From 6bcf419d2e8f739b432d4790d1ba9d48ab65365b Mon Sep 17 00:00:00 2001
From: fcolin
Date: Fri, 18 Nov 2011 12:14:12 +0000
Subject: 

---
 ARMFCaptureD3D/ConfigFile/ConfigFile.cpp | 142 +++++++++++++++++++++++++++++++
 1 file changed, 142 insertions(+)
 create mode 100644 ARMFCaptureD3D/ConfigFile/ConfigFile.cpp

(limited to 'ARMFCaptureD3D/ConfigFile/ConfigFile.cpp')

diff --git a/ARMFCaptureD3D/ConfigFile/ConfigFile.cpp b/ARMFCaptureD3D/ConfigFile/ConfigFile.cpp
new file mode 100644
index 0000000..f041064
--- /dev/null
+++ b/ARMFCaptureD3D/ConfigFile/ConfigFile.cpp
@@ -0,0 +1,142 @@
+// ConfigFile.cpp
+
+#include "ConfigFile.h"
+
+using std::string;
+
+ConfigFile::ConfigFile( string filename, string delimiter,
+                        string comment, string sentry )
+	: myDelimiter(delimiter), myComment(comment), mySentry(sentry)
+{
+	// Construct a ConfigFile, getting keys and values from given file
+	
+	std::ifstream in( filename.c_str() );
+	
+	if( !in ) throw file_not_found( filename ); 
+	
+	in >> (*this);
+}
+
+
+ConfigFile::ConfigFile()
+	: myDelimiter( string(1,'=') ), myComment( string(1,'#') )
+{
+	// Construct a ConfigFile without a file; empty
+}
+
+
+void ConfigFile::remove( const string& key )
+{
+	// Remove key and its value
+	myContents.erase( myContents.find( key ) );
+	return;
+}
+
+
+bool ConfigFile::keyExists( const string& key ) const
+{
+	// Indicate whether key is found
+	mapci p = myContents.find( key );
+	return ( p != myContents.end() );
+}
+
+
+/* static */
+void ConfigFile::trim( string& s )
+{
+	// Remove leading and trailing whitespace
+	static const char whitespace[] = " \n\t\v\r\f";
+	s.erase( 0, s.find_first_not_of(whitespace) );
+	s.erase( s.find_last_not_of(whitespace) + 1U );
+}
+
+
+std::ostream& operator<<( std::ostream& os, const ConfigFile& cf )
+{
+	// Save a ConfigFile to os
+	for( ConfigFile::mapci p = cf.myContents.begin();
+	     p != cf.myContents.end();
+		 ++p )
+	{
+		os << p->first << " " << cf.myDelimiter << " ";
+		os << p->second << std::endl;
+	}
+	return os;
+}
+
+
+std::istream& operator>>( std::istream& is, ConfigFile& cf )
+{
+	// Load a ConfigFile from is
+	// Read in keys and values, keeping internal whitespace
+	typedef string::size_type pos;
+	const string& delim  = cf.myDelimiter;  // separator
+	const string& comm   = cf.myComment;    // comment
+	const string& sentry = cf.mySentry;     // end of file sentry
+	const pos skip = delim.length();        // length of separator
+	
+	string nextline = "";  // might need to read ahead to see where value ends
+	
+	while( is || nextline.length() > 0 )
+	{
+		// Read an entire line at a time
+		string line;
+		if( nextline.length() > 0 )
+		{
+			line = nextline;  // we read ahead; use it now
+			nextline = "";
+		}
+		else
+		{
+			std::getline( is, line );
+		}
+		
+		// Ignore comments
+		line = line.substr( 0, line.find(comm) );
+		
+		// Check for end of file sentry
+		if( sentry != "" && line.find(sentry) != string::npos ) return is;
+		
+		// Parse the line if it contains a delimiter
+		pos delimPos = line.find( delim );
+		if( delimPos < string::npos )
+		{
+			// Extract the key
+			string key = line.substr( 0, delimPos );
+			line.replace( 0, delimPos+skip, "" );
+			
+			// See if value continues on the next line
+			// Stop at blank line, next line with a key, end of stream,
+			// or end of file sentry
+			bool terminate = false;
+			while( !terminate && is )
+			{
+				std::getline( is, nextline );
+				terminate = true;
+				
+				string nlcopy = nextline;
+				ConfigFile::trim(nlcopy);
+				if( nlcopy == "" ) continue;
+				
+				nextline = nextline.substr( 0, nextline.find(comm) );
+				if( nextline.find(delim) != string::npos )
+					continue;
+				if( sentry != "" && nextline.find(sentry) != string::npos )
+					continue;
+				
+				nlcopy = nextline;
+				ConfigFile::trim(nlcopy);
+				if( nlcopy != "" ) line += "\n";
+				line += nextline;
+				terminate = false;
+			}
+			
+			// Store key and value
+			ConfigFile::trim(key);
+			ConfigFile::trim(line);
+			cf.myContents[key] = line;  // overwrites if key is repeated
+		}
+	}
+	
+	return is;
+}
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