diff options
Diffstat (limited to 'Bus/Ivy')
| -rw-r--r-- | Bus/Ivy/IvyBinding.cxx | 189 |
1 files changed, 189 insertions, 0 deletions
diff --git a/Bus/Ivy/IvyBinding.cxx b/Bus/Ivy/IvyBinding.cxx new file mode 100644 index 0000000..f3000fd --- /dev/null +++ b/Bus/Ivy/IvyBinding.cxx @@ -0,0 +1,189 @@ +/*
+ * 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: ivybind.c,v 1.9.2.7 2006/06/01 12:07:17 bustico Exp $
+ *
+ * Please refer to file version.h for the
+ * copyright notice regarding this software
+ */
+/* Module de gestion de la syntaxe des messages Ivy */
+#include "IvyStdAfx.h"
+
+#include "IvyBinding.h"
+
+static int err_offset;
+
+#ifdef USE_PCRE
+ static const char *err_buf;
+#else /* we don't USE_PCRE */
+ static char err_buf[4096];
+#endif /* USE_PCRE */
+
+/* classes de messages emis par l'application utilise pour le filtrage */
+static int messages_classes_count = 0;
+static const char **messages_classes = 0;
+/* regexp d'extraction du mot clef des regexp client pour le filtrage des regexp , ca va c'est clair ??? */
+static IvyBinding token_extract;
+
+IvyBinding::IvyBinding()
+{
+#ifdef USE_PCRE
+ regexp = NULL;
+ inspect = NULL;
+#else /* we don't USE_PCRE */
+ free( regexp );
+#endif /* USE_PCRE */
+ nb_match = 0;
+}
+IvyBinding::~IvyBinding()
+{
+#ifdef USE_PCRE
+ if (inspect!=NULL)
+ pcre_free(inspect);
+ if (regexp!=NULL)
+ pcre_free(regexp);
+#else /* we don't USE_PCRE */
+ free( regexp );
+#endif /* USE_PCRE */
+}
+bool IvyBinding::Compile( const char * expression, int *erroffset, const char **errmessage )
+{
+ bool compile = false;
+#ifdef USE_PCRE
+ regexp = pcre_compile(expression, PCRE_CASELESS, &err_buf, &err_offset, NULL);
+ if ( regexp != NULL )
+ {
+ this->inspect = pcre_study(regexp,0,&err_buf);
+ if (err_buf!=NULL)
+ {
+ printf("Error studying %s, message: %s\n",expression,err_buf);
+ }
+ compile = true;
+ }
+ else
+ {
+ *erroffset = err_offset;
+ *errmessage = err_buf;
+ printf("Error compiling '%s', %s\n", expression, err_buf);
+ }
+#else /* we don't USE_PCRE */
+ regex_t regexp;
+ int reg;
+ reg = regcomp(®exp, expression, REGCOMP_OPT|REG_EXTENDED);
+ if ( reg == 0 )
+ {
+ this->next = NULL;
+ }
+ else
+ {
+ regerror (reg, ®exp, err_buf, sizeof(err_buf) );
+ *erroffset = err_offset;
+ *errmessage = err_buf;
+ printf("Error compiling '%s', %s\n", expression, err_buf);
+ }
+#endif /* USE_PCRE */
+ return compile;
+}
+
+
+int IvyBinding::Exec( const char * message )
+{
+#ifdef USE_PCRE
+
+ nb_match = pcre_exec(
+ regexp,
+ inspect,
+ message,
+ strlen(message),
+ 0, /* debut */
+ 0, /* no other regexp option */
+ ovector,
+ OVECSIZE);
+ if (nb_match<1) return 0; /* no match */
+#else /* we don't USE_PCRE */
+ memset( match, -1, sizeof(match )); /* work around bug !!!*/
+ nb_match = regexec (®exp, message, MAX_MSG_FIELDS, match, 0)
+ if (nb_match == REG_NOMATCH)
+ return 0;
+ for ( index = 1; index < MAX_MSG_FIELDS; index++ )
+ {
+ if ( match[i].rm_so != -1 )
+ nb_match++;
+ }
+#endif /* USE_PCRE */
+ return nb_match;
+}
+
+void IvyBinding::Match( const char *message, int argnum, int *arglen, const char **arg)
+{
+#ifdef USE_PCRE
+
+ *arglen = ovector[2*argnum+1]- ovector[2*argnum];
+ *arg = message + ovector[2*argnum];
+#else /* we don't USE_PCRE */
+
+ regmatch_t* p;
+
+ p = &match[argnum+1];
+ if ( p->rm_so != -1 ) {
+ *arglen = p->rm_eo - p->rm_so;
+ *arg = message + p->rm_so;
+ } else { // ARG VIDE
+ *arglen = 0;
+ *arg = NULL;
+ }
+#endif /* USE_PCRE */
+
+}
+
+//filter Expression Bind
+void IvyBinding::SetFilter( int argc, const char **argv)
+{
+ const char *errbuf;
+ int erroffset;
+
+ messages_classes_count = argc;
+ messages_classes = argv;
+ /* compile the token extraction regexp */
+
+ if ( !token_extract.Compile("^\\^([a-zA-Z_0-9-]+).*", & erroffset, & errbuf) )
+ {
+ printf("Error compiling Token Extract regexp: %s\n", errbuf);
+ }
+}
+
+int IvyBinding::Filter(const char *expression)
+{
+ int i;
+ int err;
+ int regexp_ok = 1; /* accepte tout par default */
+ int tokenlen;
+ const char *token;
+
+ if ( *expression =='^' && messages_classes_count !=0 )
+ {
+ regexp_ok = 0;
+
+ /* extract token */
+ err = token_extract.Exec( expression );
+ if ( err < 1 ) return 1;
+ token_extract.Match( expression , 1, &tokenlen, &token );
+ for ( i = 0 ; i < messages_classes_count; i++ )
+ {
+ if (strncmp( messages_classes[i], token, tokenlen ) == 0) {
+ return 1; }
+ // else {
+ //printf ("DBG> %s eliminé [%s]\n", token, expression);
+ //}
+ }
+ }
+ return regexp_ok;
+}
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