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- /*
- * This file contains the command processing functions for a number of random
- * commands. There is no functional grouping here, for sure.
- */
-
- #include <stdio.h>
- #include "estruct.h"
- #include "eproto.h"
- #include "edef.h"
- #include "elang.h"
-
- /*
- * Set fill column to n.
- */
- PASCAL NEAR setfillcol(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- fillcol = n;
- mlwrite(TEXT59,n);
- /* "[Fill column is %d]" */
- return(TRUE);
- }
-
- /*
- * Display the current position of the cursor, in origin 1 X-Y coordinates,
- * the character that is under the cursor (in hex), and the fraction of the
- * text that is before the cursor. The displayed column is not the current
- * column, but the column that would be used on an infinite width display.
- * Normally this is bound to "C-X =".
- */
- PASCAL NEAR showcpos(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *lp; /* current line */
- register long numchars; /* # of chars in file */
- register int numlines; /* # of lines in file */
- register long predchars; /* # chars preceding point */
- register int predlines; /* # lines preceding point */
- register int curchar; /* character under cursor */
- int ratio;
- int col;
- int savepos; /* temp save for current offset */
- int ecol; /* column pos/end of current line */
-
- /* starting at the beginning of the buffer */
- lp = lforw(curbp->b_linep);
- curchar = '\r';
-
- /* start counting chars and lines */
- numchars = 0;
- numlines = 0;
- while (lp != curbp->b_linep) {
- /* if we are on the current line, record it */
- if (lp == curwp->w_dotp) {
- predlines = numlines;
- predchars = numchars + curwp->w_doto;
- if ((curwp->w_doto) == llength(lp))
- curchar = '\r';
- else
- curchar = lgetc(lp, curwp->w_doto);
- }
- /* on to the next line */
- ++numlines;
- numchars += llength(lp) + 1;
- lp = lforw(lp);
- }
-
- /* if at end of file, record it */
- if (curwp->w_dotp == curbp->b_linep) {
- predlines = numlines;
- predchars = numchars;
- }
-
- /* Get real column and end-of-line column. */
- col = getccol(FALSE);
- savepos = curwp->w_doto;
- curwp->w_doto = llength(curwp->w_dotp);
- ecol = getccol(FALSE);
- curwp->w_doto = savepos;
-
- ratio = 0; /* Ratio before dot. */
- if (numchars != 0)
- ratio = (100L*predchars) / numchars;
-
- /* summarize and report the info */
- #if DBCS
- if (is2byte(curwp->w_dotp->l_text,
- curwp->w_dotp->l_text + curwp->w_doto)) {
- mlwrite(TEXT220,
- /* "Line %d/%d Col %d/%d Char %D/%D (%d%%) char = 0x%x%x" */
- predlines+1, numlines+1, col, ecol,
- predchars, numchars, ratio, (unsigned char)curchar,
- (unsigned char)(curwp->w_dotp->l_text[curwp->w_doto+1]));
- return(TRUE);
- }
- #endif
- mlwrite(TEXT60,
- /* "Line %d/%d Col %d/%d Char %D/%D (%d%%) char = 0x%x" */
- predlines+1, numlines+1, col, ecol,
- predchars, numchars, ratio, curchar);
- return(TRUE);
- }
-
- PASCAL NEAR getlinenum(bp, sline) /* get the a line number */
-
- BUFFER *bp; /* buffer to get current line from */
- LINE *sline; /* line to search for */
-
- {
- register LINE *lp; /* current line */
- register int numlines; /* # of lines before point */
-
- /* starting at the beginning of the buffer */
- lp = lforw(bp->b_linep);
-
- /* start counting lines */
- numlines = 0;
- while (lp != bp->b_linep) {
- /* if we are on the current line, record it */
- if (lp == sline)
- break;
- ++numlines;
- lp = lforw(lp);
- }
-
- /* and return the resulting count */
- return(numlines + 1);
- }
-
- /*
- * Return current column. Stop at first non-blank given TRUE argument.
- */
- PASCAL NEAR getccol(bflg)
- int bflg;
- {
- register int c, i, col;
- col = 0;
- for (i=0; i<curwp->w_doto; ++i) {
- c = lgetc(curwp->w_dotp, i);
- if (c!=' ' && c!='\t' && bflg)
- break;
- if (c == '\t')
- col += -(col % tabsize) + (tabsize - 1);
- else if (c<0x20 || c==0x7F)
- ++col;
- ++col;
- }
- return(col);
- }
-
- /*
- * Set current column.
- */
- PASCAL NEAR setccol(pos)
-
- int pos; /* position to set cursor */
-
- {
- register int c; /* character being scanned */
- register int i; /* index into current line */
- register int col; /* current cursor column */
- register int llen; /* length of line in bytes */
-
- col = 0;
- llen = llength(curwp->w_dotp);
-
- /* scan the line until we are at or past the target column */
- for (i = 0; i < llen; ++i) {
- /* upon reaching the target, drop out */
- if (col >= pos)
- break;
-
- /* advance one character */
- c = lgetc(curwp->w_dotp, i);
- if (c == '\t')
- col += -(col % tabsize) + (tabsize - 1);
- else if (c<0x20 || c==0x7F)
- ++col;
- ++col;
- }
-
- /* set us at the new position */
- curwp->w_doto = i;
-
- /* and tell weather we made it */
- return(col >= pos);
- }
-
- /*
- * Twiddle the two characters on either side of dot. If dot is at the end of
- * the line twiddle the two characters before it. Return with an error if dot
- * is at the beginning of line; it seems to be a bit pointless to make this
- * work. This fixes up a very common typo with a single stroke. Normally bound
- * to "C-T". This always works within a line, so "WFEDIT" is good enough.
- */
- PASCAL NEAR twiddle(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *dotp;
- register int doto;
- register int cl;
- register int cr;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- dotp = curwp->w_dotp;
- doto = curwp->w_doto;
- if (doto==llength(dotp) && --doto<0)
- return(FALSE);
- cr = lgetc(dotp, doto);
- if (--doto < 0)
- return(FALSE);
- cl = lgetc(dotp, doto);
- lputc(dotp, doto+0, cr);
- lputc(dotp, doto+1, cl);
- lchange(WFEDIT);
- return(TRUE);
- }
-
- /*
- * Quote the next character, and insert it into the buffer. All the characters
- * are taken literally, including the newline, which does not then have
- * its line splitting meaning. The character is always read, even if it is
- * inserted 0 times, for regularity. Bound to "C-Q"
- */
-
- PASCAL NEAR quote(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int c;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- c = tgetc();
- if (n < 0)
- return(FALSE);
- if (n == 0)
- return(TRUE);
- return(linsert(n, c));
- }
-
- /*
- * Set tab size if given non-default argument (n <> 1). Otherwise, insert a
- * tab into file. If given argument, n, of zero, change to hard tabs.
- * If n > 1, simulate tab stop every n-characters using spaces. This has to be
- * done in this slightly funny way because the tab (in ASCII) has been turned
- * into "C-I" (in 10 bit code) already. Bound to "C-I".
- */
- PASCAL NEAR tab(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- if (n < 0)
- return(FALSE);
- if (n == 0 || n > 1) {
- stabsize = n;
- return(TRUE);
- }
- if (!stabsize)
- return(linsert(1, '\t'));
- return(linsert(stabsize - (getccol(FALSE) % stabsize), ' '));
- }
-
- PASCAL NEAR detab(f, n) /* change tabs to spaces */
-
- int f,n; /* default flag and numeric repeat count */
-
- {
- register int inc; /* increment to next line [sgn(n)] */
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
-
- if (f == FALSE)
- n = reglines();
-
- /* loop thru detabbing n lines */
- inc = ((n > 0) ? 1 : -1);
- while (n) {
- curwp->w_doto = 0; /* start at the beginning */
-
- /* detab the entire current line */
- while (curwp->w_doto < llength(curwp->w_dotp)) {
- /* if we have a tab */
- if (lgetc(curwp->w_dotp, curwp->w_doto) == '\t') {
- ldelete(1L, FALSE);
- /* insspace(TRUE, 8 - (curwp->w_doto & 7));*/
- insspace(TRUE, tabsize - (curwp->w_doto % tabsize));
