-\section{Functional Specification}
+\section{General Requirements}
+
+\subsection{Must Criteria}
+\begin{itemize}
+\item The program shall run on any computer running GNU/Linux.
+\item It has no graphical user interface but a help option and command line error reporting.
+\item The program shall support and check all block types according to \cite{ser16:progref:bformats}.
+\item The program must be able to list a tape image's contents.
+\item The program shall be capable of splitting tape images into single object files.
+\item The program's structure must be modular and easily extendable.
+\end{itemize}
+
+\subsection{Optional features}
+\begin{itemize}
+\item Possibility to split a tape image into single data block files.
+\item Software handshake paper tape reader control:\\
+A paper tape reader connected to the computer's serial port could be motion-controlled
+by use of XON and XOFF characters. This is useful when error breaks for tape inspection are
+enabled and the paper tape device does not support RTS/CTS hardware handshake.
+\item Full POSIX.1, 2004 edition, compliance.\\
+ This enables the program to be usable under many different UNIX style operating
+ systems.
+\end{itemize}
+
+\subsection{Further additions explicitely beyond the scope of this project}
+\begin{itemize}
+\item Detailed data block analysis:
+ \begin{itemize}
+ \item Linking objects into a virtual memory representation.
+ \item Generating disassembly listings of block contents
+ \end{itemize}
+
+\item Support for self loading system tapes generated by \emph{PAL-AP} (see \cite{ser16:opmanual}).
+
+\end{itemize}
+
+%*******************************************************************************
+\newpage
+\section{Detailed Functional Specification}
%*******************************************************************************
\subsection{Data input processing}
an end of tape mark is an appropriate end block.
}
-\rd{chk005}{Interactive checksum error handling}{
- The program shall be configurable to pause block processing on
- detection of a checksum error (\req{chk002}) and resume processing after
- user intervention.\\
- This feature is incompatible with data input from standard input.
-}
%*******************************************************************************
\subsection{Additional features}
of all blocks contained in the input data.\\
The output line format shall be unified for all block types.
}
+\vspace{0.5em}
+\par
+Here is an example output for the object \verb|O$PB|: \begin{verbatim}
+O$PB (0-0) Subprogram Name
+O$PS (0-0) " "
+O$PLDR (0-0) " "
+ (0-24) Switch to relocatable mode
+ (0-4) Data
+ (0-4) Data
+O$PB (0-50) Subprogram Entry Point Definition
+ (0-4) Data
+ (0-4) Data
+ (0-4) Data
+O$PLDR (0-50) Subprogram Entry Point Definition
+ (0-4) Data
+ (0-4) Data
+ (0-14) End
+\end{verbatim}
\rd{da002}{List exported symbols}{
Output a list of all exported symbols.
a zero-padded three digit number and EOT blocks are not suppressed.
}
+\rd{dp003}{Split into numbered blocks}{
+ The whole tape is split into one named and numbered file for each block.
+}
+
+
+%*******************************************************************************
+\newpage
+\subsection{Error handling}
+
+
+\newcommand{\esup}{
+ This error shall lead to an error message and immediate program
+ termination or a warning message and program continuation.
+}
+
+\newcommand{\enosup}{
+ This error shall always lead to an error message and immediate
+ program termination.
+}
+
+\rd{err001}{Error types}{
+ The program shall react to several error conditions. Some error
+ conditions can be turned into warnings by program configuration,
+ see \req{cfg003} and \req{cfg004} for details.\\
+ The following distinguished error types shall exist:
+ \begin{itemize}
+ \item Input/output error:\\
+ Error occuring during read from the input file descriptor
+ or during write to an output file.\\
+ No recovery from this error is possible.
+ \enosup
+ \item Block integrity error:\\
+ Caused by failed check according to \req{chk001}.\\
+ \esup
+ \item Checksum error:\\
+ Caused by failed check according to \req{chk002}.\\
+ \esup
+ \item Unknown block type error:\\
+ Caused by failed check according to \req{chk003}.\\
+ \esup
+ \item Object integrity error:\\
+ Caused by failed check according to \req{chk004}.\\
+ \esup
+ \item Usage error:\\
+ Error caused by errors in the program configuration i.e. wrong
+ parameters or impossible combinations of parameters.\\
+ \enosup \\
+ Additionally, the help (\req{h001}) message is output.
+ \item Internal program error:\\
+ Error caused by internal program problems.\\
+ This error should never occur.\\
+ \enosup
+ \end{itemize}
+}
+
+\rd{err002}{Program exit codes}{
+ The application shall return several different exir codes to the
+ execution environment (i.e. the shell). On occurrence of any error,
+ the program shall terminate with the appropriate exit code.\\
+ Program runs with warnings shall return a special exit code.
