diff options
author | Simon Josefsson <simon@josefsson.org> | 2008-04-22 09:56:03 +0200 |
---|---|---|
committer | Simon Josefsson <simon@josefsson.org> | 2008-04-22 09:56:03 +0200 |
commit | 34e3d59b2e276b8a45924f11f6916399fa14f5be (patch) | |
tree | b38105ad52a248826e01451a651b3a2435c73070 | |
parent | 3c161ef731049a9871b411b5df39447846eacb3b (diff) | |
download | gnutls-34e3d59b2e276b8a45924f11f6916399fa14f5be.tar.gz |
Update gnulib files.
-rw-r--r-- | gl/gnulib.mk | 2 | ||||
-rw-r--r-- | lgl/Makefile.am | 3 | ||||
-rw-r--r-- | lgl/gc-gnulib.c | 1 | ||||
-rw-r--r-- | lgl/m4/gnulib-comp.m4 | 1 | ||||
-rw-r--r-- | lgl/m4/printf.m4 | 1309 | ||||
-rw-r--r-- | lgl/m4/snprintf.m4 | 15 | ||||
-rw-r--r-- | lgl/m4/sys_stat_h.m4 | 47 | ||||
-rw-r--r-- | lgl/sys_stat.in.h | 21 | ||||
-rw-r--r-- | lgl/vasnprintf.c | 128 |
9 files changed, 1488 insertions, 39 deletions
diff --git a/gl/gnulib.mk b/gl/gnulib.mk index 0a4ed429fd..049e49a0c9 100644 --- a/gl/gnulib.mk +++ b/gl/gnulib.mk @@ -33,6 +33,8 @@ arpa/inet.h: rm -f $@-t $@ { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \ echo '#include <sys/socket.h>'; \ + echo '#include <inet_ntop.h>'; \ + echo '#include <inet_pton.h>'; \ } > $@-t mv $@-t $@ MOSTLYCLEANFILES += arpa/inet.h arpa/inet.h-t diff --git a/lgl/Makefile.am b/lgl/Makefile.am index 7c26b0dca8..f6e3f4a03a 100644 --- a/lgl/Makefile.am +++ b/lgl/Makefile.am @@ -599,9 +599,8 @@ sys/stat.h: sys_stat.in.h { echo '/* DO NOT EDIT! GENERATED AUTOMATICALLY! */'; \ sed -e 's/@''INCLUDE_NEXT''@/$(INCLUDE_NEXT)/g' \ -e 's|@''NEXT_SYS_STAT_H''@|$(NEXT_SYS_STAT_H)|g' \ - -e 's|@''HAVE_IO_H''@|$(HAVE_IO_H)|g' \ -e 's|@''HAVE_LSTAT''@|$(HAVE_LSTAT)|g' \ - -e 's|@''HAVE_DECL_MKDIR''@|$(HAVE_DECL_MKDIR)|g' \ + -e 's|@''REPLACE_MKDIR''@|$(REPLACE_MKDIR)|g' \ < $(srcdir)/sys_stat.in.h; \ } > $@-t mv $@-t $@ diff --git a/lgl/gc-gnulib.c b/lgl/gc-gnulib.c index 27fafe452b..10e47078c6 100644 --- a/lgl/gc-gnulib.c +++ b/lgl/gc-gnulib.c @@ -75,6 +75,7 @@ #ifdef GNULIB_GC_RANDOM # if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ +# include <windows.h> # include <wincrypt.h> HCRYPTPROV g_hProv = 0; # endif diff --git a/lgl/m4/gnulib-comp.m4 b/lgl/m4/gnulib-comp.m4 index 9b2ca07911..d2b7ee3b9e 100644 --- a/lgl/m4/gnulib-comp.m4 +++ b/lgl/m4/gnulib-comp.m4 @@ -365,6 +365,7 @@ AC_DEFUN([lgl_FILE_LIST], [ m4/nls.m4 m4/po.m4 m4/printf-posix.m4 + m4/printf.m4 m4/progtest.m4 m4/read-file.m4 m4/realloc.m4 diff --git a/lgl/m4/printf.m4 b/lgl/m4/printf.m4 new file mode 100644 index 0000000000..d544edd72d --- /dev/null +++ b/lgl/m4/printf.m4 @@ -0,0 +1,1309 @@ +# printf.m4 serial 23 +dnl Copyright (C) 2003, 2007-2008 Free Software Foundation, Inc. +dnl This file is free software; the Free Software Foundation +dnl gives unlimited permission to copy and/or distribute it, +dnl with or without modifications, as long as this notice is preserved. + +dnl Test whether the *printf family of functions supports the 'j', 'z', 't', +dnl 'L' size specifiers. (ISO C99, POSIX:2001) +dnl Result is gl_cv_func_printf_sizes_c99. + +AC_DEFUN([gl_PRINTF_SIZES_C99], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([gl_AC_HEADER_STDINT_H]) + AC_REQUIRE([gl_AC_HEADER_INTTYPES_H]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports size specifiers as in C99], + [gl_cv_func_printf_sizes_c99], + [ + AC_TRY_RUN([ +#include <stddef.h> +#include <stdio.h> +#include <string.h> +#include <sys/types.h> +#if HAVE_STDINT_H_WITH_UINTMAX +# include <stdint.h> +#endif +#if HAVE_INTTYPES_H_WITH_UINTMAX +# include <inttypes.h> +#endif +static char buf[100]; +int main () +{ +#if HAVE_STDINT_H_WITH_UINTMAX || HAVE_INTTYPES_H_WITH_UINTMAX + buf[0] = '\0'; + if (sprintf (buf, "%ju %d", (uintmax_t) 12345671, 33, 44, 55) < 0 + || strcmp (buf, "12345671 33") != 0) + return 1; +#endif + buf[0] = '\0'; + if (sprintf (buf, "%zu %d", (size_t) 12345672, 33, 44, 55) < 0 + || strcmp (buf, "12345672 33") != 0) + return 1; + buf[0] = '\0'; + if (sprintf (buf, "%tu %d", (ptrdiff_t) 12345673, 33, 44, 55) < 0 + || strcmp (buf, "12345673 33") != 0) + return 1; + buf[0] = '\0'; + if (sprintf (buf, "%Lg %d", (long double) 1.5, 33, 44, 55) < 0 + || strcmp (buf, "1.5 33") != 0) + return 1; + return 0; +}], [gl_cv_func_printf_sizes_c99=yes], [gl_cv_func_printf_sizes_c99=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_printf_sizes_c99="guessing yes";; + # Guess yes on FreeBSD >= 5. + freebsd[1-4]*) gl_cv_func_printf_sizes_c99="guessing no";; + freebsd* | kfreebsd*) gl_cv_func_printf_sizes_c99="guessing yes";; + # Guess yes on MacOS X >= 10.3. + darwin[1-6].