vi/v_init.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * %sccs.include.redist.c%
   6  */
   7
   8 #ifndef lint
   9 static char sccsid[] = "$Id: v_init.c,v 8.15 1993/11/13 18:01:36 bostic Exp $ (Berkeley) $Date: 1993/11/13 18:01:36 $";
  10 #endif /* not lint */
  11
  12 #include <sys/types.h>
  13
  14 #include <errno.h>
  15 #include <stdlib.h>
  16 #include <string.h>
  17
  18 #include "vi.h"
  19 #include "vcmd.h"
  20 #include "excmd.h"
  21
  22 /*
  23  * v_screen_copy --
  24  *      Copy vi screen.
  25  */
  26 int
  27 v_screen_copy(orig, sp)
  28         SCR *orig, *sp;
  29 {
  30         VI_PRIVATE *ovip, *nvip;
  31
  32         /* Create the private vi structure. */
  33         if ((sp->vi_private = nvip = malloc(sizeof(VI_PRIVATE))) == NULL)
  34                 goto mem;
  35         memset(nvip, 0, sizeof(VI_PRIVATE));
  36
  37         if (orig == NULL) {
  38                 nvip->inc_lastch = '+';
  39                 nvip->inc_lastval = 1;
  40         } else {
  41                 ovip = VIP(orig);
  42
  43                 /* User can replay the last input, but nothing else. */
  44                 if (ovip->rep_len != 0)
  45                         if ((nvip->rep = malloc(ovip->rep_len)) == NULL)
  46                                 goto mem;
  47                         else {
  48                                 memmove(nvip->rep, ovip->rep, ovip->rep_len);
  49                                 nvip->rep_len = ovip->rep_len;
  50                         }
  51
  52                 nvip->inc_lastch = ovip->inc_lastch;
  53                 nvip->inc_lastval = ovip->inc_lastval;
  54
  55                 if (ovip->paragraph != NULL &&
  56                     (nvip->paragraph = strdup(ovip->paragraph)) == NULL) {
  57 mem:                    msgq(sp, M_SYSERR, NULL);
  58                         return (1);
  59                 }
  60         }
  61         return (0);
  62 }
  63
  64 /*
  65  * v_screen_end --
  66  *      End a vi screen.
  67  */
  68 int
  69 v_screen_end(sp)
  70         SCR *sp;
  71 {
  72         VI_PRIVATE *vip;
  73
  74         vip = VIP(sp);
  75
  76         if (vip->rep != NULL)
  77                 FREE(vip->rep, vip->rep_len);
  78
  79         if (vip->paragraph != NULL)
  80                 FREE(vip->paragraph, vip->paragraph_len);
  81
  82         FREE(vip, sizeof(VI_PRIVATE));
  83         return (0);
  84 }
  85
  86 /*
  87  * v_init --
  88  *      Initialize vi.
  89  */
  90 int
  91 v_init(sp, ep)
  92         SCR *sp;
  93         EXF *ep;
  94 {
  95         size_t len;
  96
  97         /*
  98          * The default address is line 1, column 0.  If the address set
  99          * bit is on for this file, load the address, ensuring that it
 100          * exists.
 101          */
 102         if (F_ISSET(sp->frp, FR_CURSORSET)) {
 103                 sp->lno = sp->frp->lno;
 104                 sp->cno = sp->frp->cno;
 105
 106                 if (file_gline(sp, ep, sp->lno, &len) == NULL) {
 107                         if (sp->lno != 1 || sp->cno != 0) {
 108                                 if (file_lline(sp, ep, &sp->lno))
 109                                         return (1);
 110                                 if (sp->lno == 0)
 111                                         sp->lno = 1;
 112                                 sp->cno = 0;
 113                         }
 114                 } else if (sp->cno >= len)
 115                         sp->cno = 0;
 116
 117         } else {
 118                 sp->lno = 1;
 119                 sp->cno = 0;
 120
 121                 if (O_ISSET(sp, O_COMMENT) && v_comment(sp, ep))
 122                         return (1);
 123         }
 124
 125         /* Reset strange attraction. */
 126         sp->rcm = 0;
 127         sp->rcmflags = 0;
 128
 129         /* Make ex display to a special function. */
 130         if ((sp->stdfp = fwopen(sp, sp->s_ex_write)) == NULL) {
 131                 msgq(sp, M_SYSERR, "ex output");
 132                 return (1);
 133         }
 134 #ifdef MAKE_EX_OUTPUT_LINE_BUFFERED
 135         (void)setvbuf(sp->stdfp, NULL, _IOLBF, 0);
 136 #endif
 137
 138         /* Display the status line. */
 139         return (status(sp, ep, sp->lno, 0));
 140 }
 141
 142 /*
 143  * v_end --
 144  *      End vi session.
 145  */
 146 int
 147 v_end(sp)
 148         SCR *sp;
 149 {
 150         /* Close down ex output file descriptor. */
 151         (void)fclose(sp->stdfp);
 152
 153         return (0);
 154 }
 155
 156 /*
 157  * v_optchange --
 158  *      Handle change of options for vi.
 159  */
 160 int
 161 v_optchange(sp, opt)
 162         SCR *sp;
 163         int opt;
 164 {
 165         switch (opt) {
 166         case O_PARAGRAPHS:
 167         case O_SECTIONS:
 168                 return (v_buildparagraph(sp));
 169         }
 170         return (0);
 171 }