- }
- forwchar(FALSE, 1);
- }
-
- /* advance/or back to the next line */
- forwline(TRUE, inc);
- n -= inc;
- }
- curwp->w_doto = 0; /* to the begining of the line */
- thisflag &= ~CFCPCN; /* flag that this resets the goal column */
- lchange(WFEDIT); /* yes, we have made at least an edit */
- return(TRUE);
- }
-
-
- PASCAL NEAR entab(f, n) /* change spaces to tabs where posible */
-
- int f,n; /* default flag and numeric repeat count */
-
- {
- register int inc; /* increment to next line [sgn(n)] */
- register int fspace; /* pointer to first space if in a run */
- register int ccol; /* current cursor column */
- register char cchar; /* current character */
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
-
- if (f == FALSE)
- n = reglines();
-
- /* loop thru entabbing n lines */
- inc = ((n > 0) ? 1 : -1);
- while (n) {
- /* entab the entire current line */
-
- ccol = curwp->w_doto = 0; /* start at the beginning */
- fspace = -1;
-
- while (curwp->w_doto < llength(curwp->w_dotp)) {
- /* see if it is time to compress */
- if ((fspace >= 0) && (nextab(fspace) <= ccol))
- if (ccol - fspace < 2)
- fspace = -1;
- else {
- backchar(TRUE, ccol - fspace);
- ldelete((long)(ccol - fspace), FALSE);
- linsert(1, '\t');
- fspace = -1;
- }
-
- /* get the current character */
- cchar = lgetc(curwp->w_dotp, curwp->w_doto);
-
- switch (cchar) {
- case '\t': /* a tab...count em up (no break here) */
- ldelete(1L, FALSE);
- insspace(TRUE, tabsize - (ccol % tabsize));
-
- case ' ': /* a space...compress? */
- if (fspace == -1)
- fspace = ccol;
- break;
-
- default: /* any other char...just count */
- fspace = -1;
- break;
- }
- ccol++;
- forwchar(FALSE, 1);
- }
-
- /* advance/or back to the next line */
- forwline(TRUE, inc);
- n -= inc;
- curwp->w_doto = 0; /* start at the beginning */
- }
- curwp->w_doto = 0; /* to the begining of the line */
- thisflag &= ~CFCPCN; /* flag that this resets the goal column */
- lchange(WFEDIT); /* yes, we have made at least an edit */
- return(TRUE);
- }
-
- /* trim: trim trailing whitespace from the point to eol
- with no arguments, it trims the current region
- */
-
- PASCAL NEAR trim(f, n)
-
- int f,n; /* default flag and numeric repeat count */
-
- {
- register LINE *lp; /* current line pointer */
- register int offset; /* original line offset position */
- register int length; /* current length */
- register int inc; /* increment to next line [sgn(n)] */
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
-
- if (f == FALSE)
- n = reglines();
-
- /* loop thru trimming n lines */
- inc = ((n > 0) ? 1 : -1);
- while (n) {
- lp = curwp->w_dotp; /* find current line text */
- offset = curwp->w_doto; /* save original offset */
- length = lp->l_used; /* find current length */
-
- /* trim the current line */
- while (length > offset) {
- if (lgetc(lp, length-1) != ' ' &&
- lgetc(lp, length-1) != '\t')
- break;
- length--;
- }
- lp->l_used = length;
-
- /* advance/or back to the next line */
- forwline(TRUE, inc);
- n -= inc;
- }
- lchange(WFEDIT);
- thisflag &= ~CFCPCN; /* flag that this resets the goal column */
- return(TRUE);
- }
-
- /*
- * Open up some blank space. The basic plan is to insert a bunch of newlines,
- * and then back up over them. Everything is done by the subcommand
- * procerssors. They even handle the looping. Normally this is bound to "C-O".
- */
- PASCAL NEAR openline(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int i;
- register int s;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return(FALSE);
- if (n == 0)
- return(TRUE);
- i = n; /* Insert newlines. */
- do {
- s = lnewline();
- } while (s==TRUE && --i);
- if (s == TRUE) /* Then back up overtop */
- s = backchar(f, n); /* of them all. */
- return(s);
- }
-
- /*
- * Insert a newline. Bound to "C-M". If we are in CMODE, do automatic
- * indentation as specified.
