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 <setjmp.h>
  35 #include "libgfortran.h"
  36
  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 (*truncate) (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)->truncate)(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 /* The array_loop_spec contains the variables for the loops over index ranges
  84    that are encountered.  Since the variables can be negative, ssize_t
  85    is used.  */
  86
  87 typedef struct array_loop_spec
  88 {
  89   /* Index counter for this dimension.  */
  90   ssize_t idx;
  91
  92   /* Start for the index counter.  */
  93   ssize_t start;
  94
  95   /* End for the index counter.  */
  96   ssize_t end;
  97
  98   /* Step for the index counter.  */
  99   ssize_t step;
 100 }
 101 array_loop_spec;
 102
 103 /* Representation of a namelist object in libgfortran
 104
 105    Namelist Records
 106       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
 107      or
 108       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
 109
 110    The object can be a fully qualified, compound name for an intrinsic
 111    type, derived types or derived type components.  So, a substring
 112    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
 113    read. Hence full information about the structure of the object has
 114    to be available to list_read.c and write.
 115
 116    These requirements are met by the following data structures.
 117
 118    namelist_info type contains all the scalar information about the
 119    object and arrays of descriptor_dimension and array_loop_spec types for
 120    arrays.  */
 121
 122 typedef struct namelist_type
 123 {
 124
 125   /* Object type, stored as GFC_DTYPE_xxxx.  */
 126   bt type;
 127
 128   /* Object name.  */
 129   char * var_name;
 130
 131   /* Address for the start of the object's data.  */
 132   void * mem_pos;
 133
 134   /* Flag to show that a read is to be attempted for this node.  */
 135   int touched;
 136
 137   /* Length of intrinsic type in bytes.  */
 138   int len;
 139
 140   /* Rank of the object.  */
 141   int var_rank;
 142
 143   /* Overall size of the object in bytes.  */
 144   index_type size;
 145
 146   /* Length of character string.  */
 147   index_type string_length;
 148
 149   descriptor_dimension * dim;
 150   array_loop_spec * ls;
 151   struct namelist_type * next;
 152 }
 153 namelist_info;
 154
 155 /* Options for the OPEN statement.  */
 156
 157 typedef enum
 158 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 159   ACCESS_UNSPECIFIED
 160 }
 161 unit_access;
 162
 163 typedef enum
 164 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 165   ACTION_UNSPECIFIED
 166 }
 167 unit_action;
 168
 169 typedef enum
 170 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 171 unit_blank;
 172
 173 typedef enum
 174 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 175   DELIM_UNSPECIFIED
 176 }
 177 unit_delim;
 178
 179 typedef enum
 180 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 181 unit_form;
 182
 183 typedef enum
 184 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 185   POSITION_UNSPECIFIED
 186 }
 187 unit_position;
 188
 189 typedef enum
 190 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 191   STATUS_REPLACE, STATUS_UNSPECIFIED
 192 }
 193 unit_status;
 194
 195 typedef enum
 196 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 197 unit_pad;
 198
 199 typedef enum
 200 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 201 unit_advance;
 202
 203 typedef enum
 204 {READING, WRITING}
 205 unit_mode;
 206
 207 #define CHARACTER1(name) \
 208               char * name; \
 209               gfc_charlen_type name ## _len
 210 #define CHARACTER2(name) \
 211               gfc_charlen_type name ## _len; \
 212               char * name
 213
 214 typedef struct
 215 {
 216   st_parameter_common common;
 217   GFC_INTEGER_4 recl_in;
 218   CHARACTER2 (file);
 219   CHARACTER1 (status);
 220   CHARACTER2 (access);
 221   CHARACTER1 (form);
 222   CHARACTER2 (blank);
 223   CHARACTER1 (position);
 224   CHARACTER2 (action);
 225   CHARACTER1 (delim);
 226   CHARACTER2 (pad);
 227   CHARACTER1 (convert);
 228 }
 229 st_parameter_open;
 230
 231 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 232
 233 typedef struct
 234 {
 235   st_parameter_common common;
 236   CHARACTER1 (status);
 237 }
 238 st_parameter_close;
 239
 240 typedef struct
 241 {
 242   st_parameter_common common;
 243 }
 244 st_parameter_filepos;
 245
