libio/libio.h

   1 /* Copyright (C) 1991, 92, 93, 94, 95, 97, 98 Free Software Foundation, Inc.
   2    This file is part of the GNU IO Library.
   3    Written by Per Bothner <bothner@cygnus.com>.
   4
   5    This library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU General Public License as
   7    published by the Free Software Foundation; either version 2, or (at
   8    your option) any later version.
   9
  10    This library is distributed in the hope that it will be useful, but
  11    WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this library; see the file COPYING.  If not, write to
  17    the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
  18    MA 02111-1307, USA.
  19
  20    As a special exception, if you link this library with files
  21    compiled with a GNU compiler to produce an executable, this does
  22    not cause the resulting executable to be covered by the GNU General
  23    Public License.  This exception does not however invalidate any
  24    other reasons why the executable file might be covered by the GNU
  25    General Public License.  */
  26
  27 #ifndef _IO_STDIO_H
  28 #define _IO_STDIO_H
  29
  30 #include <_G_config.h>
  31 #define _IO_pos_t _G_fpos_t /* obsolete */
  32 #define _IO_fpos_t _G_fpos_t
  33 #define _IO_size_t _G_size_t
  34 #define _IO_ssize_t _G_ssize_t
  35 #define _IO_off_t _G_off_t
  36 #define _IO_pid_t _G_pid_t
  37 #define _IO_uid_t _G_uid_t
  38 #define _IO_HAVE_SYS_WAIT _G_HAVE_SYS_WAIT
  39 #define _IO_HAVE_ST_BLKSIZE _G_HAVE_ST_BLKSIZE
  40 #define _IO_BUFSIZ _G_BUFSIZ
  41 #define _IO_va_list _G_va_list
  42 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
  43 #define _IO_fpos64_t _G_fpos64_t
  44 #define _IO_off64_t _G_off64_t
  45 #endif
  46
  47 #ifdef _G_NEED_STDARG_H
  48 /* This define avoids name pollution if we're using GNU stdarg.h */
  49 # define __need___va_list
  50 # include <stdarg.h>
  51 # ifdef __GNUC_VA_LIST
  52 #  undef _IO_va_list
  53 #  define _IO_va_list __gnuc_va_list
  54 # endif /* __GNUC_VA_LIST */
  55 #endif
  56
  57 #ifndef __P
  58 # if _G_HAVE_SYS_CDEFS
  59 #  include <sys/cdefs.h>
  60 # else
  61 #  ifdef __STDC__
  62 #   define __P(p) p
  63 #  else
  64 #   define __P(p) ()
  65 #  endif
  66 # endif
  67 #endif /*!__P*/
  68
  69 #ifndef __PMT
  70 # ifdef __STDC__
  71 #  define __PMT(p) p
  72 # else
  73 #  define __PMT(p) ()
  74 # endif
  75 #endif /*!__P*/
  76
  77 /* For backward compatibility */
  78 #ifndef _PARAMS
  79 # define _PARAMS(protos) __P(protos)
  80 #endif /*!_PARAMS*/
  81
  82 #ifndef __STDC__
  83 # define const
  84 #endif
  85 #define _IO_UNIFIED_JUMPTABLES 1
  86 #if !_G_HAVE_PRINTF_FP
  87 # define _IO_USE_DTOA 1
  88 #endif
  89
  90 #ifndef EOF
  91 # define EOF (-1)
  92 #endif
  93 #ifndef NULL
  94 # if defined __GNUG__ && \
  95     (__GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 8))
  96 #  define NULL (__null)
  97 # else
  98 #  if !defined(__cplusplus)
  99 #   define NULL ((void*)0)
 100 #  else
 101 #   define NULL (0)
 102 #  endif
 103 # endif
 104 #endif
 105
 106 #define _IOS_INPUT      1
 107 #define _IOS_OUTPUT     2
 108 #define _IOS_ATEND      4
 109 #define _IOS_APPEND     8
 110 #define _IOS_TRUNC      16
 111 #define _IOS_NOCREATE   32
 112 #define _IOS_NOREPLACE  64
 113 #define _IOS_BIN        128
 114
 115 /* Magic numbers and bits for the _flags field.
