A2osX/SYS/KERNEL.S.FIO.txt

PR#3
PREFIX /A2OSX.SRC
NEW
INC 1
AUTO 6
				.LIST OFF
*--------------------------------------
* K.FileSearch
*  in :
*   PULLW = PSTR to File Name (PSTRING)		
*   PULLW = PSTR to Search Path (PSTRING) %LIB%;/SYS/SLIB
*  out :
*   Y,A = PSTR to FilePath (PSTRING)
*   X = hMem to FilePath
*--------------------------------------
K.FileSearch	>PULLW ZPQuickPtr4			ZPQuickPtr1 trashed by ExpandPStrYA
				>PULLYA						Get Search list
				>SYSCALL SYS.ExpandPStrYA	Expand it	(SYSCALL to BNK1)
*				bcs .99
				bcc .10
				rts

.98				lda K.FileSearch.hSrch		Discard Expanded hSrch list
				jsr K.FreeMemA
				lda #SYSMGR.ERRFNF
				sec
				rts
				
.10				stx K.FileSearch.hSrch
				>STYA ZPQuickPtr3		ZPQuickPtr2 trashed by K.STAT !!! expanded search list ;
				
				stz K.FileSearch.Index
			
.1				stz KrnBuf256		reset String
				ldx #0
				
				ldy K.FileSearch.Index
				
.2				tya
				cmp (ZPQuickPtr3)		end of src string ?
				beq .3					end of string, try it....
				iny
				lda (ZPQuickPtr3),y
				cmp #';'
				beq .31
				inx
				sta KrnBuf256,x
				bra .2
				
.31				iny							skip ';' for next try
.3				txa
				beq .98						String is empty....nothing to try

				sty K.FileSearch.Index		save current index
				
				ldy #0
				
.4				iny
				lda (ZPQuickPtr4),y			Append Fiename...
				inx
				sta KrnBuf256,x
				tya
				cmp (ZPQuickPtr4)
				bne .4
				
				stx KrnBuf256				set string length
				
				lda #'!'
				>SYSCALL SYS.COutA
				>LDYAI KrnBuf256
				>SYSCALL SYS.PSTROutYA
				>DEBUG

				>PUSHWI	KrnSTAT
				>PUSHWI KrnBuf256
				jsr K.STAT
				bcs .1						Failed...retry next path...
				
				lda K.FileSearch.hSrch		Discard Expanded hSrch list
				jsr K.FreeMemA
				lda #'@'
				>SYSCALL SYS.COutA
				>LDYAI KrnBuf256
				>SYSCALL SYS.PSTROutYA
				>DEBUG

				>LDYAI KrnBuf256
				>SYSCALL SYS.NewPStrYA
.99				rts
*--------------------------------------
K.FileSearch.hSrch	.BS 1
K.FileSearch.Index	.BS 1
*--------------------------------------
* K.GetFullPathYA
*  in :
*   Y,A = Filename (PSTRING)
* out :
*   Y,A = FullPath (PSTRING)
*   X = hMem of FullPath
*--------------------------------------
K.GetFullPathYA	>STYA ZPQuickPtr3		Ptr1 & 2 used by StrCpy
				lda (ZPQuickPtr3)
				beq .9

				stz KrnBuf256
				
				ldy #1
				lda (ZPQuickPtr3),y
				cmp #'/'				full path starting with '/'?
				beq .1					yes, do not append to current prefix
				
				ldy #S.PS.hPREFIX
				lda (pPs),y
				jsr K.GetMemPtrA
				>PUSHYA
				>PUSHWI KrnBuf256
				>SYSCALL SYS.PStrCpy
				
.1				>PUSHW ZPQuickPtr3
				>PUSHWI KrnBuf256
				>SYSCALL SYS.PStrCat

				>LDYAI KrnBuf256
				>SYSCALL SYS.NewPStrYA
				rts
				
.9				sec
				rts
*--------------------------------------
* K.LoadFile
*  in :
*   PULLW = PATH (Handled by....
*   PULLB = MODE  ...
*   PULLB = TYPE  ...
*   PULLW = AUXTYPE ...FOPEN)
* out :
*   Y,A = File Length
*   X = hMem of Loaded File
*--------------------------------------
K.LoadFile		jsr K.FOPEN
				bcs .9

				sta K.LoadFile.hFile
				
				ldx #SYS.FSEEK.END
				jsr K.LoadFile.Seek
				bcs .99
				
				lda K.LoadFile.hFile
				jsr K.FTELLA
				bcs .99
				>STYA K.LoadFile.Len
				phx
				plx
				bne .98					LEN > 65535 !!???
				
				>PUSHYA					push len
				>PUSHBI 0
				jsr K.GetMem
				bcs .99
				>STYA K.LoadFile.Mem
				stx K.LoadFile.hMem
				
				ldx #SYS.FSEEK.SET
				jsr K.LoadFile.Seek
				bcs .97
				
				>PUSHW K.LoadFile.Mem
				>PUSHW K.LoadFile.Len
				>PUSHB K.LoadFile.hFile
				jsr K.FREAD
				bcs .97
				
				jsr .99
				
				>LDYA K.LoadFile.Len
				ldx K.LoadFile.hMem
				clc
.9				rts

.97				pha
				lda K.LoadFile.hMem
				jsr K.FreeMemA
				pla
				.HS 2C
				
.98				lda #SYSMGR.ERRFTB

.99				pha
				lda K.LoadFile.hFile
				jsr K.FCLOSEA
				pla
				sec
				rts
*--------------------------------------
K.LoadFile.Seek	>PUSHWI 0
				>PUSHWI 0
				txa
				>PUSHA
				>PUSHB K.LoadFile.hFile
				jmp K.FSEEK
*--------------------------------------
*  PULLW = SrcPtr
*  PULLW = SrcLen
*  PULLW = PATH (Handled by....
*  PULLB = MODE  ...
*  PULLB = TYPE  ...
*  PULLW = AUXTYPE ...FOPEN)
*--------------------------------------
K.SaveFile		>PULLW K.LoadFile.Mem
				>PULLW K.LoadFile.Len
				
				jsr K.FOPEN
				bcs .9

				sta K.LoadFile.hFile
				
				>PUSHW K.LoadFile.Mem
				
				>PUSHW K.LoadFile.Len
				
				>PUSHB K.LoadFile.hFile
				jsr K.FWRITE
				bcs .99
				
				jsr .99
				clc
				rts
				
.99				pha
				lda K.LoadFile.hFile
				jsr K.FCLOSEA
				pla
				sec
				
.9				rts
*--------------------------------------
K.LoadFile.hFile	.BS 1
K.LoadFile.hMem	.BS 1
K.LoadFile.Mem	.BS 2
K.LoadFile.Len	.BS 2
*--------------------------------------
MAN
SAVE SYS/KERNEL.S.FIO
LOAD SYS/KERNEL.S
ASM