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 10.32 2001/06/25 15:19:21 skimo Exp $ (Berkeley) $Date: 2001/06/25 15:19:21 $";
  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(SCR *sp, EXCMD *cmdp, int cmd_id, int naddr, db_recno_t lno1, db_recno_t lno2, int force)
  38 {
  39         memset(cmdp, 0, sizeof(EXCMD));
  40         cmdp->cmd = &cmds[cmd_id];
  41         cmdp->addrcnt = naddr;
  42         cmdp->addr1.lno = lno1;
  43         cmdp->addr2.lno = lno2;
  44         cmdp->addr1.cno = cmdp->addr2.cno = 1;
  45         if (force)
  46                 cmdp->iflags |= E_C_FORCE;
  47         (void)argv_init(sp, cmdp);
  48 }
  49
  50 /*
  51  * ex_getline --
  52  *      Return a line from the file.
  53  *
  54  * PUBLIC: int ex_getline __P((SCR *, FILE *, size_t *));
  55  */
  56 int
  57 ex_getline(SCR *sp, FILE *fp, size_t *lenp)
  58 {
  59         EX_PRIVATE *exp;
  60         size_t off;
  61         int ch;
  62         CHAR_T *p;
  63
  64         exp = EXP(sp);
  65         for (errno = 0, off = 0, p = exp->ibp;;) {
  66                 if (off * sizeof(CHAR_T) >= exp->ibp_len) {
  67                         BINC_RETW(sp, exp->ibp, exp->ibp_len, off + 1);
  68                         p = exp->ibp + off;
  69                 }
  70                 if ((ch = getc(fp)) == EOF && !feof(fp)) {
  71                         if (errno == EINTR) {
  72                                 errno = 0;
  73                                 clearerr(fp);
  74                                 continue;
  75                         }
  76                         return (1);
  77                 }
  78                 if (ch == EOF || ch == '\n') {
  79                         if (ch == EOF && !off)
  80                                 return (1);
  81                         *lenp = off;
  82                         return (0);
  83                 }
  84                 *p++ = ch;
  85                 ++off;
  86         }
  87         /* NOTREACHED */
  88 }
  89
  90 /*
  91  * ex_ncheck --
  92  *      Check for more files to edit.
  93  *
  94  * PUBLIC: int ex_ncheck __P((SCR *, int));
  95  */
  96 int
  97 ex_ncheck(SCR *sp, int force)
  98 {
  99         char **ap;
 100
 101         /*
 102          * !!!
 103          * Historic practice: quit! or two quit's done in succession
 104          * (where ZZ counts as a quit) didn't check for other files.
 105          */
 106         if (!force && sp->ccnt != sp->q_ccnt + 1 &&
 107             sp->cargv != NULL && sp->cargv[1] != NULL) {
 108                 sp->q_ccnt = sp->ccnt;
 109
 110                 for (ap = sp->cargv + 1; *ap != NULL; ++ap);
 111                 msgq(sp, M_ERR,
 112                     "167|%d more files to edit", (ap - sp->cargv) - 1);
 113
 114                 return (1);
 115         }
 116         return (0);
 117 }
 118
 119 /*
 120  * ex_init --
 121  *      Init the screen for ex.
 122  *
 123  * PUBLIC: int ex_init __P((SCR *));
 124  */
 125 int
 126 ex_init(SCR *sp)
 127 {
 128         GS *gp;
 129
 130         gp = sp->gp;
 131
 132         if (gp->scr_screen(sp, SC_EX))
 133                 return (1);
 134         (void)gp->scr_attr(sp, SA_ALTERNATE, 0);
 135
 136         sp->rows = O_VAL(sp, O_LINES);
 137         sp->cols = O_VAL(sp, O_COLUMNS);
 138
 139         F_CLR(sp, SC_VI);
 140         F_SET(sp, SC_EX | SC_SCR_EX);
 141         return (0);
 142 }
 143
 144 /*
 145  * ex_emsg --
 146  *      Display a few common ex and vi error messages.
 147  *
 148  * PUBLIC: void ex_wemsg __P((SCR *, CHAR_T *, exm_t));
 149  */
 150 void
 151 ex_wemsg(SCR* sp, CHAR_T *p, exm_t which)
 152 {
 153         char *np;
 154         size_t nlen;
 155
 156         if (p) INT2CHAR(sp, p, STRLEN(p), np, nlen);
 157         else np = NULL;
 158         ex_emsg(sp, np, which);
 159 }
 160
 161 /*
 162  * ex_emsg --
 163  *      Display a few common ex and vi error messages.
 164  *
 165  * PUBLIC: void ex_emsg __P((SCR *, char *, exm_t));
 166  */
 167 void
 168 ex_emsg(SCR *sp, char *p, exm_t which)
 169 {
 170         switch (which) {
 171         case EXM_EMPTYBUF:
 172                 msgq(sp, M_ERR, "168|Buffer %s is empty", p);
 173                 break;
 174         case EXM_FILECOUNT:
 175                  msgq_str(sp, M_ERR, p,
 176                      "144|%s: expanded into too many file names");
 177                 break;
 178         case EXM_LOCKED:
 179                 msgq(sp, M_ERR,
 180                     "Command failed, buffer is locked");
 181                 break;
 182         case EXM_NOCANON:
 183                 msgq(sp, M_ERR,
 184                     "283|The %s command requires the ex terminal interface", p);
 185                 break;
 186         case EXM_NOCANON_F:
 187                 msgq(sp, M_ERR,
 188                     "272|That form of %s requires the ex terminal interface",
 189                     p);
 190                 break;
 191         case EXM_NOFILEYET:
 192                 if (p == NULL)
 193                         msgq(sp, M_ERR,
 194                             "274|Command failed, no file read in yet.");
 195                 else
 196                         msgq(sp, M_ERR,
 197         "173|The %s command requires that a file have already been read in", p);
 198                 break;
 199         case EXM_NOPREVBUF:
 200                 msgq(sp, M_ERR, "171|No previous buffer to execute");
 201                 break;
 202         case EXM_NOPREVRE:
 203                 msgq(sp, M_ERR, "172|No previous regular expression");
 204                 break;
 205         case EXM_NOSUSPEND:
 206                 msgq(sp, M_ERR, "230|This screen may not be suspended");
 207                 break;
 208         case EXM_SECURE:
 209                 msgq(sp, M_ERR,
 210 "290|The %s command is not supported when the secure edit option is set", p);
 211                 break;
 212         case EXM_SECURE_F:
 213                 msgq(sp, M_ERR,
 214 "284|That form of %s is not supported when the secure edit option is set", p);
 215                 break;
 216         case EXM_USAGE:
 217                 msgq(sp, M_ERR, "174|Usage: %s", p);
 218                 break;
 219         }
 220 }