 116    The magic numbers use the high-order bits of _flags;
 117    the remaining bits are available for variable flags.
 118    Note: The magic numbers must all be negative if stdio
 119    emulation is desired. */
 120
 121 #define _IO_MAGIC 0xFBAD0000 /* Magic number */
 122 #define _OLD_STDIO_MAGIC 0xFABC0000 /* Emulate old stdio. */
 123 #define _IO_MAGIC_MASK 0xFFFF0000
 124 #define _IO_USER_BUF 1 /* User owns buffer; don't delete it on close. */
 125 #define _IO_UNBUFFERED 2
 126 #define _IO_NO_READS 4 /* Reading not allowed */
 127 #define _IO_NO_WRITES 8 /* Writing not allowd */
 128 #define _IO_EOF_SEEN 0x10
 129 #define _IO_ERR_SEEN 0x20
 130 #define _IO_DELETE_DONT_CLOSE 0x40 /* Don't call close(_fileno) on cleanup. */
 131 #define _IO_LINKED 0x80 /* Set if linked (using _chain) to streambuf::_list_all.*/
 132 #define _IO_IN_BACKUP 0x100
 133 #define _IO_LINE_BUF 0x200
 134 #define _IO_TIED_PUT_GET 0x400 /* Set if put and get pointer logicly tied. */
 135 #define _IO_CURRENTLY_PUTTING 0x800
 136 #define _IO_IS_APPENDING 0x1000
 137 #define _IO_IS_FILEBUF 0x2000
 138 #define _IO_BAD_SEEN 0x4000
 139
 140 /* These are "formatting flags" matching the iostream fmtflags enum values. */
 141 #define _IO_SKIPWS 01
 142 #define _IO_LEFT 02
 143 #define _IO_RIGHT 04
 144 #define _IO_INTERNAL 010
 145 #define _IO_DEC 020
 146 #define _IO_OCT 040
 147 #define _IO_HEX 0100
 148 #define _IO_SHOWBASE 0200
 149 #define _IO_SHOWPOINT 0400
 150 #define _IO_UPPERCASE 01000
 151 #define _IO_SHOWPOS 02000
 152 #define _IO_SCIENTIFIC 04000
 153 #define _IO_FIXED 010000
 154 #define _IO_UNITBUF 020000
 155 #define _IO_STDIO 040000
 156 #define _IO_DONT_CLOSE 0100000
 157 #define _IO_BOOLALPHA 0200000
 158
 159
 160 struct _IO_jump_t;  struct _IO_FILE;
 161
 162 /* Handle lock.  */
 163 #ifdef _IO_MTSAFE_IO
 164 # if defined __GLIBC__ && __GLIBC__ >= 2
 165 #  if __GLIBC_MINOR__ > 0
 166 #   include <bits/stdio-lock.h>
 167 #  else
 168 #   include <stdio-lock.h>
 169 #  endif
 170 #  define _IO_LOCK_T _IO_lock_t *
 171 # else
 172 /*# include <comthread.h>*/
 173 # endif
 174 #else
 175 # if defined(__GLIBC__) && __GLIBC__ >= 2
 176    typedef void _IO_lock_t;
 177 #  define _IO_LOCK_T void *
 178 # else
 179 #  ifdef __linux__
 180     struct _IO_lock_t { void *ptr; short int field1; short int field2; };
 181 #   define _IO_LOCK_T struct _IO_lock_t
 182 #  else
 183     typedef void _IO_lock_t;
 184 #  endif
 185 # endif
 186 #endif
 187
 188
 189 /* A streammarker remembers a position in a buffer. */
 190
 191 struct _IO_marker {
 192   struct _IO_marker *_next;
 193   struct _IO_FILE *_sbuf;
 194   /* If _pos >= 0
 195  it points to _buf->Gbase()+_pos. FIXME comment */
 196   /* if _pos < 0, it points to _buf->eBptr()+_pos. FIXME comment */
 197   int _pos;
 198 #if 0
 199     void set_streampos(streampos sp) { _spos = sp; }
 200     void set_offset(int offset) { _pos = offset; _spos = (streampos)(-2); }
 201   public:
 202     streammarker(streambuf *sb);
