# This is a shell archive. Remove anything before this line, # then unpack it by saving it in a file and typing "sh file". # # Wrapped by tralfaz!ove on Wed Jan 13 14:06:28 PST 1988 # Contents: displa.c dolock.c egapc.c eval.c exec.c echo x - displa.c sed 's/^@//' > "displa.c" <<'@//E*O*F displa.c//' /* * The functions in this file handle redisplay. There are two halves, the * ones that update the virtual display screen, and the ones that make the * physical display screen the same as the virtual display screen. These * functions use hints that are left in the windows by the commands. * */ #include #include "estruc.h" #include "edef.h" #if MEGAMAX & ST520 overlay "display" #endif typedef struct VIDEO { int v_flag; /* Flags */ #if COLOR int v_fcolor; /* current forground color */ int v_bcolor; /* current background color */ int v_rfcolor; /* requested forground color */ int v_rbcolor; /* requested background color */ #endif char v_text[1]; /* Screen data. */ } VIDEO; #define VFCHG 0x0001 /* Changed flag */ #define VFEXT 0x0002 /* extended (beyond column 80) */ #define VFREV 0x0004 /* reverse video status */ #define VFREQ 0x0008 /* reverse video request */ #define VFCOL 0x0010 /* color change requested */ VIDEO **vscreen; /* Virtual screen. */ #if MEMMAP == 0 VIDEO **pscreen; /* Physical screen. */ #endif /* * Initialize the data structures used by the display code. The edge vectors * used to access the screens are set up. The operating system's terminal I/O * channel is set up. All the other things get initialized at compile time. * The original window has "WFCHG" set, so that it will get completely * redrawn on the first call to "update". */ vtinit() { register int i; register VIDEO *vp; char *malloc(); TTopen(); /* open the screen */ TTkopen(); /* open the keyboard */ TTrev(FALSE); vscreen = (VIDEO **) malloc(term.t_nrow*sizeof(VIDEO *)); if (vscreen == NULL) exit(1); #if MEMMAP == 0 pscreen = (VIDEO **) malloc(term.t_nrow*sizeof(VIDEO *)); if (pscreen == NULL) exit(1); #endif for (i = 0; i < term.t_nrow; ++i) { vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_mcol); if (vp == NULL) exit(1); vp->v_flag = 0; #if COLOR vp->v_rfcolor = 7; vp->v_rbcolor = 0; #endif vscreen[i] = vp; #if MEMMAP == 0 vp = (VIDEO *) malloc(sizeof(VIDEO)+term.t_mcol); if (vp == NULL) exit(1); vp->v_flag = 0; pscreen[i] = vp; #endif } } /* * Clean up the virtual terminal system, in anticipation for a return to the * operating system. Move down to the last line and clear it out (the next * system prompt will be written in the line). Shut down the channel to the * terminal. */ vttidy() { mlerase(); movecursor(term.t_nrow, 0); TTflush(); TTclose(); TTkclose(); } /* * Set the virtual cursor to the specified row and column on the virtual * screen. There is no checking for nonsense values; this might be a good * idea during the early stages. */ vtmove(row, col) { vtrow = row; vtcol = col; } /* Write a character to the virtual screen. The virtual row and column are updated. If we are not yet on left edge, don't print it yet. If the line is too long put a "$" in the last column. This routine only puts printing characters into the virtual terminal buffers. Only column overflow is checked. */ vtputc(c) int c; { register VIDEO *vp; /* ptr to line being updated */ vp = vscreen[vtrow]; if (c == '\t') { do { vtputc(' '); } while (((vtcol + taboff)&0x07) != 0); } else if (vtcol >= term.t_ncol) { ++vtcol; vp->v_text[term.t_ncol - 1] = '$'; } else if (c < 0x20 || c == 0x7F) { vtputc('^'); vtputc(c ^ 0x40); } else { if (vtcol >= 0) vp->v_text[vtcol] = c; ++vtcol; } } /* * Erase from the end of the software cursor to the end of the line on which * the software cursor is located. */ vteeol() { register VIDEO *vp; vp = vscreen[vtrow]; while (vtcol < term.t_ncol) vp->v_text[vtcol++] = ' '; } /* upscreen: user routine to force a screen update always finishes complete update */ upscreen(f, n) { update(TRUE); return(TRUE); } /* * Make sure that the display is right. This is a three part process. First, * scan through all of the windows looking for dirty ones. Check the framing, * and refresh the screen. Second, make sure that "currow" and "curcol" are * correct for the current window. Third, make the virtual and physical * screens the same. */ update(force) int force; /* force update past type ahead? */ { register WINDOW *wp; #if TYPEAH if (force == FALSE && typahead()) return(TRUE); #endif #if VISMAC == 0 if (force == FALSE && kbdmode == PLAY) return(TRUE); #endif /* update any windows that need refreshing */ wp = wheadp; while (wp != NULL) { if (wp->w_flag) { /* if the window has changed, service it */ reframe(wp); /* check the framing */ if ((wp->w_flag & ~WFMODE) == WFEDIT) updone(wp); /* update EDITed line */ else if (wp->w_flag & ~WFMOVE) updall(wp); /* update all lines */ if (wp->w_flag & WFMODE) modeline(wp); /* update modeline */ wp->w_flag = 0; wp->w_force = 0; } /* on to the next window */ wp = wp->w_wndp; } /* recalc the current hardware cursor location */ updpos(); #if MEMMAP /* update the cursor and flush the buffers */ movecursor(currow, curcol - lbound); #endif /* check for lines to de-extend */ upddex(); /* if screen is garbage, re-plot it */ if (sgarbf != FALSE) updgar(); /* update the virtual screen to the physical screen */ updupd(force); /* update the cursor and flush the buffers */ movecursor(currow, curcol - lbound); TTflush(); return(TRUE); } /* reframe: check to see