dist/nvi/ex/ex_args.c

   1 /*      $NetBSD: ex_args.c,v 1.2 2008/12/05 22:51:42 christos Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1991, 1993, 1994
   5  *      The Regents of the University of California.  All rights reserved.
   6  * Copyright (c) 1991, 1993, 1994, 1995, 1996
   7  *      Keith Bostic.  All rights reserved.
   8  *
   9  * See the LICENSE file for redistribution information.
  10  */
  11
  12 #include "config.h"
  13
  14 #ifndef lint
  15 static const char sccsid[] = "Id: ex_args.c,v 10.18 2001/06/25 15:19:14 skimo Exp (Berkeley) Date: 2001/06/25 15:19:14";
  16 #endif /* not lint */
  17
  18 #include <sys/types.h>
  19 #include <sys/queue.h>
  20 #include <sys/time.h>
  21
  22 #include <bitstring.h>
  23 #include <errno.h>
  24 #include <limits.h>
  25 #include <stdio.h>
  26 #include <stdlib.h>
  27 #include <string.h>
  28
  29 #include "../common/common.h"
  30 #include "../vi/vi.h"
  31
  32 static int ex_N_next __P((SCR *, EXCMD *));
  33
  34 /*
  35  * ex_next -- :next [+cmd] [files]
  36  *      Edit the next file, optionally setting the list of files.
  37  *
  38  * !!!
  39  * The :next command behaved differently from the :rewind command in
  40  * historic vi.  See nvi/docs/autowrite for details, but the basic
  41  * idea was that it ignored the force flag if the autowrite flag was
  42  * set.  This implementation handles them all identically.
  43  *
  44  * PUBLIC: int ex_next __P((SCR *, EXCMD *));
  45  */
  46 int
  47 ex_next(SCR *sp, EXCMD *cmdp)
  48 {
  49         ARGS **argv;
  50         FREF *frp;
  51         int noargs;
  52         char **ap;
  53         const CHAR_T *wp;
  54         size_t wlen;
  55         const char *np;
  56         size_t nlen;
  57
  58         /* Check for file to move to. */
  59         if (cmdp->argc == 0 && (sp->cargv == NULL || sp->cargv[1] == NULL)) {
  60                 msgq(sp, M_ERR, "111|No more files to edit");
  61                 return (1);
  62         }
  63
  64         if (F_ISSET(cmdp, E_NEWSCREEN)) {
  65                 /* By default, edit the next file in the old argument list. */
  66                 if (cmdp->argc == 0) {
  67                         CHAR2INT(sp, sp->cargv[1], strlen(sp->cargv[1]) + 1,
  68                                            wp, wlen);
  69                         if (argv_exp0(sp, cmdp, wp, wlen - 1))
  70                                 return (1);
  71                         return (ex_edit(sp, cmdp));
  72                 }
  73                 return (ex_N_next(sp, cmdp));
  74         }
  75
  76         /* Check modification. */
  77         if (file_m1(sp,
  78             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
  79                 return (1);
  80
  81         /* Any arguments are a replacement file list. */
  82         if (cmdp->argc) {
  83                 /* Free the current list. */
  84                 if (!F_ISSET(sp, SC_ARGNOFREE) && sp->argv != NULL) {
  85                         for (ap = sp->argv; *ap != NULL; ++ap)
  86                                 free(*ap);
  87                         free(sp->argv);
  88                 }
  89                 F_CLR(sp, SC_ARGNOFREE | SC_ARGRECOVER);
  90                 sp->cargv = NULL;
  91
  92                 /* Create a new list. */
  93                 CALLOC_RET(sp,
  94                     sp->argv, char **, cmdp->argc + 1, sizeof(char *));
  95                 for (ap = sp->argv,
  96                     argv = cmdp->argv; argv[0]->len != 0; ++ap, ++argv) {
  97                         INT2CHAR(sp, argv[0]->bp, argv[0]->len, np, nlen);
  98                         if ((*ap = v_strdup(sp, np, nlen)) == NULL)
  99                                 return (1);
 100                 }
 101                 *ap = NULL;
 102
 103                 /* Switch to the first file. */
 104                 sp->cargv = sp->argv;
 105                 if ((frp = file_add(sp, *sp->cargv)) == NULL)
 106                         return (1);
 107                 noargs = 0;
 108
 109                 /* Display a file count with the welcome message. */
 110                 F_SET(sp, SC_STATUS_CNT);
 111         } else {
 112                 if ((frp = file_add(sp, sp->cargv[1])) == NULL)
 113                         return (1);
 114                 if (F_ISSET(sp, SC_ARGRECOVER))
 115                         F_SET(frp, FR_RECOVER);
 116                 noargs = 1;
 117         }
 118
 119         if (file_init(sp, frp, NULL, FS_SETALT |
 120             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 121                 return (1);
 122         if (noargs)
 123                 ++sp->cargv;
 124
 125         F_SET(sp, SC_FSWITCH);
 126         return (0);
 127 }
 128
 129 /*
 130  * ex_N_next --
 131  *      New screen version of ex_next.