 203     ~streammarker();
 204     int saving() { return  _spos == -2; }
 205     int delta(streammarker&);
 206     int delta();
 207 #endif
 208 };
 209
 210 struct _IO_FILE {
 211   int _flags;           /* High-order word is _IO_MAGIC; rest is flags. */
 212 #define _IO_file_flags _flags
 213
 214   /* The following pointers correspond to the C++ streambuf protocol. */
 215   /* Note:  Tk uses the _IO_read_ptr and _IO_read_end fields directly. */
 216   char* _IO_read_ptr;   /* Current read pointer */
 217   char* _IO_read_end;   /* End of get area. */
 218   char* _IO_read_base;  /* Start of putback+get area. */
 219   char* _IO_write_base; /* Start of put area. */
 220   char* _IO_write_ptr;  /* Current put pointer. */
 221   char* _IO_write_end;  /* End of put area. */
 222   char* _IO_buf_base;   /* Start of reserve area. */
 223   char* _IO_buf_end;    /* End of reserve area. */
 224   /* The following fields are used to support backing up and undo. */
 225   char *_IO_save_base; /* Pointer to start of non-current get area. */
 226   char *_IO_backup_base;  /* Pointer to first valid character of backup area */
 227   char *_IO_save_end; /* Pointer to end of non-current get area. */
 228
 229   struct _IO_marker *_markers;
 230
 231   struct _IO_FILE *_chain;
 232
 233   int _fileno;
 234   int _blksize;
 235 #ifdef _G_IO_IO_FILE_VERSION
 236   _IO_off_t _old_offset;
 237 #else
 238   _IO_off_t _offset;
 239 #endif
 240
 241 #define __HAVE_COLUMN /* temporary */
 242   /* 1+column number of pbase(); 0 is unknown. */
 243   unsigned short _cur_column;
 244   char _unused;
 245   char _shortbuf[1];
 246
 247   /*  char* _save_gptr;  char* _save_egptr; */
 248
 249 #ifdef _IO_LOCK_T
 250   _IO_LOCK_T _lock;
 251 #endif
 252 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
 253   _IO_off64_t _offset;
 254   int _unused2[16];     /* Make sure we don't get into trouble again.  */
 255 #endif
 256 };
 257
 258 #ifndef __cplusplus
 259 typedef struct _IO_FILE _IO_FILE;
 260 #endif
 261
 262 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
 263 #define _IO_stdin_ _IO_2_1_stdin_
 264 #define _IO_stdout_ _IO_2_1_stdout_
 265 #define _IO_stderr_ _IO_2_1_stderr_
 266 #endif
 267
 268 struct _IO_FILE_plus;
 269 extern struct _IO_FILE_plus _IO_stdin_, _IO_stdout_, _IO_stderr_;
 270 #define _IO_stdin ((_IO_FILE*)(&_IO_stdin_))
 271 #define _IO_stdout ((_IO_FILE*)(&_IO_stdout_))
 272 #define _IO_stderr ((_IO_FILE*)(&_IO_stderr_))
 273
 274
 275 /* Define the user-visible type, with user-friendly member names.  */
 276 typedef struct
 277 {
 278   _IO_ssize_t (*read) __PMT ((struct _IO_FILE *, void *, _IO_ssize_t));
 279   _IO_ssize_t (*write) __PMT ((struct _IO_FILE *, const void *, _IO_ssize_t));
 280   _IO_fpos_t (*seek) __PMT ((struct _IO_FILE *, _IO_off_t, int));
 281   int (*close) __PMT ((struct _IO_FILE *));
 282 } _IO_cookie_io_functions_t;
 283
 284 /* Special file type for fopencookie function.  */
