libgfortran/io/io.h

   1 /* Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
   2    Contributed by Andy Vaught
   3
   4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
   5
   6 Libgfortran is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 Libgfortran is distributed in the hope that it will be useful,
  12 but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 GNU General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with Libgfortran; see the file COPYING.  If not, write to
  18 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  19 Boston, MA 02110-1301, USA.  */
  20
  21 /* As a special exception, if you link this library with other files,
  22    some of which are compiled with GCC, to produce an executable,
  23    this library does not by itself cause the resulting executable
  24    to be covered by the GNU General Public License.
  25    This exception does not however invalidate any other reasons why
  26    the executable file might be covered by the GNU General Public License.  */
  27
  28 #ifndef GFOR_IO_H
  29 #define GFOR_IO_H
  30
  31 /* IO library include.  */
  32
  33 #include <setjmp.h>
  34 #include "libgfortran.h"
  35
  36 #include <gthr.h>
  37
  38 #define DEFAULT_TEMPDIR "/tmp"
  39
  40 /* Basic types used in data transfers.  */
  41
  42 typedef enum
  43 { BT_NULL, BT_INTEGER, BT_LOGICAL, BT_CHARACTER, BT_REAL,
  44   BT_COMPLEX
  45 }
  46 bt;
  47
  48
  49 struct st_parameter_dt;
  50
  51 typedef struct stream
  52 {
  53   char *(*alloc_w_at) (struct stream *, int *, gfc_offset);
  54   char *(*alloc_r_at) (struct stream *, int *, gfc_offset);
  55   try (*sfree) (struct stream *);
  56   try (*close) (struct stream *);
  57   try (*seek) (struct stream *, gfc_offset);
  58   try (*truncate) (struct stream *);
  59   int (*read) (struct stream *, void *, size_t *);
  60   int (*write) (struct stream *, const void *, size_t *);
  61   try (*set) (struct stream *, int, size_t);
  62 }
  63 stream;
  64
  65
  66 /* Macros for doing file I/O given a stream.  */
  67
  68 #define sfree(s) ((s)->sfree)(s)
  69 #define sclose(s) ((s)->close)(s)
  70
  71 #define salloc_r(s, len) ((s)->alloc_r_at)(s, len, -1)
  72 #define salloc_w(s, len) ((s)->alloc_w_at)(s, len, -1)
  73
  74 #define salloc_r_at(s, len, where) ((s)->alloc_r_at)(s, len, where)
  75 #define salloc_w_at(s, len, where) ((s)->alloc_w_at)(s, len, where)
  76
  77 #define sseek(s, pos) ((s)->seek)(s, pos)
  78 #define struncate(s) ((s)->truncate)(s)
  79 #define sread(s, buf, nbytes) ((s)->read)(s, buf, nbytes)
  80 #define swrite(s, buf, nbytes) ((s)->write)(s, buf, nbytes)
  81
  82 #define sset(s, c, n) ((s)->set)(s, c, n)
  83
  84 /* The array_loop_spec contains the variables for the loops over index ranges
  85    that are encountered.  Since the variables can be negative, ssize_t
  86    is used.  */
  87
  88 typedef struct array_loop_spec
  89 {
  90   /* Index counter for this dimension.  */
  91   ssize_t idx;
  92
  93   /* Start for the index counter.  */
  94   ssize_t start;
  95
  96   /* End for the index counter.  */
  97   ssize_t end;
  98
  99   /* Step for the index counter.  */
 100   ssize_t step;
 101 }
 102 array_loop_spec;
 103
 104 /* Representation of a namelist object in libgfortran
 105
 106    Namelist Records
 107       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]].../
 108      or
 109       &GROUPNAME  OBJECT=value[s] [,OBJECT=value[s]]...&END
 110
 111    The object can be a fully qualified, compound name for an instrinsic
 112    type, derived types or derived type components.  So, a substring
 113    a(:)%b(4)%ch(2:4)(1:7) has to be treated correctly in namelist
 114    read. Hence full information about the structure of the object has
 115    to be available to list_read.c and write.
