diff options
Diffstat (limited to 'usr.bin/vi/nvi/v_init.c')
| -rw-r--r-- | usr.bin/vi/nvi/v_init.c | 228 |
1 files changed, 228 insertions, 0 deletions
diff --git a/usr.bin/vi/nvi/v_init.c b/usr.bin/vi/nvi/v_init.c new file mode 100644 index 000000000000..f0d2facf4ea3 --- /dev/null +++ b/usr.bin/vi/nvi/v_init.c @@ -0,0 +1,228 @@ +/*- + * Copyright (c) 1992, 1993 + * 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[] = "@(#)v_init.c 8.18 (Berkeley) 1/9/94"; +#endif /* not lint */ + +#include <sys/types.h> + +#include <errno.h> +#include <stdlib.h> +#include <string.h> + +#include "vi.h" +#include "vcmd.h" +#include "excmd.h" + +static int v_comment __P((SCR *, EXF *)); + +/* + * v_screen_copy -- + * Copy vi screen. + */ +int +v_screen_copy(orig, sp) + SCR *orig, *sp; +{ + VI_PRIVATE *ovip, *nvip; + + /* Create the private vi structure. */ + CALLOC_RET(orig, nvip, VI_PRIVATE *, 1, sizeof(VI_PRIVATE)); + sp->vi_private = nvip; + + if (orig == NULL) { + nvip->inc_lastch = '+'; + nvip->inc_lastval = 1; + } else { + ovip = VIP(orig); + + /* User can replay the last input, but nothing else. */ + if (ovip->rep_len != 0) { + MALLOC(orig, nvip->rep, char *, ovip->rep_len); + if (nvip->rep != NULL) { + memmove(nvip->rep, ovip->rep, ovip->rep_len); + nvip->rep_len = ovip->rep_len; + } + } + + nvip->inc_lastch = ovip->inc_lastch; + nvip->inc_lastval = ovip->inc_lastval; + + if (ovip->paragraph != NULL && + (nvip->paragraph = strdup(ovip->paragraph)) == NULL) { + msgq(sp, M_SYSERR, NULL); + return (1); + } + } + return (0); +} + +/* + * v_screen_end -- + * End a vi screen. + */ +int +v_screen_end(sp) + SCR *sp; +{ + VI_PRIVATE *vip; + + vip = VIP(sp); + + if (vip->rep != NULL) + FREE(vip->rep, vip->rep_len); + + if (vip->paragraph != NULL) + FREE(vip->paragraph, vip->paragraph_len); + + /* Free private memory. */ + FREE(vip, sizeof(VI_PRIVATE)); + sp->vi_private = NULL; + + return (0); +} + +/* + * v_init -- + * Initialize vi. + */ +int +v_init(sp, ep) + SCR *sp; + EXF *ep; +{ + size_t len; + + /* + * The default address is line 1, column 0. 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 (sp->lno != 1 || sp->cno != 0) { + 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 { + sp->lno = 1; + sp->cno = 0; + + if (O_ISSET(sp, O_COMMENT) && v_comment(sp, ep)) + return (1); + } + + /* Reset strange attraction. */ + sp->rcm = 0; + sp->rcmflags = 0; + + /* Make ex display to a special function. */ + if ((sp->stdfp = fwopen(sp, sp->s_ex_write)) == NULL) { + msgq(sp, M_SYSERR, "ex output"); + return (1); + } +#ifdef MAKE_EX_OUTPUT_LINE_BUFFERED + (void)setvbuf(sp->stdfp, NULL, _IOLBF, 0); +#endif + + /* Display the status line. */ + return (status(sp, ep, sp->lno, 0)); +} + +/* + * v_end -- + * End vi session. + */ +int +v_end(sp) + SCR *sp; +{ + /* Close down ex output file descriptor. */ + (void)fclose(sp->stdfp); + + return (0); +} + +/* + * v_optchange -- + * Handle change of options for vi. + */ +int +v_optchange(sp, opt) + SCR *sp; + int opt; +{ + switch (opt) { + case O_PARAGRAPHS: + case O_SECTIONS: + return (v_buildparagraph(sp)); + } + return (0); +} + +/* + * v_comment -- + * Skip the first comment. + */ +static int +v_comment(sp, ep) + SCR *sp; + EXF *ep; +{ + recno_t lno; + size_t len; + char *p; + + for (lno = 1; + (p = file_gline(sp, ep, lno, &len)) != NULL && len == 0; ++lno); + if (p == NULL || len <= 1 || memcmp(p, "/*", 2)) + return (0); + do { + for (; len; --len, ++p) + if (p[0] == '*' && len > 1 && p[1] == '/') { + sp->lno = lno; + return (0); + } + } while ((p = file_gline(sp, ep, ++lno, &len)) != NULL); + return (0); +} |