cline: src/regex_parser.c@76d46533b9a9

regex parser was not properly reset before each file, sometimes resulting in wrong line counts, when the previous scanned file ended with a match

     1 /*

     2  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.

     3  * Copyright 2017 Mike Becker. All rights reserved.

     4  *

     5  * Redistribution and use in source and binary forms, with or without

     6  * modification, are permitted provided that the following conditions are met:

     7  *

     8  * 1. Redistributions of source code must retain the above copyright

     9  * notice, this list of conditions and the following disclaimer.

    10  *

    11  * 2. Redistributions in binary form must reproduce the above copyright

    12  * notice, this list of conditions and the following disclaimer in the

    13  * documentation and/or other materials provided with the distribution.

    14  *

    15  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"

    16  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

    17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

    18  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

    19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

    20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

    21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

    22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

    23  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

    24  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

    25  *

    26  * regex_parser.c

    27  *

    28  *  Created on: 26.01.2012

    29  *      Author: Mike

    30  */

    32 #include "regex_parser.h"

    34 regex_parser_t* new_regex_parser_t() {

    35   regex_parser_t* ret = malloc(sizeof(regex_parser_t));

    36   if (ret != NULL) {

    37     ret->pattern_list = new_string_list_t();

    38     ret->matched_lines = 0;

    39     ret->pattern_match = 0;

    40     ret->compiled_patterns = NULL;

    41     ret->compiled_pattern_count = 0;

    42   }

    43   return ret;

    44 }

    46 void regex_parser_reset(regex_parser_t* parser) {

    47   parser->pattern_match = parser->matched_lines = 0;

    48 }

    50 void regex_destcomppats(regex_parser_t* parser) {

    51   if (parser->compiled_patterns != NULL) {

    52     for (int i = 0 ; i < parser->compiled_pattern_count ; i++) {

    53       if (parser->compiled_patterns[i] != NULL) {

    54         free(parser->compiled_patterns[i]);

    55       }

    56     }

    57     free(parser->compiled_patterns);

    58     parser->compiled_patterns = NULL;

    59     parser->compiled_pattern_count = 0;

    60   }

    61 }

    63 void destroy_regex_parser_t(regex_parser_t* parser) {

    64   regex_destcomppats(parser);

    65   destroy_string_list_t(parser->pattern_list);

    66   free(parser);

    67 }

    69 bool regex_parser_matching(regex_parser_t* parser) {

    70   return parser->pattern_match > 0;

    71 }

    73 int regex_parser_do(regex_parser_t* parser, char* input) {

    74   int err = REG_NOMATCH;

    75   if (parser->compiled_pattern_count > 0) {

    76     regmatch_t match;

    78     if (regex_parser_matching(parser)) {

    79       parser->matched_lines++;

    81       err = regexec(parser->compiled_patterns[parser->pattern_match],

    82           input, 1, &match, 0);

    83       if (err > 0 && err != REG_NOMATCH) {

    84         fprintf(stderr, "Regex-Error: 0x%08x", err);

    85       }

    86       if (err == 0) {

    87         parser->pattern_match = 0;

    88         /* do not match line, if it does not end with the pattern */

    89         if (match.rm_eo < strlen(input)) {

    90           parser->matched_lines--;

    91         }

    92       }

    93     } else {

    94       for (int i = 0 ; i < parser->compiled_pattern_count - 1 ; i += 2) {

    95         err = regexec(parser->compiled_patterns[i], input, 1, &match, 0);

    96         if (err > 0 && err != REG_NOMATCH) {

    97           fprintf(stderr, "Regex-Error: 0x%08x", err);

    98         }

    99         if (err == 0) {

   100           parser->pattern_match = i+1;

   101           parser->matched_lines = 0;

   102           /* Check, if end pattern is also in this line */

   103           regex_parser_do(parser, input);

   104           /* do not match line, if it does not start with the pattern */

   105           if (match.rm_so > 0 && parser->matched_lines > 0) {

   106             parser->matched_lines--;

   107           }

   108           break;

   109         }

   110       }

   111     }

   112   }

   113   return err;

   114 }

   116 bool regex_compile_all(regex_parser_t* parser) {

   117   bool success = true;

   118   size_t pcount = parser->pattern_list->count;

   119   if (pcount > 0) {

   120     regex_destcomppats(parser);

   121     parser->compiled_patterns = calloc(pcount, sizeof(regex_t));

   122     parser->compiled_pattern_count = pcount;

   124     regex_t* re;

   125     for (int i = 0 ; i < pcount ; i++) {

   126       re = malloc(sizeof(regex_t));

   127       if (regcomp(re, parser->pattern_list->items[i], REG_EXTENDED) == 0) {

   128         parser->compiled_patterns[i] = re;

   129       } else {

   130         fprintf(stderr, "Cannot compile pattern: %s\n",

   131             (parser->pattern_list->items[i]));

   132         parser->compiled_patterns[i] = NULL;

   133         success = false;

   134       }

   135     }

   136   }

   137   return success;

   138 }

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