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hexutl.c
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211 lines (184 loc) · 6.06 KB
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#if 0
/*===========================================================================
H E X U T L . C
Copyright 1989 Atari Games. All rights reserved.
Author: Lyle Rains
---------------------------------------------------------------------------
Revision history:
---------------------------------------------------------------------------
Known bugs/features/limitations:
===========================================================================*/
#endif
#include "mixit.h"
/*
* The following is for ASCII only.
*/
uint8_t chartohex[] = {
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, XX, XX, XX, XX, XX, XX,
XX, 10, 11, 12, 13, 14, 15, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, 10, 11, 12, 13, 14, 15, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX,
XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX, XX
};
uint8_t hex_of[] = { '0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
/*==========================================================================
* Convert ASCII hex string to binary bytes.
* Make sure all the chars are hexidecimal.
*==========================================================================*/
#define ERRMSG_SIZE (256)
int strtobytes(uint8_t *inpStr, int nbytes)
{
uint8_t *bytestr = inpStr, *str=inpStr;
int i;
char errMsg[ERRMSG_SIZE];
int errCnt = 0;
for ( i = 0; i < nbytes; ++i )
{
char msb,lsb;
msb = chartohex[str[0]];
lsb = chartohex[str[1]];
if ( msb == XX || lsb == XX )
{
int ii;
errCnt = snprintf(errMsg, ERRMSG_SIZE, "strtobytes(): Not hex digit at str[%d] of len %d '", i, nbytes*2);
for ( ii = 0; ii < i && errCnt < ERRMSG_SIZE - 18-4-4; ++ii )
{
errMsg[errCnt++] = hex_of[(inpStr[ii]>>4)&0xF];
errMsg[errCnt++] = hex_of[inpStr[ii]&0xF];
}
if ( ii >= ERRMSG_SIZE-18-4-4 )
errCnt += snprintf(errMsg+errCnt,ERRMSG_SIZE-errCnt,"...'");
errCnt += snprintf(errMsg + errCnt, ERRMSG_SIZE - errCnt, "' 0x%02X(%c) 0x%02X(%c)",
str[0], isprint(str[0])?str[0]:'.',
str[1], isprint(str[1])?str[1]:'.'
);
++i;
if ( errCnt < ERRMSG_SIZE - 4 && nbytes-i > 1)
{
str += 2;
errMsg[errCnt++] = ' ';
errMsg[errCnt++] = '\'';
for (ii=i*2; ii < nbytes*2 && errCnt < ERRMSG_SIZE-2; ii += 2, str += 2)
{
errMsg[errCnt++] = isprint(str[0]) ? str[0]:'.';
errMsg[errCnt++] = isprint(str[1]) ? str[1]:'.';
}
errMsg[errCnt++] = '\'';
errMsg[errCnt] = 0;
}
moan(errMsg);
return 1;
}
*bytestr++ = (msb<<4)|lsb;
str += 2;
}
return (0);
} /* end strtobytes */
/*=========================================================================
* Convert ASCII hex string to binary hex nybbles (only 4 bits worth per byte).
* Make sure all the chars are hexidecimal.
*========================================================================*/
int strtohex(uint8_t *inpStr, int nchars)
{
uint8_t *str=inpStr;
int i;
char errMsg[ERRMSG_SIZE];
int errCnt = 0;
for ( i = 0; i < nchars; ++i )
{
char bits;
bits = chartohex[str[i]];
if ( bits == XX )
{
int ii;
errCnt = snprintf(errMsg, ERRMSG_SIZE, "strtohex(): Not hex digit at str[%d] of len %d '", i, nchars);
for ( ii = 0; ii < i && errCnt < ERRMSG_SIZE - 18-4-4; ++ii )
{
errMsg[errCnt++] = hex_of[inpStr[ii]&0xF];
}
if ( ii >= ERRMSG_SIZE-18-4-4 )
errCnt += snprintf(errMsg+errCnt,ERRMSG_SIZE-errCnt,"...'");
errCnt += snprintf(errMsg + errCnt, ERRMSG_SIZE - errCnt, "' 0x%02X(%c)",
str[i], isprint(str[i])?str[i]:'.');
++i;
if ( errCnt < ERRMSG_SIZE - 4 )
{
errMsg[errCnt++] = ' ';
errMsg[errCnt++] = '\'';
for (ii=i; ii < nchars && errCnt < ERRMSG_SIZE-2; ++ii)
{
errMsg[errCnt++] = isprint(str[ii]) ? str[ii]:'.';
}
errMsg[errCnt++] = '\'';
errMsg[errCnt] = 0;
}
moan(errMsg);
return 1;
}
str[i] = bits;
}
return (0);
} /* end strtohex */
/*==========================================================================
* Convert binary hex nybble string to bytes.
*==========================================================================*/
void hextobytes(uint8_t *hexstr, int nbytes)
{
uint8_t *bytestr = hexstr;
int i;
for (i = 0; i < nbytes; ++i)
{
*bytestr++ = HEXTOBYTE(hexstr);
hexstr += 2;
}
} /* end hextobytes */
/*==========================================================================
* Assemble big-endian byte stream into multi-byte logical addr.
*==========================================================================*/
LogicalAddr bytestoaddr(uint8_t *bytestr, int nbytes)
{
LogicalAddr val = 0L;
int i;
if (nbytes > 0)
{
if (nbytes > 4)
{
bytestr += nbytes - 4;
nbytes = 4;
}
for (i = 0; i < nbytes; ++i)
val = (val << 8) + bytestr[i];
}
return (val);
} /* end bytestoaddr */
/*==========================================================================
* Assemble big-endian hex nybble stream into multi-byte logical addr.
*==========================================================================*/
LogicalAddr hextoaddr(uint8_t *hexstr, int nnybs)
{
LogicalAddr val = 0L;
int i;
if (nnybs > 0)
{
if (nnybs > 8)
{
hexstr += nnybs - 8;
nnybs = 8;
}
for (i = 0; i < nnybs; ++i)
val = (val * 16) + hexstr[i];
}
return (val);
} /* end hextoaddr */