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 #include "libc.h"
   7
   8 #define UNGET 8
   9
  10 #define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0)
  11 #define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0)
  12 #define FUNLOCK(f) do { if (__need_unlock) __unlockfile((f)); } while (0)
  13
  14 #define F_PERM 1
  15 #define F_NORD 4
  16 #define F_NOWR 8
  17 #define F_EOF 16
  18 #define F_ERR 32
  19 #define F_SVB 64
  20 #define F_APP 128
  21
  22 struct _IO_FILE {
  23         unsigned flags;
  24         unsigned char *rpos, *rend;
  25         int (*close)(FILE *);
  26         unsigned char *wend, *wpos;
  27         unsigned char *mustbezero_1;
  28         unsigned char *wbase;
  29         size_t (*read)(FILE *, unsigned char *, size_t);
  30         size_t (*write)(FILE *, const unsigned char *, size_t);
  31         off_t (*seek)(FILE *, off_t, int);
  32         unsigned char *buf;
  33         size_t buf_size;
  34         FILE *prev, *next;
  35         int fd;
  36         int pipe_pid;
  37         long lockcount;
  38         short dummy3;
  39         signed char mode;
  40         signed char lbf;
  41         volatile int lock;
  42         volatile int waiters;
  43         void *cookie;
  44         off_t off;
  45         char *getln_buf;
  46         void *mustbezero_2;
  47         unsigned char *shend;
  48         off_t shlim, shcnt;
  49         FILE *prev_locked, *next_locked;
  50         struct __locale_struct *locale;
  51 };
  52
  53 hidden size_t __stdio_read(FILE *, unsigned char *, size_t);
  54 hidden size_t __stdio_write(FILE *, const unsigned char *, size_t);
  55 hidden size_t __stdout_write(FILE *, const unsigned char *, size_t);
  56 hidden off_t __stdio_seek(FILE *, off_t, int);
  57 hidden int __stdio_close(FILE *);
  58
  59 hidden size_t __string_read(FILE *, unsigned char *, size_t);
  60
  61 hidden int __toread(FILE *);
  62 hidden int __towrite(FILE *);
  63
  64 hidden void __stdio_exit_needed(void);
  65
  66 #if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
  67 __attribute__((visibility("protected")))
  68 #endif
  69 int __overflow(FILE *, int), __uflow(FILE *);
  70
  71 hidden int __fseeko(FILE *, off_t, int);
  72 hidden int __fseeko_unlocked(FILE *, off_t, int);
  73 hidden off_t __ftello(FILE *);
  74 hidden off_t __ftello_unlocked(FILE *);
  75 hidden size_t __fwritex(const unsigned char *, size_t, FILE *);
  76 hidden int __putc_unlocked(int, FILE *);
  77
  78 hidden FILE *__fdopen(int, const char *);
  79 hidden int __fmodeflags(const char *);
  80
  81 hidden FILE *__ofl_add(FILE *f);
  82 hidden FILE **__ofl_lock(void);
  83 hidden void __ofl_unlock(void);
  84
  85 struct __pthread;
  86 hidden void __register_locked_file(FILE *, struct __pthread *);
  87 hidden void __unlist_locked_file(FILE *);
  88 hidden void __do_orphaned_stdio_locks(void);
  89
  90 hidden void __getopt_msg(const char *, const char *, const char *, size_t);
  91
  92 #define feof(f) ((f)->flags & F_EOF)
  93 #define ferror(f) ((f)->flags & F_ERR)
  94
  95 #define getc_unlocked(f) \
  96         ( ((f)->rpos < (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
  97
  98 #define putc_unlocked(c, f) \
  99         ( ((unsigned char)(c)!=(f)->lbf && (f)->wpos<(f)->wend) \
 100         ? *(f)->wpos++ = (c) : __overflow((f),(c)) )
 101
 102 /* Caller-allocated FILE * operations */
 103 hidden FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
 104 hidden int __fclose_ca(FILE *);
 105
 106 #endif