libgfortran/io/io.h

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010,
   2    2011
   3    Free Software Foundation, Inc.
   4    Contributed by Andy Vaught
   5    F2003 I/O support contributed by Jerry DeLisle
   6
   7 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   8
   9 Libgfortran is free software; you can redistribute it and/or modify
  10 it under the terms of the GNU General Public License as published by
  11 the Free Software Foundation; either version 3, or (at your option)
  12 any later version.
  13
  14 Libgfortran is distributed in the hope that it will be useful,
  15 but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 GNU General Public License for more details.
  18
  19 Under Section 7 of GPL version 3, you are granted additional
  20 permissions described in the GCC Runtime Library Exception, version
  21 3.1, as published by the Free Software Foundation.
  22
  23 You should have received a copy of the GNU General Public License and
  24 a copy of the GCC Runtime Library Exception along with this program;
  25 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  26 <http://www.gnu.org/licenses/>.  */
  27
  28 #ifndef GFOR_IO_H
  29 #define GFOR_IO_H
  30
  31 /* IO library include.  */
  32
  33 #include "libgfortran.h"
  34
  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.  */
  58
  59 typedef struct array_loop_spec
  60 {
  61   /* Index counter for this dimension.  */
  62   index_type idx;
  63
  64   /* Start for the index counter.  */
  65   index_type start;
  66
  67   /* End for the index counter.  */
  68   index_type end;
  69
  70   /* Step for the index counter.  */
  71   index_type step;
  72 }
  73 array_loop_spec;
  74
  75 /* A stucture to build a hash table for format data.  */
  76
  77 #define FORMAT_HASH_SIZE 16
  78
  79 typedef struct format_hash_entry
  80 {
  81   char *key;
  82   gfc_charlen_type key_len;
  83   struct format_data *hashed_fmt;
  84 }
  85 format_hash_entry;
  86
  87 /* Representation of a namelist object in libgfortran
  88
  89    Namelist Records
  90       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
  91      or
  92       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
  93
  94    The object can be a fully qualified, compound name for an intrinsic
  95    type, derived types or derived type components.  So, a substring
  96    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
  97    read. Hence full information about the structure of the object has
  98    to be available to list_read.c and write.
  99
 100    These requirements are met by the following data structures.
 101
 102    namelist_info type contains all the scalar information about the
 103    object and arrays of descriptor_dimension and array_loop_spec types for
 104    arrays.  */
 105
 106 typedef struct namelist_type
 107 {
 108   /* Object type.  */
 109   bt type;
 110
 111   /* Object name.  */
 112   char * var_name;
 113
 114   /* Address for the start of the object's data.  */
 115   void * mem_pos;
 116
 117   /* Flag to show that a read is to be attempted for this node.  */
 118   int touched;
 119
 120   /* Length of intrinsic type in bytes.  */
 121   int len;
 122
 123   /* Rank of the object.  */
 124   int var_rank;
 125
 126   /* Overall size of the object in bytes.  */
 127   index_type size;
 128
 129   /* Length of character string.  */
 130   index_type string_length;
 131
 132   descriptor_dimension * dim;
 133   array_loop_spec * ls;
 134   struct namelist_type * next;
 135 }
 136 namelist_info;
 137
 138 /* Options for the OPEN statement.  */
 139
 140 typedef enum
 141 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 142   ACCESS_UNSPECIFIED
 143 }
 144 unit_access;
 145
 146 typedef enum
 147 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 148   ACTION_UNSPECIFIED
 149 }
 150 unit_action;
 151
 152 typedef enum
 153 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 154 unit_blank;
 155
 156 typedef enum
 157 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 158   DELIM_UNSPECIFIED
 159 }
 160 unit_delim;
 161
 162 typedef enum
 163 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 164 unit_form;
 165
 166 typedef enum
 167 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 168   POSITION_UNSPECIFIED
 169 }
 170 unit_position;
 171
 172 typedef enum
