+++ /dev/null
-/*
- parse.c : irssi configuration - parse configuration file
-
- Copyright (C) 1999 Timo Sirainen
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include "module.h"
-
-static int g_istr_equal(gconstpointer v, gconstpointer v2)
-{
- return g_strcasecmp((const char *) v, (const char *) v2) == 0;
-}
-
-/* a char* hash function from ASU */
-static unsigned int g_istr_hash(gconstpointer v)
-{
- const char *s = (const char *) v;
- unsigned int h = 0, g;
-
- while (*s != '\0') {
- h = (h << 4) + i_toupper(*s);
- if ((g = h & 0xf0000000UL)) {
- h = h ^ (g >> 24);
- h = h ^ g;
- }
- s++;
- }
-
- return h /* % M */;
-}
-
-int config_error(CONFIG_REC *rec, const char *msg)
-{
- g_free_and_null(rec->last_error);
- rec->last_error = g_strdup(msg);
- return -1;
-}
-
-static int node_add_comment(CONFIG_NODE *parent, const char *str)
-{
- CONFIG_NODE *node;
-
- g_return_val_if_fail(parent != NULL, -1);
-
- if (!is_node_list(parent))
- return -1;
-
- node = g_new0(CONFIG_NODE, 1);
- node->type = NODE_TYPE_COMMENT;
- node->value = str == NULL ? NULL : g_strdup(str);
-
- parent->value = g_slist_append(parent->value, node);
- return 0;
-}
-
-/* same as g_scanner_get_next_token() except skips and reads the comments */
-static void config_parse_get_token(GScanner *scanner, CONFIG_NODE *node)
-{
- int prev_empty = FALSE;
-
- for (;;) {
- g_scanner_get_next_token(scanner);
-
- if (scanner->token == G_TOKEN_COMMENT_SINGLE)
- node_add_comment(node, scanner->value.v_string);
- else if (scanner->token == '\n') {
- if (prev_empty) node_add_comment(node, NULL);
- } else {
- if (scanner->token == G_TOKEN_INT) {
- scanner->token = G_TOKEN_STRING;
- scanner->value.v_string = g_strdup_printf("%lu", scanner->value.v_int);
- }
- break;
- }
-
- prev_empty = TRUE;
- }
-}
-
-/* same as g_scanner_peek_next_token() except skips and reads the comments */
-static void config_parse_peek_token(GScanner *scanner, CONFIG_NODE *node)
-{
- int prev_empty = FALSE;
-
- for (;;) {
- g_scanner_peek_next_token(scanner);
-
- if (scanner->next_token == G_TOKEN_COMMENT_SINGLE)
- node_add_comment(node, scanner->next_value.v_string);
- else if (scanner->next_token == '\n') {
- if (prev_empty) node_add_comment(node, NULL);
- } else
- break;
-
- prev_empty = TRUE;
- g_scanner_get_next_token(scanner);
- }
-}
-
-/* get optional token, optionally warn if it's missing */
-static void config_parse_warn_missing(CONFIG_REC *rec, CONFIG_NODE *node,
- GTokenType expected_token, int print_warning)
-{
- config_parse_peek_token(rec->scanner, node);
- if (rec->scanner->next_token == expected_token) {
- g_scanner_get_next_token(rec->scanner);
- return;
- }
-
- if (print_warning)
- g_scanner_warn(rec->scanner, "Warning: missing '%c'", expected_token);
-}
-
-static void config_parse_loop(CONFIG_REC *rec, CONFIG_NODE *node, GTokenType expect);
-
-static GTokenType config_parse_symbol(CONFIG_REC *rec, CONFIG_NODE *node)
-{
- CONFIG_NODE *newnode;
- GTokenType last_char;
- int print_warning;
- char *key;
-
- g_return_val_if_fail(rec != NULL, G_TOKEN_ERROR);
- g_return_val_if_fail(node != NULL, G_TOKEN_ERROR);
