libgfortran/io/io.h

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007
   2    Free Software Foundation, Inc.
   3    Contributed by Andy Vaught
   4
   5 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   6
   7 Libgfortran is free software; you can redistribute it and/or modify
   8 it under the terms of the GNU General Public License as published by
   9 the Free Software Foundation; either version 2, or (at your option)
  10 any later version.
  11
  12 Libgfortran is distributed in the hope that it will be useful,
  13 but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 GNU General Public License for more details.
  16
  17 You should have received a copy of the GNU General Public License
  18 along with Libgfortran; see the file COPYING.  If not, write to
  19 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 Boston, MA 02110-1301, USA.  */
  21
  22 /* As a special exception, if you link this library with other files,
  23    some of which are compiled with GCC, to produce an executable,
  24    this library does not by itself cause the resulting executable
  25    to be covered by the GNU General Public License.
  26    This exception does not however invalidate any other reasons why
  27    the executable file might be covered by the GNU General Public License.  */
  28
  29 #ifndef GFOR_IO_H
  30 #define GFOR_IO_H
  31
  32 /* IO library include.  */
  33
  34 #include "libgfortran.h"
  35
  36 #include <setjmp.h>
  37 #include <gthr.h>
  38
  39 /* Basic types used in data transfers.  */
  40
  41 typedef enum
  42 { BT_NULL, BT_INTEGER, BT_LOGICAL, BT_CHARACTER, BT_REAL,
  43   BT_COMPLEX
  44 }
  45 bt;
  46
  47
  48 struct st_parameter_dt;
  49
  50 typedef struct stream
  51 {
  52   char *(*alloc_w_at) (struct stream *, int *, gfc_offset);
  53   char *(*alloc_r_at) (struct stream *, int *, gfc_offset);
  54   try (*sfree) (struct stream *);
  55   try (*close) (struct stream *);
  56   try (*seek) (struct stream *, gfc_offset);
  57   try (*trunc) (struct stream *);
  58   int (*read) (struct stream *, void *, size_t *);
  59   int (*write) (struct stream *, const void *, size_t *);
  60   try (*set) (struct stream *, int, size_t);
  61 }
  62 stream;
  63
  64
  65 /* Macros for doing file I/O given a stream.  */
  66
  67 #define sfree(s) ((s)->sfree)(s)
  68 #define sclose(s) ((s)->close)(s)
  69
  70 #define salloc_r(s, len) ((s)->alloc_r_at)(s, len, -1)
  71 #define salloc_w(s, len) ((s)->alloc_w_at)(s, len, -1)
  72
  73 #define salloc_r_at(s, len, where) ((s)->alloc_r_at)(s, len, where)
  74 #define salloc_w_at(s, len, where) ((s)->alloc_w_at)(s, len, where)
  75
  76 #define sseek(s, pos) ((s)->seek)(s, pos)
  77 #define struncate(s) ((s)->trunc)(s)
  78 #define sread(s, buf, nbytes) ((s)->read)(s, buf, nbytes)
  79 #define swrite(s, buf, nbytes) ((s)->write)(s, buf, nbytes)
  80
  81 #define sset(s, c, n) ((s)->set)(s, c, n)
  82
  83 /* Macros for testing what kinds of I/O we are doing.  */
  84
  85 #define is_array_io(dtp) ((dtp)->internal_unit_desc)
  86
  87 #define is_internal_unit(dtp) ((dtp)->u.p.unit_is_internal)
  88
  89 #define is_stream_io(dtp) ((dtp)->u.p.current_unit->flags.access == ACCESS_STREAM)
  90
  91 /* The array_loop_spec contains the variables for the loops over index ranges
  92    that are encountered.  Since the variables can be negative, ssize_t
  93    is used.  */
  94
  95 typedef struct array_loop_spec
  96 {
  97   /* Index counter for this dimension.  */
  98   ssize_t idx;
  99
 100   /* Start for the index counter.  */
 101   ssize_t start;
 102
 103   /* End for the index counter.  */
 104   ssize_t end;
 105
 106   /* Step for the index counter.  */
 107   ssize_t step;
 108 }
 109 array_loop_spec;
 110
 111 /* Representation of a namelist object in libgfortran
 112
 113    Namelist Records
 114       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
 115      or
 116       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
 117
 118    The object can be a fully qualified, compound name for an intrinsic
 119    type, derived types or derived type components.  So, a substring
 120    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
 121    read. Hence full information about the structure of the object has
 122    to be available to list_read.c and write.
