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The C Users' Group Library 1994 August
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wc-cdrom-cusersgrouplibrary-1994-08.iso
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vol_100
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133_01
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e.h
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1985-03-10
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/*
e screen editor
(C) G. Nigel Gilbert, MICROLOGY, 1981
licensed for private non-profitmaking use 1983
August-December 1981
FILE: e.h
PURPOSE: standard header file, #included in all function files
(NB e does NOT require "bdscio.h")
*/
#define VERSION "4.8a"
/*
compile with -e7e00 (e10 with -o as well)
load with -t 9500 using l2 (see TOP below)
*/
#define TOP 0x9500 /*top of program- MUST BE EQUAL TO the -t arg to l2 */
#define CCP 0x0800 /*length of CP/M's CCP */
#define CURSORWAIT 1000 /*set this according to the speed of your
microprocessor clock
- for a Z80A set to 1000
- for an 8080 set to 500
- for a Z80B set to 1500
Note that an incorrect setting of this constant
does NOT create errors - just makes the cursor
flash too fast/slow */
#define SECSIZ 128 /*file buffer definitions*/
#define NSECTS 16
#define IOBUFSIZ (NSECTS * SECSIZ + 6 )
#define FILELEN 18 /*max length of file name (UU/D:FFFFFFFF.xxx\0)*/
#define INBUFLEN 20 /*length of type-in buffer */
#define JBUFSIZE 6 /*size of buffer required for longjumps*/
#define LLIM 255 /*max length of a line*/
#define FLIM 80 /*max length of find/alter string*/
#define FAIL -1
#define NULL 0
#define YES 1
#define NO 0
#define PREV -2
#define HISTLEN 40 /*history stack of commands for undoing */
#define HISTINSERT 1 /*type of command on history stack */
#define HISTDELETE 2
#define HISTREPLACE 3
#define SWIDTH 79 /*screen size*/
#define SHEIGHT 23
#define OFFWIDTH 20 /*horizontal scroll increment*/
#define PAGEOVERLAP 4 /*overlap between pages with UP,DOWN-PAGE*/
#define HELPLINES 8 /*top line number when help menu is on display */
#define FNPOS 8 /*status line - position of file name*/
#define LNPOS 23 /* position of line number*/
#define EMPOS 32 /* position of error message*/
#define WAITPOS 32 /* position of cursor when searching/reading*/
#define REPPOS 50 /* position of "Replace?" message*/
#define BACKSP 0x08 /*backspace*/
#define ENDFILE 0x1a /*CP/M end of text file mark */
#define CTRL 0x1f /*last control char.*/
#define PARBIT 0x80 /*parity bit used as a flag by testkey() */
#define NOPARITY 0x7f /*mask to strip parity bit */
#define NKEYS 32 /*number of key codes*/
#define GOTOLEN 6 /*approx number of chars in control code string for
cursor addressing*/
/*internal key codes (recommended key assignments in brackets)*/
#define LEADIN 0 /*lead in chararacter to key codes -
ignored, but following key code parity set*/
#define DOWNKEY 1 /*cursor down */
#define UPKEY 2 /*cursor up*/
#define LEFTKEY 3 /*cursor left*/
#define RIGHTKEY 4 /*cursor right*/
#define RIGHTWKEY 5 /*cursor right one word (D) */
#define LEFTWKEY 6 /*cursor left one word (S) */
#define EOLKEY 7 /*cursor to end of line (E) */
#define BOLKEY 8 /*cursor to beginning of line (B) */
#define UPPAGE 9 /*scroll up a page (W) */
#define DOWNPAGE 10 /*scroll down a page (Z) */
#define BOFKEY 11 /*cursor to beginning of file (U) */
#define HOMEKEY 12 /*cursor to end of file (HOME) */
#define DELLEFT 13 /*delete char to left of cursor (DEL) */
#define DELRIGHT 14 /*delete char under cursor (G) */
#define DELLNKEY 15 /*delete cursor line (Y) */
#define DELWDKEY 16 /*delete word to right of cursor (T) */
#define JUMPKEY 17 /*jump to (X) */
#define CRSTILL 18 /*insert newline after cursor (N) */
#define QUITKEY 19 /*quit (Q) */
#define ENVIRKEY 20 /*edit and file context (C) */
#define FINDKEY 21 /*find (F) */
#define ALTERKEY 22 /*alter (A) */
#define BLOCKKEY 23 /*block operations (O) */
#define RDFILEKEY 24 /*read a file (P) */
#define REPKEY 25 /*repeat last find/alter (R) */
#define HELPKEY 26 /*display help menu (V) */
#define UNDOKEY 27 /*undo history of commands (\) */
#define TAB 28 /*tab (I)*/
#define RETRIEVE 29 /*retrieve last name etc entered here (R)*/
#define CR 30 /*return (M)*/
#define ESCKEY 31 /*the magic escape key (ESC)*/
#define BRIDIM '|' /*char placed in e's message strings to start/stop
dim (half-intensity) display */
#define DEBUGSCR NO /*display control chars as numeric literals for
testing screen displays*/
/* CP/M bdos function codes */
#define RESET 0
#define CONIN 0x01
#define CONOUT 0x02
#define LSTOUT 0x05
#define DIRIO 0x06
#define IOBYTE 0x07
#define SETIOBYTE 0x08
#define PRINTS 0x09
#define READBUF 0x0A
#define CONSTAT 0x0B
#define VERNO 0x0C
#define RESETDSK 0x0D
