PCBUF.C
上传用户:sunrenlu
上传日期:2022-06-13
资源大小:1419k
文件大小:2k
- #include <copyright.h>
- #include <wattcp.h>
- #include <mem.h>
- int sock_rbsize( sock_type *s )
- {
- switch( _chk_socket( s )) {
- #ifdef NOTUSED // S. Lawson - wrong if application supplied buffer
- case 1 : return( tcp_MaxBufSize );
- case 2 : return( tcp_MaxBufSize );
- #else
- case 1 : return( s->udp.maxrdatalen );
- case 2 : return( s->tcp.maxrdatalen );
- #endif
- /* case 0 : */
- default: return( 0 );
- }
- }
- int sock_rbused( sock_type *s )
- {
- switch( _chk_socket( s )) {
- case 1 : return( s->udp.rdatalen );
- case 2 : return( s->tcp.rdatalen );
- /* case 0 : */
- default: return( 0 );
- }
- }
- int sock_rbleft( sock_type *s )
- {
- switch( _chk_socket( s )) {
- #ifdef NOTUSED // S. Lawson - wrong if application supplied buffer
- case 1 : return( tcp_MaxBufSize - s->udp.rdatalen );
- case 2 : return( tcp_MaxBufSize - s->tcp.rdatalen );
- #else
- case 1 : return( s->udp.maxrdatalen - s->udp.rdatalen );
- case 2 : return( s->tcp.maxrdatalen - s->tcp.rdatalen );
- #endif
- /* case 0 : */
- default: return( 0 );
- }
- }
- int sock_tbsize( sock_type *s )
- {
- switch( _chk_socket( s )) {
- case 2 : return( tcp_MaxBufSize );
- default: return( 0 );
- }
- }
- int sock_tbused( sock_type *s )
- {
- switch( _chk_socket( s )) {
- case 2 : return( s->tcp.datalen );
- default: return( 0 );
- }
- }
- int sock_tbleft( sock_type *s )
- {
- switch( _chk_socket( s )) {
- case 2 : return( tcp_MaxBufSize - s->tcp.datalen );
- default: return( 0 );
- }
- }
- int sock_preread( sock_type *s, byte *dp, int len )
- {
- int count;
- if ( (count = s->udp.rdatalen) < 1) /* 0 : no data, -1 : error */
- return( count );
- if ( count > len ) count = len;
- movmem( s->udp.rdata, dp, count );
- return( count );
- }