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1;********************************************************************************
2; File: PRN_DEF.ASM
3;
4; Subroutines to read the printer profile file, extract the printer names,
5; build a scroll list for the cas services and retrieve addition information
6; from the file on a specific printer.
7; Also contains a subroutine to change the parameters for the SELECT command
8; in the autoexec.bat file.
9;
10;********************************************************************************
11PAGE , 132 ;AN000;
12.ALPHA ;AN000;
13.XLIST ;AN000;
14INCLUDE MACROS.INC ;AN000;
15INCLUDE STRUC.INC ;AN000;
16.LIST ;AN000;
17
18;***************************************************************************
19; Define the public subroutines in this module
20;***************************************************************************
21PUBLIC GET_PRINTER_TITLES_ROUTINE ;AN000;
22PUBLIC GET_PRINTER_INFO_ROUTINE ;AN000;
23PUBLIC RELEASE_PRINTER_INFO_ROUTINE ;AN000;
24PUBLIC CHANGE_AUTOEXEC_ROUTINE ;AN000;
25;***************************************************************************
26; Define the public values in this module
27;***************************************************************************
28PUBLIC SEG_LOC ;AN000; The segment where the printer data is stored
29PUBLIC NAMES_OFF ;AN000; The offset in the segment of the names table
30PUBLIC N_PRN_NAMES ;AN000; The number of printer definitions read from the profile
31PUBLIC MAX_NAME ;AN000; The longest name in the list
32PUBLIC SIZE_NAMES ;AN000; The number of bytes between each printer name (abs)
33PUBLIC SEL_FLG ;AN000; AN000; SELECT runtime flag
34
35EXTRN SYSPARSE: FAR;AN000;
36EXTRN POS_ZERO: FAR;AN000;
37EXTRN COPY_ROUTINE: FAR;AN000;
38EXTRN I_PRINTER: WORD;AN000;
39EXTRN N_PRINTER_TYPE: BYTE;AN000;
40EXTRN S_MODE_PARM: WORD;AN000;
41EXTRN S_CP_DRIVER: WORD;AN000;
42EXTRN S_CP_PREPARE: WORD;AN000;
43EXTRN S_GRAPH_PARM: WORD;AN000;
44EXTRN HOOK_INT_24:FAR;AN000;
45EXTRN RESTORE_INT_24:FAR;AN000;
46EXTRN INT_24_ERROR:WORD;AN000;
47
48
49EXTRN BIN_TO_CHAR_ROUTINE:FAR;AN000;
50
51DATA SEGMENT BYTE PUBLIC 'DATA';AN000;
52
53
54SEL_FLG DB 0 ;AN000; Select flag byte
55;INSTALLRW EQU 80H ;AN000; INSTALL diskette is R/W
56
57SEG_LOC DW 0 ;AN000; Location of the segment where the data is
58NAMES_OFF DW 0 ;AN000; The offset of the names table in the segment
59SEGMENT_SIZE DW 0 ;AN000; Amount of memory available
60BUFFER_START DW 0 ;AN000; Starting offset of the file data buffer
61BUFFER_SIZE DW 0 ;AN000; Number of bytes in the file data buffer
62FILE_PTR_AT_START DD 0 ;AN000; The file pointer for the data which is at
63 ; the beginning of the file data buffer
64AMOUNT_OF_DATA DW 0 ;AN000; The number of bytes in the file data buffer
65CURRENT_PARSE_LOC DW 0 ;AN000; The location to start the next parse.
66END_CUR_LINE DW 0 ;AN000; The address of the end of the line currently being parsed
67CX_ORDINAL_VALUE DW 0 ;AN000; The value returned by the parse for next call
68NUM_PRINTER_DEFS DB 0 ;AN000; The number of printer definitions in the file
69N_PRN_NAMES DW 0 ;AN000; The next free index into the names table
70FILE_HANDLE DW 0 ;AN000; Handle for the printer definition file.
71MAX_NAME DW 0 ;AN000; The length of the longest printer name found in the file
72START_NEXT_LINE DW 0 ;AN000; The starting offset of the next line to parse
73APPEND_POINTER DW 0 ;AN000; Offset of the ASCII-N string to append to the SELECT line
74FILENAME DW 0 ;AN000; Offset of the ASCII-N string containing the filename
75CDP_FOUND DB 0 ;AN000;
76CPP_FOUND DB 0 ;AN000;
77
78
79W_VALUE DW 0 ;AN000;
80STRING_N DB 10 DUP(0);AN000;
81
82
83;AD000;JW BLANK_MODE DW END_BLANK_MODE - $ - 3 ; The blank line for inserting mode parameters
84;AD000;JW DB ' , , , , ',?
85;AD000;JW END_BLANK_MODE EQU $
86
87BLANK_STRING DW 0 ;AN000; Blank values for the other printer profile parameters
88
89E_SIZE_CR_LF EQU 2 ;AN000; The number of bytes in W_CR_LF
90W_CR_LF DB 13,10 ;AN000; Carrage return and line feed to append to the select line
91
92READ_FLAG DB 0 ;AN000; Flag for use when reading data
93 AT_EOF EQU 1B ;AN000; Indicates when the end of file has been reached
94 LAST_LINE EQU 10B ;AN000; Indicates if this is the last line in the buffer
95
96 RESET_EOF EQU 11111110B ;AN000; Masks for resetting the flags
97 RESET_LST_LINE EQU 11111101B ;AN000;
98
99PARSE_FLAG DB 0 ;AN000; Flag for use when parsing the data
100 FIRST_PARSE EQU 1B ;AN000; Indicates if this is the first line being parsed
101 LINE_DONE EQU 10B ;AN000; Indicates if the current line has already been parsed
102 FIRST_NAME EQU 100B ;AN000; Indicates if a printer names has already been found
103
104 RESET_FIRST_PARSE EQU 11111110B ;AN000; Masks for resetting the flags
105 RESET_LINE_DONE EQU 11111101B ;AN000;
106 RESET_FIRST_NAME EQU 11111011B ;AN000;
107
108;***************************************************************************
109; Error codes returned.
110;***************************************************************************
111ERR_NOT_ENOUGH_MEM EQU 1 ;AN000; There was not enough memory to build the names table
112ERR_OPENING_FILE EQU 2 ;AN000; Error opening a file
113ERR_READING_FILE EQU 3 ;AN000; Error reading from a file
114ERR_FINDING_VALUE EQU 4 ;AN000; Error finding the number of prn defs at the beginning of the file
115ERR_LINE_TOO_LONG EQU 5 ;AN000; There was a line too long for the buffer
116ERR_FINDING_NAME EQU 6 ;AN000; There was an error locating a printer name after a P or S
117ERR_ACCESSING_FILE EQU 7 ;AN000; There was an error updating the file pointer
118ERR_TOO_MANY_DEFS EQU 8 ;AN000; There are too many defintion in the file
119ERR_NUMBER_MATCH EQU 9 ;AN000; The number of actual definition do not match the number expected
120ERR_ALLOCATING_MEM EQU 10 ;AN000; There was an error allocating memory
121ERR_CDP_CPP EQU 11 ;AN000; A prn defn had either a CDP or CPP but not both
122ERR_PRN_DEFN EQU 12 ;AN000;
123
124TRUE EQU 1 ;AN000;
125FALSE EQU 0 ;AN000;
126
127
128E_CR EQU 13 ;AN000;
129E_LF EQU 10 ;AN000;
130E_FILE_TERM EQU 1AH ;AN000;
131
132E_MAX_PRN_NAME_LEN EQU 40 ;AN000; The maximum printer name length
133LENGTH_FILE_PTR EQU 4 ;AN000; The number of bytes in the file pointer
134MAX_NUM_PRINTER_DEFS EQU 31 ;AC089;SEH ;AC073; The maximum number of printer definitions
135MIN_SIZE_FILE_BUFFER EQU 0400H ;AN000; The minimum amount of memory needed for the file data buffer
136LENGTH_PRT_TYPE_IND EQU 1 ;AN000; The length of the printer type indicator
137SIZE_NAMES EQU E_MAX_PRN_NAME_LEN+LENGTH_FILE_PTR+LENGTH_PRT_TYPE_IND ;AN000; The size of one entry in the names table
138NAMES_TABLE_SIZE EQU SIZE_NAMES * MAX_NUM_PRINTER_DEFS ;AN000; The size of the names table
139MINIMUM_MEMORY EQU NAMES_TABLE_SIZE + MIN_SIZE_FILE_BUFFER ;AN000; The minimum amount of memory required
140
141RANGE_ONLY EQU 1 ;AN000; The parser is only to look for ranges of values
142RANGE_AND_STRING EQU 3 ;AN000; The parser is to look for ranges and strings
143
144NUMERIC_VALUE EQU 08000H ;AN000; Parser constant for searching for numeric values
145SIMPLE_STRING EQU 02000H ;AN000; Parser constant for searching for strings
146
147
148; Control blocks for the parser.
149; The PARMS INPUT BLOCK
150PARMS LABEL BYTE ;AN000;
151 PAR_EXTEN DW OFFSET PARMSX ;AN000; Offset of the PARMS EXTENSION BLOCK
152 PAR_NUM DB 2 ;AN000; The number of further definitions
153 DB 0 ;AN000;
154 DB 1 ;AN000;
155 DB 1AH ;AN000;
156
157; The PARMS EXTENSION BLOCK
158PARMSX LABEL BYTE;AN000;
159 PAX_MINP DB 0 ;AN000;
160 PAX_MAXP DB 1 ;AN000;
161 DW CONTROL_P1 ;AN000;
162 PAX_MAX_SW DB 0;AN000;
163 PAX_MAX_K1 DB 0;AN000;
164
165; The control blocks for the definition of positional parameters, switch and
166; keywords.
167CONTROL_P1 EQU $ ;AN000;
168CTL_FUNC_FL DW 2000H;AN000;
169 DW 0002H ;AN000;
170 DW RESULT_P1 ;AN000;
171 DW VALUE_LIST_P1 ;AN000;
172 DB 0 ;AN000;
173
174VALUE_LIST_P1 EQU $;AN000;
175VAL_NUM DB 1 ;AN000; Number of value definitions
176 DB 1 ;AN000; Number of range definitions
177 DB 8 ;AN000; Return value if parameter is in this range
178 DD 0 ;AN000;
179 DD 255 ;AN000;
180 DB 0 ;AN000; Number of actual value definitions
181NUM_STRINGS DB 2 ;AN000; Number of string definitions
182 DB 1 ;AN000; Value to be returned if this string is matched
183 DW OFFSET KEYWORD_PARALLEL;AN000;
184 DB 2 ;AN000; Value to be returned if this string is matched
185 DW OFFSET KEYWORD_SERIAL;AN000;
186
187 DB 3 ;AN000; Value to be returned if this string is matched
188 DW OFFSET KEYWORD_MODE;AN000;
189 DB 4 ;AN000; Value to be returned if this string is matched
190 DW OFFSET KEYWORD_CODE_DRIVER;AN000;
191 DB 5 ;AN000; Value to be returned if this string is matched
192 DW OFFSET KEYWORD_CODE_PREPARE;AN000;
193 DB 6 ;AN000; Value to be returned if this string is matched
194 DW OFFSET KEYWORD_GRAPHICS;AN000;
195
196KEYWORD_PARALLEL DB 'P',0;AN000;
197KEYWORD_SERIAL DB 'S',0;AN000;
198KEYWORD_MODE DB 'SP',0;AN000;
199KEYWORD_CODE_DRIVER DB 'CDP',0;AN000;
200KEYWORD_CODE_PREPARE DB 'CPP',0;AN000;
201KEYWORD_GRAPHICS DB 'GP',0;AN000;
202
203RESULT_P1 LABEL BYTE;AN000;
204 DB 0 ;AN000; Type of operand returned
205MATCHED_TAG DB 0 ;AN000; Matched item tag
206SYNONYM_PTR DW 0 ;AN000; Offset of synonym returned
207RESULT_FIELD DB 0,0,0,0 ;AN000; Unsure what this is...
208
209
210;AD000;JW ;***************************************************************************
211;AD000;JW ; Parser control blocks for parsing the mode parameters
212;AD000;JW ;***************************************************************************
213;AD000;JW MODE_PARMS LABEL BYTE
214;AD000;JW DW MODE_PARMSX
215;AD000;JW DB 0
216;AD000;JW
217;AD000;JW MODE_PARMSX LABEL BYTE
218;AD000;JW DB 0,0
219;AD000;JW DB 0
220;AD000;JW DB 1
221;AD000;JW DW OFFSET CNTL_BAUD
222;AD000;JW
223;AD000;JW CNTL_BAUD LABEL BYTE
224;AD000;JW DW SIMPLE_STRING
225;AD000;JW DW 2
226;AD000;JW DW RESULT_P1
227;AD000;JW DW MODE_VALUES
228;AD000;JW DB 5
229;AD000;JW SYN_BAUD DB 'BAUD',0
230;AD000;JW SYN_PARITY DB 'PARITY',0
231;AD000;JW SYN_DATA DB 'DATA',0
232;AD000;JW SYN_STOP DB 'STOP',0
233;AD000;JW SYN_RETRY DB 'RETRY',0
234;AD000;JW
235;AD000;JW MODE_VALUES LABEL BYTE
236;AD000;JW DB 0
237
238
239;***************************************************************************
240; Parser control blocks for parsing the AUTOEXEC.BAT file for 'SELECT'
241;***************************************************************************
242SELECT_PARMX LABEL BYTE ;AN000;
243 DB 1,1 ;AN000;
244 DW SELECT_CONTROL ;AN000;
245 DB 0 ;AN000;
246 DB 0 ;AN000;
247
248SELECT_CONTROL LABEL BYTE;AN000;
249 DW 2000H ;AN000;
250 DW 2 ;AN000;
251 DW RESULT_P1 ;AN000;
252 DW SELECT_VALUE ;AN000;
253 DB 0 ;AN000;
254
255SELECT_VALUE LABEL BYTE ;AN000;
256 DB 3 ;AN000;
257 DB 0 ;AN000;
258 DB 0 ;AN000;
259 DB 1 ;AN000;
260 DB 1 ;AN000;
261 DW OFFSET SELECT_STR;AN000;
262
263SELECT_STR DB 'SELECT',0;AN000;
264ALLOC_FLAG DB 0
265ALLOCATED EQU 80H
266
267
268DATA ENDS ;AN000;
269
270CODE_FAR SEGMENT BYTE PUBLIC 'CODE';AN000;
271
272 ASSUME CS:CODE_FAR, DS:DATA, ES:DATA;AN000;
273
274;***************************************************************************
275; Routines for extracting the printer names from the file data and storing
276; them in a table located in high memory. In addition to the name, the
277; type of printer, whether Parallel or Serial and the location in the file
278; of this printer name is also saved in the table.
279;***************************************************************************
280
281;******************************************************************************
282;
283; Routine: GET_PRINTER_TITLES_ROUTINE - Reads the names of all the printers
284; and their location in the file into a data
285; buffer in high memory.
286;
287; Input:
288; DI - The offset of name of the file which contains the printer definitions
289; in ASCII-N format.
290;
291; Output:
292; If CY = 1: Indicates that an error has occured.
293; BX - The error code for the error which this subroutine detected.
294; AX - The error code which was returned if the error was as a result
295; of a DOS call.
296; If CY = 0: No error has occured.
297; AX, BX - Undefined.
298;
299;******************************************************************************
300GET_PRINTER_TITLES_ROUTINE PROC FAR ;AN000;
301 ;
302 CALL HOOK_INT_24 ;AN000;
303;; int 3
304;; nop
305
306 PUSH ES ;AN000;
307 ;**********************************************************************
308 ; Allocate the necessary memory for the buffer. A maximum of 64K is
309 ; allocated.
310 ;**********************************************************************
311 CALL ALLOCATE_MEMORY ;AN000; Allocate the memory for the printer data
312 .IF < C > ;AN000; Was there an error?
313 JMP EXIT_WITH_ERROR ;AN000; If so, exit the subroutine
314 .ENDIF ;AN000;
315 ;**********************************************************************
316 ; See if there is enough memory to continue.
317 ;**********************************************************************
318 .IF < SEGMENT_SIZE B MINIMUM_MEMORY> ;AN000; Is there enough memory?
319 MOV BX, ERR_NOT_ENOUGH_MEM ;AN000; No! Return error code.
320 JMP EXIT_WITH_ERROR ;AN000; Exit the subroutine
321 .ENDIF ;AN000;
322 ;**********************************************************************
323 ; Set the pointer for the file data buffer and save the size of this buffer.
324 ;**********************************************************************
325 MOV BUFFER_START, NAMES_TABLE_SIZE ;AN000; Starting address of the file data buffer
326 MOV BX, SEGMENT_SIZE ;AN000; Total amount of memory available
327 SUB BX, NAMES_TABLE_SIZE ;AN000; Calculate the size of the file data buffer
328 MOV BUFFER_SIZE, BX ;AN000; Save this size.
329 MOV NAMES_OFF, 0 ;AN000; Offset of the printer names table
330 ;**********************************************************************
331 ; Open the printer definition file.
332 ;**********************************************************************
333 MOV INT_24_ERROR, 0 ;AN000;
334 CALL POS_ZERO ;AN000; Turn the ASCII-N string into an ASCII-Z string
335 MOV DX, DI ;AN000; Get address of the ASCII-N string
336 ADD DX, 2 ;AN000; Address of the filename
337 MOV AX, 3D00H ;AN000; Open file for reading.
338 DOSCALL ;AN000;
339 .IF < C > ;AN000; Was there an error opening the file?
340 MOV BX, ERR_OPENING_FILE ;AN000; Yes! Return this error code
341 JMP EXIT_WITH_ERROR ;AN000;
342 .ENDIF ;AN000;
343 MOV FILE_HANDLE, AX ;AN000; Save the handle for the file
344 ;**********************************************************************
345 ; Initialize the variable which holds the file pointer at the beginning
346 ; of the buffer.
347 ;**********************************************************************
348 MOV WORD PTR FILE_PTR_AT_START, 0 ;AN000; Zero the low word
349 MOV WORD PTR FILE_PTR_AT_START+2, 0 ;AN000; Zero the high word
350 AND READ_FLAG, RESET_EOF ;AN000; Indicate we are not at EOF
351 ;**********************************************************************
352 ; Read data into the file buffer.
353 ;**********************************************************************
354 MOV DI, BUFFER_START ;AN000; Start reading at this offset
355 SUB DI, NAMES_TABLE_SIZE ;AN000; Make into an offset in the buffer instead of the segment
356 CALL READ_FROM_HERE ;AN000; Read in the data.
357 .IF < C > ;AN000; Was there an error reading from the file?
358 MOV BX, ERR_READING_FILE ;AN000; Return this error code
359 JMP EXIT_WITH_ERROR ;AN000; Return from this subroutine
360 .ENDIF ;AN000;
361 ;**********************************************************************
362 ; Initialize the variables needed for the parsing.
363 ;**********************************************************************
364 MOV CURRENT_PARSE_LOC, NAMES_TABLE_SIZE ;AN000; Start parsing from the beginning.
365 MOV CX_ORDINAL_VALUE, 0 ;AN000; The first parse, CX must be zero.
366 MOV N_PRN_NAMES, 0 ;AN000; There are not names in the table now
367 AND PARSE_FLAG, RESET_LINE_DONE ;AN000; The current line has NOT been parsed
368 OR PARSE_FLAG, FIRST_PARSE ;AN000; Indicate that this is the first parse
369 ;**********************************************************************
370 ; Setup the control blocks for the parser
371 ;**********************************************************************
372 MOV PAR_EXTEN, OFFSET PARMSX ;AN000; Load the address of the parse extention block
373 ;**********************************************************************
374 ; Parse the data. If this is the first parse, then look for the number
375 ; of printer definitions. If it is not, then look for the parameters
376 ; P and S which preface the printer names.
377 ;**********************************************************************
378 MOV VAL_NUM, RANGE_ONLY ;AN000; Parse for a range of values only
379 MOV CTL_FUNC_FL, NUMERIC_VALUE ;AN000; Indicate we are looking for numbers
380 MOV NUM_STRINGS, 2 ;AN000; The number of parameters to look for
381 ;**********************************************************************
382 ; See if there is a complete line in the remainder of the buffer. If there
383 ; is not, then read more data into the buffer starting with the start of
384 ; the current line.