- */
- PASCAL NEAR newline(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int s;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return(FALSE);
-
- /* if we are in C mode and this is a default <NL> */
- if (n == 1 && (curbp->b_mode & MDCMOD) &&
- curwp->w_dotp != curbp->b_linep)
- return(cinsert());
-
- /*
- * If a newline was typed, fill column is defined, the argument is non-
- * negative, wrap mode is enabled, and we are now past fill column,
- * and we are not read-only, perform word wrap.
- */
- if ((curwp->w_bufp->b_mode & MDWRAP) && fillcol > 0 &&
- getccol(FALSE) > fillcol &&
- (curwp->w_bufp->b_mode & MDVIEW) == FALSE)
- execkey(&wraphook, FALSE, 1);
-
- /* insert some lines */
- while (n--) {
- if ((s=lnewline()) != TRUE)
- return(s);
- }
- return(TRUE);
- }
-
- PASCAL NEAR cinsert() /* insert a newline and indentation for C */
-
- {
- register char *cptr; /* string pointer into text to copy */
- register int i; /* index into line to copy indent from */
- register int llen; /* length of line to copy indent from */
- register int bracef; /* was there a brace at the end of line? */
- register LINE *lp; /* current line pointer */
- register int offset;
- char ichar[NSTRING]; /* buffer to hold indent of last line */
-
- /* trim the whitespace before the point */
- lp = curwp->w_dotp;
- offset = curwp->w_doto;
- while (offset > 0 &&
- (lgetc(lp, offset - 1) == ' ' ||
- lgetc(lp, offset - 1) == '\t')) {
- backdel(FALSE, 1);
- offset--;
- }
-
- /* check for a brace */
- bracef = (offset > 0 && lgetc(lp, offset - 1) == '{');
-
- /* put in the newline */
- if (lnewline() == FALSE)
- return(FALSE);
-
- /* if the new line is not blank... don't indent it! */
- lp = curwp->w_dotp;
- if (lp->l_used != 0)
- return(TRUE);
-
- /* hunt for the last non-blank line to get indentation from */
- while (lp->l_used == 0 && lp != curbp->b_linep)
- lp = lp->l_bp;
-
- /* grab a pointer to text to copy indentation from */
- cptr = &(lp->l_text[0]);
- llen = lp->l_used;
-
- /* save the indent of the last non blank line */
- i = 0;
- while ((i < llen) && (cptr[i] == ' ' || cptr[i] == '\t')
- && (i < NSTRING - 1)) {
- ichar[i] = cptr[i];
- ++i;
- }
- ichar[i] = 0; /* terminate it */
-
- /* insert this saved indentation */
- linstr(ichar);
-
- /* and one more tab for a brace */
- if (bracef)
- tab(FALSE, 1);
-
- return(TRUE);
- }
-
- PASCAL NEAR insbrace(n, c) /* insert a brace into the text here...we are in CMODE */
-
- int n; /* repeat count */
- int c; /* brace to insert (always } for now) */
-
- {
- register int ch; /* last character before input */
- register int oc; /* caractere oppose a c */
- register int i, count;
- register int target; /* column brace should go after */
- register LINE *oldlp;
- register int oldoff;
-
- /* if we aren't at the beginning of the line... */
- if (curwp->w_doto != 0)
-
- /* scan to see if all space before this is white space */
- for (i = curwp->w_doto - 1; i >= 0; --i) {
- ch = lgetc(curwp->w_dotp, i);
- if (ch != ' ' && ch != '\t')
- return(linsert(n, c));
- }
-
- /* chercher le caractere oppose correspondant */
- switch (c) {
- case '}': oc = '{'; break;
- case ']': oc = '['; break;
- case ')': oc = '('; break;
- default: return(FALSE);
- }
-
- oldlp = curwp->w_dotp;
- oldoff = curwp->w_doto;
-
- count = 1; backchar(FALSE, 1);
-
- while (count > 0) {
- if (curwp->w_doto == llength(curwp->w_dotp))
- ch = '\r';
- else
- ch = lgetc(curwp->w_dotp, curwp->w_doto);
-
- if (ch == c) ++count;
- if (ch == oc) --count;
-
- backchar(FALSE, 1);
- if (boundry(curwp->w_dotp, curwp->w_doto, REVERSE))
- break;
- }
-
- if (count != 0) { /* no match */
