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 /* Forward declarations.  */
  38 struct st_parameter_dt;
  39 typedef struct stream stream;
  40 struct fbuf;
  41 struct format_data;
  42 typedef struct fnode fnode;
  43 struct gfc_unit;
  44
  45
  46 /* Macros for testing what kinds of I/O we are doing.  */
  47
  48 #define is_array_io(dtp) ((dtp)->internal_unit_desc)
  49
  50 #define is_internal_unit(dtp) ((dtp)->u.p.unit_is_internal)
  51
  52 #define is_stream_io(dtp) ((dtp)->u.p.current_unit->flags.access == ACCESS_STREAM)
  53
  54 #define is_char4_unit(dtp) ((dtp)->u.p.unit_is_internal && (dtp)->common.unit)
  55
  56 /* The array_loop_spec contains the variables for the loops over index ranges
  57    that are encountered.  Since the variables can be negative, ssize_t
  58    is used.  */
  59
  60 typedef struct array_loop_spec
  61 {
  62   /* Index counter for this dimension.  */
  63   ssize_t idx;
  64
  65   /* Start for the index counter.  */
  66   ssize_t start;
  67
  68   /* End for the index counter.  */
  69   ssize_t end;
  70
  71   /* Step for the index counter.  */
  72   ssize_t step;
  73 }
  74 array_loop_spec;
  75
  76 /* A stucture to build a hash table for format data.  */
  77
  78 #define FORMAT_HASH_SIZE 16
  79
  80 typedef struct format_hash_entry
  81 {
  82   char *key;
  83   gfc_charlen_type key_len;
  84   struct format_data *hashed_fmt;
  85 }
  86 format_hash_entry;
  87
  88 /* Representation of a namelist object in libgfortran
  89
  90    Namelist Records
  91       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
  92      or
  93       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
  94
  95    The object can be a fully qualified, compound name for an intrinsic
  96    type, derived types or derived type components.  So, a substring
  97    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
  98    read. Hence full information about the structure of the object has
  99    to be available to list_read.c and write.
 100
 101    These requirements are met by the following data structures.
 102
 103    namelist_info type contains all the scalar information about the
 104    object and arrays of descriptor_dimension and array_loop_spec types for
 105    arrays.  */
 106
 107 typedef struct namelist_type
 108 {
 109   /* Object type.  */
 110   bt type;
 111
 112   /* Object name.  */
 113   char * var_name;
 114
 115   /* Address for the start of the object's data.  */
 116   void * mem_pos;
 117
 118   /* Flag to show that a read is to be attempted for this node.  */
 119   int touched;
 120
 121   /* Length of intrinsic type in bytes.  */
 122   int len;
 123
 124   /* Rank of the object.  */
 125   int var_rank;
 126
 127   /* Overall size of the object in bytes.  */
 128   index_type size;
 129
 130   /* Length of character string.  */
 131   index_type string_length;
 132
 133   descriptor_dimension * dim;
 134   array_loop_spec * ls;
 135   struct namelist_type * next;
 136 }
 137 namelist_info;
 138
 139 /* Options for the OPEN statement.  */
 140
 141 typedef enum
 142 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 143   ACCESS_UNSPECIFIED
 144 }
 145 unit_access;
 146
 147 typedef enum
 148 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 149   ACTION_UNSPECIFIED
 150 }
 151 unit_action;
 152
 153 typedef enum
 154 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 155 unit_blank;
 156
 157 typedef enum
 158 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 159   DELIM_UNSPECIFIED
 160 }
 161 unit_delim;
 162
 163 typedef enum
 164 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 165 unit_form;
 166
 167 typedef enum
 168 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 169   POSITION_UNSPECIFIED
 170 }
 171 unit_position;
 172
 173 typedef enum
 174 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 175   STATUS_REPLACE, STATUS_UNSPECIFIED
 176 }
 177 unit_status;
 178
 179 typedef enum
 180 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 181 unit_pad;
 182
 183 typedef enum
 184 { DECIMAL_POINT, DECIMAL_COMMA, DECIMAL_UNSPECIFIED }
 185 unit_decimal;
 186
 187 typedef enum
 188 { ENCODING_UTF8, ENCODING_DEFAULT, ENCODING_UNSPECIFIED }
 189 unit_encoding;
