libgfortran/io/io.h

   1 /* Copyright (C) 2002-2014 Free Software Foundation, Inc.
   2    Contributed by Andy Vaught
   3    F2003 I/O support contributed by Jerry DeLisle
   4
   5 This file is part of the GNU Fortran 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 3, 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 Under Section 7 of GPL version 3, you are granted additional
  18 permissions described in the GCC Runtime Library Exception, version
  19 3.1, as published by the Free Software Foundation.
  20
  21 You should have received a copy of the GNU General Public License and
  22 a copy of the GCC Runtime Library Exception along with this program;
  23 see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  24 <http://www.gnu.org/licenses/>.  */
  25
  26 #ifndef GFOR_IO_H
  27 #define GFOR_IO_H
  28
  29 /* IO library include.  */
  30
  31 #include "libgfortran.h"
  32
  33 #include <gthr.h>
  34
  35 /* Forward declarations.  */
  36 struct st_parameter_dt;
  37 typedef struct stream stream;
  38 struct fbuf;
  39 struct format_data;
  40 typedef struct fnode fnode;
  41 struct gfc_unit;
  42
  43
  44 /* Macros for testing what kinds of I/O we are doing.  */
  45
  46 #define is_array_io(dtp) ((dtp)->internal_unit_desc)
  47
  48 #define is_internal_unit(dtp) ((dtp)->u.p.unit_is_internal)
  49
  50 #define is_stream_io(dtp) ((dtp)->u.p.current_unit->flags.access == ACCESS_STREAM)
  51
  52 #define is_char4_unit(dtp) ((dtp)->u.p.unit_is_internal && (dtp)->common.unit)
  53
  54 /* The array_loop_spec contains the variables for the loops over index ranges
  55    that are encountered.  */
  56
  57 typedef struct array_loop_spec
  58 {
  59   /* Index counter for this dimension.  */
  60   index_type idx;
  61
  62   /* Start for the index counter.  */
  63   index_type start;
  64
  65   /* End for the index counter.  */
  66   index_type end;
  67
  68   /* Step for the index counter.  */
  69   index_type step;
  70 }
  71 array_loop_spec;
  72
  73 /* A structure to build a hash table for format data.  */
  74
  75 #define FORMAT_HASH_SIZE 16
  76
  77 typedef struct format_hash_entry
  78 {
  79   char *key;
  80   gfc_charlen_type key_len;
  81   struct format_data *hashed_fmt;
  82 }
  83 format_hash_entry;
  84
  85 /* Representation of a namelist object in libgfortran
  86
  87    Namelist Records
  88       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
  89      or
  90       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
  91
  92    The object can be a fully qualified, compound name for an intrinsic
  93    type, derived types or derived type components.  So, a substring
  94    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
  95    read. Hence full information about the structure of the object has
  96    to be available to list_read.c and write.
  97
  98    These requirements are met by the following data structures.
  99
 100    namelist_info type contains all the scalar information about the
 101    object and arrays of descriptor_dimension and array_loop_spec types for
 102    arrays.  */
 103
 104 typedef struct namelist_type
 105 {
 106   /* Object type.  */
 107   bt type;
 108
 109   /* Object name.  */
 110   char * var_name;
 111
 112   /* Address for the start of the object's data.  */
 113   void * mem_pos;
 114
 115   /* Flag to show that a read is to be attempted for this node.  */
 116   int touched;
 117
 118   /* Length of intrinsic type in bytes.  */
 119   int len;
 120
 121   /* Rank of the object.  */
 122   int var_rank;
 123
 124   /* Overall size of the object in bytes.  */
 125   index_type size;
 126
 127   /* Length of character string.  */
 128   index_type string_length;
 129
 130   descriptor_dimension * dim;
 131   array_loop_spec * ls;
 132   struct namelist_type * next;
 133 }
 134 namelist_info;
 135
 136 /* Options for the OPEN statement.  */
 137
 138 typedef enum
 139 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 140   ACCESS_UNSPECIFIED
 141 }
 142 unit_access;
 143
 144 typedef enum
 145 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 146   ACTION_UNSPECIFIED
 147 }
 148 unit_action;
 149
 150 typedef enum
 151 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 152 unit_blank;
 153
 154 typedef enum
 155 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 156   DELIM_UNSPECIFIED
 157 }
 158 unit_delim;
 159
 160 typedef enum
 161 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 162 unit_form;
 163
