Initial import.

[pforth] / csrc / pf_io.c

/* @(#) pf_io.c 96/12/23 1.12 */\r
/***************************************************************\r
** I/O subsystem for PForth based on 'C'\r
**\r
** Author: Phil Burk\r
** Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom\r
**\r
** The pForth software code is dedicated to the public domain,\r
** and any third party may reproduce, distribute and modify\r
** the pForth software code or any derivative works thereof\r
** without any compensation or license.  The pForth software\r
** code is provided on an "as is" basis without any warranty\r
** of any kind, including, without limitation, the implied\r
** warranties of merchantability and fitness for a particular\r
** purpose and their equivalents under the laws of any jurisdiction.\r
**\r
****************************************************************\r
** 941004 PLB Extracted IO calls from pforth_main.c\r
***************************************************************/\r
\r
#include "pf_all.h"\r
\r
\r
/***************************************************************\r
** Initialize I/O system.\r
*/\r
void ioInit( void )\r
{\r
	/* System dependant terminal initialization. */\r
	sdTerminalInit();\r
}\r
void ioTerm( void )\r
{\r
	sdTerminalTerm();\r
}\r
\r
/***************************************************************\r
** Send single character to output stream.\r
*/\r
void ioEmit( char c )\r
{\r
	int32 Result;\r
	\r
	Result = sdTerminalOut(c);\r
	if( Result < 0 ) EXIT(1);\r
	\r
	if( gCurrentTask )\r
	{\r
		if(c == '\n')\r
		{\r
			gCurrentTask->td_OUT = 0;\r
			sdTerminalFlush();\r
		}\r
		else\r
		{\r
			gCurrentTask->td_OUT++;\r
		}\r
	}\r
}\r
\r
/***************************************************************\r
** Send an entire string..\r
*/\r
void ioType( const char *s, int32 n )\r
{\r
	int32 i;\r
\r
	for( i=0; i<n; i++)\r
	{\r
		ioEmit ( *s++ );\r
	}\r
}\r
\r
/***************************************************************\r
** Return single character from input device, always keyboard.\r
*/\r
cell ioKey( void )\r
{\r
	cell c;\r
	sdEnableInput();\r
	c = sdTerminalIn();\r
	sdDisableInput();\r
	return c;\r
}\r
\r
/**************************************************************\r
** Receive line from keyboard.\r
** Return number of characters enterred.\r
*/\r
#define BACKSPACE  (8)\r
#define DELETE     (0x7F)\r
cell ioAccept( char *buffer, cell maxChars )\r
{\r
	int c;\r
	int len;\r
	char *p;\r
\r
DBUGX(("ioAccept(0x%x, 0x%x)\n", buffer, len ));\r
	\r
	sdEnableInput();\r
\r
	p = buffer;\r
	len = 0;\r
	while(len < maxChars)\r
	{\r
		c = sdTerminalIn();\r
		switch(c)\r
		{\r
			case '\r':\r
			case '\n':\r
				DBUGX(("EOL\n"));\r
				goto gotline;\r
				break;\r
				\r
			case BACKSPACE:\r
			case DELETE:\r
				if( len > 0 )  /* Don't go beyond beginning of line. */\r
				{\r
					EMIT(BACKSPACE);\r
					EMIT(' ');\r
					EMIT(BACKSPACE);\r
					p--;\r
					len--;\r
				}\r
				break;\r
				\r
			default:\r
				sdTerminalEcho( (char) c );\r
				*p++ = (char) c;\r
				len++;\r
				break;\r
		}\r
		\r
	}\r
\r
gotline:\r
	sdDisableInput();\r
\r
/* NUL terminate line to simplify printing when debugging. */\r
	if( len < maxChars ) p[len] = '\0';\r
		\r
	return len;\r
}\r
\r
#define UNIMPLEMENTED(name) { MSG(name); MSG("is unimplemented!\n"); }\r
\r
\r
/***********************************************************************************/\r
/*********** File I/O **************************************************************/\r
/***********************************************************************************/\r
#ifdef PF_NO_FILEIO\r
\r
/* Provide stubs for standard file I/O */\r
\r
FileStream *PF_STDIN;\r
FileStream *PF_STDOUT;\r
\r
int32  sdInputChar( FileStream *stream )\r
{\r
	UNIMPLEMENTED("sdInputChar");\r
	TOUCH(stream);\r
	return -1;\r
}\r
\r
FileStream *sdOpenFile( const char *FileName, const char *Mode )\r
{\r
	UNIMPLEMENTED("sdOpenFile");\r
	TOUCH(FileName);\r
	TOUCH(Mode);\r
	return NULL;\r
}\r
int32 sdFlushFile( FileStream * Stream  )\r
{\r
	TOUCH(Stream);\r
	return 0;\r
}\r
int32 sdReadFile( void *ptr, int32 Size, int32 nItems, FileStream * Stream  ) \r
{ \r
	UNIMPLEMENTED("sdReadFile");\r
	TOUCH(ptr);\r
	TOUCH(Size);\r
	TOUCH(nItems);\r
	TOUCH(Stream);\r
	return 0; \r
}\r
int32 sdWriteFile( void *ptr, int32 Size, int32 nItems, FileStream * Stream  )\r
{ \r
	UNIMPLEMENTED("sdWriteFile");\r
	TOUCH(ptr);\r
	TOUCH(Size);\r
	TOUCH(nItems);\r
	TOUCH(Stream);\r
	return 0; \r
}\r
int32 sdSeekFile( FileStream * Stream, int32 Position, int32 Mode ) \r
{ \r
	UNIMPLEMENTED("sdSeekFile");\r
	TOUCH(Stream);\r
	TOUCH(Position);\r
	TOUCH(Mode);\r
	return 0; \r
}\r
int32 sdTellFile( FileStream * Stream ) \r
{ \r
	UNIMPLEMENTED("sdTellFile");\r
	TOUCH(Stream);\r
	return 0; \r
}\r
int32 sdCloseFile( FileStream * Stream ) \r
{ \r
	UNIMPLEMENTED("sdCloseFile");\r
	TOUCH(Stream);\r
	return 0; \r
}\r
#endif\r
\r