 190
 191 typedef enum
 192 { ROUND_UP, ROUND_DOWN, ROUND_ZERO, ROUND_NEAREST, ROUND_COMPATIBLE,
 193   ROUND_PROCDEFINED, ROUND_UNSPECIFIED }
 194 unit_round;
 195
 196 /* NOTE: unit_sign must correspond with the sign_status enumerator in
 197    st_parameter_dt to not break the ABI.  */
 198 typedef enum
 199 { SIGN_PROCDEFINED, SIGN_SUPPRESS, SIGN_PLUS, SIGN_UNSPECIFIED }
 200 unit_sign;
 201
 202 typedef enum
 203 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 204 unit_advance;
 205
 206 typedef enum
 207 {READING, WRITING}
 208 unit_mode;
 209
 210 typedef enum
 211 { ASYNC_YES, ASYNC_NO, ASYNC_UNSPECIFIED }
 212 unit_async;
 213
 214 typedef enum
 215 { SIGN_S, SIGN_SS, SIGN_SP }
 216 unit_sign_s;
 217
 218 #define CHARACTER1(name) \
 219               char * name; \
 220               gfc_charlen_type name ## _len
 221 #define CHARACTER2(name) \
 222               gfc_charlen_type name ## _len; \
 223               char * name
 224
 225 typedef struct
 226 {
 227   st_parameter_common common;
 228   GFC_INTEGER_4 recl_in;
 229   CHARACTER2 (file);
 230   CHARACTER1 (status);
 231   CHARACTER2 (access);
 232   CHARACTER1 (form);
 233   CHARACTER2 (blank);
 234   CHARACTER1 (position);
 235   CHARACTER2 (action);
 236   CHARACTER1 (delim);
 237   CHARACTER2 (pad);
 238   CHARACTER1 (convert);
 239   CHARACTER2 (decimal);
 240   CHARACTER1 (encoding);
 241   CHARACTER2 (round);
 242   CHARACTER1 (sign);
 243   CHARACTER2 (asynchronous);
 244   GFC_INTEGER_4 *newunit;
 245 }
 246 st_parameter_open;
 247
 248 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 249
 250 typedef struct
 251 {
 252   st_parameter_common common;
 253   CHARACTER1 (status);
 254 }
 255 st_parameter_close;
 256
 257 typedef struct
 258 {
 259   st_parameter_common common;
 260 }
 261 st_parameter_filepos;
 262
 263 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 264 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 265 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 266 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 267 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 268 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 269 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 270 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 271 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 272 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 273 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 274 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 275 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 276 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 277 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 278 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 279 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 280 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 281 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 282 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 283 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 284 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 285 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 286 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 287 #define IOPARM_INQUIRE_HAS_FLAGS2       (1 << 31)
 288
 289 #define IOPARM_INQUIRE_HAS_ASYNCHRONOUS (1 << 0)
 290 #define IOPARM_INQUIRE_HAS_DECIMAL      (1 << 1)
 291 #define IOPARM_INQUIRE_HAS_ENCODING     (1 << 2)
 292 #define IOPARM_INQUIRE_HAS_ROUND        (1 << 3)
 293 #define IOPARM_INQUIRE_HAS_SIGN         (1 << 4)
 294 #define IOPARM_INQUIRE_HAS_PENDING      (1 << 5)
 295 #define IOPARM_INQUIRE_HAS_SIZE         (1 << 6)
 296 #define IOPARM_INQUIRE_HAS_ID           (1 << 7)
 297
 298 typedef struct
 299 {
 300   st_parameter_common common;
 301   GFC_INTEGER_4 *exist, *opened, *number, *named;
 302   GFC_INTEGER_4 *nextrec, *recl_out;
 303   GFC_IO_INT *strm_pos_out;
 304   CHARACTER1 (file);
 305   CHARACTER2 (access);
 306   CHARACTER1 (form);
 307   CHARACTER2 (blank);
 308   CHARACTER1 (position);
 309   CHARACTER2 (action);
 310   CHARACTER1 (delim);
 311   CHARACTER2 (pad);
 312   CHARACTER1 (name);
 313   CHARACTER2 (sequential);
 314   CHARACTER1 (direct);
 315   CHARACTER2 (formatted);
