libgfortran/io/io.h

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
   2    Free Software Foundation, Inc.
   3    Contributed by Andy Vaught
   4    F2003 I/O support contributed by Jerry DeLisle
   5
   6 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   7
   8 Libgfortran is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 3, or (at your option)
  11 any later version.
  12
  13 Libgfortran is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 Under Section 7 of GPL version 3, you are granted additional
  19 permissions described in the GCC Runtime Library Exception, version
  20 3.1, as published by the Free Software Foundation.
  21
  22 You should have received a copy of the GNU General Public License and
  23 a copy of the GCC Runtime Library Exception along with this program;
  24 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  25 <http://www.gnu.org/licenses/>.  */
  26
  27 #ifndef GFOR_IO_H
  28 #define GFOR_IO_H
  29
  30 /* IO library include.  */
  31
  32 #include "libgfortran.h"
  33
  34 #include <setjmp.h>
  35 #include <gthr.h>
  36
  37 /* Basic types used in data transfers.  */
  38
  39 typedef enum
  40 { BT_NULL, BT_INTEGER, BT_LOGICAL, BT_CHARACTER, BT_REAL,
  41   BT_COMPLEX
  42 }
  43 bt;
  44
  45 /* Forward declarations.  */
  46 struct st_parameter_dt;
  47 typedef struct stream stream;
  48 struct fbuf;
  49 struct format_data;
  50 typedef struct fnode fnode;
  51 struct gfc_unit;
  52
  53
  54 /* Macros for testing what kinds of I/O we are doing.  */
  55
  56 #define is_array_io(dtp) ((dtp)->internal_unit_desc)
  57
  58 #define is_internal_unit(dtp) ((dtp)->u.p.unit_is_internal)
  59
  60 #define is_stream_io(dtp) ((dtp)->u.p.current_unit->flags.access == ACCESS_STREAM)
  61
  62 /* The array_loop_spec contains the variables for the loops over index ranges
  63    that are encountered.  Since the variables can be negative, ssize_t
  64    is used.  */
  65
  66 typedef struct array_loop_spec
  67 {
  68   /* Index counter for this dimension.  */
  69   ssize_t idx;
  70
  71   /* Start for the index counter.  */
  72   ssize_t start;
  73
  74   /* End for the index counter.  */
  75   ssize_t end;
  76
  77   /* Step for the index counter.  */
  78   ssize_t step;
  79 }
  80 array_loop_spec;
  81
  82 /* A stucture to build a hash table for format data.  */
  83
  84 #define FORMAT_HASH_SIZE 16
  85
  86 typedef struct format_hash_entry
  87 {
  88   char *key;
  89   gfc_charlen_type key_len;
  90   struct format_data *hashed_fmt;
  91 }
  92 format_hash_entry;
  93
  94 /* Representation of a namelist object in libgfortran
  95
  96    Namelist Records
  97       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
  98      or
  99       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
 100
 101    The object can be a fully qualified, compound name for an intrinsic
 102    type, derived types or derived type components.  So, a substring
 103    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
 104    read. Hence full information about the structure of the object has
 105    to be available to list_read.c and write.
 106
 107    These requirements are met by the following data structures.
 108
 109    namelist_info type contains all the scalar information about the
 110    object and arrays of descriptor_dimension and array_loop_spec types for
 111    arrays.  */
 112
 113 typedef struct namelist_type
 114 {
 115   /* Object type, stored as GFC_DTYPE_xxxx.  */
 116   dtype type;
 117
 118   /* Object name.  */
 119   char * var_name;
 120
 121   /* Address for the start of the object's data.  */
 122   void * mem_pos;
 123
 124   /* Flag to show that a read is to be attempted for this node.  */
 125   int touched;
 126
 127   /* Length of intrinsic type in bytes.  */
 128   int len;
 129
 130   /* Rank of the object.  */
 131   int var_rank;
 132
 133   /* Overall size of the object in bytes.  */
 134   index_type size;
 135
 136   /* Length of character string.  */
 137   index_type string_length;
 138
 139   descriptor_dimension * dim;
 140   array_loop_spec * ls;
 141   struct namelist_type * next;
 142 }
 143 namelist_info;
 144
 145 /* Options for the OPEN statement.  */
 146
 147 typedef enum
 148 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 149   ACCESS_UNSPECIFIED
 150 }
 151 unit_access;
 152
 153 typedef enum
 154 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 155   ACTION_UNSPECIFIED
 156 }
 157 unit_action;
 158
 159 typedef enum
 160 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 161 unit_blank;
 162
 163 typedef enum
 164 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 165   DELIM_UNSPECIFIED
 166 }
 167 unit_delim;
 168
 169 typedef enum
 170 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 171 unit_form;
 172
 173 typedef enum
 174 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 175   POSITION_UNSPECIFIED
 176 }
 177 unit_position;
 178
 179 typedef enum
 180 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 181   STATUS_REPLACE, STATUS_UNSPECIFIED
 182 }
 183 unit_status;
 184
 185 typedef enum
 186 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 187 unit_pad;
 188
 189 typedef enum
 190 { DECIMAL_POINT, DECIMAL_COMMA, DECIMAL_UNSPECIFIED }
 191 unit_decimal;
 192
 193 typedef enum
 194 { ENCODING_UTF8, ENCODING_DEFAULT, ENCODING_UNSPECIFIED }
 195 unit_encoding;
 196
 197 typedef enum
 198 { ROUND_UP, ROUND_DOWN, ROUND_ZERO, ROUND_NEAREST, ROUND_COMPATIBLE,
 199   ROUND_PROCDEFINED, ROUND_UNSPECIFIED }
 200 unit_round;
 201
 202 /* NOTE: unit_sign must correspond with the sign_status enumerator in
 203    st_parameter_dt to not break the ABI.  */
 204 typedef enum
 205 { SIGN_PROCDEFINED, SIGN_SUPPRESS, SIGN_PLUS, SIGN_UNSPECIFIED }
 206 unit_sign;
 207
 208 typedef enum
 209 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 210 unit_advance;
 211
 212 typedef enum
 213 {READING, WRITING}
 214 unit_mode;
 215
 216 typedef enum
 217 { ASYNC_YES, ASYNC_NO, ASYNC_UNSPECIFIED }
 218 unit_async;
 219
 220 typedef enum
 221 { SIGN_S, SIGN_SS, SIGN_SP }
 222 unit_sign_s;
 223
 224 #define CHARACTER1(name) \
 225               char * name; \
 226               gfc_charlen_type name ## _len
 227 #define CHARACTER2(name) \
 228               gfc_charlen_type name ## _len; \
 229               char * name
 230
 231 typedef struct
 232 {
 233   st_parameter_common common;
 234   GFC_INTEGER_4 recl_in;
 235   CHARACTER2 (file);
 236   CHARACTER1 (status);
 237   CHARACTER2 (access);
 238   CHARACTER1 (form);
 239   CHARACTER2 (blank);
 240   CHARACTER1 (position);
 241   CHARACTER2 (action);
 242   CHARACTER1 (delim);
 243   CHARACTER2 (pad);
 244   CHARACTER1 (convert);
 245   CHARACTER2 (decimal);
 246   CHARACTER1 (encoding);
 247   CHARACTER2 (round);
 248   CHARACTER1 (sign);
 249   CHARACTER2 (asynchronous);
 250   GFC_INTEGER_4 *newunit;
 251 }
 252 st_parameter_open;
 253
 254 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 255
 256 typedef struct
 257 {
 258   st_parameter_common common;
 259   CHARACTER1 (status);
 260 }
 261 st_parameter_close;
 262
 263 typedef struct
 264 {
 265   st_parameter_common common;
 266 }
 267 st_parameter_filepos;
 268
 269 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 270 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 271 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 272 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 273 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 274 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 275 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 276 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 277 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 278 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 279 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 280 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 281 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 282 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 283 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 284 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 285 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 286 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 287 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 288 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 289 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 290 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 291 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 292 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 293 #define IOPARM_INQUIRE_HAS_FLAGS2       (1 << 31)