 246 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 247 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 248 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 249 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 250 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 251 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 252 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 253 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 254 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 255 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 256 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 257 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 258 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 259 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 260 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 261 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 262 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 263 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 264 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 265 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 266 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 267 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 268 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 269 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 270
 271 typedef struct
 272 {
 273   st_parameter_common common;
 274   GFC_INTEGER_4 *exist, *opened, *number, *named;
 275   GFC_INTEGER_4 *nextrec, *recl_out;
 276   GFC_IO_INT *strm_pos_out;
 277   CHARACTER1 (file);
 278   CHARACTER2 (access);
 279   CHARACTER1 (form);
 280   CHARACTER2 (blank);
 281   CHARACTER1 (position);
 282   CHARACTER2 (action);
 283   CHARACTER1 (delim);
 284   CHARACTER2 (pad);
 285   CHARACTER1 (name);
 286   CHARACTER2 (sequential);
 287   CHARACTER1 (direct);
 288   CHARACTER2 (formatted);
 289   CHARACTER1 (unformatted);
 290   CHARACTER2 (read);
 291   CHARACTER1 (write);
 292   CHARACTER2 (readwrite);
 293   CHARACTER1 (convert);
 294 }
 295 st_parameter_inquire;
 296
 297 struct gfc_unit;
 298 struct format_data;
 299
 300 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 301 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 302 #define IOPARM_DT_HAS_REC                       (1 << 9)
 303 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 304 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 305 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 306 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 307 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 308 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 309 /* Internal use bit.  */
 310 #define IOPARM_DT_IONML_SET                     (1 << 31)
 311
 312 typedef struct st_parameter_dt
 313 {
 314   st_parameter_common common;
 315   GFC_IO_INT rec;
 316   GFC_IO_INT *size, *iolength;
 317   gfc_array_char *internal_unit_desc;
 318   CHARACTER1 (format);
 319   CHARACTER2 (advance);
 320   CHARACTER1 (internal_unit);
 321   CHARACTER2 (namelist_name);
 322   /* Private part of the structure.  The compiler just needs
 323      to reserve enough space.  */
 324   union
 325     {
 326       struct
 327         {
 328           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 329                             size_t, size_t);
 330           struct gfc_unit *current_unit;
 331           /* Item number in a formatted data transfer.  Also used in namelist
 332                read_logical as an index into line_buffer.  */
 333           int item_count;
 334           unit_mode mode;
 335           unit_blank blank_status;
 336           enum {SIGN_S, SIGN_SS, SIGN_SP} sign_status;
 337           int scale_factor;
 338           int max_pos; /* Maximum righthand column written to.  */
 339           /* Number of skips + spaces to be done for T and X-editing.  */
 340           int skips;
 341           /* Number of spaces to be done for T and X-editing.  */
 342           int pending_spaces;
 343           /* Whether an EOR condition was encountered. Value is:
 344                0 if no EOR was encountered
 345                1 if an EOR was encountered due to a 1-byte marker (LF)
 346                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 347           int sf_seen_eor;
 348           unit_advance advance_status;
 349
 350           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 351           unsigned first_item : 1;
 352           unsigned seen_dollar : 1;
 353           unsigned eor_condition : 1;
 354           unsigned no_leading_blank : 1;
 355           unsigned char_flag : 1;
 356           unsigned input_complete : 1;
 357           unsigned at_eol : 1;
 358           unsigned comma_flag : 1;
 359           /* A namelist specific flag used in the list directed library
 360              to flag that calls are being made from namelist read (eg. to
 361              ignore comments or to treat '/' as a terminator)  */
 362           unsigned namelist_mode : 1;
 363           /* A namelist specific flag used in the list directed library
 364              to flag read errors and return, so that an attempt can be
 365              made to read a new object name.  */
 366           unsigned nml_read_error : 1;
 367           /* A sequential formatted read specific flag used to signal that a
 368              character string is being read so don't use commas to shorten a
 369              formatted field width.  */
