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gcsdk/stackstring.h

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+// A string class that keeps all its memory on the stack and performs no
+// memory allocation
+//=============================================================================//
+
+#ifndef STACKSTRING_H
+#define STACKSTRING_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+template< size_t cubSize >
+class CStackString
+{
+public:
+	class CStackString() { Reset(); }
+	class CStackString( const char *pchRHS ) { Set( pchRHS ); }
+
+	void Reset() { m_rchBuffer[0] = 0; m_pchEnd = m_rchBuffer; }
+	void Set( const char *pchValue );
+	const char *Get() const { return m_rchBuffer; }
+	static size_t GetCubSize() { return cubSize; }
+	size_t Length() const { return m_pchEnd - &m_rchBuffer[0]; }
+
+	CStackString & operator=( const char *pchValue ) { Set( pchValue ); return *this; }
+	CStackString & operator+=( const char *pchValue ) { Append( pchValue ); return *this; }
+	operator const char*() const { return m_rchBuffer; }
+
+	void Format( PRINTF_FORMAT_STRING const char *pchFormat, ... );
+	void AppendFormat( PRINTF_FORMAT_STRING const char *pchFormat, ... );
+	void AppendFormatV( const char *pchFormat, va_list marker );
+	void Append( const char *pchValue );
+
+	void SetIndent( uint32 unCount, char chIndent = '\t' );
+private:
+	char m_rchBuffer[ cubSize ];
+	char *m_pchEnd;
+};
+
+typedef CStackString<256> CStackString256;
+typedef CStackString<512> CStackString512;
+typedef CStackString<1024> CStackString1024;
+typedef CStackString<8192> CStackStringMax;
+
+template< size_t cubSize >
+void CStackString<cubSize>::Set( const char *pchValue ) 
+{ 
+	V_strcpy_safe( m_rchBuffer, pchValue ); 
+	m_pchEnd = &m_rchBuffer[Q_strlen(m_rchBuffer)]; 
+}
+
+template< size_t cubSize >
+void CStackString<cubSize>::AppendFormatV( const char *pchFormat, va_list marker )
+{
+	size_t cubPrinted = Q_vsnprintf( m_pchEnd, GetCubSize() - Length(), pchFormat, marker );
+	m_pchEnd += cubPrinted;
+}
+
+
+template< size_t cubSize >
+void CStackString<cubSize>::Format( PRINTF_FORMAT_STRING const char *pchFormat, ... )
+{
+	va_list marker;
+	va_start( marker, pchFormat );
+	size_t cubPrinted = Q_vsnprintf( m_rchBuffer, GetCubSize(), pchFormat, marker );
+	m_pchEnd = m_rchBuffer + cubPrinted;
+	va_end( marker );
+}
+
+
+template< size_t cubSize >
+void CStackString<cubSize>::AppendFormat( PRINTF_FORMAT_STRING const char *pchFormat, ... )
+{
+	va_list marker;
+	va_start( marker, pchFormat );
+	AppendFormatV( pchFormat, marker );
+	va_end( marker );
+}
+
+template< size_t cubSize >
+void CStackString<cubSize>::Append( const char *pchValue )
+{
+	Q_strcat( m_rchBuffer, pchValue, GetCubSize() );
+	m_pchEnd = m_rchBuffer + Q_strlen(m_rchBuffer);
+}
+
+template< size_t cubSize >
+void CStackString<cubSize>::SetIndent( uint32 unCount, char chIndent )
+{
+	Reset();
+	for ( uint32 x = 0; x < unCount && x < (GetCubSize()-1); x++ )
+	{
+		*m_pchEnd = chIndent;
+		m_pchEnd++;
+	}
+	*m_pchEnd = '\0';
+}
+
+
+#endif