 173 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 174   STATUS_REPLACE, STATUS_UNSPECIFIED
 175 }
 176 unit_status;
 177
 178 typedef enum
 179 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 180 unit_pad;
 181
 182 typedef enum
 183 { DECIMAL_POINT, DECIMAL_COMMA, DECIMAL_UNSPECIFIED }
 184 unit_decimal;
 185
 186 typedef enum
 187 { ENCODING_UTF8, ENCODING_DEFAULT, ENCODING_UNSPECIFIED }
 188 unit_encoding;
 189
 190 typedef enum
 191 { ROUND_UP, ROUND_DOWN, ROUND_ZERO, ROUND_NEAREST, ROUND_COMPATIBLE,
 192   ROUND_PROCDEFINED, ROUND_UNSPECIFIED }
 193 unit_round;
 194
 195 /* NOTE: unit_sign must correspond with the sign_status enumerator in
 196    st_parameter_dt to not break the ABI.  */
 197 typedef enum
 198 { SIGN_PROCDEFINED, SIGN_SUPPRESS, SIGN_PLUS, SIGN_UNSPECIFIED }
 199 unit_sign;
 200
 201 typedef enum
 202 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 203 unit_advance;
 204
 205 typedef enum
 206 {READING, WRITING}
 207 unit_mode;
 208
 209 typedef enum
 210 { ASYNC_YES, ASYNC_NO, ASYNC_UNSPECIFIED }
 211 unit_async;
 212
 213 typedef enum
 214 { SIGN_S, SIGN_SS, SIGN_SP }
 215 unit_sign_s;
 216
 217 #define CHARACTER1(name) \
 218               char * name; \
 219               gfc_charlen_type name ## _len
 220 #define CHARACTER2(name) \
 221               gfc_charlen_type name ## _len; \
 222               char * name
 223
 224 typedef struct
 225 {
 226   st_parameter_common common;
 227   GFC_INTEGER_4 recl_in;
 228   CHARACTER2 (file);
 229   CHARACTER1 (status);
 230   CHARACTER2 (access);
 231   CHARACTER1 (form);
 232   CHARACTER2 (blank);
 233   CHARACTER1 (position);
 234   CHARACTER2 (action);
 235   CHARACTER1 (delim);
 236   CHARACTER2 (pad);
 237   CHARACTER1 (convert);
 238   CHARACTER2 (decimal);
 239   CHARACTER1 (encoding);
 240   CHARACTER2 (round);
 241   CHARACTER1 (sign);
 242   CHARACTER2 (asynchronous);
 243   GFC_INTEGER_4 *newunit;
 244 }
 245 st_parameter_open;
 246
 247 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 248
 249 typedef struct
 250 {
 251   st_parameter_common common;
 252   CHARACTER1 (status);
 253 }
 254 st_parameter_close;
 255
 256 typedef struct
 257 {
 258   st_parameter_common common;
 259 }
 260 st_parameter_filepos;
 261
 262 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 263 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 264 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 265 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 266 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 267 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 268 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 269 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 270 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 271 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 272 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 273 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 274 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 275 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 276 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 277 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 278 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 279 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 280 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 281 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 282 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 283 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 284 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 285 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 286 #define IOPARM_INQUIRE_HAS_FLAGS2       (1 << 31)
 287
 288 #define IOPARM_INQUIRE_HAS_ASYNCHRONOUS (1 << 0)
 289 #define IOPARM_INQUIRE_HAS_DECIMAL      (1 << 1)
 290 #define IOPARM_INQUIRE_HAS_ENCODING     (1 << 2)
 291 #define IOPARM_INQUIRE_HAS_ROUND        (1 << 3)
 292 #define IOPARM_INQUIRE_HAS_SIGN         (1 << 4)
 293 #define IOPARM_INQUIRE_HAS_PENDING      (1 << 5)
 294 #define IOPARM_INQUIRE_HAS_SIZE         (1 << 6)
 295 #define IOPARM_INQUIRE_HAS_ID           (1 << 7)
 296
 297 typedef struct
 298 {
 299   st_parameter_common common;
 300   GFC_INTEGER_4 *exist, *opened, *number, *named;
 301   GFC_INTEGER_4 *nextrec, *recl_out;
 302   GFC_IO_INT *strm_pos_out;
 303   CHARACTER1 (file);
 304   CHARACTER2 (access);
 305   CHARACTER1 (form);
 306   CHARACTER2 (blank);