385 ;**********************************************************************
386PARSE_NEXT_LINE: ;AN000;
387 CALL SEARCH_LINE ;AN000; Search for the first parameter on the line
388 .IF < C > ;AN000; Was there an error?
389 JMP EXIT_WITH_ERROR ;AN000; Yes! Exit the routine
390 .ENDIF ;AN000;
391 .IF < BIT PARSE_FLAG AND FIRST_PARSE > ;AN000; Looking for a value or a string?
392 .IF < AX NE 0 > ;AN000; Was there an error?
393 MOV BX, ERR_FINDING_VALUE ;AN000; Yes! Return with this error code
394 JMP EXIT_WITH_ERROR ;AN000;
395 .ENDIF ;AN000;
396 MOV AL, RESULT_FIELD ;AN000; Get the low order byte of the value
397 MOV NUM_PRINTER_DEFS, AL ;AN000; Store the number of definitions
398 AND PARSE_FLAG, RESET_FIRST_PARSE ;AN000; Indicate the first parse is finished
399 MOV VAL_NUM, RANGE_AND_STRING ;AN000; Specify strings and ranges
400 MOV CTL_FUNC_FL, SIMPLE_STRING ;AN000; Look for specific strings only.
401 .ENDIF ;AN000;
402 ;**********************************************************************
403 ; See if we found a printer name
404 ;**********************************************************************
405 .IF < AX EQ 0 > ;AN000; Was an error found parsing the buffer
406 .IF < N_PRN_NAMES AE MAX_NUM_PRINTER_DEFS > ;AN000; Are there more the 255 printer defs?
407 MOV BX, ERR_TOO_MANY_DEFS ;AN000; If so, return this error.
408 JMP EXIT_WITH_ERROR ;AN000; Terminate the subroutine.
409 .ENDIF ;AN000;
410 ; DX contains the address of the result block
411 CALL COPY_PRINTER_NAME ;AN000; Copy the name to the table
412 .IF < C > ;AN000; Was there an error?
413 MOV BX, ERR_FINDING_NAME ;AN000; Yes! Return this error code
414 JMP EXIT_WITH_ERROR ;AN000;
415 .ENDIF ;AN000;
416 .ENDIF ;AN000;
417 ;**********************************************************************
418 ; Start scanning the next line.
419 ;**********************************************************************
420 MOV DI, START_NEXT_LINE ;AN000; Get the address of the next line to parse
421 MOV CURRENT_PARSE_LOC, DI ;AN000; Save it
422 .IF < CURRENT_PARSE_LOC EQ 0 > ;AN000; Is there more data?
423 JMP EXIT_WITHOUT_ERROR ;AN000; No! Exit the routine
424 .ENDIF ;AN000;
425 JMP PARSE_NEXT_LINE ;AN000; Start processing this line
426 ;
427EXIT_WITH_ERROR: ;AN000;
428 STC ;AN000; Set the carry flag, indicating error.
429 JMP EXIT_ROUTINE ;AN000;
430EXIT_WITHOUT_ERROR: ;AN000;
431 MOV CX, N_PRN_NAMES ;AN000; The number of entries in the table
432 .IF < CL NE NUM_PRINTER_DEFS > ;AN000; Did the number of definitions agree with the expected number?
433 MOV BX, ERR_NUMBER_MATCH ;AN000; Return this error message
434 JMP EXIT_WITH_ERROR ;AN000; Return, setting the carry flag.
435 .ENDIF ;AN000;
436 CLC ;AN000; Clear the carry flag - No error.
437EXIT_ROUTINE: ;AN000;
438 CALL DEALLOCATE_MEMORY
439 POP ES ;AN000;
440 CALL RESTORE_INT_24;AN000;
441 RET ;AN000;
442 ;
443GET_PRINTER_TITLES_ROUTINE ENDP ;AN000;
444;********************************************************************************
445;
446;SEARCH_LINE: Search for the first parameter on a line.
447;
448;INPUT:
449; None.
450;
451;OUTPUT:
452; AX - Contains the return codes from the parser
453; If CY = 1: There was an error - BX contains an error code
454; if CY = 0: There were NO errors.
455; All the registers are set from the parser return.
456;
457;OPERATION:
458;
459;********************************************************************************
460SEARCH_LINE PROC NEAR ;AN000;
461
462 MOV DI, CURRENT_PARSE_LOC ;AN000; Get the current location in the buffer
463 CALL SCAN_FOR_EOLN ;AN000; Search for the end of the line
464 MOV START_NEXT_LINE, DI ;AN000; Save the start address of the next line
465 .IF < C > ;AN000; Was the END OF LINE found?
466 .IF <BIT READ_FLAG AND AT_EOF> ;AN000; Are we at the end of the file?
467 MOV START_NEXT_LINE, 0 ;AN000; Yes! Indicate that this is the last line
468 .ELSE ;AN000; We are not the the end of the file
469 MOV DI, CURRENT_PARSE_LOC ;AN000; The location to read from in the file
470 SUB DI, NAMES_TABLE_SIZE ;AN000; Make into an offset in the buffer instead of the segment
471 CALL READ_FROM_HERE ;AN000; Read in more data
472 .IF < C > ;AN000; Was there an error reading from the file?
473 MOV BX, ERR_READING_FILE ;AN000; Return this error code
474 JMP EXIT_SEARCH_ERROR ;AN000; Return from this subroutine
475 .ENDIF ;AN000;
476 MOV CURRENT_PARSE_LOC, NAMES_TABLE_SIZE ;AN000; Start back at the beginning of the buffer
477 MOV DI, CURRENT_PARSE_LOC ;AN000; Get the current parse location again.
478 CALL SCAN_FOR_EOLN ;AN000; Once again look for the end of the line
479 MOV START_NEXT_LINE, DI ;AN000; Save the start address of the nest line
480 .IF < C > ;AN000; Was it found?
481 MOV BX, ERR_LINE_TOO_LONG ;AN000; No! Indicate an error.
482 JMP EXIT_SEARCH_ERROR ;AN000; Return with this error
483 .ENDIF ;AN000;
484 .ENDIF ;AN000;
485 .ENDIF ;AN000;
486 ;**********************************************************************
487 ; Set up the input parameters for the parse subroutine
488 ;**********************************************************************
489 MOV DI, OFFSET PARMS ;AN000; Offset into ES of the PARMS control block
490 MOV SI, CURRENT_PARSE_LOC ;AN000; Where to start parsing
491 MOV DX, 0 ;AN000;
492 MOV CX, CX_ORDINAL_VALUE ;AN000; The value returned by the parse last time.
493 PUSH DS ;AN000; Save the current data segment
494 PUSH ES ;AN000; Save the file data segment
495 MOV AX, DATA ;AN000; Get the current data segment
496 MOV ES, AX ;AN000; This is the parser control blocks.
497 MOV AX, SEG_LOC ;AN000; Where the data to parse is located
498 MOV DS, AX ;AN000;
499 CALL SYSPARSE ;AN000; Do the parsing
500 POP ES ;AN000; Restore the file data segment
501 POP DS ;AN000; Restore the data segment
502 CLC ;AN000; Indicate there were no errors
503 RET ;AN000;
504EXIT_SEARCH_ERROR: ;AN000; Here if there were errors
505 STC ;AN000; Indicate so to the calling program
506 RET ;AN000;
507
508SEARCH_LINE ENDP;AN000;
509;********************************************************************************
510; ALLOCATE_MEMORY: Allocate a maximum of 64K of memory.
511;
512; INPUT:
513; None.
514;
515; OUTPUT:
516; SEGMENT_SIZE = The size of the segment allocated.
517; SEG_LOC = The location of the segment allocated.
518; If CY = 1: There was an error - BX contains an error code
519; If CY = 0: There was NO errors.
520;
521; Operation:
522;
523;********************************************************************************
524ALLOCATE_MEMORY PROC NEAR;AN000;
525
526 AND ALLOC_FLAG,NOT ALLOCATED
527 MOV BX, 0FFFH ;AN000; Try to allocate this amount of memory
528 MOV SEGMENT_SIZE, BX ;AN000; Save the amount of memory asked for
529 MOV AH, 48H ;AN000; DOS Fn. for allocating memory
530 DOSCALL ;AN000; Allocate the memory
531 .IF < C > ;AN000; Was there an error?
532 MOV SEGMENT_SIZE, BX ;AN000; Save the size asked for in this request
533 MOV AH, 48H ;AN000; DOS Fn. for allocating memory
534 DOSCALL ;AN000; Allocate the memory
535 .ENDIF ;AN000;
536 .IF < C > ;AN000; Was there an error allocating the memory?
537 MOV BX, ERR_ALLOCATING_MEM ;AN000; Yes! Return an error code
538 STC ;AN000; Indicate that there was an error
539 .ELSE ;AN000; Otherwise...
540 MOV SEG_LOC, AX ;AN000; Save the location of the memory block allocated
541 MOV ES, AX ;AN000; Save in the extra segment
542 MOV CL, 4 ;AN000; Multiply the number of paragraphs by 16
543 SHL SEGMENT_SIZE, CL ;AN000; to get the number of bytes.
544 OR ALLOC_FLAG,ALLOCATED
545 CLC ;AN000; Indicate there was no error
546 .ENDIF ;AN000;
547 RET ;AN000;
548
549ALLOCATE_MEMORY ENDP;AN000;
550
551
552;********************************************************************************
553; DEALLOCATE_MEMORY: deallocate memory.
554;
555; INPUT:
556; SEG_LOC previously allocated segment
557;
558; OUTPUT:
559; None.
560;
561;********************************************************************************
562DEALLOCATE_MEMORY PROC NEAR
563
564 TEST ALLOC_FLAG,ALLOCATED
565 JZ DEM10
566
567 PUSH ES
568 MOV AX,SEG_LOC
569 MOV ES,AX
570 MOV AH,49H
571 INT 21H
572 POP ES
573DEM10:
574 RET
575DEALLOCATE_MEMORY ENDP
576
577;*******************************************************************************
578;
579; Routine: SCAN_FOR_EOLN - Scan the given string, for CR and LF.