 370           unsigned sf_read_comma : 1;
 371           /* A namelist specific flag used to enable reading input from
 372              line_buffer for logical reads.  */
 373           unsigned line_buffer_enabled : 1;
 374           /* An internal unit specific flag used to identify that the associated
 375              unit is internal.  */
 376           unsigned unit_is_internal : 1;
 377           /* An internal unit specific flag to signify an EOF condition for list
 378              directed read.  */
 379           unsigned at_eof : 1;
 380           /* 16 unused bits.  */
 381
 382           char last_char;
 383           char nml_delim;
 384
 385           int repeat_count;
 386           int saved_length;
 387           int saved_used;
 388           bt saved_type;
 389           char *saved_string;
 390           char *scratch;
 391           char *line_buffer;
 392           struct format_data *fmt;
 393           jmp_buf *eof_jump;
 394           namelist_info *ionml;
 395           /* A flag used to identify when a non-standard expanded namelist read
 396              has occurred.  */
 397           int expanded_read;
 398           /* Storage area for values except for strings.  Must be large
 399              enough to hold a complex value (two reals) of the largest
 400              kind.  */
 401           char value[32];
 402           gfc_offset size_used;
 403         } p;
 404       /* This pad size must be equal to the pad_size declared in
 405          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 406          must be smaller or equal to this array.  */
 407       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 408     } u;
 409 }
 410 st_parameter_dt;
 411
 412 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 413 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 414                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 415                                   ? 1 : -1];
 416
 417 #undef CHARACTER1
 418 #undef CHARACTER2
 419
 420 typedef struct
 421 {
 422   unit_access access;
 423   unit_action action;
 424   unit_blank blank;
 425   unit_delim delim;
 426   unit_form form;
 427   int is_notpadded;
 428   unit_position position;
 429   unit_status status;
 430   unit_pad pad;
 431   unit_convert convert;
 432   int has_recl;
 433 }
 434 unit_flags;
 435
 436
 437 typedef struct gfc_unit
 438 {
 439   int unit_number;
 440   stream *s;
 441
 442   /* Treap links.  */
 443   struct gfc_unit *left, *right;
 444   int priority;
 445
 446   int read_bad, current_record, saved_pos;
 447   enum
 448   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 449   endfile;
 450
 451   unit_mode mode;
 452   unit_flags flags;
 453
 454   /* recl                 -- Record length of the file.
 455      last_record          -- Last record number read or written
 456      maxrec               -- Maximum record number in a direct access file
 457      bytes_left           -- Bytes left in current record.
 458      strm_pos             -- Current position in file for STREAM I/O.
 459      recl_subrecord       -- Maximum length for subrecord.
 460      bytes_left_subrecord -- Bytes left in current subrecord.  */
 461   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 462     recl_subrecord, bytes_left_subrecord;
 463
 464   /* Set to 1 if we have read a subrecord.  */
 465
 466   int continued;
 467
 468   __gthread_mutex_t lock;
 469   /* Number of threads waiting to acquire this unit's lock.
 470      When non-zero, close_unit doesn't only removes the unit
 471      from the UNIT_ROOT tree, but doesn't free it and the
 472      last of the waiting threads will do that.
 473      This must be either atomically increased/decreased, or
 474      always guarded by UNIT_LOCK.  */
 475   int waiting;
 476   /* Flag set by close_unit if the unit as been closed.
 477      Must be manipulated under unit's lock.  */
 478   int closed;
 479
 480   /* For traversing arrays */
 481   array_loop_spec *ls;
 482   int rank;
 483
 484   int file_len;
 485   char *file;
 486 }
 487 gfc_unit;
 488
 489 /* Format tokens.  Only about half of these can be stored in the
 490    format nodes.  */
 491
 492 typedef enum
 493 {
 494   FMT_NONE = 0, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
 495   FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_T, FMT_TR, FMT_TL,
 496   FMT_LPAREN, FMT_RPAREN, FMT_X, FMT_S, FMT_SS, FMT_SP, FMT_STRING,
 497   FMT_BADSTRING, FMT_P, FMT_I, FMT_B, FMT_BN, FMT_BZ, FMT_O, FMT_Z, FMT_F,
 498   FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
 499 }
 500 format_token;
 501
 502
 503 /* Format nodes.  A format string is converted into a tree of these
 504    structures, which is traversed as part of a data transfer statement.  */
 505
 506 typedef struct fnode
 507 {
 508   format_token format;
 509   int repeat;
 510   struct fnode *next;
 511   char *source;
 512
 513   union
 514   {
 515     struct
 516     {
 517       int w, d, e;
