michael@0: // Common/StdInStream.cpp
michael@0: 
michael@0: #include "StdAfx.h"
michael@0: 
michael@0: #include <tchar.h>
michael@0: #include "StdInStream.h"
michael@0: 
michael@0: static const char kIllegalChar = '\0';
michael@0: static const char kNewLineChar = '\n';
michael@0: 
michael@0: static const char *kEOFMessage = "Unexpected end of input stream";
michael@0: static const char *kReadErrorMessage  ="Error reading input stream"; 
michael@0: static const char *kIllegalCharMessage = "Illegal character in input stream";
michael@0: 
michael@0: static LPCTSTR kFileOpenMode = TEXT("r");
michael@0: 
michael@0: CStdInStream g_StdIn(stdin);
michael@0: 
michael@0: bool CStdInStream::Open(LPCTSTR fileName)
michael@0: {
michael@0:   Close();
michael@0:   _stream = _tfopen(fileName, kFileOpenMode);
michael@0:   _streamIsOpen = (_stream != 0);
michael@0:   return _streamIsOpen;
michael@0: }
michael@0: 
michael@0: bool CStdInStream::Close()
michael@0: {
michael@0:   if(!_streamIsOpen)
michael@0:     return true;
michael@0:   _streamIsOpen = (fclose(_stream) != 0);
michael@0:   return !_streamIsOpen;
michael@0: }
michael@0: 
michael@0: CStdInStream::~CStdInStream()
michael@0: {
michael@0:   Close();
michael@0: }
michael@0: 
michael@0: AString CStdInStream::ScanStringUntilNewLine()
michael@0: {
michael@0:   AString s;
michael@0:   while(true)
michael@0:   {
michael@0:     int intChar = GetChar();
michael@0:     if(intChar == EOF)
michael@0:       throw kEOFMessage;
michael@0:     char c = char(intChar);
michael@0:     if (c == kIllegalChar)
michael@0:       throw kIllegalCharMessage;
michael@0:     if(c == kNewLineChar)
michael@0:       return s;
michael@0:     s += c;
michael@0:   }
michael@0: }
michael@0: 
michael@0: void CStdInStream::ReadToString(AString &resultString)
michael@0: {
michael@0:   resultString.Empty();
michael@0:   int c;
michael@0:   while((c = GetChar()) != EOF)
michael@0:     resultString += char(c);
michael@0: }
michael@0: 
michael@0: bool CStdInStream::Eof()
michael@0: {
michael@0:   return (feof(_stream) != 0);
michael@0: }
michael@0: 
michael@0: int CStdInStream::GetChar()
michael@0: {
michael@0:   int c = getc(_stream);
michael@0:   if(c == EOF && !Eof())
michael@0:     throw kReadErrorMessage;
michael@0:   return c;
michael@0: }
michael@0: 
michael@0: