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amigaio.c
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amigaio.c
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/* amigaio.c ******************************************************************
*
* Minimal Amiga interface for Mark Howell's `ZIP' Infocom Interpreter
* Program. This is public-domain, no distribution restrictions apply.
*
* Written by Olaf `Olsen' Barthel, 5 September 1993
*
* This minimal interface is guaranteed to work both unter Kickstart
* 1.2/1.3 and Kickstart 2.0 (or higher if you can afford it).
*
* The screen drag bar is left intact, it is reduced to four lines. The
* input procedure uses the following keys:
*
* Return.............. Terminates input
* Control-X........... Erases the input line
* Backspace........... Deletes the character to the left of the cursor
* Delete.............. Deletes the character under the cursor
* Cursor left......... Moves the cursor to the left
* Shift cursor left... Moves the cursor to the beginning of the line
* Cursor right........ Moves the cursor to the right
* Shift cursor right.. Moves the cursor to the end of the line
* Cursor up........... Moves up in history list
* Shift cursor up..... Moves to first history line
* Cursor down......... Moves down in history list
* Shift cursor down... Moves to end of history list
* Help................ Define function key
* F1-F10.............. Function keys
* Numeric keypad...... Movement
*
* An ANSI `C' compatible compiler is required to compile this source
* code (e.g. SAS/C 5.x - 6.x, Aztec C 5.x, DICE, GCC).
*
*****************************************************************************/
#include <intuition/intuitionbase.h>
#include <libraries/dosextens.h>
#include <workbench/workbench.h>
#include <libraries/diskfont.h>
#include <workbench/startup.h>
#include <graphics/gfxbase.h>
#include <devices/conunit.h>
#include <devices/audio.h>
#include <devices/timer.h>
#include <exec/memory.h>
#ifdef __GNUC__
#include <inline/stubs.h>
#include <inline/intuition.h>
#include <inline/graphics.h>
#include <inline/exec.h>
#include <inline/dos.h>
#include <signal.h>
/* Signals to trap while running. */
#define TRAPPED_SIGNALS (sigmask(SIGINT) | sigmask(SIGQUIT) | sigmask(SIGILL) | sigmask(SIGTRAP) | sigmask(SIGABRT) | sigmask(SIGEMT) | sigmask(SIGFPE) | sigmask(SIGBUS) | sigmask(SIGSEGV) | sigmask(SIGSYS) | sigmask(SIGALRM) | sigmask(SIGTERM) | sigmask(SIGTSTP))
#endif /* __GNUC__ */
#include <clib/intuition_protos.h>
#include <clib/graphics_protos.h>
#include <clib/console_protos.h>
#include <clib/icon_protos.h>
#include <clib/alib_protos.h>
#include <clib/exec_protos.h>
#include <clib/dos_protos.h>
/* Some help to keep the code size down. */
#ifdef AZTEC_C
extern struct ExecBase *SysBase;
#include <pragmas/exec_lib.h>
#endif /* AZTEC_C */
#ifdef LATTICE
extern struct ExecBase *SysBase;
#include <pragmas/exec_pragmas.h>
#endif /* LATTICE */
#include <stdarg.h>
#include "ztypes.h"
/* Disable ^C trapping for several Amiga `C' compilers. */
#ifdef LATTICE
ULONG CXBRK(VOID) { return(0); }
void chkabort(void) {}
void Chk_abort(void) {}
#endif /* LATTICE */
#ifdef AZTEC_C
LONG Chk_Abort(VOID) { return(0); }
VOID _wb_parse(VOID) {}
#endif /* AZTEC_C */