 123
 124    These requirements are met by the following data structures.
 125
 126    namelist_info type contains all the scalar information about the
 127    object and arrays of descriptor_dimension and array_loop_spec types for
 128    arrays.  */
 129
 130 typedef struct namelist_type
 131 {
 132
 133   /* Object type, stored as GFC_DTYPE_xxxx.  */
 134   bt type;
 135
 136   /* Object name.  */
 137   char * var_name;
 138
 139   /* Address for the start of the object's data.  */
 140   void * mem_pos;
 141
 142   /* Flag to show that a read is to be attempted for this node.  */
 143   int touched;
 144
 145   /* Length of intrinsic type in bytes.  */
 146   int len;
 147
 148   /* Rank of the object.  */
 149   int var_rank;
 150
 151   /* Overall size of the object in bytes.  */
 152   index_type size;
 153
 154   /* Length of character string.  */
 155   index_type string_length;
 156
 157   descriptor_dimension * dim;
 158   array_loop_spec * ls;
 159   struct namelist_type * next;
 160 }
 161 namelist_info;
 162
 163 /* Options for the OPEN statement.  */
 164
 165 typedef enum
 166 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 167   ACCESS_UNSPECIFIED
 168 }
 169 unit_access;
 170
 171 typedef enum
 172 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 173   ACTION_UNSPECIFIED
 174 }
 175 unit_action;
 176
 177 typedef enum
 178 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 179 unit_blank;
 180
 181 typedef enum
 182 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 183   DELIM_UNSPECIFIED
 184 }
 185 unit_delim;
 186
 187 typedef enum
 188 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 189 unit_form;
 190
 191 typedef enum
 192 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 193   POSITION_UNSPECIFIED
 194 }
 195 unit_position;
 196
 197 typedef enum
 198 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 199   STATUS_REPLACE, STATUS_UNSPECIFIED
 200 }
 201 unit_status;
 202
 203 typedef enum
 204 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 205 unit_pad;
 206
 207 typedef enum
 208 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 209 unit_advance;
 210
 211 typedef enum
 212 {READING, WRITING}
 213 unit_mode;
 214
 215 #define CHARACTER1(name) \
 216               char * name; \
 217               gfc_charlen_type name ## _len
 218 #define CHARACTER2(name) \
 219               gfc_charlen_type name ## _len; \
 220               char * name
 221
 222 typedef struct
 223 {
 224   st_parameter_common common;
 225   GFC_INTEGER_4 recl_in;
 226   CHARACTER2 (file);
 227   CHARACTER1 (status);
 228   CHARACTER2 (access);
 229   CHARACTER1 (form);
 230   CHARACTER2 (blank);
 231   CHARACTER1 (position);
 232   CHARACTER2 (action);
 233   CHARACTER1 (delim);
 234   CHARACTER2 (pad);
 235   CHARACTER1 (convert);
 236 }
 237 st_parameter_open;
 238
 239 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 240
 241 typedef struct
 242 {
 243   st_parameter_common common;
 244   CHARACTER1 (status);
 245 }
 246 st_parameter_close;
 247
 248 typedef struct
 249 {
 250   st_parameter_common common;
 251 }
 252 st_parameter_filepos;
 253
 254 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 255 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 256 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 257 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 258 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 259 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 260 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 261 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 262 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 263 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 264 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 265 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 266 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 267 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 268 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 269 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 270 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 271 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 272 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 273 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 274 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 275 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 276 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 277 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 278
 279 typedef struct
 280 {
 281   st_parameter_common common;
 282   GFC_INTEGER_4 *exist, *opened, *number, *named;
 283   GFC_INTEGER_4 *nextrec, *recl_out;
 284   GFC_IO_INT *strm_pos_out;
 285   CHARACTER1 (file);
 286   CHARACTER2 (access);
 287   CHARACTER1 (form);
 288   CHARACTER2 (blank);
 289   CHARACTER1 (position);
 290   CHARACTER2 (action);
 291   CHARACTER1 (delim);
 292   CHARACTER2 (pad);
 293   CHARACTER1 (name);
 294   CHARACTER2 (sequential);
 295   CHARACTER1 (direct);
 296   CHARACTER2 (formatted);
 297   CHARACTER1 (unformatted);
 298   CHARACTER2 (read);
 299   CHARACTER1 (write);
 300   CHARACTER2 (readwrite);
 301   CHARACTER1 (convert);
 302 }
 303 st_parameter_inquire;
 304
 305 struct gfc_unit;
 306 struct format_data;
 307
 308 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 309 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 310 #define IOPARM_DT_HAS_REC                       (1 << 9)
 311 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 312 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 313 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 314 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 315 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 316 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 317 /* Internal use bit.  */