 164 typedef enum
 165 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 166   POSITION_UNSPECIFIED
 167 }
 168 unit_position;
 169
 170 typedef enum
 171 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 172   STATUS_REPLACE, STATUS_UNSPECIFIED
 173 }
 174 unit_status;
 175
 176 typedef enum
 177 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 178 unit_pad;
 179
 180 typedef enum
 181 { DECIMAL_POINT, DECIMAL_COMMA, DECIMAL_UNSPECIFIED }
 182 unit_decimal;
 183
 184 typedef enum
 185 { ENCODING_UTF8, ENCODING_DEFAULT, ENCODING_UNSPECIFIED }
 186 unit_encoding;
 187
 188 typedef enum
 189 { ROUND_UP = GFC_FPE_UPWARD,
 190   ROUND_DOWN = GFC_FPE_DOWNWARD,
 191   ROUND_ZERO = GFC_FPE_TOWARDZERO,
 192   ROUND_NEAREST = GFC_FPE_TONEAREST,
 193   ROUND_COMPATIBLE = 10, /* round away from zero.  */
 194   ROUND_PROCDEFINED, /* Here as ROUND_NEAREST. */
 195   ROUND_UNSPECIFIED /* Should never occur. */
 196 }
 197 unit_round;
 198
 199 /* NOTE: unit_sign must correspond with the sign_status enumerator in
 200    st_parameter_dt to not break the ABI.  */
 201 typedef enum
 202 { SIGN_PROCDEFINED, SIGN_SUPPRESS, SIGN_PLUS, SIGN_UNSPECIFIED }
 203 unit_sign;
 204
 205 typedef enum
 206 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 207 unit_advance;
 208
 209 typedef enum
 210 {READING, WRITING}
 211 unit_mode;
 212
 213 typedef enum
 214 { ASYNC_YES, ASYNC_NO, ASYNC_UNSPECIFIED }
 215 unit_async;
 216
 217 typedef enum
 218 { SIGN_S, SIGN_SS, SIGN_SP }
 219 unit_sign_s;
 220
 221 #define CHARACTER1(name) \
 222               char * name; \
 223               gfc_charlen_type name ## _len
 224 #define CHARACTER2(name) \
 225               gfc_charlen_type name ## _len; \
 226               char * name
 227
 228 typedef struct
 229 {
 230   st_parameter_common common;
 231   GFC_INTEGER_4 recl_in;
 232   CHARACTER2 (file);
 233   CHARACTER1 (status);
 234   CHARACTER2 (access);
 235   CHARACTER1 (form);
 236   CHARACTER2 (blank);
 237   CHARACTER1 (position);
 238   CHARACTER2 (action);
 239   CHARACTER1 (delim);
 240   CHARACTER2 (pad);
 241   CHARACTER1 (convert);
 242   CHARACTER2 (decimal);
 243   CHARACTER1 (encoding);
 244   CHARACTER2 (round);
 245   CHARACTER1 (sign);
 246   CHARACTER2 (asynchronous);
 247   GFC_INTEGER_4 *newunit;
 248 }
 249 st_parameter_open;
 250
 251 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 252
 253 typedef struct
 254 {
 255   st_parameter_common common;
 256   CHARACTER1 (status);
 257 }
 258 st_parameter_close;
 259
 260 typedef struct
 261 {
 262   st_parameter_common common;
 263 }
 264 st_parameter_filepos;
 265
 266 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 267 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 268 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 269 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 270 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 271 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 272 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 273 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 274 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 275 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 276 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 277 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 278 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 279 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 280 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 281 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 282 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 283 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 284 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 285 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 286 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 287 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 288 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 289 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 290 #define IOPARM_INQUIRE_HAS_FLAGS2       (1 << 31)
 291
 292 #define IOPARM_INQUIRE_HAS_ASYNCHRONOUS (1 << 0)
 293 #define IOPARM_INQUIRE_HAS_DECIMAL      (1 << 1)
 294 #define IOPARM_INQUIRE_HAS_ENCODING     (1 << 2)
 295 #define IOPARM_INQUIRE_HAS_ROUND        (1 << 3)
 296 #define IOPARM_INQUIRE_HAS_SIGN         (1 << 4)
 297 #define IOPARM_INQUIRE_HAS_PENDING      (1 << 5)
 298 #define IOPARM_INQUIRE_HAS_SIZE         (1 << 6)
 299 #define IOPARM_INQUIRE_HAS_ID           (1 << 7)