- curwp->w_dotp = oldlp;
- curwp->w_doto = oldoff;
- return(linsert(n, c));
- }
-
- curwp->w_doto = 0; /* debut de ligne */
- /* aller au debut de la ligne apres la tabulation */
- while ((ch = lgetc(curwp->w_dotp, curwp->w_doto)) == ' ' || ch == '\t')
- forwchar(FALSE, 1);
-
- /* delete back first */
- target = getccol(FALSE); /* c'est l'indent que l'on doit avoir */
- curwp->w_dotp = oldlp;
- curwp->w_doto = oldoff;
-
- while (target != getccol(FALSE)) {
- if (target < getccol(FALSE)) /* on doit detruire des caracteres */
- while (getccol(FALSE) > target)
- backdel(FALSE, 1);
- else { /* on doit en inserer */
- while (target - getccol(FALSE) >= tabsize)
- linsert(1,'\t');
- linsert(target - getccol(FALSE), ' ');
- }
- }
-
- /* and insert the required brace(s) */
- return(linsert(n, c));
- }
-
- PASCAL NEAR inspound() /* insert a # into the text here...we are in CMODE */
-
- {
- register int ch; /* last character before input */
- register int i;
-
- /* if we are at the beginning of the line, no go */
- if (curwp->w_doto == 0)
- return(linsert(1,'#'));
-
- /* scan to see if all space before this is white space */
- for (i = curwp->w_doto - 1; i >= 0; --i) {
- ch = lgetc(curwp->w_dotp, i);
- if (ch != ' ' && ch != '\t')
- return(linsert(1, '#'));
- }
-
- /* delete back first */
- while (getccol(FALSE) >= 1)
- backdel(FALSE, 1);
-
- /* and insert the required pound */
- return(linsert(1, '#'));
- }
-
- /*
- * Delete blank lines around dot. What this command does depends if dot is
- * sitting on a blank line. If dot is sitting on a blank line, this command
- * deletes all the blank lines above and below the current line. If it is
- * sitting on a non blank line then it deletes all of the blank lines after
- * the line. Normally this command is bound to "C-X C-O". Any argument is
- * ignored.
- */
- PASCAL NEAR deblank(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *lp1;
- register LINE *lp2;
- long nld;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- lp1 = curwp->w_dotp;
- while (llength(lp1)==0 && (lp2=lback(lp1))!=curbp->b_linep)
- lp1 = lp2;
- lp2 = lp1;
- nld = 0;
- while ((lp2=lforw(lp2))!=curbp->b_linep && llength(lp2)==0)
- ++nld;
- if (nld == 0)
- return(TRUE);
- curwp->w_dotp = lforw(lp1);
- curwp->w_doto = 0;
- return(ldelete(nld, FALSE));
- }
-
- /*
- * Insert a newline, then enough tabs and spaces to duplicate the indentation
- * of the previous line. Tabs are every tabsize characters. Quite simple.
- * Figure out the indentation of the current line. Insert a newline by calling
- * the standard routine. Insert the indentation by inserting the right number
- * of tabs and spaces. Return TRUE if all ok. Return FALSE if one of the
- * subcomands failed. Normally bound to "C-J".
- */
- PASCAL NEAR indent(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int nicol;
- register int c;
- register int i;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return(FALSE);
- while (n--) {
- nicol = 0;
- for (i=0; i<llength(curwp->w_dotp); ++i) {
- c = lgetc(curwp->w_dotp, i);
- if (c!=' ' && c!='\t')
- break;
- if (c == '\t')
- nicol += -(nicol % tabsize) + (tabsize - 1);
- ++nicol;
- }
- if (lnewline() == FALSE
- || ((i=nicol/tabsize)!=0 && linsert(i, '\t')==FALSE)
- || ((i=nicol%tabsize)!=0 && linsert(i, ' ')==FALSE))
- return(FALSE);
- }
- return(TRUE);
- }
-
- /*
- * Delete forward. This is real easy, because the basic delete routine does
- * all of the work. Watches for negative arguments, and does the right thing.
- * If any argument is present, it kills rather than deletes, to prevent loss
- * of text if typed with a big argument. Normally bound to "C-D".
