source: azure_iot_hub_riscv/trunk/app_iothub_client/src/stub.c@ 453

#include <stdint.h>
#include <stdlib.h>
#include <ctype.h>
#include <errno.h>
#include <sys/time.h>
#include <kernel.h>
#include <t_syslog.h>
#include <t_stdlib.h>
#include "main.h"
#include "kernel_cfg.h"
#include "esp_at_socket.h"

void __wrap_exit(int status)
{
        ext_ker();
}

int _kill(int pid, int sig)
{
        return 0;
}

int _getpid(int n)
{
        return 1;
}

int custom_rand_generate_seed(uint8_t *output, uint32_t sz)
{
        SYSTIM now;
        int32_t i;

        get_tim(&now);
        srand(now);

        for (i = 0; i < sz; i++)
                output[i] = rand();

        return 0;
}

// musl-libc

int inet_aton(const char *s0, struct in_addr *dest)
{
        const char *s = s0;
        unsigned char *d = (unsigned char *)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;
}

struct ether_addr *ether_aton_r(const char *x, struct ether_addr *p_a)
{
        struct ether_addr a;
        char *y;
        for (int ii = 0; ii < 6; ii++) {
                unsigned long int n;
                if (ii != 0) {
                        if (x[0] != ':') return 0; /* bad format */
                        else x++;
                }
                n = strtoul(x, &y, 16);
                x = y;
                if (n > 0xFF) return 0; /* bad byte */
                a.ether_addr_octet[ii] = n;
        }
        if (x[0] != 0) return 0; /* bad format */
        *p_a = a;
        return p_a;
}