Thu, 09 Feb 2012 15:56:18 +0100
allow parallel use of -s and -S
universe@27 | 1 | /* |
universe@27 | 2 | * regex_parser.c |
universe@27 | 3 | * |
universe@27 | 4 | * Created on: 26.01.2012 |
universe@29 | 5 | * Author: Mike |
universe@27 | 6 | */ |
universe@27 | 7 | |
universe@27 | 8 | #include "regex_parser.h" |
universe@27 | 9 | |
universe@27 | 10 | regex_parser_t* new_regex_parser_t() { |
universe@27 | 11 | regex_parser_t* ret = malloc(sizeof(regex_parser_t)); |
universe@27 | 12 | if (ret != NULL) { |
universe@27 | 13 | ret->pattern_list = new_string_list_t(); |
universe@27 | 14 | ret->matched_lines = 0; |
universe@27 | 15 | ret->pattern_match = 0; |
universe@27 | 16 | ret->compiled_patterns = NULL; |
universe@28 | 17 | ret->compiled_pattern_count = 0; |
universe@27 | 18 | } |
universe@27 | 19 | return ret; |
universe@27 | 20 | } |
universe@27 | 21 | |
universe@28 | 22 | void regex_destcomppats(regex_parser_t* parser) { |
universe@28 | 23 | if (parser->compiled_patterns != NULL) { |
universe@28 | 24 | for (int i = 0 ; i < parser->compiled_pattern_count ; i++) { |
universe@28 | 25 | if (parser->compiled_patterns[i] != NULL) { |
universe@28 | 26 | free(parser->compiled_patterns[i]); |
universe@28 | 27 | } |
universe@28 | 28 | } |
universe@28 | 29 | free(parser->compiled_patterns); |
universe@28 | 30 | parser->compiled_patterns = NULL; |
universe@28 | 31 | parser->compiled_pattern_count = 0; |
universe@28 | 32 | } |
universe@28 | 33 | } |
universe@28 | 34 | |
universe@27 | 35 | void destroy_regex_parser_t(regex_parser_t* parser) { |
universe@28 | 36 | regex_destcomppats(parser); |
universe@27 | 37 | destroy_string_list_t(parser->pattern_list); |
universe@27 | 38 | free(parser); |
universe@27 | 39 | } |
universe@27 | 40 | |
universe@27 | 41 | bool regex_parser_matching(regex_parser_t* parser) { |
universe@27 | 42 | return parser->pattern_match > 0; |
universe@27 | 43 | } |
universe@27 | 44 | |
universe@28 | 45 | int regex_parser_do(regex_parser_t* parser, char* input) { |
universe@28 | 46 | int err = REG_NOMATCH; |
universe@28 | 47 | if (parser->compiled_pattern_count > 0) { |
universe@28 | 48 | regmatch_t match; |
universe@27 | 49 | |
universe@28 | 50 | if (regex_parser_matching(parser)) { |
universe@28 | 51 | parser->matched_lines++; |
universe@28 | 52 | |
universe@28 | 53 | err = regexec(parser->compiled_patterns[parser->pattern_match], |
universe@28 | 54 | input, 1, &match, 0); |
universe@28 | 55 | if (err > 0 && err != REG_NOMATCH) { |
universe@28 | 56 | fprintf(stderr, "Regex-Error: 0x%08x", err); |
universe@28 | 57 | } |
universe@28 | 58 | if (err == 0) { |
universe@28 | 59 | parser->pattern_match = 0; |
universe@28 | 60 | /* do not match line, if it does not end with the pattern */ |
universe@28 | 61 | if (match.rm_eo < strlen(input)) { |
universe@28 | 62 | parser->matched_lines--; |
universe@28 | 63 | } |
universe@28 | 64 | } |
universe@28 | 65 | } else { |
universe@28 | 66 | for (int i = 0 ; i < parser->compiled_pattern_count - 1 ; i += 2) { |
universe@28 | 67 | err = regexec(parser->compiled_patterns[i], input, 1, &match, 0); |
universe@28 | 68 | if (err > 0 && err != REG_NOMATCH) { |
universe@28 | 69 | fprintf(stderr, "Regex-Error: 0x%08x", err); |
universe@28 | 70 | } |
universe@28 | 71 | if (err == 0) { |
universe@28 | 72 | parser->pattern_match = i+1; |
universe@28 | 73 | parser->matched_lines = 0; |
universe@28 | 74 | /* Check, if end pattern is also in this line */ |
universe@28 | 75 | regex_parser_do(parser, input); |
universe@28 | 76 | /* do not match line, if it does not start with the pattern */ |
universe@28 | 77 | if (match.rm_so > 0 && parser->matched_lines > 0) { |
universe@28 | 78 | parser->matched_lines--; |
universe@28 | 79 | } |
universe@28 | 80 | break; |
universe@28 | 81 | } |
universe@27 | 82 | } |
universe@27 | 83 | } |
universe@27 | 84 | } |
universe@28 | 85 | return err; |
universe@27 | 86 | } |
universe@28 | 87 | |
universe@28 | 88 | bool regex_compile_all(regex_parser_t* parser) { |
universe@28 | 89 | bool success = true; |
universe@28 | 90 | size_t pcount = parser->pattern_list->count; |
universe@28 | 91 | if (pcount > 0) { |
universe@28 | 92 | regex_destcomppats(parser); |
universe@28 | 93 | parser->compiled_patterns = calloc(pcount, sizeof(regex_t)); |
universe@28 | 94 | parser->compiled_pattern_count = pcount; |
universe@28 | 95 | |
universe@28 | 96 | regex_t* re; |
universe@28 | 97 | for (int i = 0 ; i < pcount ; i++) { |
universe@28 | 98 | re = malloc(sizeof(regex_t)); |
universe@28 | 99 | if (regcomp(re, parser->pattern_list->items[i], REG_EXTENDED) == 0) { |
universe@28 | 100 | parser->compiled_patterns[i] = re; |
universe@28 | 101 | } else { |
universe@28 | 102 | fprintf(stderr, "Cannot compile pattern: %s\n", |
universe@28 | 103 | (parser->pattern_list->items[i])); |
universe@28 | 104 | parser->compiled_patterns[i] = NULL; |
universe@28 | 105 | success = false; |
universe@28 | 106 | } |
universe@28 | 107 | } |
universe@28 | 108 | } |
universe@28 | 109 | return success; |
universe@28 | 110 | } |