- */
- PASCAL NEAR forwdel(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return(backdel(f, -n));
- if (f != FALSE) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- next_kill();
- thisflag |= CFKILL;
- }
- return(ldelete((long)n, f));
- }
-
- /*
- * Delete backwards. This is quite easy too, because it's all done with other
- * functions. Just move the cursor back, and delete forwards. Like delete
- * forward, this actually does a kill if presented with an argument. Bound to
- * both "RUBOUT" and "C-H".
- */
- PASCAL NEAR backdel(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register int s;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if (n < 0)
- return(forwdel(f, -n));
- if (f != FALSE) { /* Really a kill. */
- if ((lastflag&CFKILL) == 0)
- next_kill();
- thisflag |= CFKILL;
- }
- if ((s=backchar(f, n)) == TRUE)
- s = ldelete((long)n, f);
- return(s);
- }
-
- /*
- * Kill text. If called without an argument, it kills from dot to the end of
- * the line, unless it is at the end of the line, when it kills the newline.
- * If called with an argument of 0, it kills from the start of the line to dot.
- * If called with a positive argument, it kills from dot forward over that
- * number of newlines. If called with a negative argument it kills backwards
- * that number of newlines. Normally bound to "C-K".
- */
- PASCAL NEAR killtext(f, n)
-
- int f,n; /* prefix flag and argument */
-
- {
- register LINE *nextp;
- long chunk;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((lastflag&CFKILL) == 0) /* Clear kill buffer if */
- next_kill(); /* last wasn't a kill. */
- thisflag |= CFKILL;
-
- if (f == FALSE) {
- chunk = llength(curwp->w_dotp)-curwp->w_doto;
- if (chunk == 0)
- chunk = 1;
- } else if (n == 0) {
- chunk = -curwp->w_doto;
- } else if (n > 0) {
- chunk = llength(curwp->w_dotp)-curwp->w_doto+1;
- nextp = lforw(curwp->w_dotp);
- while (--n) {
- if (nextp == curbp->b_linep)
- return(FALSE);
- chunk += llength(nextp)+1;
- nextp = lforw(nextp);
- }
- } else if (n < 0) {
- chunk = -curwp->w_doto;
- nextp = lback(curwp->w_dotp);
- while (n++) {
- if (nextp == curbp->b_linep)
- return(FALSE);
- chunk -= llength(nextp)+1;
- nextp = lback(nextp);
- }
- }
- return(ldelete(chunk, TRUE));
- }
-
- PASCAL NEAR setmod(f, n) /* prompt and set an editor mode */
-
- int f, n; /* default and argument */
-
- {
- return(adjustmode(TRUE, FALSE));
- }
-
- PASCAL NEAR delmode(f, n) /* prompt and delete an editor mode */
-
- int f, n; /* default and argument */
-
- {
- return(adjustmode(FALSE, FALSE));
- }
-
- PASCAL NEAR setgmode(f, n) /* prompt and set a global editor mode */
-
- int f, n; /* default and argument */
-
- {
- return(adjustmode(TRUE, TRUE));
- }
-
- PASCAL NEAR delgmode(f, n) /* prompt and delete a global editor mode */
-
- int f, n; /* default and argument */
-
- {
- return(adjustmode(FALSE, TRUE));
- }
-
- PASCAL NEAR adjustmode(kind, global) /* change the editor mode status */
-
- int kind; /* true = set, false = delete */
- int global; /* true = global flag, false = current buffer flag */
- {
- register char *scan; /* scanning pointer to convert prompt */
- register int i; /* loop index */
- register int status; /* error return on input */
- #if COLOR
- register int uflag; /* was modename uppercase? */
- #endif
- char prompt[50]; /* string to prompt user with */
- char cbuf[NPAT]; /* buffer to recieve mode name into */
-
- /* build the proper prompt string */
- if (global)
- strcpy(prompt,TEXT62);
- /* "Global mode to " */
- else
- strcpy(prompt,TEXT63);
- /* "Mode to " */
-
- if (kind == TRUE)