580;
581; Input:
582; DI - Address of the string to scan for the eoln.
583;
584; Output:
585; If CY = 0: The end of the line was found.
586; DI - Contains the address of the start of the next line in the buffer.
587; - If DI = 0, the data ends just after either the CR, LF or the
588; CR and LF. Therefore, more data must be read before the next line
589; can be parsed.
590;
591; If CY = 1: The end of the line was not found.
592;
593;*******************************************************************************
594SCAN_FOR_EOLN PROC NEAR;AN000;
595
596 MOV CX, BUFFER_START ;AN000; The offset in the segment of the buffer
597 ADD CX, AMOUNT_OF_DATA ;AN000; Get the offset of the end of the data
598 SUB CX, DI ;AN000; Subtract the file data pointer
599 ; CX - Contains the amount of data after pointer
600 MOV AL, 0 ;AN000; Flag to indicate CR-LF has not been found yet
601 .WHILE < CX A 0 > ;AN000; Search until the end of the data
602 .IF < <BYTE PTR ES:[DI]> EQ E_FILE_TERM >;AN000;
603 .IF < ZERO AL > ;AN000;
604 MOV END_CUR_LINE, DI ;AN000; Save this location in the string
605 DEC END_CUR_LINE ;AN000; Point to the real end of the line
606 .ENDIF ;AN000;
607 STC ;AN000;
608 MOV DI, 0 ;AN000;
609 JMP EXIT_SCAN ;AN000;
610 .ENDIF ;AN000;
611 .IF < <BYTE PTR ES:[DI]> EQ E_LF > OR ;AN000; Is this character a CR or a LF?
612 .IF < <BYTE PTR ES:[DI]> EQ E_CR > ;AN000;
613 .IF < ZERO AL > ;AN000; Has a CR or a LF already been found?
614 MOV END_CUR_LINE, DI ;AN000; Save this location in the string
615 DEC END_CUR_LINE ;AN000; Point to the real end of the line
616 .ENDIF ;AN000;
617 INC AL ;AN000; Indicate that a CR or a LF has been found
618 .ELSEIF < NONZERO AL > ;AN000; If we have passed the CR-LF,
619 CLC ;AN000; Indicate we have found EOLN
620 JMP EXIT_SCAN ;AN000; Leave the subroutine
621 .ENDIF ;AN000;
622 DEC CX ;AN000; One less character to the end
623 INC DI ;AN000; Point to the next character
624 .ENDWHILE ;AN000;
625
626 .IF < AL AE 2 > ;AN000; Does the data run out right after the CR-LF?
627 MOV DI, 0 ;AN000; Return 0 indicating so.
628 .ENDIF ;AN000;
629 STC ;AN000; Indicate that the whole line is not there
630
631EXIT_SCAN: ;AN000;
632 RET ;AN000;
633
634SCAN_FOR_EOLN ENDP;AN000;
635;*******************************************************************************
636;
637; Routine: COPY_PRINTER_NAME - Copy the name of the printer from the file
638; into the buffer holding all the names.
639;
640; Input:
641; SI - Contains the address of the start of the printer name.
642; DX - Contains the address of the parse result block
643;
644; Output:
645; CY = 1: An error has occured. The name of the printer has not been found.
646; CY = 0: No error.
647;
648; Operation: The name from the file buffer is copied to the printer name
649; table. Starting from the address passed in DI, the file buffer is
650; scanned until a valid character is found. Starting from this point
651; up to forty characters are transferred to the name table. If no
652; name is found, the carry flag is set, and nothing is recorded in the
653; name table.
654; After the name is copied, the remainder of the field in the table
655; is cleared.
656;
657;*******************************************************************************
658COPY_PRINTER_NAME PROC NEAR;AN000;
659
660 PUSH DS ;AN000;
661 PUSH ES ;AN000;
662 PUSH DX ;AN000; Save the address of the result block
663 ;**********************************************************************
664 ; Calculate the offset into the file data table for this entry
665 ;**********************************************************************
666 MOV AX, N_PRN_NAMES ;AN000; The next free index into the names table
667 MOV BX, SIZE_NAMES ;AN000; Get the number of bytes per entry
668 MUL BX ;AN000; Multiply by the index into the table
669 MOV DI, AX ;AN000; Move the offset into an index register
670 ;**********************************************************************
671 ; Copy the type of printer first
672 ;**********************************************************************
673 POP BX ;AN000; Get the result block address
674 MOV AL, DS:[BX+1] ;AN000; Get the matched item tag
675 .IF < AL EQ 1 > ;AN000; Was the parameter a P?
676 MOV AL, 'P' ;AN000; Yes!
677 .ELSE ;AN000;
678 MOV AL, 'S' ;AN000; No! It was an S
679 .ENDIF ;AN000;
680 MOV ES:[DI+40], AL ;AN000; Store in the table
681 ;**********************************************************************
682 ; Skip the spaces between the printer type indicator and the printer name
683 ;**********************************************************************
684 MOV AL, 32 ;AN000; Character to skip - space
685 XCHG SI, DI ;AN000; Point DI to the line being scanned
686 MOV CX, END_CUR_LINE ;AN000; Get address of the last char in line
687 SUB CX, DI ;AN000; Subtract start
688 INC CX ;AN000; Get the length of the line
689 CLD ;AN000; Scan forward
690 REPZ SCASB ;AN000; Repeat search until character found
691 JZ NAME_NOT_FOUND ;AN000; If all spaces, then it is an error
692 INC CX ;AN000; Increment character count
693 DEC DI ;AN000; Decrement pointer to character
694 ;***********************************************************************
695 ; Move the printer name to the names list
696 ;***********************************************************************
697 XCHG SI, DI ;AN000; Exchange the pointers again
698 MOV CX, END_CUR_LINE ;AN000; Get the address of the last char
699 SUB CX, SI ;AN000; Subtract start
700 INC CX ;AN000; Get the length of the line
701 .IF < CX A E_MAX_PRN_NAME_LEN > ;AN000; Is the length of the line too long?
702 MOV CX, E_MAX_PRN_NAME_LEN ;AN000; Yes! Make the line length the maximum size
703 .ENDIF ;AN000;
704 MOV DX, CX ;AN000; Save the line length for later use
705 .WHILE < NONZERO CX > ;AN000; Do while there are more characters in the string
706 MOV AL, BYTE PTR ES:[SI] ;AN000; Get a character from the file data
707 .IF < AL NE 32 > ;AN000; Is this character a space?
708 MOV BX, DX ;AN000; Get the line length
709 SUB BX, CX ;AN000; Get the length of the line copied so far
710 INC BX ;AN000;
711 .IF < MAX_NAME B BX > ;AN000; Is this name longer than the longest so far?
712 MOV MAX_NAME, BX ;AN000; Yes! This is the new maximum
713 .ENDIF ;AN000;
714 .ENDIF ;AN000;
715 MOV BYTE PTR ES:[DI], AL ;AN000; Put the character in the names table
716 INC SI ;AN000; Increment string pointers
717 INC DI ;AN000;
718 DEC CX ;AN000; Decrement the number of characters left
719 .ENDWHILE ;AN000;
720 ;***********************************************************************
721 ; Fill in the rest of the name area with spaces
722 ;***********************************************************************
723 MOV CX, E_MAX_PRN_NAME_LEN ;AN000; The maximum line length
724 ; DX contains the line length from last section
725 SUB CX, DX ;AN000; Calculate the space left in the line
726 MOV AL, 32 ;AN000; Character to store
727 REP STOSB ;AN000; Store the blank characters
728 ;***********************************************************************
729 ; Store the file pointer to this printer name in the name list
730 ;***********************************************************************
731 INC DI ;AN000; Point DI passed the printer type indicator
732 MOV SI, CURRENT_PARSE_LOC ;AN000; Get the start of the current line
733 SUB SI, NAMES_TABLE_SIZE ;AN000; Subtract offset of the start of the buffer
734 MOV CX, WORD PTR FILE_PTR_AT_START ;AN000; Get the low order word of the pointer
735 MOV DX, WORD PTR FILE_PTR_AT_START[2] ;AN000; Get the high order word
736 ADD CX, SI ;AN000; Add the offset of the start of this line
737 ADC DX, 0 ;AN000; Add the high word
738 MOV WORD PTR ES:[DI], CX ;AN000; Store the low order word in the list
739 MOV WORD PTR ES:[DI+2], DX ;AN000; Store the high order word
740 INC N_PRN_NAMES ;AN000; Point to the next free area in the list
741 CLC ;AN000;
742 JMP EXIT_COPY ;AN000;
743NAME_NOT_FOUND: ;AN000;
744 STC ;AN000;
745EXIT_COPY: ;AN000;
746 POP ES ;AN000;
747 POP DS ;AN000;
748 RET ;AN000;
749
750COPY_PRINTER_NAME ENDP ;AN000;
751
752;*******************************************************************************
753; Routine: READ_FROM_HERE - Read from the file into the buffer starting from
754; the file position pointed to by CURRENT_PARSE_LOC.
755;
756; Input:
757; DI - Contains the current parsing location in the buffer.
758;
759; Output:
760; FILE_PTR_AT_START - Updated for the new data read.
761;
762; Operation:
763;
764;*******************************************************************************
765READ_FROM_HERE PROC NEAR;AN000;
766 ;
767 ;**********************************************************************
768 ; Update the R/W pointer in the file.
769 ;**********************************************************************
770 MOV DX, WORD PTR FILE_PTR_AT_START ;AN000; Get the low order word of the pointer
771 MOV CX, WORD PTR FILE_PTR_AT_START[2] ;AN000; Get the high order word of the pointer
772 ADD DX, DI ;AN000; Add the offset of where to start reading
773 ADC CX, 0 ;AN000; Take care of the carry condition
774 MOV WORD PTR FILE_PTR_AT_START, DX ;AN000; Store the new starting position
775 MOV WORD PTR FILE_PTR_AT_START[2], CX ;AN000; Store the high word of pointer
776 MOV INT_24_ERROR, 0 ;AN000;
777 MOV AX, 4200H ;AN000; DOS Function for moving the file pointer
778 MOV BX, FILE_HANDLE ;AN000; Load the file handle
779 DOSCALL ;AN000; Move the file pointer
780 .IF < C > ;AN000; Was an error encountered?