 116
 117    These requirements are met by the following data structures.
 118
 119    namelist_info type contains all the scalar information about the
 120    object and arrays of descriptor_dimension and array_loop_spec types for
 121    arrays.  */
 122
 123 typedef struct namelist_type
 124 {
 125
 126   /* Object type, stored as GFC_DTYPE_xxxx.  */
 127   bt type;
 128
 129   /* Object name.  */
 130   char * var_name;
 131
 132   /* Address for the start of the object's data.  */
 133   void * mem_pos;
 134
 135   /* Flag to show that a read is to be attempted for this node.  */
 136   int touched;
 137
 138   /* Length of intrinsic type in bytes.  */
 139   int len;
 140
 141   /* Rank of the object.  */
 142   int var_rank;
 143
 144   /* Overall size of the object in bytes.  */
 145   index_type size;
 146
 147   /* Length of character string.  */
 148   index_type string_length;
 149
 150   descriptor_dimension * dim;
 151   array_loop_spec * ls;
 152   struct namelist_type * next;
 153 }
 154 namelist_info;
 155
 156 /* Options for the OPEN statement.  */
 157
 158 typedef enum
 159 { ACCESS_SEQUENTIAL, ACCESS_DIRECT, ACCESS_APPEND, ACCESS_STREAM,
 160   ACCESS_UNSPECIFIED
 161 }
 162 unit_access;
 163
 164 typedef enum
 165 { ACTION_READ, ACTION_WRITE, ACTION_READWRITE,
 166   ACTION_UNSPECIFIED
 167 }
 168 unit_action;
 169
 170 typedef enum
 171 { BLANK_NULL, BLANK_ZERO, BLANK_UNSPECIFIED }
 172 unit_blank;
 173
 174 typedef enum
 175 { DELIM_NONE, DELIM_APOSTROPHE, DELIM_QUOTE,
 176   DELIM_UNSPECIFIED
 177 }
 178 unit_delim;
 179
 180 typedef enum
 181 { FORM_FORMATTED, FORM_UNFORMATTED, FORM_UNSPECIFIED }
 182 unit_form;
 183
 184 typedef enum
 185 { POSITION_ASIS, POSITION_REWIND, POSITION_APPEND,
 186   POSITION_UNSPECIFIED
 187 }
 188 unit_position;
 189
 190 typedef enum
 191 { STATUS_UNKNOWN, STATUS_OLD, STATUS_NEW, STATUS_SCRATCH,
 192   STATUS_REPLACE, STATUS_UNSPECIFIED
 193 }
 194 unit_status;
 195
 196 typedef enum
 197 { PAD_YES, PAD_NO, PAD_UNSPECIFIED }
 198 unit_pad;
 199
 200 typedef enum
 201 { ADVANCE_YES, ADVANCE_NO, ADVANCE_UNSPECIFIED }
 202 unit_advance;
 203
 204 typedef enum
 205 {READING, WRITING}
 206 unit_mode;
 207
 208 typedef enum
 209 { CONVERT_NONE=-1, CONVERT_NATIVE, CONVERT_SWAP, CONVERT_BIG, CONVERT_LITTLE }
 210 unit_convert;
 211
 212 #define CHARACTER1(name) \
 213               char * name; \
 214               gfc_charlen_type name ## _len
 215 #define CHARACTER2(name) \
 216               gfc_charlen_type name ## _len; \
 217               char * name
 218
 219 #define IOPARM_LIBRETURN_MASK           (3 << 0)
 220 #define IOPARM_LIBRETURN_OK             (0 << 0)
 221 #define IOPARM_LIBRETURN_ERROR          (1 << 0)
 222 #define IOPARM_LIBRETURN_END            (2 << 0)
 223 #define IOPARM_LIBRETURN_EOR            (3 << 0)
 224 #define IOPARM_ERR                      (1 << 2)
 225 #define IOPARM_END                      (1 << 3)
 226 #define IOPARM_EOR                      (1 << 4)
 227 #define IOPARM_HAS_IOSTAT               (1 << 5)
 228 #define IOPARM_HAS_IOMSG                (1 << 6)
 229
 230 #define IOPARM_COMMON_MASK              ((1 << 7) - 1)
 231
 232 typedef struct st_parameter_common
 233 {
 234   GFC_INTEGER_4 flags;
 235   GFC_INTEGER_4 unit;
 236   const char *filename;
 237   GFC_INTEGER_4 line;
 238   CHARACTER2 (iomsg);
 239   GFC_INTEGER_4 *iostat;
 240 }
 241 st_parameter_common;
 242
 243 #define IOPARM_OPEN_HAS_RECL_IN         (1 << 7)