if the cursor is on in the window and re-frame it if needed or wanted */ reframe(wp) WINDOW *wp; { register LINE *lp; register int i; /* if not a requested reframe, check for a needed one */ if ((wp->w_flag & WFFORCE) == 0) { lp = wp->w_linep; for (i = 0; i < wp->w_ntrows; i++) { /* if the line is in the window, no reframe */ if (lp == wp->w_dotp) return(TRUE); /* if we are at the end of the file, reframe */ if (lp == wp->w_bufp->b_linep) break; /* on to the next line */ lp = lforw(lp); } } /* reaching here, we need a window refresh */ i = wp->w_force; /* how far back to reframe? */ if (i > 0) { /* only one screen worth of lines max */ if (--i >= wp->w_ntrows) i = wp->w_ntrows - 1; } else if (i < 0) { /* negative update???? */ i += wp->w_ntrows; if (i < 0) i = 0; } else i = wp->w_ntrows / 2; /* backup to new line at top of window */ lp = wp->w_dotp; while (i != 0 && lback(lp) != wp->w_bufp->b_linep) { --i; lp = lback(lp); } /* and reset the current line at top of window */ wp->w_linep = lp; wp->w_flag |= WFHARD; wp->w_flag &= ~WFFORCE; return(TRUE); } /* updone: update the current line to the virtual screen */ updone(wp) WINDOW *wp; /* window to update current line in */ { register LINE *lp; /* line to update */ register int sline; /* physical screen line to update */ register int i; /* search down the line we want */ lp = wp->w_linep; sline = wp->w_toprow; while (lp != wp->w_dotp) { ++sline; lp = lforw(lp); } /* and update the virtual line */ vscreen[sline]->v_flag |= VFCHG; vscreen[sline]->v_flag &= ~VFREQ; vtmove(sline, 0); for (i=0; i < llength(lp); ++i) vtputc(lgetc(lp, i)); #if COLOR vscreen[sline]->v_rfcolor = wp->w_fcolor; vscreen[sline]->v_rbcolor = wp->w_bcolor; #endif vteeol(); } /* updall: update all the lines in a window on the virtual screen */ updall(wp) WINDOW *wp; /* window to update lines in */ { register LINE *lp; /* line to update */ register int sline; /* physical screen line to update */ register int i; /* search down the lines, updating them */ lp = wp->w_linep; sline = wp->w_toprow; while (sline < wp->w_toprow + wp->w_ntrows) { /* and update the virtual line */ vscreen[sline]->v_flag |= VFCHG; vscreen[sline]->v_flag &= ~VFREQ; vtmove(sline, 0); if (lp != wp->w_bufp->b_linep) { /* if we are not at the end */ for (i=0; i < llength(lp); ++i) vtputc(lgetc(lp, i)); lp = lforw(lp); } /* on to the next one */ #if COLOR vscreen[sline]->v_rfcolor = wp->w_fcolor; vscreen[sline]->v_rbcolor = wp->w_bcolor; #endif vteeol(); ++sline; } } /* updpos: update the position of the hardware cursor and handle extended lines. This is the only update for simple moves. */ updpos() { register LINE *lp; register int c; register int i; /* find the current row */ lp = curwp->w_linep; currow = curwp->w_toprow; while (lp != curwp->w_dotp) { ++currow; lp = lforw(lp); } /* find the current column */ curcol = 0; i = 0; while (i < curwp->w_doto) { c = lgetc(lp, i++); if (c == '\t') curcol |= 0x07; else if (c < 0x20 || c == 0x7f) ++curcol; ++curcol; } /* if extended, flag so and update the virtual line image */ if (curcol >= term.t_ncol - 1) { vscreen[currow]->v_flag |= (VFEXT | VFCHG); updext(); } else lbound = 0; } /* upddex: de-extend any line that derserves it */ upddex() { register WINDOW *wp; register LINE *lp; register int i,j; wp = wheadp; while (wp != NULL) { lp = wp->w_linep; i = wp->w_toprow; while (i < wp->w_toprow + wp->w_ntrows) { if (vscreen[i]->v_flag & VFEXT) { if ((wp != curwp) || (lp != wp->w_dotp) || (curcol < term.t_ncol - 1)) { vtmove(i, 0); for (j = 0; j < llength(lp); ++j) vtputc(lgetc(lp, j)); vteeol(); /* this line no longer is extended */ vscreen[i]->v_flag &= ~VFEXT; vscreen[i]->v_flag |= VFCHG; } } lp = lforw(lp); ++i; } /* and onward to the next window */ wp = wp->w_wndp; } } /* updgar: if the screen is garbage, clear the physical screen and the virtual screen and force a full update */ updgar() { register char *txt; register int i,j; for (i = 0; i < term.t_nrow; ++i) { vscreen[i]->v_flag |= VFCHG; #if REVSTA vscreen[i]->v_flag &= ~VFREV; #endif #if COLOR vscreen[i]->v_fcolor = gfcolor; vscreen[i]->v_bcolor = gbcolor; #endif #if MEMMAP == 0 txt = pscreen[i]->v_text; for (j = 0; j < term.t_ncol; ++j) txt[j] = ' '; #endif } movecursor(0, 0); /* Erase the screen. */ (*term.t_eeop)(); sgarbf = FALSE; /* Erase-page clears */ mpresf = FALSE; /* the message area. */ #if COLOR mlerase(); /* needs to be cleared if colored */ #endif } /* updupd: update the physical screen from the virtual screen */ updupd(force) int force; /* forced update flag */ { register VIDEO *vp1; register int i; for (i = 0; i < term.t_nrow; ++i) { vp1 = vscreen[i]; /* for each line that needs to be updated*/ if ((vp1->v_flag & VFCHG) != 0) { #if TYPEAH if (force == FALSE && typahead()) return(TRUE); #endif #if MEMMAP updateline(i, vp1); #else updateline(i, vp1, pscreen[i]); #endif } } return(TRUE); } /* updext: update the extended line which the cursor is currently on at a column greater than the terminal width. The line will be scrolled right or left to let the user see where the cursor is */ updext() { register int rcursor; /* real cursor location */ register LINE *lp; /* pointer to current line */ register int j; /* index into line */ /* calculate what column the real cursor will end up in */ rcursor = ((curcol - term.t_ncol) % term.t_scrsiz) + term.t_margin; taboff = lbound = curcol - rcursor + 1; /* scan through the line outputing characters to the virtual