+ \begin{table}[H]
+ \begin{center}
+ \begin{tabular}{|r|c|}
+ \hline
+ \multicolumn{1}{|c|}{\bf Exit condition} & \bf Return code\\
+ \hline
+ Successfull program completion & 0 \\
+ File open error & 1\\
+ Input/output error & 2\\
+ Block integrity error & 3\\
+ Checksum error & 4\\
+ Unknown block type error & 5\\
+ Object integrity error & 6\\
+ Usage error & 7\\
+ Success with warnings & 99 \\
+ Internal program error & 100 \\
+ \hline
+ \end{tabular}
+ \caption[Program Exit codes]{Exit codes}
+ \end{center}
+ \end{table}
+}
+
+\rd{err003}{Error and warning messages}{
+ Every warning or error case shall cause an appropriate error respective
+ warning message.\\
+ Error messages shall consinst of ''Error:'' and the error reason.\\
+ Warning messages shall consist of ''Warning:'' and a descriptive
+ text.\\
+ The following texts shall be used to form error and warning messages:
+ \begin{table}[H]
+ \begin{center}
+ \begin{tabular}{|l|l|}
+ \hline
+ \bf Error condition & \bf Descriptive text\\ \hline
+ File open error & Could not open $<$filename$>$ for reading/writing!\\
+ Input error & Could not read from $<$filename$>$!\\
+ Output error & Could not write to $<$filename$>$!\\
+ Block integrity error & Block integrity check failed!\\
+ Checksum error & Block checksum wrong!\\
+ Unknown block type & Unknown block type!\\
+ Object integrity & Object integrity check failed!\\
+ Usage error & $<$Specific message describing the problem$>$\\
+ \hline
+ \end{tabular}
+ \end{center}
+ \caption[Error and warning messages]{Messages}
+ \end{table}
+}
+
+\rd{err004}{Error message output}{
+ Any error messages shall be output to standard error.\\
+ There shall be no way to suppress error messages.
+}
+
+\rd{err005}{Warning message output}{
+ Any warning messages shall be output to standard error.\\
+ There shall be a possibility to suppress warning messages.
+}
+
+\rd{err006}{Informational messages}{
+ Any informational messages go to standard error.
+}
+
+
%*******************************************************************************
\newpage
\subsection{Program configuration}
configuration file.
\item Configuration parameters passed via the command line:\\
Parameters passed on the command line will override
- values from previously read configuration files.
+ values from previously read configuration files. If the command line
+ mentiones a configuration file to read, this file is processed before
+ the other parameters supplied on the command line.
\end{enumerate}
}
(\req{dp001}).\\
split\_objects\_numbered & S & Split into numbered object files
(\req{dp002}).\\
+ split\_blocks & B & Split tape into named and numbered block
+ files (\req{dp003}).\\
ignore\_block\_errors & b & Ignore block integrity errors
(\req{err001},\req{chk001}).\\
ignore\_checksum\_errors & k & Ignore Checksum errors
(\req{err001}\req{chk002}).\\
- pause\_on\_checksum\_error & p & Wait for user input on checksum error
- (\req{chk005}).\\
+% pause\_on\_checksum\_error & p & Wait for user input on checksum error
+% (\req{chk005}).\\
ignore\_unknown\_block\_errors & n & Ignore errors causes by
datablocks of unknown type
(\req{err001}\req{chk003}).\\
ignore\_object\_integrity\_errors & g & Ignore errors caused by objects
without proper end block
(\req{err001}\req{chk004}).\\
+ quiet & q & Suppress all non-critical messages
+ (warnings, informational text)\\
\hline
\end{tabular}\end{center}
\caption{Configuration switches}
\rd{cfg005}{Configuration file syntax}{
The configuration file must comply two the following grammar, given in EBNF:
}
+
+% | "pause_on_checksum_error"
+
\begin{verbatim}
ConfigurationFile = { ConfigurationLine "<EOL>" } ;
ConfigurationLine = SwitchLine | StringLine | CommentLine ;
CommentLine = WSpace [ "#" String ] ;
WSpace = { " " } ;
SwLong = "output_info" | "ouput_called" | "output_exported"
- | "output_unsatisfied" | "split_objects" [ _"numbered" ]
+ | "output_unsatisfied" | "split_objects" [ "_numbered" ]
+ | "split_blocks"
| "ignore_block_errors" | "ignore_checksum_errors
- | "pause_on_checksum_error"
| "ignore_unknown_block_errors"
- | "ignore_object_integrity" ;
+ | "ignore_object_integrity"
+ | "quiet" ;
StrLong = "out_file" | "in_file" ;
BoolValue = TrueStr | FalseStr ;
String = { ? Every character except newline ?} ;
TrueStr = "yes" | "1" | "true" ;
- FalseStr = | "no" | "0" | "false" ;
+ FalseStr = "no" | "0" | "false" ;
\end{verbatim}
\rd{cfg006}{Command Line syntax}{
LongSwitch = "--" SwLong [ "=" BoolValue ] ;
ShortParam = "-" StrShort String ;
LongParam = "--" StrLong "=" String ;
- SwShort = "h" | "a" | "c" | "e" | "u" | "s" | "S"
- | "b" | "k" | "p" | "n" | "g" ;
+ SwShort = "h" | "a" | "c" | "e" | "u" | "s" | "S" | "B"
+ | "b" | "k" | "p" | "n" | "g" | "q";
SwLong = "help"
| "output_info" | "ouput_called" | "output_exported"
- | "output_unsatisfied" | "split_objects" [ _"numbered" ]
+ | "output_unsatisfied" | "split_objects" [ "_numbered" ]
| "ignore_block_errors" | "ignore_checksum_errors"
- | "pause_on_checksum_error"
| "ignore_unknown_block_errors"
- | "ignore_object_integrity" ;
+ | "ignore_object_integrity"
+ | "quiet" ;
StrShort = "o" ;
StrLong = "out_file" ;
\end{verbatim}
+ Some command line examples:\\
+ \verb|ldc2 -ve --output-file=out.dat in.dat|\\
+ \verb|ldc2 -kb test.obj|\\
+
+% | "pause_on_checksum_error"
\newpage
\rd{cfg007}{Configuration implications}{
\begin{itemize}
- \item pause\_on\_checksum\_errors implies ignore\_checksum\_errors.
