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mac-rom/Toolbox/ScriptMgr/RomanUtil.a

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Bring in CubeE sources Resource forks are included only for .rsrc files. These are DeRezzed into their data fork. 'ckid' resources, from the Projector VCS, are not included. The Tools directory, containing mostly junk, is also excluded.
2017-09-17 09:09:04 +00:00
;
; File: RomanUtil.a
;
; Contains: Character drawing and measurement routines for the Roman script. These routines
; support the Roman script through the ScriptUtil trap.
;
; Written by: JDT Joe Ternasky
; KWK Ken Krugler
; MED Mark Davis
; LDC Lee Collins
; PKE Peter Edberg
; SMB Sue Bartalo
;
; Copyright: <09> 1986-1992 by Apple Computer, Inc. All rights reserved.
;
; Change History (most recent first):
;
; <SM4> 11/6/92 SWC Changed PackMacs.a->Packages.a.
; <20> 5/31/92 FM Deleted ParseTable and CharType from this file. They were
; conditionalized forRom. They are no longer needed now that the
; rom build includes ScriptMgrExtensions.a.
; <19> 4/29/92 FM Get rid of conditionals: romanDoSimpleScripts,
; smgrSys7Extensions, smgrROMVers
; <18> 4/22/92 PKE #1027368,<FM>: Make Roman CharType handle the direction bit too
; (so one-byte extension can just call the Roman one, and we will
; use the same format for all one-byte tables). For System builds,
; move it to ptch 27 since we patch it out completely.
; <17> 4/14/92 PKE #1026778,<yds>: To make FindWord not depend on having script
; code passed in d2 (script code will not be in d2 when it is
; called from one-byte extension), change Roman dispatcher to
; replace selector on stack with ScriptRecord pointer, and get
; script code from new scriptID field of ScriptRecord instead of
; from d2. Do this for CharType & Transliterate too. Remove some
; code conditionalized for pre-7.0.
; <16> 4/8/92 PKE #1026515,<cv>: Roman FindWord should not require that itl2 be in
; new format in order to handle custom break tables (passed by
; pointer). Thanks to Hani Abdelazim for noticing this and
; supplying fix.
; <15> 2/13/92 PKE #1021419, Cube-E: Make Roman dispatcher handle nil entries in
; dispatcher table.
; <14> 12/17/91 PKE #1018346: Fix bug introduced in <13>. Call IUGetScriptItl with
; script code passed from ScriptMgr dispatcher, so it works for
; simple scripts too (don't assume script is smRoman).
; <13> 10/8/91 PKE For Cube-E (and Bruges): When getting tables from 'itl2', use
; IUGetScriptItl instead of using IUGetIntl with IntlForce off.
; Part of fix for bug #1013149. Include IntlUtilsPriv.a. Clean up
; some conditionals and remove code that is conditionalized out.
; <12> 7/23/90 PKE For 7.0, move romanDispTable (table of offsets used to
; initialize dispatch table) to end of ScriptMgrInit.a, so it gets
; cut back. Use smgrSixPack instead of $606.
; <11> 5/29/90 PKE NEEDED FOR SIXPACK DISK: Moved ParseTable to ptch 27 so we can
; fix an old unbalanced stack bug in both RAM and ROM versions.
; Stuff a dummy ParseTable vector here; it will be updated by ptch
; 27. All these changes are flagged with <11>.
; <10> 4/10/90 PKE Used smgrSysVers, smgrROMVers, smgrSys7Extensions symbols
; instead of SysVers, buildLevel, and some forRom symbols. Deleted
; conditionalized definitions of SysVers and Scripts604. Started
; organizing for ROMification of 7.0 extensions. Included
; VisibleLength in main proc and exported label; included
; FindScriptRun if it<69>s here. Renamed Roman versions of GetScript
; and SetScript to rGetScript, rSetScript.
; <9> 3/27/90 PKE Missed a couple of places where I should use romanKeepSelector
; conditional.
; <8> 3/26/90 PKE Needed more complicated conditionals around BitBucket and
; BitBucketReg in romanTable.
; <7> 3/21/90 EMT Removed unnecessary ROM85 references and oldMacTweek code.
; <6> 3/21/90 SMB For 7.0, we moved FindScriptRun to ptch 27.
; <5> 3/19/90 PKE Use new feature conditionals smgrUseStdExit,
; smgrUseDispTablePtr, and romanKeepSelector. Rearranged
; RomanScript dispatcher so we can use these conditionals. Deleted
; obsolete definition: if forRom undefined, then forRom equ 0.
; <4> 2/22/90 PKE For 7.0, move Char2Pixel, DrawJust, MeasureJust, and FixSpExtra
; code to ptch 27 (ScriptMgrExtTail.a) so we can make changes in
; ROM too. Used dummy vector for Char2Pixel, DrawJust, MeasureJust
; in RomanUtil table here; ptch 27 will stuff real vector.
; <3> 1/30/90 PKE NEEDED FOR 6.0.5: Changed conditionals so some ROM and System 7
; bug fixes also go in System 6.0.5. (1) Fix for VisibleLength
; when called with a null string. (2) Fix divide by zero problem
; in FixSpExtra.
