static inline int unserialize_allowed_class(zend_string *class_name, HashTable *classes) { zend_string *lcname; int res; ALLOCA_FLAG(use_heap) if(classes == NULL) { return 1; } if(!zend_hash_num_elements(classes)) { return 0; } ZSTR_ALLOCA_ALLOC(lcname, ZSTR_LEN(class_name), use_heap); zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(class_name), ZSTR_LEN(class_name)); res = zend_hash_exists(classes, lcname); ZSTR_ALLOCA_FREE(lcname, use_heap); return res; }
static zend_string *browscap_intern_str_ci( browscap_parser_ctx *ctx, zend_string *str, zend_bool persistent) { zend_string *lcname; zend_string *interned; ALLOCA_FLAG(use_heap); ZSTR_ALLOCA_ALLOC(lcname, ZSTR_LEN(str), use_heap); zend_str_tolower_copy(ZSTR_VAL(lcname), ZSTR_VAL(str), ZSTR_LEN(str)); interned = zend_hash_find_ptr(&ctx->str_interned, lcname); if (interned) { zend_string_addref(interned); } else { interned = zend_string_dup(lcname, persistent); zend_hash_add_new_ptr(&ctx->str_interned, interned, interned); } ZSTR_ALLOCA_FREE(lcname, use_heap); return interned; }
static int browser_reg_compare( zval *entry_zv, int num_args, va_list args, zend_hash_key *key) /* {{{ */ { browscap_entry *entry = Z_PTR_P(entry_zv); zend_string *agent_name = va_arg(args, zend_string *); browscap_entry **found_entry_ptr = va_arg(args, browscap_entry **); browscap_entry *found_entry = *found_entry_ptr; ALLOCA_FLAG(use_heap); zend_string *pattern_lc, *regex; const char *cur; int i; pcre *re; int re_options; pcre_extra *re_extra; /* Agent name too short */ if (ZSTR_LEN(agent_name) < browscap_get_minimum_length(entry)) { return 0; } /* Quickly discard patterns where the prefix doesn't match. */ if (zend_binary_strcasecmp( ZSTR_VAL(agent_name), entry->prefix_len, ZSTR_VAL(entry->pattern), entry->prefix_len) != 0) { return 0; } /* Lowercase the pattern, the agent name is already lowercase */ ZSTR_ALLOCA_ALLOC(pattern_lc, ZSTR_LEN(entry->pattern), use_heap); zend_str_tolower_copy(ZSTR_VAL(pattern_lc), ZSTR_VAL(entry->pattern), ZSTR_LEN(entry->pattern)); /* Check if the agent contains the "contains" portions */ cur = ZSTR_VAL(agent_name) + entry->prefix_len; for (i = 0; i < BROWSCAP_NUM_CONTAINS; i++) { if (entry->contains_len[i] != 0) { cur = zend_memnstr(cur, ZSTR_VAL(pattern_lc) + entry->contains_start[i], entry->contains_len[i], ZSTR_VAL(agent_name) + ZSTR_LEN(agent_name)); if (!cur) { ZSTR_ALLOCA_FREE(pattern_lc, use_heap); return 0; } cur += entry->contains_len[i]; } } /* See if we have an exact match, if so, we're done... */ if (zend_string_equals(agent_name, pattern_lc)) { *found_entry_ptr = entry; ZSTR_ALLOCA_FREE(pattern_lc, use_heap); return ZEND_HASH_APPLY_STOP; } regex = browscap_convert_pattern(entry->pattern, 0); re = pcre_get_compiled_regex(regex, &re_extra, &re_options); if (re == NULL) { ZSTR_ALLOCA_FREE(pattern_lc, use_heap); zend_string_release(regex); return 0; } if (pcre_exec(re, re_extra, ZSTR_VAL(agent_name), ZSTR_LEN(agent_name), 0, re_options, NULL, 0) == 0) { /* If we've found a possible browser, we need to do a comparison of the number of characters changed in the user agent being checked versus the previous match found and the current match. */ if (found_entry) { size_t i, prev_len = 0, curr_len = 0; zend_string *previous_match = found_entry->pattern; zend_string *current_match = entry->pattern; for (i = 0; i < ZSTR_LEN(previous_match); i++) { switch (ZSTR_VAL(previous_match)[i]) { case '?': case '*': /* do nothing, ignore these characters in the count */ break; default: ++prev_len; } } for (i = 0; i < ZSTR_LEN(current_match); i++) { switch (ZSTR_VAL(current_match)[i]) { case '?': case '*': /* do nothing, ignore these characters in the count */ break; default: ++curr_len; } } /* Pick which browser pattern replaces the least amount of characters when compared to the original user agent string... */ if (prev_len < curr_len) { *found_entry_ptr = entry; } } else { *found_entry_ptr = entry; } } ZSTR_ALLOCA_FREE(pattern_lc, use_heap); zend_string_release(regex); return 0; }