 244 #define IOPARM_OPEN_HAS_FILE            (1 << 8)
 245 #define IOPARM_OPEN_HAS_STATUS          (1 << 9)
 246 #define IOPARM_OPEN_HAS_ACCESS          (1 << 10)
 247 #define IOPARM_OPEN_HAS_FORM            (1 << 11)
 248 #define IOPARM_OPEN_HAS_BLANK           (1 << 12)
 249 #define IOPARM_OPEN_HAS_POSITION        (1 << 13)
 250 #define IOPARM_OPEN_HAS_ACTION          (1 << 14)
 251 #define IOPARM_OPEN_HAS_DELIM           (1 << 15)
 252 #define IOPARM_OPEN_HAS_PAD             (1 << 16)
 253 #define IOPARM_OPEN_HAS_CONVERT         (1 << 17)
 254
 255 typedef struct
 256 {
 257   st_parameter_common common;
 258   GFC_INTEGER_4 recl_in;
 259   CHARACTER2 (file);
 260   CHARACTER1 (status);
 261   CHARACTER2 (access);
 262   CHARACTER1 (form);
 263   CHARACTER2 (blank);
 264   CHARACTER1 (position);
 265   CHARACTER2 (action);
 266   CHARACTER1 (delim);
 267   CHARACTER2 (pad);
 268   CHARACTER1 (convert);
 269 }
 270 st_parameter_open;
 271
 272 #define IOPARM_CLOSE_HAS_STATUS         (1 << 7)
 273
 274 typedef struct
 275 {
 276   st_parameter_common common;
 277   CHARACTER1 (status);
 278 }
 279 st_parameter_close;
 280
 281 typedef struct
 282 {
 283   st_parameter_common common;
 284 }
 285 st_parameter_filepos;
 286
 287 #define IOPARM_INQUIRE_HAS_EXIST        (1 << 7)
 288 #define IOPARM_INQUIRE_HAS_OPENED       (1 << 8)
 289 #define IOPARM_INQUIRE_HAS_NUMBER       (1 << 9)
 290 #define IOPARM_INQUIRE_HAS_NAMED        (1 << 10)
 291 #define IOPARM_INQUIRE_HAS_NEXTREC      (1 << 11)
 292 #define IOPARM_INQUIRE_HAS_RECL_OUT     (1 << 12)
 293 #define IOPARM_INQUIRE_HAS_STRM_POS_OUT (1 << 13)
 294 #define IOPARM_INQUIRE_HAS_FILE         (1 << 14)
 295 #define IOPARM_INQUIRE_HAS_ACCESS       (1 << 15)
 296 #define IOPARM_INQUIRE_HAS_FORM         (1 << 16)
 297 #define IOPARM_INQUIRE_HAS_BLANK        (1 << 17)
 298 #define IOPARM_INQUIRE_HAS_POSITION     (1 << 18)
 299 #define IOPARM_INQUIRE_HAS_ACTION       (1 << 19)
 300 #define IOPARM_INQUIRE_HAS_DELIM        (1 << 20)
 301 #define IOPARM_INQUIRE_HAS_PAD          (1 << 21)
 302 #define IOPARM_INQUIRE_HAS_NAME         (1 << 22)
 303 #define IOPARM_INQUIRE_HAS_SEQUENTIAL   (1 << 23)
 304 #define IOPARM_INQUIRE_HAS_DIRECT       (1 << 24)
 305 #define IOPARM_INQUIRE_HAS_FORMATTED    (1 << 25)
 306 #define IOPARM_INQUIRE_HAS_UNFORMATTED  (1 << 26)
 307 #define IOPARM_INQUIRE_HAS_READ         (1 << 27)
 308 #define IOPARM_INQUIRE_HAS_WRITE        (1 << 28)
 309 #define IOPARM_INQUIRE_HAS_READWRITE    (1 << 29)
 310 #define IOPARM_INQUIRE_HAS_CONVERT      (1 << 30)
 311
 312 typedef struct
 313 {
 314   st_parameter_common common;
 315   GFC_INTEGER_4 *exist, *opened, *number, *named;
 316   GFC_INTEGER_4 *nextrec, *recl_out;
 317   GFC_IO_INT *strm_pos_out;
 318   CHARACTER1 (file);
 319   CHARACTER2 (access);
 320   CHARACTER1 (form);
 321   CHARACTER2 (blank);
 322   CHARACTER1 (position);
 323   CHARACTER2 (action);
 324   CHARACTER1 (delim);
 325   CHARACTER2 (pad);
 326   CHARACTER1 (name);
 327   CHARACTER2 (sequential);
 328   CHARACTER1 (direct);
 329   CHARACTER2 (formatted);
 330   CHARACTER1 (unformatted);
 331   CHARACTER2 (read);
 332   CHARACTER1 (write);
 333   CHARACTER2 (readwrite);
 334   CHARACTER1 (convert);
 335 }
 336 st_parameter_inquire;
 337
 338 struct gfc_unit;
 339 struct format_data;
 340
 341 #define IOPARM_DT_LIST_FORMAT                   (1 << 7)
 342 #define IOPARM_DT_NAMELIST_READ_MODE            (1 << 8)
