diff options
Diffstat (limited to 'libio/libioP.h')
| -rw-r--r-- | libio/libioP.h | 497 |
1 files changed, 497 insertions, 0 deletions
diff --git a/libio/libioP.h b/libio/libioP.h new file mode 100644 index 00000000000..7efc519aad5 --- /dev/null +++ b/libio/libioP.h @@ -0,0 +1,497 @@ +/* +Copyright (C) 1993 Free Software Foundation + +This file is part of the GNU IO Library. This library is free +software; you can redistribute it and/or modify it under the +terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) +any later version. + +This library is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this library; see the file COPYING. If not, write to the Free +Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +As a special exception, if you link this library with files +compiled with a GNU compiler to produce an executable, this does not cause +the resulting executable to be covered by the GNU General Public License. +This exception does not however invalidate any other reasons why +the executable file might be covered by the GNU General Public License. */ + +#include <errno.h> +#ifndef errno +extern int errno; +#endif + +#include "iolibio.h" + +#if defined (__STDC__) || defined (_AIX) || (defined (__mips) && defined (_SYSTYPE_SVR4)) || defined(__cplusplus) +/* All known AIX compilers implement these things (but don't always + define __STDC__). The RISC/OS MIPS compiler defines these things + in SVR4 mode, but does not define __STDC__. */ + +#define AND , +#define DEFUN(name, arglist, args) name(args) +#define DEFUN_VOID(name) name(void) + +#else /* Not ANSI C. */ + +#define AND ; +#ifndef const /* some systems define it in header files for non-ansi mode */ +#define const +#endif +#define DEFUN(name, arglist, args) name arglist args; +#define DEFUN_VOID(name) name() +#endif /* ANSI C. */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define _IO_seek_set 0 +#define _IO_seek_cur 1 +#define _IO_seek_end 2 + +/* THE JUMPTABLE FUNCTIONS. + + * The _IO_FILE type is used to implement the FILE type in GNU libc, + * as well as the streambuf class in GNU iostreams for C++. + * These are all the same, just used differently. + * An _IO_FILE (or FILE) object is allows followed by a pointer to + * a jump table (of pointers to functions). The pointer is accessed + * with the _IO_JUMPS macro. The jump table has a eccentric format, + * so as to be compatible with the layout of a C++ virtual function table. + * (as implemented by g++). When a pointer to a steambuf object is + * coerced to an (_IO_FILE*), then _IO_JUMPS on the result just + * happens to point to the virtual function table of the streambuf. + * Thus the _IO_JUMPS function table used for C stdio/libio does + * double duty as the virtual functiuon table for C++ streambuf. + * + * The entries in the _IO_JUMPS function table (and hence also the + * virtual functions of a streambuf) are described below. + * The first parameter of each function entry is the _IO_FILE/streambuf + * object being acted on (i.e. the 'this' parameter). + */ + +#define _IO_JUMPS(THIS) ((struct _IO_FILE_plus*)(THIS))->vtable +#ifdef _G_USING_THUNKS +#define JUMP_FIELD(TYPE, NAME) TYPE NAME +#define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC(THIS) +#define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC(THIS, X1) +#define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC(THIS, X1, X2) +#define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC(THIS, X1,X2, X3) +#define