re_test.c

/* $Id$ */
/*
 *
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of ser, a free SIP server.
 *
 * ser is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * For a license to use the ser software under conditions
 * other than those described here, or to purchase support for this
 * software, please contact iptel.org by e-mail at the following addresses:
 *    info@iptel.org
 *
 * ser is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License 
 * along with this program; if not, write to the Free Software 
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*
 * regexec test program (good to find re lib. bugs)
 * uses the same flags as ser/textops for re-matching
 * History:
 * --------
 *  created by andrei
 */



#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <unistd.h>
#include <regex.h>


static char *id="$Id$";
static char *version="re_test 0.1";
static char* help_msg="\
Usage: re_test [-f file] regular_expression \n\
Options:\n\
    -f file       file with the content of a sip packet (max 65k)\n\
    -h            this help message\n\
    -n            non matching list ([^...]) will match newlines\n\
    -s            case sensitive\n\
    -v            increase verbosity\n\
";

#define BUF_SIZE 65535


int main (int argc, char** argv)
{
        int fd;
        char c;
        int n;
        char* re_str;
        char buffer[BUF_SIZE+1]; /* space for null-term. */
        char* buf;
        regex_t re;
        int flags;
        regmatch_t pmatch;
        int match;
        int eflags;
        
        int verbose;
        char *fname;
        
        /* init */
        verbose=0;
        fname=0;
        re_str=0;
        flags=REG_EXTENDED|REG_ICASE|REG_NEWLINE;
        match=0;
        buf=buffer;
        eflags=0;

        opterr=0;
        while ((c=getopt(argc,argv, "f:nsvhV"))!=-1){
                switch(c){
                        case 'f':
                                fname=optarg;
                                break;
                        case 'v':
                                verbose++;
                                break;
                        case 'V':
                                printf("version: %s\n", version);
                                printf("%s\n",id);
                                exit(0);
                                break;
                        case 'h':
                                printf("version: %s\n", version);
                                printf("%s", help_msg);
                                exit(0);
                                break;
                        case 's':
                                flags&=~REG_ICASE;
                                break;
                        case 'n':
                                flags&=~REG_NEWLINE;
                                break;
                        case '?':
                                if (isprint(optopt))
                                        fprintf(stderr, "Unknown option `-%c´\n", optopt);
                                else
                                        fprintf(stderr, "Unknown character `\\x%x´\n", optopt);
                                goto error;
                        case ':':
                                fprintf(stderr, "Option `-%c´ requires an argument.\n",
                                                optopt);
                                goto error;
                                break;
                        default:
                                        abort();
                }
        }
        /* check if we have non-options */
        if (optind < argc){
                re_str=argv[optind];
        }
        
        /* check if all the required params are present */
        if (re_str==0){
                fprintf(stderr, "ERROR: no regular expression specified\n");
                goto error;
        }else{
                if (regcomp(&re, re_str, flags)){
                        fprintf(stderr, "ERROR: bad regular expression <%s>\n", re_str);
                        goto error;
                }
        }
                
        if ((fname!=0 ) &&(strcmp(fname, "-")!=0)){
                /* open packet file */
                fd=open(fname, O_RDONLY);
                if (fd<0){
                        fprintf(stderr, "ERROR: loading packet-file(%s): %s\n", fname,
                                        strerror(errno));
                        goto error;
                }
        }else fd=0;
        n=read(fd, buf, BUF_SIZE);
        if (n<0){
                fprintf(stderr, "ERROR: reading file(%s): %s\n", fname,
                                strerror(errno));
                goto error;
        }
        buf[n]=0; /* null terminate it */
        if (verbose) printf("read %d bytes from file %s\n", n, fname);
        if (fd!=0) close(fd); /* we don't want to close stdin */
        
        while (regexec(&re, buf, 1, &pmatch, eflags)==0){
                eflags|=REG_NOTBOL;
                match++;
                if (pmatch.rm_so==-1){
                        fprintf(stderr, "ERROR: unknown match offset\n");
                        goto error;
                }else{
                        if (verbose){
                                printf("%4d -%4d: ", (int)pmatch.rm_so+buf-buffer,
                                                (int)pmatch.rm_eo+buf-buffer);
                        }
                        printf("%.*s\n", (int)(pmatch.rm_eo-pmatch.rm_so),
                                                                buf+pmatch.rm_so);
                }
                buf+=pmatch.rm_eo;
        }
        if (verbose) printf("\n%d matches\n", match);
        if (match) exit(0);
        else exit(1);
        
error:
        exit(-1);
}