diff options
Diffstat (limited to 'dir.c')
| -rw-r--r-- | dir.c | 192 |
1 files changed, 126 insertions, 66 deletions
@@ -308,42 +308,69 @@ static int no_wildcard(const char *string) return string[simple_length(string)] == '\0'; } +void parse_exclude_pattern(const char **pattern, + int *patternlen, + int *flags, + int *nowildcardlen) +{ + const char *p = *pattern; + size_t i, len; + + *flags = 0; + if (*p == '!') { + *flags |= EXC_FLAG_NEGATIVE; + p++; + } + len = strlen(p); + if (len && p[len - 1] == '/') { + len--; + *flags |= EXC_FLAG_MUSTBEDIR; + } + for (i = 0; i < len; i++) { + if (p[i] == '/') + break; + } + if (i == len) + *flags |= EXC_FLAG_NODIR; + *nowildcardlen = simple_length(p); + /* + * we should have excluded the trailing slash from 'p' too, + * but that's one more allocation. Instead just make sure + * nowildcardlen does not exceed real patternlen + */ + if (*nowildcardlen > len) + *nowildcardlen = len; + if (*p == '*' && no_wildcard(p + 1)) + *flags |= EXC_FLAG_ENDSWITH; + *pattern = p; + *patternlen = len; +} + void add_exclude(const char *string, const char *base, int baselen, struct exclude_list *which) { struct exclude *x; - size_t len; - int to_exclude = 1; - int flags = 0; + int patternlen; + int flags; + int nowildcardlen; - if (*string == '!') { - to_exclude = 0; - string++; - } - len = strlen(string); - if (len && string[len - 1] == '/') { + parse_exclude_pattern(&string, &patternlen, &flags, &nowildcardlen); + if (flags & EXC_FLAG_MUSTBEDIR) { char *s; - x = xmalloc(sizeof(*x) + len); + x = xmalloc(sizeof(*x) + patternlen + 1); s = (char *)(x+1); - memcpy(s, string, len - 1); - s[len - 1] = '\0'; - string = s; + memcpy(s, string, patternlen); + s[patternlen] = '\0'; x->pattern = s; - flags = EXC_FLAG_MUSTBEDIR; } else { x = xmalloc(sizeof(*x)); x->pattern = string; } - x->to_exclude = to_exclude; - x->patternlen = strlen(string); + x->patternlen = patternlen; + x->nowildcardlen = nowildcardlen; x->base = base; x->baselen = baselen; x->flags = flags; - if (!strchr(string, '/')) - x->flags |= EXC_FLAG_NODIR; - x->nowildcardlen = simple_length(string); - if (*string == '*' && no_wildcard(string+1)) - x->flags |= EXC_FLAG_ENDSWITH; ALLOC_GROW(which->excludes, which->nr + 1, which->alloc); which->excludes[which->nr++] = x; } @@ -505,6 +532,72 @@ static void prep_exclude(struct dir_struct *dir, const char *base, int baselen) dir->basebuf[baselen] = '\0'; } +int match_basename(const char *basename, int basenamelen, + const char *pattern, int prefix, int patternlen, + int flags) +{ + if (prefix == patternlen) { + if (!strcmp_icase(pattern, basename)) + return 1; + } else if (flags & EXC_FLAG_ENDSWITH) { + if (patternlen - 1 <= basenamelen && + !strcmp_icase(pattern + 1, + basename + basenamelen - patternlen + 1)) + return 1; + } else { + if (fnmatch_icase(pattern, basename, 0) == 0) + return 1; + } + return 0; +} + +int match_pathname(const char *pathname, int pathlen, + const char *base, int baselen, + const char *pattern, int prefix, int patternlen, + int flags) +{ + const char *name; + int namelen; + + /* + * match with FNM_PATHNAME; the pattern has base implicitly + * in front of it. + */ + if (*pattern == '/') { + pattern++; + prefix--; + } + + /* + * baselen does not count the trailing slash. base[] may or + * may not end with a trailing slash though. + */ + if (pathlen < baselen + 1 || + (baselen && pathname[baselen] != '/') || + strncmp_icase(pathname, base, baselen)) + return 0; + + namelen = baselen ? pathlen - baselen - 1 : pathlen; + name = pathname + pathlen - namelen; + + if (prefix) { + /* + * if the non-wildcard part is longer than the + * remaining pathname, surely it cannot match. + */ + if (prefix > namelen) + return 0; + + if (strncmp_icase(pattern, name, prefix)) + return 0; + pattern += prefix; + name += prefix; + namelen -= prefix; + } + + return fnmatch_icase(pattern, name, FNM_PATHNAME) == 0; +} + /* Scan the list and let the last match determine the fate. * Return 1 for exclude, 0 for include and -1 for undecided. */ @@ -519,9 +612,9 @@ int excluded_from_list(const char *pathname, for (i = el->nr - 1; 0 <= i; i--) { struct exclude *x = el->excludes[i]; - const char *name, *exclude = x->pattern; - int to_exclude = x->to_exclude; - int namelen, prefix = x->nowildcardlen; + const char *exclude = x->pattern; + int to_exclude = x->flags & EXC_FLAG_NEGATIVE ? 0 : 1; + int prefix = x->nowildcardlen; if (x->flags & EXC_FLAG_MUSTBEDIR) { if (*dtype == DT_UNKNOWN) @@ -531,51 +624,18 @@ int excluded_from_list(const char *pathname, } if (x->flags & EXC_FLAG_NODIR) { - /* match basename */ - if (prefix == x->patternlen) { - if (!strcmp_icase(exclude, basename)) - return to_exclude; - } else if (x->flags & EXC_FLAG_ENDSWITH) { - if (x->patternlen - 1 <= pathlen && - !strcmp_icase(exclude + 1, pathname + pathlen - x->patternlen + 1)) - return to_exclude; - } else { - if (fnmatch_icase(exclude, basename, 0) == 0) - return to_exclude; - } - continue; - } - - /* match with FNM_PATHNAME: - * exclude has base (baselen long) implicitly in front of it. - */ - if (*exclude == '/') { - exclude++; - prefix--; - } - - if (pathlen < x->baselen || - (x->baselen && pathname[x->baselen-1] != '/') || - strncmp_icase(pathname, x->base, x->baselen)) + if (match_basename(basename, + pathlen - (basename - pathname), + exclude, prefix, x->patternlen, + x->flags)) + return to_exclude; continue; - - namelen = x->baselen ? pathlen - x->baselen : pathlen; - name = pathname + pathlen - namelen; - - /* if the non-wildcard part is longer than the - remaining pathname, surely it cannot match */ - if (prefix > namelen) - continue; - - if (prefix) { - if (strncmp_icase(exclude, name, prefix)) - continue; - exclude += prefix; - name += prefix; - namelen -= prefix; } - if (!namelen || !fnmatch_icase(exclude, name, FNM_PATHNAME)) + assert(x->baselen == 0 || x->base[x->baselen - 1] == '/'); + if (match_pathname(pathname, pathlen, + x->base, x->baselen ? x->baselen - 1 : 0, + exclude, prefix, x->patternlen, x->flags)) return to_exclude; } return -1; /* undecided */ |