/* Text rendering colours. */
enum { COLOUR_INPUT, COLOUR_TEXT, COLOUR_RESET };
/* Version identifier tag. */
STATIC char *VersionTag = "\0$VER: AmigaZIP 3.3 (23.8.93)";
/* Control sequence introducer. */
#define TERM_CSI 0x9B
/* Backspace character. */
#define TERM_BS '\b'
/* Delete character. */
#define TERM_DEL 0x7F
/* Return character. */
#define TERM_CR '\r'
/* Control-X */
#define TERM_X 0x18
/* Margin between screen top and window top. */
#define SCREEN_MARGIN 4
/* How many history lines to keep. */
#ifndef HISTORY_LINES
#define HISTORY_LINES 20
#endif /* !HISTORY_LINES */
/* Number of function keys. */
#define NUM_FKEYS 20
/* Length of `fake' input string. */
#define INPUT_LENGTH 1024
/* Minimum system software release version. */
#define LIB_VERSION 33
/* A second measured in microseconds. */
#define SECOND 1000000
/* Two signals to wait for. */
#define SIG_WINDOW (1 << Window -> UserPort -> mp_SigBit)
#define SIG_TIMER (1 << TimePort -> mp_SigBit)
/* Audio channel bits. */
#define LEFT0F 1
#define RIGHT0F 2
#define RIGHT1F 4
#define LEFT1F 8
/* The two windows. */
enum { WINDOW_TEXT,WINDOW_STATUS };
/* Cursor widths. */
enum { CURSOR_AVERAGE = -1,CURSOR_NOCHANGE = 0 };
/* History structure. */
struct StringEntry
{
int Len; /* Length of the string. */
STRPTR Buffer; /* The string itself. */
};
/* Global libraries (don't touch!) */
struct IntuitionBase *IntuitionBase;
struct GfxBase *GfxBase;
struct Library *IconBase;
struct Device *ConsoleDevice;
/* Workbench startup message. */
STATIC struct WBStartup *WBenchMsg;
/* Screen and window data. */
STATIC struct Screen *Screen;
STATIC struct Window *Window;
STATIC struct RastPort *RPort;
STATIC UBYTE Depth;
/* Console IO data. */
STATIC struct IOStdReq *ConRequest;
STATIC struct InputEvent *InputEvent;
STATIC STRPTR InputEventBuffer;
STATIC LONG CursorX,
CursorY,
LastX,
LastY,
OldWidth,
NewWidth,
WindowWidth;
STATIC BOOL CursorState,
Redraw,
IsInverse;
STATIC LONG SavedX,SavedY;
STATIC BOOL SavedCursor = FALSE;
STATIC STRPTR InputBackup = NULL;
STATIC BOOL PrivateColour = TRUE;
/* Two different fonts. */
STATIC struct TextFont *PropFont,
*FixedFont,
*ThisFont;
STATIC UBYTE GfxFontPath[256];
/* Graphics font for `Beyond Zork'. */
STATIC BPTR GfxSegment = NULL;
STATIC struct TextFont *GfxFont = NULL;
/* Default colour tables for `Beyond Zork'. */
STATIC UWORD DefaultColours[4][8] =
{
0x0000,0x0FFF,0x005A,0x00C0,
0x0E00,0x0EE0,0x0F0F,0x00EE,
0x0000,0x005A,0x0FFF,0x00C0,
0x0E00,0x0EE0,0x0F0F,0x00EE,
0x005A,0x0000,0x0FFF,0x00C0,
0x0E00,0x0EE0,0x0F0F,0x00EE,
0x0FFF,0x0000,0x005A,0x00C0,
0x0E00,0x0EE0,0x0F0F,0x00EE
};
/* Text font dimensions. */
STATIC UWORD TextFontWidth,
TextFontHeight,
TextFontAverage;
/* Console data. */
STATIC UBYTE ConChar;
STATIC char *ConLine;
STATIC int ConLineLength,
ConLineMaxLength,
ConLineMinLength;
STATIC UBYTE ConFgPen,
ConBgPen,
ConStyle;
STATIC UBYTE SavedFgPen,
SavedBgPen,
SavedStyle;
STATIC BOOL SavedData = FALSE;
/* Timer data. */
STATIC struct MsgPort *TimePort;
STATIC struct timerequest *TimeRequest;
/* Process and DOS tricks. */
STATIC struct Process *ThisProcess;
STATIC APTR WindowPtr;
/* History management. */
STATIC struct StringEntry HistoryBuffer[HISTORY_LINES];
STATIC int LastHistory = -1;