 318 #define IOPARM_DT_IONML_SET                     (1 << 31)
 319
 320 typedef struct st_parameter_dt
 321 {
 322   st_parameter_common common;
 323   GFC_IO_INT rec;
 324   GFC_IO_INT *size, *iolength;
 325   gfc_array_char *internal_unit_desc;
 326   CHARACTER1 (format);
 327   CHARACTER2 (advance);
 328   CHARACTER1 (internal_unit);
 329   CHARACTER2 (namelist_name);
 330   /* Private part of the structure.  The compiler just needs
 331      to reserve enough space.  */
 332   union
 333     {
 334       struct
 335         {
 336           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 337                             size_t, size_t);
 338           struct gfc_unit *current_unit;
 339           /* Item number in a formatted data transfer.  Also used in namelist
 340                read_logical as an index into line_buffer.  */
 341           int item_count;
 342           unit_mode mode;
 343           unit_blank blank_status;
 344           enum {SIGN_S, SIGN_SS, SIGN_SP} sign_status;
 345           int scale_factor;
 346           int max_pos; /* Maximum righthand column written to.  */
 347           /* Number of skips + spaces to be done for T and X-editing.  */
 348           int skips;
 349           /* Number of spaces to be done for T and X-editing.  */
 350           int pending_spaces;
 351           /* Whether an EOR condition was encountered. Value is:
 352                0 if no EOR was encountered
 353                1 if an EOR was encountered due to a 1-byte marker (LF)
 354                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 355           int sf_seen_eor;
 356           unit_advance advance_status;
 357
 358           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 359           unsigned first_item : 1;
 360           unsigned seen_dollar : 1;
 361           unsigned eor_condition : 1;
 362           unsigned no_leading_blank : 1;
 363           unsigned char_flag : 1;
 364           unsigned input_complete : 1;
 365           unsigned at_eol : 1;
 366           unsigned comma_flag : 1;
 367           /* A namelist specific flag used in the list directed library
 368              to flag that calls are being made from namelist read (eg. to
 369              ignore comments or to treat '/' as a terminator)  */
 370           unsigned namelist_mode : 1;
 371           /* A namelist specific flag used in the list directed library
 372              to flag read errors and return, so that an attempt can be
 373              made to read a new object name.  */
 374           unsigned nml_read_error : 1;
 375           /* A sequential formatted read specific flag used to signal that a
 376              character string is being read so don't use commas to shorten a
 377              formatted field width.  */
 378           unsigned sf_read_comma : 1;
 379           /* A namelist specific flag used to enable reading input from
 380              line_buffer for logical reads.  */
 381           unsigned line_buffer_enabled : 1;
 382           /* An internal unit specific flag used to identify that the associated
 383              unit is internal.  */
 384           unsigned unit_is_internal : 1;
 385           /* An internal unit specific flag to signify an EOF condition for list
 386              directed read.  */
 387           unsigned at_eof : 1;
 388           /* 16 unused bits.  */
 389
 390           char last_char;
 391           char nml_delim;
 392
 393           int repeat_count;
 394           int saved_length;
 395           int saved_used;
 396           bt saved_type;
 397           char *saved_string;
 398           char *scratch;
 399           char *line_buffer;
 400           struct format_data *fmt;
 401           jmp_buf *eof_jump;
 402           namelist_info *ionml;
 403           /* A flag used to identify when a non-standard expanded namelist read
 404              has occurred.  */
 405           int expanded_read;
 406           /* Storage area for values except for strings.  Must be large
 407              enough to hold a complex value (two reals) of the largest
 408              kind.  */
 409           char value[32];
 410           gfc_offset size_used;
 411         } p;
 412       /* This pad size must be equal to the pad_size declared in
 413          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 414          must be smaller or equal to this array.  */
 415       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 416     } u;
 417 }
 418 st_parameter_dt;
 419
 420 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 421 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 422                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 423                                   ? 1 : -1];
 424
 425 #undef CHARACTER1
 426 #undef CHARACTER2
 427
 428 typedef struct
 429 {
 430   unit_access access;
 431   unit_action action;
 432   unit_blank blank;
 433   unit_delim delim;
 434   unit_form form;
 435   int is_notpadded;
 436   unit_position position;
 437   unit_status status;
 438   unit_pad pad;
 439   unit_convert convert;
 440   int has_recl;
 441 }
 442 unit_flags;
 443
 444
 445 typedef struct gfc_unit
 446 {
 447   int unit_number;
 448   stream *s;
 449
 450   /* Treap links.  */
 451   struct gfc_unit *left, *right;
 452   int priority;
 453
 454   int read_bad, current_record, saved_pos;
 455   enum
 456   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 457   endfile;
 458
 459   unit_mode mode;
 460   unit_flags flags;
 461
 462   /* recl                 -- Record length of the file.
