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//==========================================================================
//
// hex-utils.c
//
// Utilities for dealing with hexadecimal strings.
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos is distributed in the hope that it will be useful, but WITHOUT
// ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
// FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
// for more details.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):
// Contributors: gthomas
// Date: 1999-10-20
// Purpose:
// Description:
//
//
//####DESCRIPTIONEND####
//
//=========================================================================
#include <bsp/hex-utils.h>
int
__hex(char ch)
{
if ((ch >= 'a') && (ch <= 'f')) return (ch-'a'+10);
if ((ch >= '0') && (ch <= '9')) return (ch-'0');
if ((ch >= 'A') && (ch <= 'F')) return (ch-'A'+10);
return (-1);
}
/*
* Convert the hex data in 'buf' into 'count' bytes to be placed in 'mem'.
* Returns a pointer to the character in mem AFTER the last byte written.
*/
char *
__unpack_bytes_to_mem(char *buf, char *mem, int count)
{
int i;
char ch;
for (i = 0; i < count; i++) {
ch = __hex(*buf++) << 4;
ch = ch + __hex(*buf++);
*mem++ = ch;
}
return(mem);
}
/*
* While finding valid hex chars, build an unsigned long int.
* Return number of hex chars processed.
*/
int
__unpack_ulong(char **ptr, unsigned long *val)
{
int numChars = 0;
int hexValue;
*val = 0;
while (**ptr) {
hexValue = __hex(**ptr);
if (hexValue >= 0) {
*val = (*val << 4) | hexValue;
numChars ++;
} else
break;
(*ptr)++;
}
return (numChars);
}
/*
* Unpack 'count' hex characters, forming them into a binary value.
* Return that value as an int. Adjust the source pointer accordingly.
*/
int
__unpack_nibbles(char **ptr, int count)
{
int value = 0;
while (--count >= 0) {
value = (value << 4) | __hex(**ptr);
(*ptr)++;
}
return value;
}
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