 343 #define IOPARM_DT_HAS_REC                       (1 << 9)
 344 #define IOPARM_DT_HAS_SIZE                      (1 << 10)
 345 #define IOPARM_DT_HAS_IOLENGTH                  (1 << 11)
 346 #define IOPARM_DT_HAS_FORMAT                    (1 << 12)
 347 #define IOPARM_DT_HAS_ADVANCE                   (1 << 13)
 348 #define IOPARM_DT_HAS_INTERNAL_UNIT             (1 << 14)
 349 #define IOPARM_DT_HAS_NAMELIST_NAME             (1 << 15)
 350 /* Internal use bit.  */
 351 #define IOPARM_DT_IONML_SET                     (1 << 31)
 352
 353 typedef struct st_parameter_dt
 354 {
 355   st_parameter_common common;
 356   GFC_IO_INT rec;
 357   GFC_INTEGER_4 *size, *iolength;
 358   gfc_array_char *internal_unit_desc;
 359   CHARACTER1 (format);
 360   CHARACTER2 (advance);
 361   CHARACTER1 (internal_unit);
 362   CHARACTER2 (namelist_name);
 363   /* Private part of the structure.  The compiler just needs
 364      to reserve enough space.  */
 365   union
 366     {
 367       struct
 368         {
 369           void (*transfer) (struct st_parameter_dt *, bt, void *, int,
 370                             size_t, size_t);
 371           struct gfc_unit *current_unit;
 372           /* Item number in a formatted data transfer.  Also used in namelist
 373                read_logical as an index into line_buffer.  */
 374           int item_count;
 375           unit_mode mode;
 376           unit_blank blank_status;
 377           enum {SIGN_S, SIGN_SS, SIGN_SP} sign_status;
 378           int scale_factor;
 379           int max_pos; /* Maximum righthand column written to.  */
 380           /* Number of skips + spaces to be done for T and X-editing.  */
 381           int skips;
 382           /* Number of spaces to be done for T and X-editing.  */
 383           int pending_spaces;
 384           /* Whether an EOR condition was encountered. Value is:
 385                0 if no EOR was encountered
 386                1 if an EOR was encountered due to a 1-byte marker (LF)
 387                2 if an EOR was encountered due to a 2-bytes marker (CRLF) */
 388           int sf_seen_eor;
 389           unit_advance advance_status;
 390
 391           unsigned reversion_flag : 1; /* Format reversion has occurred.  */
 392           unsigned first_item : 1;
 393           unsigned seen_dollar : 1;
 394           unsigned eor_condition : 1;
 395           unsigned no_leading_blank : 1;
 396           unsigned char_flag : 1;
 397           unsigned input_complete : 1;
 398           unsigned at_eol : 1;
 399           unsigned comma_flag : 1;
 400           /* A namelist specific flag used in the list directed library
 401              to flag that calls are being made from namelist read (eg. to
 402              ignore comments or to treat '/' as a terminator)  */
 403           unsigned namelist_mode : 1;
 404           /* A namelist specific flag used in the list directed library
 405              to flag read errors and return, so that an attempt can be
 406              made to read a new object name.  */
 407           unsigned nml_read_error : 1;
 408           /* A sequential formatted read specific flag used to signal that a
 409              character string is being read so don't use commas to shorten a
 410              formatted field width.  */
 411           unsigned sf_read_comma : 1;
 412           /* A namelist specific flag used to enable reading input from
 413              line_buffer for logical reads.  */
 414           unsigned line_buffer_enabled : 1;