 307   CHARACTER1 (position);
 308   CHARACTER2 (action);
 309   CHARACTER1 (delim);
 310   CHARACTER2 (pad);
 311   CHARACTER1 (name);
 312   CHARACTER2 (sequential);
 313   CHARACTER1 (direct);
 314   CHARACTER2 (formatted);
 315   CHARACTER1 (unformatted);
 316   CHARACTER2 (read);
 317   CHARACTER1 (write);
 318   CHARACTER2 (readwrite);
 319   CHARACTER1 (convert);
 320   GFC_INTEGER_4 flags2;
 321   CHARACTER1 (asynchronous);
 322   CHARACTER2 (decimal);
 323   CHARACTER1 (encoding);
 324   CHARACTER2 (round);
 325   CHARACTER1 (sign);
 326   GFC_INTEGER_4 *pending;
 327   GFC_IO_INT *size;
 328   GFC_INTEGER_4 *id;
 329 }
 330 st_parameter_inquire;
 331
 332
 333 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 334 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 335 #define IOPARM_DT_HAS_REC                       (1 << 9)
 336 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 337 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 338 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 339 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 340 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 341 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 342 #define IOPARM_DT_HAS_ID                        (1 << 16)
 343 #define IOPARM_DT_HAS_POS                       (1 << 17)
 344 #define IOPARM_DT_HAS_ASYNCHRONOUS              (1 << 18)
 345 #define IOPARM_DT_HAS_BLANK                     (1 << 19)
 346 #define IOPARM_DT_HAS_DECIMAL                   (1 << 20)
 347 #define IOPARM_DT_HAS_DELIM                     (1 << 21)
 348 #define IOPARM_DT_HAS_PAD                       (1 << 22)
 349 #define IOPARM_DT_HAS_ROUND                     (1 << 23)
 350 #define IOPARM_DT_HAS_SIGN                      (1 << 24)
 351 #define IOPARM_DT_HAS_F2003                     (1 << 25)
 352 /* Internal use bit.  */
 353 #define IOPARM_DT_IONML_SET                     (1 << 31)
 354
 355
 356 typedef struct st_parameter_dt
 357 {
 358   st_parameter_common common;
 359   GFC_IO_INT rec;
 360   GFC_IO_INT *size, *iolength;
 361   gfc_array_char *internal_unit_desc;
 362   CHARACTER1 (format);
 363   CHARACTER2 (advance);
 364   CHARACTER1 (internal_unit);
 365   CHARACTER2 (namelist_name);
 366   /* Private part of the structure.  The compiler just needs
 367      to reserve enough space.  */
 368   union
 369     {
 370       struct
 371         {
 372           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 373                             size_t, size_t);
 374           struct gfc_unit *current_unit;
 375           /* Item number in a formatted data transfer.  Also used in namelist
 376              read_logical as an index into line_buffer.  */
 377           int item_count;
 378           unit_mode mode;
 379           unit_blank blank_status;
 380           unit_sign sign_status;
 381           int scale_factor;
 382           int max_pos; /* Maximum righthand column written to.  */
 383           /* Number of skips + spaces to be done for T and X-editing.  */
 384           int skips;
 385           /* Number of spaces to be done for T and X-editing.  */
 386           int pending_spaces;
 387           /* Whether an EOR condition was encountered. Value is:
 388                0 if no EOR was encountered
 389                1 if an EOR was encountered due to a 1-byte marker (LF)
 390                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 391           int sf_seen_eor;
 392           unit_advance advance_status;
 393           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 394           unsigned first_item : 1;
 395           unsigned seen_dollar : 1;
 396           unsigned eor_condition : 1;
 397           unsigned no_leading_blank : 1;
 398           unsigned char_flag : 1;
 399           unsigned input_complete : 1;
 400           unsigned at_eol : 1;
 401           unsigned comma_flag : 1;
 402           /* A namelist specific flag used in the list directed library
 403              to flag that calls are being made from namelist read (eg. to
 404              ignore comments or to treat '/' as a terminator)  */
 405           unsigned namelist_mode : 1;
 406           /* A namelist specific flag used in the list directed library
 407              to flag read errors and return, so that an attempt can be
 408              made to read a new object name.  */
