Add estream code from GnuPG.

* src/estream-printf.c, src/estream-printf.h: New.
* src/estream.c, src/estream.h: New.
* m4/estream.m4: New.
* src/Makefile.am (libgpg_error_la_SOURCES): Add new files.
* configure.ac (AH_BOTTOM): Define estream prefix.
<gcc>: Add useful gcc warning options.
(estream_INIT): Call.
--

This is the base line patch to move the estream code from GnuPG to
libgpg-error.  The code has been taken from the GnuPG repository at
commit cb680c5ea540738692a5c74951802b0fdc658e85.

Signed-off-by: Werner Koch <wk@gnupg.org>

2 files changed, 50 insertions, 1 deletions

diff --git a/m4/Makefile.am b/m4/Makefile.am
index 9c2b1e2..2f16e46 100644
--- a/m4/Makefile.am
+++ b/m4/Makefile.am
@@ -1,3 +1,3 @@
 EXTRA_DIST = inttypes-h.m4 lock.m4 visibility.m4 glibc2.m4 intmax.m4 longdouble.m4 longlong.m4 printf-posix.m4 signed.m4 size_max.m4 wchar_t.m4 wint_t.m4 xsize.m4 ac_prog_cc_for_build.m4 nls.m4 po.m4  codeset.m4 gettext.m4 glibc21.m4 iconv.m4 intdiv0.m4 inttypes.m4 inttypes_h.m4 inttypes-pri.m4 isc-posix.m4 lcmessage.m4 lib-ld.m4 lib-link.m4 lib-prefix.m4 progtest.m4 stdint_h.m4 uintmax_t.m4 ulonglong.m4
 
-EXTRA_DIST += autobuild.m4
+EXTRA_DIST += autobuild.m4 estream.m4
diff --git a/m4/estream.m4 b/m4/estream.m4
new file mode 100644
index 0000000..92ddead
--- /dev/null
+++ b/m4/estream.m4
@@ -0,0 +1,49 @@
+dnl Autoconf macros for libestream
+dnl       Copyright (C) 2007 g10 Code GmbH
+dnl
+dnl This file is free software; as a special exception the author gives
+dnl unlimited permission to copy and/or distribute it, with or without
+dnl modifications, as long as this notice is preserved.
+dnl
+dnl This file is distributed in the hope that it will be useful, but
+dnl WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
+dnl implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+
+
+dnl estream_PRINTF_INIT
+dnl Prepare build of source included estream-printf.c
+dnl
+AC_DEFUN([estream_PRINTF_INIT],
+[
+  AC_MSG_NOTICE([checking system features for estream-printf])
+  AC_CHECK_HEADERS(stdint.h)
+  AC_TYPE_LONG_LONG_INT
+  AC_TYPE_LONG_DOUBLE
+  AC_TYPE_INTMAX_T
+  AC_TYPE_UINTMAX_T
+  AC_CHECK_TYPES([ptrdiff_t])
+  AC_CHECK_SIZEOF([unsigned long])
+  AC_CHECK_SIZEOF([void *])
+  AC_CACHE_CHECK([for nl_langinfo and THOUSANDS_SEP],
+                  estream_cv_langinfo_thousands_sep,
+      [AC_TRY_LINK([#include <langinfo.h>],
+        [char* cs = nl_langinfo(THOUSANDS_SEP); return !cs;],
+        estream_cv_langinfo_thousands_sep=yes,
+        estream_cv_langinfo_thousands_sep=no)
+      ])
+  if test $estream_cv_langinfo_thousands_sep = yes; then
+    AC_DEFINE(HAVE_LANGINFO_THOUSANDS_SEP, 1,
+      [Define if you have <langinfo.h> and nl_langinfo(THOUSANDS_SEP).])
+  fi
+])
+
+
+dnl estream_INIT
+dnl Prepare build of source included estream.c
+dnl
+AC_DEFUN([estream_INIT],
+[
+  AC_REQUIRE([estream_PRINTF_INIT])
+  AC_MSG_NOTICE([checking system features for estream])
+
+])