diff options
Diffstat (limited to 'usr.bin/vi/ex/ex_init.c')
| -rw-r--r-- | usr.bin/vi/ex/ex_init.c | 203 |
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 new file mode 100644 index 000000000000..cef766757303 --- /dev/null +++ b/usr.bin/vi/ex/ex_init.c @@ -0,0 +1,203 @@ +/*- + * 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); +} |