/* Function key support. */
STATIC struct StringEntry FunctionKeys[NUM_FKEYS];
/* Fake input buffer. */
STATIC UBYTE InputBuffer[INPUT_LENGTH];
STATIC STRPTR InputIndex;
/* The currently active text window. */
STATIC int CurrentWindow = WINDOW_TEXT;
/* Current game file name and interpreter program name. */
STATIC STRPTR StoryName,
InterpreterName;
/* Sound support. */
STATIC struct IOAudio *SoundRequestLeft,
*SoundRequestRight,
*SoundControlRequest;
STATIC struct MsgPort *SoundPort;
STATIC BOOL SoundPlayed = FALSE;
/* Sound file search path. */
STATIC char *SoundName,
*SoundPath;
/* Sound data storage. */
STATIC int SoundNumber = -1;
STATIC APTR SoundData;
STATIC LONG SoundLength,
SoundCycles;
/* Sound dynamic volume control */
STATIC int SoundVolume,
SoundDelta,
SoundCount;
/* Custom routines, local. */
STATIC BYTE SoundInit(VOID);
STATIC VOID SoundExit(VOID);
STATIC VOID SoundAbort(VOID);
STATIC VOID SoundStop(VOID);
STATIC VOID SoundStart(VOID);
STATIC VOID SoundSchedule(VOID);
STATIC WORD ConCharWidth(const UBYTE Char);
STATIC VOID ConCursorOff(VOID);
STATIC VOID ConCursorOn(const int New);
STATIC VOID ConMove(const int Delta,const int New);
STATIC VOID ConSet(const int X,const int Y,const int New);
STATIC VOID ConClearEOL(VOID);
STATIC VOID ConCharBackspace(const int Delta,const int New);
STATIC VOID ConCharDelete(const int New);
STATIC VOID ConCharInsert(const UBYTE Char);
STATIC VOID ConScrollUp(VOID);
STATIC VOID ConWrite(char *Line,int Len);
STATIC VOID ConRedraw(const int X,const int Y,const STRPTR String,const int Len);
STATIC VOID ConSetKey(int Key,STRPTR String,int Len);
STATIC VOID ConFlush(VOID);
STATIC WORD ConGetChar(BOOL SingleKey,BOOL RawKeys,int *Timeout,int *x,int *y,BOOL *NumPad);
STATIC VOID ConPrintf(char *Format,...);
STATIC int ConInput(char *Prompt,int MaxLen,char *Input,int Timeout,int *BytesRead,BOOL DoHistory);
/* SoundInit():
*
* Allocate resources for sound routine.
*/
STATIC BYTE
SoundInit()
{
/* Create io reply port. */
if(SoundPort = (struct MsgPort *)CreatePort(NULL,0))
{
/* Create io control request. We will use it
* later to change the volume of a sound.
*/
if(SoundControlRequest = (struct IOAudio *)CreateExtIO(SoundPort,sizeof(struct IOAudio)))
{
/* Create io request for left channel. */
if(SoundRequestLeft = (struct IOAudio *)CreateExtIO(SoundPort,sizeof(struct IOAudio)))
{
/* Create io request for right channel. */
if(SoundRequestRight = (struct IOAudio *)CreateExtIO(SoundPort,sizeof(struct IOAudio)))
{
/* Channel allocation map,
* we want any two stereo
* channels.
*/
STATIC UBYTE AllocationMap[] =
{
LEFT0F | RIGHT0F,
LEFT0F | RIGHT1F,
LEFT1F | RIGHT0F,
LEFT1F | RIGHT1F
};
/* Set it up for channel allocation,
* any two stereo channels will do.
*/
SoundControlRequest -> ioa_Request . io_Message . mn_Node . ln_Pri = 127;
SoundControlRequest -> ioa_Request . io_Command = ADCMD_ALLOCATE;
SoundControlRequest -> ioa_Request . io_Flags = ADIOF_NOWAIT | ADIOF_PERVOL;
SoundControlRequest -> ioa_Data = AllocationMap;
SoundControlRequest -> ioa_Length = sizeof(AllocationMap);
/* Open the device, allocating the channel on the way. */
if(!OpenDevice(AUDIONAME,NULL,(struct IORequest *)SoundControlRequest,NULL))
{
/* Copy the initial data to the
* other audio io requests.
