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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 | /* Copyright (C) 2002-2004 Manuel Novoa III <mjn3@codepoet.org> * * GNU Library General Public License (LGPL) version 2 or later. * * Dedicated to Toni. See uClibc/DEDICATION.mjn3 for details. */ #ifndef _STDIO_H #error Always include <stdio.h> rather than <bits/uClibc_stdio.h> #endif /**********************************************************************/ #define __STDIO_BUFFERS /* ANSI/ISO mandate at least 256. */ #if defined(__UCLIBC_HAS_STDIO_BUFSIZ_NONE__) /* Fake this because some apps use stdio.h BUFSIZ. */ #define __STDIO_BUFSIZ 256 #undef __STDIO_BUFFERS #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_256__) #define __STDIO_BUFSIZ 256 #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_512__) #define __STDIO_BUFSIZ 512 #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_1024__) #define __STDIO_BUFSIZ 1024 #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_2048__) #define __STDIO_BUFSIZ 2048 #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_4096__) #define __STDIO_BUFSIZ 4096 #elif defined(__UCLIBC_HAS_STDIO_BUFSIZ_8192__) #define __STDIO_BUFSIZ 8192 #else #error config seems to be out of sync regarding bufsiz options #endif #ifdef __UCLIBC_HAS_STDIO_BUFSIZ_NONE__ #define __STDIO_BUILTIN_BUF_SIZE 0 #else /* __UCLIBC_HAS_STDIO_BUFSIZ_NONE__ */ #if defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_NONE__) #define __STDIO_BUILTIN_BUF_SIZE 0 #elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_4__) #define __STDIO_BUILTIN_BUF_SIZE 4 #elif defined(__UCLIBC_HAS_STDIO_BUILTIN_BUFFER_8__) #define __STDIO_BUILTIN_BUF_SIZE 8 #else #error config seems to be out of sync regarding builtin buffer size #endif #endif #if defined(__STDIO_BUFFERS) || defined(__UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__) || defined(__UCLIBC_HAS_THREADS__) #define __STDIO_HAS_OPENLIST 1 #else #undef __STDIO_HAS_OPENLIST #endif /**********************************************************************/ #ifdef __UCLIBC_HAS_WCHAR__ #define __need_wchar_t #include <stddef.h> /* Note: we don't really need mbstate for 8-bit locales. We do for UTF-8. * For now, always use it. */ #define __STDIO_MBSTATE #define __need_mbstate_t #include <wchar.h> #endif /**********************************************************************/ /* Currently unimplemented/untested */ /* #define __STDIO_FLEXIBLE_SETVBUF */ #ifdef __UCLIBC_HAS_STDIO_GETC_MACRO__ #define __STDIO_GETC_MACRO #endif #ifdef __UCLIBC_HAS_STDIO_PUTC_MACRO__ #define __STDIO_PUTC_MACRO #endif #ifdef _LIBC /**********************************************************************/ #include <bits/uClibc_mutex.h> /* user_locking * 0 : do auto locking/unlocking * 1 : user does locking/unlocking * 2 : initial state prior to thread initialization * with no auto locking/unlocking * * When threading is initialized, walk the stdio open stream list * and do "if (user_locking == 2) user_locking = 0;". * * This way, we avoid calling the weak lock/unlock functions. */ #define __STDIO_AUTO_THREADLOCK_VAR \ __UCLIBC_MUTEX_AUTO_LOCK_VAR(__infunc_user_locking) #define __STDIO_AUTO_THREADLOCK(__stream) \ __UCLIBC_IO_MUTEX_AUTO_LOCK((__stream)->__lock, __infunc_user_locking, \ (__stream)->__user_locking) #define __STDIO_AUTO_THREADUNLOCK(__stream) \ __UCLIBC_IO_MUTEX_AUTO_UNLOCK((__stream)->__lock, __infunc_user_locking) #define __STDIO_ALWAYS_THREADLOCK(__stream) \ __UCLIBC_IO_MUTEX_LOCK((__stream)->__lock) #define __STDIO_ALWAYS_THREADUNLOCK(__stream) \ __UCLIBC_IO_MUTEX_UNLOCK((__stream)->__lock) #define __STDIO_ALWAYS_THREADLOCK_CANCEL_UNSAFE(__stream) \ __UCLIBC_IO_MUTEX_LOCK_CANCEL_UNSAFE((__stream)->__lock) #define __STDIO_ALWAYS_THREADTRYLOCK_CANCEL_UNSAFE(__stream) \ __UCLIBC_IO_MUTEX_TRYLOCK_CANCEL_UNSAFE((__stream)->__lock) #define __STDIO_ALWAYS_THREADUNLOCK_CANCEL_UNSAFE(__stream) \ __UCLIBC_IO_MUTEX_UNLOCK_CANCEL_UNSAFE((__stream)->__lock) #ifdef __UCLIBC_HAS_THREADS__ #define __STDIO_SET_USER_LOCKING(__stream) ((__stream)->__user_locking = 1) #else #define __STDIO_SET_USER_LOCKING(__stream) ((void)0) #endif #ifdef __UCLIBC_HAS_THREADS__ #ifdef __USE_STDIO_FUTEXES__ #define STDIO_INIT_MUTEX(M) _IO_lock_init(M) #else #define STDIO_INIT_MUTEX(M) __stdio_init_mutex(& M) #endif #endif #endif /* _LIBC */ /**********************************************************************/ #define __STDIO_IOFBF 0 /* Fully buffered. */ #define __STDIO_IOLBF 1 /* Line buffered. */ #define __STDIO_IONBF 2 /* No buffering. */ typedef struct { __off_t __pos; #ifdef __STDIO_MBSTATE __mbstate_t __mbstate; #endif #ifdef __UCLIBC_HAS_WCHAR__ int __mblen_pending; #endif } __STDIO_fpos_t; #ifdef __UCLIBC_HAS_LFS__ typedef struct { __off64_t __pos; #ifdef __STDIO_MBSTATE __mbstate_t __mbstate; #endif #ifdef __UCLIBC_HAS_WCHAR__ int __mblen_pending; #endif } __STDIO_fpos64_t; #endif /**********************************************************************/ #ifdef __UCLIBC_HAS_LFS__ typedef __off64_t __offmax_t; /* TODO -- rename this? */ #else typedef __off_t __offmax_t; /* TODO -- rename this? */ #endif /**********************************************************************/ #ifdef __UCLIBC_HAS_GLIBC_CUSTOM_STREAMS__ typedef __ssize_t __io_read_fn(void *__cookie, char *__buf, size_t __bufsize); typedef __ssize_t __io_write_fn(void *__cookie, const char *__buf, size_t __bufsize); /* NOTE: GLIBC difference!!! -- fopencookie seek function * For glibc, the type of pos is always (__off64_t *) but in our case * it is type (__off_t *) when the lib is built without large file support. */ typedef int __io_seek_fn(void *__cookie, __offmax_t *__pos, int __whence); typedef int __io_close_fn(void *__cookie); typedef struct { __io_read_fn *read; __io_write_fn *write; __io_seek_fn *seek; __io_close_fn *close; } _IO_cookie_io_functions_t; #ifdef __USE_GNU typedef __io_read_fn cookie_read_function_t; typedef __io_write_fn cookie_write_function_t; typedef __io_seek_fn cookie_seek_function_t; typedef __io_close_fn cookie_close_function_t; typedef _IO_cookie_io_functions_t cookie_io_functions_t; #endif #endif /**********************************************************************/ #if defined __UCLIBC_HAS_THREADS__ && !defined __UCLIBC_IO_MUTEX /* keep this in sync with uClibc_mutex.h */ # ifdef __USE_STDIO_FUTEXES__ # include <bits/stdio-lock.h> # define __UCLIBC_IO_MUTEX(M) _IO_lock_t M # else # include <bits/pthreadtypes.h> # define __UCLIBC_IO_MUTEX(M) pthread_mutex_t M # endif /* __UCLIBC_HAS_THREADS_NATIVE__ */ #endif struct __STDIO_FILE_STRUCT { unsigned short __modeflags; /* There could be a hole here, but modeflags is used most.*/ #ifdef __UCLIBC_HAS_WCHAR__ unsigned char __ungot_width[2]; /* 0: current (building) char; 1: scanf */ /* Move the following futher down to avoid problems with getc/putc * macros breaking shared apps when wchar config support is changed. */ /* wchar_t ungot[2]; */ #else /* __UCLIBC_HAS_WCHAR__ */ unsigned char __ungot[2]; #endif /* __UCLIBC_HAS_WCHAR__ */ int __filedes; #ifdef __STDIO_BUFFERS unsigned char *__bufstart; /* pointer to buffer */ unsigned char *__bufend; /* pointer to 1 past end of buffer */ unsigned char *__bufpos; unsigned char *__bufread; /* pointer to 1 past last buffered read char */ #ifdef __STDIO_GETC_MACRO unsigned char *__bufgetc_u; /* 1 past last readable by getc_unlocked */ #endif /* __STDIO_GETC_MACRO */ #ifdef __STDIO_PUTC_MACRO unsigned char *__bufputc_u; /* 1 past last writeable by putc_unlocked */ #endif /* __STDIO_PUTC_MACRO */ #endif /* __STDIO_BUFFERS */ #ifdef __STDIO_HAS_OPENLIST struct __STDIO_FILE_STRUCT *__nextopen; #endif #ifdef __UCLIBC_HAS_WCHAR__ wchar_t __ungot[2]; #endif #ifdef __STDIO_MBSTATE __mbstate_t __state; #endif #ifdef __UCLIBC_HAS_XLOCALE__ void *__unused; /* Placeholder for codeset binding. */ #endif #ifdef __UCLIBC_HAS_THREADS__ int __user_locking; __UCLIBC_IO_MUTEX(__lock); #endif /* Everything after this is unimplemented... and may be trashed. */ #if __STDIO_BUILTIN_BUF_SIZE > 0 unsigned char __builtinbuf[__STDIO_BUILTIN_BUF_SIZE]; #endif /* __STDIO_BUILTIN_BUF_SIZE > 0 */ }; /***********************************************************************/ /* Having ungotten characters implies the stream is reading. * The scheme used here treats the least significant 2 bits of * the stream's modeflags member as follows: * 0 0 Not currently reading. * 0 1 Reading, but no ungetc() or scanf() push back chars. * 1 0 Reading with one ungetc() char (ungot[1] is 1) * or one scanf() pushed back char (ungot[1] is 0). * 1 1 Reading with both an ungetc() char and a scanf() * pushed back char. Note that this must be the result * of a scanf() push back (in ungot[0]) _followed_ by * an ungetc() call (in ungot[1]). * * Notes: * scanf() can NOT use ungetc() to push back characters. * (See section 7.19.6.2 of the C9X rationale -- WG14/N897.) */ #define __MASK_READING 0x0003U /* (0x0001 | 0x0002) */ #define __FLAG_READING 0x0001U #define __FLAG_UNGOT 0x0002U #define __FLAG_EOF 0x0004U #define __FLAG_ERROR 0x0008U #define __FLAG_WRITEONLY 0x0010U #define __FLAG_READONLY 0x0020U /* (__FLAG_WRITEONLY << 1) */ #define __FLAG_WRITING 0x0040U #define __FLAG_NARROW 0x0080U #define __FLAG_FBF 0x0000U /* must be 0 */ #define __FLAG_LBF 0x0100U #define __FLAG_NBF 0x0200U /* (__FLAG_LBF << 1) */ #define __MASK_BUFMODE 0x0300U /* (__FLAG_LBF|__FLAG_NBF) */ #define __FLAG_APPEND 0x0400U /* fixed! == O_APPEND for linux */ #define __FLAG_WIDE 0x0800U /* available slot 0x1000U */ #define __FLAG_FREEFILE 0x2000U #define __FLAG_FREEBUF 0x4000U #define __FLAG_LARGEFILE 0x8000U /* fixed! == 0_LARGEFILE for linux */ #define __FLAG_FAILED_FREOPEN __FLAG_LARGEFILE /* Note: In no-buffer mode, it would be possible to pack the necessary * flags into one byte. Since we wouldn't be buffering and there would * be no support for wchar, the only flags we would need would be: * 2 bits : ungot count * 2 bits : eof + error * 2 bits : readonly + writeonly * 1 bit : freefile * 1 bit : appending * So, for a very small system (< 128 files) we might have a * 4-byte FILE struct of: * unsigned char flags; * signed char filedes; * unsigned char ungot[2]; */ /********************************************************************** * PROTOTYPES OF INTERNAL FUNCTIONS **********************************************************************/ #if defined _LIBC && (defined IS_IN_libc || defined NOT_IN_libc) extern void weak_function _stdio_init(void) attribute_hidden; extern void weak_function _stdio_term(void) attribute_hidden; #ifdef __STDIO_HAS_OPENLIST extern struct __STDIO_FILE_STRUCT *_stdio_openlist; #ifdef __UCLIBC_HAS_THREADS__ __UCLIBC_IO_MUTEX_EXTERN(_stdio_openlist_add_lock) # ifndef __UCLIBC_HAS_THREADS_NATIVE__ attribute_hidden # endif ; #ifdef __STDIO_BUFFERS __UCLIBC_IO_MUTEX_EXTERN(_stdio_openlist_del_lock) # ifndef __UCLIBC_HAS_THREADS_NATIVE__ attribute_hidden # endif ; #endif extern int _stdio_user_locking; #endif #endif #endif /**********************************************************************/ #define __CLEARERR_UNLOCKED(__stream) \ ((void)((__stream)->__modeflags &= ~(__FLAG_EOF|__FLAG_ERROR))) #define __FEOF_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_EOF) #define __FERROR_UNLOCKED(__stream) ((__stream)->__modeflags & __FLAG_ERROR) #ifdef __UCLIBC_HAS_THREADS__ # define __CLEARERR(__stream) (clearerr)(__stream) # define __FERROR(__stream) (ferror)(__stream) # define __FEOF(__stream) (feof)(__stream) #else # define __CLEARERR(__stream) __CLEARERR_UNLOCKED(__stream) # define __FERROR(__stream) __FERROR_UNLOCKED(__stream) # define __FEOF(__stream) __FEOF_UNLOCKED(__stream) #endif extern int __fgetc_unlocked(FILE *__stream); libc_hidden_proto(__fgetc_unlocked) extern int __fputc_unlocked(int __c, FILE *__stream); libc_hidden_proto(__fputc_unlocked) /* First define the default definitions. They are overridden below as necessary. */ #define __FGETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream)) #define __FGETC(__stream) (fgetc)((__stream)) #define __GETC_UNLOCKED_MACRO(__stream) (__fgetc_unlocked)((__stream)) #define __GETC_UNLOCKED(__stream) (__fgetc_unlocked)((__stream)) #define __GETC(__stream) (fgetc)((__stream)) #define __FPUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream)) #define __FPUTC(__c, __stream) (fputc)((__c),(__stream)) #define __PUTC_UNLOCKED_MACRO(__c, __stream) (__fputc_unlocked)((__c),(__stream)) #define __PUTC_UNLOCKED(__c, __stream) (__fputc_unlocked)((__c),(__stream)) #define __PUTC(__c, __stream) (fputc)((__c),(__stream)) #ifdef __STDIO_GETC_MACRO extern FILE *__stdin; /* For getchar() macro. */ # undef __GETC_UNLOCKED_MACRO # define __GETC_UNLOCKED_MACRO(__stream) \ ( ((__stream)->__bufpos < (__stream)->__bufgetc_u) \ ? (*(__stream)->__bufpos++) \ : __fgetc_unlocked(__stream) ) # if 0 /* Classic macro approach. getc{_unlocked} can have side effects. */ # undef __GETC_UNLOCKED # define __GETC_UNLOCKED(__stream) __GETC_UNLOCKED_MACRO((__stream)) # ifndef __UCLIBC_HAS_THREADS__ # undef __GETC # define __GETC(__stream) __GETC_UNLOCKED_MACRO((__stream)) # endif # else /* Using gcc extension for safety and additional inlining. */ # undef __FGETC_UNLOCKED # define __FGETC_UNLOCKED(__stream) \ (__extension__ ({ \ FILE *__S = (__stream); \ __GETC_UNLOCKED_MACRO(__S); \ }) ) # undef __GETC_UNLOCKED # define __GETC_UNLOCKED(__stream) __FGETC_UNLOCKED((__stream)) # ifdef __UCLIBC_HAS_THREADS__ # undef __FGETC # define __FGETC(__stream) \ (__extension__ ({ \ FILE *__S = (__stream); \ ((__S->__user_locking ) \ ? __GETC_UNLOCKED_MACRO(__S) \ : (fgetc)(__S)); \ }) ) # undef __GETC # define __GETC(__stream) __FGETC((__stream)) # else # undef __FGETC # define __FGETC(__stream) __FGETC_UNLOCKED((__stream)) # undef __GETC # define __GETC(__stream) __FGETC_UNLOCKED((__stream)) # endif # endif #else # define __stdin stdin #endif /* __STDIO_GETC_MACRO */ #ifdef __STDIO_PUTC_MACRO extern FILE *__stdout; /* For putchar() macro. */ # undef __PUTC_UNLOCKED_MACRO # define __PUTC_UNLOCKED_MACRO(__c, __stream) \ ( ((__stream)->__bufpos < (__stream)->__bufputc_u) \ ? (*(__stream)->__bufpos++) = (__c) \ : __fputc_unlocked((__c),(__stream)) ) # if 0 /* Classic macro approach. putc{_unlocked} can have side effects.*/ # undef __PUTC_UNLOCKED # define __PUTC_UNLOCKED(__c, __stream) \ __PUTC_UNLOCKED_MACRO((__c), (__stream)) # ifndef __UCLIBC_HAS_THREADS__ # undef __PUTC # define __PUTC(__c, __stream) __PUTC_UNLOCKED_MACRO((__c), (__stream)) # endif # else /* Using gcc extension for safety and additional inlining. */ # undef __FPUTC_UNLOCKED # define __FPUTC_UNLOCKED(__c, __stream) \ (__extension__ ({ \ FILE *__S = (__stream); \ __PUTC_UNLOCKED_MACRO((__c),__S); \ }) ) # undef __PUTC_UNLOCKED # define __PUTC_UNLOCKED(__c, __stream) __FPUTC_UNLOCKED((__c), (__stream)) # ifdef __UCLIBC_HAS_THREADS__ # undef __FPUTC # define __FPUTC(__c, __stream) \ (__extension__ ({ \ FILE *__S = (__stream); \ ((__S->__user_locking) \ ? __PUTC_UNLOCKED_MACRO((__c),__S) \ : (fputc)((__c),__S)); \ }) ) # undef __PUTC # define __PUTC(__c, __stream) __FPUTC((__c), (__stream)) # else # undef __FPUTC # define __FPUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream)) # undef __PUTC # define __PUTC(__c, __stream) __FPUTC_UNLOCKED((__c),(__stream)) # endif # endif #else # define __stdout stdout #endif /* __STDIO_PUTC_MACRO */ |