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m4/snprintf.m4
263 строки
9 KB
brarcher
Add configure option to force snprintf replacement
15 окт 2013, 03:03
15 окт 2013, 03:03
c2c6eb4
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# $Id: snprintf.m4,v 1.1.1.1 2008/01/06 03:24:00 holger Exp $ # Copyright (c) 2008 Holger Weiss <holger@jhweiss.de>. # # This code may freely be used, modified and/or redistributed for any purpose. # It would be nice if additions and fixes to this file (including trivial code # cleanups) would be sent back in order to let me include them in the version # available at <http://www.jhweiss.de/software/snprintf.html>. However, this is # not a requirement for using or redistributing (possibly modified) versions of # this file, nor is leaving this notice intact mandatory. # HW_HEADER_STDARG_H # ------------------ # Define HAVE_STDARG_H to 1 if <stdarg.h> is available. AC_DEFUN([HW_HEADER_STDARG_H], [ AC_PREREQ([2.60])dnl Older releases should work if AC_CHECK_HEADERS is used. AC_CHECK_HEADERS_ONCE([stdarg.h]) ])# HW_HEADER_STDARG_H # HW_HEADER_VARARGS_H # ------------------- # Define HAVE_VARARGS_H to 1 if <varargs.h> is available. AC_DEFUN([HW_HEADER_VARARGS_H], [ AC_PREREQ([2.60])dnl Older releases should work if AC_CHECK_HEADERS is used. AC_CHECK_HEADERS_ONCE([varargs.h]) ])# HW_HEADER_VARARGS_H # HW_FUNC_VA_COPY # --------------- # Set $hw_cv_func_va_copy to "yes" or "no". Define HAVE_VA_COPY to 1 if # $hw_cv_func_va_copy is set to "yes". Note that it's "unspecified whether # va_copy and va_end are macros or identifiers declared with external linkage." # (C99: 7.15.1, 1) Therefore, the presence of va_copy(3) cannot simply "be # tested with #ifdef", as suggested by the Autoconf manual (5.5.1). AC_DEFUN([HW_FUNC_VA_COPY], [ AC_REQUIRE([HW_HEADER_STDARG_H])dnl Our check evaluates HAVE_STDARG_H. AC_REQUIRE([HW_HEADER_VARARGS_H])dnl Our check evaluates HAVE_VARARGS_H. AC_CACHE_CHECK([for va_copy], [hw_cv_func_va_copy], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#if HAVE_STDARG_H #include <stdarg.h> #elif HAVE_VARARGS_H #include <varargs.h> #endif]], [[va_list ap, aq; va_copy(aq, ap);]])], [hw_cv_func_va_copy=yes], [hw_cv_func_va_copy=no], [hw_cv_func_va_copy=no])]) AS_IF([test "$hw_cv_func_va_copy" = yes], [AC_DEFINE([HAVE_VA_COPY], [1], [Define to 1 if you have the `va_copy' function or macro.])]) ])# HW_FUNC_VA_COPY # HW_FUNC___VA_COPY # ----------------- # Set $hw_cv_func___va_copy to "yes" or "no". Define HAVE___VA_COPY to 1 if # $hw_cv_func___va_copy is set to "yes". AC_DEFUN([HW_FUNC___VA_COPY], [ AC_REQUIRE([HW_HEADER_STDARG_H])dnl Our check evaluates HAVE_STDARG_H. AC_REQUIRE([HW_HEADER_VARARGS_H])dnl Our check evaluates HAVE_VARARGS_H. AC_CACHE_CHECK([for __va_copy], [hw_cv_func___va_copy], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#if HAVE_STDARG_H #include <stdarg.h> #elif HAVE_VARARGS_H #include <varargs.h> #endif]], [[va_list ap, aq; __va_copy(aq, ap);]])], [hw_cv_func___va_copy=yes], [hw_cv_func___va_copy=no], [hw_cv_func___va_copy=no])]) AS_IF([test "$hw_cv_func___va_copy" = yes], [AC_DEFINE([HAVE___VA_COPY], [1], [Define to 1 if you have the `__va_copy' function or macro.])]) ])# HW_FUNC___VA_COPY # HW_FUNC_VSNPRINTF # ----------------- # Set $hw_cv_func_vsnprintf and $hw_cv_func_vsnprintf_c99 to "yes" or "no", # respectively. Define HAVE_VSNPRINTF to 1 only if $hw_cv_func_vsnprintf_c99 # is set to "yes". Otherwise, define vsnprintf to rpl_vsnprintf and make sure # the replacement function will be built. # # If enable_snprintf_replacement=true, the replacement is forced to be built. AC_DEFUN([HW_FUNC_VSNPRINTF], [ AC_PREREQ([2.60])dnl 2.59 should work if some AC_TYPE_* macros are replaced. AC_REQUIRE([HW_HEADER_STDARG_H])dnl Our check evaluates HAVE_STDARG_H. if test "xtrue" != x"$enable_snprintf_replacement"; then AC_CHECK_FUNC([vsnprintf], [hw_cv_func_vsnprintf=yes], [hw_cv_func_vsnprintf=no]) AS_IF([test "$hw_cv_func_vsnprintf" = yes], [AC_CACHE_CHECK([whether vsnprintf is C99 compliant], [hw_cv_func_vsnprintf_c99], [AC_RUN_IFELSE( [AC_LANG_PROGRAM( [[#if HAVE_STDARG_H #include <stdarg.h> #endif #include <stdio.h> static int testprintf(char *buf, size_t size, const char *format, ...) { int result; va_list ap; va_start(ap, format); result = vsnprintf(buf, size, format, ap); va_end(ap); return result; }]], [[char buf[43]; if (testprintf(buf, 4, "The answer is %27.2g.", 42.0) != 42 || testprintf(buf, 0, "No, it's %32zu.", (size_t)42) != 42 || buf[0] != 'T' || buf[3] != '\0') return 1;]])], [hw_cv_func_vsnprintf_c99=yes], [hw_cv_func_vsnprintf_c99=no], [hw_cv_func_vsnprintf_c99=no])])], [hw_cv_func_snprintf_c99=no]) AS_IF([test "$hw_cv_func_vsnprintf_c99" = yes], [AC_DEFINE([HAVE_VSNPRINTF], [1], [Define to 1 if you have a C99 compliant 'vsnprintf' function.])]) else hw_cv_func_vsnprintf_c99=no fi AS_IF([test "$hw_cv_func_vsnprintf_c99" = no], [AC_DEFINE([vsnprintf], [rpl_vsnprintf], [Define to rpl_vsnprintf if the replacement function should be used.]) AC_CHECK_HEADERS([inttypes.h locale.h stddef.h stdint.h]) AC_CHECK_MEMBERS([struct lconv.decimal_point, struct lconv.thousands_sep], [], [], [#include <locale.h>]) AC_TYPE_LONG_DOUBLE AC_TYPE_LONG_LONG_INT AC_TYPE_UNSIGNED_LONG_LONG_INT AC_TYPE_SIZE_T AC_TYPE_INTMAX_T AC_TYPE_UINTMAX_T AC_TYPE_UINTPTR_T AC_CHECK_TYPES([ptrdiff_t]) AC_CHECK_FUNCS([localeconv]) _HW_FUNC_XPRINTF_REPLACE]) ])# HW_FUNC_VSNPRINTF # HW_FUNC_SNPRINTF # ---------------- # Set $hw_cv_func_snprintf and $hw_cv_func_snprintf_c99 to "yes" or "no", # respectively. Define HAVE_SNPRINTF to 1 only if $hw_cv_func_snprintf_c99 # is set to "yes". Otherwise, define snprintf to rpl_snprintf and make sure # the replacement function will be built. # # If enable_snprintf_replacement=true, the replacement is forced to be built. AC_DEFUN([HW_FUNC_SNPRINTF], [ AC_REQUIRE([HW_FUNC_VSNPRINTF])dnl Our snprintf(3) calls vsnprintf(3). if test "xtrue" != x"$enable_snprintf_replacement"; then AC_CHECK_FUNC([snprintf], [hw_cv_func_snprintf=yes], [hw_cv_func_snprintf=no]) AS_IF([test "$hw_cv_func_snprintf" = yes], [AC_CACHE_CHECK([whether snprintf is C99 compliant], [hw_cv_func_snprintf_c99], [AC_RUN_IFELSE( [AC_LANG_PROGRAM([[#include <stdio.h>]], [[char buf[43]; if (snprintf(buf, 4, "The answer is %27.2g.", 42.0) != 42 || snprintf(buf, 0, "No, it's %32zu.", (size_t)42) != 42 || buf[0] != 'T' || buf[3] != '\0') return 1;]])], [hw_cv_func_snprintf_c99=yes], [hw_cv_func_snprintf_c99=no], [hw_cv_func_snprintf_c99=no])])], [hw_cv_func_snprintf_c99=no]) else hw_cv_func_snprintf_c99=no fi AS_IF([test "$hw_cv_func_snprintf_c99" = yes], [AC_DEFINE([HAVE_SNPRINTF], [1], [Define to 1 if you have a C99 compliant 'snprintf' function.])], [AC_DEFINE([snprintf], [rpl_snprintf], [Define to rpl_snprintf if the replacement function should be used.]) _HW_FUNC_XPRINTF_REPLACE]) ])# HW_FUNC_SNPRINTF # HW_FUNC_VASPRINTF # ----------------- # Set $hw_cv_func_vasprintf to "yes" or "no". Define HAVE_VASPRINTF to 1 if # $hw_cv_func_vasprintf is set to "yes". Otherwise, define vasprintf to # rpl_vasprintf and make sure the replacement function will be built. # # If enable_snprintf_replacement=true, the replacement is forced to be built. AC_DEFUN([HW_FUNC_VASPRINTF], [ AC_REQUIRE([HW_FUNC_VSNPRINTF])dnl Our vasprintf(3) calls vsnprintf(3). if test "xtrue" != x"$enable_snprintf_replacement"; then AC_CHECK_FUNCS([vasprintf], [hw_cv_func_vasprintf=yes], [hw_cv_func_vasprintf=no]) else hw_cv_func_vasprintf=no fi AS_IF([test "$hw_cv_func_vasprintf" = no], [AC_DEFINE([vasprintf], [rpl_vasprintf], [Define to rpl_vasprintf if the replacement function should be used.]) AC_CHECK_HEADERS([stdlib.h]) HW_FUNC_VA_COPY AS_IF([test "$hw_cv_func_va_copy" = no], [HW_FUNC___VA_COPY]) _HW_FUNC_XPRINTF_REPLACE]) ])# HW_FUNC_VASPRINTF # HW_FUNC_ASPRINTF # ---------------- # Set $hw_cv_func_asprintf to "yes" or "no". Define HAVE_ASPRINTF to 1 if # $hw_cv_func_asprintf is set to "yes". Otherwise, define asprintf to # rpl_asprintf and make sure the replacement function will be built. # # If enable_snprintf_replacement=true, the replacement is forced to be built. AC_DEFUN([HW_FUNC_ASPRINTF], [ AC_REQUIRE([HW_FUNC_VASPRINTF])dnl Our asprintf(3) calls vasprintf(3). if test "xtrue" != x"$enable_snprintf_replacement"; then AC_CHECK_FUNCS([asprintf], [hw_cv_func_asprintf=yes], [hw_cv_func_asprintf=no]) else hw_cv_func_asprintf=no fi AS_IF([test "$hw_cv_func_asprintf" = no], [AC_DEFINE([asprintf], [rpl_asprintf], [Define to rpl_asprintf if the replacement function should be used.]) _HW_FUNC_XPRINTF_REPLACE]) ])# HW_FUNC_ASPRINTF # _HW_FUNC_XPRINTF_REPLACE # ------------------------ # Arrange for building snprintf.c. Must be called if one or more of the # functions provided by snprintf.c are needed. AC_DEFUN([_HW_FUNC_XPRINTF_REPLACE], [ AS_IF([test "x$_hw_cv_func_xprintf_replace_done" != xyes], [AC_C_CONST HW_HEADER_STDARG_H AC_LIBOBJ([snprintf]) _hw_cv_func_xprintf_replace_done=yes]) ])# _HW_FUNC_XPRINTF_REPLACE dnl vim: set joinspaces textwidth=80: