X-Git-Url: https://pd.if.org/git/?p=pd_readline;a=blobdiff_plain;f=mg%2Fline.c;fp=mg%2Fline.c;h=0000000000000000000000000000000000000000;hp=bafd64f5569618a2441b3a794876dda9497e645f;hb=4bb27266f935c9aafad6870ffc8847fc65c8120f;hpb=3f771e17236364ded86e96ee64f99344337991f8

diff --git a/mg/line.c b/mg/line.c
deleted file mode 100644
index bafd64f..0000000
--- a/mg/line.c
+++ /dev/null
@@ -1,635 +0,0 @@
-/*	$OpenBSD: line.c,v 1.50 2011/01/18 16:28:00 kjell Exp $	*/
-
-/* This file is in the public domain. */
-
-/*
- *		Text line handling.
- *
- * The functions in this file are a general set of line management
- * utilities. They are the only routines that touch the text. They
- * also touch the buffer and window structures to make sure that the
- * necessary updating gets done.  There are routines in this file that
- * handle the kill buffer too.  It isn't here for any good reason.
- *
- * Note that this code only updates the dot and mark values in the window
- * list.  Since all the code acts on the current window, the buffer that
- * we are editing must be displayed, which means that "b_nwnd" is non-zero,
- * which means that the dot and mark values in the buffer headers are
- * nonsense.
- */
-
-#include "def.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-/*
- * Allocate a new line of size `used'.  lrealloc() can be called if the line
- * ever needs to grow beyond that.
- */
-struct line *
-lalloc(int used)
-{
-	struct line *lp;
-
-	if ((lp = malloc(sizeof(*lp))) == NULL)
-		return (NULL);
-	lp->l_text = NULL;
-	lp->l_size = 0;
-	lp->l_used = used;	/* XXX */
-	if (lrealloc(lp, used) == FALSE) {
-		free(lp);
-		return (NULL);
-	}
-	return (lp);
-}
-
-int
-lrealloc(struct line *lp, int newsize)
-{
-	char *tmp;
-
-	if (lp->l_size < newsize) {
-		if ((tmp = realloc(lp->l_text, newsize)) == NULL)
-			return (FALSE);
-		lp->l_text = tmp;
-		lp->l_size = newsize;
-	}
-	return (TRUE);
-}
-
-/*
- * Delete line "lp".  Fix all of the links that might point to it (they are
- * moved to offset 0 of the next line.  Unlink the line from whatever buffer
- * it might be in, and release the memory.  The buffers are updated too; the
- * magic conditions described in the above comments don't hold here.
- */
-void
-lfree(struct line *lp)
-{
-	struct buffer	*bp;
-	struct mgwin	*wp;
-
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_linep == lp)
-			wp->w_linep = lp->l_fp;
-		if (wp->w_dotp == lp) {
-			wp->w_dotp = lp->l_fp;
-			wp->w_doto = 0;
-		}
-		if (wp->w_markp == lp) {
-			wp->w_markp = lp->l_fp;
-			wp->w_marko = 0;
-		}
-	}
-	for (bp = bheadp; bp != NULL; bp = bp->b_bufp) {
-		if (bp->b_nwnd == 0) {
-			if (bp->b_dotp == lp) {
-				bp->b_dotp = lp->l_fp;
-				bp->b_doto = 0;
-			}
-			if (bp->b_markp == lp) {
-				bp->b_markp = lp->l_fp;
-				bp->b_marko = 0;
-			}
-		}
-	}
-	lp->l_bp->l_fp = lp->l_fp;
-	lp->l_fp->l_bp = lp->l_bp;
-	if (lp->l_text != NULL)
-		free(lp->l_text);
-	free(lp);
-}
-
-/*
- * This routine is called when a character changes in place in the current
- * buffer. It updates all of the required flags in the buffer and window
- * system. The flag used is passed as an argument; if the buffer is being
- * displayed in more than 1 window we change EDIT to HARD. Set MODE if the
- * mode line needs to be updated (the "*" has to be set).
