ex/ex_util.c

   1 /*-
   2  * Copyright (c) 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1993, 1994, 1995, 1996
   5  *      Keith Bostic.  All rights reserved.
   6  *
   7  * See the LICENSE file for redistribution information.
   8  */
   9
  10 #include "config.h"
  11
  12 #ifndef lint
  13 static const char sccsid[] = "$Id: ex_util.c,v 10.26 2000/04/21 19:00:38 skimo Exp $ (Berkeley) $Date: 2000/04/21 19:00:38 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/stat.h>
  19
  20 #include <bitstring.h>
  21 #include <errno.h>
  22 #include <limits.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <string.h>
  26 #include <unistd.h>
  27
  28 #include "../common/common.h"
  29
  30 /*
  31  * ex_cinit --
  32  *      Create an EX command structure.
  33  *
  34  * PUBLIC: void ex_cinit __P((SCR *, EXCMD *, int, int, db_recno_t, db_recno_t, int));
  35  */
  36 void
  37 ex_cinit(sp, cmdp, cmd_id, naddr, lno1, lno2, force)
  38         SCR *sp;
  39         EXCMD *cmdp;
  40         int cmd_id, force, naddr;
  41         db_recno_t lno1, lno2;
  42 {
  43         memset(cmdp, 0, sizeof(EXCMD));
  44         cmdp->cmd = &cmds[cmd_id];
  45         cmdp->addrcnt = naddr;
  46         cmdp->addr1.lno = lno1;
  47         cmdp->addr2.lno = lno2;
  48         cmdp->addr1.cno = cmdp->addr2.cno = 1;
  49         if (force)
  50                 cmdp->iflags |= E_C_FORCE;
  51         (void)argv_init(sp, cmdp);
  52 }
  53
  54 /*
  55  * ex_getline --
  56  *      Return a line from the file.
  57  *
  58  * PUBLIC: int ex_getline __P((SCR *, FILE *, size_t *));
  59  */
  60 int
  61 ex_getline(sp, fp, lenp)
  62         SCR *sp;
  63         FILE *fp;
  64         size_t *lenp;
  65 {
  66         EX_PRIVATE *exp;
  67         size_t off;
  68         int ch;
  69         char *p;
  70
  71         exp = EXP(sp);
  72         for (errno = 0, off = 0, p = exp->ibp;;) {
  73                 if (off >= exp->ibp_len) {
  74                         BINC_RET(sp, exp->ibp, exp->ibp_len, off + 1);
  75                         p = exp->ibp + off;
  76                 }
  77                 if ((ch = getc(fp)) == EOF && !feof(fp)) {
  78                         if (errno == EINTR) {
  79                                 errno = 0;
  80                                 clearerr(fp);
  81                                 continue;
  82                         }
  83                         return (1);
  84                 }
  85                 if (ch == EOF || ch == '\n') {
  86                         if (ch == EOF && !off)
  87                                 return (1);
  88                         *lenp = off;
  89                         return (0);
  90                 }
  91                 *p++ = ch;
  92                 ++off;
  93         }
  94         /* NOTREACHED */
  95 }
  96
  97 /*
  98  * ex_ncheck --
  99  *      Check for more files to edit.
 100  *
 101  * PUBLIC: int ex_ncheck __P((SCR *, int));
 102  */
 103 int
 104 ex_ncheck(sp, force)
 105         SCR *sp;
 106         int force;
 107 {
 108         char **ap;
 109
 110         /*
 111          * !!!
 112          * Historic practice: quit! or two quit's done in succession
 113          * (where ZZ counts as a quit) didn't check for other files.
 114          */
 115         if (!force && sp->ccnt != sp->q_ccnt + 1 &&
 116             sp->cargv != NULL && sp->cargv[1] != NULL) {
 117                 sp->q_ccnt = sp->ccnt;
 118
 119                 for (ap = sp->cargv + 1; *ap != NULL; ++ap);
 120                 msgq(sp, M_ERR,
 121                     "167|%d more files to edit", (ap - sp->cargv) - 1);
 122
 123                 return (1);
 124         }
 125         return (0);
 126 }
 127
 128 /*
 129  * ex_init --
 130  *      Init the screen for ex.
 131  *
 132  * PUBLIC: int ex_init __P((SCR *));
 133  */
 134 int
 135 ex_init(sp)
 136         SCR *sp;
 137 {
 138         GS *gp;
 139
 140         gp = sp->gp;
 141
 142         if (gp->scr_screen(sp, SC_EX))
 143                 return (1);
 144         (void)gp->scr_attr(sp, SA_ALTERNATE, 0);
 145
 146         sp->rows = O_VAL(sp, O_LINES);
 147         sp->cols = O_VAL(sp, O_COLUMNS);
 148
 149         F_CLR(sp, SC_VI);
 150         F_SET(sp, SC_EX | SC_SCR_EX);
 151         return (0);
 152 }
 153
 154 /*
 155  * ex_emsg --
 156  *      Display a few common ex and vi error messages.
 157  *
 158  * PUBLIC: void ex_emsg __P((SCR *, char *, exm_t));
 159  */
 160 void
 161 ex_emsg(sp, p, which)
 162         SCR *sp;
 163         char *p;
 164         exm_t which;
 165 {
 166         switch (which) {
 167         case EXM_EMPTYBUF:
 168                 msgq(sp, M_ERR, "168|Buffer %s is empty", p);
 169                 break;
 170         case EXM_FILECOUNT:
 171                  msgq_str(sp, M_ERR, p,
 172                      "144|%s: expanded into too many file names");
 173                 break;
 174         case EXM_NOCANON:
 175                 msgq(sp, M_ERR,
 176                     "283|The %s command requires the ex terminal interface", p);
 177                 break;
 178         case EXM_NOCANON_F:
 179                 msgq(sp, M_ERR,
 180                     "272|That form of %s requires the ex terminal interface",
 181                     p);
 182                 break;
 183         case EXM_NOFILEYET:
 184                 if (p == NULL)
 185                         msgq(sp, M_ERR,
 186                             "274|Command failed, no file read in yet.");
 187                 else
 188                         msgq(sp, M_ERR,
 189         "173|The %s command requires that a file have already been read in", p);
 190                 break;
 191         case EXM_NOPREVBUF:
 192                 msgq(sp, M_ERR, "171|No previous buffer to execute");
 193                 break;
 194         case EXM_NOPREVRE:
 195                 msgq(sp, M_ERR, "172|No previous regular expression");
 196                 break;
 197         case EXM_NOSUSPEND:
 198                 msgq(sp, M_ERR, "230|This screen may not be suspended");
 199                 break;
 200         case EXM_SECURE:
 201                 msgq(sp, M_ERR,
 202 "290|The %s command is not supported when the secure edit option is set", p);
 203                 break;
 204         case EXM_SECURE_F:
 205                 msgq(sp, M_ERR,
 206 "284|That form of %s is not supported when the secure edit option is set", p);
 207                 break;
 208         case EXM_USAGE:
 209                 msgq(sp, M_ERR, "174|Usage: %s", p);
 210                 break;
 211         }
 212 }