libgfortran/io/inquire.c

   1 /* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
   2    Contributed by Andy Vaught
   3
   4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   5
   6 Libgfortran is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 In addition to the permissions in the GNU General Public License, the
  12 Free Software Foundation gives you unlimited permission to link the
  13 compiled version of this file into combinations with other programs,
  14 and to distribute those combinations without any restriction coming
  15 from the use of this file.  (The General Public License restrictions
  16 do apply in other respects; for example, they cover modification of
  17 the file, and distribution when not linked into a combine
  18 executable.)
  19
  20 Libgfortran is distributed in the hope that it will be useful,
  21 but WITHOUT ANY WARRANTY; without even the implied warranty of
  22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23 GNU General Public License for more details.
  24
  25 You should have received a copy of the GNU General Public License
  26 along with Libgfortran; see the file COPYING.  If not, write to
  27 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  28 Boston, MA 02110-1301, USA.  */
  29
  30
  31 /* Implement the non-IOLENGTH variant of the INQUIRY statement */
  32
  33 #include "io.h"
  34
  35
  36 static const char undefined[] = "UNDEFINED";
  37
  38
  39 /* inquire_via_unit()-- Inquiry via unit number.  The unit might not exist. */
  40
  41 static void
  42 inquire_via_unit (st_parameter_inquire *iqp, gfc_unit * u)
  43 {
  44   const char *p;
  45   GFC_INTEGER_4 cf = iqp->common.flags;
  46
  47   if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
  48     {
  49       *iqp->exist = (iqp->common.unit >= 0
  50                      && iqp->common.unit <= GFC_INTEGER_4_HUGE);
  51
  52       if ((cf & IOPARM_INQUIRE_HAS_FILE) == 0)
  53         {
  54           if (!(*iqp->exist))
  55             *iqp->common.iostat = LIBERROR_BAD_UNIT;
  56           *iqp->exist = *iqp->exist
  57                         && (*iqp->common.iostat != LIBERROR_BAD_UNIT);
  58         }
  59     }
  60
  61   if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
  62     *iqp->opened = (u != NULL);
  63
  64   if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
  65     *iqp->number = (u != NULL) ? u->unit_number : -1;
  66
  67   if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
  68     *iqp->named = (u != NULL && u->flags.status != STATUS_SCRATCH);
  69
  70   if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0
  71       && u != NULL && u->flags.status != STATUS_SCRATCH)
  72     fstrcpy (iqp->name, iqp->name_len, u->file, u->file_len);
  73
  74   if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
  75     {
  76       if (u == NULL)
  77         p = undefined;
  78       else
  79         switch (u->flags.access)
  80           {
  81           case ACCESS_SEQUENTIAL:
  82             p = "SEQUENTIAL";
  83             break;
  84           case ACCESS_DIRECT:
  85             p = "DIRECT";
  86             break;
  87           case ACCESS_STREAM:
  88             p = "STREAM";
  89             break;
  90           default:
  91             internal_error (&iqp->common, "inquire_via_unit(): Bad access");
  92           }
  93
  94       cf_strcpy (iqp->access, iqp->access_len, p);
  95     }
  96
  97   if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
  98     {
  99       if (u == NULL)
 100         p = inquire_sequential (NULL, 0);
 101       else
 102         switch (u->flags.access)
 103           {
 104           case ACCESS_DIRECT:
 105           case ACCESS_STREAM:
 106             p = "NO";
 107             break;
 108           case ACCESS_SEQUENTIAL:
 109             p = "YES";
 110             break;
 111           default:
 112             internal_error (&iqp->common, "inquire_via_unit(): Bad access");
 113           }
 114
 115       cf_strcpy (iqp->sequential, iqp->sequential_len, p);
 116     }
 117
 118   if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