screen */ /* once we reach the left edge */ vtmove(currow, -lbound); /* start scanning offscreen */ lp = curwp->w_dotp; /* line to output */ for (j=0; jv_text[0] = '$'; } /* * Update a single line. This does not know how to use insert or delete * character sequences; we are using VT52 functionality. Update the physical * row and column variables. It does try an exploit erase to end of line. The * RAINBOW version of this routine uses fast video. */ #if MEMMAP #if CRAY /* not used, CRAY should have MEMMAP off */ /* We pretend the cray is mem mapped. The network is assumed fast and * the i/o will crawl unless large swabs of data are written at once. The * data is written by saving the cursor position, moving to the desired line, * writing the line, and restoring the cursor. */ cupdateline(row, vp1) int row; /* row of screen to update */ struct VIDEO *vp1; /* virtual screen image */ { if ( inhibit_update ) return ; /* wait til later */ ansiputs(row,vp1->v_text); /* code is in cransi.c */ ttflush() ; vp1->v_flag &= ~(VFCHG | VFCOL); /* flag this line as changed */ } #else /* UPDATELINE specific code for the IBM-PC and other compatables */ updateline(row, vp1) int row; /* row of screen to update */ struct VIDEO *vp1; /* virtual screen image */ { #if COLOR scwrite(row, vp1->v_text, vp1->v_rfcolor, vp1->v_rbcolor); vp1->v_fcolor = vp1->v_rfcolor; vp1->v_bcolor = vp1->v_rbcolor; #else if (vp1->v_flag & VFREQ) scwrite(row, vp1->v_text, 0, 7); else scwrite(row, vp1->v_text, 7, 0); #endif vp1->v_flag &= ~(VFCHG | VFCOL); /* flag this line as changed */ } #endif /* IBMPC */ #else /* MEMMAP */ updateline(row, vp1, vp2) int row; /* row of screen to update */ struct VIDEO *vp1; /* virtual screen image */ struct VIDEO *vp2; /* physical screen image */ { #if RAINBOW /* UPDATELINE specific code for the DEC rainbow 100 micro */ register char *cp1; register char *cp2; register int nch; /* since we don't know how to make the rainbow do this, turn it off */ flags &= (~VFREV & ~VFREQ); cp1 = &vp1->v_text[0]; /* Use fast video. */ cp2 = &vp2->v_text[0]; putline(row+1, 1, cp1); nch = term.t_ncol; do { *cp2 = *cp1; ++cp2; ++cp1; } while (--nch); *flags &= ~VFCHG; #else /* UPDATELINE code for all other versions */ register char *cp1; register char *cp2; register char *cp3; register char *cp4; register char *cp5; register int nbflag; /* non-blanks to the right flag? */ int rev; /* reverse video flag */ int req; /* reverse video request flag */ /* set up pointers to virtual and physical lines */ cp1 = &vp1->v_text[0]; cp2 = &vp2->v_text[0]; #if COLOR TTforg(vp1->v_rfcolor); TTbacg(vp1->v_rbcolor); #endif #if REVSTA | COLOR /* if we need to change the reverse video status of the current line, we need to re-write the entire line */ rev = (vp1->v_flag & VFREV) == VFREV; req = (vp1->v_flag & VFREQ) == VFREQ; if ((rev != req) #if COLOR || (vp1->v_fcolor != vp1->v_rfcolor) || (vp1->v_bcolor != vp1->v_rbcolor) #endif #if HP150 /* the HP150 has some reverse video problems */ || req || rev #endif ) { movecursor(row, 0); /* Go to start of line. */ /* set rev video if needed */ if (rev != req) (*term.t_rev)(req); /* scan through the line and dump it to the screen and the virtual screen array */ cp3 = &vp1->v_text[term.t_ncol]; while (cp1 < cp3) { TTputc(*cp1); ++ttcol; *cp2++ = *cp1++; } /* turn rev video off */ if (rev != req) (*term.t_rev)(FALSE); /* update the needed flags */ vp1->v_flag &= ~VFCHG; if (req) vp1->v_flag |= VFREV; else vp1->v_flag &= ~VFREV; #if COLOR vp1->v_fcolor = vp1->v_rfcolor; vp1->v_bcolor = vp1->v_rbcolor; #endif return(TRUE); } #endif /* advance past any common chars at the left */ while (cp1 != &vp1->v_text[term.t_ncol] && cp1[0] == cp2[0]) { ++cp1; ++cp2; } /* This can still happen, even though we only call this routine on changed * lines. A hard update is always done when a line splits, a massive * change is done, or a buffer is displayed twice. This optimizes out most * of the excess updating. A lot of computes are used, but these tend to * be hard operations that do a lot of update, so I don't really care. */ /* if both lines are the same, no update needs to be done */ if (cp1 == &vp1->v_text[term.t_ncol]) { vp1->v_flag &= ~VFCHG; /* flag this line is changed */ return(TRUE); } /* find out if there is a match on the right */ nbflag = FALSE; cp3 = &vp1->v_text[term.t_ncol]; cp4 = &vp2->v_text[term.t_ncol]; /* tabs cause problems on workstation (because only ansi stuff is sent), * so only optimize out blanks at eol with tteol */ #if CRAY cp5 = cp3 ; while (cp5 != cp1 && cp5[-1] == ' ') --cp5 ; #else while (cp3[-1] == cp4[-1]) { --cp3; --cp4; if (cp3[0] != ' ') /* Note if any nonblank */ nbflag = TRUE; /* in right match. */ } cp5 = cp3; /* Erase to EOL ? */ if (nbflag == FALSE && eolexist == TRUE && (req != TRUE)) { while (cp5!