1 /* SPDX-License-Identifier: GPL-2.0+ */ 2 /* 3 * Copyright (C) 2018 Synopsys, Inc. All rights reserved. 4 * 5 */ 6 7 #ifndef HEXDUMP_H 8 #define HEXDUMP_H 9 10 #include <linux/ctype.h> 11 #include <linux/types.h> 12 13 enum { 14 DUMP_PREFIX_NONE, 15 DUMP_PREFIX_ADDRESS, 16 DUMP_PREFIX_OFFSET 17 }; 18 19 extern const char hex_asc[]; 20 #define hex_asc_lo(x) hex_asc[((x) & 0x0f)] 21 #define hex_asc_hi(x) hex_asc[((x) & 0xf0) >> 4] 22 23 static inline char *hex_byte_pack(char *buf, u8 byte) 24 { 25 *buf++ = hex_asc_hi(byte); 26 *buf++ = hex_asc_lo(byte); 27 return buf; 28 } 29 30 /** 31 * hex_to_bin - convert a hex digit to its real value 32 * @ch: ascii character represents hex digit 33 * 34 * hex_to_bin() converts one hex digit to its actual value or -1 in case of bad 35 * input. 36 */ 37 static inline int hex_to_bin(char ch) 38 { 39 if ((ch >= '0') && (ch <= '9')) 40 return ch - '0'; 41 ch = tolower(ch); 42 if ((ch >= 'a') && (ch <= 'f')) 43 return ch - 'a' + 10; 44 return -1; 45 } 46 47 /** 48 * hex2bin - convert an ascii hexadecimal string to its binary representation 49 * @dst: binary result 50 * @src: ascii hexadecimal string 51 * @count: result length 52 * 53 * Return 0 on success, -1 in case of bad input. 54 */ 55 static inline int hex2bin(u8 *dst, const char *src, size_t count) 56 { 57 while (count--) { 58 int hi = hex_to_bin(*src++); 59 int lo = hex_to_bin(*src++); 60 61 if ((hi < 0) || (lo < 0)) 62 return -1; 63 64 *dst++ = (hi << 4) | lo; 65 } 66 return 0; 67 } 68 69 /** 70 * bin2hex - convert binary data to an ascii hexadecimal string 71 * @dst: ascii hexadecimal result 72 * @src: binary data 73 * @count: binary data length 74 */ 75 static inline char *bin2hex(char *dst, const void *src, size_t count) 76 { 77 const unsigned char *_src = src; 78 79 while (count--) 80 dst = hex_byte_pack(dst, *_src++); 81 return dst; 82 } 83 84 int hex_dump_to_buffer(const void *buf, size_t len, int rowsize, int groupsize, 85 char *linebuf, size_t linebuflen, bool ascii); 86 void print_hex_dump(const char *prefix_str, int prefix_type, int rowsize, 87 int groupsize, const void *buf, size_t len, bool ascii); 88 void print_hex_dump_bytes(const char *prefix_str, int prefix_type, 89 const void *buf, size_t len); 90 91 #endif /* HEXDUMP_H */ 92