 518     }
 519     real;
 520
 521     struct
 522     {
 523       int length;
 524       char *p;
 525     }
 526     string;
 527
 528     struct
 529     {
 530       int w, m;
 531     }
 532     integer;
 533
 534     int w;
 535     int k;
 536     int r;
 537     int n;
 538
 539     struct fnode *child;
 540   }
 541   u;
 542
 543   /* Members for traversing the tree during data transfer.  */
 544
 545   int count;
 546   struct fnode *current;
 547
 548 }
 549 fnode;
 550
 551
 552 /* unix.c */
 553
 554 extern int move_pos_offset (stream *, int);
 555 internal_proto(move_pos_offset);
 556
 557 extern int compare_files (stream *, stream *);
 558 internal_proto(compare_files);
 559
 560 extern stream *open_external (st_parameter_open *, unit_flags *);
 561 internal_proto(open_external);
 562
 563 extern stream *open_internal (char *, int);
 564 internal_proto(open_internal);
 565
 566 extern stream *input_stream (void);
 567 internal_proto(input_stream);
 568
 569 extern stream *output_stream (void);
 570 internal_proto(output_stream);
 571
 572 extern stream *error_stream (void);
 573 internal_proto(error_stream);
 574
 575 extern int compare_file_filename (gfc_unit *, const char *, int);
 576 internal_proto(compare_file_filename);
 577
 578 extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
 579 internal_proto(find_file);
 580
 581 extern void flush_all_units (void);
 582 internal_proto(flush_all_units);
 583
 584 extern int stream_at_bof (stream *);
 585 internal_proto(stream_at_bof);
 586
 587 extern int stream_at_eof (stream *);
 588 internal_proto(stream_at_eof);
 589
 590 extern int delete_file (gfc_unit *);
 591 internal_proto(delete_file);
 592
 593 extern int file_exists (const char *file, gfc_charlen_type file_len);
 594 internal_proto(file_exists);
 595
 596 extern const char *inquire_sequential (const char *, int);
 597 internal_proto(inquire_sequential);
 598
 599 extern const char *inquire_direct (const char *, int);
 600 internal_proto(inquire_direct);
 601
 602 extern const char *inquire_formatted (const char *, int);
 603 internal_proto(inquire_formatted);
 604
 605 extern const char *inquire_unformatted (const char *, int);
 606 internal_proto(inquire_unformatted);
 607
 608 extern const char *inquire_read (const char *, int);
 609 internal_proto(inquire_read);
 610
 611 extern const char *inquire_write (const char *, int);
 612 internal_proto(inquire_write);
 613
 614 extern const char *inquire_readwrite (const char *, int);
 615 internal_proto(inquire_readwrite);
 616
 617 extern gfc_offset file_length (stream *);
 618 internal_proto(file_length);
 619
 620 extern gfc_offset file_position (stream *);
 621 internal_proto(file_position);
 622
 623 extern int is_seekable (stream *);
 624 internal_proto(is_seekable);
 625
 626 extern int is_special (stream *);
 627 internal_proto(is_special);
 628
 629 extern int is_preconnected (stream *);
 630 internal_proto(is_preconnected);
 631
 632 extern void flush_if_preconnected (stream *);
 633 internal_proto(flush_if_preconnected);
 634
 635 extern void empty_internal_buffer(stream *);
 636 internal_proto(empty_internal_buffer);
 637
 638 extern try flush (stream *);
 639 internal_proto(flush);
 640
 641 extern int stream_isatty (stream *);
 642 internal_proto(stream_isatty);
 643
 644 extern char * stream_ttyname (stream *);
 645 internal_proto(stream_ttyname);
 646
 647 extern gfc_offset stream_offset (stream *s);
 648 internal_proto(stream_offset);
 649
 650 extern int unpack_filename (char *, const char *, int);
 651 internal_proto(unpack_filename);
 652
 653 /* unit.c */
 654
 655 /* Maximum file offset, computed at library initialization time.  */
 656 extern gfc_offset max_offset;
 657 internal_proto(max_offset);
 658
 659 /* Unit tree root.  */
 660 extern gfc_unit *unit_root;
 661 internal_proto(unit_root);
 662
 663 extern __gthread_mutex_t unit_lock;
 664 internal_proto(unit_lock);
 665
 666 extern int close_unit (gfc_unit *);
 667 internal_proto(close_unit);
 668
 669 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 670 internal_proto(get_internal_unit);
 671
 672 extern void free_internal_unit (st_parameter_dt *);
 673 internal_proto(free_internal_unit);
 674
 675 extern int is_internal_unit (st_parameter_dt *);
 676 internal_proto(is_internal_unit);
 677
 678 extern int is_array_io (st_parameter_dt *);
 679 internal_proto(is_array_io);
 680
 681 extern int is_stream_io (st_parameter_dt *);
 682 internal_proto(is_stream_io);
 683
 684 extern gfc_unit *find_unit (int);
 685 internal_proto(find_unit);
 686
 687 extern gfc_unit *find_or_create_unit (int);
 688 internal_proto(find_or_create_unit);
 689
 690 extern gfc_unit *get_unit (st_parameter_dt *, int);
 691 internal_proto(get_unit);
 692
 693 extern void unlock_unit (gfc_unit *);
 694 internal_proto(unlock_unit);
 695
 696 /* open.c */
 697
 698 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 699 internal_proto(new_unit);
 700
 701 /* format.c */
 702
