contrib/nvi2/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 #include <sys/types.h>
  13 #include <sys/queue.h>
  14 #include <sys/stat.h>
  15
  16 #include <bitstring.h>
  17 #include <errno.h>
  18 #include <limits.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <string.h>
  22 #include <unistd.h>
  23
  24 #include "../common/common.h"
  25
  26 /*
  27  * ex_cinit --
  28  *      Create an EX command structure.
  29  *
  30  * PUBLIC: void ex_cinit(SCR *, EXCMD *, int, int, recno_t, recno_t, int);
  31  */
  32 void
  33 ex_cinit(SCR *sp, EXCMD *cmdp, int cmd_id, int naddr, recno_t lno1, recno_t lno2, int force)
  34 {
  35         memset(cmdp, 0, sizeof(EXCMD));
  36         cmdp->cmd = &cmds[cmd_id];
  37         cmdp->addrcnt = naddr;
  38         cmdp->addr1.lno = lno1;
  39         cmdp->addr2.lno = lno2;
  40         cmdp->addr1.cno = cmdp->addr2.cno = 1;
  41         if (force)
  42                 cmdp->iflags |= E_C_FORCE;
  43         (void)argv_init(sp, cmdp);
  44 }
  45
  46 /*
  47  * ex_getline --
  48  *      Return a line from the file.
  49  *
  50  * PUBLIC: int ex_getline(SCR *, FILE *, size_t *);
  51  */
  52 int
  53 ex_getline(SCR *sp, FILE *fp, size_t *lenp)
  54 {
  55         EX_PRIVATE *exp;
  56         size_t off;
  57         int ch;
  58         char *p;
  59
  60         exp = EXP(sp);
  61         for (errno = 0, off = 0, p = exp->ibp;;) {
  62                 if (off >= exp->ibp_len) {
  63                         BINC_RETC(sp, exp->ibp, exp->ibp_len, off + 1);
  64                         p = exp->ibp + off;
  65                 }
  66                 if ((ch = getc(fp)) == EOF && !feof(fp)) {
  67                         if (errno == EINTR) {
  68                                 errno = 0;
  69                                 clearerr(fp);
  70                                 continue;
  71                         }
  72                         return (1);
  73                 }
  74                 if (ch == EOF || ch == '\n') {
  75                         if (ch == EOF && !off)
  76                                 return (1);
  77                         *lenp = off;
  78                         return (0);
  79                 }
  80                 *p++ = ch;
  81                 ++off;
  82         }
  83         /* NOTREACHED */
  84 }
  85
  86 /*
  87  * ex_ncheck --
  88  *      Check for more files to edit.
  89  *
  90  * PUBLIC: int ex_ncheck(SCR *, int);
  91  */
  92 int
  93 ex_ncheck(SCR *sp, int force)
  94 {
  95         char **ap;
  96
  97         /*
  98          * !!!
  99          * Historic practice: quit! or two quit's done in succession
 100          * (where ZZ counts as a quit) didn't check for other files.
 101          */
 102         if (!force && sp->ccnt != sp->q_ccnt + 1 &&
 103             sp->cargv != NULL && sp->cargv[1] != NULL) {
 104                 sp->q_ccnt = sp->ccnt;
 105
 106                 for (ap = sp->cargv + 1; *ap != NULL; ++ap);
 107                 msgq(sp, M_ERR,
 108                     "167|%d more files to edit", (int)(ap - sp->cargv) - 1);
 109
 110                 return (1);
 111         }
 112         return (0);
 113 }
 114
 115 /*
 116  * ex_init --
 117  *      Init the screen for ex.
 118  *
 119  * PUBLIC: int ex_init(SCR *);
 120  */
 121 int
 122 ex_init(SCR *sp)
 123 {
 124         GS *gp;
 125
 126         gp = sp->gp;
 127
 128         if (gp->scr_screen(sp, SC_EX))
 129                 return (1);
 130         (void)gp->scr_attr(sp, SA_ALTERNATE, 0);
 131
 132         sp->rows = O_VAL(sp, O_LINES);
 133         sp->cols = O_VAL(sp, O_COLUMNS);
 134
 135         F_CLR(sp, SC_VI);
 136         F_SET(sp, SC_EX | SC_SCR_EX);
 137         return (0);
 138 }
 139
 140 /*
 141  * ex_emsg --
 142  *      Display a few common ex and vi error messages.
 143  *
 144  * PUBLIC: void ex_wemsg(SCR *, CHAR_T *, exm_t);
 145  */
 146 void
 147 ex_wemsg(SCR* sp, CHAR_T *p, exm_t which)
 148 {
 149         char *np;
 150         size_t nlen;
 151
 152         if (p) INT2CHAR(sp, p, STRLEN(p), np, nlen);
 153         else np = NULL;
 154         ex_emsg(sp, np, which);
 155 }
 156
 157 /*
 158  * ex_emsg --
 159  *      Display a few common ex and vi error messages.
 160  *
 161  * PUBLIC: void ex_emsg(SCR *, char *, exm_t);
 162  */
 163 void
 164 ex_emsg(SCR *sp, char *p, 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 }