JUMP_INIT(NAME, VALUE) VALUE +#define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0), JUMP_INIT(dummy2, 0) +#else +/* These macros will change when we re-implement vtables to use "thunks"! */ +#define JUMP_FIELD(TYPE, NAME) struct { short delta1, delta2; TYPE pfn; } NAME +#define JUMP0(FUNC, THIS) _IO_JUMPS(THIS)->FUNC.pfn(THIS) +#define JUMP1(FUNC, THIS, X1) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1) +#define JUMP2(FUNC, THIS, X1, X2) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1, X2) +#define JUMP3(FUNC, THIS, X1,X2,X3) _IO_JUMPS(THIS)->FUNC.pfn(THIS, X1,X2, X3) +#define JUMP_INIT(NAME, VALUE) {0, 0, VALUE} +#define JUMP_INIT_DUMMY JUMP_INIT(dummy, 0) +#endif + +/* The 'finish' function does any final cleaning up of an _IO_FILE object. + It does not delete (free) it, but does everything else to finalize it/ + It matches the streambuf::~streambuf virtual destructor. */ +typedef void (*_IO_finish_t) __P((_IO_FILE*)); /* finalize */ +#define _IO_FINISH(FP) JUMP0(__finish, FP) + +/* The 'overflow' hook flushes the buffer. + The second argument is a character, or EOF. + It matches the streambuf::overflow virtual function. */ +typedef int (*_IO_overflow_t) __P((_IO_FILE*, int)); +#define _IO_OVERFLOW(FP, CH) JUMP1(__overflow, FP, CH) + +/* The 'underflow' hook tries to fills the get buffer. + It returns the next character (as an unsigned char) or EOF. The next + character remains in the get buffer, and the get postion is not changed. + It matches the streambuf::underflow virtual function. */ +typedef int (*_IO_underflow_t) __P((_IO_FILE*)); +#define _IO_UNDERFLOW(FP) JUMP0(__underflow, FP) + +/* The 'uflow' hook returns the next character in the input stream + (cast to unsigned char), and increments the read position; + EOF is returned on failure. + It matches the streambuf::uflow virtual function, which is not in the + cfront implementation, but was added to C++ by the ANSI/ISO committee. */ +#define _IO_UFLOW(FP) JUMP0(__uflow, FP) + +/* The 'pbackfail' hook handles backing up. + It matches the streambuf::pbackfail virtual function. */ +typedef int (*_IO_pbackfail_t) __P((_IO_FILE*, int)); +#define _IO_PBACKFAIL(FP, CH) JUMP1(__pbackfail, FP, CH) + +/* The 'xsputn' hook writes upto N characters from buffer DATA. + Returns the number of character actually written. + It matches the streambuf::xsputn virtual function. */ +typedef _IO_size_t (*_IO_xsputn_t) + __P((_IO_FILE *FP, const void *DATA, _IO_size_t N)); +#define _IO_XSPUTN(FP, DATA, N) JUMP2(__xsputn, FP, DATA, N) + +/* The 'xsgetn' hook reads upto N characters into buffer DATA. + Returns the number of character actually read. + It matches the streambuf::xsgetn virtual function. */ +typedef _IO_size_t (*_IO_xsgetn_t) __P((_IO_FILE*FP, void*DATA, _IO_size_t N)); +#define _IO_XSGETN(FP, DATA, N) JUMP2(__xsgetn, FP, DATA, N) + +/* The 'seekoff' hook moves the stream position to a new position + relative to the start of the file (if DIR==0), the current position + (MODE==1), or the end of the file (MODE==2). + It matches the streambuf::seekoff virtual function. + It is also used for the ANSI fseek function. */ +typedef _IO_fpos_t (*_IO_seekoff_t) + __P((_IO_FILE* FP, _IO_off_t OFF, int DIR, int MODE)); +#define _IO_SEEKOFF(FP, OFF, DIR, MODE) JUMP3(__seekoff, FP, OFF, DIR, MODE) + +/* The 'seekpos' hook also moves the stream position, + but to an absolute position given by a