 119     {
 120       if (u == NULL)
 121         p = inquire_direct (NULL, 0);
 122       else
 123         switch (u->flags.access)
 124           {
 125           case ACCESS_SEQUENTIAL:
 126           case ACCESS_STREAM:
 127             p = "NO";
 128             break;
 129           case ACCESS_DIRECT:
 130             p = "YES";
 131             break;
 132           default:
 133             internal_error (&iqp->common, "inquire_via_unit(): Bad access");
 134           }
 135
 136       cf_strcpy (iqp->direct, iqp->direct_len, p);
 137     }
 138
 139   if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
 140     {
 141       if (u == NULL)
 142         p = undefined;
 143       else
 144         switch (u->flags.form)
 145           {
 146           case FORM_FORMATTED:
 147             p = "FORMATTED";
 148             break;
 149           case FORM_UNFORMATTED:
 150             p = "UNFORMATTED";
 151             break;
 152           default:
 153             internal_error (&iqp->common, "inquire_via_unit(): Bad form");
 154           }
 155
 156       cf_strcpy (iqp->form, iqp->form_len, p);
 157     }
 158
 159   if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
 160     {
 161       if (u == NULL)
 162         p = inquire_formatted (NULL, 0);
 163       else
 164         switch (u->flags.form)
 165           {
 166           case FORM_FORMATTED:
 167             p = "YES";
 168             break;
 169           case FORM_UNFORMATTED:
 170             p = "NO";
 171             break;
 172           default:
 173             internal_error (&iqp->common, "inquire_via_unit(): Bad form");
 174           }
 175
 176       cf_strcpy (iqp->formatted, iqp->formatted_len, p);
 177     }
 178
 179   if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
 180     {
 181       if (u == NULL)
 182         p = inquire_unformatted (NULL, 0);
 183       else
 184         switch (u->flags.form)
 185           {
 186           case FORM_FORMATTED:
 187             p = "NO";
 188             break;
 189           case FORM_UNFORMATTED:
 190             p = "YES";
 191             break;
 192           default:
 193             internal_error (&iqp->common, "inquire_via_unit(): Bad form");
 194           }
 195
 196       cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
 197     }
 198
 199   if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
 200     *iqp->recl_out = (u != NULL) ? u->recl : 0;
 201
 202   if ((cf & IOPARM_INQUIRE_HAS_STRM_POS_OUT) != 0)
 203     *iqp->strm_pos_out = (u != NULL) ? u->strm_pos : 0;
 204
 205   if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
 206     {
 207       /* This only makes sense in the context of DIRECT access.  */
 208       if (u != NULL && u->flags.access == ACCESS_DIRECT)
 209         *iqp->nextrec = u->last_record + 1;
 210       else
 211         *iqp->nextrec = 0;
 212     }
 213
 214   if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
 215     {
 216       if (u == NULL)
 217         p = undefined;
 218       else
 219         switch (u->flags.blank)
 220           {
 221           case BLANK_NULL:
 222             p = "NULL";
 223             break;
 224           case BLANK_ZERO:
 225             p = "ZERO";
 226             break;
 227           default:
 228             internal_error (&iqp->common, "inquire_via_unit(): Bad blank");
 229           }
 230
 231       cf_strcpy (iqp->blank, iqp->blank_len, p);
 232     }
 233
 234   if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
 235     {
 236       if (u == NULL || u->flags.access == ACCESS_DIRECT)
 237         p = undefined;
 238       else
 239         switch (u->flags.position)
 240           {
 241              case POSITION_REWIND:
 242                p = "REWIND";
 243                break;
 244              case POSITION_APPEND:
 245                p = "APPEND";
 246                break;
 247              case POSITION_ASIS:
 248                p = "ASIS";
 249                break;
 250              default:
 251                /* if not direct access, it must be
 252                   either REWIND, APPEND, or ASIS.
