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|
PAGE ,132 ;AN000;
TITLE DOS - GRAPHICS Command - Profile Load Modules ;AN000;
;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; DOS - GRAPHICS Command
;; (C) Copyright 1988 Microsoft
;; ;AN000;
;; File Name: GRLOAD.ASM ;AN000;
;; ---------- ;AN000;
;; ;AN000;
;; Description: ;AN000;
;; ------------ ;AN000;
;; This file contains the modules used to load the ;AN000;
;; GRAPHICS profile into resident memory. ;AN000;
;; ;AN000;
;; ************* The EGA Dynamic Save Area will be built (by ;AN000;
;; ** NOTE ** CHAIN_INTERRUPTS in file GRINST.ASM) over top of these ;AN000;
;; ************* modules to avoid having to relocate this save just before ;AN000;
;; terminating. This is safe since the maximum memory used is ;AN000;
;; 288 bytes and the profile loading modules are MUCH larger than ;AN000;
;; this. So GRLOAD.ASM MUST be linked before GRINST.ASM and after ;AN000;
;; GRPRINT.ASM. ;AN000;
;; ;AN000;
;; ;AN000;
;; Documentation Reference: ;AN000;
;; ------------------------ ;AN000;
;; PLACID Functional Specifications ;AN000;
;; OASIS High Level Design ;AN000;
;; OASIS GRAPHICS I1 Overview ;AN000;
;; ;AN000;
;; Procedures Contained in This File: ;AN000;
;; ---------------------------------- ;AN000;
;; LOAD_PROFILE - Main module for profile loading ;AN000;
;; ;AN000;
;; Include Files Required: ;AN000;
;; ----------------------- ;AN000;
;; ?????????? - Externals for profile loading modules ;AN000;
;; ;AN000;
;; External Procedure References: ;AN000;
;; ------------------------------ ;AN000;
;; None ;AN000;
;; ;AN000;
;; Linkage Instructions: ;AN000;
;; --------------------- ;AN000;
;; Refer to GRAPHICS.ASM ;AN000;
;; ;AN000;
;; Change History: ;AN000;
;; --------------- ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; ;AN000;
CODE SEGMENT PUBLIC 'CODE' BYTE ;; ;AN000;
;; ;AN000;
INCLUDE STRUC.INC ;; ;AN000;
INCLUDE GRINST.EXT ;; Bring in external declarations ;AN000;
;; for transient command processing ;AN000;
INCLUDE GRSHAR.STR ;; ;AN000;
INCLUDE GRPARSE.EXT ;; ;AN000;
INCLUDE GRLOAD2.EXT ;; ;AN000;
INCLUDE GRLOAD3.EXT ;; ;AN000;
INCLUDE GRMSG.EQU ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Public Symbols ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
PUBLIC LOAD_PROFILE ;AN000;
PUBLIC GROW_SHARED_DATA ;AN000;
PUBLIC BLOCK_START ;AN000;
PUBLIC BLOCK_END ;AN000;
PUBLIC FIRST_BLOCK ;AN000;
PUBLIC MAX_BLOCK_END ;AN000;
PUBLIC GROUPS_DONE ;AN000;
PUBLIC STMTS_DONE ;AN000;
PUBLIC STMTS_DONE ;AN000;
PUBLIC PTD_FOUND ;AN000;
PUBLIC BUILD_STATE ;AN000;
PUBLIC STMT_ERROR ;AN000;
PUBLIC FILE_ERROR ;AN000;
PUBLIC PARSE_ERROR ;AN000;
PUBLIC END_OF_FILE ;AN000;
PUBLIC MEM_OVERFLOW ;AN000;
PUBLIC STMT_BUFFER ;AN000;
PUBLIC CUR_STMT ;AN000;
PUBLIC PREV_STMT ;AN000;
PUBLIC PRT_BOX_ERROR ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
ASSUME CS:CODE,DS:CODE ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Profile Load Variables ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
NO EQU 0 ;; ;AN000;
YES EQU 1 ;; ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; LOAD_PROFILE ;AN000;
;; ;AN000;
;; Input Parameters: ;AN000;
;; DS,ES,SS - points to our transient segment ;AN000;
;; ;AN000;
