in
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_snprintf_size1="guessing yes" ;;
|
||
|
# Guess yes on native Windows.
|
||
|
mingw*) gl_cv_func_snprintf_size1="guessing yes" ;;
|
||
|
*) gl_cv_func_snprintf_size1="guessing yes" ;;
|
||
|
esac
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
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] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
|
||
|
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] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
|
||
|
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_RUN_IFELSE(
|
||
|
[AC_LANG_SOURCE([[
|
||
|
#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] = { 'D', 'E', 'A', 'D', 'B', 'E', 'E', 'F' };
|
||
|
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 "$host_os" in
|
||
|
# Guess yes on glibc systems.
|
||
|
*-gnu* | gnu*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on musl systems.
|
||
|
*-musl*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on FreeBSD >= 5.
|
||
|
freebsd[1-4].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
|
||
|
freebsd* | kfreebsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
midnightbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on Mac OS X >= 10.3.
|
||
|
darwin[1-6].*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
|
||
|
darwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on Cygwin.
|
||
|
cygwin*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on Solaris >= 2.6.
|
||
|
solaris2.[0-5] | solaris2.[0-5].*)
|
||
|
gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
|
||
|
solaris*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on AIX >= 4.
|
||
|
aix[1-3]*) gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
|
||
|
aix*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on IRIX >= 6.5.
|
||
|
irix6.5) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on NetBSD >= 3.
|
||
|
netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*)
|
||
|
gl_cv_func_vsnprintf_zerosize_c99="guessing no";;
|
||
|
netbsd*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on BeOS.
|
||
|
beos*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on Android.
|
||
|
linux*-android*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# Guess yes on native Windows.
|
||
|
mingw* | pw*) gl_cv_func_vsnprintf_zerosize_c99="guessing yes";;
|
||
|
# If we don't know, obey --enable-cross-guesses.
|
||
|
*) gl_cv_func_vsnprintf_zerosize_c99="$gl_cross_guess_normal";;
|
||
|
esac
|
||
|
changequote([,])dnl
|
||
|
])
|
||
|
])
|
||
|
])
|
||
|
|
||
|
dnl The results of these tests on various platforms are:
|
||
|
dnl
|
||
|
dnl 1 = gl_PRINTF_SIZES_C99
|
||
|
dnl 2 = gl_PRINTF_LONG_DOUBLE
|
||
|
dnl 3 = gl_PRINTF_INFINITE
|
||
|
dnl 4 = gl_PRINTF_INFINITE_LONG_DOUBLE
|
||
|
dnl 5 = gl_PRINTF_DIRECTIVE_A
|
||
|
dnl 6 = gl_PRINTF_DIRECTIVE_F
|
||
|
dnl 7 = gl_PRINTF_DIRECTIVE_N
|
||
|
dnl 8 = gl_PRINTF_DIRECTIVE_LS
|
||
|
dnl 9 = gl_PRINTF_POSITIONS
|
||
|
dnl 10 = gl_PRINTF_FLAG_GROUPING
|
||
|
dnl 11 = gl_PRINTF_FLAG_LEFTADJUST
|
||
|
dnl 12 = gl_PRINTF_FLAG_ZERO
|
||
|
dnl 13 = gl_PRINTF_PRECISION
|
||
|
dnl 14 = gl_PRINTF_ENOMEM
|
||
|
dnl 15 = gl_SNPRINTF_PRESENCE
|
||
|
dnl 16 = gl_SNPRINTF_TRUNCATION_C99
|
||
|
dnl 17 = gl_SNPRINTF_RETVAL_C99
|
||
|
dnl 18 = gl_SNPRINTF_DIRECTIVE_N
|
||
|
dnl 19 = gl_SNPRINTF_SIZE1
|
||
|
dnl 20 = gl_VSNPRINTF_ZEROSIZE_C99
|
||
|
dnl
|
||
|
dnl 1 = checking whether printf supports size specifiers as in C99...
|
||
|
dnl 2 = checking whether printf supports 'long double' arguments...
|
||
|
dnl 3 = checking whether printf supports infinite 'double' arguments...
|
||
|
dnl 4 = checking whether printf supports infinite 'long double' arguments...
|
||
|
dnl 5 = checking whether printf supports the 'a' and 'A' directives...
|
||
|
dnl 6 = checking whether printf supports the 'F' directive...
|
||
|
dnl 7 = checking whether printf supports the 'n' directive...
|
||
|
dnl 8 = checking whether printf supports the 'ls' directive...
|
||
|
dnl 9 = checking whether printf supports POSIX/XSI format strings with positions...
|
||
|
dnl 10 = checking whether printf supports the grouping flag...
|
||
|
dnl 11 = checking whether printf supports the left-adjust flag correctly...