781 JMP RETURN_WITH_ERROR ;AN000; Yes! Exit the subroutine.
782 .ENDIF ;AN000;
783 ;**********************************************************************
784 ; Read from the file into the data buffer
785 ;**********************************************************************
786 MOV CX, BUFFER_SIZE ;AN000; Number of bytes to read. As many as will fit.
787 MOV BX, FILE_HANDLE ;AN000; Load the DOS file handle for this file
788 MOV AH, 03FH ;AN000; The DOS function to perform
789 MOV DX, BUFFER_START ;AN000; The offset of the file data buffer
790 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
791 PUSH DS ;AN000; Save the current data segment
792 PUSH ES ;AN000; Push the file data buffer
793 POP DS ;AN000; DS now points to the file data buffer
794 DOSCALL ;AN000; Read from the file.
795 POP DS ;AN000; Restore the original data segment
796 ;**********************************************************************
797 ; See if the buffer was filled.
798 ;**********************************************************************
799 MOV AMOUNT_OF_DATA, AX ;AN000; Save the amount of data that was read.
800 .IF < AX B BUFFER_SIZE > ;AN000; Were less bytes read then we asked for?
801 OR READ_FLAG, AT_EOF ;AN000; Yes! Indicate that we are at EOF
802; MOV DI, AX ; Move number of characters into an index pointer
803; MOV BYTE PTR ES:[DI+NAMES_TABLE_SIZE], 00 ; Place a terminator at the end
804 .ENDIF ;AN000;
805 CLC ;AN000;
806 RET ;AN000;
807
808RETURN_WITH_ERROR: ;AN000;
809 STC ;AN000;
810 RET ;AN000;
811
812READ_FROM_HERE ENDP ;AN000;
813
814;********************************************************************************
815; Routines for extracting all the information supplied in the profile for a
816; specific printer. Given the printer number, the location of its definition
817; is looked up in the names table. The file is them parsed for the information.
818;********************************************************************************
819
820;******************************************************************************
821; GET_PRINTER_INFO_ROUTINE - Get all the information contained in the printer
822; profile file for the specified printer.
823;
824; INPUT:
825; AX - The number of the printer to return the information on. The number
826; is the index into the names table for this printer.
827;
828; OUTPUT:
829; If CY = 0, there were no errors.
830; The following variable are updated with the information found in
831; the file:
832; I_PRINTER
833; N_PRINTER_TYPE
834; S_MODE_PARM
835; S_CP_DRIVER
836; S_CP_PREPARE
837; S_GRAPH_PARM
838;
839; If CY = 1, There were errors encountered.
840; BX = An error code indicating the type of error that occured.
841;
842; = 3 There was an error reading the file
843; = 7 There was a error accessing the file
844; = 11 A printer definition has either a CDP or a CPP
845; Prefix, but BOTH were not present.
846; = 12 There was an error in the printer definition.
847; - A line was found with an invalid prefix
848;
849; If the error was a result of a DOS function, then
850; on return, AX will contain the DOS error code.
851;
852; Operation:
853;
854; Note:
855; The first printer name has an index of 1.
856;
857;******************************************************************************
858GET_PRINTER_INFO_ROUTINE PROC FAR;AN000;
859
860
861
862 CALL HOOK_INT_24 ;AN000;
863
864
865
866 PUSH ES ;AN000; Save the extra segment register
867 ;**********************************************************************
868 ; Calculate the address of the specifed printer
869 ;**********************************************************************
870 MOV I_PRINTER, AX ;AN000; Save the printer index
871 DEC AX ;AN000; Make the first index a 0
872 MOV BX, SIZE_NAMES ;AN000; Number of bytes in each table entry
873 MUL BX ;AN000; Address is returned in AX
874 MOV DI, AX ;AN000; Move the address to an index register
875 ;**********************************************************************
876 ; Get the file location for this printer name
877 ;**********************************************************************
878 MOV AX, SEG_LOC ;AN000; Get the segment where the data is
879 MOV ES, AX ;AN000; Save in a segment register
880 MOV CX, WORD PTR ES:[DI+41] ;AN000; Get the low order word of the file location
881 MOV DX, WORD PTR ES:[DI+43] ;AN000; Get the high order word of the file location
882 ;**********************************************************************
883 ; Determine if the information is already in the buffer or do we have
884 ; to read more information from the printer profile.
885 ;**********************************************************************
886 .IF < DX B <WORD PTR FILE_PTR_AT_START+2>> ;AN000; Compare the high order words
887 JMP READ_MORE_INFORMATION ;AN000; Info in buffer is passed where we want.
888 .ELSE ;AN000;
889 .IF < DX EQ < WORD PTR FILE_PTR_AT_START+2>> AND ;AN000; High words equal so
890 .IF < CX B <WORD PTR FILE_PTR_AT_START>> ;AN000; compare the low order words
891 JMP READ_MORE_INFORMATION ;AN000; Info in buffer is passed where we want.
892 .ENDIF ;AN000;
893 .ENDIF ;AN000;
894 MOV BX, WORD PTR FILE_PTR_AT_START+2 ;AN000; File location at beginning of buffer
895 MOV SI, WORD PTR FILE_PTR_AT_START ;AN000; Low order word
896 ADD SI, AMOUNT_OF_DATA ;AN000; Get the file pointer of the end of the buffer
897 ADC BX, 0 ;AN000; Add in the high word
898 .IF < DX A BX > ;AN000; If data we want is further in the file,
899 JMP READ_MORE_INFORMATION ;AN000; Read in more data
900 .ELSE ;AN000;
901 .IF < DX EQ BX > AND ;AN000; If the high words are equal do the
902 .IF < CX A SI > ;AN000; comparison on the low order words
903 JMP READ_MORE_INFORMATION ;AN000; Still not there, so read more info
904 .ENDIF ;AN000;
905 .ENDIF ;AN000;
906 MOV AX, I_PRINTER ;AN000; Get the index of this printer name
907 .IF < AL EQ NUM_PRINTER_DEFS > ;AN000; Is this the last one in the list?
908 .IF < BIT READ_FLAG AND AT_EOF > ;AN000; If it is, and all the data has been read, process it
909 JMP PARSE_HERE ;AN000;
910 .ELSE ;AN000;
911 JMP READ_MORE_INFORMATION ;AN000; Not EOF, so read in more data just for safety
912 .ENDIF ;AN000;
913 .ENDIF ;AN000;
914 MOV CX, WORD PTR ES:[DI+SIZE_NAMES+41] ;AN000; Get the pointer to the NEXT printer name
915 MOV DX, WORD PTR ES:[DI+SIZE_NAMES+43] ;AN000; Get the high order word
916 .IF < DX A BX > ;AN000; See if the next printer name is in the buffer
917 JMP READ_MORE_INFORMATION ;AN000; If not, get more information
918 .ELSE ;AN000;
919 .IF < DX EQ BX > AND ;AN000; If the high order words are equal,
920 .IF < CX A SI > ;AN000; Compare the low order. Is the name there?
921 JMP READ_MORE_INFORMATION ;AN000; If not, read more.
922 .ENDIF ;AN000;
923 .ENDIF ;AN000;
924 JMP PARSE_HERE ;AN000; The necessary info is there, so parse it.
925 ;**********************************************************************
926 ; The specified printer information is not currently in the buffer. It
927 ; is necessary to read it from the printer profile file.
928 ;**********************************************************************
929READ_MORE_INFORMATION: ;AN000;
930 MOV CX, WORD PTR ES:[DI+43] ;AN000; Get the file pointer of this printer name
931 MOV DX, WORD PTR ES:[DI+41] ;AN000; Get the low order word of pointer
932 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
933 MOV AX, 4200H ;AN000; DOS Fn. for positioning file pointer
934 MOV BX, FILE_HANDLE ;AN000; Get the handle of the file
935 DOSCALL ;AN000; Position the pointer
936 .IF < C > ;AN000; If CY = 1, there was an error
937 MOV BX, ERR_ACCESSING_FILE ;AN000; Return this error code
938 JMP ERROR_EXIT ;AN000; Jump to exit routine
939 .ENDIF ;AN000;
940 MOV WORD PTR FILE_PTR_AT_START, AX ;AN000; Set the new pointer at the beginning of the buffer
941 MOV WORD PTR FILE_PTR_AT_START+2, DX ;AN000; Set the high order word
942 MOV AH, 3FH ;AN000; DOS Fn. for reading from a file
943 MOV DX, BUFFER_START ;AN000; Offset of the start of the data buffer
944 MOV BX, FILE_HANDLE ;AN000; Get the file handle
945 MOV CX, BUFFER_SIZE ;AN000; Read as many bytes as the buffer will hold
946 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
947 PUSH DS ;AN000; Save the current data segment
948 PUSH ES ;AN000; Push the segment of the data buffer
949 POP DS ;AN000; Load DS with the segment where to store the data
950 DOSCALL ;AN000; Read in the data
951 POP DS ;AN000; Restore the data segment
952 .IF < C > ;AN000;
953 MOV BX, ERR_READING_FILE;AN000;
954 JMP ERROR_EXIT;AN000;
955 .ENDIF ;AN000;
956 .IF < AX NE BUFFER_SIZE > ;AN000; Were less bytes read then asked for?
957 OR READ_FLAG, AT_EOF ;AN000; If so, then we are at the end of file
958 .ELSE ;AN000; Otherwise...
959 AND READ_FLAG, RESET_EOF ;AN000; We are not at end of file
960 .ENDIF ;AN000;
961 MOV AMOUNT_OF_DATA, AX ;AN000; Save the amount of data actually read
962 ;**********************************************************************
963 ; The printer data is in the data buffer. Begin to parse the data.
964 ;**********************************************************************
965PARSE_HERE: ;AN000;
966 MOV CDP_FOUND, FALSE ;AN000;
967 MOV CPP_FOUND, FALSE ;AN000;
968 PUSH DI ;AN000; Save the pointer into the names table
969 ;**********************************************************************
970 ; Load the printer profile fields with defaults.
971 ;**********************************************************************
972 COPY_STRING S_MODE_PARM, 40, BLANK_STRING ;AC000;JW
973 COPY_STRING S_CP_DRIVER, 22, BLANK_STRING ;AN000;
974 COPY_STRING S_CP_PREPARE, 12, BLANK_STRING ;AN000;
975 COPY_STRING S_GRAPH_PARM, 20, BLANK_STRING ;AN000;
976 POP DI ;AN000; Restore the pointer into the names table
977 ;**********************************************************************
978 ; Get the type of printer.
979 ;**********************************************************************
980 MOV AL, ES:[DI+40] ;AN000; Get the printer type - Parallel or Serial from the table
981 MOV N_PRINTER_TYPE, AL ;AN000; Save in the appropriate variable
982 ;**********************************************************************
983 ; Get the offset of the start of this printer definition
984 ;**********************************************************************
985 MOV CX, ES:[DI+41] ;AN000; Get the low order word of the file pointer
986 MOV DX, ES:[DI+43] ;AN000; Get the high order word
987 SUB DX, WORD PTR FILE_PTR_AT_START[2] ;AN000; Subtract the high order words
988 SBB CX, WORD PTR FILE_PTR_AT_START ;AN000; Subtract the low order words
989 ADD CX, BUFFER_START ;AN000; Get the offset of the start of the definition
990 MOV CURRENT_PARSE_LOC, CX ;AN000; Save as the scan position
991 OR PARSE_FLAG, FIRST_NAME ;AN000;
992PARSE_NEXT_PARM: ;AN000;
993 MOV DI, CURRENT_PARSE_LOC ;AN000; Get the current scan position
994 CALL SCAN_FOR_EOLN ;AN000; Search for the end of this line
995 MOV START_NEXT_LINE, DI ;AN000; Save the position of the start of the next line
996 MOV SI, CURRENT_PARSE_LOC ;AN000; The position in the buffer to scan
997 MOV NUM_STRINGS, 6 ;AN000; Number of parameters to parse for
998 MOV DI, OFFSET PARMS ;AN000; Offset of the parameter blocks
999 MOV DX, 0 ;AN000; The parser wants DX = 0.
1000 MOV CX, 0 ;AN000; Tell the parser this is the first scan of this line
1001 PUSH DS ;AN000; Save the current data segment
1002 PUSH ES ;AN000; Save the file data segment
1003 MOV AX, DATA ;AN000; Get the current data segment
1004 MOV ES, AX ;AN000; This is the parser control blocks.
1005 MOV AX, SEG_LOC ;AN000; Where the data to parse is located
1006 MOV DS, AX ;AN000;
1007 CALL SYSPARSE ;AN000; Do the parsing
1008 POP ES ;AN000; Restore the file data segment
1009 POP DS ;AN000; Restore the data segment
1010 .IF < AX EQ 0FFFFH > ;AN000; Was the end of the line found?
1011 JMP UPDATE_PARSE_PTR ;AN000; If so, start the next one
1012 .ELSEIF < NONZERO AX > ;AN000; Was an error encountered parsing the line?
1013 MOV BX, ERR_PRN_DEFN ;AN000;
1014 JMP ERROR_EXIT ;AN000; If so, exit the subroutine
1015 .ENDIF ;AN000;
1016 MOV AL, MATCHED_TAG ;AN000; Get which string was matched
1017 .IF < AL EQ 1 > OR ;AN000; Was this a printer name and type?
1018 .IF < AL EQ 2 > ;AN000;
1019 .IF < BIT PARSE_FLAG AND FIRST_NAME > ;AN000; Is this the first name encountered?
1020 AND PARSE_FLAG, RESET_FIRST_NAME ;AN000; Indicate that the a name has been found
1021 .ELSE ;AN000; Otherwise...
1022 JMP PARSING_DONE ;AN000; This is the second name. We are finished.
1023 .ENDIF ;AN000;
1024 .ELSEIF < AL EQ 3 > ;AN000; AL = 3 ==> Mode parameters
1025 CALL HANDLE_MODE ;AN000; Process
1026 .ELSEIF < AL EQ 4 > ;AN000; AL = 4 ==> Code page driver parameters
1027 MOV CDP_FOUND, TRUE ;AN000;
1028 CALL HANDLE_CODE_DRIVER ;AN000; Process
1029 .ELSEIF < AL EQ 5 > ;AN000; AL = 5 ==> Code page preparation parameters
1030 MOV CPP_FOUND, TRUE ;AN000;
1031 CALL HANDLE_CODE_PREPARE ;AN000; Process
1032 .ELSEIF < AL EQ 6 > ;AN000; AL = 6 ==> Graphics parameters
1033 CALL HANDLE_GRAPHICS ;AN000; Process
1034 .ENDIF ;AN000;
1035 ;**********************************************************************
1036 ; The current line has been parsed. Point to the next line.
1037 ;**********************************************************************
1038UPDATE_PARSE_PTR: ;AN000;
1039 MOV AX, START_NEXT_LINE ;AN000; Get the address of the start of the next line
1040 MOV CURRENT_PARSE_LOC, AX ;AN000; Save this as the start of the current line
1041 .IF < CURRENT_PARSE_LOC EQ 0 > ;AN000; Is there any more data?
1042 JMP PARSING_DONE ;AN000; No. Exit the routine
1043 .ENDIF ;AN000;
1044 JMP PARSE_NEXT_PARM ;AN000; Start the parsing again
1045 ;**********************************************************************
1046 ; The subroutine is finished.
1047 ;**********************************************************************
1048PARSING_DONE: ;AN000;
1049 MOV AL, CDP_FOUND ;AN000;
1050 XOR AL, CPP_FOUND ;AN000;
1051 .IF < NZ > ;AN000;
1052 MOV BX, ERR_CDP_CPP ;AN000;
1053 JMP ERROR_EXIT ;AN000;
1054 .ENDIF ;AN000;
1055 CLC ;AN000; Clear the carry - No errors
1056 JMP EXIT_INFO ;AN000; Exit the subroutine
1057ERROR_EXIT: ;AN000;
1058 STC ;AN000; Set the carry - There were errors
1059EXIT_INFO: ;AN000;
1060 POP ES ;AN000; Restore the extra segment
1061 CALL RESTORE_INT_24;AN000;
1062 RET ;AN000; return
1063
1064GET_PRINTER_INFO_ROUTINE ENDP;AN000;
1065;********************************************************************************
1066; HANDLE_MODE - Subroutine to process the mode parameter line in the printer
1067; profile.
1068;
1069; INPUT:
1070; SI - Points to the beginning of the line to process
1071;
1072; OUTPUT:
1073; S_MODE_PARM - Filled with the information from the line. The line will be
1074; in a format for use as the parameters for the MODE command.
1075;
1076;********************************************************************************
1077HANDLE_MODE PROC NEAR;AN000;
1078
1079;AD000;JW PUSH SI
1080;AD000;JW COPY_STRING S_MODE_PARM, 13, BLANK_MODE
1081;AD000;JW POP SI
1082;AD000;JW
1083;AD000;JW NEXT_MODE_SCAN: ; Scan for the next keyword.
1084;AD000;JW MOV DI, OFFSET MODE_PARMS ; Offset of the control blocks for parsing the mode parameters
1085;AD000;JW MOV CX, 0 ; Always tell the parser this is the first parse
1086;AD000;JW MOV DX, 0 ; The parse wants DX = 0
1087;AD000;JW PUSH ES ; Save the segment registers
1088;AD000;JW PUSH DS
1089;AD000;JW MOV AX, DATA ; Get the location of the data segment
1090;AD000;JW MOV ES, AX ; Load in the extra segment register - The segment of the control blocks
1091;AD000;JW MOV AX, SEG_LOC ; Get the location of the printer data
1092;AD000;JW MOV DS, AX ; Load into the data segment - The segment of the data to parse
1093;AD000;JW CALL SYSPARSE ; Parse the line.
1094;AD000;JW POP DS ; Restore the segment registers
1095;AD000;JW POP ES
1096;AD000;JW
1097;AD000;JW ; PUSHH <AX,BX,CX,DX,SI,DI>
1098;AD000;JW ; MOV W_VALUE, AX
1099;AD000;JW ; WORD_TO_CHAR W_VALUE, STRING_N
1100;AD000;JW ; PRINTN STRING_N
1101;AD000;JW ; CR_LF
1102;AD000;JW ; POPP <DI,SI,DX,CX,BX,AX>
1103;AD000;JW
1104;AD000;JW .IF < NONZERO AX > ; If errors or the end of the line, end the routine
1105;AD000;JW JMP EXIT_MODE_SCAN
1106;AD000;JW .ENDIF
1107;AD000;JW MOV BX, DX ; Move result pointer into an index register
1108;AD000;JW .IF <<WORD PTR [BX+2]> EQ <OFFSET SYN_BAUD>> ; Was this the BAUD keyword?
1109;AD000;JW MOV AX, 5 ; Maximum number of character to copy
1110;AD000;JW MOV DI, OFFSET S_MODE_PARM+2 ; Where to put the baud parameters
1111;AD000;JW .ELSEIF <<WORD PTR [BX+2]> EQ <OFFSET SYN_PARITY>> ; Was this the PARITY keyword?
1112;AD000;JW MOV AX, 1 ; Maximum number of character to copy
1113;AD000;JW MOV DI, OFFSET S_MODE_PARM+8 ; Where to put the parity parameters
1114;AD000;JW .ELSEIF <<WORD PTR [BX+2]> EQ <OFFSET SYN_DATA>> ; Was this the DATA keyword?
1115;AD000;JW MOV AX, 1 ; Maximum number of character to copy
1116;AD000;JW MOV DI, OFFSET S_MODE_PARM+10 ; Where to put the data parameters
1117;AD000;JW .ELSEIF <<WORD PTR [BX+2]> EQ <OFFSET SYN_STOP>> ; Was this the STOP keyword?
1118;AD000;JW MOV AX, 1 ; Maximum number of character to copy
1119;AD000;JW MOV DI, OFFSET S_MODE_PARM+12 ; Where to put the stop parameters
1120;AD000;JW .ELSEIF <<WORD PTR [BX+2]> EQ <OFFSET SYN_RETRY>> ; Was this the RETRY keyword?
1121;AD000;JW MOV AX, 1 ; Maximum number of character to copy
1122;AD000;JW MOV DI, OFFSET S_MODE_PARM+14 ; Where to put the retry parameters
1123;AD000;JW .ENDIF
1124;AD000;JW CALL COPY_RESULT ; Copy the string
1125;AD000;JW JMP NEXT_MODE_SCAN ; Scan for the next keyword
1126;AD000;JW EXIT_MODE_SCAN:
1127;AD000;JW CALL REMOVE_BLANKS ; Remove the blanks from the mode line
1128;AD000;JW
1129
1130 MOV DI, OFFSET S_MODE_PARM ;AN000; Offset of the variable to load JW
1131 MOV CX, 40 ;AN000; Maximum width of the field JW
1132 CALL COPY_LINE ;AN000; Copy the information from the file data JW
1133 RET ;AN000; Return JW
1134
1135HANDLE_MODE ENDP;AN000;
1136;AD000;JW ;********************************************************************************
1137;AD000;JW ; REMOVE_BLANKS: Remove the blanks from the S_MODE_PARM string. Any trailing
1138;AD000;JW ; commas are also removed.
1139;AD000;JW ;
1140;AD000;JW ; INPUT:
1141;AD000;JW ; None.
1142;AD000;JW ;
1143;AD000;JW ; OUTPUT:
1144;AD000;JW ; None.
1145;AD000;JW ;
1146;AD000;JW ; OPERATION:
1147;AD000;JW ;
1148;AD000;JW ;
1149;AD000;JW ;********************************************************************************
1150;AD000;JW REMOVE_BLANKS PROC NEAR
1151;AD000;JW
1152;AD000;JW MOV CX, WORD PTR S_MODE_PARM
1153;AD000;JW LEA SI, S_MODE_PARM
1154;AD000;JW INC SI
1155;AD000;JW ADD SI, CX
1156;AD000;JW MOV BX, CX
1157;AD000;JW .WHILE < CX AE 0 >
1158;AD000;JW .IF < <BYTE PTR [SI]> EQ <' '> > OR
1159;AD000;JW .IF < <BYTE PTR [SI]> EQ <','> >
1160;AD000;JW DEC BX
1161;AD000;JW .ELSE
1162;AD000;JW .LEAVE
1163;AD000;JW .ENDIF
1164;AD000;JW DEC SI
1165;AD000;JW DEC CX
1166;AD000;JW .ENDWHILE
1167;AD000;JW MOV WORD PTR S_MODE_PARM, BX
1168;AD000;JW
1169;AD000;JW MOV CX, BX
1170;AD000;JW LEA SI, S_MODE_PARM
1171;AD000;JW ADD SI, 2
1172;AD000;JW MOV DI, SI
1173;AD000;JW .WHILE < CX A 0 >
1174;AD000;JW .IF < <BYTE PTR [SI]> NE <' '>>
1175;AD000;JW .IF < SI NE DI >
1176;AD000;JW MOV AL, [SI]
1177;AD000;JW MOV [DI], AL
1178;AD000;JW .ENDIF
1179;AD000;JW INC DI
1180;AD000;JW .ELSE
1181;AD000;JW DEC BX
1182;AD000;JW .ENDIF
1183;AD000;JW INC SI
1184;AD000;JW DEC CX
1185;AD000;JW .ENDWHILE
1186;AD000;JW MOV WORD PTR S_MODE_PARM, BX
1187;AD000;JW RET
1188;AD000;JW
1189;AD000;JW REMOVE_BLANKS ENDP
1190;********************************************************************************
1191; HANDLE_CODE_DRIVER - Subroutine to process the code page driver parameter
1192; line in the printer profile.
1193;
1194; INPUT:
1195; SI - Points to the beginning of the line to process
1196;
1197; OUTPUT:
1198; S_CP_DRIVER - Filled with the information from the line.
1199;
1200; OPERATION: The line from the file is copied to the S_CP_DRIVER variable.
1201; This variable is assumed to be a maximum of 22 characters wide.
1202;
1203;********************************************************************************
1204HANDLE_CODE_DRIVER PROC NEAR;AN000;
1205
1206 MOV DI, OFFSET S_CP_DRIVER ;AN000; Offset of the variable to load
1207 MOV CX, 22 ;AN000; Maximum width of the field
1208 CALL COPY_LINE ;AN000; Copy the information from the file data
1209 RET ;AN000;
1210
1211HANDLE_CODE_DRIVER ENDP;AN000;
1212
1213;********************************************************************************
1214; HANDLE_CODE_PREPARE - Subroutine to process the code prepare parameter line
1215; in the printer profile.
1216;
1217; INPUT:
1218; SI - Points to the beginning of the line to process
1219;
1220; OUTPUT:
1221; S_CP_PREPARE - Filled with the information from the line.
1222;
1223; OPERATION: The line from the file is copied to the variable S_CP_PREPARE.
1224; The variable is assumed to be a maximum of 12 characters long.
1225;
1226;********************************************************************************
1227HANDLE_CODE_PREPARE PROC NEAR;AN000;
1228
1229 MOV DI, OFFSET S_CP_PREPARE ;AN000; Offset of the variable to load
1230 MOV CX, 12 ;AN000; Maximum length of the variable
1231 CALL COPY_LINE ;AN000; Copy the information from the file data
1232 RET ;AN000;
1233
1234HANDLE_CODE_PREPARE ENDP;AN000;
1235
1236;********************************************************************************
1237; HANDLE_GRAPHICS - Subroutine to process the graphics parameter line in the
1238; printer profile.
1239;
1240; INPUT:
1241; SI - Points to the beginning of the line to process
1242;
1243; OUTPUT:
1244; S_GRAPH_PARM - Filled with the information from the line.
1245;
1246; OPERATION: The line from the file is copied to the S_GRAPH_PARM variable.
1247; The variable is assumed to be a maximum of 20 characters long.
1248;
1249;********************************************************************************
1250HANDLE_GRAPHICS PROC NEAR;AN000;
1251
1252 MOV DI, OFFSET S_GRAPH_PARM ;AN000; Offset of the variable to load
1253 MOV CX, 20 ;AN000; Maximum width of the variable
1254 CALL COPY_LINE ;AN000; Load the variable with the data from the file
1255 RET ;AN000;
1256
1257HANDLE_GRAPHICS ENDP;AN000;
1258
1259;********************************************************************************
1260; COPY_RESULT: Copy the string pointed to in the result block to the specified
1261; destination.
1262;
1263; INPUT:
1264; AX - The maximum length of the string to copy.
1265; DX - The offset in DS of the result block.
1266; DI - The offset of where the string is to be stored
1267;
1268;
1269; OUTPUT:
1270; CX - The length of the string copied.
1271;
1272; Operation: The string is copied from the result block to the area pointed to
1273; by DS:DI. The string is copied until a null character is encountered.
1274;
1275;********************************************************************************
1276COPY_RESULT PROC NEAR;AN000;
1277
1278 PUSH ES ;AN000;
1279 PUSH SI ;AN000;
1280 MOV BX, DX ;AN000; Put address into an index register
1281 LES SI, [BX+4] ;AN000; Get the address of the string to copy
1282 MOV CX, 0 ;AN000; Zero the string length indicator
1283 .WHILE < CX B AX > ;AN000; Copy up to the number of character in AX
1284 MOV DL, BYTE PTR ES:[SI] ;AN000; Get the first byte
1285 .LEAVE < ZERO DL > ;AN000; Terminate loop if this is a null char
1286 MOV BYTE PTR [DI], DL ;AN000; Save character in the destination string
1287 INC SI ;AN000; Increment source pointer
1288 INC DI ;AN000; Increment destination pointer
1289 INC CX ;AN000; Increment number of characters moved
1290 .ENDWHILE ;AN000;
1291 POP SI ;AN000;
1292 POP ES ;AN000;
1293 RET ;AN000;
1294
1295COPY_RESULT ENDP;AN000;
1296
1297;********************************************************************************
1298; COPY_LINE - Copy a line from the printer profile data to a specified area.
1299;
1300; INPUT:
1301; DI - Points to the location the data is to be copied to.
1302; CX - Contains the maximum number of bytes copied.
1303;
1304; OUTPUT:
1305; None.
1306;
1307; OPERATION: The current line being parsed is copied to the specified area.
1308; The length of the line is calculated with the use of the variable
1309; CUR_END_LINE. If the lenght of the line is longer then the number passed
1310; in CX, then only a portion of the line will be copied.
1311;
1312;********************************************************************************
1313COPY_LINE PROC NEAR;AN000;
1314
1315
1316 PUSH SI ;AN000; Save the index regiter used by the parser
1317 PUSH DI ;AN000; Save the pointer to the variable to load
1318 ADD DI, 2 ;AN000; Push pointer passed the lenght word
1319 MOV AX, END_CUR_LINE ;AN000; Get the pointer to the end of this line
1320 SUB AX, SI ;AN000; Get the distance to the end
1321 INC AX ;AN000; Add to get the length of the line
1322 .IF < AX B CX > ;AN000; If length is greater then the maximum allowed,
1323 MOV CX, AX ;AN000; use the shorter length
1324 .ENDIF ;AN000;
1325 PUSH CX ;AN000; Save the length used.
1326 PUSH ES ;AN000; Swap the values in the segment registers
1327 PUSH DS ;AN000;
1328 POP ES ;AN000;
1329 POP DS ;AN000;
1330 CLD ;AN000; Move in the forward direction
1331 REP MOVSB ;AN000; Move the data
1332 POP CX ;AN000; Restore the line length
1333 POP DI ;AN000; Restore the pointer to the variable
1334 MOV WORD PTR ES:[DI], CX ;AN000; Save the length of the string
1335 POP SI ;AN000; Restore the parser pointer
1336 PUSH DS ;AN000; Swap the segment registers again
1337 PUSH ES ;AN000;
1338 POP DS ;AN000;
1339 POP ES ;AN000;
1340 RET ;AN000;
1341
1342COPY_LINE ENDP;AN000;
1343
1344;********************************************************************************
1345; Routine to deallocate the memory used for the storage of the printer profile
1346; data and the table of printer names. These routines also close the profile
1347; file.
1348;********************************************************************************
1349
1350;********************************************************************************
1351; RELEASE_PRINTER_INFO_ROUTINE - Close the printer profile file and free the
1352; allocated memory.