=cp1 && cp5[-1]==' ') --cp5; if (cp3-cp5 <= 3) /* Use only if erase is */ cp5 = cp3; /* fewer characters. */ } #endif movecursor(row, cp1 - &vp1->v_text[0]); /* Go to start of line. */ #if REVSTA TTrev(rev); #endif while (cp1 != cp5) { /* Ordinary. */ TTputc(*cp1); ++ttcol; *cp2++ = *cp1++; } if (cp5 != cp3) { /* Erase. */ TTeeol(); while (cp1 < cp3) *cp2++ = *cp1++; } #if REVSTA TTrev(FALSE); #endif vp1->v_flag &= ~VFCHG; /* flag this line as updated */ return(TRUE); #endif } #endif /* not MEMMAP */ /* * Redisplay the mode line for the window pointed to by the "wp". This is the * only routine that has any idea of how the modeline is formatted. You can * change the modeline format by hacking at this routine. Called by "update" * any time there is a dirty window. */ modeline(wp) WINDOW *wp; { register char *cp; register int c; register int n; /* cursor position count */ register BUFFER *bp; register i; /* loop index */ register lchar; /* character to draw line in buffer with */ register firstm; /* is this the first mode? */ char tline[NLINE]; /* buffer for part of mode line */ n = wp->w_toprow+wp->w_ntrows; /* Location. */ vscreen[n]->v_flag |= VFCHG | VFREQ | VFCOL;/* Redraw next time. */ #if COLOR vscreen[n]->v_rfcolor = 0; /* black on */ vscreen[n]->v_rbcolor = 7; /* white.....*/ #endif vtmove(n, 0); /* Seek to right line. */ if (wp == curwp) /* mark the current buffer */ lchar = '='; else #if REVSTA if (revexist) lchar = ' '; else #endif lchar = '-'; vtputc(lchar); bp = wp->w_bufp; if ((bp->b_flag&BFCHG) != 0) /* "*" if changed. */ vtputc('*'); else vtputc(lchar); n = 2; strcpy(tline, " NCSA MicroEMACS"); /* Buffer name. */ strcat(tline, " ("); /* display the modes */ firstm = TRUE; for (i = 0; i < NUMMODES; i++) /* add in the mode flags */ if (wp->w_bufp->b_mode & (1 << i)) { if (firstm != TRUE) strcat(tline, " "); firstm = FALSE; strcat(tline, modename[i]); } strcat(tline,") "); cp = &tline[0]; while ((c = *cp++) != 0) { vtputc(c); ++n; } #if 0 vtputc(lchar); vtputc((wp->w_flag&WFCOLR) != 0 ? 'C' : lchar); vtputc((wp->w_flag&WFMODE) != 0 ? 'M' : lchar); vtputc((wp->w_flag&WFHARD) != 0 ? 'H' : lchar); vtputc((wp->w_flag&WFEDIT) != 0 ? 'E' : lchar); vtputc((wp->w_flag&WFMOVE) != 0 ? 'V' : lchar); vtputc((wp->w_flag&WFFORCE) != 0 ? 'F' : lchar); vtputc(lchar); n += 8; #endif vtputc(lchar); vtputc(lchar); vtputc(' '); n += 3; cp = &bp->b_bname[0]; while ((c = *cp++) != 0) { vtputc(c); ++n; } vtputc(' '); vtputc(lchar); vtputc(lchar); n += 3; if (bp->b_fname[0] != 0) /* File name. */ { vtputc(' '); ++n; cp = "File: "; while ((c = *cp++) != 0) { vtputc(c); ++n; } cp = &bp->b_fname[0]; while ((c = *cp++) != 0) { vtputc(c); ++n; } vtputc(' '); ++n; } while (n < term.t_ncol) /* Pad to full width. */ { vtputc(lchar); ++n; } } upmode() /* update all the mode lines */ { register WINDOW *wp; #if CRAY /* tell workstation the current modes */ report_modes() ; #endif wp = wheadp; while (wp != NULL) { wp->w_flag |= WFMODE; wp = wp->w_wndp; } } /* * Send a command to the terminal to move the hardware cursor to row "row" * and column "col". The row and column arguments are origin 0. Optimize out * random calls. Update "ttrow" and "ttcol". */ movecursor(row, col) { #if CRAY /* because local <--> cray is line buffered */ ttrow = row ; ttcol = col ; TTmove(row, col) ; #else if (row!=ttrow || col!=ttcol) { ttrow = row; ttcol = col; TTmove(row, col); } #endif } /* * Erase the message line. This is a special routine because the message line * is not considered to be part of the virtual screen. It always works * immediately; the terminal buffer is flushed via a call to the flusher. */ mlerase() { int i; movecursor(term.t_nrow, 0); #if COLOR TTforg(7); TTbacg(0); #endif if (eolexist == TRUE) TTeeol(); else { for (i = 0; i < term.t_ncol - 1; i++) TTputc(' '); movecursor(term.t_nrow, 1); /* force the move! */ movecursor(term.t_nrow, 0); } TTflush(); mpresf = FALSE; } /* * Write a message into the message line. Keep track of the physical cursor * position. A small class of printf like format items is handled. Assumes the * stack grows down; this assumption is made by the "++" in the argument scan * loop. Set the "message line" flag TRUE. */ mlwrite(fmt, arg) char *fmt; { register int c; register char *ap; #if COLOR TTforg(7); TTbacg(0); #endif if (eolexist == FALSE) { mlerase(); TTflush(); } movecursor(term.t_nrow, 0); ap = (char *) &arg; while ((c = *fmt++) != 0) { if (c != '%') { TTputc(c); ++ttcol; } else { c = *fmt++; switch (c) { case 'd': mlputi(*(int *)ap, 10); ap += sizeof(int); break; case 'o': mlputi(*(int *)ap, 8); ap += sizeof(int); break; case 'x': mlputi(*(int *)ap, 16); ap += sizeof(int); break; case 'D': mlputli(*(long *)ap, 10); ap += sizeof(long); break; case 's': mlputs(*(char **)ap); ap += sizeof(char *); break; case 'f': mlputf(*(int *)ap); ap += sizeof(int); break; default: TTputc(c); ++ttcol; } } } if (eolexist == TRUE) TTeeol(); TTflush(); mpresf = TRUE; } /* * Write out a string. Update the physical cursor position. This assumes that * the characters in the string all have width "1"; if this is not the case * things will get screwed up a little. */ mlputs(s) char *s; { register int c; while ((c = *s++) != 0) { TTputc(c); ++ttcol; } } /* * Write out an integer, in the specified radix. Update the physical cursor * position. */ mlputi(i, r) { register int q; static char hexdigits[] = "0123456789ABCDEF"; if (i < 0) { i = -i; TTputc('-'); } q = i/r; if (q != 0) mlputi(q, r); TTputc(hexdigits[i%r]); ++ttcol; } /* * do the same except as a long integer. */ mlputli(l, r) long l; { register long q; if (l < 0) { l = -l; TTputc('-'); } q = l/r; if (q != 0) mlputli(q, r); TTputc((int)(l%r)+'0'); ++ttcol; } /* * write out a scaled integer with two decimal places */ mlputf(s) int s; /* scaled integer to output */ { int i; /* integer portion of number */ int f; /* fractional portion of number */ /* break it up */ i = s / 100; f = s % 100; /* send out the integer portion */ mlputi(i, 10); TTputc('.'); TTputc((f / 10) + '0'); TTputc((f % 10) + '0'); ttcol += 3; } #if RAINBOW putline(row, col, buf) int