ex/ex_args.c

   1 /*-
   2  * Copyright (c) 1991, 1993, 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  * Copyright (c) 1991, 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_args.c,v 10.16 1996/07/13 14:31:08 bostic Exp $ (Berkeley) $Date: 1996/07/13 14:31:08 $";
  14 #endif /* not lint */
  15
  16 #include <sys/types.h>
  17 #include <sys/queue.h>
  18 #include <sys/time.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
  27 #include "../common/common.h"
  28 #include "../vi/vi.h"
  29
  30 static int ex_N_next __P((SCR *, EXCMD *));
  31
  32 /*
  33  * ex_next -- :next [+cmd] [files]
  34  *      Edit the next file, optionally setting the list of files.
  35  *
  36  * !!!
  37  * The :next command behaved differently from the :rewind command in
  38  * historic vi.  See nvi/docs/autowrite for details, but the basic
  39  * idea was that it ignored the force flag if the autowrite flag was
  40  * set.  This implementation handles them all identically.
  41  *
  42  * PUBLIC: int ex_next __P((SCR *, EXCMD *));
  43  */
  44 int
  45 ex_next(sp, cmdp)
  46         SCR *sp;
  47         EXCMD *cmdp;
  48 {
  49         ARGS **argv;
  50         FREF *frp;
  51         int noargs;
  52         char **ap;
  53
  54         /* Check for file to move to. */
  55         if (cmdp->argc == 0 && (sp->cargv == NULL || sp->cargv[1] == NULL)) {
  56                 msgq(sp, M_ERR, "111|No more files to edit");
  57                 return (1);
  58         }
  59
  60         if (F_ISSET(cmdp, E_NEWSCREEN)) {
  61                 /* By default, edit the next file in the old argument list. */
  62                 if (cmdp->argc == 0) {
  63                         if (argv_exp0(sp,
  64                             cmdp, sp->cargv[1], strlen(sp->cargv[1])))
  65                                 return (1);
  66                         return (ex_edit(sp, cmdp));
  67                 }
  68                 return (ex_N_next(sp, cmdp));
  69         }
  70
  71         /* Check modification. */
  72         if (file_m1(sp,
  73             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
  74                 return (1);
  75
  76         /* Any arguments are a replacement file list. */
  77         if (cmdp->argc) {
  78                 /* Free the current list. */
  79                 if (!F_ISSET(sp, SC_ARGNOFREE) && sp->argv != NULL) {
  80                         for (ap = sp->argv; *ap != NULL; ++ap)
  81                                 free(*ap);
  82                         free(sp->argv);
  83                 }
  84                 F_CLR(sp, SC_ARGNOFREE | SC_ARGRECOVER);
  85                 sp->cargv = NULL;
  86
  87                 /* Create a new list. */
  88                 CALLOC_RET(sp,
  89                     sp->argv, char **, cmdp->argc + 1, sizeof(char *));
  90                 for (ap = sp->argv,
  91                     argv = cmdp->argv; argv[0]->len != 0; ++ap, ++argv)
  92                         if ((*ap =
  93                             v_strdup(sp, argv[0]->bp, argv[0]->len)) == NULL)
  94                                 return (1);
  95                 *ap = NULL;
  96
  97                 /* Switch to the first file. */
  98                 sp->cargv = sp->argv;
  99                 if ((frp = file_add(sp, *sp->cargv)) == NULL)
 100                         return (1);
 101                 noargs = 0;
 102
 103                 /* Display a file count with the welcome message. */
 104                 F_SET(sp, SC_STATUS_CNT);
 105         } else {
 106                 if ((frp = file_add(sp, sp->cargv[1])) == NULL)
 107                         return (1);
 108                 if (F_ISSET(sp, SC_ARGRECOVER))
 109                         F_SET(frp, FR_RECOVER);
 110                 noargs = 1;
 111         }
 112
 113         if (file_init(sp, frp, NULL, FS_SETALT |
 114             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 115                 return (1);
 116         if (noargs)
 117                 ++sp->cargv;
 118
 119         F_SET(sp, SC_FSWITCH);
 120         return (0);
 121 }
 122
 123 /*
 124  * ex_N_next --
 125  *      New screen version of ex_next.
 126  */
 127 static int
 128 ex_N_next(sp, cmdp)
 129         SCR *sp;
 130         EXCMD *cmdp;
 131 {
 132         SCR *new;
 133         FREF *frp;
 134
 135         /* Get a new screen. */
 136         if (screen_init(sp->gp, sp, &new))
 137                 return (1);
 138         if (vs_split(sp, new, 0)) {
 139                 (void)screen_end(new);
 140                 return (1);
 141         }
 142
 143         /* Get a backing file. */
 144         if ((frp = file_add(new, cmdp->argv[0]->bp)) == NULL ||
 145             file_init(new, frp, NULL,
 146             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
 147                 (void)vs_discard(new, NULL);
 148                 (void)screen_end(new);
 149                 return (1);
 150         }
 151
 152         /* The arguments are a replacement file list. */
 153         new->cargv = new->argv = ex_buildargv(sp, cmdp, NULL);
 154
 155         /* Display a file count with the welcome message. */
 156         F_SET(new, SC_STATUS_CNT);
 157
 158         /* Set up the switch. */
 159         sp->nextdisp = new;
 160         F_SET(sp, SC_SSWITCH);
 161
 162         return (0);
 163 }
 164
 165 /*
 166  * ex_prev -- :prev
 167  *      Edit the previous file.
