/* $Revision Header * Header built automatically - do not edit! ************* * * (C) Copyright 1990 by Olaf 'Olsen' Barthel & MXM * * Name .....: ParseCode.c * Created ..: Monday 21-Jan-91 20:12 * Revision .: 0 * * Date Author Comment * ========= ======== ==================== * 21-Jan-91 Olsen Created this file! * * $Revision Header ********************************************************/ #include "TermGlobal.h" /* A couple of internally referenced variables. */ STATIC BYTE CharsInBuffer = 0; STATIC UBYTE SaveBuffer[30]; STATIC BYTE ScanStep = 0; /* External comparison routines. */ extern BYTE Num1(WORD Char); extern BYTE Num2(WORD Char); extern BYTE Num3(WORD Char); extern BYTE Num4(WORD Char); /* This structure describes an ANSI control sequence. */ struct ControlCode { UBYTE FirstChar; BYTE (*Match)(WORD Char); UBYTE LastChar; BYTE ExactSize; UBYTE * (*Func)(UBYTE *Buffer); }; /* At present 55 different control sequences are supported/trapped. */ #define NUM_CODES 55 /* This follows the control code information. */ struct ControlCode ANSICode[NUM_CODES] = { /* Single Character Sequences. */ 'D', NULL, 0 , 1, (APTR)CursorScrollDown, 'M', NULL, 0 , 1, (APTR)CursorScrollUp, 'E', NULL, 0 , 1, (APTR)NextLine, '7', NULL, 0 , 1, (APTR)SaveCursor, '8', NULL, 0 , 1, (APTR)LoadCursor, '=', NULL, 0 , 1, (APTR)NumericAppMode, '>', NULL, 0 , 1, (APTR)NumericAppMode, 'N', NULL, 0 , 1, (APTR)Ignore, 'O', NULL, 0 , 1, (APTR)Ignore, 'H', NULL, 0 , 1, (APTR)SetTab, 'Z', NULL, 0 , 1, (APTR)RequestTerminal, 'c', NULL, 0 , 1, (APTR)Reset, '<', NULL, 0 , 1, (APTR)Ignore, '~', NULL, 0 , 1, (APTR)Ignore, 'n', NULL, 0 , 1, (APTR)Ignore, '}', NULL, 0 , 1, (APTR)Ignore, 'o', NULL, 0 , 1, (APTR)Ignore, '|', NULL, 0 , 1, (APTR)Ignore, /* Double Character Sequences. */ '[', NULL, 's', 2, (APTR)SaveCursor, '[', NULL, 'u', 2, (APTR)LoadCursor, '(', NULL, 'A', 2, (APTR)FontStuff, '(', NULL, 'B', 2, (APTR)FontStuff, '(', NULL, '0', 2, (APTR)Ignore, /* was FontStuff, */ ')', NULL, 'A', 2, (APTR)FontStuff, ')', NULL, 'B', 2, (APTR)FontStuff, ')', NULL, '0', 2, (APTR)Ignore, /* was FontStuff, */ '#', NULL, '3', 2, (APTR)ScaleFont, '#', NULL, '4', 2, (APTR)ScaleFont, '#', NULL, '5', 2, (APTR)ScaleFont, '#', NULL, '6', 2, (APTR)ScaleFont, '#', NULL, '8', 2, (APTR)Ignore, ' ', NULL, 'F', 2, (APTR)Ignore, ' ', NULL, 'G', 2, (APTR)Ignore, /* Multiple Character Sequence. */ '[', Num3, 'i', 0, (APTR)Ignore, '[', Num3, 'n', 0, (APTR)RequestInformation, '[', Num3, 'c', 0, (APTR)RequestTerminal, '[', Num3, 'h', 0, (APTR)SetSomething, '[', Num3, 'l', 0, (APTR)SetSomething, '[', Num4, 'h', 0, (APTR)Ignore, '[', Num1, 'A', 0, (APTR)MoveCursor, '[', Num1, 'B', 0, (APTR)MoveCursor, '[', Num1, 'C', 0, (APTR)MoveCursor, '[', Num1, 'D', 0, (APTR)MoveCursor, '[', Num1, 'K', 0, (APTR)EraseLine, '[', Num1, 'J', 0, (APTR)EraseScreen, '[', Num1, 'P', 0, (APTR)EraseCharacters, '[', Num1, 'L', 0, (APTR)InsertLine, '[', Num1, 'M', 0, (APTR)ClearLine, '[', Num1, 'g', 0, (APTR)SetTabs, '[', Num1, 'q', 0, (APTR)Ignore, '[', Num2, 'H', 0, (APTR)SetPosition, '[', Num2, 