+++ /dev/null
-/* $Cambridge: exim/src/src/pcre/pcre_version.c,v 1.6 2007/11/12 13:02:20 nm4 Exp $ */
-
-/*************************************************
-* Perl-Compatible Regular Expressions *
-*************************************************/
-
-/* PCRE is a library of functions to support regular expressions whose syntax
-and semantics are as close as possible to those of the Perl 5 language.
-
- Written by Philip Hazel
- Copyright (c) 1997-2007 University of Cambridge
-
------------------------------------------------------------------------------
-Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:
-
- * Redistributions of source code must retain the above copyright notice,
- this list of conditions and the following disclaimer.
-
- * Redistributions in binary form must reproduce the above copyright
- notice, this list of conditions and the following disclaimer in the
- documentation and/or other materials provided with the distribution.
-
- * Neither the name of the University of Cambridge nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
-
-THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
-AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
-LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
-CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
-SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
-INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
-CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
-ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
-POSSIBILITY OF SUCH DAMAGE.
------------------------------------------------------------------------------
-*/
-
-
-/* This module contains the external function pcre_version(), which returns a
-string that identifies the PCRE version that is in use. */
-
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-
-#include "pcre_internal.h"
-
-
-/*************************************************
-* Return version string *
-*************************************************/
-
-/* These macros are the standard way of turning unquoted text into C strings.
-They allow macros like PCRE_MAJOR to be defined without quotes, which is
-convenient for user programs that want to test its value. */
-
-#define STRING(a) # a
-#define XSTRING(s) STRING(s)
-
-/* A problem turned up with PCRE_PRERELEASE, which is defined empty for
-production releases. Originally, it was used naively in this code:
-
- return XSTRING(PCRE_MAJOR)
- "." XSTRING(PCRE_MINOR)
- XSTRING(PCRE_PRERELEASE)
- " " XSTRING(PCRE_DATE);
-
-However, when PCRE_PRERELEASE is empty, this leads to an attempted expansion of
-STRING(). The C standard states: "If (before argument substitution) any
-argument consists of no preprocessing tokens, the behavior is undefined." It
-turns out the gcc treats this case as a single empty string - which is what we
-really want - but Visual C grumbles about the lack of an argument for the
-macro. Unfortunately, both are within their rights. To cope with both ways of
-handling this, I had resort to some messy hackery that does a test at run time.
-I could find no way of detecting that a macro is defined as an empty string at
-pre-processor time. This hack uses a standard trick for avoiding calling
-the STRING macro with an empty argument when doing the test. */
-
-PCRE_EXP_DEFN const char *
-pcre_version(void)
-{
-return (XSTRING(Z PCRE_PRERELEASE)[1] == 0)?
- XSTRING(PCRE_MAJOR.PCRE_MINOR PCRE_DATE) :
- XSTRING(PCRE_MAJOR.PCRE_MINOR) XSTRING(PCRE_PRERELEASE PCRE_DATE);
-}
-
-/* End of pcre_version.c */
git://git.exim.org / exim.git / blobdiff