From 4b87549a645fd62107ddc5295a5027b2a5851096 Mon Sep 17 00:00:00 2001
From: Florian Jung <flo@thinkpad.(none)>
Date: Mon, 10 Jan 2011 17:32:36 +0100
Subject: Added str_before and str_after functions

str_before ("foo:bar:baz",':',"doesntmatter") returns "foo"
str_after  ("foo:bar:baz",':',"doesntmatter") returns "bar:baz"
str_after and str_before ("foobar",':',"default") returns "default"

Also, extract_var and extract_val now use the newly created functions
---
 synth/util.cpp | 22 ++++++++++++++++------
 synth/util.h   |  2 ++
 2 files changed, 18 insertions(+), 6 deletions(-)

diff --git a/synth/util.cpp b/synth/util.cpp
index 51e6fda..2862fdb 100644
--- a/synth/util.cpp
+++ b/synth/util.cpp
@@ -175,24 +175,34 @@ parameter_enum param_to_enum(string param)
 		return UNKNOWN;
 }
 
-string extract_var(string s)
+string str_before(string s, char delim, string onfail)
 {
 	size_t p;
-	p=s.find('=');
+	p=s.find(delim);
 	if (p!=string::npos)
 		return s.substr(0,p);
 	else
-		return "";
+		return onfail;
 }
 
-string extract_val(string s)
+string str_after(string s, char delim, string onfail)
 {
 	size_t p;
-	p=s.find('=');
+	p=s.find(delim);
 	if (p!=string::npos)
 		return s.substr(p+1);
 	else
-		return s;
+		return onfail;
+}
+
+string extract_var(string s)
+{
+	return str_before(s,'=',"");
+}
+
+string extract_val(string s)
+{
+	return str_after(s,'=',s);
 }
 
 string fileext(string f)
diff --git a/synth/util.h b/synth/util.h
index e571c7d..ad88954 100644
--- a/synth/util.h
+++ b/synth/util.h
@@ -28,4 +28,6 @@ string extract_val(string s);
 string fileext(string f);
 
 
+string str_before(string s, char delim, string onfail="");
+string str_after(string s, char delim, string onfail="");
 #endif
-- 
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