;; Output Parameters: ;AN000;
;; Temporary Shared Data Area ;AN000;
;; Carry flag set if errors in profile. ;AN000;
;; ;AN000;
;; Data Structures Referenced: ;AN000;
;; Shared Data Area ;AN000;
;; Profile Load Variables ;AN000;
;; ;AN000;
;; Description: ;AN000;
;; Build the profile information in the Temporary Shared Data Area. ;AN000;
;; The information will be built for the printer type parsed off ;AN000;
;; the command line. ALL Printer Type Descriptions will be ;AN000;
;; parsed to issue error messages and determine the maximum ;AN000;
;; amount of resident memory required for initial load. ;AN000;
;; The Shared Data Area begins with a fixed length section ;AN000;
;; and then has several variable length sections. PROFILE_BUILD_PTR ;AN000;
;; is used to build the variable length sections by serving ;AN000;
;; as a running pointer to the sections as they are built. ;AN000;
;; ;AN000;
;; Register Usage: ;AN000;
;; BP - points to beginning of Temp Shared Data ;AN000;
;; ;AN000;
;; Called By: ;AN000;
;; GRAPHICS_INSTALL ;AN000;
;; ;AN000;
;; External Calls: ;AN000;
;; PARSE_PRINTER, PARSE_DISPLAYMODE, PARSE_SETUP, PARSE_RESTORE ;AN000;
;; PARSE_PRINTBOX, PARSE_GRAPHICS, PARSE_COLORSELECT, ;AN000;
;; PARSE_COLORPRINT, GET_STATEMENT ;AN000;
;; SYSPARSE ;AN000;
;; ;AN000;
;; Logic: ;AN000;
;; IF profile path not specified THEN ;AN000;
;; PROFILE_PATH := "GRAPHICS.PRO" /* Current directory */ ;AN000;
;; Open profile using PROFILE_PATH ;AN000;
;; IF error during open THEN ;AN000;
;; PROFILE_PATH := ARG(V0) with "GRAPHICS.COM" replaced ;AN000;
;; by "GRAPHICS.PRO" ;AN000;
;; Open profile using PROFILE_PATH ;AN000;
;; IF error during open THEN ;AN000;
;; Issue "Cannot find profile" msg ;AN000;
;; Set carry flag ;AN000;
;; RETURN ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; ELSE ;AN000;
;; Open profile using specified path ;AN000;
;; IF error during open THEN ;AN000;
;; Issue "Cannot find profile" msg ;AN000;
;; Set carry flag ;AN000;
;; RETURN ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; /* don't start building until we find our printer type*/ ;AN000;
;; PARSE_MODE := NOBUILD ;AN000;
;; MAX_BUILD_PTR := 0 ;AN000;
;; CALL GROW_SHARED_DATA(PROFILE-BUILD_PTR,size of FIXED PART ;AN000;
;; of Shared Data Area) ;AN000;
;; WHILE (not end of file) AND (no I/O error) DO ;AN000;
;; CALL GET_STATEMENT ;AN000;
;; IF I/O error THEN ;AN000;
;; Issue error message ;AN000;
;; ELSE ;AN000;
;; CALL SYSPARSE to parse the statement verb ;AN000;
;; IF verb found THEN ;AN000;
;; IF invalid verb THEN ;AN000;
;; Issue error message ;AN000;
;; PARSE_MODE := ERROR ;AN000;
;; ELSE ;AN000;
;; CASE statement verb ;AN000;
;; PRINTER: ;AN000;
;; CALL PARSE_PRINTER ;AN000;
;; DISPLAYMODE: ;AN000;
;; CALL PARSE_DISPLAYMODE ;AN000;
;; PRINTBOX: ;AN000;
;; CALL PARSE_PRINTBOX ;AN000;
;; SETUP: ;AN000;
;; CALL PARSE_SETUP ;AN000;
;; RESTORE: ;AN000;
;; CALL PARSE_RESTORE ;AN000;
;; GRAPHICS: ;AN000;
;; CALL PARSE_GRAPHICS ;AN000;
;; COLORPRINT: ;AN000;
;; CALL PARSE_COLORPRINT ;AN000;
;; COLORSELECT: ;AN000;
;; CALL PARSE_COLORSELECT ;AN000;
;; ENDCASE ;AN000;
;; IF error on statement THEN ;AN000;
;; IF OVERFLOW bit set in RETURN_CODE THEN ;AN000;
;; Issue "Insufficient memory" message ;AN000;