*) gl_cv_func_printf_sizes_c99="guessing no";; + darwin*) gl_cv_func_printf_sizes_c99="guessing yes";; + # Guess yes on OpenBSD >= 3.9. + openbsd[1-2].* | openbsd3.[0-8] | openbsd3.[0-8].*) + gl_cv_func_printf_sizes_c99="guessing no";; + openbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; + # Guess yes on Solaris >= 2.10. + solaris2.[0-9]*) gl_cv_func_printf_sizes_c99="guessing no";; + solaris*) gl_cv_func_printf_sizes_c99="guessing yes";; + # Guess yes on NetBSD >= 3. + netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) + gl_cv_func_printf_sizes_c99="guessing no";; + netbsd*) gl_cv_func_printf_sizes_c99="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_sizes_c99="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +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[10000]; +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 infinite and NaN +dnl 'double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001) +dnl Result is gl_cv_func_printf_infinite. + +AC_DEFUN([gl_PRINTF_INFINITE], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports infinite 'double' arguments], + [gl_cv_func_printf_infinite], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static int +strisnan (const char *string, size_t start_index, size_t end_index) +{ + if (start_index < end_index) + { + if (string[start_index] == '-') + start_index++; + if (start_index + 3 <= end_index + && memcmp (string + start_index, "nan", 3) == 0) + { + start_index += 3; + if (start_index == end_index + || (string[start_index] == '(' && string[end_index - 1] == ')')) + return 1; + } + } + return 0; +} +static char buf[10000]; +static double zero = 0.0; +int main () +{ + if (sprintf (buf, "%f", 1.0 / 0.0) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%f", -1.0 / 0.0) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%f", zero / zero) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%e", 1.0 / 0.0) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%e", -1.0 / 0.0) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%e", zero / zero) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%g", 1.0 / 0.0) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%g", -1.0 / 0.0) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%g", zero / zero) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + return 0; +}], [gl_cv_func_printf_infinite=yes], [gl_cv_func_printf_infinite=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_printf_infinite="guessing yes";; + # Guess yes on FreeBSD >= 6. + freebsd[1-5]*) gl_cv_func_printf_infinite="guessing no";; + freebsd* | kfreebsd*) gl_cv_func_printf_infinite="guessing yes";; + # Guess yes on MacOS X >= 10.3. + darwin[1-6].*) gl_cv_func_printf_infinite="guessing no";; + darwin*) gl_cv_func_printf_infinite="guessing yes";; + # Guess yes on HP-UX >= 11. + hpux[7-9]* | hpux10*) gl_cv_func_printf_infinite="guessing no";; + hpux*) gl_cv_func_printf_infinite="guessing yes";; + # Guess yes on NetBSD >= 3. + netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) + gl_cv_func_printf_infinite="guessing no";; + netbsd*) gl_cv_func_printf_infinite="guessing yes";; + # Guess yes on BeOS. + beos*) gl_cv_func_printf_infinite="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_infinite="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +dnl Test whether the *printf family of functions supports infinite and NaN +dnl 'long double' arguments in the %f, %e, %g directives. (ISO C99, POSIX:2001) +dnl Result is gl_cv_func_printf_infinite_long_double. + +AC_DEFUN([gl_PRINTF_INFINITE_LONG_DOUBLE], +[ + AC_REQUIRE([gl_PRINTF_LONG_DOUBLE]) + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_C_BIGENDIAN]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + dnl The user can set or unset the variable gl_printf_safe to indicate + dnl that he wishes a safe handling of non-IEEE-754 'long double' values. + if test -n "$gl_printf_safe"; then + AC_DEFINE([CHECK_PRINTF_SAFE], 1, + [Define if you wish *printf() functions that have a safe handling of + non-IEEE-754 'long double' values.]) + fi + case "$gl_cv_func_printf_long_double" in + *yes) + AC_CACHE_CHECK([whether printf supports infinite 'long double' arguments], + [gl_cv_func_printf_infinite_long_double], + [ + AC_TRY_RUN([ +]GL_NOCRASH[ +#include <float.h> +#include <stdio.h> +#include <string.h> +static int +strisnan (const char *string, size_t start_index, size_t end_index) +{ + if (start_index < end_index) + { + if (string[start_index] == '-') + start_index++; + if (start_index + 3 <= end_index + && memcmp (string + start_index, "nan", 3) == 0) + { + start_index += 3; + if (start_index == end_index + || (string[start_index] == '(' && string[end_index - 1] == ')')) + return 1; + } + } + return 0; +} +static char buf[10000]; +static long double zeroL = 0.0L; +int main () +{ + nocrash_init(); + if (sprintf (buf, "%Lf", 1.0L / 0.0L) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%Lf", -1.0L / 0.0L) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%Lf", zeroL / zeroL) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", 1.0L / 0.0L) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%Le", -1.0L / 0.0L) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%Le", zeroL / zeroL) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", 1.0L / 0.0L) < 0 + || (strcmp (buf, "inf") != 0 && strcmp (buf, "infinity") != 0)) + return 1; + if (sprintf (buf, "%Lg", -1.0L / 0.0L) < 0 + || (strcmp (buf, "-inf") != 0 && strcmp (buf, "-infinity") != 0)) + return 1; + if (sprintf (buf, "%Lg", zeroL / zeroL) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 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_)) +/* 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))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { + /* 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))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-NaN. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0x40000001, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Infinity. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0xFFFF, 0x00000000, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Zero. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x4004, 0x00000000, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Unnormalized number. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x4000, 0x63333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } + { /* Pseudo-Denormal. */ + static union { unsigned int word[4]; long double value; } x = + { LDBL80_WORDS (0x0000, 0x83333333, 0x00000000) }; + if (sprintf (buf, "%Lf", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Le", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + if (sprintf (buf, "%Lg", x.value) < 0 + || !strisnan (buf, 0, strlen (buf))) + return 1; + } +#endif + return 0; +}], + [gl_cv_func_printf_infinite_long_double=yes], + [gl_cv_func_printf_infinite_long_double=no], + [ +changequote(,)dnl + 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 + # Guess yes on glibc systems. + *-gnu*) 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";; + # Guess yes on MacOS X >= 10.3. + darwin[1-6].*) gl_cv_func_printf_infinite_long_double="guessing no";; + darwin*) 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 NetBSD >= 3. + netbsd[1-2]* | netbsdelf[1-2]* | netbsdaout[1-2]* | netbsdcoff[1-2]*) + gl_cv_func_printf_infinite_long_double="guessing no";; + netbsd*) gl_cv_func_printf_infinite_long_double="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_infinite_long_double="guessing no";; + esac + ;; + esac +changequote([,])dnl + ]) + ]) + ;; + *) + 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_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[100]; +int main () +{ + 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)) + return 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)) + return 1; + /* This catches a FreeBSD 6.1 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)) + return 1; + /* This catches a FreeBSD 6.1 bug. See + <http://lists.gnu.org/archive/html/bug-gnulib/2007-04/msg00107.html> */ + if (sprintf (buf, "%010a %d", 1.0 / 0.0, 33, 44, 55) < 0 + || buf[0] == '0') + return 1; + /* This catches a MacOS 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)) + return 1; + /* This catches the same MacOS X 10.3.9 (Darwin 7.9) bug and also a + glibc 2.4 bug <http://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)) + return 1; + return 0; +}], [gl_cv_func_printf_directive_a=yes], [gl_cv_func_printf_directive_a=no], + [ + case "$host_os" in + # Guess yes on glibc >= 2.5 systems. + *-gnu*) + AC_EGREP_CPP([BZ2908], [ + #include <features.h> + #ifdef __GNU_LIBRARY__ + #if (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 