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+# $Id: acinclude.m4,v 1.1 2009/04/10 13:39:22 broeker 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 $hw_cv_func_vsnprintf_c99
+# is set to "yes". Otherwise, define vsnprintf to rpl_vsnprintf and make sure
+# the replacement function will be built.
+AC_DEFUN([HW_FUNC_VSNPRINTF],
+[
+ AC_PREREQ([2.60])dnl 2.59 should work if some AC_TYPE_* macros are replaced.
+ AC_REQUIRE([HW_HEADER_STDARG_H])dnl Our check evaluates HAVE_STDARG_H.
+ AC_CHECK_FUNC([vsnprintf],
+ [hw_cv_func_vsnprintf=yes],
+ [hw_cv_func_vsnprintf=no])
+ AS_IF([test "$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.])],
+ [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 $hw_cv_func_snprintf_c99
+# is set to "yes". Otherwise, define snprintf to rpl_snprintf and make sure
+# the replacement function will be built.
+AC_DEFUN([HW_FUNC_SNPRINTF],
+[
+ AC_REQUIRE([HW_FUNC_VSNPRINTF])dnl Our snprintf(3) calls vsnprintf(3).
+ AC_CHECK_FUNC([snprintf],
+ [hw_cv_func_snprintf=yes],
+ [hw_cv_func_snprintf=no])
+ AS_IF([test "$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])
+ 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
+# $hw_cv_func_vasprintf is set to "yes". Otherwise, define vasprintf to
+# rpl_vasprintf and make sure the replacement function will be built.
+AC_DEFUN([HW_FUNC_VASPRINTF],
+[
+ AC_REQUIRE([HW_FUNC_VSNPRINTF])dnl Our vasprintf(3) calls vsnprintf(3).
+ AC_CHECK_FUNCS([vasprintf],
+ [hw_cv_func_vasprintf=yes],
+ [hw_cv_func_vasprintf=no])
+ AS_IF([test "$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
+# $hw_cv_func_asprintf is set to "yes". Otherwise, define asprintf to
+# rpl_asprintf and make sure the replacement function will be built.
+AC_DEFUN([HW_FUNC_ASPRINTF],
+[
+ AC_REQUIRE([HW_FUNC_VASPRINTF])dnl Our asprintf(3) calls vasprintf(3).
+ AC_CHECK_FUNCS([asprintf],
+ [hw_cv_func_asprintf=yes],
+ [hw_cv_func_asprintf=no])
+ AS_IF([test "$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: