/****************************************************************************/
/*                                                                          */
/*	 P e r i p h e r a l  I n t e r c h a n g e  P r o g r a m	    */
/*	 ---------------------------------------------------------	    */
/*									    */
/*         Copyright (c) 1976, 1977, 1978, 1979, 1980, 1981		    */
/*         Digital Research						    */
/*         Box 579							    */
/*         Pacific Grove, CA						    */
/*         93950							    */
/*                                                                          */
/****************************************************************************/

/****************************************************************************/
/*									    */
/*         Revised:							    */
/*            17 Jan 80  by  Thomas Rolander (MP/M 1.1)			    */
/*            05 Oct 81  by  Ray Pedrizetti  (MP/M-86 2.0)		    */
/*            18 Dec 81  by  Ray Pedrizetti  (CP/M-86 1.1)		    */
/*            29 Jun 82  by  Ray Pedrizetti  (CCP/M-86 3.0)		    */
/*	      24 Aug 82  by  Dave Sallume    (Translate to C)		    */
/*	      20 Sep 82  by  Dominic Dunlop  (PCP/M 2.2)		    */
/*                                                                          */
/****************************************************************************/


/****************************************************************************/
/*                                                                          */
/*	Signon message - Please modify version and date with each change    */
/*                                                                          */
/****************************************************************************/

char	signon[] = "Zilog CP/M-Z8000 PIP v1.0A 01/03/84";

/****************************************************************************/
/*                                                                          */
/* Command lines used for command file generation			    */
/*                                                                          */
/*	=== To be supplied later for Z8000-based systems ===		    */
/*                                                                          */
/****************************************************************************/

/****************************************************************************/
/*									    */
/*         W H A T   I T   D O E S   A N D   H O W   I T   W O R K S	    */
/*									    */
/* 1  PIP'S FUNCTION							    */
/*									    */
/*	PIP, the Peripheral Interchange Program, copies data from one	    */
/*	or more peripheral or disk file to another peripheral or disk file. */
/*	It is also able to copy all files matching an ambiguous file name   */
/*	(one containing a wild card such as * or ?) from one disk to	    */
/*	another or from one user number to another.			    */
/*									    */
/*	Finally, PIP can concatenate data from more than one source file    */
/*	and/or device, sending the combined data to a single destination    */
/*	file or device.							    */
/*									    */
/*	While the copy is taking place, PIP can optionally perform checks   */
/*	- such as checking that an Intel Hex format file's checksums are    */
/*	correct, and translations - for example from upper to lower case.   */
/*	There are also facilites for adding line numbers to output and	    */
/*	formatting it into pages for printing.  It is also possible to	    */
/*	specify that only part of a file, delimited by start and end	    */
/*	strings, is copied.						    */
/*									    */
/*	When the destination is a disk file, PIP first copies all the	    */
/*	source data into a temporary file.  Only when the transfer has	    */
/*	completed without errors, and optional verification (if selected)   */
/*	has checked the data, does PIP delete any existing file with the    */
/*	destination file name and rename the temporary file to the	    */
/*	destination name.  This minimizes the possibility that a failing    */
/*	transfer will result in the loss of a backup or older version of    */
/*	the detination file.  In the event that a transfer does fail, PIP's */
/*	temporary file is not deleted in case it contains usable data.	    */
/*									    */
/* 2   PIP'S COMMAND MODES						    */
/*									    */
/*	PIP has two command modes: single and multiple.  In single command  */
/*	mode the user enters details of a single transfer on the command    */
/*	line following the name of the program, PIP.  For example,	    */
/*									    */
/*		A>PIP LST:=MYFILE.LST	(where A> is the CCP prompt)	    */
/*		A>			(prompt from CCP on completion)	    */
/*									    */
/*	copies A:MYFILE.LST to the LST: logical device (normally a printer) */
/*	and returns control to the CCP (Console Command Processor, CP/M's   */
/*	command interpreter) when the operation is complete.  See the next  */
/*	section for details of valid commands.				    */
/*									    */
/*	To enter multiple command mode, the user gives PIP no command line  */
/*	arguments.  In response, PIP prompts (with an asterisk) for	    */
/*	commands, and continues to do this until a blank line is entered,   */
/*	showing that the user has finished with PIP and wishes to return to */
/*	the CCP.  Suppose the user wants to make a backup copy of a file,   */
/*	then print it:							    */
/*									    */
/*		A>PIP			(Run PIP In multiple command mode)  */
/*		*MYFILE.BAK=MYFILE.C	(Make backup copy of a file)	    */
/*		*LST:=MYFILE.C		(Copy file to printer)		    */
/*		*			(User types return only)	    */
/*		A>			(Prompt from CCP)		    */
/*									    */
/*	This sequence of commands is a quicker alternative to running PIP   */
/*	twice in single command mode to achieve the same effect because PIP */
/*	is only loaded from disk once instead of twice.	It also reduces the */
/*	amount of typing required.					    */
/*									    */
/* 3   SOURCES AND DESTINATIONS						    */
/*									    */
/*	PIP knows about three classes of data source or destination:	    */
/*	logical devices, files and disks.				    */
/*									    */
/* 3.1 Logical Devices							    */
/*									    */
/*	The following table lists the logical devices known to the system.  */
/*	These devices are mapped to actual physical devices in CP/M's BIOS  */
/*	(Basic Input/Output System) software.  Many CP/M implementations    */
/*	allow the operator to change the mapping by manipulating a system   */
/*	variable, IOBYTE either with direct operating system calls or with  */
/*	the STAT utility.  MP/M does not have this facility.		    */
/*									    */
/*	Name	| Function		| Src?	| Dst?	| Comments	    */
/*	--------+-----------------------+-------+-------+---------------    */
/*	AXI:	| Auxilliary input	| Yes	| No	| Serial input,	    */
/*		|			|	|	|  tape reader etc. */
/*	AXO:	| Auxilliary output	| No	| Yes	| Serial ouput,     */
/*		|			|	|	|  tape punch etc.  */
/*	CON:	| Console		| Yes	| Yes	| Input is keyboard,*/
/*		|			|	|	|  output is screen */
/*	EOF:	| End of file character | Yes	| No	| Dummy device	    */
/*	INP:	| (User defined input)	| No	| No	| Obsolete: not	    */
/*		|			|	|	|  supported	    */
/*	LST:	| List device		| No	| Yes	| System printer    */
/*	NUL:	| Null trailer for paper| Yes	| No	| Dummy device	    */
/*		|  tape runout		|	|	|		    */
/*	PRN:	| Print on 66 line pages| No	| Yes	| Actually same	    */
/*		|  with line numbers	|	|	|  device as LST:   */
/*	OUT:	| (User defined output) | No	| No	| Obsolete: not	    */
/*		|			|	|	|  supported	    */
/*									    */
/* 3.2 Files								    */
/*									    */
/*	File names come in two forms: unambiguous and ambiguous.  Both have */
/*	the form							    */
/*									    */
/*		d:filename.typ;password					    */
/*									    */
/*		where d:	is an optional disk name.  If missing, the  */
/*				current disk is assumed			    */
/*		      filename  is a 1 to 8 character name consisting of    */
/*				alphabetic, numeric underscore or wildcard  */
/*				characters (* or ?)			    */
/*		      .ext	is an optional file type (1 to 3 of the     */
/*				characters which may appear in filename.)   */
/*				If missing, presumed blank		    */
/*		      password  is a 1 to 8 character password.  If not	    */
/*				given for a file which requires a password, */
/*				PIP prompts the user for one.  Passwords    */
/*				are implemented only in MP/M and CP/M	    */
/*				version 3.0 or later			    */
/*									    */
/*	The difference between unambiguous and ambiguous filenames is that  */
/*	the latter contain one or more wildcard while the former do not.    */
/*	An asterisk anywhere in a filename makes that name match all names. */
/*	A question mark specifies a single "don't care" character.  Similar */
/*	rules apply to file types.					    */
/*									    */
/*	Ambiguous filenames are not allowed as destinations, nor may they   */
/*	appear in or in place of lists of source files to be concatenated.  */
/*	They are used in copying groups of files from one disk or user to   */
/*	another.							    */
/*									    */
/*	Files are held on disk and come in two flavors: ASCII and binary.   */
/*	A control-Z in an ASCII file marks the logical end of the file.	    */
/*	Control-Z has no special significance in a binary file.  In most    */
/*	cases this distinction is unimportant to PIP.  The only time when   */
/*	it needs to know that it is not dealing with an ASCII file is when  */
/*	it is concatenating non-ASCII files (see 4.x below).  The O option  */
/*	(section 5) should be used in this case.			    */
/*									    */
/*	Files may be dense or sparse.  Suppose the last record in a file    */
/*	has logical record number 7.  If 8 physical records (sectors)	    */
/*	(zero through seven) on the disk have been allocated to that file,  */
/*	then the file is dense: there is a physical sector allocated for    */
/*	each logical sector, and the physical size of the file is the same  */
/*	as the logical size.  This is the normal case: files created by the */
/*	editor, object files, command files, and most files created by	    */
/*	programs have this structure.  A sparse file, on the other hand,    */
/*	has fewer physical records than logical records.  Thus a file with  */
/*	8 logical sectors might have as few as one physical sector.  Such   */
/*	files can only be created with the CP/M random write system call,   */
/*	and are typically used by specialized programs such as database	    */
/*	managers and indexed access file handlers.			    */
/*									    */
/*	PIP automatically accomodates both dense and sparse files and	    */
/*	copies only those sectors which are actually allocated in the	    */
/*	source when copying a sparse file.  The resulting destination file  */
/*	is also sparse.  PIP does not allow sparse files to be concatenated.*/
/*									    */
/* 3.3 Disks								    */
/*									    */
/*	A disk name has the form d: where d is a letter from A through P.   */
/*	Disk names are used by PIP as a form of shorthand to cut down on    */
/*	the number of keystrokes needed to achieve a given effect.  In	    */
/*	effect, the disk name stands in for a filename or list of filenames */
/*	which the user has specified elsewhere on the same command line.    */
/*	4.4 and 4.6 below show the two cases where as disk name may be used.*/
/*									    */
/* 4   PIP COMMANDS							    */
/*									    */
/*	The general format of PIP commands is				    */
/*									    */
/*		dest[options]=source1[options],source2[options]...	    */
/*									    */
/*		where dest	is a disk, a logical device or an unambig-  */
/*				uous filename (no wildcards)		    */
/*		      source1	is a disk, a logical device, or an	    */
/*				ambiguous or unambiguous file name	    */
/*		      source2   is a logical device or unabiguous file name */
/*				(there may be more than one, separated by   */
/*				commas)					    */
/*		      options	enclosed in square brackets may appear	    */
/*				after any destination or source		    */
/*									    */
/*	Not all possible combinations are valid.  The remainder of this     */
/*	section details those which are.  For details of valid options, see */
/*	the next section.						    */
/*									    */
/* 4.1 Device to device copy						    */
/*									    */
/*	dst:=src:							    */
/*									    */
/*	copies data from the logical device src: to the logical device	    */
/*	dst:.  Both src: and dst: are three-character logical device names  */
/*	followed by a colon.  Note that a single letter followed by a colon */
/*	is NOT a logical device name, but a disk name (see below.)  For	    */
/*	example,							    */
/*									    */
/*		LST:=AXI:						    */
/*									    */
/*	copies data from the auxiliary input (typically a serial line or    */ 
/*	tape reader) to the list device, typically a printer.		    */
/*									    */
/* 4.2 File to device copy						    */
/*									    */
/*	src:=ufn	(ufn is an unambiguous file name)		    */
/*									    */
/*	copies a single file with an unambiguous name to a destination	    */
/*	device.  For example to print the file PROGRAM.LST,		    */
/*									    */
/*		PRT:=PROGRAM.LST					    */
/*									    */
/* 4.3 Device to file copy						    */
/*									    */
/*	ufn=dst:							    */
/*									    */
/*	copies data from a logical device to a file.  This function is	    */
/*	useful for reading disk files from paper tape and for creating	    */
/*	short text files from the keyboard.  These two functions would be   */
/*	performed by							    */
/*									    */
/*		B:PROGRAM.ASM=AXI:					    */
/*		COMMAND.SUB=CON:					    */
/*									    */
/* 4.4 File to file copy						    */
/*									    */
/*	ufn=ufn	   ufn=d:    d:=ufn					    */
/*									    */
/*	copies one unambiguously named file to another.  For example, to    */
/*	make a backup copy of a file VALUABLE.DAT in VALUABLE.BAK, use	    */
/*									    */
/*		VALUABLE.BAK=VALUABLE.DAT				    */
/*									    */
/*	File attributes and, in the case of CP/M 3.0 and MP/M, extended file*/
/*	information are copied along with the file.  Thus a copy of a read- */
/*	only file is automatically made read only, and a copy of an MP/M    */
/*	file with password protection on write has similar protection.	    */
/*									    */
/*	Special cases of this command can be used to copy an unambiguously  */
/*	named file from one disk to a file of the same name on another	    */
/*	disk.  To copy VALUABLE.DAT on drive A to VALUABLE.DAT on drive B,  */
/*	either								    */
/*									    */
/*		B:VALUABLE.DAT=A:  or  B:=A:VALUABLE.DAT		    */
/*									    */
/*	does the job.  Both are shorter than the long form		    */
/*									    */
/*		B:VALUABLE.DAT=A:VALUABLE.DAT				    */
/*									    */
/* 4.5 Concatenation							    */
/*									    */
/*	dst=src1,src2,...srcn						    */
/*									    */
/*	The commands of 4.1 to 4.4 (except the special cases of 4.4) can    */
/*	be generalized to concatenate data from a variety of sources into a */
/*	single destination file or device.  Each argument is a device	    */
/*	name or unambiguous file name.  PIP reads each source in turn,	    */
/*	copying it to the destination.  For example, to append data from    */
/*	paper tape to an existing file:					    */
/*									    */
/*		BIGGER.SRC=SMALLER.SRC,AXI:				    */
/*									    */
/* 4.6 Multiple file copy						    */
/*									    */
/*	d:=afn    d:[Gn]=afn	(afn is an ambiguous file name)		    */
/*									    */
/*	When an ambiguous filename is used as a source, PIP recognizes that */
/*	it must copy each file matched by the source name to a destination  */
/*	file of the same name, but on a different disk or belonging to a    */
/*	different user (the Gn option specifies user n.)  It is an error to */
/*	try copying files belonging to one user on one disk to the same     */
/*	user on the same disk!  As an example, to copy all .TXT files from  */
/*	the current drive to drive B (which must not be the current drive): */
/*									    */
/*		B:=*.TXT						    */
/*									    */
/*	To copy all files belonging to the current user on drive B to user  */
/*	7 (who must not be the current user) on drive B:		    */
/*									    */
/*		B:[G7]=B:*.*						    */
/*									    */
/* 5   OPTIONS								    */
/*									    */
/*	A list of options enclosed in square brackets may follow any file   */
/*	or device name.  Each option consists of a letter, possibly followed*/
/*	by a decimal number n or a control-Z terminated string s.  Where an */
/*	option requires neither string nor number, any following number or  */
/*	string is misinterpreted as more options.  An error always results. */
/*	A missing number is taken to be 1.  There need be no separators	    */
/*	between options, though spaces are allowed.  Most combinations of   */
/*	options are accepted without objection, although some make little   */
/*	sense and may produce unexpected results.			    */
/*									    */
/*	Any letter is accepted as an option, although some (for example B)  */
/*	have no effect.  The following table lists implemented options	    */
/*	and the context (following source or destination in which they make */
/*	sense:								    */
/*									    */
/*	Opt  | Src | Dst | Description					    */
/*	-----+-----+-----+----------------------------------------------    */
/*	A    | Yes | No  | Copy only those disk files which DO NOT have the */
/*	     |     |	 |  archive bit set in at least one extent	    */
/*	     |	   |	 |  (selective back-up of modified files)	    */
/*	Dn   | Yes | No  | Delete characters after column n (truncate for   */
/*	     |	   |	 |  narrow paper or screen)			    */
/*	E    | Yes | No  | Echo data to console as it is transfered	    */
/*	F    | Yes | No	 | Remove form feeds from data as it is copied	    */
/*	Gn   | Yes | Yes | Specify (Get) user number for source or	    */
/*	     |	   |	 |  destination disk file			    */
/*	H    | Yes | No  | Check that the data is a valid Intel Hex file    */
/*	I    | Yes | No  | Ignore (do not transfer) final :00 record in	    */
/*	     |	   |	 |  Intel Hex file (used for concatenating files)   */
/*	L    | Yes | No  | Translate lower case alphabetic to upper	    */
/*	Nn   | Yes | No  | Prepend line numbers to output data.  Leading 0's*/
/*	     |	   |	 |  not supressed if n=2			    */
/*	O    | Yes | No  | Object file.  Ignore end-of-file marks	    */
/*	Pn   | Yes | No  | Output page eject (form feed) every n lines	    */
/*	     |	   |	 |  (default 60)				    */
/*	Qs   | Yes | No  | Quit (stop) transfering data after the string s  */
/*	     |     |     |  has been copied				    */
/*	R    | Yes | No  | Read system files (system attribute set).  By    */
/*	     |	   |	 |  default such files are not read		    */
/*	S    | Yes | No  | Start transfering data when the string s is	    */
/*	     |	   |	 |  found in input data.  s is first data copied    */
/*	Tn   | Yes | No  | Expand tabs at every n columns (default 8)	    */
/*	U    | Yes | No  | Translate lower case alphabetic to upper	    */
/*	V    | Yes | No  | Check destination disk file for readability (not */
/*	     |	   |	 |  correctness) after transfer complete	    */
/*	W    | Yes | No  | Overwrite read-only destination file (supress    */
/*	     |     |     |  PIP's normal query to user before overwriting)  */
/*	Z    | Yes | No  | Zero parity bit.  Normally parity bit is copied  */
/*									    */
/* 6   HOW IT WORKS							    */
/*									    */
/*	The best way to understand this somewhat knotty program is to start */
/*	at the _main function which is to be found at the end of this	    */
/*	listing and work backwards to progressively lower level functions   */
/*	as and when it becomes necessary to know what they do and how they  */
/*	do it.								    */
/*									    */
/*	For historical reasons, much of the communication between functions */
/*	is accomplished with global variables rather than parameters,	    */
/*	resulting in long-range interdependencies which may be hard to	    */
/*	follow.  A cross-reference listing is useful in tracking these	    */
/*	down.  All the global variables are global because they have to be  */
/*	that way: if you see one, at least two functions use it.	    */
/*									    */
/*					Dominic Dunlop, Zilog Inc. 821022   */
/*									    */
/****************************************************************************/

/****************************************************************************/
/*									    */
/*	   E X T E R N A L   A N D    B D O S   I N T E R F A C E           */
/*	   ------------------------------------------------------	    */
/*									    */
/****************************************************************************/

#include "portab.h"				/* Portable program defs    */
#include "bdos.h"				/* BDOS calls & structures  */
#include "basepage.h"				/* CP/M base page structure */
#include "setjmp.h"				/* Non-local goto	    */

extern BYTE	*sbrk();			/* Memory allocator	    */

struct fcbtab	*fcb;				/* Default file control blk */
char		*buff;				/* Default DMA buffer	    */

char		copyright[] = 
	" (10/04/82) Portable CP/M PIP vers 1.0 ";


/****************************************************************************/
/*                        Version dependencies                              */
/****************************************************************************/

#define	CPM		0x0000			/* Vanilla flavor CP/M	    */
#define MPM		0x1000			/* MP/M			    */
#define PCPM		0x2000			/* Portable CP/M	    */
#define ONE_X		0x00			/* Version 1.x		    */
#define TWO_X		0x20			/* Version 2.x		    */
#define THREE_X		0x30			/* Version 3.x		    */

#define	IS_MPM(x)	(((x) & 0xff00) == MPM)
#define HAS_GET_DFS(x)	((((x) & 0xff00) != CPM) || (((x) & 0xf0) >= THREE_X))
#define HAS_GSET_SCB(x)	(((x) & 0xf0) >= THREE_X)
#define HAS_RETERR(x)	((((x) & 0xff00) == MPM) || (((x) & 0xf0) >= THREE_X))
#define HAS_SETMSC(x)	((((x) & 0xff00) == MPM) || (((x) & 0xf0) >= THREE_X))
#define HAS_XFCBS(x)	((((x) & 0xff00) == MPM) || (((x) & 0xf0) >= THREE_X))
#define VOID_GET_DPB(x)	(((x) & 0xff00) == PCPM)


/****************************************************************************/
/*									    */
/*	           G E N E R A L   D E F I N I T I O N S                    */
/*	           -------------------------------------                    */
/*									    */
/*	NOTE: definitions related to particular data structures appear	    */
/*	      adjacent to the definition of the structure		    */
/*									    */
/****************************************************************************/


/****************************************************************************/
/* Useful charcaters                                                        */
/****************************************************************************/

#define TAB		0x09			/* Horizontal TAB	    */
#define FF		0x0c			/* Form feed		    */
#define	CR		0x0d			/* Carriage return	    */
#define	LF		0x0a			/* Line feed		    */
#define ENDFILE		0x1a			/* CP/M end of file mark    */
#define	WILD		'?'			/* Filename wildcard	    */


/****************************************************************************/
/* Lengths of filename fields                                               */
/****************************************************************************/

#define L_NAME		8			/* Length of filename	    */
#define L_PASS		8			/* Length of password	    */
#define L_TYPE		3			/* Length of file type	    */


/****************************************************************************/
/* Types for source and destination in copy                                 */
/****************************************************************************/

#define	OUTT		0			/* Output device	    */
#define	PRNT		1			/* Printer		    */
#define	LSTT		2			/* List device		    */
#define	AXOT		3			/* Auxilary output device   */
#define	FILE		4			/* File type		    */
#define	CONS		5			/* Console		    */
#define	AXIT		6			/* Auxilary input device    */
#define	INPT		7			/* Input device		    */
#define	NULT		8			/* Null characters	    */
#define	EOFT		9			/* EOF character	    */
#define	ERR		10			/* Error type		    */
#define	DISKNAME 	11			/* Diskname letter	    */



/****************************************************************************/
/* Constants associated with disk layout etc.                               */
/****************************************************************************/

#define C_MAXMBUF	(C_MAXMCNT * SECSIZE)	/* CPM/3 max transfer length*/
#define	C_MAXMCNT	((UWORD) 128)		/* CP/M-3 max multi sec cnt */
#define EXTMSK		~0x7f			/* Ignore low-order bits    */
#define EXTRECS		128			/* Records per extent	    */
#define M_MAXMBUF	(M_MAXMCNT * SECSIZE)	/* CPM/3 max transfer length*/
#define	M_MAXMCNT	((UWORD) 16)		/* MP/M max multi sector cnt*/
#define MP_SHF		8			/* Converts MP/M multi-	    */
						/*   sector return to bytes */
#define SECMSK		~0x7f			/* Ignore low-order bits    */
#define SECSIZE 	128			/* No of bytes in record    */


/****************************************************************************/
/* File attribute fields in FCB                                             */
/****************************************************************************/

#define	F1		fname[0]		/* User flag #1		    */
#define	F2		fname[1]		/* User flag #2		    */
#define	F3		fname[2]		/* User flag #3		    */
#define	F4		fname[3]		/* User flag #4		    */
#define	ASSIGN_PW	fname[5]		/* Assign password	    */
#define NO_WRITE	fname[6]		/* You can't write this file*/
#define USER_0		fname[7]		/* Can be read by all users */
#define R_O		ftype[0]		/* Nobody can write file    */
#define SYSTEM		ftype[1]		/* "Invisible" file	    */
#define ARC		ftype[2]		/* Archived file	    */


/****************************************************************************/
/* Any other business                                                       */
/****************************************************************************/

#define DEF_TAB		8			/* Default tab stops	    */
#define FORCE_READ	0xffff			/* Index causes source read */
#define LPP		60			/* Lines per printer page   */
#define MAXDRIVE	('P' - 'A' + 1)		/* Max valid drive number   */
#define MAXUSER		0xf			/* Max valid user number    */
#define NIBBLE		4			/* Bits in a nibble	    */
#define NONE		0			/* No extended error code   */
#define NULLS		40			/* Length of null trailer   */
#define SAFETY		1024			/* Stack margin in sbrk call*/
#define	SEARFCB		fcb			/* Search fcb in multi copy */


/****************************************************************************/
/*									    */
/*	                 G L O B A L   D A T A                              */
/*	                 ---------------------                              */
/*									    */
/****************************************************************************/


/****************************************************************************/
/* Simple types                                                             */
/****************************************************************************/

BYTE		f1; 				/* F1 user attribute flag    */
BYTE		f2; 				/* F2 user attribute flag    */
BYTE		f3; 				/* F3 user attribute flag    */
BYTE		f4; 				/* F4 user attribute flag    */
BYTE		ro; 				/* Read only attribute flag  */
BYTE		sys; 				/* System attribute flag     */

BOOLEAN		ambig;				/* File is ambig type	    */
BOOLEAN		concat;				/* Concatination command    */
BOOLEAN		dblbuf;				/* Double buffering needed  */
BOOLEAN		dfile;				/* Dest is file type	    */
BOOLEAN		endofsrc;			/* End of source file	    */
BOOLEAN		eretry; 			/* Error return flag	    */
BOOLEAN		fastcopy;			/* Copy directly to dbuf    */
BOOLEAN		getpw;				/* No dst passwd given	    */
BOOLEAN		insparc;			/* In middle of sparse file */
BOOLEAN		made;				/* Dest file already made   */
BOOLEAN		multcom;			/* Handling multiple command*/
BOOLEAN		nendcmd;			/* Not end of command tail  */
BOOLEAN		putnum;				/* Ready for next line num  */
BOOLEAN		sfile;				/* Source is file type	    */
BOOLEAN		sparfil;			/* Sparce file being copied */

char		ch;				/* Last character scanned   */
char		*dbase;				/* Destination buffer base  */
char		*sbase;				/* Source buffer base	    */
						/****************************/
						/* Note: size of buffers     */
						/*   depends on available   */
						/*   memory		    */
						/****************************/