5) || (__GLIBC__ > 2) + BZ2908 + #endif + #endif + ], + [gl_cv_func_printf_directive_a="guessing yes"], + [gl_cv_func_printf_directive_a="guessing no"]) + ;; + # If we don't know, assume the worst. + *) gl_cv_func_printf_directive_a="guessing no";; + esac + ]) + ]) +]) + +dnl Test whether the *printf family of functions supports the %F format +dnl directive. (ISO C99, POSIX:2001) +dnl Result is gl_cv_func_printf_directive_f. + +AC_DEFUN([gl_PRINTF_DIRECTIVE_F], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports the 'F' directive], + [gl_cv_func_printf_directive_f], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[100]; +int main () +{ + if (sprintf (buf, "%F %d", 1234567.0, 33, 44, 55) < 0 + || strcmp (buf, "1234567.000000 33") != 0) + return 1; + if (sprintf (buf, "%F", 1.0 / 0.0) < 0 + || (strcmp (buf, "INF") != 0 && strcmp (buf, "INFINITY") != 0)) + return 1; + /* This catches a Cygwin 2007 bug. */ + if (sprintf (buf, "%.F", 1234.0) < 0 + || strcmp (buf, "1234") != 0) + return 1; + return 0; +}], [gl_cv_func_printf_directive_f=yes], [gl_cv_func_printf_directive_f=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) 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";; + # Guess yes on MacOS 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 Solaris >= 2.10. + solaris2.[0-9]*) gl_cv_func_printf_directive_f="guessing no";; + solaris*) gl_cv_func_printf_directive_f="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_directive_f="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +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_TRY_RUN([ +#include <stdio.h> +#include <string.h> +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"); + 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], + [ +changequote(,)dnl + case "$host_os" in + *) gl_cv_func_printf_directive_n="guessing yes";; + esac +changequote([,])dnl + ]) + ]) +]) + +dnl Test whether the *printf family of functions supports POSIX/XSI format +dnl strings with positions. (POSIX:2001) +dnl Result is gl_cv_func_printf_positions. + +AC_DEFUN([gl_PRINTF_POSITIONS], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports POSIX/XSI format strings with positions], + [gl_cv_func_printf_positions], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +/* The string "%2$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";; + 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_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 "$host_os" in + cygwin*) gl_cv_func_printf_flag_grouping="guessing no";; + netbsd*) gl_cv_func_printf_flag_grouping="guessing no";; + mingw* | pw*) gl_cv_func_printf_flag_grouping="guessing no";; + *) gl_cv_func_printf_flag_grouping="guessing yes";; + esac +changequote([,])dnl + ]) + ]) +]) + +dnl Test whether the *printf family of functions supports the - flag correctly. +dnl (ISO C99.) See +dnl <http://lists.gnu.org/archive/html/bug-coreutils/2008-02/msg00035.html> +dnl Result is gl_cv_func_printf_flag_leftadjust. + +AC_DEFUN([gl_PRINTF_FLAG_LEFTADJUST], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports the left-adjust flag correctly], + [gl_cv_func_printf_flag_leftadjust], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[100]; +int main () +{ + /* Check that a '-' flag is not annihilated by a negative width. */ + if (sprintf (buf, "a%-*sc", -3, "b") < 0 + || strcmp (buf, "ab c") != 0) + return 1; + return 0; +}], + [gl_cv_func_printf_flag_leftadjust=yes], + [gl_cv_func_printf_flag_leftadjust=no], + [ +changequote(,)dnl + case "$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 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 <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 "$host_os" in + # Guess yes on glibc systems. + *-gnu*) gl_cv_func_printf_flag_zero="guessing yes";; + # Guess yes on BeOS. + beos*) gl_cv_func_printf_flag_zero="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_flag_zero="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +dnl Test whether the *printf family of functions supports large precisions. +dnl On mingw, precisions larger than 512 are treated like 512, in integer, +dnl floating-point or pointer output. On BeOS, precisions larger than 1044 +dnl crash the program. +dnl Result is gl_cv_func_printf_precision. + +AC_DEFUN([gl_PRINTF_PRECISION], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf supports large precisions], + [gl_cv_func_printf_precision], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[5000]; +int