; <2> 1/11/90 PKE For 7.0, moved PortionText, Pixel2Char to ptch 27 because we
; completely patch out the ROM versions of these routines. Used a
; dummy vector for these routines in RomanUtil table here - ptch
; 27 will stuff the real vector. Also use dummy vectors for Kanji
; private routines and new 7.0 routines - ptch 27 will update the
; vectors for the new routines. Updated header to BBS format and
; fixed up tabs throughout.
; <1> 12/18/89 CCH Adding for the first time into BBS. Changed include 'inc.sum.a'
; to load 'StandardEqu.d'. Updated file name references.
; (BBS versions above, EASE versions below)
; <2.4> 8/26/89 PKE Cleaned up conditionals, changing newItl2Tables to buildLevel >=
; 1. Deleted obsolete itlr stuff (never got built).
; <2.3> 8/24/89 PKE NEEDED FOR 6.0.4 SCRIPTS BUILD, 6.0.5: Conditionalize (2.1).
; Remove some gratuitous conditionals. NOTE: May have to add back
; load 'nEqu.d' when we roll this over to Fiction for SS-6.0.4
; (Scripts) build.
; <2.2> 8/22/89 SES Removed references to nFiles.
; <2.1> 8/21/89 PKE NEEDED FOR 6.0.4 SCRIPTS BUILD, 6.0.5: Change CharType/
; Transliterate/ FindWord to save IntlForce flag then clear it
; before IUGetIntl call, restoring it afterward. This is so we get
; the itl2 tables for the correct script (instead of the tables
; for the system script).
; <2.0> 8/21/89 PKE NEEDED FOR 6.0.4!!: Fix me-too problem with pointer to unlocked
; handle in Transliterate; affects Roman system (this problem
; looks familiar; did I dream that I already fixed this one?).
; <1.9> 6/30/89 PKE NEEDED FOR AURORA AND 6.0.4: Clean up register usage in
; CharType; add some comments (stuff from code review).
; <1.8> 6/23/89 PKE Skip definition of buildLevel (done in ScriptPriv.a).
; <1.7> 6/5/89 PKE Add more error checking after IUGetIntl calls and set related
; error return values (for CharType, Transliterate, FindWord).
; <1.6> 5/30/89 PKE (ROM & 7.0 only) Fix bug in which VisibleLength returns 1 for
; null string (BRC #44640).
; <1.5> 4/26/89 PKE (ROM & 7.0 only) Change RomanUtil to use dispatch tables in RAM,
; accessed through pointer/limits in ScriptRecord.
; <1.4> 3/13/89 PKE Fixed CharType trashing of a2/a3, Transliterate trashing of a4
; (a consequence of the itl2 changes). Oops.
; <1.3> 2/21/89 PKE Replaced with RomProj version, which already had system and Rom
; sources merged.
; (EASE ROMproj history below)
; <1.6> 2/21/89 PKE Get CharType/Transliterate/FindWord tables from itl2, not itlR;
; do this for all new Systems and ROMs. Get rid of itlR. Use
; include 'inc.sum.a' (not inc.sum.src.a), not load 'inc.sum.d'.
; <1.5> 2/14/89 PKE Updated to use MPW 3.0 final ScriptEqu.a equate names
; <1.4> 2/3/89 PKE Merged with current system sources (CCH's 01/16/1989 merge of
; 6.0.3 and 7.0 sources, done in RES.sys:smgr)
; <1.3> 12/1/88 PKE MED fixed divide by zero in FixSpExtra.
; <1.2> 11/14/88 PKE Synchronize EASE and Projector
; <1.1> 11/11/88 CCH Fixed Header.
; <1.0> 11/9/88 CCH Adding to EASE.
; (old EASE ROMproj history below)
; <1.6> 10/27/88 LDC Mods by Carl Hewitt and Brian McGhie in the process of putting
; Script Manager in ROM
; (EASE Sysproj history below)
; <1.2> 2/14/89 PKE Updated to use MPW 3.0 final ScriptEqu.a equate names
; <1.1> 1/16/89 CCH Merged 6.0.3 final sources into 7.0.
; <1.0> 11/16/88 CCH Added to EASE.
; (pre-EASE history below)
; 4/26/89 pke Export romanTable<6C>
; 2/21/89 pke For ROM and all systems, get CharType/Transliterate/FindWord
; tables from itl2, not itlR or code. Include MED's FixSpExtra fix
; in Sys $700 as well as ROM (it was previously left out of Sys
; $700 for testing source merge). Also change conditionals so that
; if we don't do the new itl2 stuff, we will get the FindWord
; tables from itlR in Sys $700 as well as in the ROM version. Use
; include 'inc.sum.a' (not inc.sum.src.a), not load 'inc.sum.d'.
; 2/2/89 pke Merged system sources and ROM sources
; 11/7/88 med Fixed FixSpExtra divide by zero.
; 10/18/88 ldc Moved word wrap and break tables to itlr.a
; 10/12/88 ldc Removed check for old roms, use inc.sum.src.a
; 7/18/88 ldc Fixed word table to handle character extensions
; 6/15/88 ldc Moved tables for CharType and upper/lower casing to itlr.a.