 409           unsigned nml_read_error : 1;
 410           /* A sequential formatted read specific flag used to signal that a
 411              character string is being read so don't use commas to shorten a
 412              formatted field width.  */
 413           unsigned sf_read_comma : 1;
 414           /* A namelist specific flag used to enable reading input from
 415              line_buffer for logical reads.  */
 416           unsigned line_buffer_enabled : 1;
 417           /* An internal unit specific flag used to identify that the associated
 418              unit is internal.  */
 419           unsigned unit_is_internal : 1;
 420           /* An internal unit specific flag to signify an EOF condition for list
 421              directed read.  */
 422           unsigned at_eof : 1;
 423           /* Used for g0 floating point output.  */
 424           unsigned g0_no_blanks : 1;
 425           /* Used to signal use of free_format_data.  */
 426           unsigned format_not_saved : 1;
 427           /* 14 unused bits.  */
 428
 429           /* Used for ungetc() style functionality. Possible values
 430              are an unsigned char, EOF, or EOF - 1 used to mark the
 431              field as not valid.  */
 432           int last_char;
 433           char nml_delim;
 434
 435           int repeat_count;
 436           int saved_length;
 437           int saved_used;
 438           bt saved_type;
 439           char *saved_string;
 440           char *scratch;
 441           char *line_buffer;
 442           struct format_data *fmt;
 443           namelist_info *ionml;
 444           /* A flag used to identify when a non-standard expanded namelist read
 445              has occurred.  */
 446           int expanded_read;
 447           /* Storage area for values except for strings.  Must be
 448              large enough to hold a complex value (two reals) of the
 449              largest kind.  */
 450           char value[32];
 451           GFC_IO_INT size_used;
 452         } p;
 453       /* This pad size must be equal to the pad_size declared in
 454          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 455          must be smaller or equal to this array.  */
 456       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 457     } u;
 458   GFC_INTEGER_4 *id;
 459   GFC_IO_INT pos;
 460   CHARACTER1 (asynchronous);
 461   CHARACTER2 (blank);
 462   CHARACTER1 (decimal);
 463   CHARACTER2 (delim);
 464   CHARACTER1 (pad);
 465   CHARACTER2 (round);
 466   CHARACTER1 (sign);
 467 }
 468 st_parameter_dt;
 469
 470 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 471 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 472                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 473                                   ? 1 : -1];
 474
 475 #define IOPARM_WAIT_HAS_ID              (1 << 7)
 476
 477 typedef struct
 478 {
 479   st_parameter_common common;
 480   CHARACTER1 (id);
 481 }
 482 st_parameter_wait;
 483
 484
 485 #undef CHARACTER1
 486 #undef CHARACTER2
 487
 488 typedef struct
 489 {
 490   unit_access access;
 491   unit_action action;
 492   unit_blank blank;
 493   unit_delim delim;
 494   unit_form form;
 495   int is_notpadded;
 496   unit_position position;
 497   unit_status status;
 498   unit_pad pad;
 499   unit_convert convert;
 500   int has_recl;
 501   unit_decimal decimal;
 502   unit_encoding encoding;
 503   unit_round round;
 504   unit_sign sign;
 505   unit_async async;
 506 }
 507 unit_flags;
 508
 509
 510 typedef struct gfc_unit
 511 {
 512   int unit_number;
 513   stream *s;
 514
 515   /* Treap links.  */
 516   struct gfc_unit *left, *right;
 517   int priority;
 518
 519   int read_bad, current_record, saved_pos, previous_nonadvancing_write;
 520
 521   enum
 522   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 523   endfile;
 524
 525   unit_mode mode;
 526   unit_flags flags;
 527   unit_pad pad_status;
 528   unit_decimal decimal_status;
 529   unit_delim delim_status;
 530   unit_round round_status;
 531
 532   /* recl                 -- Record length of the file.
 533      last_record          -- Last record number read or written
 534      maxrec               -- Maximum record number in a direct access file
 535      bytes_left           -- Bytes left in current record.
 536      strm_pos             -- Current position in file for STREAM I/O.