 132  */
 133 static int
 134 ex_N_next(SCR *sp, EXCMD *cmdp)
 135 {
 136         SCR *new;
 137         FREF *frp;
 138         const char *np;
 139         size_t nlen;
 140
 141         /* Get a new screen. */
 142         if (screen_init(sp->gp, sp, &new))
 143                 return (1);
 144         if (vs_split(sp, new, 0)) {
 145                 (void)screen_end(new);
 146                 return (1);
 147         }
 148
 149         /* Get a backing file. */
 150         INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len + 1, np, nlen);
 151         if ((frp = file_add(new, np)) == NULL ||
 152             file_init(new, frp, NULL,
 153             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0))) {
 154                 (void)vs_discard(new, NULL);
 155                 (void)screen_end(new);
 156                 return (1);
 157         }
 158
 159         /* The arguments are a replacement file list. */
 160         new->cargv = new->argv = ex_buildargv(sp, cmdp, NULL);
 161
 162         /* Display a file count with the welcome message. */
 163         F_SET(new, SC_STATUS_CNT);
 164
 165         /* Set up the switch. */
 166         sp->nextdisp = new;
 167         F_SET(sp, SC_SSWITCH);
 168
 169         return (0);
 170 }
 171
 172 /*
 173  * ex_prev -- :prev
 174  *      Edit the previous file.
 175  *
 176  * PUBLIC: int ex_prev __P((SCR *, EXCMD *));
 177  */
 178 int
 179 ex_prev(SCR *sp, EXCMD *cmdp)
 180 {
 181         FREF *frp;
 182         size_t wlen;
 183         const CHAR_T *wp;
 184
 185         if (sp->cargv == sp->argv) {
 186                 msgq(sp, M_ERR, "112|No previous files to edit");
 187                 return (1);
 188         }
 189
 190         if (F_ISSET(cmdp, E_NEWSCREEN)) {
 191                 CHAR2INT(sp, sp->cargv[-1], strlen(sp->cargv[-1]) + 1,
 192                                    wp, wlen);
 193                 if (argv_exp0(sp, cmdp, wp, wlen - 1))
 194                         return (1);
 195                 return (ex_edit(sp, cmdp));
 196         }
 197
 198         if (file_m1(sp,
 199             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
 200                 return (1);
 201
 202         if ((frp = file_add(sp, sp->cargv[-1])) == NULL)
 203                 return (1);
 204
 205         if (file_init(sp, frp, NULL, FS_SETALT |
 206             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 207                 return (1);
 208         --sp->cargv;
 209
 210         F_SET(sp, SC_FSWITCH);
 211         return (0);
 212 }
 213
 214 /*
 215  * ex_rew -- :rew
 216  *      Re-edit the list of files.
 217  *
 218  * !!!
 219  * Historic practice was that all files would start editing at the beginning
 220  * of the file.  We don't get this right because we may have multiple screens
 221  * and we can't clear the FR_CURSORSET bit for a single screen.  I don't see
 222  * anyone noticing, but if they do, we'll have to put information into the SCR
 223  * structure so we can keep track of it.