row, col; char buf[]; { int n; n = strlen(buf); if (col + n - 1 > term.t_ncol) n = term.t_ncol - col + 1; Put_Data(row, col, n, buf); } #endif @//E*O*F displa.c// chmod u=rw,g=r,o=r displa.c echo x - dolock.c sed 's/^@//' > "dolock.c" <<'@//E*O*F dolock.c//' #if 0 /* dolock: MDBS specific Unix 4.2BSD file locking mechinism this is not to be distributed generally */ #include #include #include #include /* included by port.h: mdbs.h, mdbsio.h, sys/types.h, sys/stat.h */ #ifndef bsdunix char *dolock(){return(NULL);} char *undolock(){return(NULL);} #else #include #include extern int errno; #define LOCKDIR ".xlk" #define LOCKMSG "LOCK ERROR -- " #define LOCKMSZ sizeof(LOCKMSG) #define LOCKERR(s) { strcat(lmsg,s); oldumask = umask(oldumask); return(lmsg); } /********************** * * dolock -- lock the file fname * * if successful, returns NULL * if file locked, returns username of person locking the file * if other error, returns "LOCK ERROR: explanation" * * Jon Reid, 2/19/86 * *********************/ BOOL parent = FALSE; BOOL tellall = FALSE; char *gtname(filespec) /* get name component of unix-style filespec */ char *filespec; { char *rname, *rindex(); rname = rindex(filespec,'/'); if (rname != NULL) return(rname); else return(filespec); } char *getpath(filespec) char *filespec; { char rbuff[LFILEN]; char *rname, *rindex(); strcpy(rbuff,filespec); rname = rindex(rbuff,'/'); if (rname == NULL) return(NULL); else { *(++rname) = '\0'; return(rbuff); } } char *dolock(fname) char *fname; { static char lockname[LFILEN] = LOCKDIR; static char username[12]; static char lmsg[40] = LOCKMSG; char *pathfmt; struct stat statblk; struct passwd *pblk; long pid, getpid(); FILE *lf, *fopen(); int oldumask; oldumask = umask(0); /* maximum access allowed to lock files */ if (*fname != '/') pathfmt = "./%s%s"; else pathfmt = "%s/%s"; sprintf(lockname,pathfmt,getpath(fname), LOCKDIR); if (tellall) printf("checking for existence of %s\n",lockname); if (stat(lockname,&statblk)) { if (tellall) printf("making directory %s\n",lockname); mkdir(lockname,0777); } sprintf(lockname,"%s/%s",lockname,gtname(fname)); if (tellall) printf("checking for existence of %s\n",lockname); if (stat(lockname,&statblk)) { makelock: if (tellall) printf("creating %s\n",lockname); if ((lf = fopen(lockname,FOP_TW)) == NULL) LOCKERR("could not create lock file") else { if (parent) pid = getppid(); /* parent pid */ else pid = getpid(); /* current pid */ if (tellall) printf("pid is %ld\n",pid); fprintf(lf,"%ld",pid); /* write pid to lock file */ fclose(lf); oldumask = umask(oldumask); return(NULL); } } else { if (tellall) printf("reading lock file %s\n",lockname); if ((lf = fopen(lockname,FOP_TR)) == NULL) LOCKERR("could not read lock file") else { fscanf(lf,"%ld",&pid); /* contains current pid */ fclose(lf); if (tellall) printf("pid in %s is %ld\n",lockname, pid); if (tellall) printf("signaling process %ld\n", pid); if (kill(pid,0)) switch (errno) { case ESRCH: /* process not found */ goto makelock; break; case EPERM: /* process exists, not yours */ if (tellall) puts("process exists"); break; default: LOCKERR("kill was bad") break; } else if (tellall) puts("kill was good; process exists"); } if ((pblk = getpwuid(statblk.st_uid)) == NULL) sprintf(username,"uid %d",atoi(statblk.st_uid)); else strcpy(username,pblk->pw_name); oldumask = umask(oldumask); return(username); } } /********************** * * undolock -- unlock the file fname * * if successful, returns NULL * if other error, returns "LOCK ERROR: explanation" * * Jon Reid, 2/19/86 * *********************/ char *undolock(fname) char *fname; { static char lockname[LFILEN] = LOCKDIR; static char lmsg[40] = LOCKMSG; char *pathfmt; if (*fname != '/') pathfmt = "./%s%s"; else pathfmt = "%s/%s"; sprintf(lockname,pathfmt,getpath(fname), LOCKDIR); sprintf(lockname,"%s/%s",lockname,gtname(fname)); if (tellall) printf("attempting to unlink %s\n",lockname); if (unlink(lockname)) { strcat(lmsg,"could not remove lock file"); return(lmsg); } else return(NULL); } #endif bsdunix /****************** * end dolock module *******************/ #else dolhello() { } #endif @//E*O*F dolock.c// chmod u=rw,g=r,o=r dolock.c echo x - egapc.c sed 's/^@//' > "egapc.c" <<'@//E*O*F egapc.c//' /* * The routines in this file provide support for the IBM-PC EGA and other * compatible terminals. It goes directly to the graphics RAM to do * screen output. It compiles into nothing if not an IBM-PC EGA driver */ #define termdef 1 /* don't define "term" external */ #include #include "estruc.h" #include "edef.h" #if EGA #define NROW 43 /* Screen size. */ #define NCOL 80 /* Edit if you want to. */ #define MARGIN 8 /* size of minimim margin and */ #define SCRSIZ 64 /* scroll size for extended lines */ #define NPAUSE 200 /* # times thru update to pause */ #define BEL 0x07 /* BEL character. */ #define ESC 0x1B /* ESC character. */ #define SPACE 32 /* space character */ #define SCADD 0xb8000000L /* address of screen RAM */ int *scptr[NROW]; /* pointer to screen lines */ int sline[NCOL]; /* screen line image */ extern int ttopen(); /* Forward references. */ extern int ttgetc(); extern int ttputc(); extern int ttflush(); extern int ttclose(); extern int egakopen(); extern int egakclose(); extern int egamove(); extern int egaeeol(); extern int egaeeop(); extern int egabeep(); extern int egaopen(); extern int egarev(); extern int egacres(); extern int egaclose(); extern int egaputc(); #if