 294
 295 #define IOPARM_INQUIRE_HAS_ASYNCHRONOUS (1 << 0)
 296 #define IOPARM_INQUIRE_HAS_DECIMAL      (1 << 1)
 297 #define IOPARM_INQUIRE_HAS_ENCODING     (1 << 2)
 298 #define IOPARM_INQUIRE_HAS_ROUND        (1 << 3)
 299 #define IOPARM_INQUIRE_HAS_SIGN         (1 << 4)
 300 #define IOPARM_INQUIRE_HAS_PENDING      (1 << 5)
 301 #define IOPARM_INQUIRE_HAS_SIZE         (1 << 6)
 302 #define IOPARM_INQUIRE_HAS_ID           (1 << 7)
 303
 304 typedef struct
 305 {
 306   st_parameter_common common;
 307   GFC_INTEGER_4 *exist, *opened, *number, *named;
 308   GFC_INTEGER_4 *nextrec, *recl_out;
 309   GFC_IO_INT *strm_pos_out;
 310   CHARACTER1 (file);
 311   CHARACTER2 (access);
 312   CHARACTER1 (form);
 313   CHARACTER2 (blank);
 314   CHARACTER1 (position);
 315   CHARACTER2 (action);
 316   CHARACTER1 (delim);
 317   CHARACTER2 (pad);
 318   CHARACTER1 (name);
 319   CHARACTER2 (sequential);
 320   CHARACTER1 (direct);
 321   CHARACTER2 (formatted);
 322   CHARACTER1 (unformatted);
 323   CHARACTER2 (read);
 324   CHARACTER1 (write);
 325   CHARACTER2 (readwrite);
 326   CHARACTER1 (convert);
 327   GFC_INTEGER_4 flags2;
 328   CHARACTER1 (asynchronous);
 329   CHARACTER2 (decimal);
 330   CHARACTER1 (encoding);
 331   CHARACTER2 (round);
 332   CHARACTER1 (sign);
 333   GFC_INTEGER_4 *pending;
 334   GFC_IO_INT *size;
 335   GFC_INTEGER_4 *id;
 336 }
 337 st_parameter_inquire;
 338
 339
 340 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 341 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 342 #define IOPARM_DT_HAS_REC                       (1 << 9)
 343 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 344 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 345 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 346 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 347 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 348 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 349 #define IOPARM_DT_HAS_ID                        (1 << 16)
 350 #define IOPARM_DT_HAS_POS                       (1 << 17)
 351 #define IOPARM_DT_HAS_ASYNCHRONOUS              (1 << 18)
 352 #define IOPARM_DT_HAS_BLANK                     (1 << 19)
 353 #define IOPARM_DT_HAS_DECIMAL                   (1 << 20)
 354 #define IOPARM_DT_HAS_DELIM                     (1 << 21)
 355 #define IOPARM_DT_HAS_PAD                       (1 << 22)
 356 #define IOPARM_DT_HAS_ROUND                     (1 << 23)
 357 #define IOPARM_DT_HAS_SIGN                      (1 << 24)
 358 #define IOPARM_DT_HAS_F2003                     (1 << 25)
 359 /* Internal use bit.  */
 360 #define IOPARM_DT_IONML_SET                     (1 << 31)
 361
 362
 363 typedef struct st_parameter_dt
 364 {
 365   st_parameter_common common;
 366   GFC_IO_INT rec;
 367   GFC_IO_INT *size, *iolength;
 368   gfc_array_char *internal_unit_desc;
 369   CHARACTER1 (format);
 370   CHARACTER2 (advance);
 371   CHARACTER1 (internal_unit);
 372   CHARACTER2 (namelist_name);
 373   /* Private part of the structure.  The compiler just needs
 374      to reserve enough space.  */
 375   union
 376     {
 377       struct
 378         {
 379           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 380                             size_t, size_t);
 381           struct gfc_unit *current_unit;
 382           /* Item number in a formatted data transfer.  Also used in namelist
 383              read_logical as an index into line_buffer.  */
 384           int item_count;
 385           unit_mode mode;
 386           unit_blank blank_status;
 387           unit_sign sign_status;
 388           int scale_factor;
 389           int max_pos; /* Maximum righthand column written to.  */
 390           /* Number of skips + spaces to be done for T and X-editing.  */
 391           int skips;
 392           /* Number of spaces to be done for T and X-editing.  */
 393           int pending_spaces;
 394           /* Whether an EOR condition was encountered. Value is:
 395                0 if no EOR was encountered
 396                1 if an EOR was encountered due to a 1-byte marker (LF)
 397                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 398           int sf_seen_eor;
 399           unit_advance advance_status;
 400           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 401           unsigned first_item : 1;
 402           unsigned seen_dollar : 1;
 403           unsigned eor_condition : 1;
 404           unsigned no_leading_blank : 1;
 405           unsigned char_flag : 1;
 406           unsigned input_complete : 1;
 407           unsigned at_eol : 1;
 408           unsigned comma_flag : 1;
 409           /* A namelist specific flag used in the list directed library
 410              to flag that calls are being made from namelist read (eg. to
 411              ignore comments or to treat '/' as a terminator)  */
 412           unsigned namelist_mode : 1;
 413           /* A namelist specific flag used in the list directed library
 414              to flag read errors and return, so that an attempt can be
 415              made to read a new object name.  */
 416           unsigned nml_read_error : 1;
 417           /* A sequential formatted read specific flag used to signal that a
 418              character string is being read so don't use commas to shorten a
 419              formatted field width.  */
 420           unsigned sf_read_comma : 1;
 421           /* A namelist specific flag used to enable reading input from
 422              line_buffer for logical reads.  */
 423           unsigned line_buffer_enabled : 1;
 424           /* An internal unit specific flag used to identify that the associated
 425              unit is internal.  */
 426           unsigned unit_is_internal : 1;
 427           /* An internal unit specific flag to signify an EOF condition for list
 428              directed read.  */
 429           unsigned at_eof : 1;
 430           /* Used for g0 floating point output.  */
 431           unsigned g0_no_blanks : 1;
 432           /* Used to signal use of free_format_data.  */
 433           unsigned format_not_saved : 1;
 434           /* 14 unused bits.  */
 435
 436           char last_char;
 437           char nml_delim;
 438
 439           int repeat_count;
 440           int saved_length;
 441           int saved_used;
 442           bt saved_type;
 443           char *saved_string;
 444           char *scratch;
 445           char *line_buffer;
 446           struct format_data *fmt;
 447           jmp_buf *eof_jump;
 448           namelist_info *ionml;
 449           /* A flag used to identify when a non-standard expanded namelist read
 450              has occurred.  */
 451           int expanded_read;
 452           /* Storage area for values except for strings.  Must be
 453              large enough to hold a complex value (two reals) of the
 454              largest kind.  */
 455           char value[32];
 456           GFC_IO_INT size_used;
 457         } p;
 458       /* This pad size must be equal to the pad_size declared in
 459          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 460          must be smaller or equal to this array.  */
 461       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 462     } u;
 463   GFC_INTEGER_4 *id;
 464   GFC_IO_INT pos;
 465   CHARACTER1 (asynchronous);
 466   CHARACTER2 (blank);
 467   CHARACTER1 (decimal);
 468   CHARACTER2 (delim);
 469   CHARACTER1 (pad);
 470   CHARACTER2 (round);
 471   CHARACTER1 (sign);
 472 }
 473 st_parameter_dt;
 474
 475 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 476 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 477                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 478                                   ? 1 : -1];
 479
 480 #define IOPARM_WAIT_HAS_ID              (1 << 7)
 481
 482 typedef struct
 483 {
 484   st_parameter_common common;
 485   CHARACTER1 (id);
 486 }
 487 st_parameter_wait;
 488
 489
 490 #undef CHARACTER1
 491 #undef CHARACTER2
 492
 493 typedef struct
 494 {
 495   unit_access access;
 496   unit_action action;
 497   unit_blank blank;
 498   unit_delim delim;
 499   unit_form form;
 500   int is_notpadded;
 501   unit_position position;
 502   unit_status status;
 503   unit_pad pad;
 504   unit_convert convert;
 505   int has_recl;
 506   unit_decimal decimal;
 507   unit_encoding encoding;
 508   unit_round round;
 509   unit_sign sign;
 510   unit_async async;
 511 }
 512 unit_flags;
 513
 514
 515 typedef struct gfc_unit
 516 {
 517   int unit_number;
 518   stream *s;
 519
 520   /* Treap links.  */
 521   struct gfc_unit *left, *right;
 522   int priority;
 523
 524   int read_bad, current_record, saved_pos, previous_nonadvancing_write;
 525
 526   enum
 527   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 528   endfile;
 529
 530   unit_mode mode;
 531   unit_flags flags;
 532   unit_pad pad_status;
 533   unit_decimal decimal_status;
 534   unit_delim delim_status;
 535   unit_round round_status;
 536
 537   /* recl                 -- Record length of the file.
