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Diffstat (limited to 'src/ivybind.c')
| -rw-r--r-- | src/ivybind.c | 157 |
1 files changed, 157 insertions, 0 deletions
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(®exp, expression, REGCOMP_OPT|REG_EXTENDED); + if ( reg == 0 ) + { + bind = (IvyBinding)malloc( sizeof( struct _binding )); + bind->regexp = regexp; + } + else + { + regerror (reg, ®exp, 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 +}
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