FreeCalypso > hg > freecalypso-tools

annotate uptools/libcoding/hexdecode.c @ 1011:6d9b10633f10

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etmsync Pirelli IMEI retrieval: fix poor use of printf() Bug reported by Vadim Yanitskiy <fixeria@osmocom.org>: the construct where a static-allocated string was passed to printf() without any format arguments causes newer compilers to report a security problem. Given that formatted output is not needed here, just fixed string output, change printf() to fputs(), and direct the error message to stderr while at it.
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 23 May 2024 17:29:57 +0000
parents 18c692984549
children
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18c692984549 uptools/libcoding: hex line decoding implemented
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1 /*
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2 * This library module implements decoding of long hex strings,
18c692984549 uptools/libcoding: hex line decoding implemented
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3 * such as SMS PDUs.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <ctype.h>
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8
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9 decode_hex_line(inbuf, outbuf, outmax)
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10 char *inbuf;
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11 u_char *outbuf;
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12 unsigned outmax;
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13 {
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14 char *inp = inbuf;
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15 u_char *outp = outbuf;
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16 unsigned outcnt = 0;
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17 int c, d[2], i;
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18
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19 while (*inp) {
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20 if (!isxdigit(inp[0]) || !isxdigit(inp[1]))
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21 return(-1);
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22 if (outcnt >= outmax)
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23 break;
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24 for (i = 0; i < 2; i++) {
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25 c = *inp++;
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26 if (isdigit(c))
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27 d[i] = c - '0';
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28 else if (isupper(c))
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29 d[i] = c - 'A' + 10;
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30 else
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31 d[i] = c - 'a' + 10;
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32 }
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33 *outp++ = (d[0] << 4) | d[1];
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34 outcnt++;
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35 }
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36 return outcnt;
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37 }