main () +{ +#ifdef __BEOS__ + /* On BeOS, this would crash and show a dialog box. Avoid the crash. */ + return 1; +#endif + if (sprintf (buf, "%.4000d %d", 1, 33, 44) < 4000 + 3) + return 1; + return 0; +}], [gl_cv_func_printf_precision=yes], [gl_cv_func_printf_precision=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess no only on native Win32 and BeOS systems. + mingw* | pw*) gl_cv_func_printf_precision="guessing no" ;; + beos*) gl_cv_func_printf_precision="guessing no" ;; + *) 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([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether printf survives out-of-memory conditions], + [gl_cv_func_printf_enomem], + [ + if test "$cross_compiling" = no; then + AC_LANG_CONFTEST([AC_LANG_SOURCE([ +]GL_NOCRASH[ +changequote(,)dnl +#include <stdio.h> +#include <sys/types.h> +#include <sys/time.h> +#include <sys/resource.h> +#include <errno.h> +int main() +{ + struct rlimit limit; + int ret; + nocrash_init (); + /* Some printf implementations allocate temporary space with malloc. */ + /* On BSD systems, malloc() is limited by RLIMIT_DATA. */ +#ifdef RLIMIT_DATA + if (getrlimit (RLIMIT_DATA, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_DATA, &limit) < 0) + return 77; +#endif + /* On Linux systems, malloc() is limited by RLIMIT_AS. */ +#ifdef RLIMIT_AS + if (getrlimit (RLIMIT_AS, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_AS, &limit) < 0) + return 77; +#endif + /* Some printf implementations allocate temporary space on the stack. */ +#ifdef RLIMIT_STACK + if (getrlimit (RLIMIT_STACK, &limit) < 0) + return 77; + if (limit.rlim_max == RLIM_INFINITY || limit.rlim_max > 5000000) + limit.rlim_max = 5000000; + limit.rlim_cur = limit.rlim_max; + if (setrlimit (RLIMIT_STACK, &limit) < 0) + return 77; +#endif + ret = printf ("%.5000000f", 1.0); + return !(ret == 5000002 || (ret < 0 && errno == ENOMEM)); +} +changequote([,])dnl + ])]) + if AC_TRY_EVAL([ac_link]) && test -s conftest$ac_exeext; then + (./conftest + result=$? + if test $result != 0 && test $result != 77; then result=1; fi + exit $result + ) >/dev/null 2>/dev/null + case $? in + 0) gl_cv_func_printf_enomem="yes" ;; + 77) gl_cv_func_printf_enomem="guessing no" ;; + *) gl_cv_func_printf_enomem="no" ;; + esac + else + gl_cv_func_printf_enomem="guessing no" + fi + rm -fr conftest* + else +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-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 "$host_cpu" in + hppa*) gl_cv_func_printf_enomem="guessing yes";; + *) gl_cv_func_printf_enomem="guessing no";; + esac + ;; + # Guess yes on IRIX. + irix*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on OSF/1. + osf*) gl_cv_func_printf_enomem="guessing yes";; + # Guess yes on BeOS. + beos*) gl_cv_func_printf_enomem="guessing yes";; + # If we don't know, assume the worst. + *) gl_cv_func_printf_enomem="guessing no";; + esac +changequote([,])dnl + fi + ]) +]) + +dnl Test whether the snprintf function exists. (ISO C99, POSIX:2001) +dnl Result is ac_cv_func_snprintf. + +AC_DEFUN([gl_SNPRINTF_PRESENCE], +[ + AC_CHECK_FUNCS_ONCE([snprintf]) +]) + +dnl Test whether the string produced by the snprintf function is always NUL +dnl terminated. (ISO C99, POSIX:2001) +dnl Result is gl_cv_func_snprintf_truncation_c99. + +AC_DEFUN([gl_SNPRINTF_TRUNCATION_C99], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether snprintf truncates the result as in C99], + [gl_cv_func_snprintf_truncation_c99], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[100]; +int main () +{ + strcpy (buf, "ABCDEF"); + snprintf (buf, 3, "%d %d", 4567, 89); + if (memcmp (buf, "45\0DEF", 6) != 0) + return 1; + return 0; +}], [gl_cv_func_snprintf_truncation_c99=yes], [gl_cv_func_snprintf_truncation_c99=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) 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";; + # Guess yes on MacOS 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]*) 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";; + # If we don't know, assume the worst. + *) gl_cv_func_snprintf_truncation_c99="guessing no";; + 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([gl_SNPRINTF_RETVAL_C99], +[ + AC_REQUIRE([AC_PROG_CC]) + AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles + AC_CACHE_CHECK([whether snprintf returns a byte count as in C99], + [gl_cv_func_snprintf_retval_c99], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +static char buf[100]; +int main () +{ + strcpy (buf, "ABCDEF"); + if (snprintf (buf, 3, "%d %d", 4567, 89) != 7) + return 1; + return 0; +}], [gl_cv_func_snprintf_retval_c99=yes], [gl_cv_func_snprintf_retval_c99=no], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) 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";; + # Guess yes on MacOS 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 >= 2.6. + solaris2.