; Added GetItlr routine to get pointer to itlr.a
; 6/7/88 ldc Added BRA's to StdUnlink and StdExit for romification
; changes above are for ROM or buildLevel >= 2
; 6/6/88 med fixed <20> bug
; 3/21/88 med Minor fix in PortionText intercharacter spacing.
; 3/21/88 med Moved VisibleLength in here
; 1/7/88 med Moved PortionText, FindScriptRun in
; 8/20/87 med Added <letter><number> to words
; 8/20/87 med Removed $a0 from list of blanks
; 8/2/87 med Fixed bug with non-breaking space in FindWord
; 7/31/87 med Fixed CR in middle of blanks in FindWord
; 7/24/87 med Changed CharType table so blank characters have smPunctBlank
; 6/8/87 med Fixed FixSpExtra: add small value to compensate for QD bug, make
; the spExtra value additive.
; 3/6/87 med Added smScriptFlags field and dispatch
; 12/28/86 jdt Removed bug in FixSpExtra where dbra count was trashed.
; 12/25/86 jdt Modified the FixSpExtra routine for performance. It now assumes
; that space characters will outnumber non-space characters, and
; checks for the case where slop is zero.
; 12/22/86 jdt Changed stack frames to include argument sizes. Moved several
; magic numbers into equates. Space improvements in RomanScript,
; CharType, Translit, FindWord, GetScript/SetScript, and
; HiliteText. Speed improvements in Pixel2Char. Added constant for
; last script verb.
; 12/8/86 jdt Modified the dispatch so the ParseTable call is not faked. Added
; Mark's speedup for dispatch (-smGetScript).
; 12/5/86 jdt Cleaned up stack frames and comments. Now use SpaceExtra trap in
; FixSpExtra.
; 11/20/86 jdt Replaced standard equates load.
; 11/16/86 KWK Added ParseTable routine.
; 10/24/86 jdt New ironsides dispatcher can fake falls for unimplemented
; selectors. Yanked extra storage argument from Pixel2Char.
; 10/23/86 jdt Added new storage argument to Pixel2Char.
; 10/7/86 JDT Error check after GetHandleSize should be a long test.
; 9/14/86 JDT Frenzied reorganization to cover up an embarassing assumption
; concerning spExtra. Don't believe anything you hear about it.
; 9/6/86 JDT New GetScript/SetScript interfaces. Added Font2Script stub.
; Installed smScriptMunged verb in table and incremented it in
; SetScript.
; 9/4/86 JDT Added nil FontScript, IntlScript, and KeyScript routines.
; 9/1/86 JDT Fixed bug in simple GetScript routine.
; 8/28/86 JDT Removed Roman KeyHook routine.
; 8/21/86 JDT Broke into script manager and roman utilities files.
;___________________________________________________________________________________________________
; To Do (old):
; Fix bug in Pixel2Char when checking for stack space.
; Speed improvements to FixSpExtra.
; Packing of character type and transliteration tables.
;___________________________________________________________________________________________________
load 'standardequ.d'
include 'ScriptPriv.a'
include 'IntlUtilsPriv.a' ; for IUGetScriptItl <13>
include 'Packages.a' ; To get _IUGetIntl <02/21/89 pke><08/26/89 pke>
import StdUnlink, StdExit ; <6/7/88ldc> for rom
proc
blanks on
string asis
import BitBucket ; <6/7/88ldc> for rom
export RomanPrint
export RomanName
export RomanScript
export rGetScript, rSetScript, CharByte ; <10>
export Translit, FindWord
export HiliteText
export VisibleLength ; <10>
; ----------------------------------------------------------------------------
; function: RomanPrint
; input: d0.l Printer GrafPort.
; d1.w Printer number.
; warning: This routine is register based.
; This routine preserves all registers.
;
; The print action routine for Roman does absolutely nothing, as you might
; expect.
; ----------------------------------------------------------------------------
RomanPrint
rts ; return to the caller.
RomanName
string Pascal
dc.b 'Roman'
align 2
string asis
; ----------------------------------------------------------------------------
; function: RomanScript
; input: (sp).l Routine selector, arguments length, result length.
; warning: This routine is a dispatcher and does not return directly.
; This routine follows Pascal register conventions.
;
; This is the ScriptUtil entry for the Roman Script. The entry uses a
; dispatch table to find the routine offset for this selector. If the
; call is not implemented, we remove the arguments, clear the result, and
; return directly.
;
; Now we assume that the ScriptRecord pointer is in A0 when this is called. <17>
; We will replace the selector on the stack with this value, so that routines
; have access to script-specific information (since they may be called for
; non-Roman scripts). Till now, no Roman routines have depended on having
; any particular value in the selector space.
; Note 1: starting in Bruges, some routines assumed that the script code was in
; the high word of d2; changing to depend on having a ScriptRecord pointer in
; A0 makes an easier interface when Roman routines are called directly by the
; one-byte extension. In both cases, we hope that RomanScript is only called
; by the ScriptMgr or the one-byte extension.
