| 1 | /*␊ |
| 2 | * This file is part of the libpayload project.␊ |
| 3 | *␊ |
| 4 | * Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>␊ |
| 5 | *␊ |
| 6 | * Redistribution and use in source and binary forms, with or without␊ |
| 7 | * modification, are permitted provided that the following conditions␊ |
| 8 | * are met:␊ |
| 9 | * 1. Redistributions of source code must retain the above copyright␊ |
| 10 | * notice, this list of conditions and the following disclaimer.␊ |
| 11 | * 2. Redistributions in binary form must reproduce the above copyright␊ |
| 12 | * notice, this list of conditions and the following disclaimer in the␊ |
| 13 | * documentation and/or other materials provided with the distribution.␊ |
| 14 | * 3. The name of the author may not be used to endorse or promote products␊ |
| 15 | * derived from this software without specific prior written permission.␊ |
| 16 | *␊ |
| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND␊ |
| 18 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE␊ |
| 19 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE␊ |
| 20 | * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE␊ |
| 21 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL␊ |
| 22 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS␊ |
| 23 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)␊ |
| 24 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT␊ |
| 25 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY␊ |
| 26 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF␊ |
| 27 | * SUCH DAMAGE.␊ |
| 28 | */␊ |
| 29 | ␊ |
| 30 | #include "libsaio.h"␊ |
| 31 | ␊ |
| 32 | /*␊ |
| 33 | * Convert a number in BCD format to decimal.␊ |
| 34 | *␊ |
| 35 | * @param b The BCD number.␊ |
| 36 | * @return The given BCD number in decimal format.␊ |
| 37 | */␊ |
| 38 | int bcd2dec(int b)␊ |
| 39 | {␊ |
| 40 | ␉return ((b >> 4) & 0x0f) * 10 + (b & 0x0f);␊ |
| 41 | }␊ |
| 42 | ␊ |
| 43 | /*␊ |
| 44 | * Convert a number in decimal format into the BCD format.␊ |
| 45 | *␊ |
| 46 | * @param d The decimal number.␊ |
| 47 | * @return The given decimal number in BCD format.␊ |
| 48 | */␊ |
| 49 | int dec2bcd(int d)␊ |
| 50 | {␊ |
| 51 | ␉return ((d / 10) << 4) | (d % 10);␊ |
| 52 | }␊ |
| 53 | #if UNUSED␊ |
| 54 | /**␊ |
| 55 | * Return the absolute value of the specified integer.␊ |
| 56 | *␊ |
| 57 | * @param j The integer of which we want to know the absolute value.␊ |
| 58 | * @return The absolute value of the specified integer.␊ |
| 59 | */␊ |
| 60 | int abs(int j)␊ |
| 61 | {␊ |
| 62 | ␉return (j >= 0 ? j : -j);␊ |
| 63 | }␊ |
| 64 | ␊ |
| 65 | long int labs(long int j)␊ |
| 66 | {␊ |
| 67 | ␉return (j >= 0 ? j : -j);␊ |
| 68 | }␊ |
| 69 | ␊ |
| 70 | long long int llabs(long long int j)␊ |
| 71 | {␊ |
| 72 | ␉return (j >= 0 ? j : -j);␊ |
| 73 | }␊ |
| 74 | ␊ |
| 75 | /**␊ |
| 76 | * Given a 4-bit value, return the ASCII hex representation of it.␊ |
| 77 | *␊ |
| 78 | * @param b A 4-bit value which shall be converted to ASCII hex.␊ |
| 79 | * @return The ASCII hex representation of the specified 4-bit value.␊ |
| 80 | * Returned hex-characters will always be lower-case (a-f, not A-F).␊ |
| 81 | */␊ |
| 82 | u8 bin2hex(u8 b)␊ |
| 83 | {␊ |
| 84 | ␉return (b < 10) ? '0' + b : 'a' + (b - 10);␊ |
| 85 | }␊ |
| 86 | ␊ |
| 87 | /**␊ |
| 88 | * Given an ASCII hex input character, return its integer value.␊ |
| 89 | *␊ |
| 90 | * For example, the input value '6' will be converted to 6, 'a'/'A' will␊ |
| 91 | * be converted to 10, 'f'/'F' will be converted to 15, and so on.␊ |
| 92 | *␊ |
| 93 | * The return value for invalid input characters is 0.␊ |
| 94 | *␊ |
| 95 | * @param h The input byte in ASCII hex format.␊ |
| 96 | * @return The integer value of the specified ASCII hex byte.␊ |
| 97 | */␊ |
| 98 | u8 hex2bin(u8 h)␊ |
| 99 | {␊ |
| 100 | ␉return (('0' <= h && h <= '9') ? (h - '0') : \␊ |
| 101 | ␉ ('A' <= h && h <= 'F') ? (h - 'A' + 10) : \␊ |
| 102 | ␉ ('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0);␊ |
| 103 | }␊ |
| 104 | #endif␊ |
| 105 | |