 316   CHARACTER1 (unformatted);
 317   CHARACTER2 (read);
 318   CHARACTER1 (write);
 319   CHARACTER2 (readwrite);
 320   CHARACTER1 (convert);
 321   GFC_INTEGER_4 flags2;
 322   CHARACTER1 (asynchronous);
 323   CHARACTER2 (decimal);
 324   CHARACTER1 (encoding);
 325   CHARACTER2 (round);
 326   CHARACTER1 (sign);
 327   GFC_INTEGER_4 *pending;
 328   GFC_IO_INT *size;
 329   GFC_INTEGER_4 *id;
 330 }
 331 st_parameter_inquire;
 332
 333
 334 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 335 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 336 #define IOPARM_DT_HAS_REC                       (1 << 9)
 337 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 338 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 339 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 340 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 341 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 342 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 343 #define IOPARM_DT_HAS_ID                        (1 << 16)
 344 #define IOPARM_DT_HAS_POS                       (1 << 17)
 345 #define IOPARM_DT_HAS_ASYNCHRONOUS              (1 << 18)
 346 #define IOPARM_DT_HAS_BLANK                     (1 << 19)
 347 #define IOPARM_DT_HAS_DECIMAL                   (1 << 20)
 348 #define IOPARM_DT_HAS_DELIM                     (1 << 21)
 349 #define IOPARM_DT_HAS_PAD                       (1 << 22)
 350 #define IOPARM_DT_HAS_ROUND                     (1 << 23)
 351 #define IOPARM_DT_HAS_SIGN                      (1 << 24)
 352 #define IOPARM_DT_HAS_F2003                     (1 << 25)
 353 /* Internal use bit.  */
 354 #define IOPARM_DT_IONML_SET                     (1 << 31)
 355
 356
 357 typedef struct st_parameter_dt
 358 {
 359   st_parameter_common common;
 360   GFC_IO_INT rec;
 361   GFC_IO_INT *size, *iolength;
 362   gfc_array_char *internal_unit_desc;
 363   CHARACTER1 (format);
 364   CHARACTER2 (advance);
 365   CHARACTER1 (internal_unit);
 366   CHARACTER2 (namelist_name);
 367   /* Private part of the structure.  The compiler just needs
 368      to reserve enough space.  */
 369   union
 370     {
 371       struct
 372         {
 373           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 374                             size_t, size_t);
 375           struct gfc_unit *current_unit;
 376           /* Item number in a formatted data transfer.  Also used in namelist
 377              read_logical as an index into line_buffer.  */
 378           int item_count;
 379           unit_mode mode;
 380           unit_blank blank_status;
 381           unit_sign sign_status;
 382           int scale_factor;
 383           int max_pos; /* Maximum righthand column written to.  */
 384           /* Number of skips + spaces to be done for T and X-editing.  */
 385           int skips;
 386           /* Number of spaces to be done for T and X-editing.  */
 387           int pending_spaces;
 388           /* Whether an EOR condition was encountered. Value is:
 389                0 if no EOR was encountered
 390                1 if an EOR was encountered due to a 1-byte marker (LF)
 391                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 392           int sf_seen_eor;
 393           unit_advance advance_status;
 394           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 395           unsigned first_item : 1;
 396           unsigned seen_dollar : 1;
 397           unsigned eor_condition : 1;
 398           unsigned no_leading_blank : 1;
 399           unsigned char_flag : 1;
 400           unsigned input_complete : 1;
 401           unsigned at_eol : 1;
 402           unsigned comma_flag : 1;
 403           /* A namelist specific flag used in the list directed library
 404              to flag that calls are being made from namelist read (eg. to
 405              ignore comments or to treat '/' as a terminator)  */
 406           unsigned namelist_mode : 1;
 407           /* A namelist specific flag used in the list directed library
 408              to flag read errors and return, so that an attempt can be
 409              made to read a new object name.  */
 410           unsigned nml_read_error : 1;
 411           /* A sequential formatted read specific flag used to signal that a
