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- #define BUFSIZ 512
- #define _NFILE 20
- # ifndef FILE
- extern struct _iobuf {
- char *_ptr;
- int _cnt;
- char *_base;
- char _flag;
- char _file;
- } _iob[_NFILE];
- # endif
-
- #define _IOREAD 01
- #define _IOWRT 02
- #define _IONBF 04
- #define _IOMYBUF 010
- #define _IOEOF 020
- #define _IOERR 040
- #define _IOSTRG 0100
- #define _IORW 0200
-
- #define NULL 0
- #define FILE struct _iobuf
- #define EOF (-1)
-
- #define stdin (&_iob[0])
- #define stdout (&_iob[1])
- #define stderr (&_iob[2])
- #define getc(p) (--(p)->_cnt>=0? *(p)->_ptr++&0377:_filbuf(p))
- #define getchar() getc(stdin)
- #define putc(x,p) (--(p)->_cnt>=0? ((int)(*(p)->_ptr++=(unsigned)(x))):_flsbuf((unsigned)(x),p))
- #define putchar(x) putc(x,stdout)
- #define feof(p) (((p)->_flag&_IOEOF)!=0)
- #define ferror(p) (((p)->_flag&_IOERR)!=0)
- #define fileno(p) p->_file
-
- FILE *fopen();
- FILE *freopen();
- FILE *fdopen();
- long ftell();
- char *fgets();
-