-
- config_parse_get_token(rec->scanner, node);
-
- last_char = (GTokenType) (node->type == NODE_TYPE_LIST ? ',' : ';');
-
- /* key */
- key = NULL;
- if (node->type != NODE_TYPE_LIST &&
- (rec->scanner->token == G_TOKEN_STRING)) {
- key = g_strdup(rec->scanner->value.v_string);
-
- config_parse_warn_missing(rec, node, '=', TRUE);
- config_parse_get_token(rec->scanner, node);
- }
-
- switch (rec->scanner->token) {
- case G_TOKEN_STRING:
- /* value */
- config_node_set_str(rec, node, key, rec->scanner->value.v_string);
- g_free_not_null(key);
-
- print_warning = TRUE;
- if (node->type == NODE_TYPE_LIST) {
- /* if it's last item it doesn't need comma */
- config_parse_peek_token(rec->scanner, node);
- if (rec->scanner->next_token == ')')
- print_warning = FALSE;
- }
-
- config_parse_warn_missing(rec, node, last_char, print_warning);
- break;
-
- case '{':
- /* block */
- if (key == NULL && node->type != NODE_TYPE_LIST)
- return G_TOKEN_ERROR;
-
- newnode = config_node_section(node, key, NODE_TYPE_BLOCK);
- config_parse_loop(rec, newnode, (GTokenType) '}');
- g_free_not_null(key);
-
- config_parse_get_token(rec->scanner, node);
- if (rec->scanner->token != '}')
- return (GTokenType) '}';
-
- config_parse_warn_missing(rec, node, last_char, FALSE);
- break;
-
- case '(':
- /* list */
- if (key == NULL)
- return G_TOKEN_ERROR;
- newnode = config_node_section(node, key, NODE_TYPE_LIST);
- config_parse_loop(rec, newnode, (GTokenType) ')');
- g_free_not_null(key);
-
- config_parse_get_token(rec->scanner, node);
- if (rec->scanner->token != ')')
- return (GTokenType) ')';
-
- config_parse_warn_missing(rec, node, last_char, FALSE);
- break;
-
- default:
- /* error */
- g_free_not_null(key);
- return G_TOKEN_STRING;
- }
-
- return G_TOKEN_NONE;
-}
-
-static void config_parse_loop(CONFIG_REC *rec, CONFIG_NODE *node, GTokenType expect)
-{
- GTokenType expected_token;
-
- g_return_if_fail(rec != NULL);
- g_return_if_fail(node != NULL);
-
- for (;;) {
- config_parse_peek_token(rec->scanner, node);
- if (rec->scanner->next_token == expect ||
- rec->scanner->next_token == G_TOKEN_EOF) break;
-
- expected_token = config_parse_symbol(rec, node);
- if (expected_token != G_TOKEN_NONE) {
- if (expected_token == G_TOKEN_ERROR)
- expected_token = G_TOKEN_NONE;
- g_scanner_unexp_token(rec->scanner, expected_token, NULL, "symbol", NULL, NULL, TRUE);
- }
- }
-}
-
-static void config_parse_error_func(GScanner *scanner, char *message, int is_error)
-{
- CONFIG_REC *rec = scanner->user_data;
- char *old;
-
- old = rec->last_error;
- rec->last_error = g_strdup_printf("%s%s:%d: %s%s\n",
- old == NULL ? "" : old,
- scanner->input_name, scanner->line,
- is_error ? "error: " : "",
- message);
- g_free_not_null(old);
-}
-
-void config_parse_init(CONFIG_REC *rec, const char *name)
-{
- GScanner *scanner;
-
- g_free_and_null(rec->last_error);
- config_nodes_remove_all(rec);
-
- rec->scanner = scanner = g_scanner_new(NULL);
- scanner->config->skip_comment_single = FALSE;
- scanner->config->cset_identifier_first = G_CSET_a_2_z"_0123456789"G_CSET_A_2_Z;
- scanner->config->cset_skip_characters = " \t";
