4  * SPDX-License-Identifier: Apache-2.0
14 	if ((c >= '0') && (c <= '9')) {  in char2hex()
15 		*x = c - '0';  in char2hex()
17 		*x = c - 'a' + 10;  in char2hex()
19 		*x = c - 'A' + 10;  in char2hex()
21 		return -EINVAL;  in char2hex()
24 	return 0;  in char2hex()
30 		*c = x + (char)'0';  in hex2char()
32 		*c = x - 10 + (char)'a';  in hex2char()
34 		return -EINVAL;  in hex2char()
37 	return 0;  in hex2char()
42 	if (hexlen < ((buflen * 2U) + 1U)) {  in bin2hex()
43 		return 0;  in bin2hex()
46 	for (size_t i = 0; i < buflen; i++) {  in bin2hex()
47 		if (hex2char(buf[i] >> 4, &hex[2U * i]) < 0) {  in bin2hex()
48 			return 0;  in bin2hex()
50 		if (hex2char(buf[i] & 0xf, &hex[2U * i + 1U]) < 0) {  in bin2hex()
51 			return 0;  in bin2hex()
55 	hex[2U * buflen] = '\0';  in bin2hex()
56 	return 2U * buflen;  in bin2hex()
63 	if (buflen < (hexlen / 2U + hexlen % 2U)) {  in hex2bin()
64 		return 0;  in hex2bin()
68 	if ((hexlen % 2U) != 0) {  in hex2bin()
69 		if (char2hex(hex[0], &dec) < 0) {  in hex2bin()
70 			return 0;  in hex2bin()
72 		buf[0] = dec;  in hex2bin()
78 	for (size_t i = 0; i < (hexlen / 2U); i++) {  in hex2bin()
79 		if (char2hex(hex[2U * i], &dec) < 0) {  in hex2bin()
80 			return 0;  in hex2bin()
84 		if (char2hex(hex[2U * i + 1U], &dec) < 0) {  in hex2bin()
85 			return 0;  in hex2bin()
90 	return hexlen / 2U + hexlen % 2U;  in hex2bin()