[0-5]*) gl_cv_func_snprintf_retval_c99="guessing no";; + solaris*) gl_cv_func_snprintf_retval_c99="guessing yes";; + # 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";; + # If we don't know, assume the worst. + *) gl_cv_func_snprintf_retval_c99="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +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_CACHE_CHECK([whether snprintf fully supports the 'n' directive], + [gl_cv_func_snprintf_directive_n], + [ + AC_TRY_RUN([ +#include <stdio.h> +#include <string.h> +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"); + 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], + [ +changequote(,)dnl + case "$host_os" in + # Guess yes on glibc systems. + *-gnu*) 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";; + # Guess yes on MacOS 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]*) 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";; + # If we don't know, assume the worst. + *) gl_cv_func_snprintf_directive_n="guessing no";; + esac +changequote([,])dnl + ]) + ]) +]) + +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_CACHE_CHECK([whether snprintf respects a size of 1], + [gl_cv_func_snprintf_size1], + [ + AC_TRY_RUN([ +#include <stdio.h> +int main() +{ + static char buf[8] = "DEADBEEF"; + snprintf (buf, 1, "%d", 12345); + return buf[1] != 'E'; +}], + [gl_cv_func_snprintf_size1=yes], + [gl_cv_func_snprintf_size1=no], + [gl_cv_func_snprintf_size1="guessing yes"]) + ]) +]) + +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_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_POSITIONS +dnl 9 = gl_PRINTF_FLAG_GROUPING +dnl 10 = gl_PRINTF_FLAG_LEFTADJUST +dnl 11 = gl_PRINTF_FLAG_ZERO +dnl 12 = gl_PRINTF_PRECISION +dnl 13 = gl_PRINTF_ENOMEM +dnl 14 = gl_SNPRINTF_PRESENCE +dnl 15 = gl_SNPRINTF_TRUNCATION_C99 +dnl 16 = gl_SNPRINTF_RETVAL_C99 +dnl 17 = gl_SNPRINTF_DIRECTIVE_N +dnl 18 = gl_SNPRINTF_SIZE1 +dnl 19 = 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 POSIX/XSI format strings with positions... +dnl 9 = checking whether printf supports the grouping flag... +dnl 10 = checking whether printf supports the left-adjust flag correctly... +dnl 11 = checking whether printf supports the zero flag correctly... +dnl 12 = checking whether printf supports large precisions... +dnl 13 = checking whether printf survives out-of-memory conditions... +dnl 14 = checking for snprintf... +dnl 15 = checking whether snprintf truncates the result as in C99... +dnl 16 = checking whether snprintf returns a byte count as in C99... +dnl 17 = checking whether snprintf fully supports the 'n' directive... +dnl 18 = checking whether snprintf respects a size of 1... +dnl 19 = 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 +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 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 4.0 . ? ? ? ? ? . . ? ? ? ? ? . . . ? ? ? +dnl NetBSD 3.0 . . . . # # . # # ? # . # . . . . . . +dnl BeOS # # . # # # . # . ? . # ? . . . . . . +dnl mingw # # # # # # . # # . # # ? . # # # . . diff --git a/lgl/m4/snprintf.m4 b/lgl/m4/snprintf.m4 index f21200dcea..6021786ee1 100644 --- a/lgl/m4/snprintf.m4 +++ b/lgl/m4/snprintf.m4 @@ -1,5 +1,5 @@ -# snprintf.m4 serial 4 -dnl Copyright (C) 2002, 2003, 2004, 2007 Free Software Foundation, Inc. +# snprintf.m4 serial 5 +dnl Copyright (C) 2002-2004, 2007-2008 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -7,8 +7,17 @@ dnl with or without modifications, as long as this notice is preserved. AC_DEFUN([gl_FUNC_SNPRINTF], [ AC_REQUIRE([gl_STDIO_H_DEFAULTS]) + gl_cv_func_snprintf_usable=no AC_CHECK_FUNCS([snprintf]) - if test $ac_cv_func_snprintf = no; then + if test $ac_cv_func_snprintf = yes; then + gl_SNPRINTF_SIZE1 + case "$gl_cv_func_snprintf_size1" in + *yes) + gl_cv_func_snprintf_usable=yes + ;; + esac + fi + if test $gl_cv_func_snprintf_usable = no; then gl_REPLACE_SNPRINTF fi AC_CHECK_DECLS_ONCE([snprintf]) diff --git a/lgl/m4/sys_stat_h.m4 