*/
CopyMem((BYTE *)SoundControlRequest,(BYTE *)SoundRequestLeft, sizeof(struct IOAudio));
CopyMem((BYTE *)SoundControlRequest,(BYTE *)SoundRequestRight,sizeof(struct IOAudio));
/* Divide the channels. */
SoundRequestLeft -> ioa_Request . io_Unit = (struct Unit *)((ULONG)SoundRequestLeft -> ioa_Request . io_Unit & (LEFT0F | LEFT1F));
SoundRequestRight -> ioa_Request . io_Unit = (struct Unit *)((ULONG)SoundRequestRight -> ioa_Request . io_Unit & (RIGHT0F | RIGHT1F));
/* Return success. */
return(TRUE);
}
}
}
}
}
/* Clean up... */
SoundExit();
/* ...and return failure. */
return(FALSE);
}
/* SoundExit():
*
* Free resources allocated by SoundInit().
*/
STATIC VOID
SoundExit()
{
/* Free the left channel data. */
if(SoundRequestLeft)
{
/* Did we open the device? */
if(SoundRequestLeft -> ioa_Request . io_Device && SoundPlayed)
{
/* Check if the sound is still playing. */
if(!CheckIO((struct IORequest *)SoundRequestLeft))
{
/* Abort the request. */
AbortIO((struct IORequest *)SoundRequestLeft);
/* Wait for it to return. */
WaitIO((struct IORequest *)SoundRequestLeft);
}
else
GetMsg(SoundPort);
}
/* Free the memory allocated. */
DeleteExtIO((struct IORequest *)SoundRequestLeft);
/* Leave no traces. */
SoundRequestLeft = NULL;
}
/* Free the right channel data. */
if(SoundRequestRight)
{
/* Did we open the device? */
if(SoundRequestRight -> ioa_Request . io_Device && SoundPlayed)
{
/* Check if the sound is still playing. */
if(!CheckIO((struct IORequest *)SoundRequestRight))
{
/* Abort the request. */
AbortIO((struct IORequest *)SoundRequestRight);
/* Wait for it to return. */
WaitIO((struct IORequest *)SoundRequestRight);
}
else
GetMsg(SoundPort);
}
/* Free the memory allocated. */
DeleteExtIO((struct IORequest *)SoundRequestRight);
/* Leave no traces. */
SoundRequestRight = NULL;
}
/* Free sound control request. */
if(SoundControlRequest)
{
/* Close the device, free any allocated channels. */
if(SoundControlRequest -> ioa_Request . io_Device)
CloseDevice((struct IORequest *)SoundControlRequest);
/* Free the memory allocated. */
DeleteExtIO((struct IORequest *)SoundControlRequest);
/* Leave no traces. */
SoundControlRequest = NULL;
}
/* Free sound io reply port. */
if(SoundPort)
{
/* Delete it. */
DeletePort(SoundPort);
/* Leave no traces. */
SoundPort = NULL;
}
/* Free sound data. */
if(SoundData)
{
/* Free it. */
if(SoundLength)
FreeMem(SoundData,SoundLength);
/* Leave no traces. */
SoundData = NULL;
SoundLength = 0;
}
/* Clear current sound number. */
SoundNumber = -1;
/* No resources were allocated. */
SoundPlayed = FALSE;
}
/* SoundAbort():
*
* Abort any currently playing sound and wait for
* both IORequests to return.
*/
STATIC VOID
SoundAbort()
{
/* Did we play any sound at all? */
if(SoundPlayed)
{
/* Abort sound playing on the left channel. */
if(!CheckIO((struct IORequest *)SoundRequestLeft))
AbortIO((struct IORequest *)SoundRequestLeft);
/* Wait for the request to return. */
WaitIO((struct IORequest *)SoundRequestLeft);
/* Abort sound playing on the right channel. */
if(!CheckIO((struct IORequest *)SoundRequestRight))
AbortIO((struct IORequest *)SoundRequestRight);
/* Wait for the request to return. */
WaitIO((struct IORequest *)SoundRequestRight);
/* No sound is currently being played. */
SoundPlayed = FALSE;
}
}
/* SoundStop():
*
* Stop sound from getting played (somewhat equivalent to ^S).
