diff options
Diffstat (limited to 'src/algebra/net.spad.pamphlet')
| -rw-r--r-- | src/algebra/net.spad.pamphlet | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/algebra/net.spad.pamphlet b/src/algebra/net.spad.pamphlet index c44130e2..ba8bfdc7 100644 --- a/src/algebra/net.spad.pamphlet +++ b/src/algebra/net.spad.pamphlet @@ -130,6 +130,10 @@ InputBinaryFile(): Public == Private where ++ eof?(ifile) holds when the last read reached end of file. isOpen?: % -> Boolean ++ open?(ifile) holds if `ifile' is in open state. + position: % -> SingleInteger + ++ position(f) returns the current byte-position in the file `f'. + position!: (%,SingleInteger) -> SingleInteger + ++ position(f,p) sets the current byte-position to `i'. Private == add Rep == Record(stream: SExpression, filename: FileName, eof: Boolean) inputBinaryFile(f: FileName) == @@ -153,6 +157,15 @@ InputBinaryFile(): Public == Private where rep(ifile).stream := closeFile(rep(ifile).stream)$Lisp rep(ifile).eof := true ifile + position ifile == + isOpen? ifile => + FILE_-POSITION(rep(ifile).stream)$Lisp + error "file is not open" + position!(ifile,p) == + isOpen? ifile => + FILE_-POSITION(rep(ifile).stream,p)$Lisp + p + error "file is not open" coerce(ifile: %): OutputForm == rep(ifile).filename::OutputForm @ @@ -197,6 +210,35 @@ OutputBinaryFile(): Public == Private where rep(ifile).filename::OutputForm @ +\subsection{The InputOutputBinaryFile domain} + +<<domain IOBFILE InputOutputBinaryFile>>= +)abbrev domain IOBFILE InputOutputBinaryFile +++ Author: Gabriel Dos Reis +++ Date Created: October 21, 2008 +++ Date Last Modified: October 21, 2008 +++ Description: +++ This domain provides representation for binary files open +++ for input and output operations. +++ See Also: InputBinaryFile, OutputBinaryFile +InputOutputBinaryFile(): Public == Private where + Public == Join(InputOutputByteConduit, CoercibleTo OutputForm) with + inputOutputBinaryFile: FileName -> % + ++ inputOutputBinaryFile(f) returns an input/output conduit obtained + ++ by opening the file designated by `f' as a binary file. + inputOutputBinaryFile: String -> % + ++ inputOutputBinaryFile(f) returns an input/output conduit obtained + ++ by opening the file named by `f' as a binary file. + isOpen?: % -> Boolean + ++ isOpen?(f) holds if `f' is in open state. + Private == (InputBinaryFile, OutputBinaryFile) add + Rep == Record(stream: SExpression, filename: FileName) + inputOutputBinaryFile(f: FileName) == + per [openBinaryFile(f::String,bothWays$IOMode)$Lisp,f] + inputOutputBinaryFile(f: String) == + per [openBinaryFile(f,bothWays$IOMode)$Lisp,f::FileName] +@ + \section{The Hostname domain} @@ -289,6 +331,7 @@ PortNumber(): Public == Private where <<domain INBFILE InputBinaryFile>> <<domain OUTBFILE OutputBinaryFile>> +<<domain IOBFILE InputOutputBinaryFile>> <<domain HOSTNAME Hostname>> <<domain PORTNUM PortNumber>> |