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) if (__need_unlock) __unlockfile((f)); else
  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 size_t __stdio_read(FILE *, unsigned char *, size_t);
  54 size_t __stdio_write(FILE *, const unsigned char *, size_t);
  55 size_t __stdout_write(FILE *, const unsigned char *, size_t);
  56 off_t __stdio_seek(FILE *, off_t, int);
  57 int __stdio_close(FILE *);
  58
  59 size_t __string_read(FILE *, unsigned char *, size_t);
  60
  61 int __toread(FILE *);
  62 int __towrite(FILE *);
  63
  64 #if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
  65 __attribute__((visibility("protected")))
  66 #endif
  67 int __overflow(FILE *, int), __uflow(FILE *);
  68
  69 int __fseeko(FILE *, off_t, int);
  70 int __fseeko_unlocked(FILE *, off_t, int);
  71 off_t __ftello(FILE *);
  72 off_t __ftello_unlocked(FILE *);
  73 size_t __fwritex(const unsigned char *, size_t, FILE *);
  74 int __putc_unlocked(int, FILE *);
  75
  76 FILE *__fdopen(int, const char *);
  77 int __fmodeflags(const char *);
  78
  79 FILE *__ofl_add(FILE *f);
  80 FILE **__ofl_lock(void);
  81 void __ofl_unlock(void);
  82
  83 #define feof(f) ((f)->flags & F_EOF)
  84 #define ferror(f) ((f)->flags & F_ERR)
  85
  86 #define getc_unlocked(f) \
  87         ( ((f)->rpos < (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
  88
  89 #define putc_unlocked(c, f) ( ((c)!=(f)->lbf && (f)->wpos<(f)->wend) \
  90         ? *(f)->wpos++ = (c) : __overflow((f),(c)) )
  91
  92 /* Caller-allocated FILE * operations */
  93 FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
  94 int __fclose_ca(FILE *);
  95
  96 #endif