;; RETURN to caller ;AN000;
;; ELSE ;AN000;
;; IF MISSING bit set in RETURN_CODE THEN ;AN000;
;; Issue "required statement missing" message ;AN000;
;; ENDIF ;AN000;
;; IF INVALID bit set in RETURN_CODE THEN ;AN000;
;; Issue "statement invalid" message ;AN000;
;; ENDIF ;AN000;
;; IF SEQUENCE bit set in RETURN_CODE THEN ;AN000;
;; Issue "out of sequence" message ;AN000;
;; ENDIF ;AN000;
;; display the statement in error ;AN000;
;; ENDIF ;AN000;
;; PARSE_MODE := ERROR ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; ENDWHILE ;AN000;
;; ;AN000;
;; /* Check length of last PTD */ ;AN000;
;; IF PROFILE_BUILD_PTR > MAX_BUILD_PTR THEN ;AN000;
;; MAX_BUILD_PTR := PROFILE_BUILD_PTR ;AN000;
;; ENDIF ;AN000;
;; ;AN000;
;; /* Make sure all required statements were in previous */ ;AN000;
;; /* Printer Type Description */ ;AN000;
;; /* Must have completed PRINTER, DISPLAYMODE, PRINTBOX and */ ;AN000;
;; /* GRAPHICS statements */ ;AN000;
;; IF PRT+DISP+BOX+GR bits not all set in STMTS_DONE THEN ;AN000;
;; Issue "required statement missing" message ;AN000;
;; Display "END OF FILE." ;AN000;
;; ENDIF ;AN000;
;; ;AN000;
;; IF errors during build THEN ;AN000;
;; set carry flag ;AN000;
;; ELSE ;AN000;
;; SD_TOTAL_SIZE := MAX_BUILD_PTR - TEMP_SHARED_DATA_PTR ;AN000;
;; ENDIF ;AN000;
;; RETURN ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
FILE_NOT_FOUND EQU 2 ;; DOS Int21H error codes ;AN000;
PATH_NOT_FOUND EQU 3 ;; ;AN000;
;; ;AN000;
SUBLIST LABEL BYTE ;; Message substituion list for stmt # ;AN000;
DB 11 ;; sublist size ;AN000;
DB 0 ;; ;AN000;
DW STMT_NUM ;; \ Dword pointer to item ;AN000;
SUBLIST_SEG DW ? ;; / ;AN000;
DB 1 ;; Substitution # ;AN000;
;; Flag format a0sstttt ;; ;AN000;
DB 00100001B ;; Unsigned binary word - left align ;AN000;
;;;; DB 00000000B ;; charcater ;AN000;
DB 0 ;; max field width ;AN000;
DB 1 ;; min width width ;AN000;
DB ' ' ;; pad characeter ;AN000;
;; ;AN000;
STMT_NUM DW 0 ;; ;AN000;
;; ;AN000;
;; ;AN000;
FILE_ERROR DB 0 ;; Error opening or reading PROFILE ;AN000;
PARSE_ERROR DB 0 ;; Syntax errors in PROFILE ;AN000;
END_OF_FILE DB 0 ;; 1 if end of file ;AN000;
MEM_OVERFLOW DB 0 ;; 1 if insufficient memory ;AN000;
;; ;AN000;
STMT_ERROR DB 0 ;; Error flag for individual stmt errors ;AN000;
MISSING EQU 1 ;; Required statement missing ;AN000;
INVALID EQU 2 ;; Invalid statement format ;AN000;
SEQUENCE EQU 4 ;; Statement out of sequence ;AN000;
;; ;AN000;
DEFAULT_PATH DB "GRAPHICS.PRO",0 ;; ;AN000;
BUFFER DB 64 DUP("$") ;; ;AN000;
;; ;AN000;
HANDLE DW 0 ;; Profile handle ;AN000;
;; ;AN000;
BUILD_STATE DB 0 ;; 1 if we are currently building ;AN000;
;; data. 0 means syntax checking ;AN000;
;; only ;AN000;
;; ;AN000;
;; Keep track of whether this PTD ;AN000;
;; matches the type requested ;AN000;
PTD_FOUND DB 0 ;; Values are NO (0), YES (1) and ;AN000;
PROCESSED EQU 2 ;; PROCESSED (2) ;AN000;
;; ;AN000;
VERB DB 0 ;; PTR into VERB_JMP_TAB ;AN000;
;; ;AN000;
VERB_JMP_TAB LABEL WORD ;; ;AN000;
DW OFFSET PARSE_PRINTER ;; ;AN000;
DW OFFSET PARSE_DISPLAYMODE ;; ;AN000;
DW OFFSET PARSE_PRINTBOX ;; ;AN000;
DW OFFSET PARSE_SETUP ;; ;AN000;
DW OFFSET PARSE_RESTORE ;; ;AN000;
DW OFFSET PARSE_GRAPHICS ;; ;AN000;
DW OFFSET PARSE_COLORPRINT ;; ;AN000;
