1

public/tier1/tokenreader.h

@@ -0,0 +1,99 @@
+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef TOKENREADER_H
+#define TOKENREADER_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+#include "tier0/basetypes.h"
+
+#ifdef _WIN32
+#pragma warning(push, 1)
+#pragma warning(disable:4701 4702 4530)
+#endif
+
+#undef min
+#undef max
+#include <fstream>
+#include "valve_minmax_on.h"
+
+#ifdef _WIN32
+#pragma warning(pop)
+#endif
+
+#include <assert.h>
+
+
+typedef enum
+{
+	TOKENSTRINGTOOLONG = -4,
+	TOKENERROR = -3,
+	TOKENNONE = -2,
+	TOKENEOF = -1,
+	OPERATOR,
+	INTEGER,
+	STRING,
+	IDENT
+} trtoken_t;
+
+
+#define IsToken(s1, s2)	!strcmpi(s1, s2)
+
+#define MAX_TOKEN 128 + 1
+#define MAX_IDENT 64 + 1
+#define MAX_STRING 128 + 1
+
+
+class TokenReader : private std::ifstream
+{
+public:
+
+	TokenReader();
+
+	bool Open(const char *pszFilename);
+	trtoken_t NextToken(char *pszStore, int nSize);
+	trtoken_t NextTokenDynamic(char **ppszStore);
+	void Close();
+
+	void IgnoreTill(trtoken_t ttype, const char *pszToken);
+	void Stuff(trtoken_t ttype, const char *pszToken);
+	bool Expecting(trtoken_t ttype, const char *pszToken);
+	const char *Error(char *error, ...);
+	trtoken_t PeekTokenType(char* = NULL, int maxlen = 0);
+
+	inline int GetErrorCount(void);
+
+private:
+	// compiler can't generate an assignment operator since descended from std::ifstream
+	inline TokenReader(TokenReader const &);
+	inline int operator=(TokenReader const &);
+
+	trtoken_t GetString(char *pszStore, int nSize);
+	bool SkipWhiteSpace(void);
+
+	int m_nLine;
+	int m_nErrorCount;
+
+	char m_szFilename[128];
+	char m_szStuffed[128];
+	bool m_bStuffed;
+	trtoken_t m_eStuffed;
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Returns the total number of parsing errors since this file was opened.
+//-----------------------------------------------------------------------------
+int TokenReader::GetErrorCount(void)
+{
+	return(m_nErrorCount);
+}
+
+
+#endif // TOKENREADER_H