dd3e690220
Change-Id: I419fcb16e0b10dee9195072e0e6befa6c9e61a69 Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com> Reviewed-on: http://review.coreboot.org/105 Tested-by: build bot (Jenkins) Reviewed-by: Frank Vibrans III <frank.vibrans@amd.com> Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Uwe Hermann <uwe@hermann-uwe.de>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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/*
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* Convert a number in BCD format to decimal.
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*
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* @param b The BCD number.
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* @return The given BCD number in decimal format.
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*/
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int bcd2dec(int b)
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{
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return ((b >> 4) & 0x0f) * 10 + (b & 0x0f);
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}
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/*
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* Convert a number in decimal format into the BCD format.
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*
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* @param d The decimal number.
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* @return The given decimal number in BCD format.
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*/
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int dec2bcd(int d)
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{
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return ((d / 10) << 4) | (d % 10);
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}
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/**
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* Return the absolute value of the specified integer.
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*
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* @param j The integer of which we want to know the absolute value.
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* @return The absolute value of the specified integer.
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*/
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int abs(int j)
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{
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return (j >= 0 ? j : -j);
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}
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long int labs(long int j)
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{
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return (j >= 0 ? j : -j);
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}
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long long int llabs(long long int j)
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{
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return (j >= 0 ? j : -j);
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}
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/**
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* Given a 4-bit value, return the ASCII hex representation of it.
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*
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* @param b A 4-bit value which shall be converted to ASCII hex.
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* @return The ASCII hex representation of the specified 4-bit value.
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* Returned hex-characters will always be lower-case (a-f, not A-F).
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*/
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u8 bin2hex(u8 b)
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{
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return (b < 10) ? '0' + b : 'a' + (b - 10);
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}
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/**
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* Given an ASCII hex input character, return its integer value.
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*
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* For example, the input value '6' will be converted to 6, 'a'/'A' will
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* be converted to 10, 'f'/'F' will be converted to 15, and so on.
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*
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* The return value for invalid input characters is 0.
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*
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* @param h The input byte in ASCII hex format.
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* @return The integer value of the specified ASCII hex byte.
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*/
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u8 hex2bin(u8 h)
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{
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return (('0' <= h && h <= '9') ? (h - '0') : \
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('A' <= h && h <= 'F') ? (h - 'A' + 10) : \
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('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0);
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}
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/**
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* Enters HALT state, after printing msg
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*
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* @param msg message to print
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*/
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void fatal(const char *msg)
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{
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fprintf(stderr, "%s",msg);
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halt();
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}
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void exit(int status)
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{
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printf("exited with status %d\n", status);
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halt();
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}
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int errno;
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char *getenv(const char *name)
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{
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return NULL;
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}
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