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-rw-r--r--usr.bin/vi/ex/ex_init.c203
1 files changed, 203 insertions, 0 deletions
diff --git a/usr.bin/vi/ex/ex_init.c b/usr.bin/vi/ex/ex_init.c
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+++ b/usr.bin/vi/ex/ex_init.c
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+/*-
+ * Copyright (c) 1992, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgement:
+ * This product includes software developed by the University of
+ * California, Berkeley and its contributors.
+ * 4. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef lint
+static char sccsid[] = "@(#)ex_init.c 8.14 (Berkeley) 3/18/94";
+#endif /* not lint */
+
+#include <sys/types.h>
+#include <queue.h>
+#include <sys/time.h>
+
+#include <bitstring.h>
+#include <errno.h>
+#include <limits.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <termios.h>
+
+#include <db.h>
+#include <regex.h>
+
+#include "vi.h"
+#include "excmd.h"
+#include "tag.h"
+
+/*
+ * ex_screen_copy --
+ * Copy ex screen.
+ */
+int
+ex_screen_copy(orig, sp)
+ SCR *orig, *sp;
+{
+ EX_PRIVATE *oexp, *nexp;
+
+ /* Create the private ex structure. */
+ CALLOC_RET(orig, nexp, EX_PRIVATE *, 1, sizeof(EX_PRIVATE));
+ sp->ex_private = nexp;
+
+ /* Initialize queues. */
+ TAILQ_INIT(&nexp->tagq);
+ TAILQ_INIT(&nexp->tagfq);
+ TAILQ_INIT(&nexp->cdq);
+ CIRCLEQ_INIT(&nexp->rangeq);
+
+ if (orig == NULL) {
+ nexp->at_lbuf_set = 0;
+ } else {
+ oexp = EXP(orig);
+
+ nexp->at_lbuf = oexp->at_lbuf;
+ nexp->at_lbuf_set = oexp->at_lbuf_set;
+
+ if (oexp->lastbcomm != NULL &&
+ (nexp->lastbcomm = strdup(oexp->lastbcomm)) == NULL) {
+ msgq(sp, M_SYSERR, NULL);
+ return(1);
+ }
+
+ if (ex_tagcopy(orig, sp))
+ return (1);
+ }
+
+ nexp->lastcmd = &cmds[C_PRINT];
+ return (0);
+}
+
+/*
+ * ex_screen_end --
+ * End a vi screen.
+ */
+int
+ex_screen_end(sp)
+ SCR *sp;
+{
+ EX_PRIVATE *exp;
+ int rval;
+
+ rval = 0;
+ exp = EXP(sp);
+
+ if (argv_free(sp))
+ rval = 1;
+
+ if (exp->ibp != NULL)
+ FREE(exp->ibp, exp->ibp_len);
+
+ if (exp->lastbcomm != NULL)
+ FREE(exp->lastbcomm, strlen(exp->lastbcomm) + 1);
+
+ if (ex_tagfree(sp))
+ rval = 1;
+
+ if (ex_cdfree(sp))
+ rval = 1;
+
+ /* Free private memory. */
+ FREE(exp, sizeof(EX_PRIVATE));
+ sp->ex_private = NULL;
+
+ return (rval);
+}
+
+/*
+ * ex_init --
+ * Initialize ex.
+ */
+int
+ex_init(sp, ep)
+ SCR *sp;
+ EXF *ep;
+{
+ size_t len;
+
+ /*
+ * The default address is the last line of the file. If the address
+ * set bit is on for this file, load the address, ensuring that it
+ * exists.
+ */
+ if (F_ISSET(sp->frp, FR_CURSORSET)) {
+ sp->lno = sp->frp->lno;
+ sp->cno = sp->frp->cno;
+
+ if (file_gline(sp, ep, sp->lno, &len) == NULL) {
+ if (file_lline(sp, ep, &sp->lno))
+ return (1);
+ if (sp->lno == 0)
+ sp->lno = 1;
+ sp->cno = 0;
+ } else if (sp->cno >= len)
+ sp->cno = 0;
+ } else {
+ if (file_lline(sp, ep, &sp->lno))
+ return (1);
+ if (sp->lno == 0)
+ sp->lno = 1;
+ sp->cno = 0;
+ }
+
+ /* Display the status line. */
+ return (status(sp, ep, sp->lno, 0));
+}
+
+/*
+ * ex_end --
+ * End ex session.
+ */
+int
+ex_end(sp)
+ SCR *sp;
+{
+ return (0);
+}
+
+/*
+ * ex_optchange --
+ * Handle change of options for vi.
+ */
+int
+ex_optchange(sp, opt)
+ SCR *sp;
+ int opt;
+{
+ switch (opt) {
+ case O_CDPATH:
+ return (ex_cdalloc(sp, O_STR(sp, O_CDPATH)));
+ case O_TAGS:
+ return (ex_tagalloc(sp, O_STR(sp, O_TAGS)));
+ }
+ return (0);
+}