; Note 2: We still want to use the Roman ScriptRecord for dispatching, NOT
; the ScriptRecord whose pointer is in A0.
; ----------------------------------------------------------------------------
RomanScript
with SMgrRecord,ScriptRecord
move.l 4(sp),d0 ; get selector
GetSMgrCore a1 ; set up ptr to SMgrRecord <17>
move.l smgrEntry+(smRoman*4)(a1),a1 ; now set up ptr to Roman ScriptRecord <17>
cmp.w scriptDispHigh(a1),d0 ; selector past max script sys call? <17>
bhi BitBucket ; clean up stack and fake the call <6/7/88ldc>
sub.w scriptDispLow(a1),d0 ; make word offset from table start <17>
add.w d0,d0 ; make a long offset
move.l scriptDispTable(a1),a1 ; get table ptr <17>
move.l 0(a1,d0.w),d0 ; get routine vector from table <15><17>
beq BitBucket ; if nil, bail <15>
move.l a0,4(sp) ; replace selector with ScriptRecord ptr <17>
move.l d0,a0 ; copy vector <15>
jmp (a0) ; now jump to it
endwith ;SMgrRecord,ScriptRecord
; ----------------------------------------------------------------------------
; function: GetScript(script, verb: Integer): LongInt;
; input: (sp).w Script code.
; (sp).w Verb value.
; (sp).l Param pointer.
; output: (sp).l Result, OSErr.
; warning: This routine follows Pascal register conventions.
;
; GetScript reads values from the script entry and returns them.
; ----------------------------------------------------------------------------
; now handled in ScriptUtil
rGetScript ; <10>
rSetScript ; <10>
;<6/7/88ldc> BitBucket removes the return address and selector
bra BitBucket ; clean stack and return
; ----------------------------------------------------------------------------
; function: CharByte(textBuf: Ptr; textOffset: Integer): Integer;
; input: (sp).l Text pointer.
; (sp).w Text offset.
; output: (sp).w Result, character type.
; warning: This routine follows Pascal register conventions.
;
; Return the single byte character result for all characters. Since RIS
; only supports single byte characters, this routine is trivial.
; ----------------------------------------------------------------------------
;<6/7/88ldc> cbArgs equ *-4 = only discount the size of the return, not the
; obsolete a6link
; Cleaned up the conditionalized structure <5>
cbRecord record {return},decr ; used to be {a6link}
result ds.w 1 ; result.
cbArgs equ *-4 ; size of arguments.
textBuf ds.l 1 ; text buffer pointer.
textOffset ds.w 1 ; text buffer offset.
scriptRecPtr ds.l 1 ; Scriptrecord ptr <5><17>
return ds.l 1 ; return address.
;;a6link ds.l 1 ; old a6 register.
;;cbLocals equ * ; size of local variables.
endr
CharByte
with cbRecord
move.w #0,result(sp) ; clear result (stack based!!!)
move.w #cbArgs,d0 ; args to clear
bra StdExit ; exit without unlink
endWith
; ----------------------------------------------------------------------------
; function: Translit(srcHandle,dstHandle: Handle;
; target: Integer; srcMask: Longint): OSErr;
; input: (sp).l Source handle.
; (sp).l Destination handle.
; (sp).w Target.
; (sp).l Source mask.
; output: (sp).w Result, OSErr.
; warning: This routine follows Pascal register conventions.
;
; Transliterate is used only to uppercase or lowercase text under RIS. If
; the target and source masks are legal, the destination handle is sized to
; match the source handle.
; ----------------------------------------------------------------------------
tlRecord record {a6link},decr
result ds.w 1 ; function result.
tlArgs equ *-8 ; size of arguments.
srcHandle ds.l 1 ; srcHandle.
dstHandle ds.l 1 ; dstHandle.
target ds.w 1 ; target.
srcMask ds.l 1 ; srcMask.
scriptRecPtr ds.l 1 ; ScriptRecord pointer <5><17>
return ds.l 1 ; return address.
a6link ds.l 1 ; old a6 register.
tlLocals equ * ; size of local variables.
endr
sourceOn equ $0003 ; source bits on.
modifierMask equ $C000 ; case modifiers
transRegs reg d3/a2-a4 ; save regs <03/13/89 pke><08/26/89 pke><10>
; Link the stack and save the registers.
; Note: d2 hi word has a value passed from dispatcher; save it till IUGetScriptItl call <14>
Translit
with tlRecord
link a6,#tlLocals ; link the stack.
movem.l transRegs,-(sp) ; save the registers.
; Assume the error result and check the target, modifiers, and source mask.