 415           /* An internal unit specific flag used to identify that the associated
 416              unit is internal.  */
 417           unsigned unit_is_internal : 1;
 418           /* 17 unused bits.  */
 419
 420           char last_char;
 421           char nml_delim;
 422
 423           int repeat_count;
 424           int saved_length;
 425           int saved_used;
 426           bt saved_type;
 427           char *saved_string;
 428           char *scratch;
 429           char *line_buffer;
 430           struct format_data *fmt;
 431           jmp_buf *eof_jump;
 432           namelist_info *ionml;
 433           /* A flag used to identify when a non-standard expanded namelist read
 434              has occurred.  */
 435           int expanded_read;
 436           /* Storage area for values except for strings.  Must be large
 437              enough to hold a complex value (two reals) of the largest
 438              kind.  */
 439           char value[32];
 440           gfc_offset size_used;
 441         } p;
 442       /* This pad size must be equal to the pad_size declared in
 443          trans-io.c (gfc_build_io_library_fndecls).  The above structure
 444          must be smaller or equal to this array.  */
 445       char pad[16 * sizeof (char *) + 32 * sizeof (int)];
 446     } u;
 447 }
 448 st_parameter_dt;
 449
 450 /* Ensure st_parameter_dt's u.pad is bigger or equal to u.p.  */
 451 extern char check_st_parameter_dt[sizeof (((st_parameter_dt *) 0)->u.pad)
 452                                   >= sizeof (((st_parameter_dt *) 0)->u.p)
 453                                   ? 1 : -1];
 454
 455 #undef CHARACTER1
 456 #undef CHARACTER2
 457
 458 typedef struct
 459 {
 460   unit_access access;
 461   unit_action action;
 462   unit_blank blank;
 463   unit_delim delim;
 464   unit_form form;
 465   int is_notpadded;
 466   unit_position position;
 467   unit_status status;
 468   unit_pad pad;
 469   unit_convert convert;
 470 }
 471 unit_flags;
 472
 473
 474 /* The default value of record length for preconnected units is defined
 475    here. This value can be overriden by an environment variable.
 476    Default value is 1 Gb.  */
 477
 478 #define DEFAULT_RECL 1073741824
 479
 480
 481 typedef struct gfc_unit
 482 {
 483   int unit_number;
 484   stream *s;
 485
 486   /* Treap links.  */
 487   struct gfc_unit *left, *right;
 488   int priority;
 489
 490   int read_bad, current_record;
 491   enum
 492   { NO_ENDFILE, AT_ENDFILE, AFTER_ENDFILE }
 493   endfile;
 494
 495   unit_mode mode;
 496   unit_flags flags;
 497
 498   /* recl           -- Record length of the file.
 499      last_record    -- Last record number read or written
 500      maxrec         -- Maximum record number in a direct access file
 501      bytes_left     -- Bytes left in current record.
 502      strm_pos       -- Current position in file for STREAM I/O.  */
 503   gfc_offset recl, last_record, maxrec, bytes_left, strm_pos;
 504
 505   __gthread_mutex_t lock;
 506   /* Number of threads waiting to acquire this unit's lock.
 507      When non-zero, close_unit doesn't only removes the unit
 508      from the UNIT_ROOT tree, but doesn't free it and the
 509      last of the waiting threads will do that.
 510      This must be either atomically increased/decreased, or
 511      always guarded by UNIT_LOCK.  */
 512   int waiting;
 513   /* Flag set by close_unit if the unit as been closed.
