msgfile: Add a file parser for a simple file format

This file format will be used to store per country code,
per network code messages. This will be used for various
things ranging from access control, to messages...

1 files changed, 118 insertions, 0 deletions

diff --git a/src/msgfile.c b/src/msgfile.c
new file mode 100644
index 00000000..051f5b75
--- /dev/null
+++ b/src/msgfile.c
@@ -0,0 +1,118 @@
+/*
+ * Parse a simple file with messages, e.g used for USSD messages
+ *
+ * (C) 2010 by Holger Hans Peter Freyther
+ * (C) 2010 by On-Waves
+ * All Rights Reserved
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ */
+
+#include <osmocore/msgfile.h>
+#include <osmocore/talloc.h>
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <string.h>
+
+static struct msg_entry *alloc_entry(struct msg_entries *entries,
+				     const char *mcc, const char *mnc,
+				     const char *option, const char *text)
+{
+	struct msg_entry *entry = talloc_zero(entries, struct msg_entry);
+	if (!entry)
+		return NULL;
+
+	entry->mcc = talloc_strdup(entry, mcc);
+	entry->mnc = talloc_strdup(entry, mnc);
+	entry->option = talloc_strdup(entry, option);
+	entry->text = talloc_strdup(entry, text);
+
+	llist_add_tail(&entry->list, &entries->entry);
+	return entry;
+}
+
+static struct msg_entries *alloc_entries(void *ctx)
+{
+	struct msg_entries *entries;
+
+	entries = talloc_zero(ctx, struct msg_entries);
+	if (!entries)
+		return NULL;
+
+	INIT_LLIST_HEAD(&entries->entry);
+	return entries;
+}
+
+/*
+ * split a line like 'foo:Text'.
+ */
+static void handle_line(struct msg_entries *entries, char *line)
+{
+	int i;
+	const int len = strlen(line);
+
+	char *items[3];
+	int last_item = 0;
+
+	for (i = 0; i < len; ++i) {
+		if (line[i] == '\n' || line[i] == '\r')
+			line[i] = '\0';
+		else if (line[i] == ':' && last_item < 3) {
+			line[i] = '\0';
+
+			items[last_item++] = &line[i + 1];
+		}
+	}
+
+	if (last_item == 3) {
+		alloc_entry(entries, &line[0] , items[0], items[1], items[2]);
+		return;
+	}
+
+	/* nothing found */
+}
+
+struct msg_entries *msg_entry_parse(void *ctx, const char *filename)
+{
+	struct msg_entries *entries;
+	size_t n;
+	char *line;
+	FILE *file;
+
+	file = fopen(filename, "r");
+	if (!file)
+		return NULL;
+
+	entries = alloc_entries(ctx);
+	if (!entries) {
+		fclose(file);
+		return NULL;
+	}
+
+	n = 2342;
+	line = NULL;
+        while (getline(&line, &n, file) != -1) {
+		handle_line(entries, line);
+		free(line);
+		line = NULL;
+	}
+
+	fclose(file);
+	return entries;
+}