; If any of them is wrong, return immediately.
move.l #-1,d0 ; assume error result.
move.l srcMask(a6),d1 ; get the source mask.
and.w #sourceOn,d1 ; isolate ascii and native.
beq transDone ; transliteration not available. <02/21/89 pke><08/26/89 pke><10>
move.w target(a6),d1 ; get the target and modifiers.
move.w d1,d2 ; copy the target and modifiers.
sub.b #1,d1 ; if target not native or ascii,
bgt transDone ; transliteration not available. <02/21/89 pke><08/26/89 pke><10>
sub.b #-2-1,d1 ; check also for general target, -2,-1
blt transDone ; bail if not <02/21/89 pke><08/26/89 pke><10>
move.w #modifierMask,d3 ; now case modifiers
and.w d3,d2 ; remove the target.
cmp.w d3,d2 ; if both modifiers are on,
beq transDone ; transliteration not available. <02/21/89 pke><08/26/89 pke><10>
; Change the size of the destination handle to be the same as the source
; handle. If an error occurs, return immediately.
move.l srcHandle(a6),a1 ; get source handle.
move.l dstHandle(a6),a2 ; get destination handle.
move.l a1,a0 ; get source handle.
_GetHandleSize ; find out how large it is.
tst.l d0 ; if an error occurred,
blt transDone ; return the error code.
move.l d0,d1 ; save the length.
move.l a2,a0 ; get destination handle.
_SetHandleSize ; make it the same length.
tst.w d0 ; if an error occurred,
blt transDone ; return the error code.
; Convert the handles into pointers and determine which of the translation
; tables to use from the target modifiers. If the modifier is to upper
; case, use the upperCase table. If the modifier is to lower case, use
; the lowerCase table. If the modifiers specify neither upper nor lower
; case, so a block move from the source to the destination.
; <02/21/89 pke><08/26/89 pke><10>
movem.l a1/d1-d2,-(sp) ;*save around IUGetIntl <skip a0/d0, 06/05/89 pke>
; skip save/clear of IntlForce <13>
clr.l -(sp) ; space for returned handle
move.w #2,-(sp) ; select itl2
;; clr.w d2 ; sysFlag=0; script code in hi word <14>
;; swap d2 ; put where they belong <14>
move.l scriptRecPtr(a6),a0 ; ScriptRecord ptr (maybe nonRoman) <17>
moveq #0,d2 ; sysFlag=0 in hi word <17>
move.b ScriptRecord.scriptID(a0),d2 ; script code in low word <17>
move.l d2,-(sp) ; two arguments: script code, sysFlag=0 <13><14>
_IUGetScriptItl ; may trash a0,a1,d0-d2 <13>
move.l (sp)+,a4 ; store itl2 handle
; skip restore of IntlForce <13>
movem.l (sp)+,a1/d1-d2 ;*
; move following two dereferences here, after IUGetIntl <2.0> <08/20/89 pke>
move.l (a1),a1 ; get source pointer.
move.l (a2),a2 ; get destination pointer.
moveq #-1,d0 ; assume error result <06/05/89 pke>
move.l a4,d3 ; nil handle? <06/05/89 pke>
beq transDone ; bail if so <06/05/89 pke>
move.l (a4),a4 ; dereference
btst.b #0,itl2FlagsOffset+1(a4) ; extended itl2 tables?
beq.s transDone ; no, bail (special return code?)
clr.l d3 ; wordize <12/16/87med> <move here 06/05/89 pke>
move.l a4,a0 ; copy
clr.l d0 ; <move here 06/05/89 pke>
move.w classArrayOffset(a4),d0 ; longize
add.l d0,a0 ;
move.l a4,a3 ;
move.w upperListOffset(a4),d0 ;
add.l d0,a3 ;
clr.l d0 ; quick fix: do this in case we branch
cmp.w #smTransUpper,d2 ; if mask is transUpper,
beq.s @TransNext ; transliterate to upper case.
move.l a4, a3 ; start from itlr ptr <6/16/88ldc>
move.w lowerListOffset(a4),d0 ;
add.l d0,a3 ;
clr.l d0 ;
cmp.w #smTransLower,d2 ; if mask is transLower,
beq.s @TransNext ; transliterate to lower case.
move.l a1,a0 ; copy the source to the
move.l a2,a1 ; destination without changing
move.l d1,d0 ; the characters.
_BlockMove ;
bra.s transNoErr ; return error code.
@TransLoop
move.b (a1)+,d0 ; get the character.
move.b 0(a0,d0.w),d3 ; get class <12/16/87med>
add.b 0(a3,d3.w),d0 ; delta <12/16/87med>
move.b d0,(a2)+ ; get the transliteration. <12/16/87med>
@TransNext
dbra d1,@TransLoop ; do the next character.
; Return the noErr code.
transNoErr
move.l #noErr,d0 ; return noErr.
; We're all through translating. Store the result code, clean up the
; stack and return to the caller.
transDone
move.w d0,result(a6) ; store the result.
movem.l (sp)+,transRegs ; restore the registers.
; Unlink the stack and return to the caller.
move.w #tlArgs,d0 ; for std exit
bra StdUnlink ; StdUnlink
endwith
; ----------------------------------------------------------------------------
; function: FindWord(textPtr: Ptr; textLength, offset: Integer;
; leftSide: Boolean; breaks: BreakTable;
; Var offsets: OffsetTable);
; input: (sp).l Text pointer.
; (sp).w Text length.
; (sp).w Text offset.
; (sp).w LeftSide flag.
; (sp).l Table of types and tuples.
; (sp).l Table of offsets.
