FreeCalypso > hg > freecalypso-tools

annotate target-utils/libcommon/hexarg.c @ 926:6a0aa8d36d06

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rvinterf backslash escape: introduce libprint The new helper function library named libprint is meant to replace the badly misnamed libg23, and will soon contain functions for printing all of the same kinds of GPF TST packets that are now handled in libg23. However, we are also moving safe_print_trace() from libasync to this new library, and changing it to emit our new backslash escape format.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 03:47:46 +0000
parents e7502631a0f9
children
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1 /*
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2 * Many commands take hex arguments. This module contains the parse_hexarg()
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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
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7 #include <sys/types.h>
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8 #include <ctype.h>
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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 }