From c75090cdf28e126410f7260a60ee19e268925dbc Mon Sep 17 00:00:00 2001
From: Jan Vidar Krey <janvidar@extatic.org>
Date: Thu, 29 Jul 2010 08:42:40 +0200
Subject: [PATCH] Added a generic string to boolean parser.

---
 src/util/misc.c | 35 +++++++++++++++++++++++++++++++++++
 src/util/misc.h |  8 ++++++++
 2 files changed, 43 insertions(+)

diff --git a/src/util/misc.c b/src/util/misc.c
index c9ed932..c670638 100644
--- a/src/util/misc.c
+++ b/src/util/misc.c
@@ -448,3 +448,38 @@ void strip_off_ini_line_comments(char* line, int line_count)
 	}
 	*out = '\0';
 }
+
+int string_to_boolean(const char* str, int* boolean)
+{
+	if (!str || !*str || !boolean)
+		return 0;
+
+	switch (strlen(str))
+	{
+		case 1:
+			if      (str[0] == '1') { *boolean = 1; return 1; }
+			else if (str[0] == '0') { *boolean = 0; return 1; }
+			return 0;
+
+		case 2:
+			if (!strcasecmp(str, "on")) { *boolean = 1; return 1; }
+			if (!strcasecmp(str, "no")) { *boolean = 0; return 1; }
+			return 0;
+
+		case 3:
+			if (!strcasecmp(str, "yes")) { *boolean = 1; return 1; }
+			if (!strcasecmp(str, "off")) { *boolean = 0; return 1; }
+			return 0;
+
+		case 4:
+			if (!strcasecmp(str, "true")) { *boolean = 1; return 1; }
+			return 0;
+
+		case 5:
+			if (!strcasecmp(str, "false")) { *boolean = 0; return 1; }
+			return 0;
+
+		default:
+			return 0;
+	}
+}
diff --git a/src/util/misc.h b/src/util/misc.h
index 43f8d10..048ee56 100644
--- a/src/util/misc.h
+++ b/src/util/misc.h
@@ -37,6 +37,14 @@ extern void strip_off_ini_line_comments(char* line, int line_count);
 
 extern int file_read_lines(const char* file, void* data, file_line_handler_t handler);
 
+/**
+ * Convert a string to a boolean (0 or 1).
+ * Example:
+ * "yes", "true", "1", "on" sets 1 in boolean, and returns 1.
+ * "no", "false", "0", "off" sets 0 in boolean, and returns 1.
+ * All other values return 0, and boolean is unchanged.
+ */
+extern int string_to_boolean(const char* str, int* boolean);
 
 
 extern const char* uhub_itoa(int val);