*/
STATIC VOID
SoundStop()
{
/* Fill in the command. */
SoundControlRequest -> ioa_Request . io_Command = CMD_STOP;
/* Send it off. */
BeginIO((struct IORequest *)SoundControlRequest);
WaitIO((struct IORequest *)SoundControlRequest);
}
/* SoundStart():
*
* Restart any queued sound.
*/
STATIC VOID
SoundStart()
{
/* Fill in the command. */
SoundControlRequest -> ioa_Request . io_Command = CMD_START;
/* Send it off. */
BeginIO((struct IORequest *)SoundControlRequest);
WaitIO((struct IORequest *)SoundControlRequest);
SoundPlayed = TRUE;
}
/* SoundSchedule():
*
* Perform fade in/out effects.
*/
STATIC VOID
SoundSchedule()
{
/* This routine will get invoked twice a second. */
if(SoundCount++ == 2)
{
SoundCount = 0;
/* Fade out? */
if(SoundDelta < 0)
{
/* Any volume left to lower? */
if(SoundVolume > 0)
{
/* Fade out. */
SoundVolume += SoundDelta;
/* Avoid unpleasant effects. */
if(SoundVolume < 0)
SoundVolume = 0;
SoundControlRequest -> ioa_Request . io_Command = ADCMD_PERVOL;
SoundControlRequest -> ioa_Request . io_Flags = ADIOF_SYNCCYCLE | ADIOF_PERVOL;
SoundControlRequest -> ioa_Volume = SoundVolume;
BeginIO((struct IORequest *)SoundControlRequest);
WaitIO((struct IORequest *)SoundControlRequest);
}
else
{
SoundAbort();
SoundDelta = 0;
}
}
else
{
/* Maximum volume reached? */
if(SoundVolume < 64)
{
/* Fade in. */
SoundVolume += SoundDelta;
/* Avoid unpleasant effects. */
if(SoundVolume > 64)
SoundVolume = 64;
SoundControlRequest -> ioa_Request . io_Command = ADCMD_PERVOL;
SoundControlRequest -> ioa_Request . io_Flags = ADIOF_SYNCCYCLE | ADIOF_PERVOL;
SoundControlRequest -> ioa_Volume = SoundVolume;
BeginIO((struct IORequest *)SoundControlRequest);
WaitIO((struct IORequest *)SoundControlRequest);
}
else
{
SoundAbort();
SoundDelta = 0;
}
}
}
}
/* ConSetColour(const int Mode):
*
* Set text rendering colours.
*/
VOID
ConSetColour(const int Mode)
{
/* Are we to use our own colour set? */
if(PrivateColour)
{
switch(Mode)
{
case COLOUR_INPUT: SavedFgPen = ConFgPen;
SavedBgPen = ConBgPen;
SavedStyle = ConStyle;
SavedData = TRUE;
if(ConStyle != FS_NORMAL)
SetSoftStyle(RPort,ConStyle = FS_NORMAL,AskSoftStyle(RPort));
if(Depth > 1)
{
if(ConFgPen != 2)
SetAPen(RPort,ConFgPen = 2);
}
else
{
if(ConFgPen != 1)
SetAPen(RPort,ConFgPen = 1);
}
break;
case COLOUR_TEXT: SavedFgPen = ConFgPen;
SavedBgPen = ConBgPen;
SavedStyle = ConStyle;
SavedData = TRUE;
if(ConStyle != FS_NORMAL && h_type < V4)
SetSoftStyle(RPort,ConStyle = FS_NORMAL,AskSoftStyle(RPort));
if(ConFgPen != 1)
SetAPen(RPort,ConFgPen = 1);
break;
case COLOUR_RESET: if(SavedData)
{
if(ConFgPen != SavedFgPen)
SetAPen(RPort,ConFgPen = SavedFgPen);
if(ConBgPen != SavedBgPen)
SetBPen(RPort,ConBgPen = SavedBgPen);
if(ConStyle != SavedStyle)
SetSoftStyle(RPort,ConStyle = SavedStyle,AskSoftStyle(RPort));
SavedData = FALSE;
}
break;
}
}
}
/* ConCharWidth(const UBYTE Char):
*
* Calculate the pixel width of a glyph.
