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