UWORD		bufsize;			/* Multi sector buffer size */
UWORD		cdisk;				/* Current disk 	    */
UWORD		column;				/* Column count for tabs    */
UWORD		concnt;				/* Counter for abort check  */
UWORD		c_user; 			/* Current user number	    */
UWORD		last_user = 0;			/* Remember last user code  */
UWORD		dblen; 				/* Dest buffer length	    */
UWORD		dcnt;				/* Error/directory code	    */
UWORD		exten; 				/* Extended error code	    */
UWORD		feedbase; 			/* String search base	    */
UWORD		feedlen; 			/* Length of search string  */
UWORD		matchlen; 			/* Lenght of matched string */
UWORD		ndest;				/* Index of next dest char  */
UWORD		nsbuf;				/* Next source sector index */
UWORD		nsource;			/* Index of next src char   */
UWORD		odcnt; 				/* Return from open of dest */
UWORD		page_line;			/* Line within page	    */
UWORD		quitlen; 			/* Length of quit string    */
UWORD		sblen; 				/* Source buffer length	    */
UWORD		ver;				/* CP/M version number	    */

long		filsize;			/* File size (24 bits only) */
long		line_no;   			/* Line count on printer    */

/****************************************************************************/
/* Character arrays                                                         */
/****************************************************************************/

						/* Option toggles, one for  */
						/*   each letter (although  */
char		cont[26];			/*   some letters unused)   */

						/****************************/
						/* Functions of elements in */
						/*   cont[].  Most act as   */
						/*   boolean, though some   */
						/*   hold numeric values    */
						/****************************/
#define	ARCHIV		cont[0]			/* File archive		    */
#define	DELET		cont[3]			/* Delete characters	    */
#define	ECHO		cont[4]			/* Echo console characters  */
#define	FORMF		cont[5]			/* Form filter		    */
#define	GETU		cont[6]			/* Get file, user number    */
#define	HEXT		cont[7]			/* Hex file transfer	    */
#define	IGNOR		cont[8]			/* Ignore :00 record on file*/
#define	KILDS		cont[10]		/* Kill filename display    */
#define	LOWER		cont[11]		/* Translate to lower case  */
#define	NUMB		cont[13]		/* Number output lines	    */
#define	OBJ		cont[14]		/* Object file transfer	    */
#define	PAGCNT		cont[15]		/* Page length		    */
#define	QUITS		cont[16]		/* Quit copy		    */
#define	RSYS		cont[17]		/* Read system files	    */
#define	STARTS		cont[18]		/* Start copy		    */
#define	TABS		cont[19]		/* TAB set		    */
#define	UPPER		cont[20]		/* Upper case translate	    */
#define	VERIF		cont[21]		/* Verify equal files only  */
#define	WRROF		cont[22]		/* Write to r/o file	    */
#define	ZEROP		cont[25]		/* Zero parity on input	    */


/****************************************************************************/
/* Standard and extended error messages                                     */
/****************************************************************************/

char	*errmsg[] =				/* Standard messages	    */
	{
		"DISK READ",			/*   0			    */
		"DISK WRITE",			/*   1			    */
		"VERIFY",			/*   2			    */
		"INVALID DESTINATION",		/*   3			    */
		"INVALID SOURCE",		/*   4			    */
		"USER ABORTED",			/*   5			    */
		"BAD PARAMETER",		/*   6			    */
		"INVALID USER NUMBER",		/*   7			    */
		"INVALID FORMAT",		/*   8			    */
		"HEX RECORD CHECKSUM",		/*   9			    */
		"FILE NOT FOUND",		/*  10			    */
		"START NOT FOUND",		/*  11			    */
		"QUIT NOT FOUND",		/*  12			    */
		"INVALID HEX DIGIT",		/*  13			    */
		"CLOSE FILE",			/*  14			    */
		"UNEXPECTED END OF HEX FILE",	/*  15			    */
		"INVALID SEPARATOR",		/*  16			    */
		"NO DIRECTORY SPACE",		/*  17			    */
		"INVALID FORMAT WITH SPARCE FILE",/*18			    */
		"MAKE FILE",			/*  19			    */
		"OPEN FILE",			/*  20			    */
		"PRINTER BUSY",			/*  21			    */
		"CAN'T DELETE TEMP FILE",	/*  22			    */
		"OBSOLETE FEATURE"		/*  23			    */
	};


char	*extmsg[] =				/* Extended error messages  */
	{
		"",				/*   0			    */
		"NON-RECOVERABLE",		/*   1			    */
		"R/O DISK",			/*   2			    */
		"R/O FILE",			/*   3			    */
		"INVALID DISK SELECT",		/*   4			    */
		"INCOMPATIBLE MODE",		/*   5			    */
		"FCB CHECKSUM",			/*   6			    */
		"INVALID PASSWORD",		/*   7			    */
		"ALREADY EXISTS",		/*   8			    */
		"INVALID FILENAME",		/*   9			    */
		"LIMIT EXCEEDED",		/*  10			    */
		"INTERNAL LOCK LIMIT EXCEEDED"	/*  11			    */
	};

#define	NUMMSGS		(sizeof extmsg / sizeof (char *))


/****************************************************************************/
/* Option - transfer type mapping table                                     */
/****************************************************************************/

#define	FAST		0			/* Fast file to file copy   */
#define	CHRT		1			/* Character transfer option*/
#define	DUBL		2			/* Double buffer required   */

char	optype[26] =
	{
		FAST,				/* A option 		    */
		FAST,				/* B option 		    */
		FAST,				/* C option 		    */
		DUBL,				/* D option 		    */
		CHRT,				/* E option 		    */
		DUBL,				/* F option 		    */
		FAST,				/* G option 		    */
		CHRT,				/* H option 		    */
		DUBL,				/* I option 		    */
		FAST,				/* J option 		    */
		FAST,				/* K option 		    */
		CHRT,				/* L option 		    */
		FAST,				/* M option 		    */
		DUBL,				/* N option 		    */
		FAST,				/* O option 		    */
		DUBL,				/* P option 		    */
		DUBL,				/* Q option 		    */
		FAST,				/* R option 		    */
		DUBL,				/* S option 		    */
		DUBL,				/* T option 		    */
		CHRT,				/* U option 		    */
		FAST,				/* V option 		    */
		FAST,				/* W option 		    */
		FAST,				/* X option 		    */
		FAST,				/* Y option 		    */
		CHRT				/* Z option 		    */
	};


/****************************************************************************/
/* Logical device name table                                                */
/****************************************************************************/

#define DEVLEN		3			/* Length of device name    */
#define TYPES		(sizeof io / DEVLEN)	/* Number of devices	    */

char	io[] [DEVLEN] =				/* Logical device names	    */
	{
		'O', 'U', 'T',
		'P', 'R', 'N',
		'L', 'S', 'T',
		'A', 'X', 'O',
		 0,   0,   0,			/* Dummy for file type	    */
		'C', 'O', 'N',
		'A', 'X', 'I',
		'I', 'N', 'P',
		'N', 'U', 'L',
		'E', 'O', 'F',
	};

/****************************************************************************/
/* Structures                                                               */
/****************************************************************************/

jmp_buf		main_stack;			/* Used in error recovery */


/****************************************************************************/
/* Console command buffer                                                   */
/****************************************************************************/

struct	{
		BYTE	maxlen;			/* Max buffer length	    */
		BYTE	comlen;			/* Current length	    */
		char	comline[128];		/* Command buffer contents  */
		UWORD	cbp;			/* Command buffer pointer   */
	} combuf;


/****************************************************************************/
/* File control blocks, expanded to carry password and device type data     */
/****************************************************************************/

struct flctlb
	{
		struct	fcbtab flfcb;
		char	pwnam[L_PASS];
		BYTE	pwmode;
		BYTE	user;
		BYTE	type;
	} source;				/* Source file description  */


struct flctlb	dest;				/* Temporary destination    */
						/*   file (scratch file)    */
struct flctlb	odest;				/* True destination file    */

struct fcbtab	dxfcb;				/* Extended FCB (XFCB) for  */
						/*   destination file	    */


struct flctlb	empty_fcb =			/* Empty for initialization */
	{
		0,				/* Drive, name,		    */
		' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
		' ', ' ', ' ',			/*   type, extent, s1, s2,  */
		0, 0, 0, 0,			/*   record,  reserved,	    */
		0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
		0,				/*   current & random record*/
		' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
		1,				/*   password, passwd mode, */
		0,				/*   user number,	    */
		ERR				/*   file type		    */
	};

/****************************************************************************/
/*									    */
/*	  	    L O W   L E V E L   F U N C T I O N S                   */
/*	            -------------------------------------                   */
/*									    */
/****************************************************************************/

		/********************************/
		/*		 		*/
		/*         G E T C H            */
		/*		 		*/
		/********************************/

#define	getch(a)	(a = gnc())		/*  get a char in a with gnc*/


		/********************************/
		/*		 		*/
		/*           C R L F            */
		/*		 		*/
		/********************************/

VOID						/* Send carriage-return, line*/
crlf()						/*   feed to console	     */
{
	_conout(LF);
	_conout(CR);
}


		/********************************/
		/*		 		*/
		/*         P R I N T X          */
		/*		 		*/
		/********************************/

VOID						/* Print a null-terminated   */
printx(a)					/*   string on the console   */
register char *a;
{
	while (*a)
		_conout(*a++);
}


		/********************************/
		/*		 		*/
		/*          P R I N T           */
		/*		 		*/
		/********************************/

VOID						/* Print a null-terminated  */
print(a)					/*   string on a new line   */
char *a;					/*   on the console	    */
{
	crlf();
	printx(a);
}


		/********************************/
		/*		 		*/
		/*          R D C O M           */
		/*		 		*/
		/********************************/

VOID						/* Read a command line from */
rdcom()						/*   the console into combuf*/
{
	combuf.maxlen = sizeof combuf.comline;	/* 128 characters maximum   */
	_conbuf(&combuf);
}


		/********************************/
		/*		 		*/
		/*          P R N A M E         */
		/*		 		*/
		/********************************/

VOID						/* Print a file name	    */
prname(fcba)
struct fcbtab *fcba;
{
	register int	i, c;
	
	for (i = 0; i < L_NAME + L_TYPE; i++)	/* Do not print spaces	    */
		if ((c = fcba->fname[i] & 0x7f) != ' ')
		{
			if (i == L_NAME)	/* '.' separates name & type*/
				_conout('.');
			_conout(((c<0x20)||(c>0x7e))?'?':c);
		}
}


		/********************************/
		/*		 		*/
		/*           O P E N            */
		/*		 		*/
		/********************************/

UWORD						/* Open a file, using passwd*/
open(fcba)					/*   on MP/M, CP/M 3	    */
struct flctlb	*fcba;				/* Returns error code	    */
{
	if (HAS_XFCBS(ver))			/* If password required,    */
		_setdma(fcba->pwnam);		/*   show where it is	    */
	dcnt = _open(fcba);			/* Try the open		    */
	if ((dcnt != 255)			/* If it worked, but found  */
	   && (fcba->flfcb.USER_0 & 0x80))	/*   a user zero file,	    */
	{					/*   behave as if it failed */
		_close(fcba);
		dcnt = 255;
	}
	exten = dcnt >> 8;			/* Separate low & high bytes*/
	return (dcnt &= 0xff);			/*   of error code	    */
}


		/********************************/
		/*		 		*/
		/*          C L O S E           */
		/*		 		*/
		/********************************/

UWORD						/* Close a file.  Returns   */
close(flcb)					/*   error code		    */
struct flctlb	*flcb;
{
	dcnt = _close(flcb);
	exten = dcnt >> 8;
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*        S E A R C H           */
		/*		 		*/
		/********************************/

UWORD						/* Search for the first file*/
search(flcb)					/*   with a name matching   */
struct flctlb	*flcb;				/*   that in flcb	    */
{						/* Delivers directory record*/
	dcnt = _srch_1st(flcb);			/*   containing match in    */
	exten = dcnt >> 8;			/*   current DMA buffer     */
	return (dcnt &= 0xff);			/* Returns index/error code */
}


		/********************************/
		/*		 		*/
		/*        S E A R C H N         */
		/*		 		*/
		/********************************/

UWORD						/* Search for the next file*/
searchn()					/*   with a name matching   */
{						/*   that set up by search()*/
						/* Delivers directory record*/
	dcnt = _srch_next();			/*   containing match in    */
	exten = dcnt >> 8;			/*   current DMA buffer     */
	return (dcnt &= 0xff);			/* Returns index/error code */
}


		/********************************/
		/*		 		*/
		/*         D E L E T E          */
		/*		 		*/
		/********************************/

UWORD						/* Delete a file, giving    */
delete(flcb)					/*   password if it might   */
struct flctlb	*flcb;				/*   be necessary	    */
{						/* Returns error code	    */
	if (HAS_XFCBS(ver))
		_setdma(flcb->pwnam);
	dcnt = _delete(flcb);
	exten = dcnt >> 8;
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*         D I S K R D          */
		/*		 		*/
		/********************************/

UWORD						/* Read file sequentially  */
diskrd(flcb)					/* Reads no of records set */
struct flctlb	*flcb;				/*   by last call to	   */
{						/*   setmsc(), or 1 if	   */
	dcnt = _s_read(flcb);			/*   function not available*/
	exten = dcnt >> 8;			/* Returns error code	   */
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*      D I S K W R I T E       */
		/*		 		*/
		/********************************/

UWORD						/* Write file sequentially */
diskwrite(flcb)					/* Writes no of records set*/
struct flctlb	*flcb;				/*   by last call to	   */
{						/*   mulsect(), or 1 if	   */
	dcnt = _s_write(flcb);			/*   function not available*/
	exten = dcnt >> 8;			/* Returns error code	   */
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*           M A K E            */
		/*		 		*/
		/********************************/

UWORD						/* Create a new file,	    */
make(fcba)					/*   assigning password if  */
struct flctlb	*fcba;				/*   necessary		    */
{						/* Returns error code	    */
	if (HAS_XFCBS(ver))			/* Password allowed?	    */
	   	if (fcba->pwnam[0] == 0)	/* Yes: wanted?		    */
			fcba->flfcb.ASSIGN_PW &= 0x7f;	/* No		    */
		else				/* Password is wanted	    */
		{
			fcba->flfcb.ASSIGN_PW |= 0x80;
			_setdma(fcba->pwnam);	/* Show where it is	    */
		}
	dcnt = _create(fcba);
	exten = dcnt >> 8;
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*        R E N A M E           */
		/*		 		*/
		/********************************/

UWORD						/* Rename file, giving pass-*/
rename(flcb)					/*   word if it might be    */
struct flctlb 	*flcb;				/*   necessary		    */
{						/* Returns error code	    */
	if (HAS_XFCBS(ver))
		_setdma(flcb->pwnam);		/* Say where password is    */
	dcnt = _rename(flcb);
	exten = dcnt >> 8;
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*         S E T A T T          */
		/*		 		*/
		/********************************/

UWORD						/* Set the attributes of a  */
setatt(flcb)					/*   file (=== assumes pass-*/
struct flctlb	*flcb;				/*   word already set up if */
{						/*   required===)	    */
	dcnt = _set_att(flcb);			/* Returns error code	    */
	exten = dcnt >> 8;
	return (dcnt &= 0xff);
}


		/********************************/
		/*		 		*/
		/*        S E T U S E R         */
		/*		 		*/
		/********************************/

VOID						/* Set the user code	    */
setuser(user)
BYTE	user;
{

	if (last_user != user)			/* Only call BDOS if user   */
		_gset_ucode(last_user = user);	/*   has changed	    */
}


		/********************************/
		/*		 		*/
		/*        M U L T S E C T       */
		/*		 		*/
		/********************************/

VOID						/* Set multisector count    */
multsect(cnt)
UWORD	cnt;
{
	static last_count = 1;			/* Remember last count	    */

	if (! HAS_SETMSC(ver))			/* Do nothing if call not   */
		return;				/*   supported		    */
	if (last_count != cnt)			/* Only call BDOS if new    */
		_setmsc(last_count = cnt);	/*   count differs from last*/
}


		/********************************/
		/*		 		*/
		/*           M O V E            */
		/*		 		*/
		/********************************/

VOID						/* Move n bytes from source */
move(s, d, n)					/*   to destination	    */
register char	*s, *d;
register UWORD	n;
{
	if (!n) return;
	do
		*d++ = *s++;
	while (--n);
}

/****************************************************************************/
/*									    */
/*	              E R R O R   R E P O R T I N G                         */
/*	              -----------------------------                         */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*          E R R O R           */
		/*		 		*/
		/********************************/

error(errtype, exended, retflag, fileadr)	/* Called following errors  */
UWORD		errtype, exended;		/*   which terminate current*/
BOOLEAN		retflag;			/*   command, prints message*/
struct flctlb	*fileadr;			/*   cleans up and returns  */
{						/*   control to main()	    */
	eretry = retflag & ambig;		/* Error retry = retry flag */
	multsect(1);				/* Forget current msc	    */

	if (sfile)				/* If source is a file,	    */
	{					/*   close it		    */
		setuser(source.user);
		close(&source);
	}

	if (made)				/* If destination scratch   */
	{ 					/*   file already created,  */
		setuser(odest.user);		/*   delete it		    */
		close(&dest);
		delete(&dest);			/* Delete dest scratch file */
	}

	print("ERROR: ");			/* Print requested message  */
	printx(errmsg[errtype]);
	if ((exended &= 0x0f) < NUMMSGS)	/*   and extended message if*/
	{					/*   there is one	    */
		_conout(' ');
		printx(extmsg[exended]);
	}
	if (fileadr != 0)			/* If error involves a file,*/
	{					/*   incriminate it	    */
		printx(" - ");
		_conout(fileadr->flfcb.drive + 'A' - 1);
		_conout(':');
		prname(&fileadr->flfcb);
	}

	combuf.comlen = 0;			/* Trash current cmd line   */
	crlf();
	longjmp(main_stack, TRUE);		/* Restart from top of main()*/
}


		/********************************/
		/*		 		*/
		/*  N O N F I L E _ E R R O R   */
		/*		 		*/
		/********************************/

VOID						/* Same as above, but with  */
nonfile_error(errtype)				/*   defaults for all but   */
UWORD errtype;					/*   first parameter	    */
{
	error(errtype, NONE, FALSE, (struct flctlb *) 0);
}

/****************************************************************************/
/*									    */
/*	          F I L E   I N P U T  /  O U T P U T                       */
/*	          -----------------------------------                       */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*      S E T U P D E S T       */
		/*		 		*/
		/********************************/

VOID						/* Set up the destination   */
setupdest()					/*   file		    */
{
	setuser(odest.user = c_user);		/* Set up destination user  */
	dest = odest;				/* Temporary destination    */
	move("$$$", dest.flfcb.ftype, L_TYPE);	/*   has original name but  */
						/*   "$$$" type		    */

	if (HAS_XFCBS(ver))			/* Are we worrying about    */
	{					/*   passwords?		    */
		odest.flfcb.ASSIGN_PW |= 0x80;	/* Yes: tell BDOS	    */
		odcnt = open(&odest.flfcb);	/* Try to open dest file    */
						/*   and save error code    */
		if (odcnt != 255)		/* If it exists, close it   */
			close(&odest);
		else				/* If file exists, but we   */
			if ((exten & 0x0f) != 0)/*   can't open it, error   */
				error(20, exten, TRUE, &odest);

		if ((delete(&dest) == 255)	/* Try to delete old temp   */
		   && (exten != 0))		/*   file.  If it exists but*/
						/*   can't be deleted, error*/
			error(22, exten, TRUE, &dest);

		if (make(&dest) == 255)		/* Create new temp file     */
			error(19, exten, FALSE, &dest);/* Make file error   */
	}
	else					/* No passwords		    */
	{
		delete(&dest);			/* Remove old temp file	    */
		if (make(&dest) == 255)		/* Create a new one	    */
			error(17, NONE, FALSE, &dest);/* No directory space */
	}

	dest.flfcb.record &= 0x00ffffff;	/* Current record is 0	    */
	made = TRUE;				/* Show temp file now made  */
}


		/********************************/
		/*		 		*/
		/*    S E T U P S O U R C E     */
		/*		 		*/
		/********************************/

VOID						/* Prepare to use a source  */
setupsource()					/*   file		    */
{
	register int	i;

	setuser(source.user);			/* Set up source user	    */
	if (HAS_XFCBS(ver))			/* Do we have to worry about*/
		source.flfcb.ASSIGN_PW |= 0x80;	/*   passwords?		    */

	open(&source.flfcb);			/* Open source file	    */
	if ((! RSYS)				/* Do we read system files? */
	   && (source.flfcb.SYSTEM & 0x80))	/* Is this one?		    */
		dcnt = 255;			/* Yes: pretend open failed */

	if (dcnt == 255)			/* Was there an error?      */
						/* Report error, retry if   */
						/*   extended		    */
		error(20, exten, ((exten & 0x0f) != 0), &source);

	if (HAS_XFCBS(ver) && getpw)		/* Did user give dest passwd*/
	{					/* No: get it from source   */
		dxfcb = source.flfcb;	
		if (_get_xfcb(&dxfcb) == 255)	/* Get source file's XFCB   */
			dest.pwnam[0] = 0;	/* Not found: no password   */
		else				/* Has a password	    */
		{ 				/* Get "decrypted" copy	    */
			for (i = 0; i < sizeof dest.pwnam; i++ )
				dest.pwnam[i] =
				  dxfcb.resvd[sizeof dest.pwnam - i - 1] ^
				    dxfcb.s1;
			dest.pwmode = dxfcb.extent;/* Copy password mode    */
		}
	}

	f1 = source.flfcb.fname[0] & 0x80;	/* Save source attributes   */
	f2 = source.flfcb.fname[1] & 0x80;
	f3 = source.flfcb.fname[2] & 0x80;
	f4 = source.flfcb.fname[3] & 0x80;
	ro = source.flfcb.ftype[0] & 0x80;
	sys = source.flfcb.ftype[1] & 0x80;

	_filsiz(&source);			/* Find size of source file */
	filsize = source.flfcb.record & 0xffffff;
	source.flfcb.record = 0;		/* Clear random record no.  */
	nsource = FORCE_READ;			/* Force read from source   */
}						/*   before write to dest   */


		/********************************/
		/*		 		*/
		/*       W R I T E D E S T      */
		/*		 		*/
		/********************************/

VOID						/* Write data from output   */
writedest()					/*   buffer to destination  */
{						/*   file.  On entry, ndest */
	BOOLEAN		dataok;			/*   indexes the byte beyond*/
	register UWORD	j, tdest, n;		/*   the last to be written.*/
	UWORD		chunk;			/* Writes whole sectors only*/

	if (! made)				/* Create output file if not*/
		setupdest();			/*   already done	    */

	if ((n = ndest & SECMSK) == 0)		/* Return if nothing to do  */
		return;

	tdest = 0;				/* Bytes written so far	    */
	setuser(odest.user);			/* Set destination user	    */

	if (sparfil |= insparc)			/* Is this a sparse file    */
	{					/*   (fewer physical than   */
						/*    virtual records)?	    */
		multsect(1);			/* Yes: write one sector at */
		_setdma(&dbase[tdest]);		/*   a time (random record  */
		if (_b_write(&dest) == 255)	/*   addr already set up)   */
			error(1, exten, FALSE, &dest);/* Disk write error   */
	} 
	else					/* Not sparse:		    */
		_set_rand(&dest.flfcb);		/* Set base rec for verify  */

	if (HAS_SETMSC(ver) && fastcopy)	/* Can we write more than   */
	{					/*   on sector at a time?   */
		bufsize = (IS_MPM(ver)) ?	/* Yes.			    */
			  M_MAXMBUF : C_MAXMBUF;
		multsect((IS_MPM(ver)) ? M_MAXMCNT : C_MAXMCNT);
	}
	else					/* No.	Too bad.	    */
	{
		bufsize = SECSIZE;
		multsect(1);
	}

						/* Strange code overcomes   */
						/*   unsigned compare bug   */
	while ((0xffff & (long) (chunk = n - tdest)) >= (long) SECSIZE)
						/* Write loop		    */
	{
		if (HAS_SETMSC(ver)		/* Is this the last chunk in*/
		   && fastcopy			/*   a copy using multiple  */
		   && ((0xffff & (long) chunk) < (long) bufsize))
		{
			bufsize = chunk;	/* Reduce multi sector count*/
			multsect(bufsize / SECSIZE);/* to correct value     */
		}
		
		_setdma(&dbase[tdest]);		/* Adjust DMA start address */

		if (diskwrite(&dest) != 0)	/* Write the data	    */
			error(1, exten, FALSE, &dest);  /* Disk write error */
		tdest += bufsize;
	}

	if (VERIF)				/* Read-after write verify  */
	{					/*   required?		    */
		tdest = 0;			/* Yes: start from the	    */
		multsect(1);			/*   beginning of data just */
		_setdma(buff);			/*   written.  Read one sec */
						/*   at a time into default */
						/*   DMA buffer		    */

		while ((0xffff & (long) tdest) < (long) n)
						/* Verification loop	    */
		{				/* Read random record	    */
			dataok = (_b_read(&dest.flfcb) == 0);
#ifdef HILO
			dest.flfcb.record++;	/* Move to next random rec  */
#else						/*   - just how depends on  */
			dest.flfcb.record += 256;/*  processor byte ordering*/
#endif
						/* Perform comparison	    */
			for (j = 0; j < SECSIZE; j++)
				if (dataok |= (buff[j] == dbase[tdest + j]))
					break;

			tdest += SECSIZE;
			if (! dataok)
				error(2, NONE, FALSE, &dest);/* Verify error*/
		}
		diskrd(&dest);			/* Done: move to next	    */
	}					/*   sequential record	    */

						/* Move unwritten tail down */
						/*   to buffer start	    */
	move(&dbase[tdest], dbase, (UWORD)(BYTE)(ndest -= tdest));
}


		/********************************/
		/*		 		*/
		/*      F I L L S O U R C E     */
		/*		 		*/
		/********************************/

VOID						/* Fill the source buffer   */
fillsource()					/*   from the current source*/
{					        /*   file		    */
	BYTE	extsave;

	if (HAS_SETMSC(ver) && fastcopy)	/* Are we able to read more */
	{					/*   than one sector?	    */
	    bufsize = (IS_MPM(ver)) ?		/* Yes: try to get bufferful*/
			M_MAXMBUF : C_MAXMBUF;	/*   (size depends whether  */
	    multsect((IS_MPM(ver)) ? 		/*    MP/M or CP/M-3)	    */
			M_MAXMCNT : C_MAXMCNT);			
	}
	else					/* No: just get one	    */
	{
	    bufsize = SECSIZE;
	    multsect(1);
	}

	setuser(source.user);			/* Source user number set   */
	nsource = nsbuf;

	while ((0xffff & (long) (sblen - nsbuf)) >= (long) SECSIZE)
						/* Read loop:  exit when    */
	{					/*   buff full or file ends */

	    if (fastcopy			/* Are we filling whole buff*/
	       && ((0xffff & (long) (sblen - nsbuf)) < (long) bufsize))
						/*Is buffer bigger than     */
	    {					/*   remainder of file?	    */
	    					/* If so, decrease count    */
		bufsize = (sblen - nsbuf) & SECMSK;
		multsect(bufsize / SECSIZE);
	    }

	    _setdma(&sbase[nsbuf]);		/* Say where data goes	    */
	    extsave = source.flfcb.extent;	/* Save current extent field*/

	    if (diskrd(&source) == 0)		/* Read.  Was there an error*/
		nsbuf += bufsize;		/* No: tally bytes read	    */
	    else
	    {					/* Error:		    */
		if (dcnt != 1)			/* End of file error?	    */
		    error(0, exten, FALSE, &source);/* Something else: abort*/

						/* End of file: clean up    */
		if (HAS_SETMSC(ver) && fastcopy)/* Add no. sectors copied   */
		    nsbuf += (IS_MPM(ver)) ?
			     (exten >> NIBBLE) * SECSIZE : exten;
	     
						/****************************/
						/*			    */
						/* Following corrects for   */
						/* bug in BDOS by zeroing   */
						/* current record if it has */
						/* a new value of 0x80	    */
						/*			    */
						/****************************/
		if ((source.flfcb.extent != extsave)
		   && ((source.flfcb.record & 0xff000000) == 0x80000000))
		    source.flfcb.record &= 0x00ffffff;

		_set_rand(&source);		/* Get next record number   */
						/* Is this sparse file (less*/
						/*   data than virtual size */
						/*   suggests is in file)?  */
		if (insparc =
#ifdef HILO
		     ((source.flfcb.record & 0xffffff) != filsize))
#else
		     ((source.flfcb.record >> 8) != filsize))
#endif
						/* Yes.  May not be allowed */
		    {if (concat || (! fastcopy))
			error(18, 0, FALSE, &source);
	        } else				/* End of non-sparse file   */
		    close(&source);		/* Flag the fact	    */
		endofsrc = TRUE;
		sbase[nsbuf] = ENDFILE;		/* Plug in end of file mark */
		return;				/* That's all, folks!	    */
	    } ;					/* End of error handling    */
	}					/* End of read loop	    */
}

/****************************************************************************/
/*									    */
/*	       N O N - F I L E   D A T A   H A N D L I N G                  */
/*	       -------------------------------------------                  */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*         P U T D C H          */
		/*		 		*/
		/********************************/

VOID						/* Write the character b to */
putdch(b)					/*   device given by	    */
register int	b;				/*   odest.type		    */
{
	if ((b >= ' ')				/* Tally non-control chars  */
	   && (++column > DELET) && (DELET > 0))/*   in column count.  Take */
		return;				/*   no further action if   */
						/*   beyond right margin    */

	if (ECHO)				/* Need to echo?	    */
		_conout(b);			/* Yes			    */

	switch (odest.type)			/* Send char to right place */
	{
	  case OUTT:				/* OUT: device not supported*/
		nonfile_error(23);
		break;

	  case PRNT:				/* PRN: & LST: same action  */
	  case LSTT:				/*   (tabs expanded for     */
		_lstout(b);			/*    PRN: by putdstc())    */
		break;

	  case AXOT:				/* Auxilliary (punch) output*/
		if (! IS_MPM(ver))
		{
			_punch(b);
		}
		else				/* MP/M does not support    */
			nonfile_error(3);
		break;

	  case FILE:				/* Output is a file	    */
		if (ndest >= dblen)		/* If buffer full, write out*/
			writedest();
		dbase[ndest++] = b;		/* Add char to buffer	    */
		break;

	  case CONS:				/* Console output	    */
		_conout(b);
		break;
	}
}


		/********************************/
		/*		 		*/
		/*        P U T D S T C         */
		/*		 		*/
		/********************************/

VOID						/* Write out destination    */
putdstc(b)					/*   character, expanding   */
char	b;					/*   tabs		    */
{
	register int	i;
 
	if ((b != TAB) || (TABS == 0))		/* Not a tab or not expan-  */
		putdch(b);			/*   ding: just output	    */
	else					/* Expand a tab		    */
	{ 
		i = TABS - (column % TABS);	/* How many spaces needed?  */
		while (i--)
			putdch(' ');
	}
	if (b == CR)				/* Zero column on CR	    */
		column = 0;
}


		/********************************/
		/*		 		*/
		/*        N E W L I N E         */
		/*		 		*/
		/********************************/

VOID
newline()					/* Output a new line number */
{						/*   on a new line (six	    */
	register LONG	factor, number;		/*   digits are printed,    */
	register int	digit;			/*   leading 0's suppressed)*/
	BOOLEAN		zeroprint;

	factor = 1000000;
	number = ++line_no % factor;		/* Truncate to 6 digits	    */
	zeroprint = (NUMB != 1);		/* NUMB always nonzero here */
	while (factor /= 10)			/* Print 6 digit positions  */
	{
		digit = number / factor;	/* Get digit for this place */
		zeroprint |= ((digit != 0)	/* Suppresed leading zero?  */
			     || (factor == 1));
		_conout((zeroprint) ?		/* Print digit or space	    */
			digit + '0' : ' ');
		number %= factor;		/* Discard current place    */
	}
	printx((NUMB == 1) ? ": " : "\t");	/* NUMB value selects	    */
}						/*   separator		    */


		/********************************/
		/*		 		*/
		/*        P U T D E S T         */
		/*		 		*/
		/********************************/

VOID						/* Write a destination	    */
putdest(b)					/*   character, checking    */
int	b;					/*   tabs and newlines	    */
{
	if (FORMF && (b == FF))			/* Ignore form feeds if cmd */
	    return;				/*   option tells us to     */

	if (putnum)				/* New/first line of file   */
	{
	    if (b == FF)			/* Form feed?		    */
		page_line = 0;			/* Start a new page	    */
	    else				/* Not a form feed	    */
	    {
		if (PAGCNT != 0)		/* Page eject selected?	    */
		{ 				/* Yes: end of current page?*/
		    if (++page_line >=
		        ((PAGCNT == 1) ? LPP : PAGCNT))
		    {				/* Yes: behave as if form   */
			page_line = 0;		/*   feed received	    */
			putdstc(FF);
		    }
		}
	    }
	    if (NUMB)				/* Printing line numbers?   */
		newline();			/* Yes			    */
	    putnum = FALSE;			/* New line processing done */
	}
	putdstc(b);				/* Now we can put the char  */
	putnum = (b == LF);			/* Next to go on new line?  */
}


		/********************************/
		/*		 		*/
		/*          U T R A N           */
		/*	    L T R A N		*/
		/*		 		*/
		/********************************/

int						/* Translate character to   */
utran(b)					/*   upper case if it is    */
int	b;					/*   lower case		    */
{
	return ((('a' <= b) && (b <= 'z')) ? b & 0x5f : b);
}

int						/* Translate character to   */
ltran(b)					/*   lower case if it is    */
int	b;					/*   upper case		    */
{
	return ((('A' <= b) && (b <= 'Z')) ? b | 0x20 : b);
}


		/********************************/
		/*		 		*/
		/*        G E T S R C C         */
		/*		 		*/
		/********************************/

int						/* Gets a character from the*/
getsrcc()					/*   current source device  */
{
	int	b;
	BOOLEAN conchk;

	conchk = TRUE;				/* Console status chk below */
	switch (source.type)			/* Get data from current src*/
	{
	  case OUTT:				/* These devices are not    */
	  case PRNT:				/*   valid sources	    */
	  case LSTT:
	  case AXOT:
		nonfile_error(4);
		break;

	  case FILE:				/* Source is a file	    */
		if (nsource >= sblen)		/* Is source buffer empty?  */
		{
			if (dblbuf || (! dfile))/* If source & dest buffers */
						/*   separate, or dest not a*/
				nsbuf = 0;	/*   file, just clear index */
			else			/* Source buff is dest buff:*/
			{			/* Empty it unless read from*/
						/*   first read from source */
				if (nsource != FORCE_READ)
					writedest();
					nsbuf = ndest;
			}
			fillsource();		/* Fill source buffer	    */
		}
		b = sbase[nsource++];		/* Get a character	    */
		break;

	  case CONS:				/* Source is console	    */
		conchk = FALSE;			/* Don't chk console status */
		b = _conin();
		break;

	  case AXIT:				/* Auxiliary input	    */
		if (IS_MPM(ver))		/* MP/M doesn't have one    */
			nonfile_error(4);
		b = _reader() & 0x7f;		/* Not MP/M: get character  */
		break;

	  case INPT:				/* User-defined input: not  */
		nonfile_error(23);		/*   supported		    */
	}

	if (conchk)				/* Check if user wants to   */
	{					/*   end transfer	    */
						/* On object files, check   */
						/*   every 256 bytes, on    */
						/*   ASCII every line	    */
		conchk = (OBJ) ? ((++concnt & 0xff) == 0) : (b == LF);

		if (conchk && _constat())	/* Did user enter character */
		{				/* If end of file, pretend  */
			if (_conin() == ENDFILE)/*   it came from source    */
				return (ENDFILE);
			nonfile_error(5);	/* Not ENDFILE: user abort  */
		}
	}

	if (ZEROP)				/* Clear parity bit if	    */
		b &= 0x7f;			/*   necessary		    */
	if (UPPER)				/* Return character, trans- */
		return (utran(b));		/*   lated to upper or lower*/
	return ((LOWER) ? ltran(b) : b);	/*   case if requested	    */
}


		/********************************/
		/*		 		*/
		/*           M A T C H          */
		/*		 		*/
		/********************************/

BOOLEAN						/* Match start, quit strings*/
match(b, ch)					/*   (used in transferring  */
int	b;					/*   that part of a file    */
int	ch;					/*   between delimiter pair)*/
{						/* b indexes start of match */
	int	c;				/*   string in command buff */
						/* ch is current char in    */
						/*  file, not cmd line.     */
						/* Have we reached end of   */
						/*   match string?	    */

	if ((c = combuf.comline[b += matchlen]) == ENDFILE
	    || c == ']' || c == CR )		/* Allow ] or CR to end str */
	{ 					/* Yes: success!  Save char */
		combuf.comline[b] = ch;		/*   for output following   */
		return (TRUE);			/*   match string, return   */
	}

	if (c == ch)				/* OK so far?		    */
		matchlen++;
	else
		matchlen = 0;

	return (FALSE);				/* No cigar (so far)	    */
}


		/********************************/
		/*		 		*/
		/*         G E T S R C          */
		/*		 		*/
		/********************************/

char						/* Get next source character*/
getsrc()					/* May be from source device*/
{						/*   or from start match    */
	int	c;				/*   string.  Skips chars   */
						/*   before start match or  */
						/*   after end match	    */

	if (quitlen > 0)			/* This has the effect of   */
						/*   generating CR, LF,	    */
						/*   ENDFILE after end match*/
	    return (--quitlen == 1) ? LF : ENDFILE;/* (see below)	    */

	FOREVER					/* Until start string found */
	{					/*   (if user specified one)*/
	    if (feedlen > 0) {			/* Start string just found: */
		 				/*   return character from  */
		feedlen--;			/*   matching sequence	    */
		return (combuf.comline[feedbase++]);
	    }
	    if ((c = getsrcc()) == ENDFILE)	/* If source char is ENDFILE*/
		return (ENDFILE);		/*   look no further	    */

	    if (STARTS > 0)			/* Looking for start string?*/
	    {
		if (match(STARTS,c))		/* Complete match?	    */
		{				/* Yes: we're in business!  */
		    feedbase = STARTS;		/* Arrange for output of    */
		    feedlen = matchlen + 1; 	/*   matching sequence	    */
		    STARTS = matchlen = 0;	/* Show start found and not */
		    				/*   searching for start    */
		}
		continue;			/* Back to FOREVER	    */
	    }
	    					/* No interest in start	    */

	    if ((QUITS > 0)			/* Looking for quit string? */
	       && match(QUITS,c))		/* Complete match?	    */
	    {					/* Yes: arrange for CR, LF  */
		QUITS = 0;			/*   ENDFILE to be returned */
		quitlen = 2;			/*   by this and next two   */
		return (CR);			/*   calls		    */
	    }
	    else				/* Character of no special  */
		return (c);			/*   interest: deliver it   */
	}					/* End of FOREVER	    */
}


		/********************************/
		/*		 		*/
		/*         R D _ E O F          */
		/*		 		*/
		/********************************/

BOOLEAN						/* Get a character, return  */
rd_eof()					/*   TRUE if end of file    */
{
	ch = getsrc();				/* On an object file, last  */
	if (OBJ)				/*   byte in last bufferful?*/
		return (endofsrc && (nsource > nsbuf));

	return (ch == ENDFILE);			/* On ASCII, is char ENDFILE*/
}

/****************************************************************************/
/*									    */
/*     F U N C T I O N S   H A N D L I N G   I N T E L   H E X   D A T A    */
/*     -----------------------------------------------------------------    */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*          C K H E X           */
		/*		 		*/
		/********************************/

int						/* Check that a is a valid  */
ckhex(a)					/*   hex digit.  If it is   */
int a;						/*   return corresponding   */
{						/*   4-bit value	    */
	if (('0' <= a) && (a <= '9'))
		return (a - '0');
	if (('A' <= a) && (a <= 'F'))
		return (a - 'A' + 0xa);
	error(13, 0, FALSE, &source);		/* Invalid hex digit: abort */
}


		/********************************/
		/*		 		*/
		/*      H E X R E C O R D       */
		/*		 		*/
		/********************************/

VOID						/* Transfer a whole file in */
hexrecord()					/*   Intel hex format,	    */
{						/*   validating  checksums  */
	BOOLEAN	zerorec, inrec;
	UWORD	length, count;
	BYTE	byte;
	int	chr, lastchr;
	UWORD	checksum;

	zerorec = inrec = FALSE;		/* Not last record in file, */
						/*   not inside record	    */

	while ((chr = getsrc()) != ENDFILE)	/* Transfer data until end  */
	{					/*   of file reached	    */
	    if (! inrec)  			/* Perform no checks on data*/
	    {					/*   outside records	    */
		if (inrec = (chr == ':'))	/*Record start?	    */
		    checksum = count = 0;
		else				/* Not record start: copy to*/
		    putdest(chr);		/*   dest		    */
		continue;			/* Back to while...	    */
	    }
						/* Inside a record	    */

	    if (++count & 1)			/* Odd numbered chars are   */
	    {					/*   high nibble of byte.   */
		lastchr = chr;			/* Save for next time around*/
		continue;			/* Go get next character    */
	    }
	    					/* Even numbered char:	    */
	    					/*   assemble a byte	    */
	    byte = (ckhex(lastchr) << 4) + ckhex(chr);	
	    checksum += byte;			/* Tally in checksum	    */

	    if (count == 2)			/* Record length	    */
	    {
		length = 10 + (byte * 2);	/* Calculate character count*/

		if (! ((zerorec = (byte == 0))	/* If this is not an ignored*/
		      && IGNOR))		/*   final record, transfer */
		{				/*   byte count to dest	    */
		    putdest(':');
		    putdest(lastchr);
		}
	    }
	    else				/* Checksum at record end?  */
	    {
		if (count == length)		/* Yes: low 8 bits of our   */
		{				/*   checksum should be zero*/
		    if ((checksum & 0xff) != 0)	/* Error if not		    */
			error(9, NONE, FALSE, &source);
		    else
			inrec = FALSE;		/* No longer in record	    */
		}
	    }
		
	    if (! (zerorec && IGNOR))		/* Unless an ignored final  */
		putdest(chr);			/*   record has been found, */
	}					/*   transfer character     */

	if (inrec || (! zerorec))	    	/* End of file.  Expected?  */
	    error(15, NONE, FALSE, &source);	/* Error if not		    */
}

/****************************************************************************/
/*									    */
/*	  S T A R T ,   E N D   O F   F I L E   F U N C T I O N S           */
/*	  -------------------------------------------------------           */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*     C K _ S T R I N G S      */
		/*		 		*/
		/********************************/

VOID						/* Complain if start or end */
ck_strings()					/*   string not found in    */
{						/*   source data	    */
	if (STARTS > 0)				/* Looking for start, but   */
		nonfile_error(11);		/*   didn't find it?	    */
	if (QUITS > 0)				/* Similarly for end...	    */
		nonfile_error(12);
}


		/********************************/
		/*		 		*/
		/*      C L O S E D E S T       */
		/*		 		*/
		/********************************/

VOID						/* Close the destination    */
closedest()					/*   file, flushing buffer  */
{						/*   & renaming scratch file*/
	ck_strings();				/* Started, ended OK?	    */

	while ((ndest % SECSIZE) != 0)		/* Fill to end of final     */
	    putdest(ENDFILE);			/*   sector with ENDFILE    */
	writedest();				/* Flush buffer		    */

	setuser(odest.user);			/* Set up destination user  */
	close(&dest);				/* Close scratch file	    */
	if (dcnt == 255)
	    error(14, exten, TRUE, &dest);	/* Can't close file!	    */

	if (! HAS_XFCBS(ver)			/* If we have not done so   */
	   && ((odcnt = open(&odest)) != 255))	/*   already, find out if   */
	    close(&odest);			/*   true dest file exists  */

	if (odcnt != 255)			/* File exists		    */
	{
	    if ((odest.flfcb.R_O & 0x80)	/* Is it read only and if so*/
	       && (! WRROF))			/*   do we want to know?    */
	    {					/* Yes: pass buck to user   */
		while ((dcnt != 'Y') && (dcnt != 'N'))
		{
		    print ("DESTINATION IS R/O, DELETE (Y/N)?");
		    dcnt = utran((int) _conin());
		}
		if (dcnt == 'N')		/* User doesn't want file   */
		{				/*   deleted		    */
		     print("**NOT DELETED**");	/* Confirm wise decision    */
		     crlf();
		     delete(&dest);		/* Delete temp file and exit*/
		     return;
		}
		crlf();
	    }

	    odest.flfcb.R_O &= 0x7f;		/* OK to delete old dest    */
	    odest.flfcb.SYSTEM &= 0x7f;		/*   file: clear attributes */
	    setatt(&odest);			/*   so it can be deleted   */
	    delete(&odest);
	}
						/* Rename the temporary dest*/
						/*   file (replace $$$ type)*/
	move((char *) &odest.flfcb, dest.flfcb.resvd, 16);
	rename(&dest);
						/* Set dest attributes same */
						/*   as source		    */

	odest.flfcb.F1 = (odest.flfcb.F1 & 0x7f) | f1;
	odest.flfcb.F2 = (odest.flfcb.F2 & 0x7f) | f2;
	odest.flfcb.F3 = (odest.flfcb.F3 & 0x7f) | f3;
	odest.flfcb.F4 = (odest.flfcb.F4 & 0x7f) | f4;
	odest.flfcb.USER_0 &=  0x7f;
	odest.flfcb.R_O = (odest.flfcb.R_O & 0x7f) | ro;
	odest.flfcb.SYSTEM = (odest.flfcb.SYSTEM & 0x7f) | sys;
	odest.flfcb.ARC &= 0x7f;
	setatt(&odest);

	if (ARCHIV)				/* Should we archive source */
	{ 					/* Yes:			    */
		setuser(source.user);
		source.flfcb.ftype[2] |= 0x80;
		source.flfcb.extent = 0;
		setatt(&source);
	}
}


		/********************************/
		/*		 		*/
		/*    S I Z E _ M E M O R Y     */
		/*		 		*/
		/********************************/

VOID						/* Allocate space for the  */
size_memory()					/*   source and destination*/
{						/*   buffers		   */
	UWORD		freespace;
	static UWORD	allocated = 0;
	static BYTE	*base;

	if (! allocated)			/* First time through, grab*/
	{					/*   as much memory as we  */
		base = sbrk(0);			/*   can (even multiple of */
						/*   SECSIZE)		   */
		allocated = (((BYTE *) &freespace - base) - SAFETY) &
			    (SECMSK  << 1);
		if (sbrk(allocated) == (BYTE *) -1)
		{
			print("Can't allocate memory");
			_exit(1);
		}
	}

	if (dblbuf)				/* Are two buffers needed?  */
	{					/* Yes: divide the available*/
		sblen = dblen = allocated / 2;	/*   space equally	    */
		dbase = (char *) base;	
		sbase = (char *) base + dblen;
		if (ndest >= dblen) writedest(); 
		nsbuf = 0;
	}
	else					/* Just one buffer	    */
	{
		sblen = dblen = allocated;
		sbase = dbase = (char *) base;
	}
}


		/********************************/
		/*		 		*/
		/*       S E T U P E O B        */
		/*		 		*/
		/********************************/

VOID						/* Finds the first ENDFILE  */
setupeob()					/*   in the last sector of  */
{						/*   the source file just   */
	register int	i;			/*   read and adjusts nsbuf */
						/*   to index the character */

	if (OBJ)				/* No-op for object files   */
		return;

	nsbuf -= SECSIZE + 1;			/* Index char before last   */
	for (i = 0; i < SECSIZE; i++)		/*   sector and examine a   */
		if (sbase[++nsbuf] == ENDFILE)	/*   sector's worth of data */
			return;
	nsbuf++;				/* Point beyond last sector */
}


		/********************************/
		/*		 		*/
		/*       C H K R A N D O M      */
		/*		 		*/
		/********************************/

VOID						/* Find and read the next   */
chkrandom()					/*   record containing data */
{						/*   in a sparse file (file */
	BYTE	current;			/*   where not all records  */
						/*   contain data)	    */

	setuser(source.user);			/* Set up source user	    */
	_set_rand(&source);			/* Set up record number	    */
	multsect(1);				/* Only read one record     */
	_setdma(buff);				/*   into default buffer    */

	FOREVER					/* Until record containing  */
	{					/*   data found		    */
	    switch ((int) _b_read(&source))	/* Data in this record?     */
	    {					/* Yes: copy record no to   */
	      case 0:				/*   destination FCB (do not*/
						/*   disturb current record)*/
		current = ((BYTE *) &dest.flfcb.record)[0];
		dest.flfcb.record = source.flfcb.record;
		((BYTE *) &dest.flfcb.record)[0] = current;
		endofsrc = FALSE;
		return;				/* Mission accomplished     */

	      case 1:				/* No data in this record:  */
#ifdef HILO					/*   go to next (just how   */
		source.flfcb.record++;		/*   depens on byte order)  */
#else
		source.flfcb.record += 0x100;
#endif
		break;

	      case 4:				/* No data in this extent!  */
#ifdef HILO					/* Move to the next (again, */
						/*   method byte order      */
						/*   dependent)		    */
		source.flfcb.record = (source.flfcb.record + EXTRECS) &
					EXTMSK;
#else
		source.flfcb.record = (source.flfcb.record + (EXTRECS << 8)) &
					((EXTMSK << 8) & 0xff);
#endif
		break;

	      default:				/* Something went wrong: say*/
		error(0, NONE, FALSE, &source); /*   its a disk read error  */
	    }
	}
}

/****************************************************************************/
/*									    */
/*		 D A T A   C O P Y I N G   F U N C T I O N S                */
/*	         -------------------------------------------                */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*     S I M P L E C O P Y      */
		/*		 		*/
		/********************************/

VOID						/* Copy a single input to  */
simplecopy()					/*   an output (concaten-  */
{						/*   ation handled in	   */
	register int	i;			/*   _main function!)	   */

	fastcopy = (sfile && dfile);		/* Is this file-file copy? */
	endofsrc = dblbuf = sparfil = FALSE;	/* Set initial conditions  */

	for (i = 0; i < sizeof cont; i++)	/* Check options which     */
	{					/*   affect copy method    */
	    if (cont[i]) {
	        switch(optype[i])
		    {
		      case CHRT:		/* Character by character  */
			fastcopy = FALSE;
			break;

		       case DUBL:		/* May need double buffer  */
			dblbuf = (sfile && dfile);
			fastcopy = FALSE;
			break;
		}
	    }
	}

	size_memory();				/* Set up buffers	    */
	if (sfile)				/* Open source if it is a   */
	    setupsource();			/*   file		    */

						/* Now ready to do copy	    */
	if (fastcopy)				/* Quick file-file copy?    */
	{
	    while (! endofsrc)			/* Read the whole source    */
	    {
		fillsource();			/* Fill source buffer	    */
		if (endofsrc && concat)		/* End of source file?      */
		{
		    setupeob();			/* Find true end of file    */
		    ndest = nsbuf;
		    if (nendcmd)		/* More to concatenate?     */
			return;			/* Yes: don't flush buffer  */
		}
		ndest = nsbuf;
		writedest();			/* Write buffer out to	    */
		nsbuf = ndest;			/*   scratch file	    */
		if (endofsrc && insparc)	/* If this has turned out to*/
		    chkrandom();		/*   be sparse file, move to*/
	    }					/*   next record containing */
	}					/*   data		    */
	else					/* Character by character   */
	{
	    if (HEXT || IGNOR)			/* Transfer Intel hex data  */
		hexrecord();
	    else
		while (! rd_eof())		/* Copy characters between  */
		    putdest(ch);		/*   start & end strings    */

	    if (concat && nendcmd)		/* End of file: more to come*/
	    {					/* Yes: mark buffer, but    */
		nsbuf = ndest;			/*   don't wrap up yet      */
		return;
	    }
	}

						/* All done:		    */
	if (dfile)				/* If destination is a file,*/
	    closedest();			/*   close it		    */
}


		/********************************/
		/*		 		*/
		/*          A R C H K           */
		/*		 		*/
		/********************************/

BOOLEAN						/* Check if archive bit is  */
archck()					/*   clear in any extent of */
{						/*   source file (used by   */
						/*   [A] option in deciding */
						/*   which files to copy)   */
						/* Returns TRUE if file NOT */
						/*   archived		    */
	if (! ARCHIV)				/* Only check if option	    */
		return (TRUE);			/*   selected		    */

	setuser(source.user);			/* Set up source user	    */
	source.flfcb.extent = WILD;		/* Look for all extents of  */
	search(&source);			/*   the source file	    */

	while (dcnt != 255)			/* While more extents	    */
	{					/* Copy name from directory */
		move(&buff[((dcnt & 3) * 32) + 1], source.flfcb.fname, 15);

		if (! (source.flfcb.ARC & 0x80))/* Is archive bit clear?    */
			return (TRUE);
		searchn();			/* No, it's set: try again  */
	}
	return (FALSE);				/* All extents archived	    */
}


		/********************************/
		/*		 		*/
		/*      N E X T _ F I L E       */
		/*		 		*/
		/********************************/

/****************************************************************************/
/* NOTE: This function could be made much more efficient if it were         */
/*       rewritten to use _gset_scb() to save and restore search context    */
/*       between calls if BDOS has CP/M 3.0 features                        */
/****************************************************************************/

int						/* Find the first extent of */
next_file(beyond)				/*   next file after direct-*/
int beyond;					/*   ory entry indexed by   */
{						/*   beyond which matches   */
	register int	ndcnt;			/*   the name in SEARFCB.   */
						/* Returns new beyond value */
	setuser(source.user);			/* Set up source user	    */
	_setdma(buff);				/* Get directory record into*/
	SEARFCB->extent = 0;			/*   default DMA buffer     */
	search(SEARFCB);
	ndcnt = 0;
	while ((dcnt != 255)			/* Find the match requested */
	      && (ndcnt++ < beyond))
		searchn();
	
	if (dcnt != 255)			/* Copy name from directory */
	{					/*   to source & dest FCB's */

		move(&buff[((dcnt & 3) * 32) + 1], odest.flfcb.fname, 15);
		move(odest.flfcb.fname, source.flfcb.fname, 15);
	}

	return(ndcnt);				/* Return index to match    */
}


		/********************************/
		/*		 		*/
		/*       M U L T C O P Y        */
		/*		 		*/
		/********************************/

VOID						/* Copy mutiple files to a  */
multcopy()					/*   a named drive or user  */
{
	int	nextdir, ncopied;

	if (! eretry)				/* Unless retrying following*/
	    nextdir = ncopied = 0;		/*   error, clear counters  */

	FOREVER					/* Until no more matches    */
	{
	    nextdir = next_file(nextdir);	/* Find a file to copy	    */

	    if (dcnt == 255)			/* No more files?	    */
	    {
		if (ncopied == 0)		/* No matches at all?	    */
		    error(10, 0, FALSE, SEARFCB);/* File not found	    */

		if (! KILDS)			/* Terminate list of files  */
		    crlf();

		return;				/* All done		    */
	    }

						/* We have a filename match */
	    if (! archck())			/* Ignore it if archived and*/
		continue;			/*   A option in force	    */

	    if ((odest.flfcb.SYSTEM & 0x80)	/* Ignore if a system file  */
	       && ! RSYS)			/*   and not allowed to copy*/
		continue;

	    made = FALSE;			/* Destination file not made*/
						/* Start from first extent  */
	    odest.flfcb.extent = source.flfcb.extent = 0;

	    if (! KILDS)			/* Need to print its name?  */
	    { 
		if (ncopied == 0)		/* Print heading first time */
		    print("COPYING -");

		crlf();
		prname(&odest.flfcb);
	    }

	    ncopied++;				/* We have a file to copy   */
	    simplecopy();			/* Do the copy		    */
	}
}

/****************************************************************************/
/*									    */
/*	       C O M M A N D   P A R S I N G   F U N C T I O N S            */
/*	       -------------------------------------------------            */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*        C K _ D I S K         */
		/*		 		*/
		/********************************/

ck_disk()					/* Abort if source and dest */
{						/*   disks, source and dest */
	if ((odest.user == source.user)		/*   users the same	    */
	   && (odest.flfcb.drive == source.flfcb.drive))
		nonfile_error(8);
}


		/********************************/
		/*		 		*/
		/*            G N C             */
		/*		 		*/
		/********************************/

int						/* Get next character from  */
gnc()						/*   command line or CR at  */
{						/*   end of line	    */
						/* Also translates returned */
						/*   value to upper case.   */
	return ((++combuf.cbp >= (combuf.comlen & 0xff)) ?
		CR : (utran(combuf.comline[combuf.cbp])));
}


		/********************************/
		/*		 		*/
		/*         D E B L A N K        */
		/*		 		*/
		/********************************/

VOID						/* Skip until non-blank     */
deblank()					/*   command line character */
{
	if (ch == CR) return;
	while (getch(ch) == ' ') ;
}


		/********************************/
		/*		 		*/
		/*         C K _ E O L          */
		/*		 		*/
		/********************************/

VOID						/* Complain if further input*/
ck_eol()					/*   follows a complete cmd */
{
	deblank();
	if (ch != CR)
		nonfile_error(8);
}


		/********************************/
		/*		 		*/
		/*       D E L I M I T E R      */
		/*		 		*/
		/********************************/

BOOLEAN						/* Return TRUE if the curent*/
delimiter(c)					/*   character is delimiter */
int	c;
{
	static char	del[] = "* =.:;,!=\r<[]";
	register int	i;

	for (i = 0; i < sizeof del - 1; i++)
		if (c == del[i])
			return (TRUE);
	return (FALSE);
}


		/********************************/
		/*		 		*/
		/*         A _ T O _ I          */
		/*		 		*/
		/********************************/

UWORD						/* Convert ASCII to decimal */
a_to_i()					/* Returns result	    */
{
	register UWORD	decimal;

	decimal = 0;
	while (('0' <= getch(ch))		/* Until non-digit found    */
	      && ((ch) <= '9'))
		decimal = 10 * decimal + (ch - '0');

	combuf.cbp--;				/* "Push back" terminator   */
	return (decimal);
}


		/********************************/
		/*		 		*/
		/*       S C A N _ P A R        */
		/*		 		*/
		/********************************/

VOID						/* Scan option parameters   */
scanpar(fcba)					/*   enclosed in square     */
struct flctlb *fcba;				/*   brackets		    */
{
	register int	usr;
	register int	n;			/* Int returned by a_to_i() */
	char		chsave;			/* Because of C side-effect */
						/* crock - see a_to_i call. */
	while ((getch(ch) != CR)
	      && (ch != ']'))
	{
	    if ((ch = utran(ch))  == ' ')	/* Skip spaces between	    */
		continue;			/*   options		    */

	    if (!(('A' <= ch) && (ch <= 'Z')))	/* Non-alpha option?	    */
		nonfile_error(6);		/* Yes: error		    */

	    cont[ch - 'A'] = 1;			/* Show option selected     */

	    switch (chsave = ch)		/* Check for modifiers after*/
	    {					/*   option		    */
	      default:				/* D, N, P, T take an intgr */
		if( (n = a_to_i()) != 0)	/*  arg (optional w/ N.)    */
		    cont[chsave - 'A'] = n;	/* Plug in value (note lack */
		break;				/*   of range check)	    */
						/* NOTE: a_to_i() steps on  */
						/* the global variable "ch",*/
						/* and the subscript is eval*/
						/* uated after the call.    */
	      case 'G':				/* Get user number	    */
		if ((usr = a_to_i()) > MAXUSER)	/* Complain if invalid user */
		    nonfile_error(6);
		
		fcba->user = usr;		/* Plug user no. into FCB   */
		break;
	
	      case 'Q':				/* Start or quit string:    */
	      case 'S':				/* Put string index in	    */
		cont[ch - 'A'] = combuf.cbp + 1;/*   option buffer	    */

		while ((n = gnc()) != ENDFILE
			&& n != ']' && n != CR);/* Skip string		    */
		break;
	    }
	}
}


		/********************************/
		/*		 		*/
		/*           T O K E N          */
		/*		 		*/
		/********************************/

int						/* Finds the length of the  */
token()						/*   next command token,    */
{						/*   that is the number of  */
	register int	len;			/*   chars, including the   */
						/*   one indexed by cbp on  */
	for (len = 0; ! delimiter(ch); len++)	/*   entry, up to but not   */
	      getch(ch);			/*   including the next     */
						/*   delimiter.  ch contains*/
	return (len);				/*   and cbp indexes, the   */
}						/*   delimiter on exit	    */



		/********************************/
		/*		 		*/
		/*       G E T _ D E V          */
		/*		 		*/
		/********************************/

int						/* If the current token     */
get_dev()					/*   matches a valid device,*/
{						/*   return index in io to  */
	register int	i, j;			/*   device name.  If no    */
						/*   match, return invalid  */
						/*   index		    */
	for (i = 0; i < TYPES; i++)		/* For each valid name	    */
	{
	    for ( j = 0; j < 3; j++)		/* Try to match 3 characters*/
	    {
		if (io[i] [j] != utran(combuf.comline[combuf.cbp - 3 + j]))
		    break;			/* Not this device.  Next?  */

		if (j == 2)			/* Complete match?	    */
		      return (i);		/* Yes			    */
	    }
	}
	return (TYPES);				/* No match		    */
}


		/********************************/
		/*		 		*/
		/*           S C A N            */
		/*		 		*/
		/********************************/

VOID						/* Scan a file/device name  */
scan(fcba)					/* If file name, put in fcba*/
struct flctlb *fcba;				/* Set up any options       */
{
	register UWORD	i, length;

	*fcba = empty_fcb;			/* Clear out FCB	    */
	fcba->flfcb.drive = cdisk + 1;		/* Initialize to current    */
	fcba->user = c_user;			/*   disk and current user  */
	fcba->type = FILE;
						/* Clear out options	    */
	for (i = 0; i < sizeof cont; cont[i++] = 0);

	feedlen = matchlen = quitlen = 0;	/* Initialize string match  */
						/*   control variables	    */
	ambig = FALSE;				/* Filename not ambiguous   */
	
	deblank();				/* Skip to nonblank char    */

						/* Initialization done:	    */
						/*   parse		    */
	length = token();			/* Find a token		    */

	if (ch == ':')				/* Did it end with ':'?	    */
	{					/* Yes.  How long was it?   */
	    switch (length)
	    {
	      case 1:				/* Looks like a drive name  */
						/* Put in FCB, go on if OK  */

		if (! ('A' <= (ch = utran(combuf.comline[combuf.cbp - 1]))
		   && ((fcba->flfcb.drive = ch - 'A' + 1) <= MAXDRIVE)))
		    goto parse_error;		/* Not valid disk name	    */

		deblank();			/* Blanks may follow drive  */

		if((length = token()) == 0)  	/* Get another token.  If   */
						/*   it's null, and not     */
		    if (ch != '*') {		/*   an asterisk, device is */
		        fcba->type = DISKNAME;	/*   disk name only	    */
						/* Maybe options follow??   */
			if (ch == '[') {	/* Yes: collect options	    */
			    scanpar(fcba);
			    if (ch != ']'
				&& ch != CR)	/* Make sure the options    */
				    		/*  End? If Not format error*/
			      nonfile_error(6);  /* skip error? */
			    return;		/*  Return w/ ch == ']'	    */
			}
			combuf.cbp--;		/* Step back to last char   */
			return;			/* All done		    */
		    }
		break;				/* Non null token: filename */
		
	      case 3:				/* Looks like device name   */
						/* Matches known name?	    */
		if ((fcba->type = get_dev()) >= TYPES)
		    goto parse_error;		/* No: invalid device	    */

		if (gnc() == '[') {		/* Yes: collect options	    */
		    scanpar(fcba);
		    if (ch != ']'
			&& ch != CR)		/* Make sure the options    */
			nonfile_error(6);	/*   End if Not format error*/
		    else deblank();
		}
		combuf.cbp--;			/* Step back to last char   */
		return;				/* We're done               */
	
	      default:
		goto parse_error;		/* Unidentified token	    */
	    }
	}					/* Past the colon (if any): */
						/*   should be positioned at*/
						/*   filename		    */

	if (length > L_NAME) 			/* Too long for             */
	    goto parse_error;			/*   filename?		    */
	
	if ((ch == '*') && (length == 0))	/* Wildcard in filename?    */
	{					/* Yes: fill with ?'s	    */
	    move("????????", fcba->flfcb.fname, L_NAME);
	    getch(ch);
	    token();				/* Skip to next delimiter   */
	    ambig = TRUE;			/* Name is ambiguous	    */
	}
	else					/* Not wildcard:	    */
	{					/*   copy to FCB	    */
	    for( i = combuf.cbp - length; i < combuf.cbp; i++)
		combuf.comline[i] =		/* Translate filename to    */
		    utran(combuf.comline[i]);	/*   upper case		  */
	    move(&combuf.comline[combuf.cbp - length],
		 fcba->flfcb.fname, length);
	}

	if (ch == '.')				/* Does a type follow name? */
	{					/* Yes: read it		    */
	    getch(ch);
	    if ((length = token()) > L_TYPE)	/* Error if too long	    */
		goto parse_error;
	
	    if ((ch == '*') && (length == 0))	/* Wildcard in type?	    */
	    {					/* Yes: fill with ?'s	    */
	        move("???", fcba->flfcb.ftype, L_TYPE);
		getch(ch);
	        token();			/* Skip to next delimiter   */
	        ambig = TRUE;			/* Name is ambiguous	    */
	    }
	    else {				/* O K: copy to FCB         */
		for( i = combuf.cbp - length; i < combuf.cbp; i++)
	    	    combuf.comline[i] =		/* Translate filename to    */
			utran(combuf.comline[i]);/*   upper case	    */
		move(&combuf.comline[combuf.cbp - length],
		     fcba->flfcb.ftype, length);
	    }
	}

	if (HAS_XFCBS(ver)			/* Past the filename.  There*/
	   && (ch == ';'))			/*   could be a password    */
	{
	    getch(ch);
	    if ((length = token()) > L_PASS)	/* Error if too long	    */
		goto parse_error;
	
	    if (length != 0)			/* O K: copy to FCB if not  */
	    {					/*   zero length	    */
		move(&combuf.comline[combuf.cbp - length],
		     fcba->pwnam, length);

		if (fcba == &odest)		/* If parsing dest name,    */
			getpw = FALSE;		/*   show non-default passwd*/
	    }					/*   it to be used	    */
	}

						/* Maybe options follow??   */
	if (ch == '[') {			/* Yes: collect options	    */
	    scanpar(fcba);
	    if (ch != ']' && ch != CR)		/* Make sure the options    */
		nonfile_error(6);		/*  End? If Not format error*/
	    else deblank();
	}
	combuf.cbp--;				/* Align the input	    */
	return;					/* That's all, folks	    */

parse_error:
	combuf.cbp -= length;			/* Step back to first char  */
	return;					/*   of bad token	    */
}

/****************************************************************************/
/*									    */
/*	  U T I L I T Y   F U N C T I O N S   F O R   M A I N ( )           */
/*	  -------------------------------------------------------           */
/*									    */
/****************************************************************************/


		/********************************/
		/*		 		*/
		/*        G E T _ C M D         */
		/*		 		*/
		/********************************/

BOOLEAN						/* Get the next command line*/
get_cmd()					/* Return TRUE if not empty */
{						/* Also set up variables    */

	line_no = 0;				/* Line no for printer	    */
	concnt = column = 0;			/* Abort check, printer col */
	ndest = nsbuf = 0;			/* Src, dest buffer indices */
	made = FALSE;				/* Destination file not made*/
	concat = FALSE;				/* Single source file	    */
	putnum = TRUE;				/* Need line no before print*/
	dfile = sfile = TRUE;			/* Src, dest are files	    */
	nendcmd = TRUE;				/* Command end not reached  */
	page_line = (UWORD) -2;			/* Form feed before print   */
	combuf.cbp = (UWORD) -1;		/* Command buff index is    */
						/*   incremented to zero    */
	getpw = (HAS_XFCBS(ver));		/* Files may need passwords */

	if (multcom)				/* If in interactive mode,  */
	{					/*   get a command line     */
		_conout('*');			/* Prompt for it	    */
		rdcom();
		crlf();
		dcnt = 0;			/* Clear error flag         */
	}
	ch = ' ';				/* To solve the CR at eol   */
						/* bug                      */
	return ((UWORD) (combuf.comlen & 0xff) > 1);
						/* Tell caller if cmd empty */
}


		/********************************/
		/*		 		*/
		/*       D S T _ D I S K        */
		/*		 		*/
		/********************************/

VOID						/* Destination is a disk:   */
dst_disk()					/*   copy file(s) to it	    */
{
	BYTE	dd, du;

	ck_eol();				/* Nothing can follow name  */
	ck_disk();				/* Dest user or disk must   */
						/*   differ from source	    */
	odest.type = FILE;			/* Dest is really a file    */

	if (ambig)				/* Form is X:=Y:ambiguous   */
	{
		*SEARFCB = source.flfcb;	/* Prepare for search	    */
		multcopy();			/* Copy matching files	    */
	}
	else					/* Form is X:=Y:unique	    */
	{					/* Copy source FCB to dest, */
		dd = odest.flfcb.drive;		/*   preserving dest drive  */
		du = odest.user;		/*   and user number	    */
		odest = source;
		odest.flfcb.drive = dd;
		odest.user = du;
		simplecopy();			/* Copy the file	    */
	}
}



		/********************************/
		/*		 		*/
		/*   D I S K _ T O _ F I L E    */
		/*		 		*/
		/********************************/

VOID						/* Action command with form */
disk_to_file()					/*   unique=X:		    */
{
	BYTE	sd, su;

	ck_eol();				/* Nothing can follow name  */
	ck_disk();				/* Dest user or disk must   */
						/*   differ from source	    */
	source.type = FILE;			/* Source is really a file  */
	
	sd = source.flfcb.drive;		/* Copy dest FCB to source, */
	su = source.user;			/*   preserving source drive*/
	source = odest;				/*   and user number	    */
	source.flfcb.drive = sd;
	source.user = su;
	simplecopy();				/* Copy the file	    */
}


		/********************************/
		/*		 		*/
		/*    C O P Y _ S O U R C E     */
		/*		 		*/
		/********************************/

VOID						/* Transfer the current     */
copy_source()					/*   source file to the     */
{						/*   destination	    */
	register int	i;

	if (odest.type != FILE) dfile = FALSE;	/* So we won't fastcopy	    */

	if (odest.type == PRNT)			/* If the destination is    */
	{					/*   formatted printer set  */
		NUMB = TRUE;			/*   up default tabs and    */
		if (TABS == 0)			/*   page length if options */
			TABS = 8;		/*   have not already set   */
		if (PAGCNT == 0)		/*   them up		    */
			PAGCNT = 1;
	}

	switch (source.type)			/* How we behave depends on */
	{					/*   source type	    */
	  case FILE:				/* It's a file		    */
		if (ambig)			/* Name cannot be abiguous  */
			nonfile_error(4);
		break;				/* Name is unique: go to it!*/
	
	  case CONS:				/* It's valid, but not a    */
	  case AXIT:				/*   file		    */
	  case INPT:
		sfile = FALSE;
		break;
	
	  case NULT:				/* Null trailer: generate it*/
		for (i = NULLS; i--; putdest(0));
		return;				/* Transfer complete	    */
	
	  case EOFT:				/* End of file mark: send it*/
		putdest(ENDFILE);
		return;				/* Transfer complete	    */
	
	  default:				/* None of the above: error */
		nonfile_error(4);
	}
	
	simplecopy();				/* Transfer the data	    */
	ck_strings();				/* Abort if start, end	    */
						/*   string not found	    */
}

/****************************************************************************/
/*									    */
/*	               M A I N   F U N C T I O N                            */
/*	               -------------------------                            */
/*									    */
/* NOTE: this function is named _main, not main, so as to avoid the	    */
/*	 standard C prolog function (also called _main) being pulled in	    */
/*	 from the library at link-edit time.  The library function would    */
/*	 add a considerable amount of dead wood - notably several parts	    */
/*	 of the standard I/O package - which are not required by PIP	    */
/*									    */
/****************************************************************************/


VOID
_main()
{
	BOOLEAN	copydone;			/* Needed for case	    */
						/*  source.type == DISKNAME */
						/* Set up destination addr  */
	if (setjmp(main_stack) == 0)		/*   for non-local goto	    */
	{					/* Following code not reex- */
						/*   ecuted after error	    */
	    buff = _base->buff;			/* Set up pointers into	    */
	    fcb = &_base->fcb1;			/*   basepage		    */
						/* Get command line tail    */
	    move(buff, (char *) &combuf.comlen, sizeof (combuf.comline) + 1);

	    if (HAS_RETERR(ver = _version()))	/* Get CP/M version, set    */
		_ret_errors(0xff);		/*   error return mode	    */

	    if (multcom = (combuf.comlen == 0))	/* If cmd line tail empty,  */
						/*   interactive mode:	    */
		{				/*   announce ourselves     */
		print(signon);
		crlf();
	    }
	    c_user = last_user = _gset_ucode(0xff);
						/* Get current user	    */
	    cdisk = _ret_cdisk();		/*   and current disk	    */
	    eretry = FALSE;			/* First time around can't  */
	}					/*   be error retry!	    */

/****************************************************************************/
/* Restart here following longjmp at end of error().  Eretry shows whether  */
/*   current transfer should be retried or not (MP/M only)                  */
/****************************************************************************/

	if (eretry)
	    multcopy();				/* Retry failed transfer    */

	while (get_cmd())			/* Until empty command	    */
	{
	    copydone = FALSE;			/* Nothing done yet	    */

	    scan(&odest);			/* Parse destination name   */
	    if (ambig)				/* Cannot be ambiguous	    */
		error(3, NONE, FALSE, &odest);

	    deblank();				/* Should be assignment next*/
	    switch(ch)				/* Parse failures or bad    */
	    {					/*   command line will force*/
	      case '=':				/*   error at this point    */
	      case '<':
		break;				/* Valid assignment operator*/

	      default:				/* Invalid: error	    */
		nonfile_error(8);
	    }

	    scan(&source);			/* Parse first source name  */

	    switch (odest.type)			/* We are now in a position */
	    {					/*   to handle special cases*/
	      case CONS:
	      case OUTT:
	      case AXOT:
		break;				/* These cases not special  */

	      case PRNT:			/* Formatted list device:   */
	      case LSTT:			/* List device: if MP/M,    */
		if (IS_MPM(ver)			/*   check device is avail- */
		   && (_cond_lst() == 0xff))	/*   able and abort if not  */
		    nonfile_error(8);
		break;

	      case FILE:			/* Form may be unique=X:    */
		if (source.type == DISKNAME)
		{				/* Yes, it is		    */
		    disk_to_file();
	    	    combuf.comlen = multcom;	/* Zero command length if   */
						/*   single command	    */
		    continue;			/* Done with current command*/
		}
		break;				/* Not a special case	    */

	      case DISKNAME:			/* Form is X: = something   */
		if (source.type != FILE)	/* Error if "something" not */
		    nonfile_error(8);		/*   a filename		    */

		dst_disk();			/* O K: go do the work	    */
		copydone = TRUE;		/* So we won't do the	    */
		break;				/* copy_source() below	    */

	      default:				/* Should have been one of  */
		nonfile_error(3);		/*   the above.  Error	    */
	    }

	    while (nendcmd)			/* While still more to do   */
	    {
		deblank();			/* Skip blanks in cmd line  */
		switch(ch)			/* What have we found?	    */
		{
		  case CR:			/* The end of the line	    */
		    nendcmd = FALSE;
		    break;
		
		  case ',':			/* An indication that	    */
		    concat = nendcmd = TRUE;	/*   another file follows   */
		    break;
		   
		  default:			/* An illegal separator...   */
		    nonfile_error(16);
		}

		if( ! copydone )		/* If not done already...   */
		    copy_source();		/* ...perform transfer	    */

		if (nendcmd)			/* If more files named,	    */
		    scan(&source);		/*   go parse another	    */
	    }

	    combuf.comlen = multcom;		/* Zero command length if   */
						/*   single command	    */
	}					/* End of while (get_cmd()) */

	setuser(c_user);			/* Restore current user	    */
	_exit(0);				/* Normal exit from PIP	    */
}