 537      recl_subrecord       -- Maximum length for subrecord.
 538      bytes_left_subrecord -- Bytes left in current subrecord.  */
 539   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 540     recl_subrecord, bytes_left_subrecord;
 541
 542   /* Set to 1 if we have read a subrecord.  */
 543
 544   int continued;
 545
 546   __gthread_mutex_t lock;
 547   /* Number of threads waiting to acquire this unit's lock.
 548      When non-zero, close_unit doesn't only removes the unit
 549      from the UNIT_ROOT tree, but doesn't free it and the
 550      last of the waiting threads will do that.
 551      This must be either atomically increased/decreased, or
 552      always guarded by UNIT_LOCK.  */
 553   int waiting;
 554   /* Flag set by close_unit if the unit as been closed.
 555      Must be manipulated under unit's lock.  */
 556   int closed;
 557
 558   /* For traversing arrays */
 559   array_loop_spec *ls;
 560   int rank;
 561
 562   int file_len;
 563   char *file;
 564
 565   /* The format hash table.  */
 566   struct format_hash_entry format_hash_table[FORMAT_HASH_SIZE];
 567
 568   /* Formatting buffer.  */
 569   struct fbuf *fbuf;
 570 }
 571 gfc_unit;
 572
 573
 574 /* unit.c */
 575
 576 /* Maximum file offset, computed at library initialization time.  */
 577 extern gfc_offset max_offset;
 578 internal_proto(max_offset);
 579
 580 /* Unit tree root.  */
 581 extern gfc_unit *unit_root;
 582 internal_proto(unit_root);
 583
 584 extern __gthread_mutex_t unit_lock;
 585 internal_proto(unit_lock);
 586
 587 extern int close_unit (gfc_unit *);
 588 internal_proto(close_unit);
 589
 590 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 591 internal_proto(get_internal_unit);
 592
 593 extern void free_internal_unit (st_parameter_dt *);
 594 internal_proto(free_internal_unit);
 595
 596 extern gfc_unit *find_unit (int);
 597 internal_proto(find_unit);
 598
 599 extern gfc_unit *find_or_create_unit (int);
 600 internal_proto(find_or_create_unit);
 601
 602 extern gfc_unit *get_unit (st_parameter_dt *, int);
 603 internal_proto(get_unit);
 604
 605 extern void unlock_unit (gfc_unit *);
 606 internal_proto(unlock_unit);
 607
 608 extern void finish_last_advance_record (gfc_unit *u);
 609 internal_proto (finish_last_advance_record);
 610
 611 extern int unit_truncate (gfc_unit *, gfc_offset, st_parameter_common *);
 612 internal_proto (unit_truncate);
 613
 614 extern GFC_INTEGER_4 get_unique_unit_number (st_parameter_open *);
 615 internal_proto(get_unique_unit_number);
 616
 617 /* open.c */
 618
 619 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 620 internal_proto(new_unit);
 621
 622
 623 /* transfer.c */
 624
 625 #define SCRATCH_SIZE 300
 626
 627 extern const char *type_name (bt);
 628 internal_proto(type_name);
 629
 630 extern void * read_block_form (st_parameter_dt *, int *);
 631 internal_proto(read_block_form);
 632
 633 extern void * read_block_form4 (st_parameter_dt *, int *);
 634 internal_proto(read_block_form4);
 635
 636 extern void *write_block (st_parameter_dt *, int);
 637 internal_proto(write_block);
 638
 639 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *,
 640                                      int*);
 641 internal_proto(next_array_record);
 642
 643 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *,
 644                                   gfc_offset *);
 645 internal_proto(init_loop_spec);
 646
 647 extern void next_record (st_parameter_dt *, int);
 648 internal_proto(next_record);
 649
 650 extern void reverse_memcpy (void *, const void *, size_t);
 651 internal_proto (reverse_memcpy);
 652
 653 extern void st_wait (st_parameter_wait *);
 654 export_proto(st_wait);
 655
 656 extern void hit_eof (st_parameter_dt *);
 657 internal_proto(hit_eof);
 658
 659 /* read.c */
 660
 661 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 662 internal_proto(set_integer);
 663
 664 extern GFC_UINTEGER_LARGEST max_value (int, int);
 665 internal_proto(max_value);
 666
 667 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 668 internal_proto(convert_real);
 669