 168  *
 169  * PUBLIC: int ex_prev __P((SCR *, EXCMD *));
 170  */
 171 int
 172 ex_prev(sp, cmdp)
 173         SCR *sp;
 174         EXCMD *cmdp;
 175 {
 176         FREF *frp;
 177
 178         if (sp->cargv == sp->argv) {
 179                 msgq(sp, M_ERR, "112|No previous files to edit");
 180                 return (1);
 181         }
 182
 183         if (F_ISSET(cmdp, E_NEWSCREEN)) {
 184                 if (argv_exp0(sp, cmdp, sp->cargv[-1], strlen(sp->cargv[-1])))
 185                         return (1);
 186                 return (ex_edit(sp, cmdp));
 187         }
 188
 189         if (file_m1(sp,
 190             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
 191                 return (1);
 192
 193         if ((frp = file_add(sp, sp->cargv[-1])) == NULL)
 194                 return (1);
 195
 196         if (file_init(sp, frp, NULL, FS_SETALT |
 197             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 198                 return (1);
 199         --sp->cargv;
 200
 201         F_SET(sp, SC_FSWITCH);
 202         return (0);
 203 }
 204
 205 /*
 206  * ex_rew -- :rew
 207  *      Re-edit the list of files.
 208  *
 209  * !!!
 210  * Historic practice was that all files would start editing at the beginning
 211  * of the file.  We don't get this right because we may have multiple screens
 212  * and we can't clear the FR_CURSORSET bit for a single screen.  I don't see
 213  * anyone noticing, but if they do, we'll have to put information into the SCR
 214  * structure so we can keep track of it.
 215  *
 216  * PUBLIC: int ex_rew __P((SCR *, EXCMD *));
 217  */
 218 int
 219 ex_rew(sp, cmdp)
 220         SCR *sp;
 221         EXCMD *cmdp;
 222 {
 223         FREF *frp;
 224
 225         /*
 226          * !!!
 227          * Historic practice -- you can rewind to the current file.
 228          */
 229         if (sp->argv == NULL) {
 230                 msgq(sp, M_ERR, "113|No previous files to rewind");
 231                 return (1);
 232         }
 233
 234         if (file_m1(sp,
 235             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
 236                 return (1);
 237
 238         /* Switch to the first one. */
 239         sp->cargv = sp->argv;
 240         if ((frp = file_add(sp, *sp->cargv)) == NULL)
 241                 return (1);
 242         if (file_init(sp, frp, NULL, FS_SETALT |
 243             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 244                 return (1);
 245
 246         /* Switch and display a file count with the welcome message. */
 247         F_SET(sp, SC_FSWITCH | SC_STATUS_CNT);
 248
 249         return (0);
 250 }
 251
 252 /*
 253  * ex_args -- :args
 254  *      Display the list of files.
 255  *
 256  * PUBLIC: int ex_args __P((SCR *, EXCMD *));
 257  */
 258 int
 259 ex_args(sp, cmdp)
 260         SCR *sp;
 261         EXCMD *cmdp;
 262 {
 263         GS *gp;
 264         int cnt, col, len, sep;
 265         char **ap;
 266
 267         if (sp->argv == NULL) {
 268                 (void)msgq(sp, M_ERR, "114|No file list to display");
 269                 return (0);
 270         }
 271
 272         gp = sp->gp;
 273         col = len = sep = 0;
 274         for (cnt = 1, ap = sp->argv; *ap != NULL; ++ap) {
 275                 col += len = strlen(*ap) + sep + (ap == sp->cargv ? 2 : 0);
 276                 if (col >= sp->cols - 1) {
 277                         col = len;
 278                         sep = 0;
 279                         (void)ex_puts(sp, "\n");
 280                 } else if (cnt != 1) {
 281                         sep = 1;
 282                         (void)ex_puts(sp, " ");
 283                 }
 284                 ++cnt;
 285
 286                 (void)ex_printf(sp, "%s%s%s", ap == sp->cargv ? "[" : "",
 287                     *ap, ap == sp->cargv ? "]" : "");
 288                 if (INTERRUPTED(sp))
 289                         break;
 290         }
 291         (void)ex_puts(sp, "\n");
 292         return (0);
 293 }
 294
 295 /*
 296  * ex_buildargv --
 297  *      Build a new file argument list.
 298  *
 299  * PUBLIC: char **ex_buildargv __P((SCR *, EXCMD *, char *));
 300  */
 301 char **
 302 ex_buildargv(sp, cmdp, name)
 303         SCR *sp;
 304         EXCMD *cmdp;
 305         char *name;
 306 {
 307         ARGS **argv;
 308         int argc;
 309         char **ap, **s_argv;
 310
 311         argc = cmdp == NULL ? 1 : cmdp->argc;
 312         CALLOC(sp, s_argv, char **, argc + 1, sizeof(char *));
 313         if ((ap = s_argv) == NULL)
 314                 return (NULL);
 315
 316         if (cmdp == NULL) {
 317                 if ((*ap = v_strdup(sp, name, strlen(name))) == NULL)
 318                         return (NULL);
 319                 ++ap;
 320         } else
 321                 for (argv = cmdp->argv; argv[0]->len != 0; ++ap, ++argv)
 322                         if ((*ap =
 323                             v_strdup(sp, argv[0]->bp, argv[0]->len)) == NULL)
 324                                 return (NULL);
 325         *ap = NULL;
 326         return (s_argv);
 327 }