#define SELDSK 0x0E
#define OPEN 0x0F
#define CLOSEF 0x10
#define SEARCH1 0x11
#define SEARCHN 0x12
#define DELETEF 0x13
#define READ 0x14
#define WRITE 0x15
#define MAKE 0x16
#define RENAME 0x17
#define LOGINV 0x18
#define CURDSK 0x19
#define SETDMA 0x1A
#define PROTECT 0x1C
#define GETROV 0x1d
#define DSKPARAMS 0x1F
#define USERCODE 0x20
#define READR 0x21
#define WRITER 0x22
#define FSIZE 0x23
#define SETRR 0x24
#define RESETDRV 0x25
#define CPM3ERRORMODE 45 /*set error mode to return and display
(specific to CP/M Plus) */
#define MAXSLOTS 128 /*virtual memory constants*/
#define MAXMEMSLOTS 20
#define PAGESIZE 1024
#define PAGESECTS (PAGESIZE/SECSIZ)
#define FREE 0
#define INUSE 1
#define NOTAVAIL -1
#define MAXINT 32767
#define NOFILE (MAXINT)
#define ABSOLUTE 0
#define UNKNOWN (MAXINT)
#define sint char
struct addr {
sint page;
int moffset;
} *tp; /*address of text of each line*/
sint cpm2x; /*operating system is CP/M 2.x*/
int allocp; /*location of next free in newpage */
int pageloc[MAXSLOTS]; /*current location of each page*/
int usage[MAXMEMSLOTS]; /*records usage of in memory slots*/
char *slotaddr[MAXMEMSLOTS]; /*memory addr of start of each in memory slot*/
sint dskslots[MAXSLOTS]; /*is disk slot free*/
sint slotsinmem; /*max no. of slots available in memory*/
sint tppages; /*no. of pages used to hold text pointers*/
sint newpage; /*page no of page being filled with text*/
char *npaddr; /*base of slot holding newpage*/
int clock; /*counter for least recently used paging*/
int pagefd; /*file descriptor of paging file*/
char pagingfile[FILELEN]; /*name of paging file*/
char pagingdisk; /*disk to put paging file on*/
sint curdsk; /*currently logged in (default) disk*/
unsigned ncommand; /*count of commands executed since startup*/
char mainmenu[JBUFSIZE]; /*for emergency longjump*/
int goodline; /*line number we know we can display */
unsigned errold[4]; /*temp store for CP/M's error jump addrs*/
char dskerr[JBUFSIZE]; /*for bdos disk error traps*/
char textbuf[IOBUFSIZ]; /*io buffer for file being edited*/
struct histstep { /*command history stack for undoing */
struct addr histp; /*address of text modified by command*/
int histline; /*line number of modified text*/
sint histtype; /*type of command (insert,delete,replace)*/
sint histcomm; /*number of command modulo 256 */
} history[HISTLEN];
int histptr; /*pointer into history stack*/
sint histcnt; /*number of commands on stack*/
sint storehist; /*commands only stored on history when true*/
sint cursorx, cursory; /*current position of cursor*/
char tran[NKEYS]; /*translation table from external to internal
key codes*/
sint isdim; /*last char was in dim*/
int lastl; /*number of last line of text*/
int lastread; /*last line actually read to date*/
sint goteof; /*true when eof of file being edited*/
int cline; /*current line*/
char text[LLIM]; /*buffer for current line of text*/
int charn; /*position of current char in current line*/
sint altered; /*if YES, current line has been altered by edits*/
int pfirst, plast; /*top and bottom line displayed on screen*/
sint topline; /*first line on screen for text*/
sint offset; /*first col. to display on screen*/
sint lastoff; /*offset last time resetcursor() was called*/
sint blankedmess; /*message area has been blanked, not overwritten*/
char inbuf[INBUFLEN]; /*input buffer for typeahead*/
sint inbufp; /*pointer to next free in inbuf*/
/*environment options*/
sint autoin; /*do auto indentation*/
sint backup; /*at end, old version becomes file.bak*/
sint tabwidth; /*width between tabstops*/
sint trail; /*don't chop trailing blanks from text lines*/
sint wboot; /*do a warm boot on exit; else jump to CCP*/
sint displaypos; /*display line:col at top of screen*/
sint blockscroll; /*horizontal scroll whole page*/
sint hilight; /*make current line bright, rest dim*/
char filename[FILELEN]; /*current file being edited*/
char *errmess; /*last error message*/
char ans[6]; /*line to jump to*/
char patt[FLIM]; /*pattern to find*/
char changeto[FLIM]; /*replacement string*/
char opts[5]; /*options for alter*/
sint replace; /*last find/replace was a replace*/
int findir; /*direction of last find*/
sint nocheck; /*don't ask for confirmation before replacing*/
sint repeat; /*repeat last find/replace*/
sint nocase; /*ignore case in comparison*/
char name[FILELEN]; /*filename for read and write files*/
sint helpon; /*display help menu*/
int from,to; /*block start and end*/
sint blocking; /*true if block is or has been defined*/
char fbuf[IOBUFSIZ]; /*file buffer for all file ops other than edited file*/
struct iobuffer {
int _fd;
int _nleft;
char *_nextp;
char _buff[NSECTS * SECSIZ];
}; /*the structure of the file buffers*/
/*end of standard header*/
e; /*current line*/
char text[LLIM]; /*buffer for curren