- */
-void
-lchange(int flag)
-{
-	struct mgwin	*wp;
-
-	/* update mode lines if this is the first change. */
-	if ((curbp->b_flag & BFCHG) == 0) {
-		flag |= WFMODE;
-		curbp->b_flag |= BFCHG;
-	}
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_bufp == curbp) {
-			wp->w_rflag |= flag;
-			if (wp != curwp)
-				wp->w_rflag |= WFFULL;
-		}
-	}
-}
-
-/*
- * Insert "n" bytes from "s" at the current location of dot.
- * In the easy case all that happens is the text is stored in the line.
- * In the hard case, the line has to be reallocated.  When the window list
- * is updated, take special care; I screwed it up once.  You always update
- * dot in the current window.  You update mark and a dot in another window
- * if it is greater than the place where you did the insert. Return TRUE
- * if all is well, and FALSE on errors.
- */
-int
-linsert_str(const char *s, int n)
-{
-	struct line	*lp1;
-	struct mgwin	*wp;
-	RSIZE	 i;
-	int	 doto, k;
-
-	if ((k = checkdirty(curbp)) != TRUE)
-		return (k);
-
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		return (FALSE);
-	}
-
-	if (!n)
-		return (TRUE);
-
-	lchange(WFFULL);
-
-	/* current line */
-	lp1 = curwp->w_dotp;
-
-	/* special case for the end */
-	if (lp1 == curbp->b_headp) {
-		struct line *lp2, *lp3;
-
-		/* now should only happen in empty buffer */
-		if (curwp->w_doto != 0)
-			panic("bug: linsert_str");
-		/* allocate a new line */
-		if ((lp2 = lalloc(n)) == NULL)
-			return (FALSE);
-		/* previous line */
-		lp3 = lp1->l_bp;
-		/* link in */
-		lp3->l_fp = lp2;
-		lp2->l_fp = lp1;
-		lp1->l_bp = lp2;
-		lp2->l_bp = lp3;
-		for (i = 0; i < n; ++i)
-			lp2->l_text[i] = s[i];
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-			if (wp->w_linep == lp1)
-				wp->w_linep = lp2;
-			if (wp->w_dotp == lp1)
-				wp->w_dotp = lp2;
-			if (wp->w_markp == lp1)
-				wp->w_markp = lp2;
-		}
-		undo_add_insert(lp2, 0, n);
-		curwp->w_doto = n;
-		return (TRUE);
-	}
-	/* save for later */
-	doto = curwp->w_doto;
-
-	if ((lp1->l_used + n) > lp1->l_size) {
-		if (lrealloc(lp1, lp1->l_used + n) == FALSE)
-			return (FALSE);
-	}
-	lp1->l_used += n;
-	if (lp1->l_used != n)
-		memmove(&lp1->l_text[doto + n], &lp1->l_text[doto],
-		    lp1->l_used - n - doto);
-
-	/* Add the characters */
-	for (i = 0; i < n; ++i)
-		lp1->l_text[doto + i] = s[i];
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_dotp == lp1) {
-			if (wp == curwp || wp->w_doto > doto)
-				wp->w_doto += n;
-		}
-		if (wp->w_markp == lp1) {
-			if (wp->w_marko > doto)
-				wp->w_marko += n;
-		}
-	}
-	undo_add_insert(curwp->w_dotp, doto, n);
-	return (TRUE);
-}
-
-/*
- * Insert "n" copies of the character "c" at the current location of dot.
- * In the easy case all that happens is the text is stored in the line.
- * In the hard case, the line has to be reallocated.  When the window list
- * is updated, take special care; I screwed it up once.  You always update
- * dot in the current window.  You update mark and a dot in another window
- * if it is greater than the place where you did the insert. Return TRUE
- * if all is well, and FALSE on errors.
- */
-int
-linsert(int n, int c)
-{
-	struct line	*lp1;
-	struct mgwin	*wp;
-	RSIZE	 i;
-	int	 doto;
-	int s;
-
-	if (!n)
-		return (TRUE);
-
-	if ((s = checkdirty(curbp)) != TRUE)
-		return (s);
-	
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		return (FALSE);
-	}
-
-	lchange(WFEDIT);
-
-	/* current line */
-	lp1 = curwp->w_dotp;
-
-	/* special case for the end */
-	if (lp1 == curbp->b_headp) {
-		struct line *lp2, *lp3;
-
-		/* now should only happen in empty buffer */
-		if (curwp->w_doto != 0) {
-			ewprintf("bug: linsert");
-			return (FALSE);
-		}
-		/* allocate a new line */
-		if ((lp2 = lalloc(n)) == NULL)
-			return (FALSE);
-		/* previous line */
-		lp3 = lp1->l_bp;
-		/* link in */
-		lp3->l_fp = lp2;
-		lp2->l_fp = lp1;
-		lp1->l_bp = lp2;
-		lp2->l_bp = lp3;
-		for (i = 0; i < n; ++i)
-			lp2->l_text[i] = c;
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-			if (wp->w_linep == lp1)
-				wp->w_linep = lp2;
-			if (wp->w_dotp == lp1)
-				wp->w_dotp = lp2;
-			if (wp->w_markp == lp1)
-				wp->w_markp = lp2;
-		}
-		undo_add_insert(lp2, 0, n);
-		curwp->w_doto = n;
-		return (TRUE);
-	}
-	/* save for later */
-	doto = curwp->w_doto;
-
-	if ((lp1->l_used + n) > lp1->l_size) {
-		if (lrealloc(lp1, lp1->l_used + n) == FALSE)
-			return (FALSE);
-	}
-	lp1->l_used += n;
-	if (lp1->l_used != n)
-		memmove(&lp1->l_text[doto + n], &lp1->l_text[doto],
-		    lp1->l_used - n - doto);
-
-	/* Add the characters */
-	for (i = 0; i < n; ++i)
-		lp1->l_text[doto + i] = c;
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_dotp == lp1) {
-			if (wp == curwp || wp->w_doto > doto)
-				wp->w_doto += n;
-		}
-		if (wp->w_markp == lp1) {
-			if (wp->w_marko > doto)
-				wp->w_marko += n;
-		}
-	}
-	undo_add_insert(curwp->w_dotp, doto, n);
-	return (TRUE);
-}
-
-/*
- * Do the work of inserting a newline at the given line/offset.
- * If mark is on the current line, we may have to move the markline
- * to keep line numbers in sync.
- * lnewline_at assumes the current buffer is writable. Checking for
- * this fact should be done by the caller.
- */
-int
-lnewline_at(struct line *lp1, int doto)
-{
-	struct line	*lp2;
-	int	 nlen;
-	struct mgwin	*wp;
-
-	lchange(WFFULL);
-
-	curwp->w_bufp->b_lines++;
-	/* Check if mark is past dot (even on current line) */
-	if (curwp->w_markline > curwp->w_dotline  ||
-	   (curwp->w_dotline == curwp->w_markline &&
-	    curwp->w_marko >= doto))
-		curwp->w_markline++;
-	curwp->w_dotline++;
-
-	/* If start of line, allocate a new line instead of copying */
-	if (doto == 0) {
-		/* new first part */
-		if ((lp2 = lalloc(0)) == NULL)
-			return (FALSE);
-		lp2->l_bp = lp1->l_bp;
-		lp1->l_bp->l_fp = lp2;
-		lp2->l_fp = lp1;
-		lp1->l_bp = lp2;
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp)
-			if (wp->w_linep == lp1)
-				wp->w_linep = lp2;
-		undo_add_boundary(FFRAND, 1);
-		undo_add_insert(lp2, 0, 1);
-		undo_add_boundary(FFRAND, 1);
-		return (TRUE);
-	}
-
-	/* length of new part */
-	nlen = llength(lp1) - doto;
-
-	/* new second half line */
-	if ((lp2 = lalloc(nlen)) == NULL)
-		return (FALSE);
-	if (nlen != 0)
-		bcopy(&lp1->l_text[doto], &lp2->l_text[0], nlen);
-	lp1->l_used = doto;
-	lp2->l_bp = lp1;
-	lp2->l_fp = lp1->l_fp;
-	lp1->l_fp = lp2;
-	lp2->l_fp->l_bp = lp2;
-	/* Windows */
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_dotp == lp1 && wp->w_doto >= doto) {
-			wp->w_dotp = lp2;
-			wp->w_doto -= doto;
-		}
-		if (wp->w_markp == lp1 && wp->w_marko >= doto) {
-			wp->w_markp = lp2;
-			wp->w_marko -= doto;
-		}
-	}
-	undo_add_boundary(FFRAND, 1);
-	undo_add_insert(lp1, llength(lp1), 1);
-	undo_add_boundary(FFRAND, 1);
-	return (TRUE);
-}
-
-/*
- * Insert a newline into the buffer at the current location of dot in the
- * current window.
