mirror of
https://github.com/systemd/systemd-stable.git
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124 lines
3.0 KiB
C
124 lines
3.0 KiB
C
/*
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* stdio.h
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*/
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#ifndef _STDIO_H
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#define _STDIO_H
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#include <klibc/extern.h>
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#include <stdarg.h>
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#include <stddef.h>
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#include <unistd.h>
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/* This structure doesn't really exist, but it gives us something
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to define FILE * with */
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struct _IO_file;
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typedef struct _IO_file FILE;
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#ifndef EOF
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# define EOF (-1)
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#endif
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#ifndef BUFSIZ
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# define BUFSIZ 4096
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#endif
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#define SEEK_SET 0
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#define SEEK_CUR 1
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#define SEEK_END 2
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/*
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* Convert between a FILE * and a file descriptor. We don't actually
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* have any in-memory data, so we just abuse the pointer itself to
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* hold the data. Note, however, that for file descriptors, -1 is
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* error and 0 is a valid value; for FILE *, NULL (0) is error and
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* non-NULL are valid.
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*/
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static __inline__ int fileno(FILE *__f)
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{
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/* This should really be intptr_t, but size_t should be the same size */
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return (int)(size_t)__f - 1;
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}
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/* This is a macro so it can be used as initializer */
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#define __create_file(__fd) ((FILE *)(size_t)((__fd) + 1))
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#define stdin __create_file(0)
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#define stdout __create_file(1)
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#define stderr __create_file(2)
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__extern FILE *fopen(const char *, const char *);
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static __inline__ FILE *fdopen(int __fd, const char *__m)
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{
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(void)__m; return __create_file(__fd);
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}
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static __inline__ int fclose(FILE *__f)
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{
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extern int close(int);
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return close(fileno(__f));
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}
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static __inline__ int fseek(FILE *__f, off_t __o, int __w)
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{
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extern off_t lseek(int, off_t, int);
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return (lseek(fileno(__f), __o, __w) == (off_t)-1) ? -1 : 0;
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}
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static __inline__ off_t ftell(FILE *__f)
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{
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extern off_t lseek(int, off_t, int);
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return lseek(fileno(__f), 0, SEEK_CUR);
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}
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__extern int fputs(const char *, FILE *);
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__extern int puts(const char *);
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__extern int fputc(int, FILE *);
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#define putc(c,f) fputc((c),(f))
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#define putchar(c) fputc((c),stdout)
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__extern int fgetc(FILE *);
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__extern char * fgets(char *, int, FILE *);
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#define getc(f) fgetc(f)
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__extern size_t _fread(void *, size_t, FILE *);
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__extern size_t _fwrite(const void *, size_t, FILE *);
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#ifndef __NO_FREAD_FWRITE_INLINES
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extern __inline__ size_t
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fread(void *__p, size_t __s, size_t __n, FILE *__f)
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{
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return _fread(__p, __s*__n, __f)/__s;
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}
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extern __inline__ size_t
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fwrite(void *__p, size_t __s, size_t __n, FILE *__f)
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{
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return _fwrite(__p, __s*__n, __f)/__s;
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}
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#endif
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__extern int printf(const char *, ...);
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__extern int vprintf(const char *, va_list);
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__extern int fprintf(FILE *, const char *, ...);
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__extern int vfprintf(FILE *, const char *, va_list);
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__extern int sprintf(char *, const char *, ...);
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__extern int vsprintf(char *, const char *, va_list);
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__extern int snprintf(char *, size_t n, const char *, ...);
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__extern int vsnprintf(char *, size_t n, const char *, va_list);
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/* No buffering, so no flushing needed */
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extern __inline__ int
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fflush(FILE *__f)
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{
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(void)__f;
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return 0;
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}
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__extern int sscanf(const char *, const char *, ...);
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__extern int vsscanf(const char *, const char *, va_list);
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__extern void perror(const char *);
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__extern int rename(const char *, const char *);
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#endif /* _STDIO_H */
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