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ed.h
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C/C++ Source or Header
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1986-03-04
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7KB
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163 lines
/*
* This file is the general header file for
* all parts of the MicroEMACS display editor. It contains
* definitions used by everyone, and it contains the stuff
* you have to edit to create a version of the editor for
* a specific operating system and terminal.
*/
#define NROW 24 /* Screen size. */
#define NCOL 80 /* Edit if you want to. */
#define BEL 0x07 /* BEL character. */
#define CVMVAS 1 /* C-V, M-V arg. in screens. */
#define NFILEN 80 /* # of bytes, file name */
#define NBUFN 16 /* # of bytes, buffer name */
#define NLINE 256 /* # of bytes, line */
#define NKBDM 256 /* # of strokes, keyboard macro */
#define NPAT 80 /* # of bytes, pattern */
#define HUGE 1000 /* Huge number */
#define METACH 0x1B /* M- prefix, Control-[, ESC */
#define CTMECH 0x1C /* C-M- prefix, Control-\ */
#define EXITCH 0x1D /* Exit level, Control-] */
#define CTRLCH 0x1E /* C- prefix, Control-^ */
#define HELPCH 0x1F /* Help key, Control-_ */
#define CTRL 0x0100 /* Control flag, or'ed in */
#define META 0x0200 /* Meta flag, or'ed in */
#define CTLX 0x0400 /* ^X flag, or'ed in */
#define EXTKY 0x0800 /* extended key flad or'ed in */
/* for IBM PC's and clones */
#define FALSE 0 /* False, no, bad, etc. */
#define TRUE 1 /* True, yes, good, etc. */
#define ABORT 2 /* Death, ^G, abort, etc. */
#define FIOSUC 0 /* File I/O, success. */
#define FIOFNF 1 /* File I/O, file not found. */
#define FIOEOF 2 /* File I/O, end of file. */
#define FIOERR 3 /* File I/O, error. */
#define CFCPCN 0x0001 /* Last command was C-P, C-N */
#define CFKILL 0x0002 /* Last command was a kill */
/*
* There is a window structure allocated for
* every active display window. The windows are kept in a
* big list, in top to bottom screen order, with the listhead at
* "wheadp". Each window contains its own values of dot and mark.
* The flag field contains some bits that are set by commands
* to guide redisplay; although this is a bit of a compromise in
* terms of decoupling, the full blown redisplay is just too
* expensive to run for every input character.
*/
typedef struct WINDOW {
struct WINDOW *w_wndp; /* Next window */
struct BUFFER *w_bufp; /* Buffer displayed in window */
struct LINE *w_linep; /* Top line in the window */
struct LINE *w_dotp; /* Line containing "." */
short w_doto; /* Byte offset for "." */
struct LINE *w_markp; /* Line containing "mark" */
short w_marko; /* Byte offset for "mark" */
char w_toprow; /* Origin 0 top row of window */
char w_ntrows; /* # of rows of text in window */
char w_force; /* If NZ, forcing row. */
char w_flag; /* Flags. */
} WINDOW;
#define WFFORCE 0x01 /* Window needs forced reframe */
#define WFMOVE 0x02 /* Movement from line to line */
#define WFEDIT 0x04 /* Editing within a line */
#define WFHARD 0x08 /* Better to a full display */
#define WFMODE 0x10 /* Update mode line. */
/*
* Text is kept in buffers. A buffer header, described
* below, exists for every buffer in the system. The buffers are
* kept in a big list, so that commands that search for a buffer by
* name can find the buffer header. There is a safe store for the
* dot and mark in the header, but this is only valid if the buffer
* is not being displayed (that is, if "b_nwnd" is 0). The text for
* the buffer is kept in a circularly linked list of lines, with
* a pointer to the header line in "b_linep".
*/
typedef struct BUFFER {
struct BUFFER *b_bufp; /* Link to next BUFFER */
struct LINE *b_dotp; /* Link to "." LINE structure */
short b_doto; /* Offset of "." in above LINE */
struct LINE *b_markp; /* The same as the above two, */
short b_marko; /* but for the "mark" */
struct LINE *b_linep; /* Link to the header LINE */
char b_nwnd; /* Count of windows on buffer */
char b_flag; /* Flags */
char b_fname[NFILEN]; /* File name */
char b_bname[NBUFN]; /* Buffer name */
} BUFFER;
#define BFTEMP 0x01 /* Internal temporary buffer */
#define BFCHG 0x02 /* Changed since last write */
#define BFOVRWRITE 0x10 /* in overwrite mode */
/*
* The starting position of a
* region, and the size of the region in
* characters, is kept in a region structure.
* Used by the region commands.
*/
typedef struct {
struct LINE *r_linep; /* Origin LINE address. */
short r_offset; /* Origin LINE offset. */
short r_size; /* Length in characters. */
} REGION;
/*
* All text is kept in circularly linked
* lists of "LINE" structures. These begin at the
* header line (which is the blank line beyond the
* end of the buffer). This line is pointed to by
* the "BUFFER". Each line contains a the number of
* bytes in the line (the "used" size), the size
* of the text array, and the text. The end of line
* is not stored as a byte; it's implied. Future
* additions will include update hints, and a
* list of marks into the line.
*/
typedef struct LINE {
struct LINE *l_fp; /* Link to the next line */
struct LINE *l_bp; /* Link to the previous line */
short l_size; /* Allocated size */
short l_used; /* Used size */
char l_text[1]; /* A bunch of characters. */
} LINE;
#define lforw(lp) ((lp)->l_fp)
#define lback(lp) ((lp)->l_bp)
#define lgetc(lp, n) ((lp)->l_text[(n)]&0xFF)
#define lputc(lp, n, c) ((lp)->l_text[(n)]=(c))
#define llength(lp) ((lp)->l_used)
extern int fillcol; /* Fill column */
extern int currow; /* Cursor row */
extern int curcol; /* Cursor column */
extern int thisflag; /* Flags, this command */
extern int lastflag; /* Flags, last command */
extern int curgoal; /* Goal for C-P, C-N */
extern int mpresf; /* Stuff in message line */
extern int sgarbf; /* State of screen unknown */
extern WINDOW *curwp; /* Current window */
extern BUFFER *curbp; /* Current buffer */
extern WINDOW *wheadp; /* Head of list of windows */
extern BUFFER *bheadp; /* Head of list of buffers */
extern BUFFER *blistp; /* Buffer for C-X C-B */
extern short kbdm[]; /* Holds kayboard macro data */
extern short *kbdmip; /* Input pointer for above */
extern short *kbdmop; /* Output pointer for above */
extern char pat[]; /* Search pattern */
extern BUFFER *bfind(); /* Lookup a buffer by name */
extern WINDOW *wpopup(); /* Pop up window creation */
extern LINE *lalloc(); /* Allocate a line */