libgfortran/io/io.h

   1 /* Copyright (C) 2002-2013 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           /* 14 unused bits.  */
 434
 435           /* Used for ungetc() style functionality. Possible values
 436              are an unsigned char, EOF, or EOF - 1 used to mark the
 437              field as not valid.  */
 438           int last_char;
 439           char nml_delim;
 440
 441           int repeat_count;
 442           int saved_length;
 443           int saved_used;
 444           bt saved_type;
 445           char *saved_string;
 446           char *scratch;
 447           char *line_buffer;
 448           struct format_data *fmt;
 449           namelist_info *ionml;
 450           /* A flag used to identify when a non-standard expanded namelist read
 451              has occurred.  */
 452           int expanded_read;
 453           /* Storage area for values except for strings.  Must be
 454              large enough to hold a complex value (two reals) of the
 455              largest kind.  */
 456           char value[32];
 457           GFC_IO_INT size_used;
 458         } p;
 459       /* This pad size must be equal to the pad_size declared in
 460          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 461          must be smaller or equal to this array.  */
 462       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 463     } u;
 464   GFC_INTEGER_4 *id;
 465   GFC_IO_INT pos;
 466   CHARACTER1 (asynchronous);
 467   CHARACTER2 (blank);
 468   CHARACTER1 (decimal);
 469   CHARACTER2 (delim);
 470   CHARACTER1 (pad);
 471   CHARACTER2 (round);
 472   CHARACTER1 (sign);
 473 }
 474 st_parameter_dt;
 475
 476 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 477 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 478                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 479                                   ? 1 : -1];
 480
 481 #define IOPARM_WAIT_HAS_ID              (1 << 7)
 482
 483 typedef struct
 484 {
 485   st_parameter_common common;
 486   CHARACTER1 (id);
 487 }
 488 st_parameter_wait;
 489
 490
 491 #undef CHARACTER1
 492 #undef CHARACTER2
 493
 494 typedef struct
 495 {
 496   unit_access access;
 497   unit_action action;
 498   unit_blank blank;
 499   unit_delim delim;
 500   unit_form form;
 501   int is_notpadded;
 502   unit_position position;
 503   unit_status status;
 504   unit_pad pad;
 505   unit_convert convert;
 506   int has_recl;
 507   unit_decimal decimal;
 508   unit_encoding encoding;
 509   unit_round round;
 510   unit_sign sign;
 511   unit_async async;
 512 }
 513 unit_flags;
 514
 515
 516 typedef struct gfc_unit
 517 {
 518   int unit_number;
 519   stream *s;
 520
 521   /* Treap links.  */
 522   struct gfc_unit *left, *right;
 523   int priority;
 524
 525   int read_bad, current_record, saved_pos, previous_nonadvancing_write;
 526
 527   enum
 528   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 529   endfile;
 530
 531   unit_mode mode;
 532   unit_flags flags;
 533   unit_pad pad_status;
 534   unit_decimal decimal_status;
 535   unit_delim delim_status;
 536   unit_round round_status;
 537
 538   /* recl                 -- Record length of the file.
 539      last_record          -- Last record number read or written
 540      maxrec               -- Maximum record number in a direct access file
 541      bytes_left           -- Bytes left in current record.
 542      strm_pos             -- Current position in file for STREAM I/O.
 543      recl_subrecord       -- Maximum length for subrecord.
 544      bytes_left_subrecord -- Bytes left in current subrecord.  */
 545   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos,
 546     recl_subrecord, bytes_left_subrecord;
 547
 548   /* Set to 1 if we have read a subrecord.  */
 549
 550   int continued;
 551
 552   __gthread_mutex_t lock;
 553   /* Number of threads waiting to acquire this unit's lock.
 554      When non-zero, close_unit doesn't only removes the unit
 555      from the UNIT_ROOT tree, but doesn't free it and the
 556      last of the waiting threads will do that.
 557      This must be either atomically increased/decreased, or
 558      always guarded by UNIT_LOCK.  */
 559   int waiting;
 560   /* Flag set by close_unit if the unit as been closed.
 561      Must be manipulated under unit's lock.  */
 562   int closed;
 563
 564   /* For traversing arrays */
 565   array_loop_spec *ls;
 566   int rank;
 567
 568   int file_len;
 569   char *file;
 570
 571   /* The format hash table.  */
 572   struct format_hash_entry format_hash_table[FORMAT_HASH_SIZE];
 573
 574   /* Formatting buffer.  */
 575   struct fbuf *fbuf;
 576 }
 577 gfc_unit;
 578
 579
 580 /* unit.c */
 581
 582 /* Maximum file offset, computed at library initialization time.  */
 583 extern gfc_offset max_offset;
 584 internal_proto(max_offset);
 585
 586 /* Unit tree root.  */
 587 extern gfc_unit *unit_root;
 588 internal_proto(unit_root);
 589
 590 extern __gthread_mutex_t unit_lock;
 591 internal_proto(unit_lock);
 592
 593 extern int close_unit (gfc_unit *);
 594 internal_proto(close_unit);
 595
 596 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 597 internal_proto(get_internal_unit);
 598
 599 extern void free_internal_unit (st_parameter_dt *);
 600 internal_proto(free_internal_unit);
 601
 602 extern gfc_unit *find_unit (int);
 603 internal_proto(find_unit);
 604
 605 extern gfc_unit *find_or_create_unit (int);
 606 internal_proto(find_or_create_unit);
 607
 608 extern gfc_unit *get_unit (st_parameter_dt *, int);
 609 internal_proto(get_unit);
 610
 611 extern void unlock_unit (gfc_unit *);
 612 internal_proto(unlock_unit);
 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 st_wait (st_parameter_wait *);
 657 export_proto(st_wait);
 658
 659 extern void hit_eof (st_parameter_dt *);
 660 internal_proto(hit_eof);
 661
 662 /* read.c */
 663
 664 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 665 internal_proto(set_integer);
 666
 667 extern GFC_UINTEGER_LARGEST si_max (int);
 668 internal_proto(si_max);
 669
 670 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 671 internal_proto(convert_real);
 672
 673 extern int convert_infnan (st_parameter_dt *, void *, const char *, int);
 674 internal_proto(convert_infnan);
 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
 808 static inline void
 809 memset4 (gfc_char4_t *p, gfc_char4_t c, int k)
 810 {
 811   int j;
 812   for (j = 0; j < k; j++)
 813     *p++ = c;
 814 }
 815
 816 #endif
 817