- strcat(prompt, TEXT64);
- /* "add: " */
- else
- strcat(prompt, TEXT65);
- /* "delete: " */
-
- /* prompt the user and get an answer */
-
- status = mlreply(prompt, cbuf, NPAT - 1);
- if (status != TRUE)
- return(status);
-
- /* make it uppercase */
-
- scan = cbuf;
- #if COLOR
- uflag = (*scan >= 'A' && *scan <= 'Z');
- #endif
- while (*scan)
- uppercase(scan++);
-
- /* test it first against the colors we know */
- if ((i = lookup_color(cbuf)) != -1) {
-
- #if COLOR
- /* finding the match, we set the color */
- if (global) {
- if (uflag)
- gfcolor = i;
- else
- gbcolor = i;
- #if WINDOW_TEXT & 0
- refresh_screen(first_screen);
- #endif
- } else
- if (uflag)
- curwp->w_fcolor = i;
- else
- curwp->w_bcolor = i;
-
- curwp->w_flag |= WFCOLR;
- #endif
- mlerase();
- return(TRUE);
- }
-
- /* test it against the modes we know */
-
- for (i=0; i < NUMMODES; i++) {
- if (strcmp(cbuf, modename[i]) == 0) {
- /* finding a match, we process it */
- if (kind == TRUE)
- if (global) {
- gmode |= (1 << i);
- if ((1 << i) == MDOVER)
- gmode &= ~MDREPL;
- else if ((1 << i) == MDREPL)
- gmode &= ~MDOVER;
- } else {
- curbp->b_mode |= (1 << i);
- if ((1 << i) == MDOVER)
- curbp->b_mode &= ~MDREPL;
- else if ((1 << i) == MDREPL)
- curbp->b_mode &= ~MDOVER;
- }
- else
- if (global)
- gmode &= ~(1 << i);
- else
- curbp->b_mode &= ~(1 << i);
- /* display new mode line */
- if (global == 0)
- upmode();
- mlerase(); /* erase the junk */
- return(TRUE);
- }
- }
-
- mlwrite(TEXT66);
- /* "No such mode!" */
- return(FALSE);
- }
-
- /* This function simply clears the message line,
- mainly for macro usage */
-
- PASCAL NEAR clrmes(f, n)
-
- int f, n; /* arguments ignored */
-
- {
- mlforce("");
- return(TRUE);
- }
-
- /* This function writes a string on the message line
- mainly for macro usage */
-
- PASCAL NEAR writemsg(f, n)
-
- int f, n; /* arguments ignored */
-
- {
- register int status;
- char buf[NPAT]; /* buffer to recieve message into */
-
- if ((status = mlreply(TEXT67, buf, NPAT - 1)) != TRUE)
- /* "Message to write: " */
- return(status);
-
- /* expand all '%' to "%%" so mlwrite won't expect arguments */
- makelit(buf);
-
- /* write the message out */
- mlforce(buf);
- return(TRUE);
- }
-
- /* the cursor is moved to a matching fence */
-
- PASCAL NEAR getfence(f, n)
-
- int f, n; /* not used */
-
- {
- register LINE *oldlp; /* original line pointer */
- register int oldoff; /* and offset */
- register int sdir; /* direction of search (1/-1) */
- register int count; /* current fence level count */
- register char ch; /* fence type to match against */
- register char ofence; /* open fence */
- register char c; /* current character in scan */
-
- /* save the original cursor position */
- oldlp = curwp->w_dotp;
- oldoff = curwp->w_doto;
-
- /* get the current character */
- if (oldoff == llength(oldlp))
- ch = '\r';
- else
- ch = lgetc(oldlp, oldoff);
-
- /* setup proper matching fence */
- switch (ch) {
- case '(': ofence = ')'; sdir = FORWARD; break;
- case '{': ofence = '}'; sdir = FORWARD; break;
- case '[': ofence = ']'; sdir = FORWARD; break;
- case ')': ofence = '('; sdir = REVERSE; break;
- case '}': ofence = '{'; sdir = REVERSE; break;
- case ']': ofence = '['; sdir = REVERSE; break;
- default: TTbeep(); return(FALSE);
- }
-
- /* set up for scan */
- count = 1;
-
- /* scan until we find it, or reach the end of file */
- while (count > 0) {
- if (sdir == FORWARD)
- forwchar(FALSE, 1);
- else
- backchar(FALSE, 1);
-
- if (curwp->w_doto == llength(curwp->w_dotp))
- c = '\r';
- else
- c = lgetc(curwp->w_dotp, curwp->w_doto);