; warning: This routine follows Pascal register conventions.
;
; Mark decided what he wants to do with this routine, and it is impressive.
; The basic idea is that we are passed a text selection (pointer, length,
; offset, and leftSide flag) and are to find the word selected.
; We return the offsets that mark the endpoints of the word. The return
; offsets are given in an offset table.
; The break table pointer allows the user to override the standard table
; used by the routine. If this parameter is 0, the standard table is used.
; If it is -1, a second table is used for word-wrap type selections. Any
; other value is interpreted as a pointer to new table, which is then used
; by the routine. This table has a specific format, as detailed below.
; ----------------------------------------------------------------------------
fwRecord record {a6link},decr
fwArgs equ *-8 ; size of arguments.
pointer ds.l 1 ; Text pointer.
length ds.w 1 ; Text length.
offset ds.w 1 ; First offset.
left ds.w 1 ; LeftSide flag.
option ds.l 1 ; Optional tuple table.
table ds.l 1 ; array of offsets.
scriptRecPtr ds.l 1 ; ScriptRecord pointer <5><17>
return ds.l 1 ; return address.
a6link ds.l 1 ; old a6 register.
fwLocals equ * ; size of local variables.
endr
tupleOffset equ 256 ; breakTable offset to tuples.
; Link the stack and save the registers.
;
; register usage:
; d3.w Left offset.
; d4.w Center offset.
; d5.w Right offset.
; d6.w Current tuple under consideration.
; d7.w Text length.
; a0.l Tuple table copy.
; a1.l Type table pointer.
; a2.l Block record pointer.
; a3.l Text pointer.
; a4.l Tuple table pointer.
; Note: d2 hi word has a value passed from dispatcher; save it till IUGetScriptItl call <14>
FindWord
with fwRecord
link a6,#fwLocals ; link the stack.
movem.l d3-d7/a2-a4,-(sp) ; save the registers.
; Load the registers with the basic parameters.
move.l table(a6),a2 ; get offset array.
move.l pointer(a6),a3 ; get text pointer.
move.w offset(a6),d4 ; get first offset.
move.w length(a6),d7 ; get text length.
; Find the word that has the offset in it and return its limits. First,
; determine the starting offset based on the text offset, length, and
; leftSide flag.
tst.b left(a6) ; if leftSide is false,
bne.s @1 ; subtract one from
sub.w #1,d4 ; the offset.
@1 move.l #0,d3 ; left is zero.
move.l d3,d5 ; right is zero.
tst.w d4 ; if offset < 0,
blt storeOffsets ; return to caller.
move.l d7,d3 ; left is length.
move.l d7,d5 ; right is length.
cmp.w d7,d4 ; if offset >= length,
bge storeOffsets ; return to caller.
; Next, prime all of the registers for the search in both directions. We
; determine here which god-forsaken table the user wants.
FoundOffset
MOVE.L option(A6),D0 ; check for 0 <16>
BEQ.S @UseDefault ; if default word select table, go get it <16>
CMP.L #-1,D0 ; check for -1 <16>
BEQ.S @UseDefault ; if default word wrap table, go get it <16>
MOVE.L D0,A1 ; have pointer to custom table <16>
BRA.S @LoadOffsets ; continue with it <16>
@UseDefault
;; clr.w d2 ; sysFlag=0; script code in hi word <14>
;; swap d2 ; put where they belong <14>
move.l scriptRecPtr(a6),a0 ; ScriptRecord ptr (maybe nonRoman) <17>
moveq #0,d2 ; sysFlag=0 in hi word <17>
move.b ScriptRecord.scriptID(a0),d2 ; script code in low word <17>
clr.l -(sp) ; space for returned handle
move.w #2,-(sp) ; select itl2
move.l d2,-(sp) ; two arguments: script code, sysFlag=0 <13><14>
_IUGetScriptItl ; may trash a0,a1,d0-d2 <13>
move.l (sp)+,a0 ; store itl2 handle
move.l a0,d0 ; nil handle?
beq.s storeOffsets ; bail if so
move.l (a0),a0 ; dereference
btst.b #0,itl2FlagsOffset+1(a0) ; extended itl2 tables?
beq.s storeOffsets ; no, bail (what should we return?)
move.l a0,a1 ; copy
clr.l d0 ; for longizing
move.w wordTableOffset(a0),d0 ; longize
add.l d0,a1 ; get offset
move.l option(a6),d0 ; optional table = 0?
beq.s @LoadOffsets ; yes -> use standard table.
move.l a0,a1 ; copy again
clr.l d0 ; clear again for longizing
move.w wrapTableOffset(a0),d0 ; longize
add.l d0,a1 ;
; we now check for breaks <20> 0 or -1 above, <16>
; don't need to do it here anymore
@LoadOffsets
lea tupleOffset(a1),a4 ; tuples follow char types.
move.w d4,d3 ; start left at center.
move.w d4,d5 ; start right at center - 2.
sub.w #2,d5 ;
; First, check the center tuple to see if we have a word at all. Second,
; search to the right until we come to the end of a word. Third, search
; to the left until we come to the beginning of a word.