 224  *
 225  * PUBLIC: int ex_rew __P((SCR *, EXCMD *));
 226  */
 227 int
 228 ex_rew(SCR *sp, EXCMD *cmdp)
 229 {
 230         FREF *frp;
 231
 232         /*
 233          * !!!
 234          * Historic practice -- you can rewind to the current file.
 235          */
 236         if (sp->argv == NULL) {
 237                 msgq(sp, M_ERR, "113|No previous files to rewind");
 238                 return (1);
 239         }
 240
 241         if (file_m1(sp,
 242             FL_ISSET(cmdp->iflags, E_C_FORCE), FS_ALL | FS_POSSIBLE))
 243                 return (1);
 244
 245         /* Switch to the first one. */
 246         sp->cargv = sp->argv;
 247         if ((frp = file_add(sp, *sp->cargv)) == NULL)
 248                 return (1);
 249         if (file_init(sp, frp, NULL, FS_SETALT |
 250             (FL_ISSET(cmdp->iflags, E_C_FORCE) ? FS_FORCE : 0)))
 251                 return (1);
 252
 253         /* Switch and display a file count with the welcome message. */
 254         F_SET(sp, SC_FSWITCH | SC_STATUS_CNT);
 255
 256         return (0);
 257 }
 258
 259 /*
 260  * ex_args -- :args
 261  *      Display the list of files.
 262  *
 263  * PUBLIC: int ex_args __P((SCR *, EXCMD *));
 264  */
 265 int
 266 ex_args(SCR *sp, EXCMD *cmdp)
 267 {
 268         GS *gp;
 269         int cnt, sep;
 270         size_t col, len;
 271         char **ap;
 272
 273         if (sp->argv == NULL) {
 274                 (void)msgq(sp, M_ERR, "114|No file list to display");
 275                 return (0);
 276         }
 277
 278         gp = sp->gp;
 279         col = len = sep = 0;
 280         for (cnt = 1, ap = sp->argv; *ap != NULL; ++ap) {
 281                 col += len = strlen(*ap) + sep + (ap == sp->cargv ? 2 : 0);
 282                 if (col >= sp->cols - 1) {
 283                         col = len;
 284                         sep = 0;
 285                         (void)ex_puts(sp, "\n");
 286                 } else if (cnt != 1) {
 287                         sep = 1;
 288                         (void)ex_puts(sp, " ");
 289                 }
 290                 ++cnt;
 291
 292                 (void)ex_printf(sp, "%s%s%s", ap == sp->cargv ? "[" : "",
 293                     *ap, ap == sp->cargv ? "]" : "");
 294                 if (INTERRUPTED(sp))
 295                         break;
 296         }
 297         (void)ex_puts(sp, "\n");
 298         return (0);
 299 }
 300
 301 /*
 302  * ex_buildargv --
 303  *      Build a new file argument list.
 304  *
 305  * PUBLIC: char **ex_buildargv __P((SCR *, EXCMD *, char *));
 306  */
 307 char **
 308 ex_buildargv(SCR *sp, EXCMD *cmdp, char *name)
 309 {
 310         ARGS **argv;
 311         int argc;
 312         char **ap, **s_argv;
 313         const char *np;
 314         size_t nlen;
 315
 316         argc = cmdp == NULL ? 1 : cmdp->argc;
 317         CALLOC(sp, s_argv, char **, argc + 1, sizeof(char *));
 318         if ((ap = s_argv) == NULL)
 319                 return (NULL);
 320
 321         if (cmdp == NULL) {
 322                 if ((*ap = v_strdup(sp, name, strlen(name))) == NULL)
 323                         return (NULL);
 324                 ++ap;
 325         } else
 326                 for (argv = cmdp->argv; argv[0]->len != 0; ++ap, ++argv) {
 327                         INT2CHAR(sp, cmdp->argv[0]->bp, cmdp->argv[0]->len,
 328                                  np, nlen);
 329                         if ((*ap = v_strdup(sp, np, nlen)) == NULL)
 330                                 return (NULL);
 331                 }
 332         *ap = NULL;
 333         return (s_argv);
 334 }