 412              character string is being read so don't use commas to shorten a
 413              formatted field width.  */
 414           unsigned sf_read_comma : 1;
 415           /* A namelist specific flag used to enable reading input from
 416              line_buffer for logical reads.  */
 417           unsigned line_buffer_enabled : 1;
 418           /* An internal unit specific flag used to identify that the associated
 419              unit is internal.  */
 420           unsigned unit_is_internal : 1;
 421           /* An internal unit specific flag to signify an EOF condition for list
 422              directed read.  */
 423           unsigned at_eof : 1;
 424           /* Used for g0 floating point output.  */
 425           unsigned g0_no_blanks : 1;
 426           /* Used to signal use of free_format_data.  */
 427           unsigned format_not_saved : 1;
 428           /* 14 unused bits.  */
 429
 430           char last_char;
 431           char nml_delim;
 432
 433           int repeat_count;
 434           int saved_length;
 435           int saved_used;
 436           bt saved_type;
 437           char *saved_string;
 438           char *scratch;
 439           char *line_buffer;
 440           struct format_data *fmt;
 441           jmp_buf *eof_jump;
 442           namelist_info *ionml;
 443           /* A flag used to identify when a non-standard expanded namelist read
 444              has occurred.  */
 445           int expanded_read;
 446           /* Storage area for values except for strings.  Must be
 447              large enough to hold a complex value (two reals) of the
 448              largest kind.  */
 449           char value[32];
 450           GFC_IO_INT size_used;
 451         } p;
 452       /* This pad size must be equal to the pad_size declared in
 453          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 454          must be smaller or equal to this array.  */
 455       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 456     } u;
 457   GFC_INTEGER_4 *id;
 458   GFC_IO_INT pos;
 459   CHARACTER1 (asynchronous);
 460   CHARACTER2 (blank);
 461   CHARACTER1 (decimal);
 462   CHARACTER2 (delim);
 463   CHARACTER1 (pad);
 464   CHARACTER2 (round);
 465   CHARACTER1 (sign);
 466 }
 467 st_parameter_dt;
 468
 469 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 470 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 471                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 472                                   ? 1 : -1];
 473
 474 #define IOPARM_WAIT_HAS_ID              (1 << 7)
 475
 476 typedef struct
 477 {
 478   st_parameter_common common;
 479   CHARACTER1 (id);
 480 }
 481 st_parameter_wait;
 482
 483
 484 #undef CHARACTER1
 485 #undef CHARACTER2
 486
 487 typedef struct
 488 {
 489   unit_access access;
 490   unit_action action;
 491   unit_blank blank;
 492   unit_delim delim;
 493   unit_form form;
 494   int is_notpadded;
 495   unit_position position;
 496   unit_status status;
 497   unit_pad pad;
 498   unit_convert convert;
 499   int has_recl;
 500   unit_decimal decimal;
 501   unit_encoding encoding;
 502   unit_round round;
 503   unit_sign sign;
 504   unit_async async;
 505 }
 506 unit_flags;
 507
 508
 509 typedef struct gfc_unit
 510 {
 511   int unit_number;
 512   stream *s;
 513
 514   /* Treap links.  */
 515   struct gfc_unit *left, *right;
 516   int priority;
 517
 518   int read_bad, current_record, saved_pos, previous_nonadvancing_write;
 519
 520   enum
 521   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 522   endfile;
 523
 524   unit_mode mode;
 525   unit_flags flags;
 526   unit_pad pad_status;
 527   unit_decimal decimal_status;
 528   unit_delim delim_status;
 529   unit_round round_status;
 530
 531   /* recl                 -- Record length of the file.
 532      last_record          -- Last record number read or written
 533      maxrec               -- Maximum record number in a direct access file
 534      bytes_left           -- Bytes left in current record.
 535      strm_pos             -- Current position in file for STREAM I/O.
 536      recl_subrecord       -- Maximum length for subrecord.