DW OFFSET PARSE_COLORSELECT ;; ;AN000;
DW OFFSET PARSE_DARKADJUST ;; ;AN000;
;; ;AN000;
STMTS_DONE DW 0 ;; ;AN000;
GROUPS_DONE DW 0 ;; ;AN000;
PREV_STMT DW 0 ;; ;AN000;
CUR_STMT DW 0 ;; ;AN000;
;; ;AN000;
PRT EQU 1 ;; Bit masks for STMTS_DONE and ;AN000;
DISP EQU 2 ;; GROUPS_DONE. There is one ;AN000;
BOX EQU 4 ;; bit for each statement except ;AN000;
GR EQU 8 ;; DARKADJUST ;AN000;
SET EQU 10H ;; ;AN000;
REST EQU 20H ;; ;AN000;
COLS EQU 40H ;; ;AN000;
COLP EQU 80H ;; ;AN000;
DARK EQU 100H ;; ;AN000;
;; ;AN000;
BLOCK_START DW ? ;; Extents of the variable size block ;AN000;
BLOCK_END DW ? ;; currently being built ;AN000;
;; These are relative to the ;AN000;
;; start of the Shared Data Area ;AN000;
;; so the area can be relocated ;AN000;
MAX_BLOCK_END DW 0 ;; End of largest PTD contained ;AN000;
;; in profile ;AN000;
FIRST_BLOCK DW ? ;; Pointer to first variable block ;AN000;
;; (end of fixed part) ;AN000;
PRT_BOX_ERROR DB 0 ;; ;AN000;
;; ;AN000;
LOAD_PROFILE PROC NEAR ;; ;AN000;
;; ;AN000;
PUSH CS ;; ;AN000;
POP SUBLIST_SEG ;; setup segment for message sublist ;AN000;
;; ;AN000;
CALL OPEN_FILE ;; ;AN000;
.IF <FILE_ERROR EQ YES> ;; Check for error during open ;AN000;
STC ;; ;AN000;
RET ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
MOV BP,TEMP_SHARED_DATA_PTR ;; BP points to START of Shared Data ;AN000;
MOV AX,SIZE SHARED_DATA_AREA_STR ;; size of fixed part of Shared Data ;AN000;
MOV BLOCK_END,0 ;; Initialize BLOCK_START,BLOCK_END ;AN000;
MOV [BP].DARKADJUST_VALUE,0 ;; Init some values in the fixed ;AN000;
MOV [BP].NUM_PRT_COLOR,0 ;; area ;AN000;
MOV [BP].COLORPRINT_PTR,-1 ;; ;AN000;
MOV [BP].NUM_PRT_BANDS,0 ;; ;AN000;
MOV [BP].COLORSELECT_PTR,-1 ;; ;AN000;
MOV [BP].PRINTER_TYPE,BLACK_WHITE ;; ;AN000;
CALL GROW_SHARED_DATA ;; to the first byte after the ;AN000;
;; fixed part of Shared Data ;AN000;
MOV AX,BLOCK_END ;; Variable size data will be built ;AN000;
MOV BLOCK_START,AX ;; starting at BLOCK_START ;AN000;
MOV FIRST_BLOCK,AX ;; Save start of variable data ;AN000;
;; ;AN000;
MOV SI,BUFFER_PTR ;; Set up SI for GET_BYTE ;AN000;
CALL GET_BYTE ;; Get first byte from file ;AN000;
MOV NEXT_BYTE,AL ;; and store it ;AN000;
MOV BUFFER_PTR,SI ;; Save SI for next GET_BYTE ;AN000;
.WHILE <END_OF_FILE EQ NO> AND ;; Keep parsing until end of file or ;AN000;
.WHILE <FILE_ERROR EQ NO> ;; file error occurs ;AN000;
MOV STMT_ERROR,0 ;; Clear parse error flags ;AN000;
CALL GET_STATEMENT ;; Get next profile statement ;AN000;
INC STMT_NUM ;; ;AN000;
.IF NC ;; Carry flag set if get unsuccessful ;AN000;
CALL PARSE_VERB ;; Index into verb jump table returned ;AN000;
;; in BX ;AN000;
.IF <AX EQ 0> THEN ;; AX=0 if there is a recognized ;AN000;
MOV AX,CUR_STMT ;; ;AN000;
MOV PREV_STMT,AX ;; Save last statement verb ;AN000;
CALL VERB_JMP_TAB[BX] ;; statement to parse ;AN000;
.ELSEIF <AX NE -1> THEN ;; ;AN000;
OR STMT_ERROR,INVALID ;; ;AN000;
MOV PARSE_ERROR,YES ;; ;AN000;
MOV BUILD_STATE,NO ;; ;AN000;
.ENDIF ;; ;AN000;
.IF <STMT_ERROR NE 0> ;; An error was detected ;AN000;
CALL SHOW_PARSE_ERROR ;; ;AN000;
MOV PARSE_ERROR,YES ;; ;AN000;
MOV STMT_ERROR,0 ;; ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
.ENDWHILE ;; ;AN000;
;; ;AN000;