b/lgl/m4/sys_stat_h.m4 index 1bc08a1726..cfe80110c6 100644 --- a/lgl/m4/sys_stat_h.m4 +++ b/lgl/m4/sys_stat_h.m4 @@ -1,5 +1,5 @@ -# sys_stat_h.m4 serial 6 -*- Autoconf -*- -dnl Copyright (C) 2006-2007 Free Software Foundation, Inc. +# sys_stat_h.m4 serial 8 -*- Autoconf -*- +dnl Copyright (C) 2006-2008 Free Software Foundation, Inc. dnl This file is free software; the Free Software Foundation dnl gives unlimited permission to copy and/or distribute it, dnl with or without modifications, as long as this notice is preserved. @@ -9,6 +9,8 @@ dnl Test whether <sys/stat.h> contains lstat and mkdir or must be substituted. AC_DEFUN([gl_HEADER_SYS_STAT_H], [ + AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) + dnl Check for lstat. Systems that lack it (mingw) also lack symlinks, so dnl stat is a good replacement. AC_CHECK_FUNCS_ONCE([lstat]) @@ -19,24 +21,7 @@ AC_DEFUN([gl_HEADER_SYS_STAT_H], fi AC_SUBST([HAVE_LSTAT]) - dnl Check for mkdir. Mingw has _mkdir(name) in the nonstandard <io.h> - dnl instead. - AC_CHECK_DECLS([mkdir], - [], - [AC_CHECK_HEADERS([io.h])], - [#include <sys/stat.h>]) - if test $ac_cv_have_decl_mkdir = yes; then - HAVE_DECL_MKDIR=1 - else - HAVE_DECL_MKDIR=0 - fi - AC_SUBST([HAVE_DECL_MKDIR]) - if test "$ac_cv_header_io_h" = yes; then - HAVE_IO_H=1 - else - HAVE_IO_H=0 - fi - AC_SUBST([HAVE_IO_H]) + dnl For the mkdir substitute. AC_REQUIRE([AC_C_INLINE]) dnl Check for broken stat macros. @@ -45,4 +30,26 @@ AC_DEFUN([gl_HEADER_SYS_STAT_H], gl_CHECK_NEXT_HEADERS([sys/stat.h]) SYS_STAT_H='sys/stat.h' AC_SUBST([SYS_STAT_H]) + + dnl Define types that are supposed to be defined in <sys/types.h> or + dnl <sys/stat.h>. + AC_CHECK_TYPE([nlink_t], [], + [AC_DEFINE([nlink_t], [int], + [Define to the type of st_nlink in struct stat, or a supertype.])], + [#include <sys/types.h> + #include <sys/stat.h>]) + ]) # gl_HEADER_SYS_STAT_H + +AC_DEFUN([gl_SYS_STAT_MODULE_INDICATOR], +[ + dnl Use AC_REQUIRE here, so that the default settings are expanded once only. + AC_REQUIRE([gl_SYS_STAT_H_DEFAULTS]) + GNULIB_[]m4_translit([$1],[abcdefghijklmnopqrstuvwxyz./-],[ABCDEFGHIJKLMNOPQRSTUVWXYZ___])=1 +]) + +AC_DEFUN([gl_SYS_STAT_H_DEFAULTS], +[ + dnl Assume proper GNU behavior unless another module says otherwise. + REPLACE_MKDIR=0; AC_SUBST([REPLACE_MKDIR]) +]) diff --git a/lgl/sys_stat.in.h b/lgl/sys_stat.in.h index ff2159f3e0..1ffefa18b9 100644 --- a/lgl/sys_stat.in.h +++ b/lgl/sys_stat.in.h @@ -1,5 +1,5 @@ /* Provide a more complete sys/stat header file. - Copyright (C) 2006, 2007 Free Software Foundation, Inc. + Copyright (C) 2006-2008 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by @@ -29,6 +29,12 @@ #ifndef _GL_SYS_STAT_H #define _GL_SYS_STAT_H +/* Before doing "#define mkdir rpl_mkdir" below, we need to include all + headers that may declare mkdir(). */ +#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ +# include <io.h> +#endif + #ifndef S_IFMT # define S_IFMT 0170000 #endif @@ -261,11 +267,15 @@ # define lstat stat #endif +#if @REPLACE_MKDIR@ +# undef mkdir +# define mkdir rpl_mkdir +extern int mkdir (char const *name, mode_t mode); +#else /* mingw's _mkdir() function has 1 argument, but we pass 2 arguments. Additionally, it declares _mkdir (and depending on compile flags, an - alias mkdir), only in the nonstandard io.h. */ -#if ! @HAVE_DECL_MKDIR@ && @HAVE_IO_H@ -# include <io.h> + alias mkdir), only in the nonstandard <io.h>, which is included above. */ +# if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__ static inline int rpl_mkdir (char const *name, mode_t mode) @@ -273,7 +283,8 @@ rpl_mkdir (char const *name, mode_t mode) return _mkdir (name); } -# define mkdir rpl_mkdir +# define mkdir rpl_mkdir +# endif #endif #endif /* _GL_SYS_STAT_H */ diff --git a/lgl/vasnprintf.c b/lgl/vasnprintf.c index ec694dfb69..4583f7d865 100644 --- a/lgl/vasnprintf.c +++ b/lgl/vasnprintf.c @@ -177,10 +177,12 @@ local_wcslen (const wchar_t *s) # endif #else /* TCHAR_T is char. */ -# /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'. + /* Use snprintf if it exists under the name 'snprintf' or '_snprintf'. But don't use it on BeOS, since BeOS snprintf produces no output if the - size argument is >= 0x3000000. */ -# if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__ + size argument is >= 0x3000000. + Also don't use it on Linux libc5, since there snprintf with size = 1 + writes any output without bounds, like sprintf. */ +# if (HAVE_DECL__SNPRINTF || HAVE_SNPRINTF) && !defined __BEOS__ && !