*/
STATIC WORD
ConCharWidth(const UBYTE Char)
{
return(TextLength(RPort,(STRPTR)&Char,1));
}
/* ConCursorOff():
*
* Turn the terminal cursor on.
*/
STATIC VOID
ConCursorOff()
{
/* Is it still enabled? */
if(CursorState)
{
/* Remove the cursor. */
SetAPen(RPort,(1 << Depth) - 1);
SetDrMd(RPort,COMPLEMENT | JAM2);
RectFill(RPort,LastX,LastY,LastX + NewWidth - 1,LastY + TextFontHeight - 1);
SetAPen(RPort,ConFgPen);
SetDrMd(RPort,JAM2);
/* It's turned off now. */
CursorState = FALSE;
}
}
/* ConCursorOn(const int New):
*
* Turn the terminal cursor off.
*/
STATIC VOID
ConCursorOn(const int New)
{
/* Is it still disabled? */
if(!CursorState)
{
/* Remember new cursor width. */
switch(New)
{
case CURSOR_NOCHANGE: break;
case CURSOR_AVERAGE: NewWidth = TextFontAverage;
break;
default: NewWidth = New;
break;
}
/* Turn the cursor back on. */
SetAPen(RPort,(1 << Depth) - 1);
SetDrMd(RPort,COMPLEMENT | JAM2);
RectFill(RPort,CursorX,CursorY,CursorX + NewWidth - 1,CursorY + TextFontHeight - 1);
SetAPen(RPort,ConFgPen);
SetDrMd(RPort,JAM2);
/* Remember cursor width. */
OldWidth = NewWidth;
/* It's turn on now. */
CursorState = TRUE;
/* Remember cursor position. */
LastX = CursorX;
LastY = CursorY;
}
}
/* ConMove(const int Delta,const int New):
*
* Move the cursor.
*/
STATIC VOID
ConMove(const int Delta,const int New)
{
/* If the cursor is still enabled, turn it
* off before repositioning it.
*/
if(CursorState)
{
/* Turn the cursor off. */
ConCursorOff();
/* Move it. */
CursorX += Delta;
/* Turn the cursor back on. */
ConCursorOn(New);
}
else
{
switch(New)
{
case CURSOR_NOCHANGE: break;
case CURSOR_AVERAGE: NewWidth = TextFontAverage;
break;
default: NewWidth = New;
break;
}
CursorX += Delta;
}
}
/* ConSet(const int X,const int Y,const int New):
*
* Place the cursor at a specific position.
*/
STATIC VOID
ConSet(const int X,const int Y,const int New)
{
/* If the cursor is still enabled, turn it
* off before repositioning it.
*/
if(CursorState)
{
/* Turn the cursor off. */
ConCursorOff();
/* Move drawing pen. */
Move(RPort,X,Y + ThisFont -> tf_Baseline);
/* Position the cursor. */
CursorX = X;
CursorY = Y;
/* Turn the cursor back on. */
ConCursorOn(New);
}
else
{
/* Remember new cursor width. */
switch(New)
{
case CURSOR_NOCHANGE: break;
case CURSOR_AVERAGE: NewWidth = OldWidth = TextFontAverage;
break;
default: NewWidth = OldWidth = New;
break;
}
/* Move drawing pen. */
Move(RPort,X,Y + ThisFont -> tf_Baseline);
/* Position the cursor. */
CursorX = X;
CursorY = Y;
}
}
/* ConClearEOL():
*
* Clear to end of current line.
*/
STATIC VOID
ConClearEOL()
{
/* Is there anything to clear? */
if(CursorX < WindowWidth)
{
/* Turn the cursor off before the line is cleared. */
if(CursorState)
{