- if (c == ch)
- ++count;
- if (c == ofence)
- --count;
- if (boundry(curwp->w_dotp, curwp->w_doto, sdir))
- break;
- }
-
- /* if count is zero, we have a match, move the sucker */
- if (count == 0) {
- curwp->w_flag |= WFMOVE;
- return(TRUE);
- }
-
- /* restore the current position */
- curwp->w_dotp = oldlp;
- curwp->w_doto = oldoff;
- TTbeep();
- return(FALSE);
- }
-
- /* Close fences are matched against their partners, and if
- on screen the cursor briefly lights there */
-
- #if PROTO
- PASCAL NEAR fmatch(char ch)
- #else
- PASCAL NEAR fmatch(ch)
-
- char ch; /* fence type to match against */
- #endif
-
- {
- register LINE *oldlp; /* original line pointer */
- register int oldoff; /* and offset */
- register LINE *toplp; /* top line in current window */
- register int count; /* current fence level count */
- register char opench; /* open fence */
- register char c; /* current character in scan */
- register int i;
-
- /* first get the display update out there */
- update(FALSE);
-
- /* save the original cursor position */
- oldlp = curwp->w_dotp;
- oldoff = curwp->w_doto;
-
- /* setup proper open fence for passed close fence */
- if (ch == ')')
- opench = '(';
- else if (ch == '}')
- opench = '{';
- else
- opench = '[';
-
- /* find the top line and set up for scan */
- toplp = curwp->w_linep->l_bp;
- count = 1;
- backchar(FALSE, 1);
-
- /* scan back until we find it, or reach past the top of the window */
- while (count > 0 && curwp->w_dotp != toplp) {
- backchar(FALSE, 1);
- if (curwp->w_doto == llength(curwp->w_dotp))
- c = '\r';
- else
- c = lgetc(curwp->w_dotp, curwp->w_doto);
- if (c == ch)
- ++count;
- if (c == opench)
- --count;
- if (curwp->w_dotp == curwp->w_bufp->b_linep->l_fp &&
- curwp->w_doto == 0)
- break;
- }
-
- /* if count is zero, we have a match, display the sucker */
- /* there is a real machine dependant timing problem here we have
- yet to solve......... */
- if (count == 0) {
- #if WINDOW_MSWIN
- update(FALSE);
- term.t_sleep (term.t_pause);
- #else
- for (i = 0; i < term.t_pause; i++)
- update(FALSE);
- #endif
- }
-
- /* restore the current position */
- curwp->w_dotp = oldlp;
- curwp->w_doto = oldoff;
- return(TRUE);
- }
-
- PASCAL NEAR istring(f, n) /* ask for and insert a string into the current
- buffer at the current point */
-
- int f, n; /* ignored arguments */
-
- {
- register int status; /* status return code */
- char tstring[NPAT+1]; /* string to add */
-
- /* ask for string to insert */
- status = mltreply(TEXT68, tstring, NPAT, sterm);
- /* "String to insert<META>: " */
- if (status != TRUE)
- return(status);
-
- if (f == FALSE)
- n = 1;
-
- if (n < 0)
- n = - n;
-
- /* insert it */
- while (n-- && (status = linstr(tstring)))
- ;
- return(status);
- }
-
- PASCAL NEAR ovstring(f, n) /* ask for and overwite a string into the current
- buffer at the current point */
-
- int f, n; /* ignored arguments */
-
- {
- register int status; /* status return code */
- char tstring[NPAT+1]; /* string to add */
-
- /* ask for string to insert */
- status = mltreply(TEXT69, tstring, NPAT, sterm);
- /* "String to overwrite<META>: " */
- if (status != TRUE)
- return(status);
-
- if (f == FALSE)
- n = 1;
-
- if (n < 0)
- n = - n;
-
- /* insert it */
- while (n-- && (status = lover(tstring)))
- ;
- return(status);
- }
-
- int PASCAL NEAR lookup_color(sp)
-
- char *sp; /* name to look up */
-
- {
- register int i; /* index into color list */
-
- /* test it against the colors we know */
- for (i = 0; i < NCOLORS; i++) {
- if (strcmp(sp, cname[i]) == 0)
- return(i);
- }
- return(-1);
- }
-
-