1 /* SPDX-License-Identifier: GPL-2.0 */
31 	io->fd = fd;  in io__init()
32 	io->buf_len = buf_len;  in io__init()
33 	io->buf = buf;  in io__init()
34 	io->end = buf;  in io__init()
35 	io->data = buf;  in io__init()
36 	io->eof = false;  in io__init()
42 	char *ptr = io->data;  in io__get_char()
44 	if (io->eof)  in io__get_char()
45 		return -1;  in io__get_char()
47 	if (ptr == io->end) {  in io__get_char()
48 		ssize_t n = read(io->fd, io->buf, io->buf_len);  in io__get_char()
51 			io->eof = true;  in io__get_char()
52 			return -1;  in io__get_char()
54 		ptr = &io->buf[0];  in io__get_char()
55 		io->end = &io->buf[n];  in io__get_char()
57 	io->data = ptr + 1;  in io__get_char()
62  * first character isn't hexadecimal returns -2, io->eof returns -1, otherwise
63  * returns the character after the hexadecimal value which may be -1 for eof.
64  * If the read value is larger than a u64 the high-order bits will be dropped.
72 		int ch = io__get_char(io);  in io__get_hex()  local
74 		if (ch < 0)  in io__get_hex()
75 			return ch;  in io__get_hex()
76 		if (ch >= '0' && ch <= '9')  in io__get_hex()
77 			*hex = (*hex << 4) | (ch - '0');  in io__get_hex()
78 		else if (ch >= 'a' && ch <= 'f')  in io__get_hex()
79 			*hex = (*hex << 4) | (ch - 'a' + 10);  in io__get_hex()
80 		else if (ch >= 'A' && ch <= 'F')  in io__get_hex()
81 			*hex = (*hex << 4) | (ch - 'A' + 10);  in io__get_hex()
83 			return -2;  in io__get_hex()
85 			return ch;  in io__get_hex()
91  * isn't a decimal returns -2, io->eof returns -1, otherwise returns the
92  * character after the decimal value which may be -1 for eof. If the read value
93  * is larger than a u64 the high-order bits will be dropped.
101 		int ch = io__get_char(io);  in io__get_dec()  local
103 		if (ch < 0)  in io__get_dec()
104 			return ch;  in io__get_dec()
105 		if (ch >= '0' && ch <= '9')  in io__get_dec()
106 			*dec = (*dec * 10) + ch - '0';  in io__get_dec()
108 			return -2;  in io__get_dec()
110 			return ch;  in io__get_dec()