 537      bytes_left_subrecord -- Bytes left in current subrecord.  */
 538   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 539     recl_subrecord, bytes_left_subrecord;
 540
 541   /* Set to 1 if we have read a subrecord.  */
 542
 543   int continued;
 544
 545   __gthread_mutex_t lock;
 546   /* Number of threads waiting to acquire this unit's lock.
 547      When non-zero, close_unit doesn't only removes the unit
 548      from the UNIT_ROOT tree, but doesn't free it and the
 549      last of the waiting threads will do that.
 550      This must be either atomically increased/decreased, or
 551      always guarded by UNIT_LOCK.  */
 552   int waiting;
 553   /* Flag set by close_unit if the unit as been closed.
 554      Must be manipulated under unit's lock.  */
 555   int closed;
 556
 557   /* For traversing arrays */
 558   array_loop_spec *ls;
 559   int rank;
 560
 561   int file_len;
 562   char *file;
 563
 564   /* The format hash table.  */
 565   struct format_hash_entry format_hash_table[FORMAT_HASH_SIZE];
 566
 567   /* Formatting buffer.  */
 568   struct fbuf *fbuf;
 569 }
 570 gfc_unit;
 571
 572
 573 /* unit.c */
 574
 575 /* Maximum file offset, computed at library initialization time.  */
 576 extern gfc_offset max_offset;
 577 internal_proto(max_offset);
 578
 579 /* Unit number to be assigned when NEWUNIT is used in an OPEN statement.  */
 580 extern GFC_INTEGER_4 next_available_newunit;
 581 internal_proto(next_available_newunit);
 582
 583 /* Unit tree root.  */
 584 extern gfc_unit *unit_root;
 585 internal_proto(unit_root);
 586
 587 extern __gthread_mutex_t unit_lock;
 588 internal_proto(unit_lock);
 589
 590 extern int close_unit (gfc_unit *);
 591 internal_proto(close_unit);
 592
 593 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 594 internal_proto(get_internal_unit);
 595
 596 extern void free_internal_unit (st_parameter_dt *);
 597 internal_proto(free_internal_unit);
 598
 599 extern gfc_unit *find_unit (int);
 600 internal_proto(find_unit);
 601
 602 extern gfc_unit *find_or_create_unit (int);
 603 internal_proto(find_or_create_unit);
 604
 605 extern gfc_unit *get_unit (st_parameter_dt *, int);
 606 internal_proto(get_unit);
 607
 608 extern void unlock_unit (gfc_unit *);
 609 internal_proto(unlock_unit);
 610
 611 extern void update_position (gfc_unit *);
 612 internal_proto(update_position);
 613
 614 extern void finish_last_advance_record (gfc_unit *u);
 615 internal_proto (finish_last_advance_record);
 616
 617 extern int unit_truncate (gfc_unit *, gfc_offset, st_parameter_common *);
 618 internal_proto (unit_truncate);
 619
 620 extern GFC_INTEGER_4 get_unique_unit_number (st_parameter_open *);
 621 internal_proto(get_unique_unit_number);
 622
 623 /* open.c */
 624
 625 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 626 internal_proto(new_unit);
 627
 628
 629 /* transfer.c */
 630
 631 #define SCRATCH_SIZE 300
 632
 633 extern const char *type_name (bt);
 634 internal_proto(type_name);
 635
 636 extern void * read_block_form (st_parameter_dt *, int *);
 637 internal_proto(read_block_form);
 638
 639 extern void * read_block_form4 (st_parameter_dt *, int *);
 640 internal_proto(read_block_form4);
 641
 642 extern void *write_block (st_parameter_dt *, int);
 643 internal_proto(write_block);
 644
 645 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *,
 646                                      int*);
 647 internal_proto(next_array_record);
 648
 649 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *,
 650                                   gfc_offset *);
 651 internal_proto(init_loop_spec);
 652
 653 extern void next_record (st_parameter_dt *, int);
 654 internal_proto(next_record);
 655
 656 extern void reverse_memcpy (void *, const void *, size_t);
 657 internal_proto (reverse_memcpy);
 658
 659 extern void st_wait (st_parameter_wait *);
 660 export_proto(st_wait);
 661
 662 extern void hit_eof (st_parameter_dt *);
 663 internal_proto(hit_eof);
 664
 665 /* read.c */
 666
 667 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 668 internal_proto(set_integer);
