1#ifndef _STDIO_IMPL_H
2#define _STDIO_IMPL_H
3
4#include <stdio.h>
5#if defined(__wasilibc_unmodified_upstream)
6#include "syscall.h"
7#endif
8
9#define UNGET 8
10
11#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
12#define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0)
13#define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0)
14#define FUNLOCK(f) do { if (__need_unlock) __unlockfile((f)); } while (0)
15#else
16// No locking needed.
17#define FFINALLOCK(f) ((void)(f))
18#define FLOCK(f) ((void)(f))
19#define FUNLOCK(f) ((void)(f))
20#endif
21
22#define F_PERM 1
23#define F_NORD 4
24#define F_NOWR 8
25#define F_EOF 16
26#define F_ERR 32
27#define F_SVB 64
28#define F_APP 128
29
30struct _IO_FILE {
31 unsigned flags;
32 unsigned char *rpos, *rend;
33 int (*close)(FILE *);
34 unsigned char *wend, *wpos;
35#ifdef __wasilibc_unmodified_upstream // WASI doesn't need backwards-compatibility fields.
36 unsigned char *mustbezero_1;
37#endif
38 unsigned char *wbase;
39 size_t (*read)(FILE *, unsigned char *, size_t);
40 size_t (*write)(FILE *, const unsigned char *, size_t);
41 off_t (*seek)(FILE *, off_t, int);
42 unsigned char *buf;
43 size_t buf_size;
44 FILE *prev, *next;
45 int fd;
46#ifdef __wasilibc_unmodified_upstream // WASI has no popen
47 int pipe_pid;
48#endif
49#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
50 long lockcount;
51#endif
52 int mode;
53#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
54 volatile int lock;
55#endif
56 int lbf;
57 void *cookie;
58 off_t off;
59 char *getln_buf;
60#ifdef __wasilibc_unmodified_upstream // WASI doesn't need backwards-compatibility fields.
61 void *mustbezero_2;
62#endif
63 unsigned char *shend;
64 off_t shlim, shcnt;
65#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
66 FILE *prev_locked, *next_locked;
67#endif
68 struct __locale_struct *locale;
69};
70
71extern hidden FILE *volatile __stdin_used;
72extern hidden FILE *volatile __stdout_used;
73extern hidden FILE *volatile __stderr_used;
74
75#if defined(__wasilibc_unmodified_upstream) || defined(_REENTRANT)
76hidden int __lockfile(FILE *);
77hidden void __unlockfile(FILE *);
78#endif
79
80hidden size_t __stdio_read(FILE *, unsigned char *, size_t);
81hidden size_t __stdio_write(FILE *, const unsigned char *, size_t);
82hidden size_t __stdout_write(FILE *, const unsigned char *, size_t);
83hidden off_t __stdio_seek(FILE *, off_t, int);
84hidden int __stdio_close(FILE *);
85
86hidden int __toread(FILE *);
87hidden int __towrite(FILE *);
88
89hidden void __stdio_exit(void);
90hidden void __stdio_exit_needed(void);
91
92#ifdef __wasilibc_unmodified_upstream // wasm has no "protected" visibility
93#if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
94__attribute__((visibility("protected")))
95#endif
96#endif
97int __overflow(FILE *, int), __uflow(FILE *);
98
99hidden int __fseeko(FILE *, off_t, int);
100hidden int __fseeko_unlocked(FILE *, off_t, int);
101hidden off_t __ftello(FILE *);
102hidden off_t __ftello_unlocked(FILE *);
103hidden size_t __fwritex(const unsigned char *, size_t, FILE *);
104hidden int __putc_unlocked(int, FILE *);
105
106hidden FILE *__fdopen(int, const char *);
107hidden int __fmodeflags(const char *);
108
109hidden FILE *__ofl_add(FILE *f);
110hidden FILE **__ofl_lock(void);
111hidden void __ofl_unlock(void);
112
113struct __pthread;
114hidden void __register_locked_file(FILE *, struct __pthread *);
115hidden void __unlist_locked_file(FILE *);
116hidden void __do_orphaned_stdio_locks(void);
117
118#define MAYBE_WAITERS 0x40000000
119
120hidden void __getopt_msg(const char *, const char *, const char *, size_t);
121
122#define feof(f) ((f)->flags & F_EOF)
123#define ferror(f) ((f)->flags & F_ERR)
124
125#define getc_unlocked(f) \
126 ( ((f)->rpos != (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
127
128#define putc_unlocked(c, f) \
129 ( (((unsigned char)(c)!=(f)->lbf && (f)->wpos!=(f)->wend)) \
130 ? *(f)->wpos++ = (unsigned char)(c) \
131 : __overflow((f),(unsigned char)(c)) )
132
133/* Caller-allocated FILE * operations */
134hidden FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
135hidden int __fclose_ca(FILE *);
136
137#endif