 253                   ASIS seems to be the best default */
 254                p = "ASIS";
 255                break;
 256           }
 257       cf_strcpy (iqp->position, iqp->position_len, p);
 258     }
 259
 260   if ((cf & IOPARM_INQUIRE_HAS_ACTION) != 0)
 261     {
 262       if (u == NULL)
 263         p = undefined;
 264       else
 265         switch (u->flags.action)
 266           {
 267           case ACTION_READ:
 268             p = "READ";
 269             break;
 270           case ACTION_WRITE:
 271             p = "WRITE";
 272             break;
 273           case ACTION_READWRITE:
 274             p = "READWRITE";
 275             break;
 276           default:
 277             internal_error (&iqp->common, "inquire_via_unit(): Bad action");
 278           }
 279
 280       cf_strcpy (iqp->action, iqp->action_len, p);
 281     }
 282
 283   if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
 284     {
 285       p = (u == NULL) ? inquire_read (NULL, 0) :
 286         inquire_read (u->file, u->file_len);
 287
 288       cf_strcpy (iqp->read, iqp->read_len, p);
 289     }
 290
 291   if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
 292     {
 293       p = (u == NULL) ? inquire_write (NULL, 0) :
 294         inquire_write (u->file, u->file_len);
 295
 296       cf_strcpy (iqp->write, iqp->write_len, p);
 297     }
 298
 299   if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
 300     {
 301       p = (u == NULL) ? inquire_readwrite (NULL, 0) :
 302         inquire_readwrite (u->file, u->file_len);
 303
 304       cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
 305     }
 306
 307   if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
 308     {
 309       if (u == NULL || u->flags.form != FORM_FORMATTED)
 310         p = undefined;
 311       else
 312         switch (u->flags.delim)
 313           {
 314           case DELIM_NONE:
 315             p = "NONE";
 316             break;
 317           case DELIM_QUOTE:
 318             p = "QUOTE";
 319             break;
 320           case DELIM_APOSTROPHE:
 321             p = "APOSTROPHE";
 322             break;
 323           default:
 324             internal_error (&iqp->common, "inquire_via_unit(): Bad delim");
 325           }
 326
 327       cf_strcpy (iqp->delim, iqp->delim_len, p);
 328     }
 329
 330   if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
 331     {
 332       if (u == NULL || u->flags.form != FORM_FORMATTED)
 333         p = undefined;
 334       else
 335         switch (u->flags.pad)
 336           {
 337           case PAD_NO:
 338             p = "NO";
 339             break;
 340           case PAD_YES:
 341             p = "YES";
 342             break;
 343           default:
 344             internal_error (&iqp->common, "inquire_via_unit(): Bad pad");
 345           }
 346
 347       cf_strcpy (iqp->pad, iqp->pad_len, p);
 348     }
 349
 350   if ((cf & IOPARM_INQUIRE_HAS_CONVERT) != 0)
 351     {
 352       if (u == NULL)
 353         p = undefined;
 354       else
 355         switch (u->flags.convert)
 356           {
 357             /*  l8_to_l4_offset is 0 for little-endian, 1 for big-endian.  */
 358           case GFC_CONVERT_NATIVE:
 359             p = l8_to_l4_offset ? "BIG_ENDIAN" : "LITTLE_ENDIAN";
 360             break;
 361
 362           case GFC_CONVERT_SWAP:
 363             p = l8_to_l4_offset ? "LITTLE_ENDIAN" : "BIG_ENDIAN";
 364             break;
 365
 366           default:
 367             internal_error (&iqp->common, "inquire_via_unit(): Bad convert");
 368           }
 369
 370       cf_strcpy (iqp->convert, iqp->convert_len, p);
 371     }
 372 }
 373
 374
 375 /* inquire_via_filename()-- Inquiry via filename.  This subroutine is