.IF <BIT STMTS_DONE AND PRT> ;; Must have at least one PRINTER ;AN000;
CALL TERMINATE_DISPLAYMODE ;; Terminate the last PRINTER and ;AN000;
CALL TERMINATE_PRINTER ;; DISPLAYMODE sections ;AN000;
.ELSE ;; ;AN000;
OR STMT_ERROR,MISSING ;; ;AN000;
.ENDIF ;; ;AN000;
.IF <STMT_ERROR NE 0> ;; ;AN000;
CALL SHOW_PARSE_ERROR ;; Issue Profile syntax messages ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
;; ;AN000;
MOV AX,3E00H ;; Close the file ;AN000;
MOV BX,HANDLE ;; ;AN000;
INT 21H ;; ;AN000;
;; ;AN000;
.IF <PARSE_ERROR EQ YES> ;; ;AN000;
MOV AX,SYNTAX_ERRORS ;; Issue "Syntax errors found in ;AN000;
MOV CX,0 ;; profile" message. ;AN000;
CALL DISP_ERROR ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
.IF <PTD_FOUND EQ NO> ;; Did we find the requested printer ;AN000;
MOV AX,INVALID_PRT ;; type? If not issue error ;AN000;
MOV CX,0 ;; message. ;AN000;
CALL DISP_ERROR ;; ;AN000;
MOV PARSE_ERROR,YES ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
.IF <PARSE_ERROR EQ YES> OR ;; ;AN000;
.IF <PRT_BOX_ERROR EQ YES> OR ;; ;AN000;
.IF <FILE_ERROR EQ YES> ;; Set carry flag if profile load ;AN000;
STC ;; was unsuccessful ;AN000;
.ELSE ;; ;AN000;
.IF <MEM_OVERFLOW EQ YES> ;; Everthing else was OK BUT we ran ;AN000;
.IF <INSTALLED EQ YES> ;; out of memory!!! ;AN000;
MOV AX,NB_FREE_BYTES ;; ;AN000;
.IF <AX LT RESIDENT_SHARED_DATA_SIZE> ;AN000;
MOV AX,NO_MEMORY ;; We ran out of physical memory! ;AN000;
.ELSE ;; ;AN000;
MOV AX,UNABLE_RELOAD ;; Allocated shared data is too small ;AN000;
.ENDIF ;; ;AN000;
.ELSE ;; ;AN000;
MOV AX,NO_MEMORY ;; We ran out of physical memory ;AN000;
.ENDIF ;; ;AN000;
MOV CX,0 ;; ;AN000;
CALL DISP_ERROR ;; ;AN000;
STC ;; Indicate unsuccessful ;AN000;
.ELSE ;; ;AN000;
MOV AX,MAX_BLOCK_END ;; Extent of largest PRINTER section ;AN000;
MOV [BP].SD_TOTAL_SIZE,AX ;; we parsed. ;AN000;
CLC ;; SUCCESSFUL LOAD!!!! ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
RET ;; ;AN000;
;; ;AN000;
LOAD_PROFILE ENDP ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; SHOW_PARSE_ERROR ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
CARRAIGE_RET EQU 13 ;; ;AN000;
LINE_FEED EQU 10 ;; ;AN000;
;; ;AN000;
SHOW_PARSE_ERROR PROC ;; ;AN000;
;; ;AN000;
MOV ERROR_DEVICE,STDOUT ;; profile syntax messages to STDOUT ;AN000;
;; ;AN000;
.IF <BIT STMT_ERROR AND MISSING> ;AN000;
PUSH SI ;; ;AN000;
MOV AX,MISSING_STMT ;; ;AN000;
MOV CX,1 ;; ;AN000;
MOV SI,OFFSET SUBLIST ;; ;AN000;
CALL DISP_ERROR ;; ;AN000;
POP SI ;; ;AN000;
.ENDIF ;; ;AN000;
.IF <BIT STMT_ERROR AND INVALID> ;AN000;
PUSH SI ;; ;AN000;
MOV AX,INVALID_STMT ;; ;AN000;
MOV CX,1 ;AN000;
MOV SI,OFFSET SUBLIST ;; ;AN000;
CALL DISP_ERROR ;; ;AN000;
POP SI ;; ;AN000;
.ENDIF ;; ;AN000;
.IF <BIT STMT_ERROR AND SEQUENCE> ;AN000;
PUSH SI ;; ;AN000;
MOV AX,OUT_SEQ_STMT ;; ;AN000;
MOV CX,1 ;AN000;
MOV SI,OFFSET SUBLIST ;; ;AN000;
CALL DISP_ERROR ;; ;AN000;
POP SI ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
MOV DI,STMT_END_INDEX ;; ;AN000;
MOV STMT_BUFFER[DI],'$' ;; For display ;AN000;
MOV AH,9 ;; ;AN000;
MOV DX,OFFSET STMT_BUFFER ;AN000;
INT 21H ;; ;AN000;
MOV DL,CARRIAGE_RET ;; ;AN000;
MOV AH,2 ;; ;AN000;
INT 21H ;; ;AN000;
MOV DL,LINE_FEED ;; ;AN000;
MOV AH,2 ;; ;AN000;
INT 21H ;; ;AN000;
;; ;AN000;
MOV ERROR_DEVICE,STDERR ;; reset to STDERR ;AN000;
