27 lines
489 B
C
27 lines
489 B
C
#include <stdint.h>
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#include <stdio.h>
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uint32_t numeric_ip4(const char *ip) {
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uint32_t octets = 0;
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uint8_t octet = 0;
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for(; *ip; ip += 1) {
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if(*ip == '.') {
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octets = (octets << 8) | octet;
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octet = 0;
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} else {
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octet = (octet * 10) + (*ip - '0');
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}
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}
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return (octets << 8) | octet;
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}
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int main(int argc, char **argv) {
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for(argv += 1, argc -= 1; *argv; argv += 1, argc -= 1) {
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printf("%s: %u\n", *argv, numeric_ip4(*argv));
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}
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return 0;
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}
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