 514      Must be manipulated under unit's lock.  */
 515   int closed;
 516
 517   /* For traversing arrays */
 518   array_loop_spec *ls;
 519   int rank;
 520
 521   int file_len;
 522   char *file;
 523 }
 524 gfc_unit;
 525
 526 /* Format tokens.  Only about half of these can be stored in the
 527    format nodes.  */
 528
 529 typedef enum
 530 {
 531   FMT_NONE = 0, FMT_UNKNOWN, FMT_SIGNED_INT, FMT_ZERO, FMT_POSINT, FMT_PERIOD,
 532   FMT_COMMA, FMT_COLON, FMT_SLASH, FMT_DOLLAR, FMT_T, FMT_TR, FMT_TL,
 533   FMT_LPAREN, FMT_RPAREN, FMT_X, FMT_S, FMT_SS, FMT_SP, FMT_STRING,
 534   FMT_BADSTRING, FMT_P, FMT_I, FMT_B, FMT_BN, FMT_BZ, FMT_O, FMT_Z, FMT_F,
 535   FMT_E, FMT_EN, FMT_ES, FMT_G, FMT_L, FMT_A, FMT_D, FMT_H, FMT_END
 536 }
 537 format_token;
 538
 539
 540 /* Format nodes.  A format string is converted into a tree of these
 541    structures, which is traversed as part of a data transfer statement.  */
 542
 543 typedef struct fnode
 544 {
 545   format_token format;
 546   int repeat;
 547   struct fnode *next;
 548   char *source;
 549
 550   union
 551   {
 552     struct
 553     {
 554       int w, d, e;
 555     }
 556     real;
 557
 558     struct
 559     {
 560       int length;
 561       char *p;
 562     }
 563     string;
 564
 565     struct
 566     {
 567       int w, m;
 568     }
 569     integer;
 570
 571     int w;
 572     int k;
 573     int r;
 574     int n;
 575
 576     struct fnode *child;
 577   }
 578   u;
 579
 580   /* Members for traversing the tree during data transfer.  */
 581
 582   int count;
 583   struct fnode *current;
 584
 585 }
 586 fnode;
 587
 588
 589 /* unix.c */
 590
 591 extern int move_pos_offset (stream *, int);
 592 internal_proto(move_pos_offset);
 593
 594 extern int compare_files (stream *, stream *);
 595 internal_proto(compare_files);
 596
 597 extern stream *open_external (st_parameter_open *, unit_flags *);
 598 internal_proto(open_external);
 599
 600 extern stream *open_internal (char *, int);
 601 internal_proto(open_internal);
 602
 603 extern stream *input_stream (void);
 604 internal_proto(input_stream);
 605
 606 extern stream *output_stream (void);
 607 internal_proto(output_stream);
 608
 609 extern stream *error_stream (void);
 610 internal_proto(error_stream);
 611
 612 extern int compare_file_filename (gfc_unit *, const char *, int);
 613 internal_proto(compare_file_filename);
 614
 615 extern gfc_unit *find_file (const char *file, gfc_charlen_type file_len);
 616 internal_proto(find_file);
 617
 618 extern void flush_all_units (void);
 619 internal_proto(flush_all_units);
 620
 621 extern int stream_at_bof (stream *);
 622 internal_proto(stream_at_bof);
 623
 624 extern int stream_at_eof (stream *);
 625 internal_proto(stream_at_eof);
 626
 627 extern int delete_file (gfc_unit *);
 628 internal_proto(delete_file);
 629
 630 extern int file_exists (const char *file, gfc_charlen_type file_len);
 631 internal_proto(file_exists);
 632
 633 extern const char *inquire_sequential (const char *, int);
 634 internal_proto(inquire_sequential);
 635
 636 extern const char *inquire_direct (const char *, int);
 637 internal_proto(inquire_direct);
 638
 639 extern const char *inquire_formatted (const char *, int);
 640 internal_proto(inquire_formatted);
 641
 642 extern const char *inquire_unformatted (const char *, int);
 643 internal_proto(inquire_unformatted);
 644
 645 extern const char *inquire_read (const char *, int);
 646 internal_proto(inquire_read);
 647
 648 extern const char *inquire_write (const char *, int);
 649 internal_proto(inquire_write);
 650
 651 extern const char *inquire_readwrite (const char *, int);
 652 internal_proto(inquire_readwrite);
 653
 654 extern gfc_offset file_length (stream *);
 655 internal_proto(file_length);
 656
 657 extern gfc_offset file_position (stream *);
 658 internal_proto(file_position);
 659
 660 extern int is_seekable (stream *);
 661 internal_proto(is_seekable);
 662
 663 extern int is_preconnected (stream *);