- */
-int
-lnewline(void)
-{
-	int s;
-
-	if ((s = checkdirty(curbp)) != TRUE)
-		return (s);
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		return (FALSE);
-	}
-	return (lnewline_at(curwp->w_dotp, curwp->w_doto));
-}
-
-/*
- * This function deletes "n" bytes, starting at dot. (actually, n+1, as the
- * newline is included) It understands how to deal with end of lines, etc.
- * It returns TRUE if all of the characters were deleted, and FALSE if
- * they were not (because dot ran into the end of the buffer).
- * The "kflag" indicates either no insertion, or direction  of insertion
- * into the kill buffer.
- */
-int
-ldelete(RSIZE n, int kflag)
-{
-	struct line	*dotp;
-	RSIZE		 chunk;
-	struct mgwin	*wp;
-	int		 doto;
-	char		*cp1, *cp2;
-	size_t		 len;
-	char		*sv = NULL;
-	int		 end;
-	int		 s;
-	int		 rval = FALSE;
-
-	if ((s = checkdirty(curbp)) != TRUE)
-		return (s);
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		goto out;
-	}
-	len = n;
-	if ((sv = calloc(1, len + 1)) == NULL)
-		goto out;
-	end = 0;
-
-	undo_add_delete(curwp->w_dotp, curwp->w_doto, n, (kflag & KREG));
-
-	while (n != 0) {
-		dotp = curwp->w_dotp;
-		doto = curwp->w_doto;
-		/* Hit the end of the buffer */
-		if (dotp == curbp->b_headp)
-			goto out;
-		/* Size of the chunk */
-		chunk = dotp->l_used - doto;
-
-		if (chunk > n)
-			chunk = n;
-		/* End of line, merge */
-		if (chunk == 0) {
-			if (dotp == blastlp(curbp))
-				goto out;
-			lchange(WFFULL);
-			if (ldelnewline() == FALSE)
-				goto out;
-			end = strlcat(sv, "\n", len + 1);
-			--n;
-			continue;
-		}
-		lchange(WFEDIT);
-		/* Scrunch text */
-		cp1 = &dotp->l_text[doto];
-		memcpy(&sv[end], cp1, chunk);
-		end += chunk;
-		sv[end] = '\0';
-		for (cp2 = cp1 + chunk; cp2 < &dotp->l_text[dotp->l_used];
-		    cp2++)
-			*cp1++ = *cp2;
-		dotp->l_used -= (int)chunk;
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-			if (wp->w_dotp == dotp && wp->w_doto >= doto) {
-				/* NOSTRICT */
-				wp->w_doto -= chunk;
-				if (wp->w_doto < doto)
-					wp->w_doto = doto;
-			}
-			if (wp->w_markp == dotp && wp->w_marko >= doto) {
-				/* NOSTRICT */
-				wp->w_marko -= chunk;
-				if (wp->w_marko < doto)
-					wp->w_marko = doto;
-			}
-		}
-		n -= chunk;
-	}
-	if (kchunk(sv, (RSIZE)len, kflag) != TRUE)
-		goto out;
-	rval = TRUE;
-out:
-	free(sv);
-	return (rval);
-}
-
-/*
- * Delete a newline and join the current line with the next line. If the next
- * line is the magic header line always return TRUE; merging the last line
- * with the header line can be thought of as always being a successful
- * operation.  Even if nothing is done, this makes the kill buffer work
- * "right". If the mark is past the dot (actually, markline > dotline),
- * decrease the markline accordingly to keep line numbers in sync.
- * Easy cases can be done by shuffling data around.  Hard cases
- * require that lines be moved about in memory.  Return FALSE on error and
- * TRUE if all looks ok. We do not update w_dotline here, as deletes are done
- * after moves.