FindOffsets
clr.l d6 ; clear the tuple.
bsr.s FindRight ; get left character.
bsr.s FindRight ; get center character.
bsr.s FindRight ; get right character.
bsr.s TupleCenter ; legal center tuple?
bne.s StoreOffsets ; no -> return center.
move.w d6,-(sp) ; save center tuple.
@1 bsr.s FindRight ; get the next character.
bsr.s TupleRight ; if the tuple is good,
beq.s @1 ; continue to the right.
move.w (sp)+,d6 ; fetch center tuple.
sub.w #1,d3 ; left is center - 1.
@2 bsr.s FindLeft ; get the next character.
bsr.s TupleLeft ; if the tuple is good,
beq.s @2 ; continue on the left.
; Adjust the offsets to return the correct string. The right is one past
; its break, and the left is two before its break.
sub.w #1,d5 ; bring right back one.
add.w #2,d3 ; bring left forward two.
; Save the offsets in the offset table. Be sure to clear the two extra
; offset pairs. Restore the registers and return to the caller.
StoreOffsets
move.w d3,(a2)+ ; store the left offset.
move.w d5,(a2)+ ; store the right offset.
clr.l (a2)+ ; clear the second pair.
clr.l (a2) ; clear the third pair.
movem.l (sp)+,d3-d7/a2-a4 ; restore the registers.
; Unlink the stack and return to the caller.
move.w #fwArgs,d0 ; for std exit
bra StdUnlink ; StdUnlink
; The following routines are used by the FindWord routine to build and
; categorize the character tuples.
highMask equ $7fff ; mask off high bit.
rightMask equ $ffe0 ; clear right character.
leftMask equ $03ff ; clear left character.
bothMask equ $03e0 ; clear right and left.
nonBreak equ $0020 ; non-breaking center.
; ----------------------------------------------------------------------------
; Increment the right offset and get the next character. Shift its type
; into the current tuple on the right side.
; Note that a right offset which is less than zero or greater than the
; length shifts a wildcard character into the tuple.
FindRight
move.l #0,d0 ; type is wildcard.
add.w #1,d5 ; offset < 0?
blt.s @0 ; yes -> enter a wildcard.
cmp.w d7,d5 ; offset >= length?
bge.s @0 ; yes -> enter a invalid.
move.b 0(a3,d5.w),d0 ; get the character.
move.b 0(a1,d0.w),d0 ; get the character type.
@0 lsl.w #5,d6 ; shift the tuple left.
and.w #highMask,d6 ; clear high bit.
or.b d0,d6 ; or in the character.
rts ; return to the caller.
; Decrement the left offset and get the next character. Shift its type
; into the current tuple on the left side.
; Note that a left offset which is less than zero or greater than the
; length shifts a wildcard character into the tuple.
FindLeft
move.l #0,d0 ; type is wildcard.
sub.w #1,d3 ; left offset < 0?
blt.s @0 ; yes -> enter a wildcard.
cmp.w d7,d3 ; left offset >= length?
bge.s @0 ; yes -> enter a wildcard.
move.b 0(a3,d3.w),d0 ; get the character.
move.b 0(a1,d0),d0 ; get the character type.
@0 and.w #rightMask,d6 ; clear the bottom five bits.
add.w d6,d6 ; place a zero at bit 5.
or.w d0,d6 ; insert new type.
ror.w #6,d6 ; rotate right 6 bits.
rts ; return to the caller.
; ----------------------------------------------------------------------------
; Determine whether a tuple exists or not in the tuple table. The current
; tuple is in d6, and registers d0-d2 and a0 are free for our use. We
; return 'eq' in the cc's if the tuple was found, 'ne' otherwise.
rightAlone equ $001F ; right character
leftAlone equ $7C00 ; left character
rightNB equ $0001 ; non-breaking on right
leftNB equ $0400 ; ditto on left
TupleCenter
bsr.s TupleRight ; try right side <8/2/87med>
beq.s VanillaReturn ; done? <8/2/87med>
move.w d6,d1 ; copy the tuple.
bra.s CommonLeft ; join into left
TupleRight
move.w d6,d1 ; copy the tuple.
bsr.s TupleExacting ; legal tuple?
beq.s VanillaReturn ; yes -> accept immediatly.
andi.w #rightMask,d1 ; right character is wild.
bsr.s TupleExacting ; legal tuple?
beq.s VanillaReturn ; yes -> accept <8/2/87med>
and.w #leftAlone,d1 ; get left char <8/2/87med>
cmp.w #leftNB,d1 ; = non-break? <8/2/87med>
bra.s TestCenter ; check center=wild
TupleLeft
move.w d6,d1 ; copy the tuple.
bsr.s TupleExacting ; legal tuple?
beq.s VanillaReturn ; yes -> accept immediatly.
