X-Git-Url: http://git.silcnet.org/gitweb/?a=blobdiff_plain;f=apps%2Firssi%2Fsrc%2Flib-config%2Fparse.c;fp=apps%2Firssi%2Fsrc%2Flib-config%2Fparse.c;h=883a920b68443760472583c1574403ad32ac86e1;hb=23c5df1c8b0bfe539d3fa65802186e6e09e044aa;hp=0000000000000000000000000000000000000000;hpb=0f9738ce962b8498bbed0a75d5fb6fa127e3577f;p=silc.git

diff --git a/apps/irssi/src/lib-config/parse.c b/apps/irssi/src/lib-config/parse.c
new file mode 100644
index 00000000..883a920b
--- /dev/null
+++ b/apps/irssi/src/lib-config/parse.c
@@ -0,0 +1,360 @@
+/*
+ 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;
+}