'f', 0, (APTR)SetPosition, '[', Num2, 'm', 0, (APTR)SetAttributes, '[', Num2, 'y', 0, (APTR)Ignore, '[', Num2, 'r', 0, (APTR)SetRegion, }; /* DoCancel(): * * Cancel any currently scanned sequence. */ VOID DoCancel() { InSequence = FALSE; CharsInBuffer = ScanStep = 0; } /* CSIFake(): * * This routine was added to support 8-bit control * sequences introduced by a CSI character. */ VOID CSIFake() { /* Reset scanner */ DoCancel(); /* Perform as if ESC [ had been transmitted. */ InSequence = ParseCode('['); } /* ParseCode(UBYTE c): * * Input: A character to be passed through the ANSI code * parser. * * Output: FALSE if input characters did form a valid ANSI * control sequence or if input characters did not * form an ANSI control sequence at all. * * TRUE if input characters did possibly introduce * a valid ANSI control sequence. */ BYTE ParseCode(UBYTE c) { SHORT i; /* ScanStep = 0: This is the first character * to introduce a control sequence. */ if(!ScanStep) { /* Scan all available codes and try to find * a match. */ for(i = 0 ; i < NUM_CODES ; i++) { /* This character may introduce a * control sequence. */ if(ANSICode[i] . FirstChar == c) { /* If this is a single * character control sequence * call the approriate function * and exit immediately. */ if(ANSICode[i] . ExactSize == 1) { SaveBuffer[CharsInBuffer++] = c; SaveBuffer[CharsInBuffer] = 0; if(Config . Emulation != EMULATION_ATOMIC || Escape) { UBYTE *SomeString = ANSICode[i] . Func(&SaveBuffer[0]); if(SomeString) SerWrite(SomeString,strlen(SomeString)); } CharsInBuffer = ScanStep = 0; return(FALSE); } /* The length of this control * sequence is greater than * a single character. Save * the input character and * return. */ ScanStep = i; SaveBuffer[CharsInBuffer++] = c; return(TRUE); } } /* No control sequence introducing character * was found. */ /* No Match */ CharsInBuffer = ScanStep = 0; return(FALSE); } else { /* Length of the control sequence * overrides the boundary, exit * immediately! */ if(CharsInBuffer == 21) { /* No Match */ CharsInBuffer = ScanStep = 0; return(FALSE); } /* Scan the remaining codes for a match. */ for(i = ScanStep ; i < NUM_CODES ; i++) { /* This sequence begins with the * same character the parser was * initialized with, so let's take * a look at it. */ if(ANSICode[i] . FirstChar == SaveBuffer[0]) { /* This character is supposed to * terminate the sequence. So let's * exit. */ if(ANSICode[i] . LastChar == c) { SaveBuffer[CharsInBuffer++] = c; SaveBuffer[CharsInBuffer] = 0; if(Config . Emulation != EMULATION_ATOMIC || Escape) { UBYTE *SomeString = ANSICode[i] . Func(&SaveBuffer[0]); if(SomeString) SerWrite(SomeString,strlen(SomeString)); } CharsInBuffer = ScanStep = 0; return(FALSE); } else { if(ANSICode[i] . Match) { /* This character is part of * a legal sequence. Store it * and return. */ if(ANSICode[i] . Match(c)) { ScanStep = i; SaveBuffer[CharsInBuffer++] = c; return(TRUE); } } } } } /* This character is not part of a valid * ANSI control sequence, so exit. */ /* No Match */ CharsInBuffer = ScanStep = 0; return(FALSE); } }