 376  * only used if the filename is *not* connected to a unit number. */
 377
 378 static void
 379 inquire_via_filename (st_parameter_inquire *iqp)
 380 {
 381   const char *p;
 382   GFC_INTEGER_4 cf = iqp->common.flags;
 383
 384   if ((cf & IOPARM_INQUIRE_HAS_EXIST) != 0)
 385     *iqp->exist = file_exists (iqp->file, iqp->file_len);
 386
 387   if ((cf & IOPARM_INQUIRE_HAS_OPENED) != 0)
 388     *iqp->opened = 0;
 389
 390   if ((cf & IOPARM_INQUIRE_HAS_NUMBER) != 0)
 391     *iqp->number = -1;
 392
 393   if ((cf & IOPARM_INQUIRE_HAS_NAMED) != 0)
 394     *iqp->named = 1;
 395
 396   if ((cf & IOPARM_INQUIRE_HAS_NAME) != 0)
 397     fstrcpy (iqp->name, iqp->name_len, iqp->file, iqp->file_len);
 398
 399   if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
 400     cf_strcpy (iqp->access, iqp->access_len, undefined);
 401
 402   if ((cf & IOPARM_INQUIRE_HAS_SEQUENTIAL) != 0)
 403     {
 404       p = "UNKNOWN";
 405       cf_strcpy (iqp->sequential, iqp->sequential_len, p);
 406     }
 407
 408   if ((cf & IOPARM_INQUIRE_HAS_DIRECT) != 0)
 409     {
 410       p = "UNKNOWN";
 411       cf_strcpy (iqp->direct, iqp->direct_len, p);
 412     }
 413
 414   if ((cf & IOPARM_INQUIRE_HAS_FORM) != 0)
 415     cf_strcpy (iqp->form, iqp->form_len, undefined);
 416
 417   if ((cf & IOPARM_INQUIRE_HAS_FORMATTED) != 0)
 418     {
 419       p = "UNKNOWN";
 420       cf_strcpy (iqp->formatted, iqp->formatted_len, p);
 421     }
 422
 423   if ((cf & IOPARM_INQUIRE_HAS_UNFORMATTED) != 0)
 424     {
 425       p = "UNKNOWN";
 426       cf_strcpy (iqp->unformatted, iqp->unformatted_len, p);
 427     }
 428
 429   if ((cf & IOPARM_INQUIRE_HAS_RECL_OUT) != 0)
 430     *iqp->recl_out = 0;
 431
 432   if ((cf & IOPARM_INQUIRE_HAS_NEXTREC) != 0)
 433     *iqp->nextrec = 0;
 434
 435   if ((cf & IOPARM_INQUIRE_HAS_BLANK) != 0)
 436     cf_strcpy (iqp->blank, iqp->blank_len, undefined);
 437
 438   if ((cf & IOPARM_INQUIRE_HAS_POSITION) != 0)
 439     cf_strcpy (iqp->position, iqp->position_len, undefined);
 440
 441   if ((cf & IOPARM_INQUIRE_HAS_ACCESS) != 0)
 442     cf_strcpy (iqp->access, iqp->access_len, undefined);
 443
 444   if ((cf & IOPARM_INQUIRE_HAS_READ) != 0)
 445     {
 446       p = inquire_read (iqp->file, iqp->file_len);
 447       cf_strcpy (iqp->read, iqp->read_len, p);
 448     }
 449
 450   if ((cf & IOPARM_INQUIRE_HAS_WRITE) != 0)
 451     {
 452       p = inquire_write (iqp->file, iqp->file_len);
 453       cf_strcpy (iqp->write, iqp->write_len, p);
 454     }
 455
 456   if ((cf & IOPARM_INQUIRE_HAS_READWRITE) != 0)
 457     {
 458       p = inquire_read (iqp->file, iqp->file_len);
 459       cf_strcpy (iqp->readwrite, iqp->readwrite_len, p);
 460     }
 461
 462   if ((cf & IOPARM_INQUIRE_HAS_DELIM) != 0)
 463     cf_strcpy (iqp->delim, iqp->delim_len, undefined);
 464
 465   if ((cf & IOPARM_INQUIRE_HAS_PAD) != 0)
 466     cf_strcpy (iqp->pad, iqp->pad_len, undefined);
 467 }
 468
 469
 470 /* Library entry point for the INQUIRE statement (non-IOLENGTH
 471    form).  */
 472
 473 extern void st_inquire (st_parameter_inquire *);
 474 export_proto(st_inquire);
 475
 476 void
 477 st_inquire (st_parameter_inquire *iqp)
 478 {
 479   gfc_unit *u;
 480
 481   library_start (&iqp->common);
 482
 483   if ((iqp->common.flags & IOPARM_INQUIRE_HAS_FILE) == 0)
 484     {
 485       u = find_unit (iqp->common.unit);
 486       inquire_via_unit (iqp, u);
 487     }
 488   else
 489     {
 490       u = find_file (iqp->file, iqp->file_len);
 491       if (u == NULL)
 492         inquire_via_filename (iqp);
 493       else
 494         inquire_via_unit (iqp, u);
 495     }
 496   if (u != NULL)
 497     unlock_unit (u);
 498
 499   library_end ();
 500 }