;; ;AN000;
RET ;; ;AN000;
;; ;AN000;
SHOW_PARSE_ERROR ENDP ;; ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; OPEN_FILE ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; ;AN000;
OPEN_FILE PROC NEAR ;; ;AN000;
;; ;AN000;
.IF <PROFILE_PATH NE 0> ;; If a path was specified then ;AN000;
MOV DX,OFFSET PROFILE_PATH ;; try and open it ;AN000;
MOV AX,3D00H ;; ;AN000;
INT 21H ;; Open it ;AN000;
.IF C ;; Open error if carry flag set ;AN000;
.IF <AX EQ FILE_NOT_FOUND> OR ;; Check for error other than ;AN000;
.IF <AX EQ PATH_NOT_FOUND> ;; file not found ;AN000;
MOV AX,PROFILE_NOT_FOUND ;; ;AN000;
MOV CX,0 ;; ;AN000;
CALL DISP_ERROR ;; Issue "File not found" common msg ;AN000;
MOV FILE_ERROR,YES ;; ;AN000;
.ELSE ;; ;AN000;
CALL FILE_ERROR_PROC ;; Issue "Open error" ;AN000;
.ENDIF ;; ;AN000;
.ELSE ;; ;AN000;
MOV HANDLE,AX ;; ;AN000;
.ENDIF ;; File opened OK ;AN000;
.ELSE ;; No path parameter ;AN000;
MOV DX,OFFSET DEFAULT_PATH ;; Try and open "GRAPHICS.PRO" ;AN000;
MOV AX,3D00H ;; ;AN000;
INT 21H ;; Open it ;AN000;
.IF C ;; Open error if carry flag set ;AN000;
.IF <AX EQ FILE_NOT_FOUND> OR ;; Check for file not found error ;AN000;
.IF <AX EQ PATH_NOT_FOUND> ;; ;AN000;
CALL COPY_ARGV0 ;; ;AN000;
MOV DX,OFFSET PROFILE_PATH ;; Try and open "GRAPHICS.PRO" in ;AN000;
MOV AX,3D00H ;; ARGV0 directory ;AN000;
INT 21H ;; ;AN000;
.IF C ;; Issue "File not found" common msg ;AN000;
.IF <AX EQ FILE_NOT_FOUND> OR ;AN000;
.IF <AX EQ PATH_NOT_FOUND> ;AN000;
MOV AX,PROFILE_NOT_FOUND ;; ;AN000;
MOV CX,0 ;; ;AN000;
CALL DISP_ERROR ;; Issue "File not found"common MSG;AN000;
MOV FILE_ERROR,YES ;; ;AN000;
.ELSE ;; ;AN000;
CALL FILE_ERROR_PROC ;; Issue "Open error" ;AN000;
.ENDIF ;; ;AN000;
.ELSE ;; ;AN000;
MOV HANDLE,AX ;; ;AN000;
.ENDIF ;; File opened OK ;AN000;
.ELSE ;; ;AN000;
CALL FILE_ERROR_PROC ;; Issue "Open error" ;AN000;
.ENDIF ;; ;AN000;
.ELSE ;; ;AN000;
MOV HANDLE,AX ;; ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
RET ;; ;AN000;
OPEN_FILE ENDP ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; COPY_ARGV0 ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; ;AN000;
COPY_ARGV0 PROC ;; ;AN000;
;; ;AN000;
PUSH ES ;; ;AN000;
PUSH DI ;; ;AN000;
PUSH SI ;; ;AN000;
;; ;AN000;
MOV DI,2CH ;; Locate environment string ;AN000;
MOV ES,[DI] ;; ;AN000;
XOR SI,SI ;; ;AN000;
.WHILE <<WORD PTR ES:[SI]> NE 0> ;; ;AN000;
INC SI ;; ;AN000;
.ENDWHILE ;; ;AN000;
ADD SI,4 ;; ;AN000;
LEA DI,PROFILE_PATH ;; Move string to work area ;AN000;
.REPEAT ;; ;AN000;
MOV AL,ES:[SI] ;; ;AN000;
MOV [DI],AL ;; ;AN000;
INC SI ;; ;AN000;
INC DI ;; ;AN000;
.UNTIL <<BYTE PTR ES:[SI]> EQ 0> ;; ;AN000;
MOV BYTE PTR [DI],0 ;; ;AN000;
MOV BYTE PTR [DI]-3,"P" ;; Change COM to PRO ;AN000;
MOV BYTE PTR [DI]-2,"R" ;; ;AN000;
MOV BYTE PTR [DI]-1,"O" ;; ;AN000;
;; ;AN000;
POP SI ;; ;AN000;
POP DI ;; ;AN000;
POP ES ;; ;AN000;
RET ;; ;AN000;
;; ;AN000;
COPY_ARGV0 ENDP ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; FILE_ERROR_PROC ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; ;AN000;
FILE_ERROR_PROC PROC ;; ;AN000;
MOV AX,FILE_ERRORS ;; ;AN000;
MOV CX,0 ;; ;AN000;
CALL DISP_ERROR ;; ;AN000;
MOV FILE_ERROR,YES ;; ;AN000;
RET ;; ;AN000;
