cline: src/regex_parser.c@be2084398c37 (annotated)

src/regex_parser.c@be2084398c37 (annotated)

src/regex_parser.c

Fri, 03 Jun 2022 20:05:15 +0200

author: Mike Becker <universe@uap-core.de>
date: Fri, 03 Jun 2022 20:05:15 +0200
changeset 66: be2084398c37
parent 57: 68018eac46c3
permissions: -rw-r--r--

new feature: count non-whitespace characters

 /*
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
  * Copyright 2018 Mike Becker. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *
  * 2. Redistributions in binary form must reproduce the above copyright
  * notice, this list of conditions and the following disclaimer in the
  * documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 #include "regex_parser.h"
 #include <ctype.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_counted = 0;
     ret->pattern_match = 0;
     ret->compiled_patterns = NULL;
     ret->compiled_pattern_count = 0;
     ret->count_chars = false;
   }
   return ret;
 }
 void regex_parser_reset(regex_parser_t* parser) {
   parser->pattern_match = parser->matched_counted = 0;
 }
 void regex_destcomppats(regex_parser_t* parser) {
   if (parser->compiled_patterns != NULL) {
     for (unsigned 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;
 }
 static unsigned regex_parser_count_chars(const char* input,
                                          unsigned start, unsigned end) {
   unsigned ret = 0;
   for (unsigned i = start ; i < end ; i++) {
     ret += isspace(input[i]) ? 0 : 1;
   }
   return ret;
 }
 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)) {
       if (parser->count_chars) {
         parser->matched_counted +=
             regex_parser_count_chars(input, 0, strlen(input));
       } else {
         parser->matched_counted++;
       }
       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;
         size_t input_len = strlen(input);
         if (match.rm_eo < input_len) {
           if (parser->count_chars) {
             /* do not exclude chars that occur after pattern end */
             parser->matched_counted -=
                 regex_parser_count_chars(input, match.rm_eo, input_len);
           } else {
             /* do not exclude line, if it does not end with the pattern */
             parser->matched_counted--;
           }
         }
       }
     } else {
       for (unsigned 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) {
           /* a start pattern matches, start counting */
           parser->matched_counted = 0;
           /* Check, if end pattern is also in this line */
           parser->pattern_match = i+1;
           regex_parser_do(parser, input);
           /* If something was found, determine what exactly to exclude */
           if (parser->matched_counted > 0) {
             if (parser->count_chars) {
               /* do not exclude the characters before the pattern */
               parser->matched_counted -=
                   regex_parser_count_chars(input, 0, match.rm_so);
             } else {
               /* do not match line, if it does not start with the pattern */
               if (match.rm_so > 0) {
                 parser->matched_counted--;
               }
             }
           }
           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 (unsigned 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

src/regex_parser.c@be2084398c37 (annotated)

src/regex_parser.c