1353;
1354; INPUT:
1355; None.
1356;
1357; OUTPUT:
1358; If CY = 0, There were no error encountered.
1359; If CY = 1, There was an error.
1360; AX = The DOS error code for the deallocate memory function
1361;
1362; OPERATION: Closes the printer file and deallocated the memory.
1363;
1364;********************************************************************************
1365RELEASE_PRINTER_INFO_ROUTINE PROC FAR;AN000;
1366
1367
1368
1369
1370 CALL HOOK_INT_24 ;AN000;
1371
1372
1373 PUSH ES ;AN000;
1374 ;**********************************************************************
1375 ; Close the printer definition file
1376 ;**********************************************************************
1377 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1378 MOV BX, FILE_HANDLE ;AN000; File handle of the profile file
1379 MOV AH, 3EH ;AN000; DOS Fn. for closing a file
1380 DOSCALL ;AN000; Close the file
1381 ;**********************************************************************
1382 ; Deallocate the memory used for the data buffer
1383 ;**********************************************************************
1384 MOV AX, SEG_LOC ;AN000; Location of the data buffer
1385 MOV ES, AX ;AN000;
1386 MOV AH, 49H ;AN000; DOS Fn. for freeing allocated memory
1387 DOSCALL ;AN000; Free the memory
1388 POP ES ;AN000;
1389 CALL RESTORE_INT_24;AN000;
1390 RET ;AN000;
1391
1392RELEASE_PRINTER_INFO_ROUTINE ENDP;AN000;
1393
1394;*******************************************************************************
1395; Routines for changing the SELECT command line in the AUTOEXEC.BAT.
1396;*******************************************************************************
1397
1398;********************************************************************************
1399; CHANGE_AUTOEXEC_ROUTINE: Search a file for a line beginning with SELECT, and
1400; change its parameters.
1401;
1402; INPUT:
1403; DI - The offset of an ASCII-N string containing the file to search.
1404; SI - The offset of an ASCII-N string containing the data to append as
1405; parameters.
1406;
1407; OUTPUT:
1408; None.
1409;
1410; Operation:
1411;
1412;********************************************************************************
1413CHANGE_AUTOEXEC_ROUTINE PROC FAR;AN000;
1414
1415
1416
1417 TEST SEL_FLG,INSTALLRW ;AN000; Is the install
1418 ;AN000; diskette read/write
1419 ;AN000; (has DISKCOPY occurred?)
1420 JNZ AUTO_OK ;AN000;
1421 CLC ;AN000; no error
1422 JMP AUTO_EXIT_RO ;AN000; If not, exit
1423
1424AUTO_OK: ;AN000;
1425 CALL HOOK_INT_24 ;AN000;
1426 PUSH ES ;AN000;
1427 MOV APPEND_POINTER, SI ;AN000; Save the address of the string to be appended
1428 MOV FILENAME, DI ;AN000; Save the address of the string containing the filename
1429 ;**********************************************************************
1430 ; Allocate the memory needed for reading the autoexec file. A maximum
1431 ; of 64K is allocated for use.
1432 ;**********************************************************************
1433 CALL ALLOCATE_MEMORY ;AN000; Allocate the memory needed
1434 .IF < C > ;AN000; Was there an error?
1435 JMP AUTO_EXIT_ERROR ;AN000; Yes! Exit the subroutine
1436 .ENDIF ;AN000;
1437 MOV BUFFER_START, 0 ;AN000; Save the offset of the start of the buffer
1438 COPY_WORD BUFFER_SIZE, SEGMENT_SIZE ;AN000; Save the size of the buffer
1439 ;**********************************************************************
1440 ; Open the input file
1441 ;**********************************************************************
1442 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1443 ; DI contains the address of the filename
1444 CALL POS_ZERO ;AN000; Make the string into an ASCII-Z string
1445 MOV DX, DI ;AN000; Load string offset
1446 ADD DX, 2 ;AN000; Adjust for length word
1447 MOV AX, 3D02H ;AN000; DOS Fn. for opening a file for reading and writing
1448 DOSCALL ;AN000; Open the file
1449 .IF < C > ;AN000; Was there an error?
1450 JMP AUTO_EXIT_ERROR ;AN000; Exit the subroutine
1451 .ENDIF ;AN000;
1452 MOV FILE_HANDLE, AX ;AN000; Save the file handle
1453 ;**********************************************************************
1454 ; Set the file pointer
1455 ;**********************************************************************
1456 MOV WORD PTR FILE_PTR_AT_START[0], 0 ;AN000; Set the file pointer of the data in the buffer
1457 MOV WORD PTR FILE_PTR_AT_START[2], 0 ;AN000; Set the high word
1458 MOV CURRENT_PARSE_LOC, 0 ;AN000; Set the current parsing location
1459 AND READ_FLAG, RESET_EOF ;AN000; Indicate that the end of file has not been reached
1460 ;**********************************************************************
1461 ; Read data into the buffer
1462 ;**********************************************************************
1463 MOV DI, CURRENT_PARSE_LOC ;AN000; Get the current parsing location
1464 CALL READ_FROM_HERE ;AN000; Read data starting from this position
1465 .IF < C > ;AN000; Was there an error?
1466 JMP AUTO_EXIT_ERROR ;AN000; Yes! Exit the subroutine
1467 .ENDIF ;AN000;
1468 ;**********************************************************************
1469 ; Setup the control blocks for the parser
1470 ;**********************************************************************
1471 MOV PAR_EXTEN, OFFSET SELECT_PARMX ;AN000; Address of the parameters extension block
1472 ;**********************************************************************
1473 ; Parse the file for 'SELECT'
1474 ;**********************************************************************
1475PARSE_FOR_SELECT: ;AN000; Here to parse the line
1476 CALL SEARCH_LINE ;AN000; Parse the line.
1477 .IF < C > ;AN000; Was there an error?
1478 JMP AUTO_EXIT_ERROR ;AN000; Yes! Exit the subroutine
1479 .ENDIF ;AN000;
1480 .IF < AX EQ 0 > ;AN000; Did the parser file 'SELECT'?
1481 MOV CURRENT_PARSE_LOC, SI ;AN000; Yes! Save the position after select as parse location
1482 MOV DX, WORD PTR FILE_PTR_AT_START[0];AN000;
1483 MOV CX, WORD PTR FILE_PTR_AT_START[2];AN000;
1484 ADD DX, CURRENT_PARSE_LOC ;AN000;
1485 ADC CX, 0 ;AN000;
1486 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1487 MOV BX, FILE_HANDLE ;AN000;
1488 MOV AX, 4200H ;AN000;
1489 DOSCALL ;AN000;
1490 .IF < C > ;AN000; Was there an error writing the data?
1491 JMP AUTO_EXIT_ERROR ;AN000; Yes! Exit the subroutine
1492 .ENDIF ;AN000;
1493 ;*****************************************************************
1494 ; Write the select parameters to the file
1495 ;*****************************************************************
1496 MOV SI, APPEND_POINTER ;AN000; Address of the string to add to the select line
1497 MOV CX, [SI] ;AN000; Size of the string
1498 MOV DX, SI ;AN000; Get the address again
1499 ADD DX, 2 ;AN000; Adjust pointer past length word
1500 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1501 MOV BX, FILE_HANDLE ;AN000; Get the handle for this file
1502 MOV AH, 40H ;AN000; DOS Fn. number for writing data
1503 DOSCALL ;AN000; Write the data
1504 ;*****************************************************************
1505 ; Write a carrage return and a line feed to the file
1506 ;*****************************************************************
1507 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1508 MOV DX, OFFSET W_CR_LF ;AN000; Address of string to write
1509 MOV CX, E_SIZE_CR_LF ;AN000; Size of the string
1510 MOV BX, FILE_HANDLE ;AN000; Get the file handle
1511 MOV AH, 40H ;AN000; DOS Fn. for writing data
1512 DOSCALL ;AN000; Write the data
1513 ;*****************************************************************
1514 ; Truncate the file at the current file position
1515 ;*****************************************************************
1516 MOV INT_24_ERROR, 0 ;AN000; Indicate that no critical errors have occured yet
1517 MOV CX, 0 ;AN000;
1518 MOV BX, FILE_HANDLE ;AN000;
1519 MOV AH, 40H ;AN000;
1520 DOSCALL ;AN000;
1521 ;*****************************************************************
1522 ; Close the file.
1523 ;*****************************************************************
1524 CALL RELEASE_PRINTER_INFO_ROUTINE ;AN000; Close the original autoexec file
1525 .ELSE ;AN000;
1526 ;*****************************************************************
1527 ; Parse the next line.
1528 ;*****************************************************************
1529 MOV DI, START_NEXT_LINE ;AN000; Get the address of the next line
1530 MOV CURRENT_PARSE_LOC, DI ;AN000; Save this as the current parse location
1531 .IF < CURRENT_PARSE_LOC EQ 0 > ;AN000; If this is zero, then there is no more data
1532 JMP AUTO_EXIT_CLEAR ;AN000; Exit the subroutine - No errors
1533 .ENDIF ;AN000;
1534 JMP PARSE_FOR_SELECT ;AN000; Parse the next line
1535 .ENDIF ;AN000;
1536 JMP AUTO_EXIT_CLEAR ;AN000; Exit the subroutine - No errors
1537
1538AUTO_EXIT_ERROR: ;AN000; Here if there was an error
1539 CALL RELEASE_PRINTER_INFO_ROUTINE ;AN000; Close the original file
1540 STC ;AN000; Indicate that there was an error
1541 JMP AUTO_EXIT ;AN000; Exit the subroutine
1542
1543AUTO_EXIT_CLEAR: ;AN000; Exit here if NO errors.
1544 CLC ;AN000; Indicate there were no errors
1545AUTO_EXIT: ;AN000; Here to exit
1546 CALL DEALLOCATE_MEMORY
1547 POP ES ;AN000; Restore the extra segment
1548 CALL RESTORE_INT_24;AN000;
1549AUTO_EXIT_RO: ;AN000;
1550 RET ;AN000;
1551
1552CHANGE_AUTOEXEC_ROUTINE ENDP;AN000;
1553
1554CODE_FAR ENDS;AN000;
1555
1556END ;AN000;
HIC SVNT DRACONES