src/internal/stdio_impl.h

   1 #ifndef _STDIO_IMPL_H
   2 #define _STDIO_IMPL_H
   3
   4 #include <stdio.h>
   5 #include "syscall.h"
   6
   7 #define UNGET 8
   8
   9 #define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0)
  10 #define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0)
  11 #define FUNLOCK(f) do { if (__need_unlock) __unlockfile((f)); } while (0)
  12
  13 #define F_PERM 1
  14 #define F_NORD 4
  15 #define F_NOWR 8
  16 #define F_EOF 16
  17 #define F_ERR 32
  18 #define F_SVB 64
  19 #define F_APP 128
  20
  21 struct _IO_FILE {
  22         unsigned flags;
  23         unsigned char *rpos, *rend;
  24         int (*close)(FILE *);
  25         unsigned char *wend, *wpos;
  26         unsigned char *mustbezero_1;
  27         unsigned char *wbase;
  28         size_t (*read)(FILE *, unsigned char *, size_t);
  29         size_t (*write)(FILE *, const unsigned char *, size_t);
  30         off_t (*seek)(FILE *, off_t, int);
  31         unsigned char *buf;
  32         size_t buf_size;
  33         FILE *prev, *next;
  34         int fd;
  35         int pipe_pid;
  36         long lockcount;
  37         int mode;
  38         volatile int lock;
  39         int lbf;
  40         void *cookie;
  41         off_t off;
  42         char *getln_buf;
  43         void *mustbezero_2;
  44         unsigned char *shend;
  45         off_t shlim, shcnt;
  46         FILE *prev_locked, *next_locked;
  47         struct __locale_struct *locale;
  48 };
  49
  50 extern hidden FILE *volatile __stdin_used;
  51 extern hidden FILE *volatile __stdout_used;
  52 extern hidden FILE *volatile __stderr_used;
  53
  54 hidden int __lockfile(FILE *);
  55 hidden void __unlockfile(FILE *);
  56
  57 hidden size_t __stdio_read(FILE *, unsigned char *, size_t);
  58 hidden size_t __stdio_write(FILE *, const unsigned char *, size_t);
  59 hidden size_t __stdout_write(FILE *, const unsigned char *, size_t);
  60 hidden off_t __stdio_seek(FILE *, off_t, int);
  61 hidden int __stdio_close(FILE *);
  62
  63 hidden int __toread(FILE *);
  64 hidden int __towrite(FILE *);
  65
  66 hidden void __stdio_exit(void);
  67 hidden void __stdio_exit_needed(void);
  68
  69 #if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
  70 __attribute__((visibility("protected")))
  71 #endif
  72 int __overflow(FILE *, int), __uflow(FILE *);
  73
  74 hidden int __fseeko(FILE *, off_t, int);
  75 hidden int __fseeko_unlocked(FILE *, off_t, int);
  76 hidden off_t __ftello(FILE *);
  77 hidden off_t __ftello_unlocked(FILE *);
  78 hidden size_t __fwritex(const unsigned char *, size_t, FILE *);
  79 hidden int __putc_unlocked(int, FILE *);
  80
  81 hidden FILE *__fdopen(int, const char *);
  82 hidden int __fmodeflags(const char *);
  83
  84 hidden FILE *__ofl_add(FILE *f);
  85 hidden FILE **__ofl_lock(void);
  86 hidden void __ofl_unlock(void);
  87
  88 struct __pthread;
  89 hidden void __register_locked_file(FILE *, struct __pthread *);
  90 hidden void __unlist_locked_file(FILE *);
  91 hidden void __do_orphaned_stdio_locks(void);
  92
  93 #define MAYBE_WAITERS 0x40000000
  94
  95 hidden void __getopt_msg(const char *, const char *, const char *, size_t);
  96
  97 #define feof(f) ((f)->flags & F_EOF)
  98 #define ferror(f) ((f)->flags & F_ERR)
  99
 100 #define getc_unlocked(f) \
 101         ( ((f)->rpos != (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
 102
 103 #define putc_unlocked(c, f) \
 104         ( (((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend)) \
 105         ? *(f)->wpos++ = (unsigned char)(c) \
 106         : __overflow((f),(unsigned char)(c)) )
 107
 108 /* Caller-allocated FILE * operations */
 109 hidden FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
 110 hidden int __fclose_ca(FILE *);
 111
 112 #endif