From a3bf8b72faa5fce99f0f6384d6d9b6588a1de072 Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sat, 12 Jan 2008 12:14:14 +0000
Subject: [PATCH] Fix c_unescape

---
 source/utils.cpp | 19 +++++++++++--------
 1 file changed, 11 insertions(+), 8 deletions(-)

diff --git a/source/utils.cpp b/source/utils.cpp
index 0318e99..2232527 100644
--- a/source/utils.cpp
+++ b/source/utils.cpp
@@ -162,7 +162,7 @@ string c_unescape(const std::string &str)
 	string result;
 	for(string::const_iterator i=str.begin(); i!=str.end(); ++i)
 	{
-		if(numeric_type==1)
+		if(numeric_type==16)
 		{
 			unsigned digit=0;
 			if(*i>='0' && *i<='9')
@@ -182,7 +182,7 @@ string c_unescape(const std::string &str)
 				numeric_type=0;
 			}
 		}
-		else if(numeric_type==2)
+		else if(numeric_type==8)
 		{
 			unsigned digit=0;
 			if(*i>='0' && *i<='7')
@@ -190,12 +190,9 @@ string c_unescape(const std::string &str)
 			else
 				throw InvalidParameterValue("Invalid octal digit");
 
-			if(numeric_pos==0 && digit>3)
-				throw InvalidParameterValue("Octal escape sequence must start with [0-3]");
-
 			numeric_value=(numeric_value<<3 | digit);
 			++numeric_pos;
-			if(numeric_pos==2)
+			if(numeric_pos==3)
 			{
 				result+=numeric_value;
 				numeric_type=0;
@@ -203,12 +200,18 @@ string c_unescape(const std::string &str)
 		}
 		else if(escape)
 		{
-			if(*i=='x' || (*i>='0' && *i<='7'))
+			if(*i=='x')
 			{
-				numeric_type=(*i=='x' ? 1 : 2);
+				numeric_type=16;
 				numeric_pos=0;
 				numeric_value=0;
 			}
+			else if(*i>='0' && *i<='3')
+			{
+				numeric_type=8;
+				numeric_pos=1;
+				numeric_value=*i-'0';
+			}
 			else if(*i=='n')
 				result+='\n';
 			else if(*i=='t')
-- 
2.43.0