diff options
Diffstat (limited to 'src/simple_pattern.c')
| -rw-r--r-- | src/simple_pattern.c | 260 |
1 files changed, 0 insertions, 260 deletions
diff --git a/src/simple_pattern.c b/src/simple_pattern.c deleted file mode 100644 index 747b5150a..000000000 --- a/src/simple_pattern.c +++ /dev/null @@ -1,260 +0,0 @@ -#include "common.h" - -struct simple_pattern { - const char *match; - size_t len; - - SIMPLE_PREFIX_MODE mode; - char negative; - - struct simple_pattern *child; - - struct simple_pattern *next; -}; - -static inline struct simple_pattern *parse_pattern(char *str, SIMPLE_PREFIX_MODE default_mode) { - // fprintf(stderr, "PARSING PATTERN: '%s'\n", str); - - SIMPLE_PREFIX_MODE mode; - struct simple_pattern *child = NULL; - - char *s = str, *c = str; - - // skip asterisks in front - while(*c == '*') c++; - - // find the next asterisk - while(*c && *c != '*') c++; - - // do we have an asterisk in the middle? - if(*c == '*' && c[1] != '\0') { - // yes, we have - child = parse_pattern(c, default_mode); - c[1] = '\0'; - } - - // check what this one matches - - size_t len = strlen(s); - if(len >= 2 && *s == '*' && s[len - 1] == '*') { - s[len - 1] = '\0'; - s++; - mode = SIMPLE_PATTERN_SUBSTRING; - } - else if(len >= 1 && *s == '*') { - s++; - mode = SIMPLE_PATTERN_SUFFIX; - } - else if(len >= 1 && s[len - 1] == '*') { - s[len - 1] = '\0'; - mode = SIMPLE_PATTERN_PREFIX; - } - else - mode = default_mode; - - // allocate the structure - struct simple_pattern *m = callocz(1, sizeof(struct simple_pattern)); - if(*s) { - m->match = strdupz(s); - m->len = strlen(m->match); - m->mode = mode; - } - else { - m->mode = SIMPLE_PATTERN_SUBSTRING; - } - - m->child = child; - - return m; -} - -SIMPLE_PATTERN *simple_pattern_create(const char *list, const char *separators, SIMPLE_PREFIX_MODE default_mode) { - struct simple_pattern *root = NULL, *last = NULL; - - if(unlikely(!list || !*list)) return root; - - int isseparator[256] = { - [' '] = 1 // space - , ['\t'] = 1 // tab - , ['\r'] = 1 // carriage return - , ['\n'] = 1 // new line - , ['\f'] = 1 // form feed - , ['\v'] = 1 // vertical tab - }; - - if (unlikely(separators && *separators)) { - memset(&isseparator[0], 0, sizeof(isseparator)); - while(*separators) isseparator[(unsigned char)*separators++] = 1; - } - - char *buf = mallocz(strlen(list) + 1); - const char *s = list; - - while(s && *s) { - buf[0] = '\0'; - char *c = buf; - - char negative = 0; - - // skip all spaces - while(isseparator[(unsigned char)*s]) - s++; - - if(*s == '!') { - negative = 1; - s++; - } - - // empty string - if(unlikely(!*s)) - break; - - // find the next space - char escape = 0; - while(*s) { - if(*s == '\\' && !escape) { - escape = 1; - s++; - } - else { - if (isseparator[(unsigned char)*s] && !escape) { - s++; - break; - } - - *c++ = *s++; - escape = 0; - } - } - - // terminate our string - *c = '\0'; - - // if we matched the empty string, skip it - if(unlikely(!*buf)) - continue; - - // fprintf(stderr, "FOUND PATTERN: '%s'\n", buf); - struct simple_pattern *m = parse_pattern(buf, default_mode); - m->negative = negative; - - // link it at the end - if(unlikely(!root)) - root = last = m; - else { - last->next = m; - last = m; - } - } - - freez(buf); - return (SIMPLE_PATTERN *)root; -} - -static inline char *add_wildcarded(const char *matched, size_t matched_size, char *wildcarded, size_t *wildcarded_size) { - //if(matched_size) { - // char buf[matched_size + 1]; - // strncpyz(buf, matched, matched_size); - // fprintf(stderr, "ADD WILDCARDED '%s' of length %zu\n", buf, matched_size); - //} - - if(unlikely(wildcarded && *wildcarded_size && matched && *matched && matched_size)) { - size_t wss = *wildcarded_size - 1; - size_t len = (matched_size < wss)?matched_size:wss; - if(likely(len)) { - strncpyz(wildcarded, matched, len); - - *wildcarded_size -= len; - return &wildcarded[len]; - } - } - - return wildcarded; -} - -static inline int match_pattern(struct simple_pattern *m, const char *str, size_t len, char *wildcarded, size_t *wildcarded_size) { - char *s; - - if(m->len <= len) { - switch(m->mode) { - case SIMPLE_PATTERN_SUBSTRING: - if(!m->len) return 1; - if((s = strstr(str, m->match))) { - wildcarded = add_wildcarded(str, s - str, wildcarded, wildcarded_size); - if(!m->child) { - wildcarded = add_wildcarded(&s[m->len], len - (&s[m->len] - str), wildcarded, wildcarded_size); - return 1; - } - return match_pattern(m->child, &s[m->len], len - (s - str) - m->len, wildcarded, wildcarded_size); - } - break; - - case SIMPLE_PATTERN_PREFIX: - if(unlikely(strncmp(str, m->match, m->len) == 0)) { - if(!m->child) { - wildcarded = add_wildcarded(&str[m->len], len - m->len, wildcarded, wildcarded_size); - return 1; - } - return match_pattern(m->child, &str[m->len], len - m->len, wildcarded, wildcarded_size); - } - break; - - case SIMPLE_PATTERN_SUFFIX: - if(unlikely(strcmp(&str[len - m->len], m->match) == 0)) { - wildcarded = add_wildcarded(str, len - m->len, wildcarded, wildcarded_size); - if(!m->child) return 1; - return 0; - } - break; - - case SIMPLE_PATTERN_EXACT: - default: - if(unlikely(strcmp(str, m->match) == 0)) { - if(!m->child) return 1; - return 0; - } - break; - } - } - - return 0; -} - -int simple_pattern_matches_extract(SIMPLE_PATTERN *list, const char *str, char *wildcarded, size_t wildcarded_size) { - struct simple_pattern *m, *root = (struct simple_pattern *)list; - - if(unlikely(!root || !str || !*str)) return 0; - - size_t len = strlen(str); - for(m = root; m ; m = m->next) { - char *ws = wildcarded; - size_t wss = wildcarded_size; - if(unlikely(ws)) *ws = '\0'; - - if (match_pattern(m, str, len, ws, &wss)) { - - //if(ws && wss) - // fprintf(stderr, "FINAL WILDCARDED '%s' of length %zu\n", ws, strlen(ws)); - - if (m->negative) return 0; - return 1; - } - } - - return 0; -} - -static inline void free_pattern(struct simple_pattern *m) { - if(!m) return; - - free_pattern(m->child); - free_pattern(m->next); - freez((void *)m->match); - freez(m); -} - -void simple_pattern_free(SIMPLE_PATTERN *list) { - if(!list) return; - - free_pattern(((struct simple_pattern *)list)); -} |