 463      last_record          -- Last record number read or written
 464      maxrec               -- Maximum record number in a direct access file
 465      bytes_left           -- Bytes left in current record.
 466      strm_pos             -- Current position in file for STREAM I/O.
 467      recl_subrecord       -- Maximum length for subrecord.
 468      bytes_left_subrecord -- Bytes left in current subrecord.  */
 469   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 470     recl_subrecord, bytes_left_subrecord;
 471
 472   /* Set to 1 if we have read a subrecord.  */
 473
 474   int continued;
 475
 476   __gthread_mutex_t lock;
 477   /* Number of threads waiting to acquire this unit's lock.
 478      When non-zero, close_unit doesn't only removes the unit
 479      from the UNIT_ROOT tree, but doesn't free it and the
 480      last of the waiting threads will do that.
 481      This must be either atomically increased/decreased, or
 482      always guarded by UNIT_LOCK.  */
 483   int waiting;
 484   /* Flag set by close_unit if the unit as been closed.
 485      Must be manipulated under unit's lock.  */
 486   int closed;
 487
 488   /* For traversing arrays */
 489   array_loop_spec *ls;
 490   int rank;
 491
 492   int file_len;
 493   char *file;
 494 }
 495 gfc_unit;
 496
 497 /* Format tokens.  Only about half of these can be stored in the
 498    format nodes.  */
 499
 500 typedef enum
 501 {
 502   FMT_NONE = 0, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
 503   FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_T, FMT_TR, FMT_TL,
 504   FMT_LPAREN, FMT_RPAREN, FMT_X, FMT_S, FMT_SS, FMT_SP, FMT_STRING,
 505   FMT_BADSTRING, FMT_P, FMT_I, FMT_B, FMT_BN, FMT_BZ, FMT_O, FMT_Z, FMT_F,
 506   FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
 507 }
 508 format_token;
 509
 510
 511 /* Format nodes.  A format string is converted into a tree of these
 512    structures, which is traversed as part of a data transfer statement.  */
 513
 514 typedef struct fnode
 515 {
 516   format_token format;
 517   int repeat;
 518   struct fnode *next;
 519   char *source;
 520
 521   union
 522   {
 523     struct
 524     {
 525       int w, d, e;
 526     }
 527     real;
 528
 529     struct
 530     {
 531       int length;
 532       char *p;
 533     }
 534     string;
 535
 536     struct
 537     {
 538       int w, m;
 539     }
 540     integer;
 541
 542     int w;
 543     int k;
 544     int r;
 545     int n;
 546
 547     struct fnode *child;
 548   }
 549   u;
 550
 551   /* Members for traversing the tree during data transfer.  */
 552
 553   int count;
 554   struct fnode *current;
 555
 556 }
 557 fnode;
 558
 559
 560 /* unix.c */
 561
 562 extern int move_pos_offset (stream *, int);
 563 internal_proto(move_pos_offset);
 564
 565 extern int compare_files (stream *, stream *);
 566 internal_proto(compare_files);
 567
 568 extern stream *open_external (st_parameter_open *, unit_flags *);
 569 internal_proto(open_external);
 570
 571 extern stream *open_internal (char *, int);
 572 internal_proto(open_internal);
 573
 574 extern stream *input_stream (void);
 575 internal_proto(input_stream);
 576
 577 extern stream *output_stream (void);
 578 internal_proto(output_stream);
 579
 580 extern stream *error_stream (void);
 581 internal_proto(error_stream);
 582
 583 extern int compare_file_filename (gfc_unit *, const char *, int);
 584 internal_proto(compare_file_filename);
 585
 586 extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
 587 internal_proto(find_file);
 588
 589 extern int stream_at_bof (stream *);
 590 internal_proto(stream_at_bof);
 591
 592 extern int stream_at_eof (stream *);
 593 internal_proto(stream_at_eof);
 594
 595 extern int delete_file (gfc_unit *);
 596 internal_proto(delete_file);
 597
 598 extern int file_exists (const char *file, gfc_charlen_type file_len);
 599 internal_proto(file_exists);
 600
 601 extern const char *inquire_sequential (const char *, int);
