mirror of
https://github.com/fluencelabs/musl
synced 2025-05-03 02:52:16 +00:00
1b0cdc8700
functions which open in-memory FILE stream variants all shared a tail with __fdopen, adding the FILE structure to stdio's open file list. replacing this common tail with a function call reduces code size and duplication of logic. the list is also partially encapsulated now. function signatures were chosen to facilitate tail call optimization and reduce the need for additional accessor functions. with these changes, static linked programs that do not use stdio no longer have an open file list at all.
97 lines
2.4 KiB
C
97 lines
2.4 KiB
C
#ifndef _STDIO_IMPL_H
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#define _STDIO_IMPL_H
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#include <stdio.h>
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#include "syscall.h"
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#include "libc.h"
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#define UNGET 8
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#define FFINALLOCK(f) ((f)->lock>=0 ? __lockfile((f)) : 0)
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#define FLOCK(f) int __need_unlock = ((f)->lock>=0 ? __lockfile((f)) : 0)
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#define FUNLOCK(f) if (__need_unlock) __unlockfile((f)); else
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#define F_PERM 1
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#define F_NORD 4
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#define F_NOWR 8
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#define F_EOF 16
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#define F_ERR 32
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#define F_SVB 64
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#define F_APP 128
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struct _IO_FILE {
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unsigned flags;
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unsigned char *rpos, *rend;
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int (*close)(FILE *);
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unsigned char *wend, *wpos;
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unsigned char *mustbezero_1;
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unsigned char *wbase;
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size_t (*read)(FILE *, unsigned char *, size_t);
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size_t (*write)(FILE *, const unsigned char *, size_t);
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off_t (*seek)(FILE *, off_t, int);
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unsigned char *buf;
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size_t buf_size;
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FILE *prev, *next;
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int fd;
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int pipe_pid;
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long lockcount;
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short dummy3;
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signed char mode;
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signed char lbf;
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volatile int lock;
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volatile int waiters;
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void *cookie;
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off_t off;
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char *getln_buf;
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void *mustbezero_2;
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unsigned char *shend;
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off_t shlim, shcnt;
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FILE *prev_locked, *next_locked;
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struct __locale_struct *locale;
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};
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size_t __stdio_read(FILE *, unsigned char *, size_t);
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size_t __stdio_write(FILE *, const unsigned char *, size_t);
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size_t __stdout_write(FILE *, const unsigned char *, size_t);
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off_t __stdio_seek(FILE *, off_t, int);
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int __stdio_close(FILE *);
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size_t __string_read(FILE *, unsigned char *, size_t);
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int __toread(FILE *);
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int __towrite(FILE *);
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#if defined(__PIC__) && (100*__GNUC__+__GNUC_MINOR__ >= 303)
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__attribute__((visibility("protected")))
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#endif
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int __overflow(FILE *, int), __uflow(FILE *);
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int __fseeko(FILE *, off_t, int);
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int __fseeko_unlocked(FILE *, off_t, int);
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off_t __ftello(FILE *);
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off_t __ftello_unlocked(FILE *);
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size_t __fwritex(const unsigned char *, size_t, FILE *);
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int __putc_unlocked(int, FILE *);
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FILE *__fdopen(int, const char *);
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int __fmodeflags(const char *);
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FILE *__ofl_add(FILE *f);
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FILE **__ofl_lock(void);
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void __ofl_unlock(void);
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#define feof(f) ((f)->flags & F_EOF)
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#define ferror(f) ((f)->flags & F_ERR)
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#define getc_unlocked(f) \
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( ((f)->rpos < (f)->rend) ? *(f)->rpos++ : __uflow((f)) )
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#define putc_unlocked(c, f) ( ((c)!=(f)->lbf && (f)->wpos<(f)->wend) \
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? *(f)->wpos++ = (c) : __overflow((f),(c)) )
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/* Caller-allocated FILE * operations */
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FILE *__fopen_rb_ca(const char *, FILE *, unsigned char *, size_t);
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int __fclose_ca(FILE *);
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#endif
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