- */
-int
-ldelnewline(void)
-{
-	struct line	*lp1, *lp2, *lp3;
-	struct mgwin	*wp;
-	int s;
-
-	if ((s = checkdirty(curbp)) != TRUE)
-		return (s);
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		return (FALSE);
-	}
-
-	lp1 = curwp->w_dotp;
-	lp2 = lp1->l_fp;
-	/* at the end of the buffer */
-	if (lp2 == curbp->b_headp)
-		return (TRUE);
-	/* Keep line counts in sync */
-	curwp->w_bufp->b_lines--;
-	if (curwp->w_markline > curwp->w_dotline)
-		curwp->w_markline--;
-	if (lp2->l_used <= lp1->l_size - lp1->l_used) {
-		bcopy(&lp2->l_text[0], &lp1->l_text[lp1->l_used], lp2->l_used);
-		for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-			if (wp->w_linep == lp2)
-				wp->w_linep = lp1;
-			if (wp->w_dotp == lp2) {
-				wp->w_dotp = lp1;
-				wp->w_doto += lp1->l_used;
-			}
-			if (wp->w_markp == lp2) {
-				wp->w_markp = lp1;
-				wp->w_marko += lp1->l_used;
-			}
-		}
-		lp1->l_used += lp2->l_used;
-		lp1->l_fp = lp2->l_fp;
-		lp2->l_fp->l_bp = lp1;
-		free(lp2);
-		return (TRUE);
-	}
-	if ((lp3 = lalloc(lp1->l_used + lp2->l_used)) == NULL)
-		return (FALSE);
-	bcopy(&lp1->l_text[0], &lp3->l_text[0], lp1->l_used);
-	bcopy(&lp2->l_text[0], &lp3->l_text[lp1->l_used], lp2->l_used);
-	lp1->l_bp->l_fp = lp3;
-	lp3->l_fp = lp2->l_fp;
-	lp2->l_fp->l_bp = lp3;
-	lp3->l_bp = lp1->l_bp;
-	for (wp = wheadp; wp != NULL; wp = wp->w_wndp) {
-		if (wp->w_linep == lp1 || wp->w_linep == lp2)
-			wp->w_linep = lp3;
-		if (wp->w_dotp == lp1)
-			wp->w_dotp = lp3;
-		else if (wp->w_dotp == lp2) {
-			wp->w_dotp = lp3;
-			wp->w_doto += lp1->l_used;
-		}
-		if (wp->w_markp == lp1)
-			wp->w_markp = lp3;
-		else if (wp->w_markp == lp2) {
-			wp->w_markp = lp3;
-			wp->w_marko += lp1->l_used;
-		}
-	}
-	free(lp1);
-	free(lp2);
-	return (TRUE);
-}
-
-/*
- * Replace plen characters before dot with argument string.  Control-J
- * characters in st are interpreted as newlines.  There is a casehack
- * disable flag (normally it likes to match case of replacement to what
- * was there).
- */
-int
-lreplace(RSIZE plen, char *st)
-{
-	RSIZE	rlen;	/* replacement length		 */
-	int s;
-
-	if ((s = checkdirty(curbp)) != TRUE)
-		return (s);
-	if (curbp->b_flag & BFREADONLY) {
-		ewprintf("Buffer is read only");
-		return (FALSE);
-	}
-	undo_boundary_enable(FFRAND, 0);
-
-	(void)backchar(FFARG | FFRAND, (int)plen);
-	(void)ldelete(plen, KNONE);
-
-	rlen = strlen(st);
-	region_put_data(st, rlen);
-	lchange(WFFULL);
-
-	undo_boundary_enable(FFRAND, 1);
-	return (TRUE);
-}
-
-/*
- * Allocate and return the supplied line as a C string
- */
-char *
-linetostr(const struct line *ln)
-{
-	int	 len;
-	char	*line;
-
-	len = llength(ln);
-	if (len == INT_MAX)  /* (len + 1) overflow */
-		return (NULL);
-
-	if ((line = malloc(len + 1)) == NULL)
-		return (NULL);
-
-	(void)memcpy(line, ltext(ln), len);
-	line[len] = '\0';
-
-	return (line);
-}