14 struct io {  struct
29 static inline void io__init(struct io *io, int fd,  in io__init()  argument
32 	io->fd = fd;  in io__init()
33 	io->buf_len = buf_len;  in io__init()
34 	io->buf = buf;  in io__init()
35 	io->end = buf;  in io__init()
36 	io->data = buf;  in io__init()
37 	io->eof = false;  in io__init()
40 /* Reads one character from the "io" file with similar semantics to fgetc. */
41 static inline int io__get_char(struct io *io)  in io__get_char()  argument
43 	char *ptr = io->data;  in io__get_char()
45 	if (io->eof)  in io__get_char()
48 	if (ptr == io->end) {  in io__get_char()
49 		ssize_t n = read(io->fd, io->buf, io->buf_len);  in io__get_char()
52 			io->eof = true;  in io__get_char()
55 		ptr = &io->buf[0];  in io__get_char()
56 		io->end = &io->buf[n];  in io__get_char()
58 	io->data = ptr + 1;  in io__get_char()
63  * first character isn't hexadecimal returns -2, io->eof returns -1, otherwise
67 static inline int io__get_hex(struct io *io, __u64 *hex)  in io__get_hex()  argument
73 		int ch = io__get_char(io);  in io__get_hex()
92  * isn't a decimal returns -2, io->eof returns -1, otherwise returns the
96 static inline int io__get_dec(struct io *io, __u64 *dec)  in io__get_dec()  argument
102 		int ch = io__get_char(io);  in io__get_dec()