 664 internal_proto(is_preconnected);
 665
 666 extern void flush_if_preconnected (stream *);
 667 internal_proto(flush_if_preconnected);
 668
 669 extern void empty_internal_buffer(stream *);
 670 internal_proto(empty_internal_buffer);
 671
 672 extern try flush (stream *);
 673 internal_proto(flush);
 674
 675 extern int stream_isatty (stream *);
 676 internal_proto(stream_isatty);
 677
 678 extern char * stream_ttyname (stream *);
 679 internal_proto(stream_ttyname);
 680
 681 extern gfc_offset stream_offset (stream *s);
 682 internal_proto(stream_offset);
 683
 684 extern int unpack_filename (char *, const char *, int);
 685 internal_proto(unpack_filename);
 686
 687 /* unit.c */
 688
 689 /* Maximum file offset, computed at library initialization time.  */
 690 extern gfc_offset max_offset;
 691 internal_proto(max_offset);
 692
 693 /* Unit tree root.  */
 694 extern gfc_unit *unit_root;
 695 internal_proto(unit_root);
 696
 697 extern __gthread_mutex_t unit_lock;
 698 internal_proto(unit_lock);
 699
 700 extern int close_unit (gfc_unit *);
 701 internal_proto(close_unit);
 702
 703 extern gfc_unit *get_internal_unit (st_parameter_dt *);
 704 internal_proto(get_internal_unit);
 705
 706 extern void free_internal_unit (st_parameter_dt *);
 707 internal_proto(free_internal_unit);
 708
 709 extern int is_internal_unit (st_parameter_dt *);
 710 internal_proto(is_internal_unit);
 711
 712 extern int is_array_io (st_parameter_dt *);
 713 internal_proto(is_array_io);
 714
 715 extern int is_stream_io (st_parameter_dt *);
 716 internal_proto(is_stream_io);
 717
 718 extern gfc_unit *find_unit (int);
 719 internal_proto(find_unit);
 720
 721 extern gfc_unit *find_or_create_unit (int);
 722 internal_proto(find_or_create_unit);
 723
 724 extern gfc_unit *get_unit (st_parameter_dt *, int);
 725 internal_proto(get_unit);
 726
 727 extern void unlock_unit (gfc_unit *);
 728 internal_proto(unlock_unit);
 729
 730 /* open.c */
 731
 732 extern void test_endfile (gfc_unit *);
 733 internal_proto(test_endfile);
 734
 735 extern gfc_unit *new_unit (st_parameter_open *, gfc_unit *, unit_flags *);
 736 internal_proto(new_unit);
 737
 738 /* format.c */
 739
 740 extern void parse_format (st_parameter_dt *);
 741 internal_proto(parse_format);
 742
 743 extern const fnode *next_format (st_parameter_dt *);
 744 internal_proto(next_format);
 745
 746 extern void unget_format (st_parameter_dt *, const fnode *);
 747 internal_proto(unget_format);
 748
 749 extern void format_error (st_parameter_dt *, const fnode *, const char *);
 750 internal_proto(format_error);
 751
 752 extern void free_format_data (st_parameter_dt *);
 753 internal_proto(free_format_data);
 754
 755 /* transfer.c */
 756
 757 #define SCRATCH_SIZE 300
 758
 759 extern const char *type_name (bt);
 760 internal_proto(type_name);
 761
 762 extern void *read_block (st_parameter_dt *, int *);
 763 internal_proto(read_block);
 764
 765 extern char *read_sf (st_parameter_dt *, int *, int);
 766 internal_proto(read_sf);
 767
 768 extern void *write_block (st_parameter_dt *, int);
 769 internal_proto(write_block);
 770
 771 extern gfc_offset next_array_record (st_parameter_dt *, array_loop_spec *);
 772 internal_proto(next_array_record);
 773
 774 extern gfc_offset init_loop_spec (gfc_array_char *, array_loop_spec *);
 775 internal_proto(init_loop_spec);
 776
 777 extern void next_record (st_parameter_dt *, int);
 778 internal_proto(next_record);
 779
 780 extern void reverse_memcpy (void *, const void *, size_t);
 781 internal_proto (reverse_memcpy);
 782
 783 /* read.c */
 784
 785 extern void set_integer (void *, GFC_INTEGER_LARGEST, int);
 786 internal_proto(set_integer);
 787
 788 extern GFC_UINTEGER_LARGEST max_value (int, int);
 789 internal_proto(max_value);
 790
 791 extern int convert_real (st_parameter_dt *, void *, const char *, int);
 792 internal_proto(convert_real);
 793
 794 extern void read_a (st_parameter_dt *, const fnode *, char *, int);