COLOR extern int egafcol(); extern int egabcol(); int cfcolor = -1; /* current forground color */ int cbcolor = -1; /* current background color */ int ctrans[] = /* ansi to ega color translation table */ {0, 4, 2, 6, 1, 5, 3, 7}; #endif /* * Standard terminal interface dispatch table. Most of the fields point into * "termio" code. */ TERM term = { NROW-1, NROW-1, NCOL, NCOL, MARGIN, SCRSIZ, NPAUSE, egaopen, egaclose, egakopen, egakclose, ttgetc, egaputc, ttflush, egamove, egaeeol, egaeeop, egabeep, egarev, egacres #if COLOR , egafcol, egabcol #endif }; extern union REGS rg; #if COLOR egafcol(color) /* set the current output color */ int color; /* color to set */ { cfcolor = ctrans[color]; } egabcol(color) /* set the current background color */ int color; /* color to set */ { cbcolor = ctrans[color]; } #endif egamove(row, col) { rg.h.ah = 2; /* set cursor position function code */ rg.h.dl = col; rg.h.dh = row; rg.h.bh = 0; /* set screen page number */ int86(0x10, &rg, &rg); } egaeeol() /* erase to the end of the line */ { int attr; /* attribute byte mask to place in RAM */ int *lnptr; /* pointer to the destination line */ int i; int ccol; /* current column cursor lives */ int crow; /* row */ /* find the current cursor position */ rg.h.ah = 3; /* read cursor position function code */ rg.h.bh = 0; /* current video page */ int86(0x10, &rg, &rg); ccol = rg.h.dl; /* record current column */ crow = rg.h.dh; /* and row */ /* build the attribute byte and setup the screen pointer */ #if COLOR attr = (((cbcolor & 15) << 4) | (cfcolor & 15)) << 8; #else attr = 0x0700; #endif lnptr = &sline[0]; for (i=0; i < NCOL; i++) *lnptr++ = SPACE | attr; if (flickcode) { /* wait for vertical retrace to be off */ while ((inp(0x3da) & 8)) ; /* and to be back on */ while ((inp(0x3da) & 8) == 0) ; } /* and send the string out */ movmem(&sline[0], scptr[crow]+ccol, (NCOL-ccol)*2); } egaputc(ch) /* put a character at the current position in the current colors */ int ch; { rg.h.ah = 14; /* write char to screen with current attrs */ rg.h.al = ch; #if COLOR rg.h.bl = cfcolor; #else rg.h.bl = 0x07; #endif int86(0x10, &rg, &rg); } egaeeop() { int attr; /* attribute to fill screen with */ rg.h.ah = 6; /* scroll page up function code */ rg.h.al = 0; /* # lines to scroll (clear it) */ rg.x.cx = 0; /* upper left corner of scroll */ rg.x.dx = 0x2a4f; /* lower right corner of scroll */ #if COLOR attr = ((ctrans[gbcolor] & 15) << 4) | (ctrans[gfcolor] & 15); #else attr = 0; #endif rg.h.bh = attr; int86(0x10, &rg, &rg); } egarev(state) /* change reverse video state */ int state; /* TRUE = reverse, FALSE = normal */ { /* This never gets used under the ega-PC driver */ } egacres() /* change screen resolution */ { return(TRUE); } egabeep() { bdos(6, BEL, 0); } egaopen() { char buf; /* buffer for peek/poke */ /* initialize pointers to the screen ram */ scinit(); /* and put the beast into EGA 43 row mode */ rg.x.ax = 3; int86(0x10, &rg, &rg); rg.x.ax = 0x1112; rg.h.bl = 0; int86(0x10, &rg, &rg); peek(0x40, 0x87, &buf, 1); buf |= 1; poke(0x40, 0x87, &buf, 1); buf = 0xf8; poke(0x40, 0x88, &buf, 1); rg.x.ax = 0x0100; rg.h.bh = 0; rg.x.cx = 0x0007; int86(0x10, &rg, &rg); buf = 0xf9; poke(0x40, 0x88, &buf, 1); strcpy(sres, "43LINE"); revexist = TRUE; ttopen(); } egaclose() { char buf; /* buffer for peek/poke */ #if COLOR egafcol(7); egabcol(0); #endif /* and put the beast into 80 column mode */ rg.x.ax = 0002; int86(0x10, &rg, &rg); ttclose(); #if 0 peek(0x40, 0x87, &buf, 1); buf--; poke(0x40, 0x87, &buf, 1); #endif /* and restore the normal cursor */ rg.x.ax = 0x0100; rg.h.bl = 0; rg.x.cx = 0x0b0d; int86(0x10, &rg, &rg); } egakopen() { } egakclose() { } scinit() /* initialize the screen head pointers */ { union { long laddr; /* long form of address */ int *paddr; /* pointer form of address */ } addr; int i; /* initialize the screen pointer array */ for (i = 0; i < NROW; i++) { addr.laddr = SCADD + (long)(NCOL * i * 2); scptr[i] = addr.paddr; } } scwrite(row, outstr, forg, bacg) /* write a line out*/ int row; /* row of screen to place outstr on */ char *outstr; /* string to write out (must be NCOL long) */ int forg; /* forground color of string to write */ int bacg; /* background color */ { int attr; /* attribute byte mask to place in RAM */ int *lnptr; /* pointer to the destination line */ int i; /* build the attribute byte and setup the screen pointer */ #if COLOR attr = (((ctrans[bacg] & 15) << 4) | (ctrans[forg] & 15)) << 8; #else attr = (((bacg & 15) << 4) | (forg & 15)) << 8; #endif lnptr = &sline[0]; for (i=0; i "eval.c" <<'@//E*O*F eval.c//' /* EVAL.C: Expresion evaluation functions for MicroEMACS written 1986 by Daniel Lawrence */ #include #include "estruc.h" #include "edef.h" #include "evar.h" #if MEGAMAX & ST520 overlay "eval" #endif char value[80]; /* buffer to return value in */ varinit() /* initialize the user variable list */ { register int i; for (i=0; i < MAXVARS; i++) uv[i].u_name[0] = 0; } char *gtfun(fname) /* evaluate a function */ char *fname; /* name of function to evaluate */ { register int fnum; /* index to function to eval */ register int status; /* return status */ char arg1[NSTRING]; /* value of first argument */ char arg2[NSTRING]; /* value of second argument */ char arg3[NSTRING]; /* value of third argument */ static char result[2 * NSTRING]; /* string result */ /* look the function up in the function table */ fname[3] = 0; /* only first 3 chars significant */ for (fnum = 0; fnum < NFUNCS; fnum++) if (strcmp(fname, funcs[fnum].f_name) == 0) break; /* return errorm on a bad reference */ if (fnum == NFUNCS) return(errorm); /* retrieve the first argument */ if ((status = macarg(arg1)) != TRUE) return(errorm); /* if needed, retrieve the second argument */ if (funcs[fnum].f_type >= DYNAMIC) { if ((status = macarg(arg2)) != TRUE) return(errorm); /* if needed, retrieve the third argument */ if (funcs[fnum].f_type >= TRINAMIC) if ((status = macarg(arg3)) != TRUE) return(errorm); } /* and now evaluate it! */ switch (fnum) { case UFADD: return(itoa(atoi(arg1) + atoi(arg2))); case UFSUB: return(itoa(atoi(arg1) - atoi(arg2))); case UFTIMES: return(itoa(atoi(arg1) * atoi(arg2))); case UFDIV: return(itoa(atoi(arg1) / atoi(arg2))); case UFMOD: return(itoa(atoi(arg1) % atoi(arg2))); case UFNEG: return(itoa(-atoi(arg1))); case UFCAT: strcpy(result, arg1); return(strcat(result, arg2)); case UFLEFT: return(strncpy(result, arg1, atoi(arg2))); case UFRIGHT: return(strcpy(result, &arg1[atoi(arg2)-1])); case UFMID: return(strncpy(result, &arg1[atoi(arg2)-1], atoi(arg3))); case UFNOT: return(ltos(stol(arg1) == FALSE)); case UFEQUAL: return(ltos(atoi(arg1) == atoi(arg2))); case UFLESS: return(ltos(atoi(arg1) < atoi(arg2))); case UFGREATER: return(ltos(atoi(arg1) > atoi(arg2))); case UFSEQUAL: return(ltos(strcmp(arg1, arg2) == 0)); case UFSLESS: return(ltos(strcmp(arg1, arg2) < 0)); case UFSGREAT: return(ltos(strcmp(arg1, arg2) > 0)); case UFIND: return(getval(arg1)); } exit(-11); /* never should get here */ } char *gtusr(vname) /* look up a user var's value */ char *vname; /* name of user variable to fetch */ { register int vnum; /* ordinal number of user var */ /* scan the list looking for the user var name */ for (vnum = 0; vnum < MAXVARS; vnum++) if (strcmp(vname, uv[vnum].u_name) == 0) break; /* return errorm on a bad reference */ if (vnum == MAXVARS) return(errorm); return(uv[vnum].u_value); } char *gtenv(vname) char *vname; /* name of environment variable to retrieve */ { register int vnum; /* ordinal number of var refrenced */ /* scan the list, looking for the referenced name */ for (vnum = 0; vnum < NEVARS; vnum++) if (strcmp(vname, envars[vnum]) == 0) break; /* return errorm on a bad reference */ if (vnum == NEVARS) return(errorm); /* otherwise, fetch the appropriate value */ switch (vnum) { case EVFILLCOL: return(itoa(fillcol)); case EVPAGELEN: return(itoa(term.t_nrow + 1)); case EVCURCOL: return(itoa(getccol(FALSE))); case EVCURLINE: return(itoa(getcline())); case EVRAM: return(itoa((int)(envram / 1024l))); case EVFLICKER: return(ltos(flickcode)); case EVCURWIDTH:return(itoa(term.t_nrow)); case EVCBUFNAME:return(curbp->b_bname); case EVCFNAME: return(curbp->b_fname); case EVSRES: return(sres); case EVDEBUG: return(ltos(macbug)); case EVSTATUS: return(ltos(cmdstatus)); } } int setvar(f, n) /* set a variable */ int f; /* default flag */ int n; /* numeric arg (can overide prompted value) */ { register int vnum; /* ordinal number of var refrenced */ register int status; /* status return */ register int vtype; /* type of variable to set */ register char * sp; /* scratch string pointer */ char var[NVSIZE+1]; /* name of variable to fetch */ char value[NSTRING]; /* value to set variable to */ /* first get the variable to set.. */ if (clexec == FALSE) { status = mlreply("Variable to set: ", &var[0], NVSIZE); if (status != TRUE) return(status); } else { /* macro line argument */ /* grab token and skip it */ execstr = token(execstr, var); } /* check the legality and find the var */ sv01: vtype = -1; switch (var[0]) { case '$': /* check for legal enviromnent var */ for (vnum = 0; vnum < NEVARS; vnum++) if (strcmp(&var[1], envars[vnum]) == 0) { vtype = TKENV; break; } break; case '%': /* check for existing legal user variable */ for (vnum = 0; vnum < MAXVARS; vnum++) if (strcmp(&var[1], uv[vnum].u_name) == 0) { vtype = TKVAR; break; } if (vnum < MAXVARS) break; /* create a new one??? */ for (vnum = 0; vnum < MAXVARS; vnum++) if (uv[vnum].u_name[0] == 0) { vtype = TKVAR; strcpy(uv[vnum].u_name, &var[1]); break; } break; case '&': /* indirect operator? */ var[4] = 0; if (strcmp(&var[1], "ind") == 0) { /* grab token, and eval it */ execstr = token(execstr, var); strcpy(var, getval(var)); goto sv01; } } /* if its not legal....bitch */ if (vtype == -1) { mlwrite("%%No such variable"); return(FALSE); } /* get the value for that variable */ if (f == TRUE) strcpy(value, itoa(n)); else { status = mlreply("Value: ", &value[0], NSTRING); if (status != TRUE) return(status); } /* and set the appropriate value */ status = TRUE; switch (vtype) { case TKVAR: /* set a user variable */ if (uv[vnum].u_value != NULL) free(uv[vnum].u_value); sp = malloc(strlen(value) + 1); if (sp == NULL) return(FALSE); strcpy(sp, value); uv[vnum].u_value = sp; break; case TKENV: /* set an environment variable */ status = TRUE; /* by default */ switch (vnum) { case EVFILLCOL: fillcol = atoi(value); break; case EVPAGELEN: status = newsize(TRUE, atoi(value)); break; case EVCURCOL: status = setccol(atoi(value)); break; case EVCURLINE: status = gotoline(TRUE, atoi(value)); break; case EVRAM: break; case EVFLICKER: flickcode = stol(value); break; case EVCURWIDTH:status = newwidth(TRUE, atoi(value)); break; case EVCBUFNAME:strcpy(curbp->b_bname, value); curwp->w_flag |= WFMODE; break; case EVCFNAME: strcpy(curbp->b_fname, value); curwp->w_flag |= WFMODE; break; case EVSRES: status = TTrez(value); break; case EVDEBUG: macbug = stol(value); break; case EVSTATUS: cmdstatus = stol(value); break; } break; } return(status); } /* atoi: ascii string to integer......This is too inconsistant to use the system's */ atoi(st) char *st; { int result; /* resulting number */ int sign; /* sign of resulting number */ char c; /* current char being examined */ result = 0; sign = 1; while ((c = *st++)) { if (c == '-') sign *= -1; if (c >= '0' && c <= '9') result = result * 10 + c - '0'; } return(result * sign); } /* itoa: integer to ascii string.......... This is too inconsistant to use the system's */ char *itoa(i) int i; /* integer to translate to a string */ { register int digit; /* current digit being used */ register char *sp; /* pointer into result */ register int sign; /* sign of resulting number */ static char result[INTWIDTH+1]; /* resulting string */ /* eliminate the trivial 0 */ if (i == 0) return("0"); /* record the sign...*/ sign = 1; if (i < 0) { sign = -1; i = -i; } /* and build the string (backwards!) */ sp = result + INTWIDTH; *sp = 0; while (i) { digit = i % 10; *(--sp) = '0' + digit; /* and install the new digit */ i = i / 10; } /* and fix the sign */ if (sign == -1) { *(--sp) = '-'; /* and install the minus sign */ } return(sp); } int gettyp(token) /* find the type of a passed token */ char *token; /* token to analyze */ { register char c; /* first char in token */ /* grab the first char (this is all we need) */ c = *token; /* no blanks!!! */ if (c == 0) return(TKNUL); /* a numeric literal? */ if (c >= '0' && c <= '9') return(TKLIT); switch (c) { case '"': return(TKSTR); case '!': return(TKDIR); case '@': return(TKARG); case '#': return(TKBUF); case '$': return(TKENV); case '%': return(TKVAR); case '&': return(TKFUN); case '*': return(TKLBL); default: return(TKCMD); } } char *getval(token) /* find the value of a token */ char *token; /* token to evaluate */ { register int status; /* error return */ register BUFFER *bp; /* temp buffer pointer */ register int blen; /* length of buffer argument */ char buf[NSTRING]; /* string buffer for some returns */ switch (gettyp(token)) { case TKNUL: return(""); case TKARG: /* interactive argument */ status = getstring(getval(&token[1]), buf, NSTRING, ctoec('\n')); if (status == ABORT) return(errorm); return(buf); case TKBUF: /* buffer contents fetch */ /* grab the right buffer */ bp = bfind(getval(&token[1]), FALSE, 0); if (bp == NULL) return(errorm); /* make sure we are not at the end */ if (bp->b_linep == bp->b_dotp) return(errorm); /* grab the line as an argument */ blen = bp->b_dotp->l_used; if (blen > NSTRING) blen = NSTRING; strncpy(buf, bp->b_dotp->l_text, blen); buf[blen] = 0; /* and step the buffer's line ptr ahead a line */ bp->b_dotp = bp->b_dotp->l_fp; bp->b_doto = 0; /* and return the spoils */ return(buf); case TKVAR: return(gtusr(token+1)); case TKENV: return(gtenv(token+1)); case TKFUN: return(gtfun(token+1)); case TKDIR: return(errorm); case TKLBL: return(itoa(gtlbl(token))); case TKLIT: return(token); case TKSTR: return(token+1); case TKCMD: return(token); } } gtlbl(token) /* find the line number of the given label */ char *token; /* label name to find */ { return(1); } int stol(val) /* convert a string to a numeric logical */ char *val; /* value to check for stol */ { /* check for logical values */ if (val[0] == 'F') return(FALSE); if (val[0] == 'T') return(TRUE); /* check for numeric truth (!= 0) */ return((atoi(val) != 0)); } char *ltos(val) /* numeric logical to string logical */ int val; /* value to translate */ { if (val) return(truem); else return(falsem); } @//E*O*F eval.c// chmod u=rw,g=r,o=r eval.c echo x - exec.c sed 's/^@//' > "exec.c" <<'@//E*O*F exec.c//' /* This file is for functions dealing with execution of commands, command lines, buffers, files and startup files written 1986 by Daniel Lawrence */ #include #include "estruc.h" #include "edef.h" #if MEGAMAX & ST520 overlay "exec" #endif #if DEBUGM char outline[NSTRING]; /* global string to hold debug line text */ #endif /* namedcmd: execute a named command even if it is not bound */ namedcmd(f, n) int f, n; /* command arguments [passed through to command executed] */ { register (*kfunc)(); /* ptr to the requexted function to bind to */ int (*getname())(); /* prompt the user to type a named command */ mlwrite(": "); /* and now get the function name to execute */ #if CRAY sends("\\(I)") ; /* immediate mode on */ kfunc = getname(); sends("\\(i)") ; /* immediate mode off */ #else kfunc = getname(); #endif if (kfunc == NULL) { mlwrite("[No such function]"); return(FALSE); } /* and then execute the command */ return((*kfunc)(f, n)); } /* execcmd: Execute a command line command to be typed in by the user */ execcmd(f, n) int f, n; /* default Flag and Numeric argument */ { register int status; /* status return */ char cmdstr[NSTRING]; /* string holding command to execute */ /* get the line wanted */ if ((status = mlreply(": ", cmdstr, NSTRING)) != TRUE) return(status); execlevel = 0; return(docmd(cmdstr)); } /* docmd: take a passed string as a command line and translate it to be executed as a command. This function will be used by execute-command-line and by all source and startup files. Lastflag/thisflag is also updated. format of the command line is: {# arg} {} Directives start with a "!" and include: !endm End a macro !if (cond) conditional execution !else !endif !return Return (terminating current macro) !goto