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annotate target-utils/libload/hexstrings.c @ 88:ccde45a06737

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nuc-fw: beginning of the configuration mechanism
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 23 Aug 2013 02:02:59 +0000
parents 9b4c5ce3db8b
children
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9b4c5ce3db8b loadagent: ML command (support for fc-chainload) implemented
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1 /*
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2 * The decode_hex_digits() function contained in this module
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3 * will be used by the XRAM and flash loading commands
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4 * which take SREC-like long hex string arguments.
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5 */
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6
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7 #include <ctype.h>
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8 #include "types.h"
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9
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10 decode_hex_digits(str, ndigits, valp)
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11 char *str;
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12 int ndigits;
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13 u32 *valp;
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14 {
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15 u32 accum;
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16 int i, c;
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17
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18 accum = 0;
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19 for (i = 0; i < ndigits; i++) {
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20 c = *str++;
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21 if (!isxdigit(c))
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22 return(-1);
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23 accum <<= 4;
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24 if (isdigit(c))
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25 accum += c - '0';
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26 else if (islower(c))
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27 accum += c - 'a' + 10;
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28 else
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29 accum += c - 'A' + 10;
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30 }
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31 *valp = accum;
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32 return(0);
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33 }