 669
 670 extern GFC_UINTEGER_LARGEST max_value (int, int);
 671 internal_proto(max_value);
 672
 673 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 674 internal_proto(convert_real);
 675
 676 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 677 internal_proto(read_a);
 678
 679 extern void read_a_char4 (st_parameter_dt *, const fnode *, char *, int);
 680 internal_proto(read_a);
 681
 682 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 683 internal_proto(read_f);
 684
 685 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 686 internal_proto(read_l);
 687
 688 extern void read_x (st_parameter_dt *, int);
 689 internal_proto(read_x);
 690
 691 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 692 internal_proto(read_radix);
 693
 694 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 695 internal_proto(read_decimal);
 696
 697 /* list_read.c */
 698
 699 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 700                                  size_t);
 701 internal_proto(list_formatted_read);
 702
 703 extern void finish_list_read (st_parameter_dt *);
 704 internal_proto(finish_list_read);
 705
 706 extern void namelist_read (st_parameter_dt *);
 707 internal_proto(namelist_read);
 708
 709 extern void namelist_write (st_parameter_dt *);
 710 internal_proto(namelist_write);
 711
 712 /* write.c */
 713
 714 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 715 internal_proto(write_a);
 716
 717 extern void write_a_char4 (st_parameter_dt *, const fnode *, const char *, int);
 718 internal_proto(write_a_char4);
 719
 720 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 721 internal_proto(write_b);
 722
 723 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 724 internal_proto(write_d);
 725
 726 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 727 internal_proto(write_e);
 728
 729 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 730 internal_proto(write_en);
 731
 732 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 733 internal_proto(write_es);
 734
 735 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 736 internal_proto(write_f);
 737
 738 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 739 internal_proto(write_i);
 740
 741 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 742 internal_proto(write_l);
 743
 744 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 745 internal_proto(write_o);
 746
 747 extern void write_real (st_parameter_dt *, const char *, int);
 748 internal_proto(write_real);
 749
 750 extern void write_real_g0 (st_parameter_dt *, const char *, int, int);
 751 internal_proto(write_real_g0);
 752
 753 extern void write_x (st_parameter_dt *, int, int);
 754 internal_proto(write_x);
 755
 756 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 757 internal_proto(write_z);
 758
 759 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 760                                   size_t);
 761 internal_proto(list_formatted_write);
 762
 763 /* size_from_kind.c */
 764 extern size_t size_from_real_kind (int);
 765 internal_proto(size_from_real_kind);
 766
 767 extern size_t size_from_complex_kind (int);
 768 internal_proto(size_from_complex_kind);
 769
 770
 771 /* lock.c */
 772 extern void free_ionml (st_parameter_dt *);
 773 internal_proto(free_ionml);
 774
 775 static inline void
 776 inc_waiting_locked (gfc_unit *u)
 777 {
 778 #ifdef HAVE_SYNC_FETCH_AND_ADD
 779   (void) __sync_fetch_and_add (&u->waiting, 1);
 780 #else
 781   u->waiting++;
 782 #endif
 783 }
 784
 785 static inline int
 786 predec_waiting_locked (gfc_unit *u)
 787 {
 788 #ifdef HAVE_SYNC_FETCH_AND_ADD
 789   return __sync_add_and_fetch (&u->waiting, -1);
 790 #else
 791   return --u->waiting;
 792 #endif
 793 }
 794
 795 static inline void
 796 dec_waiting_unlocked (gfc_unit *u)
 797 {
 798 #ifdef HAVE_SYNC_FETCH_AND_ADD
 799   (void) __sync_fetch_and_add (&u->waiting, -1);
 800 #else
 801   __gthread_mutex_lock (&unit_lock);
 802   u->waiting--;
 803   __gthread_mutex_unlock (&unit_lock);
 804 #endif
 805 }
 806
 807 #endif
 808