From f9e0275e476540c1b5d61c03a6a87d521856059b Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Wed, 24 Dec 2008 07:08:10 +0000
Subject: [PATCH] Add utility functions to check the contents of a string Fix
 str_to_bool

---
 source/lexicalcast.cpp |  6 +++++-
 source/utils.cpp       | 25 ++++++++++++++++++++++++-
 source/utils.h         | 24 +++++++++++++++++++++++-
 3 files changed, 52 insertions(+), 3 deletions(-)

diff --git a/source/lexicalcast.cpp b/source/lexicalcast.cpp
index 687a37b..cdd5578 100644
--- a/source/lexicalcast.cpp
+++ b/source/lexicalcast.cpp
@@ -211,10 +211,14 @@ string bool_to_str(bool b, const Fmt &f)
 
 bool str_to_bool(const string &s)
 {
+	if(s.empty())
+		throw LexicalError("Empty input in boolean conversion");
+
 	if(s=="1" || s=="true" || s=="yes" || s=="on")
 		return true;
 	else if(s=="0" || s=="false" || s=="no" || s=="off")
-		return true;
+		return false;
+
 	throw LexicalError("Invalid input in boolean conversion");
 }
 
diff --git a/source/utils.cpp b/source/utils.cpp
index d67cc7e..baf1333 100644
--- a/source/utils.cpp
+++ b/source/utils.cpp
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspstrings
-Copyright © 2006-2007 Mikko Rasa
+Copyright © 2006-2008 Mikko Rasa
 Distributed under the LGPL
 */
 
@@ -46,6 +46,14 @@ vector<string> do_split(const string &str, const string &sep, int max_split)
 	return result;
 }
 
+bool check_str(const std::string &str, int (*pred)(int))
+{
+	for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
+		if(!pred(*i))
+			return false;
+	return true;
+}
+
 }
 
 namespace Msp {
@@ -79,6 +87,21 @@ string toupper(const string &str)
 	return result;
 }
 
+bool isnumrc(const string &str)
+{
+	return check_str(str, isdigit);
+}
+
+bool isalpha(const string &str)
+{
+	return check_str(str, isalpha);
+}
+
+bool isalnum(const string &str)
+{
+	return check_str(str, isalnum);
+}
+
 vector<string> split(const string &str, const string &sep, int max_split)
 {
 	return do_split<false, false>(str, sep, max_split);
diff --git a/source/utils.h b/source/utils.h
index 5492f95..44c2edb 100644
--- a/source/utils.h
+++ b/source/utils.h
@@ -1,7 +1,7 @@
 /* $Id$
 
 This file is part of libmspstrings
-Copyright © 2006-2007 Mikko Rasa
+Copyright © 2006-2008 Mikko Rasa
 Distributed under the LGPL
 */
 
@@ -33,6 +33,28 @@ Converts a string to upper case.
 */
 std::string toupper(const std::string &);
 
+/**
+Checks whether a string consists of digits only.
+*/
+bool isnumrc(const std::string &);
+
+/**
+Checks whether a string consists of alphabetic characters only.
+*/
+bool isalpha(const std::string &);
+
+/**
+Checks whether a string consists of alphanumeric characters only.
+*/
+bool isalnum(const std::string &);
+
+/* These are required to make the standard version work from inside the Msp
+namespace */
+using std::tolower;
+using std::toupper;
+using std::isalpha;
+using std::isalnum;
+
 /**
 Splits a string at occurrences of any of the characters in sep.  If max_split
 is non-negative, at most that many split will be performed, i.e. the resulting
-- 
2.43.0