FILE_ERROR_PROC ENDP ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; GET_STATEMENT ;AN000;
;; ;AN000;
;; Input Parameters: ;AN000;
;; NONE ;AN000;
;; ;AN000;
;; Output Parameters: ;AN000;
;; PROFILE_LINE ;AN000;
;; RETURN CODE : 0 - successfull read ;AN000;
;; : 1 - end of file ;AN000;
;; : 2 - error during read ;AN000;
;; ;AN000;
;; ;AN000;
;; Data Structures Referenced: ;AN000;
;; ;AN000;
;; Description: ;AN000;
;; Get a statement from the profile. ;AN000;
;; The file read in 512 byte buffers and parsed into ;AN000;
;; lines by the presence of a carriage return at the end of each line. ;AN000;
;; ;AN000;
;; Called By: ;AN000;
;; LOAD_PROFILE ;AN000;
;; ;AN000;
;; External Calls: ;AN000;
;; NONE ;AN000;
;; ;AN000;
;; Logic: ;AN000;
;; FOUND := FALSE ;AN000;
;; RETURN_CODE := 0 ;AN000;
;; WHILE NOT FOUND DO ;AN000;
;; IF end of buffer THEN ;AN000;
;; Read next profile record into buffer ;AN000;
;; IF successful read THEN ;AN000;
;; point to first byte in buffer ;AN000;
;; ELSE ;AN000;
;; IF end of file THEN ;AN000;
;; Close profile ;AN000;
;; RETURN_CODE := 1 ;AN000;
;; FOUND := TRUE ;AN000;
;; ELSE ;AN000;
;; RETURN_CODE := 2 ;AN000;
;; FOUND := TRUE ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; ENDIF ;AN000;
;; copy byte to PROFILE_LINE ;AN000;
;; IF byte in buffer is a CR THEN ;AN000;
;; FOUND := TRUE ;AN000;
;; ENDIF ;AN000;
;; ENDWHILE ;AN000;
;; RETURN ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
FOUND DB 0 ;; ;AN000;
;; ;AN000;
CARRIAGE_RET EQU 13 ;; ;AN000;
LINE_FEED EQU 10 ;; ;AN000;
NEXT_BYTE DB 0 ;; Save area for byte just read ;AN000;
BUFFER_SIZE EQU 512 ;; ;AN000;
FILE_BUFFER DB 512 DUP(0) ;; ;AN000;
BUFFER_PTR DW 512 ;; ;AN000;
BUFFER_END DW 512 ;; ;AN000;
STMT_BUFFER DB 255 DUP(0) ;; ;AN000;
DB ? ;; In case we have to insert a CR ;AN000;
DB ? ;; and a LF ;AN000;
DB ? ;; Too put the "$" for displaying the ;AN000;
;; line. ;AN000;
;; ;AN000;
STMT_END_INDEX DW ? ;; ;AN000;
MAX_STMT_LEN EQU 255 ;; ;AN000;
CR_FOUND DB 0 ;; 1 if we found a line terminator ;AN000;
;; ;AN000;
GET_STATEMENT PROC ;; ;AN000;
;; ;AN000;
MOV FOUND,NO ;; ;AN000;
MOV STMT_ERROR,0 ;; Clear error flags ;AN000;
XOR DI,DI ;; Index for extracted statement ;AN000;
MOV SI,BUFFER_PTR ;; Init file buffer ptr ;AN000;
;; ;AN000;
MOV AL,NEXT_BYTE ;; Restore current byte ;AN000;
MOV CR_FOUND,NO ;; ;AN000;
;; ;AN000;
;; ;AN000;
.WHILE <FOUND EQ NO> AND ;; Keep parsing until we find a stmt ;AN000;
.WHILE <FILE_ERROR EQ NO> AND ;; or a file error occurs ;AN000;
.WHILE <END_OF_FILE EQ NO> ;; or we reach end of file ;AN000;
.IF <CR_FOUND EQ YES> ;; ;AN000;
.IF <AL EQ LINE_FEED> ;; Return the line feed as well ;AN000;
.IF <DI NA MAX_STMT_LEN> ;; Truncate lines longer than MAX ;AN000;
MOV STMT_BUFFER[DI],AL ;; MOVE TO statement buffer ;AN000;
INC DI ;; Point to next byte in file buffr ;AN000;
.ELSE ;; ;AN000;
OR STMT_ERROR,INVALID ;; Line has been truncated > ERROR ;AN000;
MOV PARSE_ERROR,YES ;; ;AN000;
MOV BUILD_STATE,NO ;; ;AN000;
.ENDIF ;; ;AN000;
CALL GET_BYTE ;; Get the first byte of next statement ;AN000;
.ENDIF ;; ;AN000;
MOV FOUND,YES ;; Time to leave this WHILE ;AN000;
MOV NEXT_BYTE,AL ;; Save the byte we just read ;AN000;
.ELSE ;; ;AN000;
.IF <DI NA MAX_STMT_LEN> ;; Truncate lines longer than MAX ;AN000;