CommonLeft
andi.w #leftMask,d1 ; left character is wild.
bsr.s TupleExacting ; legal tuple?
beq.s VanillaReturn ; yes -> return immediately. <8/2/87med>
and.w #rightAlone,d1 ; get left char <8/2/87med>
cmp.w #rightNB,d1 ; = non-break? <8/2/87med>
TestCenter
bne.s NonBreaking ; not R or L break, skip center test
move.w d6,d1 ; refresh tuple <8/2/87med>
and.w #bothMask,d1 ; wild center? <8/2/87med>
seq d1 ; reverse CCR <8/2/87med>
tst.b d1 ; cause EQ = center <20> 0 <8/2/87med>
rts ; return to the caller. <8/2/87med>
NonBreaking
move.w d6,d1 ; refresh tuple <8/2/87med>
andi.w #bothMask,d1 ; non-breaking?
cmp.w #nonBreak,d1 ; yes -> accept.
VanillaReturn ; branched Return <8/2/87med>
rts ; return to the caller.
; ----------------------------------------------------------------------------
TupleExacting
move.l a4,a0 ; copy tuple table address.
move.w (a0)+,d0 ; get tuple table length.
@1 cmp.w (a0)+,d1 ; if this is the tuple,
dbeq d0,@1 ; exit the loop.
rts ; return to caller.
endwith
; ----------------------------------------------------------------------------
; function: HiliteText(textPtr: Ptr; textLength, firstOffset,
; secondOffset: Integer; Var offsets: OffsetTable);
; input: (sp).l Text pointer.
; (sp).w Text length.
; (sp).w First offset.
; (sp).w Second offset.
; (sp).l Table of offsets].
; warning: This routine follows Pascal register conventions.
;
; Given two offsets into a text string, this routine returns the part of
; the string that is to be highlighted. For RIS, this is just the original
; offsets.
; ----------------------------------------------------------------------------
htRecord record {a6link},decr
htArgs equ *-8 ; size of arguments.
pointer ds.l 1 ; Text pointer.
length ds.w 1 ; Text length.
first ds.w 1 ; First offset.
second ds.w 1 ; Second offset.
table ds.l 1 ; array of offsets.
scriptRecPtr ds.l 1 ; ScriptRecord pointer <5><17>
return ds.l 1 ; return address.
a6link ds.l 1 ; old a6 register.
htLocals equ * ; size of local variables.
endr
HiliteText
with htRecord
link a6,#htLocals ; link the stack.
; Store the default values into the offset table. The first pair is
; the first and second offsets pinned between 0 and the length of the
; string. Note that the following relationship should hold true:
;
; 0 <= firstOffset <= secondOffset <= length
move.l table(a6),a0 ; load table pointer.
move.w length(a6),d1 ; load length.
move.w first(a6),d0 ; load first offset.
bsr.s Normalize ; 0 <= offset <= length.
move.w second(a6),d0 ; load second offset.
bsr.s Normalize ; 0 <= offset <= length.
move.l #0,(a0)+ ; clear second pair.
move.l #0,(a0)+ ; clear third pair.
; Unlink the stack and return to the caller.
move.w #htArgs,d0 ; for std exit
bra StdUnlink ; StdUnlink
; Force the offset to be between 0 and the length of the text.
Normalize
bge.s @1 ; >0 -> skip this.
move.l #0,d0 ; set it to zero.
@1 cmp.w d1,d0 ; offset <= length?
ble.s @2 ; yes -> skip this.
move.w d1,d0 ; set it to length.
@2 move.w d0,(a0)+ ; store normal offset.
rts ; return to the caller.
endWith
;____________________________________________________________
; PROCEDURE VisibleLength (
; textPtr : Ptr;
; textLen : Longint
; ): Longint;
;____________________________________________________________
VisibleLengthFrame record {oldA6},decrement
resultSize equ 4
result ds.l 1
argSize equ *-8
textPtr ds.l 1
textLen ds.l 1
scriptRecPtr ds.l 1 ; ScriptRecord pointer <5><17>
return ds.l 1
oldA6 ds.l 1
localFrame equ *
endR
VisibleLength ; <10>
with VisibleLengthFrame
link a6,#localFrame
; init
move.l textPtr(a6),a0 ; ptr to text
move.l a0,d2 ; save for comparison
move.l textLen(a6),d0 ; len
ble.s @StripDone0 ; exit <05/30/89 pke><3><10>
add.l d0,a0 ; get to end
@StripLoop
move.b -(a0),d1 ; get character
beq.s @StripContinue ; null?: continue
cmp.b #32,d1 ; space?
bhi.s @StripDone ; no, and cant be white
beq.s @StripContinue ; white, keep looping
cmp.b #$0D,d1 ; CR?
beq.s @StripContinue ; white, keep looping
cmp.b #$09,d1 ; HT?
bne.s @StripDone ; no, and cant be white
@StripContinue
cmp.w a0,d2 ; at start?
bne.s @StripLoop ; no, continue
clr.l d2 ; no visible text
bra.s @StripExit ; finished
@StripDone
addq.l #1,a0 ; retract one
@StripDone0
sub.l a0,d2 ; subtract current position
neg.l d2 ; fix sign
@StripExit
move.l d2,result(a6) ; return result
CheckA6
; Unlink the stack and return to the caller.
move.w #argSize,d0 ; for std exit
bra StdUnlink ; StdUnlink
endProc
;____________________________________________________________
end
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