1 files changed, 231 insertions, 0 deletions
diff --git a/contrib/nvi/common/put.c b/contrib/nvi/common/put.c
new file mode 100644
index 000000000000..8c0ca4b7c14f
--- /dev/null
+++ b/contrib/nvi/common/put.c
@@ -0,0 +1,231 @@
+/*-
+ * Copyright (c) 1992, 1993, 1994
+ *	The Regents of the University of California.  All rights reserved.
+ * Copyright (c) 1992, 1993, 1994, 1995, 1996
+ *	Keith Bostic.  All rights reserved.
+ *
+ * See the LICENSE file for redistribution information.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)put.c	10.11 (Berkeley) 9/23/96";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <sys/queue.h>
+
+#include <bitstring.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "common.h"
+
+/*
+ * put --
+ *	Put text buffer contents into the file.
+ *
+ * PUBLIC: int put __P((SCR *, CB *, CHAR_T *, MARK *, MARK *, int));
+ */
+int
+put(sp, cbp, namep, cp, rp, append)
+	SCR *sp;
+	CB *cbp;
+	CHAR_T *namep;
+	MARK *cp, *rp;
+	int append;
+{
+	CHAR_T name;
+	TEXT *ltp, *tp;
+	recno_t lno;
+	size_t blen, clen, len;
+	int rval;
+	char *bp, *p, *t;
+
+	if (cbp == NULL)
+		if (namep == NULL) {
+			cbp = sp->gp->dcbp;
+			if (cbp == NULL) {
+				msgq(sp, M_ERR,
+				    "053|The default buffer is empty");
+				return (1);
+			}
+		} else {
+			name = *namep;
+			CBNAME(sp, cbp, name);
+			if (cbp == NULL) {
+				msgq(sp, M_ERR, "054|Buffer %s is empty",
+				    KEY_NAME(sp, name));
+				return (1);
+			}
+		}
+	tp = cbp->textq.cqh_first;
+
+	/*
+	 * It's possible to do a put into an empty file, meaning that the cut
+	 * buffer simply becomes the file.  It's a special case so that we can
+	 * ignore it in general.
+	 *
+	 * !!!
+	 * Historically, pasting into a file with no lines in vi would preserve
+	 * the single blank line.  This is surely a result of the fact that the
+	 * historic vi couldn't deal with a file that had no lines in it.  This
+	 * implementation treats that as a bug, and does not retain the blank
+	 * line.
+	 *
+	 * Historical practice is that the cursor ends at the first character
+	 * in the file.
+	 */
+	if (cp->lno == 1) {
+		if (db_last(sp, &lno))
+			return (1);
+		if (lno == 0) {
+			for (; tp != (void *)&cbp->textq;
+			    ++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
+				if (db_append(sp, 1, lno, tp->lb, tp->len))
+					return (1);
+			rp->lno = 1;
+			rp->cno = 0;
+			return (0);
+		}
+	}
+
+	/* If a line mode buffer, append each new line into the file. */
+	if (F_ISSET(cbp, CB_LMODE)) {
+		lno = append ? cp->lno : cp->lno - 1;
+		rp->lno = lno + 1;
+		for (; tp != (void *)&cbp->textq;
+		    ++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
+			if (db_append(sp, 1, lno, tp->lb, tp->len))
+				return (1);
+		rp->cno = 0;
+		(void)nonblank(sp, rp->lno, &rp->cno);
+		return (0);
+	}
+
+	/*
+	 * If buffer was cut in character mode, replace the current line with
+	 * one built from the portion of the first line to the left of the
+	 * split plus the first line in the CB.  Append each intermediate line
+	 * in the CB.  Append a line built from the portion of the first line
+	 * to the right of the split plus the last line in the CB.
+	 *
+	 * Get the first line.
+	 */
+	lno = cp->lno;
+	if (db_get(sp, lno, DBG_FATAL, &p, &len))
+		return (1);
+
+	GET_SPACE_RET(sp, bp, blen, tp->len + len + 1);
+	t = bp;
+
+	/* Original line, left of the split. */
+	if (len > 0 && (clen = cp->cno + (append ? 1 : 0)) > 0) {
+		memcpy(bp, p, clen);
+		p += clen;
+		t += clen;
+	}
+
+	/* First line from the CB. */
+	if (tp->len != 0) {
+		memcpy(t, tp->lb, tp->len);
+		t += tp->len;
+	}
+
+	/* Calculate length left in the original line. */
+	clen = len == 0 ? 0 : len - (cp->cno + (append ? 1 : 0));
+
+	/*
+	 * !!!
+	 * In the historical 4BSD version of vi, character mode puts within
+	 * a single line have two cursor behaviors: if the put is from the
+	 * unnamed buffer, the cursor moves to the character inserted which
+	 * appears last in the file.  If the put is from a named buffer,
+	 * the cursor moves to the character inserted which appears first
+	 * in the file.  In System III/V, it was changed at some point and
+	 * the cursor always moves to the first character.  In both versions
+	 * of vi, character mode puts that cross line boundaries leave the
+	 * cursor on the first character.  Nvi implements the System III/V
+	 * behavior, and expect POSIX.2 to do so as well.
+	 */
+	rp->lno = lno;
+	rp->cno = len == 0 ? 0 : sp->cno + (append && tp->len ? 1 : 0);
+
+	/*
+	 * If no more lines in the CB, append the rest of the original
+	 * line and quit.  Otherwise, build the last line before doing
+	 * the intermediate lines, because the line changes will lose
+	 * the cached line.
+	 */
+	if (tp->q.cqe_next == (void *)&cbp->textq) {
+		if (clen > 0) {
+			memcpy(t, p, clen);
+			t += clen;
+		}
+		if (db_set(sp, lno, bp, t - bp))
+			goto err;
+		if (sp->rptlchange != lno) {
+			sp->rptlchange = lno;
+			++sp->rptlines[L_CHANGED];
+		}
+	} else {
+		/*
+		 * Have to build both the first and last lines of the
+		 * put before doing any sets or we'll lose the cached
+		 * line.  Build both the first and last lines in the
+		 * same buffer, so we don't have to have another buffer
+		 * floating around.
+		 *
+		 * Last part of original line; check for space, reset
+		 * the pointer into the buffer.
+		 */
+		ltp = cbp->textq.cqh_last;
+		len = t - bp;
+		ADD_SPACE_RET(sp, bp, blen, ltp->len + clen);
+		t = bp + len;
+
+		/* Add in last part of the CB. */
+		memcpy(t, ltp->lb, ltp->len);
+		if (clen)
+			memcpy(t + ltp->len, p, clen);
+		clen += ltp->len;
+
+		/*
+		 * Now: bp points to the first character of the first
+		 * line, t points to the last character of the last
+		 * line, t - bp is the length of the first line, and
+		 * clen is the length of the last.  Just figured you'd
+		 * want to know.
+		 *
+		 * Output the line replacing the original line.
+		 */
+		if (db_set(sp, lno, bp, t - bp))
+			goto err;
+		if (sp->rptlchange != lno) {
+			sp->rptlchange = lno;
+			++sp->rptlines[L_CHANGED];
+		}
+
+		/* Output any intermediate lines in the CB. */
+		for (tp = tp->q.cqe_next;
+		    tp->q.cqe_next != (void *)&cbp->textq;
+		    ++lno, ++sp->rptlines[L_ADDED], tp = tp->q.cqe_next)
+			if (db_append(sp, 1, lno, tp->lb, tp->len))
+				goto err;
+
+		if (db_append(sp, 1, lno, t, clen))
+			goto err;
+		++sp->rptlines[L_ADDED];
+	}
+	rval = 0;
+
+	if (0)
+err:		rval = 1;
+
+	FREE_SPACE(sp, bp, blen);
+	return (rval);
+}