 703 extern void parse_format (st_parameter_dt *);
 704 internal_proto(parse_format);
 705
 706 extern const fnode *next_format (st_parameter_dt *);
 707 internal_proto(next_format);
 708
 709 extern void unget_format (st_parameter_dt *, const fnode *);
 710 internal_proto(unget_format);
 711
 712 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 713 internal_proto(format_error);
 714
 715 extern void free_format_data (st_parameter_dt *);
 716 internal_proto(free_format_data);
 717
 718 /* transfer.c */
 719
 720 #define SCRATCH_SIZE 300
 721
 722 extern const char *type_name (bt);
 723 internal_proto(type_name);
 724
 725 extern void *read_block (st_parameter_dt *, int *);
 726 internal_proto(read_block);
 727
 728 extern char *read_sf (st_parameter_dt *, int *, int);
 729 internal_proto(read_sf);
 730
 731 extern void *write_block (st_parameter_dt *, int);
 732 internal_proto(write_block);
 733
 734 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *);
 735 internal_proto(next_array_record);
 736
 737 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *);
 738 internal_proto(init_loop_spec);
 739
 740 extern void next_record (st_parameter_dt *, int);
 741 internal_proto(next_record);
 742
 743 extern void reverse_memcpy (void *, const void *, size_t);
 744 internal_proto (reverse_memcpy);
 745
 746 /* read.c */
 747
 748 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 749 internal_proto(set_integer);
 750
 751 extern GFC_UINTEGER_LARGEST max_value (int, int);
 752 internal_proto(max_value);
 753
 754 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 755 internal_proto(convert_real);
 756
 757 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 758 internal_proto(read_a);
 759
 760 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 761 internal_proto(read_f);
 762
 763 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 764 internal_proto(read_l);
 765
 766 extern void read_x (st_parameter_dt *, int);
 767 internal_proto(read_x);
 768
 769 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 770 internal_proto(read_radix);
 771
 772 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 773 internal_proto(read_decimal);
 774
 775 /* list_read.c */
 776
 777 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 778                                  size_t);
 779 internal_proto(list_formatted_read);
 780
 781 extern void finish_list_read (st_parameter_dt *);
 782 internal_proto(finish_list_read);
 783
 784 extern void namelist_read (st_parameter_dt *);
 785 internal_proto(namelist_read);
 786
 787 extern void namelist_write (st_parameter_dt *);
 788 internal_proto(namelist_write);
 789
 790 /* write.c */
 791
 792 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 793 internal_proto(write_a);
 794
 795 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 796 internal_proto(write_b);
 797
 798 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 799 internal_proto(write_d);
 800
 801 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 802 internal_proto(write_e);
 803
 804 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 805 internal_proto(write_en);
 806
 807 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 808 internal_proto(write_es);
 809
 810 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 811 internal_proto(write_f);
 812
 813 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 814 internal_proto(write_i);
 815
 816 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 817 internal_proto(write_l);
 818
 819 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 820 internal_proto(write_o);
 821
 822 extern void write_x (st_parameter_dt *, int, int);
 823 internal_proto(write_x);
 824
 825 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 826 internal_proto(write_z);
 827
 828 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 829                                   size_t);
 830 internal_proto(list_formatted_write);
 831
 832 /* size_from_kind.c */
 833 extern size_t size_from_real_kind (int);
 834 internal_proto(size_from_real_kind);
 835
 836 extern size_t size_from_complex_kind (int);
 837 internal_proto(size_from_complex_kind);
 838
 839 /* lock.c */
 840 extern void free_ionml (st_parameter_dt *);
 841 internal_proto(free_ionml);
 842
 843 static inline void
 844 inc_waiting_locked (gfc_unit *u)
 845 {
 846 #ifdef HAVE_SYNC_FETCH_AND_ADD
 847   (void) __sync_fetch_and_add (&u->waiting, 1);
 848 #else
 849   u->waiting++;
 850 #endif
 851 }
 852
 853 static inline int
 854 predec_waiting_locked (gfc_unit *u)
 855 {
 856 #ifdef HAVE_SYNC_FETCH_AND_ADD
 857   return __sync_add_and_fetch (&u->waiting, -1);
 858 #else
 859   return --u->waiting;
 860 #endif
 861 }
 862
 863 static inline void
 864 dec_waiting_unlocked (gfc_unit *u)
 865 {
 866 #ifdef HAVE_SYNC_FETCH_AND_ADD
 867   (void) __sync_fetch_and_add (&u->waiting, -1);
 868 #else
 869   __gthread_mutex_lock (&unit_lock);
 870   u->waiting--;
 871   __gthread_mutex_unlock (&unit_lock);
 872 #endif
 873 }
 874
 875 #endif
 876