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- /*
- * The routines in this file
- * deal with the region, that magic space
- * between "." and mark. Some functions are
- * commands. Some functions are just for
- * internal use.
- */
- #include <stdio.h>
- #include "estruct.h"
- #include "edef.h"
-
- #if MEGAMAX & ST520
- overlay "region"
- #endif
-
- /*
- * Kill the region. Ask "getregion"
- * to figure out the bounds of the region.
- * Move "." to the start, and kill the characters.
- * Bound to "C-W".
- */
- killregion(f, n)
- {
- register int s;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return (s);
- if ((lastflag&CFKILL) == 0) /* This is a kill type */
- kdelete(); /* command, so do magic */
- thisflag |= CFKILL; /* kill buffer stuff. */
- curwp->w_dotp = region.r_linep;
- curwp->w_doto = region.r_offset;
- return (ldelete(region.r_size, TRUE));
- }
-
- /*
- * Copy all of the characters in the
- * region to the kill buffer. Don't move dot
- * at all. This is a bit like a kill region followed
- * by a yank. Bound to "M-W".
- */
- copyregion(f, n)
- {
- register LINE *linep;
- register int loffs;
- register int s;
- REGION region;
-
- if ((s=getregion(®ion)) != TRUE)
- return (s);
- if ((lastflag&CFKILL) == 0) /* Kill type command. */
- kdelete();
- thisflag |= CFKILL;
- linep = region.r_linep; /* Current line. */
- loffs = region.r_offset; /* Current offset. */
- while (region.r_size--) {
- if (loffs == llength(linep)) { /* End of line. */
- if ((s=kinsert('\n')) != TRUE)
- return (s);
- linep = lforw(linep);
- loffs = 0;
- } else { /* Middle of line. */
- if ((s=kinsert(lgetc(linep, loffs))) != TRUE)
- return (s);
- ++loffs;
- }
- }
- mlwrite("[region copied]");
- return (TRUE);
- }
-
- /*
- * Lower case region. Zap all of the upper
- * case characters in the region to lower case. Use
- * the region code to set the limits. Scan the buffer,
- * doing the changes. Call "lchange" to ensure that
- * redisplay is done in all buffers. Bound to
- * "C-X C-L".
- */
- lowerregion(f, n)
- {
- register LINE *linep;
- register int loffs;
- register int c;
- register int s;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return (s);
- lchange(WFHARD);
- linep = region.r_linep;
- loffs = region.r_offset;
- while (region.r_size--) {
- if (loffs == llength(linep)) {
- linep = lforw(linep);
- loffs = 0;
- } else {
- c = lgetc(linep, loffs);
- if (c>='A' && c<='Z')
- lputc(linep, loffs, c+'a'-'A');
- ++loffs;
- }
- }
- return (TRUE);
- }
-
- /*
- * Upper case region. Zap all of the lower
- * case characters in the region to upper case. Use
- * the region code to set the limits. Scan the buffer,
- * doing the changes. Call "lchange" to ensure that
- * redisplay is done in all buffers. Bound to
- * "C-X C-L".
- */
- upperregion(f, n)
- {
- register LINE *linep;
- register int loffs;
- register int c;
- register int s;
- REGION region;
-
- if (curbp->b_mode&MDVIEW) /* don't allow this command if */
- return(rdonly()); /* we are in read only mode */
- if ((s=getregion(®ion)) != TRUE)
- return (s);
- lchange(WFHARD);
- linep = region.r_linep;
- loffs = region.r_offset;
- while (region.r_size--) {
- if (loffs == llength(linep)) {
- linep = lforw(linep);
- loffs = 0;
- } else {
- c = lgetc(linep, loffs);
- if (c>='a' && c<='z')
- lputc(linep, loffs, c-'a'+'A');
- ++loffs;
- }
- }
- return (TRUE);
- }
-
- /*
- * This routine figures out the
- * bounds of the region in the current window, and
- * fills in the fields of the "REGION" structure pointed
- * to by "rp". Because the dot and mark are usually very
- * close together, we scan outward from dot looking for
- * mark. This should save time. Return a standard code.
- * Callers of this routine should be prepared to get
- * an "ABORT" status; we might make this have the
- * conform thing later.
- */
- getregion(rp)
- register REGION *rp;
- {
- register LINE *flp;
- register LINE *blp;
- long fsize;
- long bsize;
-
- if (curwp->w_markp == NULL) {
- mlwrite("No mark set in this window");
- return (FALSE);
- }
- if (curwp->w_dotp == curwp->w_markp) {
- rp->r_linep = curwp->w_dotp;
- if (curwp->w_doto < curwp->w_marko) {
- rp->r_offset = curwp->w_doto;
- rp->r_size = (long)(curwp->w_marko-curwp->w_doto);
- } else {
- rp->r_offset = curwp->w_marko;
- rp->r_size = (long)(curwp->w_doto-curwp->w_marko);
- }
- return (TRUE);
- }
- blp = curwp->w_dotp;
- bsize = (long)curwp->w_doto;
- flp = curwp->w_dotp;
- fsize = (long)(llength(flp)-curwp->w_doto+1);
- while (flp!=curbp->b_linep || lback(blp)!=curbp->b_linep) {
- if (flp != curbp->b_linep) {
- flp = lforw(flp);
- if (flp == curwp->w_markp) {
- rp->r_linep = curwp->w_dotp;
- rp->r_offset = curwp->w_doto;
- rp->r_size = fsize+curwp->w_marko;
- return (TRUE);
- }
- fsize += llength(flp)+1;
- }
- if (lback(blp) != curbp->b_linep) {
- blp = lback(blp);
- bsize += llength(blp)+1;
- if (blp == curwp->w_markp) {
- rp->r_linep = blp;
- rp->r_offset = curwp->w_marko;
- rp->r_size = bsize - curwp->w_marko;
- return (TRUE);
- }
- }
- }
- mlwrite("Bug: lost mark");
- return (FALSE);
- }
-
-