//-----------------------------------------------------------------------------
// read the map
//-----------------------------------------------------------------------------
int ddmap_read(struct ddmap_data *map_data, int dump_header)
{
int ret = 0;
int fd;
struct ddmap_header *hdr = NULL;
int header_bytes = sizeof(struct ddmap_header);
int read_bytes;
if ((fd = dd_dev_open_ro(map_data->map_device, 0)) == -1 )
{
dd_log(LOG_ERR, "unable to open map: %s",map_data->map_device);
return -1;
}
dd_log(LOG_INFO, "opened map: %s",map_data->map_device);
dd_log(LOG_INFO, "header size: %d", header_bytes);
if ( (hdr = malloc(header_bytes)) == NULL )
{
dd_log(LOG_ERR,"unable to allocate memory for ddmap_header");
return -1;
}
if ( (read_bytes = read(fd, hdr, header_bytes)) == -1 )
{
dd_log(LOG_ERR, "unable to read header from map");
ret = -1;
goto err;
}
if ( read_bytes != header_bytes )
{
dd_log(LOG_ERR, "unable to read %d header bytes, got %d bytes",
header_bytes, read_bytes);
ret = -1;
goto err;
}
map_data->name_sum = hdr->name_sum;
map_data->map_size = hdr->map_size;
map_data->map_size_bytes = hdr->map_size * DDMAP_U32_SIZE;
if ( dump_header )
{
printf("ddmap.device: %s\n", map_data->map_device);
printf("ddmap.info: %s\n", hdr->info);
printf("ddmap.version: %d\n", hdr->version);
printf("ddmap.suspended: %d\n", hdr->suspended);
printf("ddmap.name_sum: 0x%08x\n", hdr->name_sum);
printf("ddmap.map_size: %u (u32)\n", hdr->map_size);
printf("ddmap.map_size_bytes: %llu\n", (long long unsigned)map_data->map_size_bytes);
}
if ( (map_data->map = malloc(map_data->map_size_bytes)) == NULL )
{
dd_log(LOG_ERR, "unable to allocate memory for map");
ret = -1;
goto err;
}
if ( (read_bytes = read(fd, map_data->map, map_data->map_size_bytes)) == -1 )
{
dd_log(LOG_ERR, "unable to read map");
ret = -1;
goto err;
}
if ( read_bytes != map_data->map_size_bytes )
{
dd_log(LOG_ERR, "unable to read %d map bytes, got %d bytes (map data is broken!)",
map_data->map_size_bytes, read_bytes);
ret = -1;
goto err;
}
err:
if (hdr)
free(hdr);
return ret;
}
double2
dd_log10(const double2 a)
{
return dd_div(dd_log(a), DD_C_LOG10);
}
double2
dd_log_d(double a)
{
return dd_log(dd_create(a, 0));
}
double2
dd_pow(const double2 a, const double2 b)
{
return dd_exp(dd_mul(b, dd_log(a)));
}