 602 internal_proto(inquire_sequential);
 603
 604 extern const char *inquire_direct (const char *, int);
 605 internal_proto(inquire_direct);
 606
 607 extern const char *inquire_formatted (const char *, int);
 608 internal_proto(inquire_formatted);
 609
 610 extern const char *inquire_unformatted (const char *, int);
 611 internal_proto(inquire_unformatted);
 612
 613 extern const char *inquire_read (const char *, int);
 614 internal_proto(inquire_read);
 615
 616 extern const char *inquire_write (const char *, int);
 617 internal_proto(inquire_write);
 618
 619 extern const char *inquire_readwrite (const char *, int);
 620 internal_proto(inquire_readwrite);
 621
 622 extern gfc_offset file_length (stream *);
 623 internal_proto(file_length);
 624
 625 extern gfc_offset file_position (stream *);
 626 internal_proto(file_position);
 627
 628 extern int is_seekable (stream *);
 629 internal_proto(is_seekable);
 630
 631 extern int is_special (stream *);
 632 internal_proto(is_special);
 633
 634 extern int is_preconnected (stream *);
 635 internal_proto(is_preconnected);
 636
 637 extern void flush_if_preconnected (stream *);
 638 internal_proto(flush_if_preconnected);
 639
 640 extern void empty_internal_buffer(stream *);
 641 internal_proto(empty_internal_buffer);
 642
 643 extern try flush (stream *);
 644 internal_proto(flush);
 645
 646 extern int stream_isatty (stream *);
 647 internal_proto(stream_isatty);
 648
 649 extern char * stream_ttyname (stream *);
 650 internal_proto(stream_ttyname);
 651
 652 extern gfc_offset stream_offset (stream *s);
 653 internal_proto(stream_offset);
 654
 655 extern int unpack_filename (char *, const char *, int);
 656 internal_proto(unpack_filename);
 657
 658 /* unit.c */
 659
 660 /* Maximum file offset, computed at library initialization time.  */
 661 extern gfc_offset max_offset;
 662 internal_proto(max_offset);
 663
 664 /* Unit tree root.  */
 665 extern gfc_unit *unit_root;
 666 internal_proto(unit_root);
 667
 668 extern __gthread_mutex_t unit_lock;
 669 internal_proto(unit_lock);
 670
 671 extern int close_unit (gfc_unit *);
 672 internal_proto(close_unit);
 673
 674 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 675 internal_proto(get_internal_unit);
 676
 677 extern void free_internal_unit (st_parameter_dt *);
 678 internal_proto(free_internal_unit);
 679
 680 extern gfc_unit *find_unit (int);
 681 internal_proto(find_unit);
 682
 683 extern gfc_unit *find_or_create_unit (int);
 684 internal_proto(find_or_create_unit);
 685
 686 extern gfc_unit *get_unit (st_parameter_dt *, int);
 687 internal_proto(get_unit);
 688
 689 extern void unlock_unit (gfc_unit *);
 690 internal_proto(unlock_unit);
 691
 692 extern void update_position (gfc_unit *);
 693 internal_proto(update_position);
 694
 695 /* open.c */
 696
 697 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 698 internal_proto(new_unit);
 699
 700 /* format.c */
 701
 702 extern void parse_format (st_parameter_dt *);
 703 internal_proto(parse_format);
 704
 705 extern const fnode *next_format (st_parameter_dt *);
 706 internal_proto(next_format);
 707
 708 extern void unget_format (st_parameter_dt *, const fnode *);
 709 internal_proto(unget_format);
 710
 711 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 712 internal_proto(format_error);
 713
 714 extern void free_format_data (st_parameter_dt *);
 715 internal_proto(free_format_data);
 716
 717 /* transfer.c */
 718
 719 #define SCRATCH_SIZE 300
 720
 721 extern const char *type_name (bt);
 722 internal_proto(type_name);
 723
 724 extern void *read_block (st_parameter_dt *, int *);
 725 internal_proto(read_block);
 726
 727 extern char *read_sf (st_parameter_dt *, int *, int);
 728 internal_proto(read_sf);
 729
 730 extern void *write_block (st_parameter_dt *, int);
 731 internal_proto(write_block);
 732
 733 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *);
 734 internal_proto(next_array_record);
 735