 538      last_record          -- Last record number read or written
 539      maxrec               -- Maximum record number in a direct access file
 540      bytes_left           -- Bytes left in current record.
 541      strm_pos             -- Current position in file for STREAM I/O.
 542      recl_subrecord       -- Maximum length for subrecord.
 543      bytes_left_subrecord -- Bytes left in current subrecord.  */
 544   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 545     recl_subrecord, bytes_left_subrecord;
 546
 547   /* Set to 1 if we have read a subrecord.  */
 548
 549   int continued;
 550
 551   __gthread_mutex_t lock;
 552   /* Number of threads waiting to acquire this unit's lock.
 553      When non-zero, close_unit doesn't only removes the unit
 554      from the UNIT_ROOT tree, but doesn't free it and the
 555      last of the waiting threads will do that.
 556      This must be either atomically increased/decreased, or
 557      always guarded by UNIT_LOCK.  */
 558   int waiting;
 559   /* Flag set by close_unit if the unit as been closed.
 560      Must be manipulated under unit's lock.  */
 561   int closed;
 562
 563   /* For traversing arrays */
 564   array_loop_spec *ls;
 565   int rank;
 566
 567   int file_len;
 568   char *file;
 569
 570   /* The format hash table.  */
 571   struct format_hash_entry format_hash_table[FORMAT_HASH_SIZE];
 572
 573   /* Formatting buffer.  */
 574   struct fbuf *fbuf;
 575 }
 576 gfc_unit;
 577
 578
 579 /* unit.c */
 580
 581 /* Maximum file offset, computed at library initialization time.  */
 582 extern gfc_offset max_offset;
 583 internal_proto(max_offset);
 584
 585 /* Unit number to be assigned when NEWUNIT is used in an OPEN statement.  */
 586 extern GFC_INTEGER_4 next_available_newunit;
 587 internal_proto(next_available_newunit);
 588
 589 /* Unit tree root.  */
 590 extern gfc_unit *unit_root;
 591 internal_proto(unit_root);
 592
 593 extern __gthread_mutex_t unit_lock;
 594 internal_proto(unit_lock);
 595
 596 extern int close_unit (gfc_unit *);
 597 internal_proto(close_unit);
 598
 599 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 600 internal_proto(get_internal_unit);
 601
 602 extern void free_internal_unit (st_parameter_dt *);
 603 internal_proto(free_internal_unit);
 604
 605 extern gfc_unit *find_unit (int);
 606 internal_proto(find_unit);
 607
 608 extern gfc_unit *find_or_create_unit (int);
 609 internal_proto(find_or_create_unit);
 610
 611 extern gfc_unit *get_unit (st_parameter_dt *, int);
 612 internal_proto(get_unit);
 613
 614 extern void unlock_unit (gfc_unit *);
 615 internal_proto(unlock_unit);
 616
 617 extern void update_position (gfc_unit *);
 618 internal_proto(update_position);
 619
 620 extern void finish_last_advance_record (gfc_unit *u);
 621 internal_proto (finish_last_advance_record);
 622
 623 extern int unit_truncate (gfc_unit *, gfc_offset, st_parameter_common *);
 624 internal_proto (unit_truncate);
 625
 626 extern GFC_INTEGER_4 get_unique_unit_number (st_parameter_open *);
 627 internal_proto(get_unique_unit_number);
 628
 629 /* open.c */
 630
 631 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 632 internal_proto(new_unit);
 633
 634
 635 /* transfer.c */
 636
 637 #define SCRATCH_SIZE 300
 638
 639 extern const char *type_name (bt);
 640 internal_proto(type_name);
 641
 642 extern void * read_block_form (st_parameter_dt *, int *);
 643 internal_proto(read_block_form);
 644
 645 extern void *write_block (st_parameter_dt *, int);
 646 internal_proto(write_block);
 647
 648 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *,
 649                                      int*);
 650 internal_proto(next_array_record);
 651
 652 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *,
 653                                   gfc_offset *);
 654 internal_proto(init_loop_spec);
 655
 656 extern void next_record (st_parameter_dt *, int);
 657 internal_proto(next_record);
 658
 659 extern void reverse_memcpy (void *, const void *, size_t);
 660 internal_proto (reverse_memcpy);
 661
 662 extern void st_wait (st_parameter_wait *);
 663 export_proto(st_wait);
 664
 665 extern void hit_eof (st_parameter_dt *);
