--- /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) + 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;
+#undef g_strdup_printf /* This is free'd by GLib itself */
+ scanner->value.v_string = g_strdup_printf("%lu", scanner->value.v_int);
+#ifdef MEM_DEBUG
+#define g_strdup_printf(a, b...) ig_strdup_printf(__FILE__, __LINE__, a, ##b)
+#endif
+ }
+ 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_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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