 736 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *);
 737 internal_proto(init_loop_spec);
 738
 739 extern void next_record (st_parameter_dt *, int);
 740 internal_proto(next_record);
 741
 742 extern void reverse_memcpy (void *, const void *, size_t);
 743 internal_proto (reverse_memcpy);
 744
 745 /* read.c */
 746
 747 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 748 internal_proto(set_integer);
 749
 750 extern GFC_UINTEGER_LARGEST max_value (int, int);
 751 internal_proto(max_value);
 752
 753 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 754 internal_proto(convert_real);
 755
 756 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 757 internal_proto(read_a);
 758
 759 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 760 internal_proto(read_f);
 761
 762 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 763 internal_proto(read_l);
 764
 765 extern void read_x (st_parameter_dt *, int);
 766 internal_proto(read_x);
 767
 768 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 769 internal_proto(read_radix);
 770
 771 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 772 internal_proto(read_decimal);
 773
 774 /* list_read.c */
 775
 776 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 777                                  size_t);
 778 internal_proto(list_formatted_read);
 779
 780 extern void finish_list_read (st_parameter_dt *);
 781 internal_proto(finish_list_read);
 782
 783 extern void namelist_read (st_parameter_dt *);
 784 internal_proto(namelist_read);
 785
 786 extern void namelist_write (st_parameter_dt *);
 787 internal_proto(namelist_write);
 788
 789 /* write.c */
 790
 791 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 792 internal_proto(write_a);
 793
 794 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 795 internal_proto(write_b);
 796
 797 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 798 internal_proto(write_d);
 799
 800 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 801 internal_proto(write_e);
 802
 803 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 804 internal_proto(write_en);
 805
 806 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 807 internal_proto(write_es);
 808
 809 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 810 internal_proto(write_f);
 811
 812 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 813 internal_proto(write_i);
 814
 815 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 816 internal_proto(write_l);
 817
 818 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 819 internal_proto(write_o);
 820
 821 extern void write_x (st_parameter_dt *, int, int);
 822 internal_proto(write_x);
 823
 824 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 825 internal_proto(write_z);
 826
 827 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 828                                   size_t);
 829 internal_proto(list_formatted_write);
 830
 831 /* size_from_kind.c */
 832 extern size_t size_from_real_kind (int);
 833 internal_proto(size_from_real_kind);
 834
 835 extern size_t size_from_complex_kind (int);
 836 internal_proto(size_from_complex_kind);
 837
 838 /* lock.c */
 839 extern void free_ionml (st_parameter_dt *);
 840 internal_proto(free_ionml);
 841
 842 static inline void
 843 inc_waiting_locked (gfc_unit *u)
 844 {
 845 #ifdef HAVE_SYNC_FETCH_AND_ADD
 846   (void) __sync_fetch_and_add (&u->waiting, 1);
 847 #else
 848   u->waiting++;
 849 #endif
 850 }
 851
 852 static inline int
 853 predec_waiting_locked (gfc_unit *u)
 854 {
 855 #ifdef HAVE_SYNC_FETCH_AND_ADD
 856   return __sync_add_and_fetch (&u->waiting, -1);
 857 #else
 858   return --u->waiting;
 859 #endif
 860 }
 861
 862 static inline void
 863 dec_waiting_unlocked (gfc_unit *u)
 864 {
 865 #ifdef HAVE_SYNC_FETCH_AND_ADD
 866   (void) __sync_fetch_and_add (&u->waiting, -1);
 867 #else
 868   __gthread_mutex_lock (&unit_lock);
 869   u->waiting--;
 870   __gthread_mutex_unlock (&unit_lock);
 871 #endif
 872 }
 873
 874 #endif
 875