cline: regex_parser.c@72a98cbcb9f1 (annotated)

regex_parser.c@72a98cbcb9f1 (annotated)

regex_parser.c

Thu, 02 Feb 2012 14:17:35 +0100

author: Mike Becker <universe@uap-core.de>
date: Thu, 02 Feb 2012 14:17:35 +0100
changeset 28: 72a98cbcb9f1
parent 27: 95a958e3de88
child 29: fa625066ae52
permissions: -rw-r--r--

added regex parser

 /*
  * regex_parser.c
  *
  *  Created on: 26.01.2012
  *      Author: fox3049
  */
 #include "regex_parser.h"
 regex_parser_t* new_regex_parser_t() {
   regex_parser_t* ret = malloc(sizeof(regex_parser_t));
   if (ret != NULL) {
     ret->pattern_list = new_string_list_t();
     ret->matched_lines = 0;
     ret->pattern_match = 0;
     ret->compiled_patterns = NULL;
     ret->compiled_pattern_count = 0;
   }
   return ret;
 }
 void regex_destcomppats(regex_parser_t* parser) {
   if (parser->compiled_patterns != NULL) {
     for (int i = 0 ; i < parser->compiled_pattern_count ; i++) {
       if (parser->compiled_patterns[i] != NULL) {
         free(parser->compiled_patterns[i]);
       }
     }
     free(parser->compiled_patterns);
     parser->compiled_patterns = NULL;
     parser->compiled_pattern_count = 0;
   }
 }
 void destroy_regex_parser_t(regex_parser_t* parser) {
   regex_destcomppats(parser);
   destroy_string_list_t(parser->pattern_list);
   free(parser);
 }
 bool regex_parser_matching(regex_parser_t* parser) {
   return parser->pattern_match > 0;
 }
 int regex_parser_do(regex_parser_t* parser, char* input) {
   int err = REG_NOMATCH;
   if (parser->compiled_pattern_count > 0) {
     regmatch_t match;
     if (regex_parser_matching(parser)) {
       parser->matched_lines++;
       err = regexec(parser->compiled_patterns[parser->pattern_match],
           input, 1, &match, 0);
       if (err > 0 && err != REG_NOMATCH) {
         fprintf(stderr, "Regex-Error: 0x%08x", err);
       }
       if (err == 0) {
         parser->pattern_match = 0;
         /* do not match line, if it does not end with the pattern */
         if (match.rm_eo < strlen(input)) {
           parser->matched_lines--;
         }
       }
     } else {
       for (int i = 0 ; i < parser->compiled_pattern_count - 1 ; i += 2) {
         err = regexec(parser->compiled_patterns[i], input, 1, &match, 0);
         if (err > 0 && err != REG_NOMATCH) {
           fprintf(stderr, "Regex-Error: 0x%08x", err);
         }
         if (err == 0) {
           parser->pattern_match = i+1;
           parser->matched_lines = 0;
           /* Check, if end pattern is also in this line */
           regex_parser_do(parser, input);
           /* do not match line, if it does not start with the pattern */
           if (match.rm_so > 0 && parser->matched_lines > 0) {
             parser->matched_lines--;
           }
           break;
         }
       }
     }
   }
   return err;
 }
 bool regex_compile_all(regex_parser_t* parser) {
   bool success = true;
   size_t pcount = parser->pattern_list->count;
   if (pcount > 0) {
     regex_destcomppats(parser);
     parser->compiled_patterns = calloc(pcount, sizeof(regex_t));
     parser->compiled_pattern_count = pcount;
     regex_t* re;
     for (int i = 0 ; i < pcount ; i++) {
       re = malloc(sizeof(regex_t));
       if (regcomp(re, parser->pattern_list->items[i], REG_EXTENDED) == 0) {
         parser->compiled_patterns[i] = re;
       } else {
         fprintf(stderr, "Cannot compile pattern: %s\n",
             (parser->pattern_list->items[i]));
         parser->compiled_patterns[i] = NULL;
         success = false;
       }
     }
   }
   return success;
 }

Mercurial > hg > cline / annotate

regex_parser.c@72a98cbcb9f1 (annotated)

regex_parser.c