- scanner->config->scan_binary = FALSE;
- scanner->config->scan_octal = FALSE;
- scanner->config->scan_float = FALSE;
- scanner->config->scan_string_sq = TRUE;
- scanner->config->scan_string_dq = TRUE;
- scanner->config->scan_identifier_1char = TRUE;
- scanner->config->identifier_2_string = TRUE;
-
- scanner->user_data = rec;
- scanner->input_name = name;
- scanner->msg_handler = (GScannerMsgFunc) config_parse_error_func;
-}
-
-/* Parse configuration file */
-int config_parse(CONFIG_REC *rec)
-{
- g_return_val_if_fail(rec != NULL, -1);
- g_return_val_if_fail(rec->fname != NULL, -1);
-
- rec->handle = open(rec->fname, O_RDONLY);
- if (rec->handle == -1)
- return config_error(rec, g_strerror(errno));
-
- config_parse_init(rec, rec->fname);
- g_scanner_input_file(rec->scanner, rec->handle);
- config_parse_loop(rec, rec->mainnode, G_TOKEN_EOF);
- g_scanner_destroy(rec->scanner);
-
- close(rec->handle);
- rec->handle = -1;
-
- return rec->last_error == NULL ? 0 : -1;
-}
-
-/* Parse configuration found from `data'. `input_name' is specifies the
- "configuration name" which is displayed in error messages. */
-int config_parse_data(CONFIG_REC *rec, const char *data, const char *input_name)
-{
- config_parse_init(rec, input_name);
- g_scanner_input_text(rec->scanner, data, strlen(data));
- config_parse_loop(rec, rec->mainnode, G_TOKEN_EOF);
- g_scanner_destroy(rec->scanner);
-
- return rec->last_error == NULL ? 0 : -1;
-}
-
-/* Open configuration. The file is created if it doesn't exist, unless
- `create_mode' is -1. `fname' can be NULL if you just want to use
- config_parse_data() */
-CONFIG_REC *config_open(const char *fname, int create_mode)
-{
- CONFIG_REC *rec;
- int f;
-
- if (fname != NULL) {
- f = open(fname, O_RDONLY | (create_mode != -1 ? O_CREAT : 0), create_mode);
- if (f == -1) return NULL;
- close(f);
- }
-
- rec = g_new0(CONFIG_REC, 1);
- rec->fname = fname == NULL ? NULL : g_strdup(fname);
- rec->handle = -1;
- rec->create_mode = create_mode;
- rec->mainnode = g_new0(CONFIG_NODE, 1);
- rec->mainnode->type = NODE_TYPE_BLOCK;
- rec->cache = g_hash_table_new((GHashFunc) g_istr_hash, (GCompareFunc) g_istr_equal);
- rec->cache_nodes = g_hash_table_new((GHashFunc) g_direct_hash, (GCompareFunc) g_direct_equal);
-
- return rec;
-}
-
-/* Release all memory used by configuration */
-void config_close(CONFIG_REC *rec)
-{
- g_return_if_fail(rec != NULL);
-
- config_nodes_remove_all(rec);
- g_free(rec->mainnode);
-
- if (rec->handle != -1) close(rec->handle);
- g_hash_table_foreach(rec->cache, (GHFunc) g_free, NULL);
- g_hash_table_destroy(rec->cache);
- g_hash_table_destroy(rec->cache_nodes);
- g_free_not_null(rec->last_error);
- g_free_not_null(rec->fname);
- g_free(rec);
-}
-
-/* Change file name of config file */
-void config_change_file_name(CONFIG_REC *rec, const char *fname, int create_mode)
-{
- g_return_if_fail(rec != NULL);
- g_return_if_fail(fname != NULL);
-
- g_free_not_null(rec->fname);
- rec->fname = g_strdup(fname);
-
- if (create_mode != -1)
- rec->create_mode = create_mode;
-}
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