 670 extern int convert_infnan (st_parameter_dt *, void *, const char *, int);
 671 internal_proto(convert_infnan);
 672
 673 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 674 internal_proto(read_a);
 675
 676 extern void read_a_char4 (st_parameter_dt *, const fnode *, char *, int);
 677 internal_proto(read_a);
 678
 679 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 680 internal_proto(read_f);
 681
 682 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 683 internal_proto(read_l);
 684
 685 extern void read_x (st_parameter_dt *, int);
 686 internal_proto(read_x);
 687
 688 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 689 internal_proto(read_radix);
 690
 691 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 692 internal_proto(read_decimal);
 693
 694 /* list_read.c */
 695
 696 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 697                                  size_t);
 698 internal_proto(list_formatted_read);
 699
 700 extern void finish_list_read (st_parameter_dt *);
 701 internal_proto(finish_list_read);
 702
 703 extern void namelist_read (st_parameter_dt *);
 704 internal_proto(namelist_read);
 705
 706 extern void namelist_write (st_parameter_dt *);
 707 internal_proto(namelist_write);
 708
 709 /* write.c */
 710
 711 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 712 internal_proto(write_a);
 713
 714 extern void write_a_char4 (st_parameter_dt *, const fnode *, const char *, int);
 715 internal_proto(write_a_char4);
 716
 717 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 718 internal_proto(write_b);
 719
 720 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 721 internal_proto(write_d);
 722
 723 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 724 internal_proto(write_e);
 725
 726 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 727 internal_proto(write_en);
 728
 729 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 730 internal_proto(write_es);
 731
 732 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 733 internal_proto(write_f);
 734
 735 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 736 internal_proto(write_i);
 737
 738 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 739 internal_proto(write_l);
 740
 741 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 742 internal_proto(write_o);
 743
 744 extern void write_real (st_parameter_dt *, const char *, int);
 745 internal_proto(write_real);
 746
 747 extern void write_real_g0 (st_parameter_dt *, const char *, int, int);
 748 internal_proto(write_real_g0);
 749
 750 extern void write_x (st_parameter_dt *, int, int);
 751 internal_proto(write_x);
 752
 753 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 754 internal_proto(write_z);
 755
 756 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 757                                   size_t);
 758 internal_proto(list_formatted_write);
 759
 760 /* size_from_kind.c */
 761 extern size_t size_from_real_kind (int);
 762 internal_proto(size_from_real_kind);
 763
 764 extern size_t size_from_complex_kind (int);
 765 internal_proto(size_from_complex_kind);
 766
 767
 768 /* lock.c */
 769 extern void free_ionml (st_parameter_dt *);
 770 internal_proto(free_ionml);
 771
 772 static inline void
 773 inc_waiting_locked (gfc_unit *u)
 774 {
 775 #ifdef HAVE_SYNC_FETCH_AND_ADD
 776   (void) __sync_fetch_and_add (&u->waiting, 1);
 777 #else
 778   u->waiting++;
 779 #endif
 780 }
 781
 782 static inline int
 783 predec_waiting_locked (gfc_unit *u)
 784 {
 785 #ifdef HAVE_SYNC_FETCH_AND_ADD
 786   return __sync_add_and_fetch (&u->waiting, -1);
 787 #else
 788   return --u->waiting;
 789 #endif
 790 }
 791
 792 static inline void
 793 dec_waiting_unlocked (gfc_unit *u)
 794 {
 795 #ifdef HAVE_SYNC_FETCH_AND_ADD
 796   (void) __sync_fetch_and_add (&u->waiting, -1);
 797 #else
 798   __gthread_mutex_lock (&unit_lock);
 799   u->waiting--;
 800   __gthread_mutex_unlock (&unit_lock);
 801 #endif
 802 }
 803
 804
 805 static inline void
 806 memset4 (gfc_char4_t *p, gfc_char4_t c, int k)
 807 {
 808   int j;
 809   for (j = 0; j < k; j++)
 810     *p++ = c;
 811 }
 812
 813 #endif
 814