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Improve x509_inet_pton_ipv4 readability
Introduce descriptive variable names. Drop the table of tens. Signed-off-by: Andrzej Kurek <andrzej.kurek@arm.com>
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@ -2623,24 +2623,23 @@ static int x509_inet_pton_ipv6(const char *src, void *dst)
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static int x509_inet_pton_ipv4(const char *src, void *dst)
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{
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/* note: allows leading 0's, e.g. 000.000.000.000 */
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const unsigned char *v = (const unsigned char *) src;
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const unsigned char *character = (const unsigned char *) src;
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uint8_t *res = (uint8_t *) dst;
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uint8_t d1, d2, d3, i = 0;
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int ii;
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const uint8_t tens[] = { 0, 10, 20, 30, 40, 50, 60, 70, 80, 90 };
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uint8_t digit1, digit2, digit3, num_octets = 0;
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uint16_t octet;
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do {
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if ((d1 = *(uint8_t *) v - '0') > 9) {
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if ((digit1 = *(uint8_t *) character - '0') > 9) {
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break;
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} else if ((d2 = *(uint8_t *) ++v - '0') > 9) {
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*res++ = d1;
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} else if ((d3 = *(uint8_t *) ++v - '0') > 9) {
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*res++ = tens[d1] + d2;
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} else if ((ii = (d1 < 2 ? d1 == 1 ? 100 : 0 : d1 == 2 ? 200 : 999)
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+ tens[d2] + d3) < 256) {
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*res++ = (uint8_t) ii, ++v;
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} else if ((digit2 = *(uint8_t *) ++character - '0') > 9) {
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*res++ = digit1;
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} else if ((digit3 = *(uint8_t *) ++character - '0') > 9) {
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*res++ = digit1 * 10 + digit2;
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} else if ((octet = digit1 * 100 + digit2 * 10 + digit3) < 256) {
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*res++ = (uint8_t) octet, ++character;
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}
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} while (++i < 4 && *v++ == '.');
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return i == 4 && *v == '\0' ? 0 : -1;
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} while (++num_octets < 4 && *character++ == '.');
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return num_octets == 4 && *character == '\0' ? 0 : -1;
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}
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#else
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