Initial import.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@3 6f19259b-4bc3-4df7-8a09-765794883524

Tools/Source/TianoTools/Pccts/h/BufFileInput.h

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+// FILE:        BufFileInput.h
+// AUTHOR:      Alexey Demakov (AVD) demakov@kazbek.ispras.ru
+// CREATION:    26-JAN-1998
+// DESCRIPTION: File Input Stream with lookahead for Scanner
+// Tested under Win32 with ANTLR 1.33 MR10 and MSVC 5.0
+
+// Change History:
+//
+//   28-May-1998    Add virtual destructor to release buffer
+//                  Manfred Kogler (km@cast.uni-linz.ac.at)
+//                  (1.33MR14)
+
+#ifndef BufFileInput_h
+#define BufFileInput_h
+
+#include "pcctscfg.h"
+
+#include "pccts_stdio.h"
+
+PCCTS_NAMESPACE_STD
+
+#include "DLexerBase.h"
+
+class DllExportPCCTS BufFileInput : public DLGInputStream
+{
+public:
+    // constructor
+    // f - input stream
+    // buf_size - size of buffer (maximal length for string in is_in)
+
+    BufFileInput(FILE *f, int buf_size = 8 );
+
+    virtual ~BufFileInput();
+
+    // gets next char from stream
+
+    virtual int nextChar( void );
+
+    // looks in stream and compares next l characters with s
+    // returns the result of comparision
+
+    int lookahead( char* s );
+
+private:
+    FILE *input; // input stream;
+    int* buf;    // buffer
+    int  size;   // size of buffer
+    int  start;  // position of the first symbol in buffer
+    int  len;    // count of characters in buffers
+};
+
+#endif
+// end of file BufFileInput.h