From 2a38273b4212c38e66af99c8c3b6e9335dc64cb2 Mon Sep 17 00:00:00 2001
From: fcolin
Date: Fri, 3 Jun 2005 16:43:22 +0000
Subject: separation du code regexp dans un module a part en vue de
 l'implementation des bindings simple!

---
 src/ivybind.c | 157 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 157 insertions(+)
 create mode 100644 src/ivybind.c

(limited to 'src/ivybind.c')

diff --git a/src/ivybind.c b/src/ivybind.c
new file mode 100644
index 0000000..1a9d49a
--- /dev/null
+++ b/src/ivybind.c
@@ -0,0 +1,157 @@
+/*
+ *	Ivy, C interface
+ *
+ *	Copyright (C) 1997-2000
+ *	Centre d'Études de la Navigation Aérienne
+ *
+ *	Bind syntax for extracting message comtent 
+ *  using regexp or other 
+ *
+ *	Authors: François-Régis Colin <fcolin@cena.fr>
+ *
+ *	$Id$
+ * 
+ *	Please refer to file version.h for the
+ *	copyright notice regarding this software
+ */
+/* Module de gestion de la syntaxe des messages Ivy */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <time.h>
+#include <stdlib.h>
+#include <memory.h> 
+
+#ifndef USE_PCRE_REGEX
+#include <regex.h>
+#else
+#define OVECSIZE 60 /* must be multiple of 3, for regexp return */
+#include <pcre.h>
+#endif
+
+#include "list.h"
+#include "ivybind.h"
+
+#ifndef USE_PCRE_REGEX
+	static int erroroffset;
+	static char errbuf[4096];
+#else
+	static const char *errbuf;
+	static int erroffset;
+#endif
+
+struct _binding {
+	struct _timer *next;
+#ifndef USE_PCRE_REGEX
+	regex_t regexp;						/* la regexp sous forme machine */
+	regmatch_t match[MAX_MSG_FIELDS+1];	/* resultat du match */
+#else
+	pcre *regexp;
+	pcre_extra *inspect;
+	int ovector[OVECSIZE];
+#endif
+	};
+
+IvyBinding IvyBindingCompile( const char * expression )
+{
+	IvyBinding bind=0;
+#ifdef USE_PCRE_REGEX
+	pcre *regexp;
+	regexp = pcre_compile(expression, PCRE_OPT,&errbuf,&erroffset,NULL);
+	if ( regexp != NULL )
+		{
+			bind = (IvyBinding)malloc( sizeof( struct _binding ));
+			bind->regexp = regexp;
+			bind->inspect = pcre_study(regexp,0,&errbuf);
+			if (errbuf!=NULL)
+				{
+					printf("Error studying %s, message: %s\n",expression,errbuf);
+				}
+		}
+		else
+		{
+		printf("Error compiling '%s', %s\n", expression, errbuf);
+		}
+#else
+	regex_t regexp;
+	int reg;
+	reg = regcomp(&regexp, expression, REGCOMP_OPT|REG_EXTENDED);
+	if ( reg == 0 )
+		{
+			bind = (IvyBinding)malloc( sizeof( struct _binding ));
+			bind->regexp = regexp;
+		}
+		else
+		{
+		regerror (reg, &regexp, errbuf, sizeof(errbuf) );
+		erroroffset = 0; // TODO unkown offset error
+		printf("Error compiling '%s', %s\n", expression, errbuf);
+		}
+#endif
+	return bind;
+}
+void IvyBindingGetCompileError( int *offset, const char **errmessage )
+{
+#ifndef USE_PCRE_REGEX
+	*offset = erroroffset;
+	*errmessage = errbuf;
+#else
+	*offset = erroffset;
+	*errmessage = errbuf;
+#endif
+}
+void IvyBindingFree( IvyBinding bind )
+{
+#ifdef USE_PCRE_REGEX
+				if (bind->inspect!=NULL) pcre_free(bind->inspect);
+				pcre_free(bind->regexp);
+#else
+#endif
+	free ( bind );
+}
+int IvyBindExec( IvyBinding bind, const char * message )
+{
+	int nb_match = 0;
+#ifdef USE_PCRE_REGEX
+	
+	nb_match = pcre_exec(
+					bind->regexp,
+					bind->inspect,
+					message,
+					strlen(message),
+					0, /* debut */
+					0, /* no other regexp option */
+					bind->ovector,
+					OVECSIZE);
+	if (nb_match<1) return 0; /* no match */
+	nb_match--; // firts arg wall string ???
+
+#else
+	memset( bind->match, -1, sizeof(bind->match )); /* work around bug !!!*/
+	nb_match = regexec (&bind->regexp, message, MAX_MSG_FIELDS, bind->match, 0) 
+	if (nb_match != 0)
+		return 0;
+#endif
+	return nb_match;
+}
+void IvyBindingGetMatch( IvyBinding bind, const char *message, int index, const char **arg, int *arglen )
+{
+	index++; // firts arg wall string ???
+#ifdef USE_PCRE_REGEX
+		*arglen = bind->ovector[2*index+1]- bind->ovector[2*index];
+		*arg =   message + bind->ovector[2*index];
+#else  /* we don't USE_PCRE_REGEX */
+
+	regmatch_t* p;
+
+	p = &bind->match[index];
+	if ( p->rm_so != -1 ) {
+			*arglen = p->rm_eo - p->rm_so;
+			*arg = message + p->rm_so;
+	} else { // ARG VIDE
+			*arglen = 0;
+			*arg = message;
+	}
+
+#endif
+}
\ No newline at end of file
-- 
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