fpos_t (seekpos). + It matches the streambuf::seekpos virtual function. + It is also used for the ANSI fgetpos and fsetpos functions. */ +/* The _IO_seek_cur and _IO_seek_end options are not allowed. */ +typedef _IO_fpos_t (*_IO_seekpos_t) __P((_IO_FILE*, _IO_fpos_t, int)); +#define _IO_SEEKPOS(FP, POS, FLAGS) JUMP2(__seekpos, FP, POS, FLAGS) + +/* The 'setbuf' hook gives a buffer to the file. + It matches the streambuf::setbuf virtual function. */ +typedef _IO_FILE* (*_IO_setbuf_t) __P((_IO_FILE*, char *, _IO_ssize_t)); +#define _IO_SETBUF(FP, BUFFER, LENGTH) JUMP2(__setbuf, FP, BUFFER, LENGTH) + +/* The 'sync' hook attempts to synchronize the internal data structures + of the file with the external state. + It matches the streambuf::sync virtual function. */ +typedef int (*_IO_sync_t) __P((_IO_FILE*)); +#define _IO_SYNC(FP) JUMP0(__sync, FP) + +/* The 'doallocate' hook is used to tell the file to allocate a buffer. + It matches the streambuf::doallocate virtual function, which is not + in the ANSI/ISO C++ standard, but is part traditional implementations. */ +typedef int (*_IO_doallocate_t) __P((_IO_FILE*)); +#define _IO_DOALLOCATE(FP) JUMP0(__doallocate, FP) + +/* The following four hooks (sysread, syswrite, sysclose, sysseek, and + sysstat) are low-level hooks specific to this implementation. + There is no correspondance in the ANSI/ISO C++ standard library. + The hooks basically correspond to the Unix system functions + (read, write, close, lseek, and stat) except that a _IO_FILE* + parameter is used instead of a integer file descriptor; the default + implementation used for normal files just calls those functions. + The advantage of overriding these functions instead of the higher-level + ones (underflow, overflow etc) is that you can leave all the buffering + higher-level functions. */ + +/* The 'sysread' hook is used to read data from the external file into + an existing buffer. It generalizes the Unix read(2) function. + It matches the streambuf::sys_read virtual function, which is + specific to this implementaion. */ +typedef _IO_ssize_t (*_IO_read_t) __P((_IO_FILE*, void*, _IO_ssize_t)); +#define _IO_SYSREAD(FP, DATA, LEN) JUMP2(__read, FP, DATA, LEN) + +/* The 'syswrite' hook is used to write data from an existing buffer + to an external file. It generalizes the Unix write(2) function. + It matches the streambuf::sys_write virtual function, which is + specific to this implementaion. */ +typedef _IO_ssize_t (*_IO_write_t) __P((_IO_FILE*,const void*,_IO_ssize_t)); +#define _IO_SYSWRITE(FP, DATA, LEN) JUMP2(__write, FP, DATA, LEN) + +/* The 'sysseek' hook is used to re-position an external file. + It generalizes the Unix lseek(2) function. + It matches the streambuf::sys_seek virtual function, which is + specific to this implementaion. */ +typedef _IO_fpos_t (*_IO_seek_t) __P((_IO_FILE*, _IO_off_t, int)); +#define _IO_SYSSEEK(FP, OFFSET, MODE) JUMP2(__seek, FP, OFFSET, MODE) + +/* The 'sysclose' hook is used to finalize (close, finish up) an + external file. It generalizes the Unix close(2) function. + It matches the streambuf::sys_close virtual function, which is + specific to this implementation. */ +typedef int (*_IO_close_t) __P((_IO_FILE*)); /* finalize */ +#define _IO_SYSCLOSE(FP) JUMP0(__close, FP) + +/* The 'sysstat' hook is used to get information about an external file + into a struct stat buffer. It generalizes the Unix fstat(2) call. + It matches the streambuf::sys_stat