|
||
|
dnl 12 = checking whether printf supports the zero flag correctly...
|
||
|
dnl 13 = checking whether printf supports large precisions...
|
||
|
dnl 14 = checking whether printf survives out-of-memory conditions...
|
||
|
dnl 15 = checking for snprintf...
|
||
|
dnl 16 = checking whether snprintf truncates the result as in C99...
|
||
|
dnl 17 = checking whether snprintf returns a byte count as in C99...
|
||
|
dnl 18 = checking whether snprintf fully supports the 'n' directive...
|
||
|
dnl 19 = checking whether snprintf respects a size of 1...
|
||
|
dnl 20 = 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 10 11 12 13 14 15 16 17 18 19 20
|
||
|
dnl glibc 2.5 . . . . . . . . . . . . . . . . . . . .
|
||
|
dnl glibc 2.3.6 . . . . # . . . . . . . . . . . . . . .
|
||
|
dnl FreeBSD 13.0 . . . . # . . . . . . . . # . . . . . .
|
||
|
dnl FreeBSD 5.4, 6.1 . . . . # . . . . . . # . # . . . . . .
|
||
|
dnl Mac OS X 10.13.5 . . . # # . # . . . . . . . . . . # . .
|
||
|
dnl Mac OS X 10.5.8 . . . # # . . . . . . # . . . . . . . .
|
||
|
dnl Mac OS X 10.3.9 . . . . # . . . . . . # . # . . . . . .
|
||
|
dnl OpenBSD 6.0, 6.7 . . . . # . . . . . . . . # . . . . . .
|
||
|
dnl OpenBSD 3.9, 4.0 . . # # # # . # . # . # . # . . . . . .
|
||
|
dnl Cygwin 1.7.0 (2009) . . . # . . . ? . . . . . ? . . . . . .
|
||
|
dnl Cygwin 1.5.25 (2008) . . . # # . . # . . . . . # . . . . . .
|
||
|
dnl Cygwin 1.5.19 (2006) # . . # # # . # . # . # # # . . . . . .
|
||
|
dnl Solaris 11.4 . . # # # . . # . . . # . . . . . . . .
|
||
|
dnl Solaris 11.3 . . . . # . . # . . . . . . . . . . . .
|
||
|
dnl Solaris 11.0 . . # # # . . # . . . # . . . . . . . .
|
||
|
dnl Solaris 10 . . # # # . . # . . . # # . . . . . . .
|
||
|
dnl Solaris 2.6 ... 9 # . # # # # . # . . . # # . . . # . . .
|
||
|
dnl Solaris 2.5.1 # . # # # # . # . . . # . . # # # # # #
|
||
|
dnl AIX 7.1 . . # # # . . . . . . # # . . . . . . .
|
||
|
dnl AIX 5.2 . . # # # . . . . . . # . . . . . . . .
|
||
|
dnl AIX 4.3.2, 5.1 # . # # # # . . . . . # . . . . # . . .
|
||
|
dnl HP-UX 11.31 . . . . # . . . . . . # . . . . # # . .
|
||
|
dnl HP-UX 11.{00,11,23} # . . . # # . . . . . # . . . . # # . #
|
||
|
dnl HP-UX 10.20 # . # . # # . ? . . # # . . . . # # ? #
|
||
|
dnl IRIX 6.5 # . # # # # . # . . . # . . . . # . . .
|
||
|
dnl OSF/1 5.1 # . # # # # . . . . . # . . . . # . . #
|
||
|
dnl OSF/1 4.0d # . # # # # . . . . . # . . # # # # # #
|
||
|
dnl NetBSD 9.0 . . . . # . . . . . . . . . . . . . . .
|
||
|
dnl NetBSD 5.0 . . . # # . . . . . . # . # . . . . . .
|
||
|
dnl NetBSD 4.0 . ? ? ? ? ? . ? . ? ? ? ? ? . . . ? ? ?
|
||
|
dnl NetBSD 3.0 . . . . # # . ? # # ? # . # . . . . . .
|
||
|
dnl Haiku . . . # # # . # . . . . . ? . . ? . . .
|
||
|
dnl BeOS # # . # # # . ? # . ? . # ? . . ? . . .
|
||
|
dnl Android 4.3 . . # # # # # # . # . # . # . . . # . .
|
||
|
dnl old mingw / msvcrt # # # # # # . . # # . # # ? . # # # . .
|
||
|
dnl MSVC 9 # # # # # # # . # # . # # ? # # # # . .
|
||
|
dnl mingw 2009-2011 . # . # . . . . # # . . . ? . . . . . .
|
||
|
dnl mingw-w64 2011 # # # # # # . . # # . # # ? . # # # . .
|