 300 #define IOPARM_INQUIRE_HAS_IQSTREAM     (1 << 8)
 301
 302 typedef struct
 303 {
 304   st_parameter_common common;
 305   GFC_INTEGER_4 *exist, *opened, *number, *named;
 306   GFC_INTEGER_4 *nextrec, *recl_out;
 307   GFC_IO_INT *strm_pos_out;
 308   CHARACTER1 (file);
 309   CHARACTER2 (access);
 310   CHARACTER1 (form);
 311   CHARACTER2 (blank);
 312   CHARACTER1 (position);
 313   CHARACTER2 (action);
 314   CHARACTER1 (delim);
 315   CHARACTER2 (pad);
 316   CHARACTER1 (name);
 317   CHARACTER2 (sequential);
 318   CHARACTER1 (direct);
 319   CHARACTER2 (formatted);
 320   CHARACTER1 (unformatted);
 321   CHARACTER2 (read);
 322   CHARACTER1 (write);
 323   CHARACTER2 (readwrite);
 324   CHARACTER1 (convert);
 325   GFC_INTEGER_4 flags2;
 326   CHARACTER1 (asynchronous);
 327   CHARACTER2 (decimal);
 328   CHARACTER1 (encoding);
 329   CHARACTER2 (round);
 330   CHARACTER1 (sign);
 331   GFC_INTEGER_4 *pending;
 332   GFC_IO_INT *size;
 333   GFC_INTEGER_4 *id;
 334   CHARACTER1 (iqstream);
 335 }
 336 st_parameter_inquire;
 337
 338
 339 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 340 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 341 #define IOPARM_DT_HAS_REC                       (1 << 9)
 342 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 343 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 344 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 345 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 346 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 347 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 348 #define IOPARM_DT_HAS_ID                        (1 << 16)
 349 #define IOPARM_DT_HAS_POS                       (1 << 17)
 350 #define IOPARM_DT_HAS_ASYNCHRONOUS              (1 << 18)
 351 #define IOPARM_DT_HAS_BLANK                     (1 << 19)
 352 #define IOPARM_DT_HAS_DECIMAL                   (1 << 20)
 353 #define IOPARM_DT_HAS_DELIM                     (1 << 21)
 354 #define IOPARM_DT_HAS_PAD                       (1 << 22)
 355 #define IOPARM_DT_HAS_ROUND                     (1 << 23)
 356 #define IOPARM_DT_HAS_SIGN                      (1 << 24)
 357 #define IOPARM_DT_HAS_F2003                     (1 << 25)
 358 /* Internal use bit.  */
 359 #define IOPARM_DT_IONML_SET                     (1 << 31)
 360
 361
 362 typedef struct st_parameter_dt
 363 {
 364   st_parameter_common common;
 365   GFC_IO_INT rec;
 366   GFC_IO_INT *size, *iolength;
 367   gfc_array_char *internal_unit_desc;
 368   CHARACTER1 (format);
 369   CHARACTER2 (advance);
 370   CHARACTER1 (internal_unit);
 371   CHARACTER2 (namelist_name);
 372   /* Private part of the structure.  The compiler just needs
 373      to reserve enough space.  */
 374   union
 375     {
 376       struct
 377         {
 378           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 379                             size_t, size_t);
 380           struct gfc_unit *current_unit;
 381           /* Item number in a formatted data transfer.  Also used in namelist
 382              read_logical as an index into line_buffer.  */
 383           int item_count;
 384           unit_mode mode;
 385           unit_blank blank_status;
 386           unit_sign sign_status;
 387           int scale_factor;
 388           int max_pos; /* Maximum righthand column written to.  */
 389           /* Number of skips + spaces to be done for T and X-editing.  */
 390           int skips;
 391           /* Number of spaces to be done for T and X-editing.  */
 392           int pending_spaces;
 393           /* Whether an EOR condition was encountered. Value is:
 394                0 if no EOR was encountered
 395                1 if an EOR was encountered due to a 1-byte marker (LF)
 396                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 397           int sf_seen_eor;
 398           unit_advance advance_status;
 399           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 400           unsigned first_item : 1;
 401           unsigned seen_dollar : 1;
 402           unsigned eor_condition : 1;
 403           unsigned no_leading_blank : 1;
 404           unsigned char_flag : 1;
 405           unsigned input_complete : 1;
 406           unsigned at_eol : 1;
 407           unsigned comma_flag : 1;
 408           /* A namelist specific flag used in the list directed library
 409              to flag that calls are being made from namelist read (e.g. to
 410              ignore comments or to treat '/' as a terminator)  */