 795 internal_proto(read_a);
 796
 797 extern void read_f (st_parameter_dt *, const fnode *, char *, int);
 798 internal_proto(read_f);
 799
 800 extern void read_l (st_parameter_dt *, const fnode *, char *, int);
 801 internal_proto(read_l);
 802
 803 extern void read_x (st_parameter_dt *, int);
 804 internal_proto(read_x);
 805
 806 extern void read_radix (st_parameter_dt *, const fnode *, char *, int, int);
 807 internal_proto(read_radix);
 808
 809 extern void read_decimal (st_parameter_dt *, const fnode *, char *, int);
 810 internal_proto(read_decimal);
 811
 812 /* list_read.c */
 813
 814 extern void list_formatted_read (st_parameter_dt *, bt, void *, int, size_t,
 815                                  size_t);
 816 internal_proto(list_formatted_read);
 817
 818 extern void finish_list_read (st_parameter_dt *);
 819 internal_proto(finish_list_read);
 820
 821 extern void namelist_read (st_parameter_dt *);
 822 internal_proto(namelist_read);
 823
 824 extern void namelist_write (st_parameter_dt *);
 825 internal_proto(namelist_write);
 826
 827 /* write.c */
 828
 829 extern void write_a (st_parameter_dt *, const fnode *, const char *, int);
 830 internal_proto(write_a);
 831
 832 extern void write_b (st_parameter_dt *, const fnode *, const char *, int);
 833 internal_proto(write_b);
 834
 835 extern void write_d (st_parameter_dt *, const fnode *, const char *, int);
 836 internal_proto(write_d);
 837
 838 extern void write_e (st_parameter_dt *, const fnode *, const char *, int);
 839 internal_proto(write_e);
 840
 841 extern void write_en (st_parameter_dt *, const fnode *, const char *, int);
 842 internal_proto(write_en);
 843
 844 extern void write_es (st_parameter_dt *, const fnode *, const char *, int);
 845 internal_proto(write_es);
 846
 847 extern void write_f (st_parameter_dt *, const fnode *, const char *, int);
 848 internal_proto(write_f);
 849
 850 extern void write_i (st_parameter_dt *, const fnode *, const char *, int);
 851 internal_proto(write_i);
 852
 853 extern void write_l (st_parameter_dt *, const fnode *, char *, int);
 854 internal_proto(write_l);
 855
 856 extern void write_o (st_parameter_dt *, const fnode *, const char *, int);
 857 internal_proto(write_o);
 858
 859 extern void write_x (st_parameter_dt *, int, int);
 860 internal_proto(write_x);
 861
 862 extern void write_z (st_parameter_dt *, const fnode *, const char *, int);
 863 internal_proto(write_z);
 864
 865 extern void list_formatted_write (st_parameter_dt *, bt, void *, int, size_t,
 866                                   size_t);
 867 internal_proto(list_formatted_write);
 868
 869 /* error.c */
 870 extern notification notification_std(int);
 871 internal_proto(notification_std);
 872
 873 /* size_from_kind.c */
 874 extern size_t size_from_real_kind (int);
 875 internal_proto(size_from_real_kind);
 876
 877 extern size_t size_from_complex_kind (int);
 878 internal_proto(size_from_complex_kind);
 879
 880 /* lock.c */
 881 extern void free_ionml (st_parameter_dt *);
 882 internal_proto(free_ionml);
 883
 884 static inline void
 885 inc_waiting_locked (gfc_unit *u)
 886 {
 887 #ifdef HAVE_SYNC_FETCH_AND_ADD
 888   (void) __sync_fetch_and_add (&u->waiting, 1);
 889 #else
 890   u->waiting++;
 891 #endif
 892 }
 893
 894 static inline int
 895 predec_waiting_locked (gfc_unit *u)
 896 {
 897 #ifdef HAVE_SYNC_FETCH_AND_ADD
 898   return __sync_add_and_fetch (&u->waiting, -1);
 899 #else
 900   return --u->waiting;
 901 #endif
 902 }
 903
 904 static inline void
 905 dec_waiting_unlocked (gfc_unit *u)
 906 {
 907 #ifdef HAVE_SYNC_FETCH_AND_ADD
 908   (void) __sync_fetch_and_add (&u->waiting, -1);
 909 #else
 910   __gthread_mutex_lock (&unit_lock);
 911   u->waiting--;
 912   __gthread_mutex_unlock (&unit_lock);
 913 #endif
 914 }
 915
 916 #endif
 917
 918 /* ../runtime/environ.c  This is here because we return unit_convert.  */
 919
 920 unit_convert get_unformatted_convert (int);
 921 internal_proto(get_unformatted_convert);