source: EcnlProtoTool/trunk/prototool/src/musl/inet_aton.c@ 279

#include <ctype.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
//#include "libc.h"

int __inet_aton(const char *s0, struct in_addr *dest)
{
        const char *s = s0;
        unsigned char *d = (void *)dest;
        unsigned long a[4] = { 0 };
        char *z;
        int i;

        for (i=0; i<4; i++) {
                a[i] = strtoul(s, &z, 0);
                if (z==s || (*z && *z != '.') || !isdigit(*s))
                        return 0;
                if (!*z) break;
                s=z+1;
        }
        if (i==4) return 0;
        switch (i) {
        case 0:
                a[1] = a[0] & 0xffffff;
                a[0] >>= 24;
        case 1:
                a[2] = a[1] & 0xffff;
                a[1] >>= 16;
        case 2:
                a[3] = a[2] & 0xff;
                a[2] >>= 8;
        }
        for (i=0; i<4; i++) {
                if (a[i] > 255) return 0;
                d[i] = a[i];
        }
        return 1;
}

//weak_alias(__inet_aton, inet_aton);