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/* @(#) pf_io.c 96/12/23 1.12 */
/***************************************************************
** I/O subsystem for PForth based on 'C'
**
** Author: Phil Burk
** Copyright 1994 3DO, Phil Burk, Larry Polansky, Devid Rosenboom
**
** The pForth software code is dedicated to the public domain,
** and any third party may reproduce, distribute and modify
** the pForth software code or any derivative works thereof
** without any compensation or license. The pForth software
** code is provided on an "as is" basis without any warranty
** of any kind, including, without limitation, the implied
** warranties of merchantability and fitness for a particular
** purpose and their equivalents under the laws of any jurisdiction.
**
****************************************************************
** 941004 PLB Extracted IO calls from pforth_main.c
***************************************************************/
#include "pf_all.h"
/***************************************************************
** Send single character to output stream.
*/
void ioEmit( char c )
{
int32 Result;
Result = sdTerminalOut(c);
if( Result < 0 ) EXIT(1);
if(c == '\n')
{
gCurrentTask->td_OUT = 0;
sdTerminalFlush();
}
else
{
gCurrentTask->td_OUT++;
}
}
void ioType( const char *s, int32 n )
{
int32 i;
for( i=0; i<n; i++)
{
ioEmit ( *s++ );
}
}
/***************************************************************
** Return single character from input device, always keyboard.
*/
cell ioKey( void )
{
return sdTerminalIn();
}
/**************************************************************
** Receive line from input stream.
** Return length, or -1 for EOF.
*/
#define BACKSPACE (8)
cell ioAccept( char *Target, cell MaxLen, FileStream *stream )
{
int32 c;
int32 Len;
char *p;
DBUGX(("ioAccept(0x%x, 0x%x, 0x%x)\n", Target, Len, stream ));
p = Target;
Len = MaxLen;
while(Len > 0)
{
if( stream == PF_STDIN )
{
c = ioKey();
/* If KEY does not echo, then echo here. If using getchar(), KEY will echo. */
#ifndef PF_KEY_ECHOS
ioEmit( c );
if( c == '\r') ioEmit('\n'); /* Send LF after CR */
#endif
}
else
{
c = sdInputChar(stream);
}
switch(c)
{
case EOF:
DBUG(("EOF\n"));
return -1;
break;
case '\r':
case '\n':
*p++ = (char) c;
DBUGX(("EOL\n"));
goto gotline;
break;
case BACKSPACE:
if( Len < MaxLen ) /* Don't go beyond beginning of line. */
{
EMIT(' ');
EMIT(BACKSPACE);
p--;
Len++;
}
break;
default:
*p++ = (char) c;
Len--;
break;
}
}
gotline:
*p = '\0';
return pfCStringLength( Target );
}
#define UNIMPLEMENTED(name) { MSG(name); MSG("is unimplemented!\n"); }
#ifdef PF_NO_CHARIO
int sdTerminalOut( char c )
{
TOUCH(c);
return 0;
}
int sdTerminalIn( void )
{
return -1;
}
int sdTerminalFlush( void )
{
return -1;
}
#endif
/***********************************************************************************/
#ifdef PF_NO_FILEIO
/* Provide stubs for standard file I/O */
FileStream *PF_STDIN;
FileStream *PF_STDOUT;
int32 sdInputChar( FileStream *stream )
{
UNIMPLEMENTED("sdInputChar");
TOUCH(stream);
return -1;
}
FileStream *sdOpenFile( const char *FileName, const char *Mode )
{
UNIMPLEMENTED("sdOpenFile");
TOUCH(FileName);
TOUCH(Mode);
return NULL;
}
int32 sdFlushFile( FileStream * Stream )
{
TOUCH(Stream);
return 0;
}
int32 sdReadFile( void *ptr, int32 Size, int32 nItems, FileStream * Stream )
{
UNIMPLEMENTED("sdReadFile");
TOUCH(ptr);
TOUCH(Size);
TOUCH(nItems);
TOUCH(Stream);
return 0;
}
int32 sdWriteFile( void *ptr, int32 Size, int32 nItems, FileStream * Stream )
{
UNIMPLEMENTED("sdWriteFile");
TOUCH(ptr);
TOUCH(Size);
TOUCH(nItems);
TOUCH(Stream);
return 0;
}
int32 sdSeekFile( FileStream * Stream, int32 Position, int32 Mode )
{
UNIMPLEMENTED("sdSeekFile");
TOUCH(Stream);
TOUCH(Position);
TOUCH(Mode);
return 0;
}
int32 sdTellFile( FileStream * Stream )
{
UNIMPLEMENTED("sdTellFile");
TOUCH(Stream);
return 0;
}
int32 sdCloseFile( FileStream * Stream )
{
UNIMPLEMENTED("sdCloseFile");
TOUCH(Stream);
return 0;
}
#endif
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