virtual function, which is + specific to this implementaion. */ +typedef int (*_IO_stat_t) __P((_IO_FILE*, void*)); +#define _IO_SYSSTAT(FP, BUF) JUMP1(__stat, FP, BUF) + + +#define _IO_CHAR_TYPE char /* unsigned char ? */ +#define _IO_INT_TYPE int + +struct _IO_jump_t { + JUMP_FIELD(_G_size_t, __dummy); +#ifdef _G_USING_THUNKS + JUMP_FIELD(_G_size_t, __dummy2); +#endif + JUMP_FIELD(_IO_finish_t, __finish); + JUMP_FIELD(_IO_overflow_t, __overflow); + JUMP_FIELD(_IO_underflow_t, __underflow); + JUMP_FIELD(_IO_underflow_t, __uflow); + JUMP_FIELD(_IO_pbackfail_t, __pbackfail); + /* showmany */ + JUMP_FIELD(_IO_xsputn_t, __xsputn); + JUMP_FIELD(_IO_xsgetn_t, __xsgetn); + JUMP_FIELD(_IO_seekoff_t, __seekoff); + JUMP_FIELD(_IO_seekpos_t, __seekpos); + JUMP_FIELD(_IO_setbuf_t, __setbuf); + JUMP_FIELD(_IO_sync_t, __sync); + JUMP_FIELD(_IO_doallocate_t, __doallocate); + JUMP_FIELD(_IO_read_t, __read); + JUMP_FIELD(_IO_write_t, __write); + JUMP_FIELD(_IO_seek_t, __seek); + JUMP_FIELD(_IO_close_t, __close); + JUMP_FIELD(_IO_stat_t, __stat); +#if 0 + get_column; + set_column; +#endif +}; + +/* We always allocate an extra word following an _IO_FILE. + This contains a pointer to the function jump table used. + This is for compatibility with C++ streambuf; the word can + be used to smash to a pointer to a virtual function table. */ + +struct _IO_FILE_plus { + _IO_FILE file; + const struct _IO_jump_t *vtable; +}; + +/* Generic functions */ + +extern int _IO_switch_to_get_mode __P((_IO_FILE*)); +extern void _IO_init __P((_IO_FILE*, int)); +extern int _IO_sputbackc __P((_IO_FILE*, int)); +extern int _IO_sungetc __P((_IO_FILE*)); +extern void _IO_un_link __P((_IO_FILE*)); +extern void _IO_link_in __P((_IO_FILE *)); +extern void _IO_doallocbuf __P((_IO_FILE*)); +extern void _IO_unsave_markers __P((_IO_FILE*)); +extern void _IO_setb __P((_IO_FILE*, char*, char*, int)); +extern unsigned _IO_adjust_column __P((unsigned, const char *, int)); +#define _IO_sputn(__fp, __s, __n) _IO_XSPUTN(__fp, __s, __n) + +/* Marker-related function. */ + +extern void _IO_init_marker __P((struct _IO_marker *, _IO_FILE *)); +extern void _IO_remove_marker __P((struct _IO_marker*)); +extern int _IO_marker_difference __P((struct _IO_marker *, struct _IO_marker *)); +extern int _IO_marker_delta __P((struct _IO_marker *)); +extern int _IO_seekmark __P((_IO_FILE *, struct _IO_marker *, int)); + +/* Default jumptable functions. */ + +extern int _IO_default_underflow __P((_IO_FILE*)); +extern int _IO_default_uflow __P((_IO_FILE*)); +extern int _IO_default_doallocate __P((_IO_FILE*)); +extern void _IO_default_finish __P((_IO_FILE *)); +extern int _IO_default_pbackfail __P((_IO_FILE*, int)); +extern _IO_FILE* _IO_default_setbuf __P((_IO_FILE *, char*, _IO_ssize_t)); +extern _IO_size_t _IO_default_xsputn __P((_IO_FILE *, const void*, _IO_size_t)); +extern _IO_size_t _IO_default_xsgetn __P((_IO_FILE *, void*, _IO_size_t)); +extern _IO_fpos_t _IO_default_seekoff __P((_IO_FILE*, _IO_off_t, int, int)); +extern _IO_fpos_t _IO_default_seekpos __P((_IO_FILE*, _IO_fpos_t, int)); +extern _IO_ssize_t _IO_default_write __P((_IO_FILE*,const void*,_IO_ssize_t)); +extern _IO_ssize_t _IO_default_read __P((_IO_FILE*, void*, _IO_ssize_t)); +extern int _IO_default_stat __P((_IO_FILE*, void*)); +extern _IO_fpos_t _IO_default_seek __P((_IO_FILE*, _IO_off_t, int)); +extern int _IO_default_sync __P((_IO_FILE*)); +#define _IO_default_close ((_IO_close_t)_IO_default_sync) + +extern struct _IO_jump_t _IO_file_jumps; +extern struct _IO_jump_t _IO_streambuf_jumps; +extern struct _IO_jump_t _IO_proc_jumps; +extern struct _IO_jump_t _IO_str_jumps; +extern int _IO_do_write __P((_IO_FILE*, const char*, _IO_size_t)); +extern int _IO_flush_all __P((void)); +extern void _IO_cleanup __P((void)); +extern void _IO_flush_all_linebuffered __P((void)); + +#define _IO_do_flush(_f) \ + _IO_do_write(_f, (_f)->_IO_write_base, \ + (_f)->_IO_write_ptr-(_f)->_IO_write_base) +#define _IO_in_put_mode(_fp) ((_fp)->_flags & _IO_CURRENTLY_PUTTING) +#define _IO_mask_flags(fp, f, mask) \ + ((fp)->_flags = ((fp)->_flags & ~(mask)) | ((f) & (mask))) +#define _IO_setg(fp, eb, g, eg) ((fp)->_IO_read_base = (eb),\ + (fp)->_IO_read_ptr = (g), (fp)->_IO_read_end = (eg)) +#define _IO_setp(__fp, __p, __ep) \ + ((__fp)->_IO_write_base = (__fp)->_IO_write_ptr = __p, (__fp)->_IO_write_end = (__ep)) +#define _IO_have_backup(fp) ((fp)->_IO_save_base != NULL) +#define _IO_in_backup(fp) ((fp)->_flags & _IO_IN_BACKUP) +#define _IO_have_markers(fp) ((fp)->_markers != NULL) +#define _IO_blen(fp) ((fp)->_IO_buf_end - (fp)->_IO_buf_base) + +/* Jumptable functions for files. */ + +extern int _IO_file_doallocate __P((_IO_FILE*)); +extern _IO_FILE* _IO_file_setbuf __P((_IO_FILE *, char*, _IO_ssize_t)); +extern _IO_fpos_t _IO_file_seekoff __P((_IO_FILE*, _IO_off_t, int, int)); +extern _IO_size_t _IO_file_xsputn __P((_IO_FILE*,const void*,_IO_size_t)); +extern int _IO_file_stat __P((_IO_FILE*, void*)); +extern int _IO_file_close __P((_IO_FILE*)); +extern int _IO_file_underflow __P((_IO_FILE *)); +extern int _IO_file_overflow __P((_IO_FILE *, int)); +#define _IO_file_is_open(__fp) ((__fp)->_fileno >= 0) +extern void _IO_file_init __P((_IO_FILE*)); +extern _IO_FILE* _IO_file_fopen __P((_IO_FILE*, const char*, const char*)); +extern _IO_ssize_t _IO_file_write __P((_IO_FILE*,const void*,_IO_ssize_t)); +extern _IO_ssize_t _IO_file_read __P((_IO_FILE*, void*, _IO_ssize_t)); +extern int _IO_file_sync __P((_IO_FILE*)); +extern int _IO_file_close_it __P((_IO_FILE*)); +extern _IO_fpos_t _IO_file_seek __P((_IO_FILE *, _IO_off_t, int)); +extern void _IO_file_finish __P((_IO_FILE*)); + +/* Other file functions. */ +extern _IO_FILE* _IO_file_attach __P((_IO_FILE *, int)); + +/* Jumptable functions for proc_files. */ +extern _IO_FILE* _IO_proc_open __P((_IO_FILE*, const char*, const char *)); +extern int _IO_proc_close __P((_IO_FILE*)); + +/* Jumptable functions for strfiles. */ +extern int _IO_str_underflow __P((_IO_FILE*)); +extern int _IO_str_overflow __P((_IO_FILE *, int)); +extern int _IO_str_pbackfail __P((_IO_FILE*, int)); +extern _IO_fpos_t _IO_str_seekoff __P((_IO_FILE*,_IO_off_t,int,int)); + +/* Other strfile functions */ +extern void _IO_str_init_static __P((_IO_FILE *, char*, int, char*)); +extern void _IO_str_init_readonly __P((_IO_FILE *, const char*, int)); +extern _IO_ssize_t _IO_str_count __P ((_IO_FILE*)); + +extern _IO_size_t _IO_getline __P((_IO_FILE*,char*,_IO_size_t,int,int)); +extern _IO_ssize_t _IO_getdelim __P((char**, _IO_size_t*, int, _IO_FILE*)); +extern double _IO_strtod __P((const char *, char **)); +extern char * _IO_dtoa __P((double __d, int __mode, int __ndigits, + int *__decpt, int *__sign, char **__rve)); +extern int _IO_outfloat __P((double __value, _IO_FILE *__sb, int __type, + int __width, int __precision, int __flags, + int __sign_mode, int __fill)); + +extern _IO_FILE *_IO_list_all; +extern void (*_IO_cleanup_registration_needed) __P ((void)); + +#ifndef EOF +#define EOF (-1) +#endif +#ifndef NULL +#ifdef __GNUG__ +#define NULL (__null) +#else +#if !defined(__cplusplus) +#define NULL ((void*)0) +#else +#define NULL (0) +#endif +#endif +#endif + +#define FREE_BUF(_B) free(_B) +#define ALLOC_BUF(_S) (char*)malloc(_S) + +#ifndef OS_FSTAT +#define OS_FSTAT fstat +#endif +struct stat; +extern _IO_ssize_t _IO_read __P((int, void*, _IO_size_t)); +extern _IO_ssize_t _IO_write __P((int, const void*, _IO_size_t)); +extern _IO_off_t _IO_lseek __P((int, _IO_off_t, int)); +extern int _IO_close __P((int)); +extern int _IO_fstat __P((int, struct stat *)); + +/* Operations on _IO_fpos_t. + Normally, these are trivial, but we provide hooks for configurations + where an _IO_fpos_t is a struct. + Note that _IO_off_t must be an integral type. */ + +/* _IO_pos_BAD is an _IO_fpos_t value indicating error, unknown, or EOF. */ +#ifndef _IO_pos_BAD +#define _IO_pos_BAD ((_IO_fpos_t)(-1)) +#endif +/* _IO_pos_as_off converts an _IO_fpos_t value to an _IO_off_t value. */ +#ifndef _IO_pos_as_off +#define _IO_pos_as_off(__pos) ((_IO_off_t)(__pos)) +#endif +/* _IO_pos_adjust adjust an _IO_fpos_t by some number of bytes. */ +#ifndef _IO_pos_adjust +#define _IO_pos_adjust(__pos, __delta) ((__pos) += (__delta)) +#endif +/* _IO_pos_0 is an _IO_fpos_t value indicating beginning of file. */ +#ifndef _IO_pos_0 +#define _IO_pos_0 ((_IO_fpos_t)0) +#endif + +#ifdef __cplusplus +} +#endif + +/* check following! */ +#define FILEBUF_LITERAL(CHAIN, FLAGS, FD) \ + { _IO_MAGIC+_IO_LINKED+_IO_IS_FILEBUF+FLAGS, \ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, CHAIN, FD} + +/* VTABLE_LABEL defines NAME as of the CLASS class. + CNLENGTH is strlen(#CLASS). */ +#ifdef __GNUC__ +#if _G_VTABLE_LABEL_HAS_LENGTH +#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \ + extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CNLENGTH #CLASS); +#else +#define VTABLE_LABEL(NAME, CLASS, CNLENGTH) \ + extern char NAME[] asm (_G_VTABLE_LABEL_PREFIX #CLASS); +#endif +#endif /* __GNUC__ */ + +#if !defined(builtinbuf_vtable) && defined(__cplusplus) +#ifdef __GNUC__ +VTABLE_LABEL(builtinbuf_vtable, builtinbuf, 10) +#else +#if _G_VTABLE_LABEL_HAS_LENGTH +#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##10builtinbuf +#else +#define builtinbuf_vtable _G_VTABLE_LABEL_PREFIX_ID##builtinbuf +#endif +#endif +#endif /* !defined(builtinbuf_vtable) && defined(__cplusplus) */ + +#if defined(__STDC__) || defined(__cplusplus) +#define _IO_va_start(args, last) va_start(args, last) +#else +#define _IO_va_start(args, last) va_start(args) +#endif + +extern struct _IO_fake_stdiobuf _IO_stdin_buf, _IO_stdout_buf, _IO_stderr_buf; + +#if 1 +#define COERCE_FILE(FILE) /* Nothing */ +#else +/* This is part of the kludge for binary compatibility with old stdio. */ +#define COERCE_FILE(FILE) \ + (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) == _OLD_MAGIC_MASK \ + && (FILE) = *(FILE**)&((int*)fp)[1]) +#endif + +#ifdef EINVAL +#define MAYBE_SET_EINVAL errno = EINVAL +#else +#define MAYBE_SET_EINVAL /* nothing */ +#endif + +#ifdef DEBUG +#define CHECK_FILE(FILE,RET) \ + if ((FILE) == NULL) { MAYBE_SET_EINVAL; return RET; } \ + else { COERCE_FILE(FILE); \ + if (((FILE)->_IO_file_flags & _IO_MAGIC_MASK) != _IO_MAGIC) \ + { errno = EINVAL; return RET; }} +#else +#define CHECK_FILE(FILE,RET) \ + COERCE_FILE(FILE) +#endif |