- \item pause\_on\_checksum\_errors is completely ignored when input
- is read from standard input.
- \item output\_* inhibits tape information output (\req{da001}).
- \item help inhibits all other actions.
+% \item \emph{pause\_on\_checksum\_error} implies \emph{ignore\_checksum\_errors}.
+% \item \emph{pause\_on\_checksum\_error} is completely ignored when input
+% is read from standard input.
+ \item \emph{output\_*} inhibit
+ tape information output (\req{da001}).
+ \item \emph{help} inhibits all other actions.
\end{itemize}
}
\item Data is read from standard input.
\item All error conditions result in immediate program termination
and an error message.
- \item Tape information according to \req{da001} is output.
- \item Text is output to standard output.
+ \item Tape information according to \req{da001} is output to standard output.
\end{itemize}
}
-
-%*******************************************************************************
-\newpage
-\subsection{Error handling}
-
-
-\newcommand{\esup}{
- This error shall lead to an error message and immediate program
- termination or a warning message and program continuation.
-}
-
-\newcommand{\enosup}{
- This error shall always lead to an error message and immediate
- program termination.
-}
-
-\rd{err001}{Error types}{
- The following distinguished error types shall exist:
- \begin{itemize}
- \item Input/output error:\\
- Error occuring during reading from the input file descriptor
- or during writing to an output file.\\
- \enosup
- \item Block integrity error:\\
- Caused by failed check according to \req{chk001}.\\
- \esup
- \item Checksum error:\\
- Caused by failed check according to \req{chk002}.\\
- \esup
- \item Unknown block type error:\\
- Caused by failed check according to \req{chk003}.\\
- \esup
- \item Object integrity error:\\
- Caused by failed check according to \req{chk004}.\\
- \esup
- \item Usage error:\\
- Error caused by errors in the program configuration i.e. wrong
- parameters or impossible combinations of parameters.\\
- \enosup \\
- Additionally, the help (\req{h001}) message is output.
- \item Internal program error:\\
- Error caused by internal program problems.\\
- This error should never occur.\\
- \enosup
- \end{itemize}
-}
-
-\rd{err002}{Program exit codes}{
- \begin{table}[H]
- \begin{center}
- \begin{tabular}{|r|c|}
- \hline
- \multicolumn{1}{|c|}{\bf Exit condition} & \bf Return code\\
- \hline
- Successfull program completion & 0 \\
- File open error & 1\\
- Input/output error & 2\\
- Block integrity error & 3\\
- Checksum error & 4\\
- Unknown block type error & 5\\
- Object integrity error & 6\\
- Usage error & 7\\
- Internal program error & 100 \\
- \hline
- \end{tabular}
- \caption[Program Exit codes]{Exit codes}
- \end{center}
- \end{table}
-}
-
-\rd{err003}{Error and warning messages}{
- Error messages shall consinst of ''Error:'' and the error reason.\\
- Warning messages shall consist of ''Warning:'' and a descriptive
- text.\\
- The following texts shall be used to form error and warning messages:
- \begin{table}[H]
- \begin{center}
- \begin{tabular}{|l|l|}
- \hline
- \bf Error condition & \bf Descriptive text\\ \hline
- File open error & Could not open $<$filename$>$ for reading/writing!\\
- Input error & Could not read from $<$filename$>$!\\
- Output error & Could not write to $<$filename$>$!\\
- Block integrity error & Block integrity check failed!\\
- Checksum error & Block checksum wrong!\\
- Unknown block type & Unknown block type!\\
- Object integrity & Object integrity check failed!\\
- Usage error & $<$Specific message describing the problem$>$\\
- \hline
- \end{tabular}
- \end{center}
- \caption[Program Exit codes]{Exit codes}
- \end{table}
-}
-
-\rd{err004}{Error message output}{
- Any error messages shall be output to standard error.\\
- There shall be no way to suppress error messages.
-}
-
-\rd{err005}{Warning message output}{
- Any warning messages shall be output to standard error.\\
- There shall be a possibility to suppress warning messages.
-}
-
projects / h316.git / blobdiff