 666 internal_proto(hit_eof);
 667
 668 /* read.c */
 669
 670 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 671 internal_proto(set_integer);
 672
 673 extern GFC_UINTEGER_LARGEST max_value (int, int);
 674 internal_proto(max_value);
 675
 676 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 677 internal_proto(convert_real);
 678
 679 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 680 internal_proto(read_a);
 681
 682 extern void read_a_char4 (st_parameter_dt *, const fnode *, char *, int);
 683 internal_proto(read_a);
 684
 685 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 686 internal_proto(read_f);
 687
 688 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 689 internal_proto(read_l);
 690
 691 extern void read_x (st_parameter_dt *, int);
 692 internal_proto(read_x);
 693
 694 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 695 internal_proto(read_radix);
 696
 697 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 698 internal_proto(read_decimal);
 699
 700 /* list_read.c */
 701
 702 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 703                                  size_t);
 704 internal_proto(list_formatted_read);
 705
 706 extern void finish_list_read (st_parameter_dt *);
 707 internal_proto(finish_list_read);
 708
 709 extern void namelist_read (st_parameter_dt *);
 710 internal_proto(namelist_read);
 711
 712 extern void namelist_write (st_parameter_dt *);
 713 internal_proto(namelist_write);
 714
 715 /* write.c */
 716
 717 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 718 internal_proto(write_a);
 719
 720 extern void write_a_char4 (st_parameter_dt *, const fnode *, const char *, int);
 721 internal_proto(write_a_char4);
 722
 723 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 724 internal_proto(write_b);
 725
 726 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 727 internal_proto(write_d);
 728
 729 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 730 internal_proto(write_e);
 731
 732 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 733 internal_proto(write_en);
 734
 735 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 736 internal_proto(write_es);
 737
 738 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 739 internal_proto(write_f);
 740
 741 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 742 internal_proto(write_i);
 743
 744 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 745 internal_proto(write_l);
 746
 747 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 748 internal_proto(write_o);
 749
 750 extern void write_real (st_parameter_dt *, const char *, int);
 751 internal_proto(write_real);
 752
 753 extern void write_real_g0 (st_parameter_dt *, const char *, int, int);
 754 internal_proto(write_real_g0);
 755
 756 extern void write_x (st_parameter_dt *, int, int);
 757 internal_proto(write_x);
 758
 759 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 760 internal_proto(write_z);
 761
 762 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 763                                   size_t);
 764 internal_proto(list_formatted_write);
 765
 766 /* size_from_kind.c */
 767 extern size_t size_from_real_kind (int);
 768 internal_proto(size_from_real_kind);
 769
 770 extern size_t size_from_complex_kind (int);
 771 internal_proto(size_from_complex_kind);
 772
 773
 774 /* lock.c */
 775 extern void free_ionml (st_parameter_dt *);
 776 internal_proto(free_ionml);
 777
 778 static inline void
 779 inc_waiting_locked (gfc_unit *u)
 780 {
 781 #ifdef HAVE_SYNC_FETCH_AND_ADD
 782   (void) __sync_fetch_and_add (&u->waiting, 1);
 783 #else
 784   u->waiting++;
 785 #endif
 786 }
 787
 788 static inline int
 789 predec_waiting_locked (gfc_unit *u)
 790 {
 791 #ifdef HAVE_SYNC_FETCH_AND_ADD
 792   return __sync_add_and_fetch (&u->waiting, -1);
 793 #else
 794   return --u->waiting;
 795 #endif
 796 }
 797
 798 static inline void
 799 dec_waiting_unlocked (gfc_unit *u)
 800 {
 801 #ifdef HAVE_SYNC_FETCH_AND_ADD
 802   (void) __sync_fetch_and_add (&u->waiting, -1);
 803 #else
 804   __gthread_mutex_lock (&unit_lock);
 805   u->waiting--;
 806   __gthread_mutex_unlock (&unit_lock);
 807 #endif
 808 }
 809
 810 #endif
 811