MOV STMT_BUFFER[DI],AL ;; move byte to statement buffer ;AN000;
INC DI ;; Point to next byte in file buffer ;AN000;
.ELSE ;; ;AN000;
OR STMT_ERROR,INVALID ;; Line has been truncated > ERROR ;AN000;
MOV PARSE_ERROR,YES ;; ;AN000;
MOV BUILD_STATE,NO ;; ;AN000;
.ENDIF ;; ;AN000;
.IF <AL EQ CARRIAGE_RET> ;; Found a line terminator ;AN000;
MOV CR_FOUND,YES ;; Indicate carriage return found ;AN000;
.ENDIF ;; and go through once more to ;AN000;
CALL GET_BYTE ;; check for a line feed ;AN000;
.ENDIF ;; ;AN000;
.ENDWHILE ;; ;AN000;
;; ;AN000;
.IF <STMT_BUFFER[DI-1] NE CARRIAGE_RET> AND ;; ;AN000;
.IF <STMT_BUFFER[DI-1] NE LINE_FEED> ;; ;AN000;
MOV STMT_BUFFER[DI],CARRIAGE_RET ;; ;AN000;
MOV STMT_BUFFER[DI+1],LINE_FEED ;; ;AN000;
INC DI ;; ;AN000;
INC DI ;; ;AN000;
.ENDIF ;; ;AN000;
MOV STMT_END_INDEX,DI ;; ;AN000;
MOV BUFFER_PTR,SI ;; Save buffer ptr for next time ;AN000;
;; ;AN000;
.IF <END_OF_FILE EQ YES> ;; ;AN000;
.IF <DI EQ 0> ;; Clear carry if we read something ;AN000;
STC ;; and no file error occured otherwise ;AN000;
.ELSE ;; set carry indicating unsuccessful ;AN000;
CLC ;; get. ;AN000;
.ENDIF ;; ;AN000;
.ELSE ;; ;AN000;
.IF <FILE_ERROR EQ YES> ;; ;AN000;
STC ;; ;AN000;
.ELSE ;; ;AN000;
CLC ;; ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
RET ;; ;AN000;
;; ;AN000;
GET_STATEMENT ENDP ;; ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; GET_BYTE ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
GET_BYTE PROC ;; ;AN000;
;; ;AN000;
.IF <SI EQ BUFFER_END> ;; If buffer empty do another read ;AN000;
MOV AH,3FH ;; ;AN000;
MOV DX,OFFSET FILE_BUFFER ;; ;AN000;
MOV CX,BUFFER_SIZE ;; ;AN000;
MOV BX,HANDLE ;; ;AN000;
INT 21H ;; ;AN000;
.IF C ;; Carry set by DOS if file error ;AN000;
CALL FILE_ERROR_PROC ;; ;AN000;
.ELSE ;; ;AN000;
.IF <AX EQ 0> ;; End of file if AX=0 ;AN000;
MOV END_OF_FILE,YES ;; ;AN000;
MOV AH,3EH ;; Close the file ;AN000;
MOV BX,HANDLE ;; ;AN000;
INT 21H ;; ;AN000;
.ELSE ;; ;AN000;
MOV BUFFER_END,AX ;; Number of bytes read ;AN000;
XOR SI,SI ;; Buffer pointer := 0 ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
;; ;AN000;
.IF <FILE_ERROR EQ YES> OR ;; ;AN000;
.IF <END_OF_FILE EQ YES> ;; ;AN000;
STC ;; Unsuccessful get ;AN000;
.ELSE ;; ;AN000;
.IF <<FILE_BUFFER[SI]> EQ 1AH> ;; cHECK for EOF marker ;AN000;
MOV END_OF_FILE,YES ;; ;AN000;
STC ;; ;AN000;
.ELSE ;; ;AN000;
MOV AL,FILE_BUFFER[SI] ;; Return byte in AL ;AN000;
INC SI ;; ;AN000;
CLC ;; Successful get ;AN000;
.ENDIF ;; ;AN000;
.ENDIF ;; ;AN000;
RET ;; ;AN000;
;; ;AN000;
GET_BYTE ENDP ;; ;AN000;
;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
;; Module Name: ;AN000;
;; GROW_SHARED_DATA ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;; ;AN000;
GROW_SHARED_DATA PROC ;; ;AN000;
PUSH BX ;; ;AN000;
ADD BLOCK_END,AX ;; Grow the current block by AX ;AN000;
MOV BX,BLOCK_END ;; ;AN000;
.IF <BX A NB_FREE_BYTES> ;; Check for overflow ;AN000;
MOV BUILD_STATE,NO ;; Stop building shared data ;AN000;
MOV MEM_OVERFLOW,YES ;; ;AN000;
.ENDIF ;; ;AN000;
POP BX ;; ;AN000;
RET ;; ;AN000;
GROW_SHARED_DATA ENDP ;; ;AN000;
;; ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
;AN000;
CODE ENDS ;; ;AN000;
END ;AN000;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;AN000;
|