(__GNU_LIBRARY__ == 1) # define USE_SNPRINTF 1 # else # define USE_SNPRINTF 0 @@ -1301,9 +1303,9 @@ floorlog10l (long double x) } /* Now 0.95 <= z <= 1.01. */ z = 1 - z; - /* log(1-z) = - z - z^2/2 - z^3/3 - z^4/4 - ... + /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...) Four terms are enough to get an approximation with error < 10^-7. */ - l -= z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); + l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); /* Finally multiply with log(2)/log(10), yields an approximation for log10(x). */ l *= 0.30102999566398119523; @@ -1392,9 +1394,9 @@ floorlog10 (double x) } /* Now 0.95 <= z <= 1.01. */ z = 1 - z; - /* log(1-z) = - z - z^2/2 - z^3/3 - z^4/4 - ... + /* log2(1-z) = 1/log(2) * (- z - z^2/2 - z^3/3 - z^4/4 - ...) Four terms are enough to get an approximation with error < 10^-7. */ - l -= z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); + l -= 1.4426950408889634074 * z * (1.0 + z * (0.5 + z * ((1.0 / 3) + z * 0.25))); /* Finally multiply with log(2)/log(10), yields an approximation for log10(x). */ l *= 0.30102999566398119523; @@ -1404,6 +1406,20 @@ floorlog10 (double x) # endif +/* Tests whether a string of digits consists of exactly PRECISION zeroes and + a single '1' digit. */ +static int +is_borderline (const char *digits, size_t precision) +{ + for (; precision > 0; precision--, digits++) + if (*digits != '0') + return 0; + if (*digits != '1') + return 0; + digits++; + return *digits == '\0'; +} + #endif DCHAR_T * @@ -2853,8 +2869,32 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp, exponent += 1; adjusted = 1; } - /* Here ndigits = precision+1. */ + if (is_borderline (digits, precision)) + { + /* Maybe the exponent guess was too high + and a smaller exponent can be reached + by turning a 10...0 into 9...9x. */ + char *digits2 = + scale10_round_decimal_long_double (arg, + (int)precision - exponent + 1); + if (digits2 == NULL) + { + free (digits); + END_LONG_DOUBLE_ROUNDING (); + goto out_of_memory; + } + if (strlen (digits2) == precision + 1) + { + free (digits); + digits = digits2; + exponent -= 1; + } + else + free (digits2); + } + /* Here ndigits = precision+1. */ + *p++ = digits[--ndigits]; if ((flags & FLAG_ALT) || precision > 0) { @@ -2966,6 +3006,30 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp, adjusted = 1; } /* Here ndigits = precision. */ + if (is_borderline (digits, precision - 1)) + { + /* Maybe the exponent guess was too high + and a smaller exponent can be reached + by turning a 10...0 into 9...9x. */ + char *digits2 = + scale10_round_decimal_long_double (arg, + (int)(precision - 1) - exponent + 1); + if (digits2 == NULL) + { + free (digits); + END_LONG_DOUBLE_ROUNDING (); + goto out_of_memory; + } + if (strlen (digits2) == precision) + { + free (digits); + digits = digits2; + exponent -= 1; + } + else + free (digits2); + } + /* Here ndigits = precision. */ /* Determine the number of trailing zeroes that have to be dropped. */ @@ -3206,8 +3270,31 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp, exponent += 1; adjusted = 1; } - /* Here ndigits = precision+1. */ + if (is_borderline (digits, precision)) + { + /* Maybe the exponent guess was too high + and a smaller exponent can be reached + by turning a 10...0 into 9...9x. */ + char *digits2 = + scale10_round_decimal_double (arg, + (int)precision - exponent + 1); + if (digits2 == NULL) + { + free (digits); + goto out_of_memory; + } + if (strlen (digits2) == precision + 1) + { + free (digits); + digits = digits2; + exponent -= 1; + } + else + free (digits2); + } + /* Here ndigits = precision+1. */ + *p++ = digits[--ndigits]; if ((flags & FLAG_ALT) || precision > 0) { @@ -3332,6 +3419,29 @@ VASNPRINTF (DCHAR_T *resultbuf, size_t *lengthp, adjusted = 1; } /* Here ndigits = precision. */ + if (is_borderline (digits, precision - 1)) + { + /* Maybe the exponent guess was too high + and a smaller exponent can be reached + by turning a 10...0 into 9...9x. */ + char *digits2 = + scale10_round_decimal_double (arg, + (int)(precision - 1) - exponent + 1); + if (digits2 == NULL) + { + free (digits); + goto out_of_memory; + } + if (strlen (digits2) == precision) + { + free (digits); + digits = digits2; + exponent -= 1; + } + else + free (digits2); + } + /* Here ndigits = precision. */ /* Determine the number of trailing zeroes that have to be dropped. */ |