#include "global.h"


/*
 * rpc_srv_blobMap() Map blob to memory region 
 * @srv = RPC Server instance
 * @blob = Map to this BLOB element
 * return: -1 error or 0 ok
 */
inline int
rpc_srv_blobMap(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
{
	int f;
	struct stat sb;
	char szFName[MAXPATHLEN];

	if (!blob) {
		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
		return -1;
	}

	memset(szFName, 0, MAXPATHLEN);
	snprintf(szFName, MAXPATHLEN, BLOB_FILE, srv->srv_blob.dir, blob->blob_var);
	f = open(szFName, O_RDONLY);
	if (f == -1) {
		LOGERR;
		return -1;
	}
	if (fstat(f, &sb) == -1) {
		LOGERR;
		close(f);
		return -1;
	}

	blob->blob_data = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, f, 0);
	if (blob->blob_data == MAP_FAILED) {
		LOGERR;
		close(f);
		blob->blob_data = NULL;
		return -1;
	} else {
		blob->blob_len = sb.st_size;
		close(f);
	}

	return 0;
}

/*
 * rpc_srv_blobUnmap() Unmap blob memory region 
 * @blob = Mapped BLOB element
 * return: none
 */
inline void
rpc_srv_blobUnmap(rpc_blob_t * __restrict blob)
{
	if (!blob || !blob->blob_data)
		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
	else {
		munmap(blob->blob_data, blob->blob_len);
		blob->blob_data = NULL;
		blob->blob_len = 0;
	}
}

/*
 * rpc_srv_blobFree() Free blob from disk & memory
 * @srv = RPC Server instance
 * @blob = Mapped BLOB element
 * return: -1 error or 0 ok
 */
inline int
rpc_srv_blobFree(rpc_srv_t * __restrict srv, rpc_blob_t * __restrict blob)
{
	char szFName[MAXPATHLEN];

	if (!blob) {
		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
		return -1;
	}

	if (blob->blob_data)
		rpc_srv_blobUnmap(blob);

	memset(szFName, 0, MAXPATHLEN);
	snprintf(szFName, MAXPATHLEN, BLOB_FILE, srv->srv_blob.dir, blob->blob_var);
	if (remove(szFName) == -1) {
		LOGERR;
		return -1;
	}

	return 0;
}

// ------------------------------------------------------------

/*
 * rpc_srv_sendBLOB() Send mapped BLOB to client
 * @cli = Client instance
 * @blob = Mapped BLOB element
 * return: -1 error, 0 ok
 */
int
rpc_srv_sendBLOB(rpc_cli_t * __restrict cli, rpc_blob_t * __restrict blob)
{
	int ret, len;
	uint8_t *pos;

	if (!cli || !blob || !blob->blob_data) {
		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
		return -1;
	}

	for (ret = blob->blob_len, pos = blob->blob_data; ret > 0; ret -= len, pos += len)
		if ((len = send(cli->cli_sock, pos, ret > BLOBSIZ ? BLOBSIZ : ret, 0)) == -1) {
			LOGERR;
			return -1;
		}

	return ret;
}

/*
 * rpc_srv_recvBLOB() Receive BLOB from client
 * @cli = Client instance
 * return: -1 error, 0 ok
 */
int
rpc_srv_recvBLOB(rpc_cli_t * __restrict cli)
{
	int ret, len;
	uint8_t *pos;
	rpc_srv_t *s;

	if (!cli || !cli->cli_parent) {
		rpc_SetErr(EINVAL, "Error:: invalid arguments ...\n");
		return -1;
	} else
		s = cli->cli_parent;


	return ret;
}