 285 struct _IO_cookie_file
 286 {
 287   struct _IO_FILE file;
 288   const void *vtable;
 289   void *cookie;
 290   _IO_cookie_io_functions_t io_functions;
 291 };
 292
 293
 294 #ifdef __cplusplus
 295 extern "C" {
 296 #endif
 297
 298 extern int __underflow __P ((_IO_FILE *));
 299 extern int __uflow __P ((_IO_FILE *));
 300 extern int __overflow __P ((_IO_FILE *, int));
 301
 302 #define _IO_getc_unlocked(_fp) \
 303        ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end ? __uflow (_fp) \
 304         : *(unsigned char *) (_fp)->_IO_read_ptr++)
 305 #define _IO_peekc_unlocked(_fp) \
 306        ((_fp)->_IO_read_ptr >= (_fp)->_IO_read_end \
 307           && __underflow (_fp) == EOF ? EOF \
 308         : *(unsigned char *) (_fp)->_IO_read_ptr)
 309
 310 #define _IO_putc_unlocked(_ch, _fp) \
 311    (((_fp)->_IO_write_ptr >= (_fp)->_IO_write_end) \
 312     ? __overflow (_fp, (unsigned char) (_ch)) \
 313     : (unsigned char) (*(_fp)->_IO_write_ptr++ = (_ch)))
 314
 315 #define _IO_feof_unlocked(__fp) (((__fp)->_flags & _IO_EOF_SEEN) != 0)
 316 #define _IO_ferror_unlocked(__fp) (((__fp)->_flags & _IO_ERR_SEEN) != 0)
 317
 318 extern int _IO_getc __P ((_IO_FILE *__fp));
 319 extern int _IO_putc __P ((int __c, _IO_FILE *__fp));
 320 extern int _IO_feof __P ((_IO_FILE *__fp));
 321 extern int _IO_ferror __P ((_IO_FILE *__fp));
 322
 323 extern int _IO_peekc_locked __P ((_IO_FILE *__fp));
 324
 325 /* This one is for Emacs. */
 326 #define _IO_PENDING_OUTPUT_COUNT(_fp)   \
 327         ((_fp)->_IO_write_ptr - (_fp)->_IO_write_base)
 328
 329 extern void _IO_flockfile __P ((_IO_FILE *));
 330 extern void _IO_funlockfile __P ((_IO_FILE *));
 331 extern int _IO_ftrylockfile __P ((_IO_FILE *));
 332
 333 #ifdef _IO_MTSAFE_IO
 334 # define _IO_peekc(_fp) _IO_peekc_locked (_fp)
 335 #else
 336 # define _IO_peekc(_fp) _IO_peekc_unlocked (_fp)
 337 # define _IO_flockfile(_fp) /**/
 338 # define _IO_funlockfile(_fp) /**/
 339 # define _IO_ftrylockfile(_fp) /**/
 340 # define _IO_cleanup_region_start(_fct, _fp) /**/
 341 # define _IO_cleanup_region_end(_Doit) /**/
 342 #endif /* !_IO_MTSAFE_IO */
 343
 344
 345 extern int _IO_vfscanf __P ((_IO_FILE *, const char *, _IO_va_list, int *));
 346 extern int _IO_vfprintf __P ((_IO_FILE *, const char *, _IO_va_list));
 347 extern _IO_ssize_t _IO_padn __P ((_IO_FILE *, int, _IO_ssize_t));
 348 extern _IO_size_t _IO_sgetn __P ((_IO_FILE *, void *, _IO_size_t));
 349
 350 #if defined(_G_IO_IO_FILE_VERSION) && _G_IO_IO_FILE_VERSION == 0x20001
 351 extern _IO_fpos64_t _IO_seekoff __P ((_IO_FILE *, _IO_off64_t, int, int));
 352 extern _IO_fpos64_t _IO_seekpos __P ((_IO_FILE *, _IO_fpos64_t, int));
 353 #else
 354 extern _IO_fpos_t _IO_seekoff __P ((_IO_FILE *, _IO_off_t, int, int));
 355 extern _IO_fpos_t _IO_seekpos __P ((_IO_FILE *, _IO_fpos_t, int));
 356 #endif
 357
 358 extern void _IO_free_backup_area __P ((_IO_FILE *));
 359
 360 #ifdef __cplusplus
 361 }
 362 #endif
 363
 364 #endif /* _IO_STDIO_H */