 411           unsigned namelist_mode : 1;
 412           /* A namelist specific flag used in the list directed library
 413              to flag read errors and return, so that an attempt can be
 414              made to read a new object name.  */
 415           unsigned nml_read_error : 1;
 416           /* A sequential formatted read specific flag used to signal that a
 417              character string is being read so don't use commas to shorten a
 418              formatted field width.  */
 419           unsigned sf_read_comma : 1;
 420           /* A namelist specific flag used to enable reading input from
 421              line_buffer for logical reads.  */
 422           unsigned line_buffer_enabled : 1;
 423           /* An internal unit specific flag used to identify that the associated
 424              unit is internal.  */
 425           unsigned unit_is_internal : 1;
 426           /* An internal unit specific flag to signify an EOF condition for list
 427              directed read.  */
 428           unsigned at_eof : 1;
 429           /* Used for g0 floating point output.  */
 430           unsigned g0_no_blanks : 1;
 431           /* Used to signal use of free_format_data.  */
 432           unsigned format_not_saved : 1;
 433           /* A flag used to identify when a non-standard expanded namelist read
 434              has occurred.  */
 435           unsigned expanded_read : 1;
 436           /* 13 unused bits.  */
 437
 438           /* Used for ungetc() style functionality. Possible values
 439              are an unsigned char, EOF, or EOF - 1 used to mark the
 440              field as not valid.  */
 441           int last_char;
 442           char nml_delim;
 443
 444           int repeat_count;
 445           int saved_length;
 446           int saved_used;
 447           bt saved_type;
 448           char *saved_string;
 449           char *scratch;
 450           char *line_buffer;
 451           struct format_data *fmt;
 452           namelist_info *ionml;
 453           /* Current position within the look-ahead line buffer.  */
 454           int line_buffer_pos;
 455           /* Storage area for values except for strings.  Must be
 456              large enough to hold a complex value (two reals) of the
 457              largest kind.  */
 458           char value[32];
 459           GFC_IO_INT size_used;
 460         } p;
 461       /* This pad size must be equal to the pad_size declared in
 462          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 463          must be smaller or equal to this array.  */
 464       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 465     } u;
 466   GFC_INTEGER_4 *id;
 467   GFC_IO_INT pos;
 468   CHARACTER1 (asynchronous);
 469   CHARACTER2 (blank);
 470   CHARACTER1 (decimal);
 471   CHARACTER2 (delim);
 472   CHARACTER1 (pad);
 473   CHARACTER2 (round);
 474   CHARACTER1 (sign);
 475 }
 476 st_parameter_dt;
 477
 478 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 479 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 480                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 481                                   ? 1 : -1];
 482
 483 #define IOPARM_WAIT_HAS_ID              (1 << 7)
 484
 485 typedef struct
 486 {
 487   st_parameter_common common;
 488   CHARACTER1 (id);
 489 }
 490 st_parameter_wait;
 491
 492
 493 #undef CHARACTER1
 494 #undef CHARACTER2
 495
 496 typedef struct
 497 {
 498   unit_access access;
 499   unit_action action;
 500   unit_blank blank;
 501   unit_delim delim;
 502   unit_form form;
 503   int is_notpadded;
 504   unit_position position;
 505   unit_status status;
 506   unit_pad pad;
 507   unit_convert convert;
 508   int has_recl;
 509   unit_decimal decimal;
 510   unit_encoding encoding;
 511   unit_round round;
 512   unit_sign sign;
 513   unit_async async;
 514 }
 515 unit_flags;
 516
 517
 518 typedef struct gfc_unit
 519 {
 520   int unit_number;
 521   stream *s;
 522
 523   /* Treap links.  */
 524   struct gfc_unit *left, *right;
 525   int priority;
 526
 527   int read_bad, current_record, saved_pos, previous_nonadvancing_write;
 528
 529   enum
 530   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 531   endfile;
 532
 533   unit_mode mode;
 534   unit_flags flags;
 535   unit_pad pad_status;
 536   unit_decimal decimal_status;
 537   unit_delim delim_status;
 538   unit_round round_status;
 539
 540   /* recl                 -- Record length of the file.
 541      last_record          -- Last record number read or written
 542      maxrec               -- Maximum record number in a direct access file
 543      bytes_left           -- Bytes left in current record.
 544      strm_pos             -- Current position in file for STREAM I/O.
 545      recl_subrecord       -- Maximum length for subrecord.
 546      bytes_left_subrecord -- Bytes left in current subrecord.  */
 547   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 548     recl_subrecord, bytes_left_subrecord;
 549
 550   /* Set to 1 if we have read a subrecord.  */
 551
 552   int continued;
 553
 554   __gthread_mutex_t lock;
 555   /* Number of threads waiting to acquire this unit's lock.
 556      When non-zero, close_unit doesn't only removes the unit
 557      from the UNIT_ROOT tree, but doesn't free it and the
 558      last of the waiting threads will do that.
 559      This must be either atomically increased/decreased, or
 560      always guarded by UNIT_LOCK.  */
 561   int waiting;
 562   /* Flag set by close_unit if the unit as been closed.
 563      Must be manipulated under unit's lock.  */
 564   int closed;
 565
 566   /* For traversing arrays */
 567   array_loop_spec *ls;
 568   int rank;
 569
 570   /* Name of the file at the time OPEN was executed, as a
 571      null-terminated C string.  */
 572   char *filename;
 573
 574   /* The format hash table.  */
 575   struct format_hash_entry format_hash_table[FORMAT_HASH_SIZE];
 576
 577   /* Formatting buffer.  */
 578   struct fbuf *fbuf;
 579
 580   /* Function pointer, points to list_read worker functions.  */
 581   int (*next_char_fn_ptr) (st_parameter_dt *);
 582   void (*push_char_fn_ptr) (st_parameter_dt *, int);
 583 }
 584 gfc_unit;
 585
 586
 587 /* unit.c */
 588
 589 /* Maximum file offset, computed at library initialization time.  */
 590 extern gfc_offset max_offset;
 591 internal_proto(max_offset);
 592
 593 /* Unit tree root.  */
 594 extern gfc_unit *unit_root;
 595 internal_proto(unit_root);
 596
 597 extern __gthread_mutex_t unit_lock;
 598 internal_proto(unit_lock);
 599
 600 extern int close_unit (gfc_unit *);
 601 internal_proto(close_unit);
 602
 603 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 604 internal_proto(get_internal_unit);
 605
 606 extern void free_internal_unit (st_parameter_dt *);
 607 internal_proto(free_internal_unit);
 608
 609 extern gfc_unit *find_unit (int);
 610 internal_proto(find_unit);
 611
 612 extern gfc_unit *find_or_create_unit (int);
 613 internal_proto(find_or_create_unit);
 614
 615 extern gfc_unit *get_unit (st_parameter_dt *, int);
 616 internal_proto(get_unit);
 617
 618 extern void unlock_unit (gfc_unit *);
 619 internal_proto(unlock_unit);
 620
 621 extern void finish_last_advance_record (gfc_unit *u);
 622 internal_proto (finish_last_advance_record);
 623
 624 extern int unit_truncate (gfc_unit *, gfc_offset, st_parameter_common *);
 625 internal_proto (unit_truncate);
 626
 627 extern GFC_INTEGER_4 get_unique_unit_number (st_parameter_open *);
 628 internal_proto(get_unique_unit_number);
 629
 630 /* open.c */
 631
 632 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 633 internal_proto(new_unit);
 634
 635
 636 /* transfer.c */
 637
 638 #define SCRATCH_SIZE 300
 639
 640 extern const char *type_name (bt);
 641 internal_proto(type_name);
 642
 643 extern void * read_block_form (st_parameter_dt *, int *);
 644 internal_proto(read_block_form);
 645
 646 extern void * read_block_form4 (st_parameter_dt *, int *);
 647 internal_proto(read_block_form4);
 648
 649 extern void *write_block (st_parameter_dt *, int);
 650 internal_proto(write_block);
 651
 652 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *,
 653                                      int*);
 654 internal_proto(next_array_record);
 655
 656 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *,
 657                                   gfc_offset *);
 658 internal_proto(init_loop_spec);
 659
 660 extern void next_record (st_parameter_dt *, int);
 661 internal_proto(next_record);
 662
 663 extern void st_wait (st_parameter_wait *);
 664 export_proto(st_wait);
 665
 666 extern void hit_eof (st_parameter_dt *);
 667 internal_proto(hit_eof);
 668
 669 /* read.c */
 670
 671 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 672 internal_proto(set_integer);
