Function setenv

deps/quickjs/quickjs-libc.c:988–1001

#if defined(_WIN32)
static void setenv(const char *name, const char *value, int overwrite)
{
    char *str;
    size_t name_len, value_len;
    name_len = strlen(name);
    value_len = strlen(value);
    str = malloc(name_len + 1 + value_len + 1);
    memcpy(str, name, name_len);
    str[name_len] = '=';
    memcpy(str + name_len + 1, value, value_len);
    str[name_len + 1 + value_len] = '\0';
    _putenv(str);
    free(str);
}

static void unsetenv(const char *name)
{