FreeCalypso > hg > freecalypso-sw

annotate target-utils/libcommon/hexarg.c @ 992:a7b0b426f9ca

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target-utils: boot ROM UART autodetection revamped The new implementation should work with both the familiar Calypso C035 boot ROM version found in our regular targets as well as the older Calypso F741979B version found on the vintage D-Sample board.
author Mychaela Falconia <falcon@ivan.Harhan.ORG>
date Wed, 30 Dec 2015 21:28:41 +0000
parents f4fc449a64ea
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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1 /*
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2 * Many commands take hex arguments. This module contains the parse_hexarg()
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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3 * function, which is a wrapper around strtoul that performs some additional
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4 * checks.
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5 */
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6
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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7 #include <sys/types.h>
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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8 #include <ctype.h>
f4fc449a64ea target-utils libcommon infrastructure for interactive commands
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9 #include <stdlib.h>
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11 parse_hexarg(arg, maxdigits, valp)
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12 char *arg;
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13 int maxdigits;
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14 u_long *valp;
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15 {
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16 char *cp = arg, *bp;
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17 int len;
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18
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19 if (cp[0] == '0' && (cp[1] == 'x' || cp[1] == 'X'))
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20 cp += 2;
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21 for (bp = cp; *cp; cp++)
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22 if (!isxdigit(*cp))
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23 return(-1);
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24 len = cp - bp;
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25 if (len < 1 || len > maxdigits)
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26 return(-1);
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27 *valp = strtoul(arg, 0, 16);
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28 return(0);
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29 }