 673
 674 extern GFC_UINTEGER_LARGEST si_max (int);
 675 internal_proto(si_max);
 676
 677 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 678 internal_proto(convert_real);
 679
 680 extern int convert_infnan (st_parameter_dt *, void *, const char *, int);
 681 internal_proto(convert_infnan);
 682
 683 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 684 internal_proto(read_a);
 685
 686 extern void read_a_char4 (st_parameter_dt *, const fnode *, char *, int);
 687 internal_proto(read_a);
 688
 689 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 690 internal_proto(read_f);
 691
 692 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 693 internal_proto(read_l);
 694
 695 extern void read_x (st_parameter_dt *, int);
 696 internal_proto(read_x);
 697
 698 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 699 internal_proto(read_radix);
 700
 701 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 702 internal_proto(read_decimal);
 703
 704 /* list_read.c */
 705
 706 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 707                                  size_t);
 708 internal_proto(list_formatted_read);
 709
 710 extern void finish_list_read (st_parameter_dt *);
 711 internal_proto(finish_list_read);
 712
 713 extern void namelist_read (st_parameter_dt *);
 714 internal_proto(namelist_read);
 715
 716 extern void namelist_write (st_parameter_dt *);
 717 internal_proto(namelist_write);
 718
 719 /* write.c */
 720
 721 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 722 internal_proto(write_a);
 723
 724 extern void write_a_char4 (st_parameter_dt *, const fnode *, const char *, int);
 725 internal_proto(write_a_char4);
 726
 727 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 728 internal_proto(write_b);
 729
 730 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 731 internal_proto(write_d);
 732
 733 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 734 internal_proto(write_e);
 735
 736 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 737 internal_proto(write_en);
 738
 739 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 740 internal_proto(write_es);
 741
 742 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 743 internal_proto(write_f);
 744
 745 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 746 internal_proto(write_i);
 747
 748 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 749 internal_proto(write_l);
 750
 751 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 752 internal_proto(write_o);
 753
 754 extern void write_real (st_parameter_dt *, const char *, int);
 755 internal_proto(write_real);
 756
 757 extern void write_real_g0 (st_parameter_dt *, const char *, int, int);
 758 internal_proto(write_real_g0);
 759
 760 extern void write_x (st_parameter_dt *, int, int);
 761 internal_proto(write_x);
 762
 763 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 764 internal_proto(write_z);
 765
 766 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 767                                   size_t);
 768 internal_proto(list_formatted_write);
 769
 770 /* size_from_kind.c */
 771 extern size_t size_from_real_kind (int);
 772 internal_proto(size_from_real_kind);
 773
 774 extern size_t size_from_complex_kind (int);
 775 internal_proto(size_from_complex_kind);
 776
 777
 778 /* lock.c */
 779 extern void free_ionml (st_parameter_dt *);
 780 internal_proto(free_ionml);
 781
 782 static inline void
 783 inc_waiting_locked (gfc_unit *u)
 784 {
 785 #ifdef HAVE_SYNC_FETCH_AND_ADD
 786   (void) __sync_fetch_and_add (&u->waiting, 1);
 787 #else
 788   u->waiting++;
 789 #endif
 790 }
 791
 792 static inline int
 793 predec_waiting_locked (gfc_unit *u)
 794 {
 795 #ifdef HAVE_SYNC_FETCH_AND_ADD
 796   return __sync_add_and_fetch (&u->waiting, -1);
 797 #else
 798   return --u->waiting;
 799 #endif
 800 }
 801
 802 static inline void
 803 dec_waiting_unlocked (gfc_unit *u)
 804 {
 805 #ifdef HAVE_SYNC_FETCH_AND_ADD
 806   (void) __sync_fetch_and_add (&u->waiting, -1);
 807 #else
 808   __gthread_mutex_lock (&unit_lock);
 809   u->waiting--;
 810   __gthread_mutex_unlock (&unit_lock);
 811 #endif
 812 }
 813
 814
 815 static inline void
 816 memset4 (gfc_char4_t *p, gfc_char4_t c, int k)
 817 {
 818   int j;
 819   for (j = 0; j < k; j++)
 820     *p++ = c;
 821 }
 822
 823 #endif
 824