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adolphenom 0da1c5dcca Source code of MARS Assembler 
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AbstractSyscall
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mars.mips.instructions.syscalls</FONT>
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Class AbstractSyscall</H2>
<PRE>
<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</A>
<IMG SRC="../../../../resources/inherit.gif" ALT="extended by "><B>mars.mips.instructions.syscalls.AbstractSyscall</B>
</PRE>
<DL>
<DT><B>All Implemented Interfaces:</B> <DD><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></DD>
</DL>
<DL>
<DT><B>Direct Known Subclasses:</B> <DD><A HREF="../../../../mars/mips/instructions/syscalls/SyscallClose.html" title="class in mars.mips.instructions.syscalls">SyscallClose</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallConfirmDialog.html" title="class in mars.mips.instructions.syscalls">SyscallConfirmDialog</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallExit.html" title="class in mars.mips.instructions.syscalls">SyscallExit</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallExit2.html" title="class in mars.mips.instructions.syscalls">SyscallExit2</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallInputDialogDouble.html" title="class in mars.mips.instructions.syscalls">SyscallInputDialogDouble</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallInputDialogFloat.html" title="class in mars.mips.instructions.syscalls">SyscallInputDialogFloat</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallInputDialogInt.html" title="class in mars.mips.instructions.syscalls">SyscallInputDialogInt</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallInputDialogString.html" title="class in mars.mips.instructions.syscalls">SyscallInputDialogString</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMessageDialog.html" title="class in mars.mips.instructions.syscalls">SyscallMessageDialog</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMessageDialogDouble.html" title="class in mars.mips.instructions.syscalls">SyscallMessageDialogDouble</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMessageDialogFloat.html" title="class in mars.mips.instructions.syscalls">SyscallMessageDialogFloat</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMessageDialogInt.html" title="class in mars.mips.instructions.syscalls">SyscallMessageDialogInt</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMessageDialogString.html" title="class in mars.mips.instructions.syscalls">SyscallMessageDialogString</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMidiOut.html" title="class in mars.mips.instructions.syscalls">SyscallMidiOut</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallMidiOutSync.html" title="class in mars.mips.instructions.syscalls">SyscallMidiOutSync</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallOpen.html" title="class in mars.mips.instructions.syscalls">SyscallOpen</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintChar.html" title="class in mars.mips.instructions.syscalls">SyscallPrintChar</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintDouble.html" title="class in mars.mips.instructions.syscalls">SyscallPrintDouble</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintFloat.html" title="class in mars.mips.instructions.syscalls">SyscallPrintFloat</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintInt.html" title="class in mars.mips.instructions.syscalls">SyscallPrintInt</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintIntBinary.html" title="class in mars.mips.instructions.syscalls">SyscallPrintIntBinary</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintIntHex.html" title="class in mars.mips.instructions.syscalls">SyscallPrintIntHex</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintIntUnsigned.html" title="class in mars.mips.instructions.syscalls">SyscallPrintIntUnsigned</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallPrintString.html" title="class in mars.mips.instructions.syscalls">SyscallPrintString</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRandDouble.html" title="class in mars.mips.instructions.syscalls">SyscallRandDouble</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRandFloat.html" title="class in mars.mips.instructions.syscalls">SyscallRandFloat</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRandInt.html" title="class in mars.mips.instructions.syscalls">SyscallRandInt</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRandIntRange.html" title="class in mars.mips.instructions.syscalls">SyscallRandIntRange</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRandSeed.html" title="class in mars.mips.instructions.syscalls">SyscallRandSeed</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallRead.html" title="class in mars.mips.instructions.syscalls">SyscallRead</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallReadChar.html" title="class in mars.mips.instructions.syscalls">SyscallReadChar</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallReadDouble.html" title="class in mars.mips.instructions.syscalls">SyscallReadDouble</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallReadFloat.html" title="class in mars.mips.instructions.syscalls">SyscallReadFloat</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallReadInt.html" title="class in mars.mips.instructions.syscalls">SyscallReadInt</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallReadString.html" title="class in mars.mips.instructions.syscalls">SyscallReadString</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallSbrk.html" title="class in mars.mips.instructions.syscalls">SyscallSbrk</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallSleep.html" title="class in mars.mips.instructions.syscalls">SyscallSleep</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallTime.html" title="class in mars.mips.instructions.syscalls">SyscallTime</A>, <A HREF="../../../../mars/mips/instructions/syscalls/SyscallWrite.html" title="class in mars.mips.instructions.syscalls">SyscallWrite</A></DD>
</DL>
<HR>
<DL>
<DT><PRE>public abstract class <B>AbstractSyscall</B><DT>extends <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A><DT>implements <A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></DL>
</PRE>
<P>
Abstract class that a MIPS syscall system service may extend. A qualifying service
must be a class in the mars.mips.instructions.syscalls package that
implements the Syscall interface, must be compiled into a .class file,
and its .class file must be in the same folder as Syscall.class.
Mars will detect a qualifying syscall upon startup, create an instance
using its no-argument constructor and add it to its syscall list.
When its service is invoked at runtime ("syscall" instruction
with its service number stored in register $v0), its simulate()
method will be invoked.
<P>
<P>
<HR>
<P>
<!-- ======== CONSTRUCTOR SUMMARY ======== -->
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<TD><CODE><B><A HREF="../../../../mars/mips/instructions/syscalls/AbstractSyscall.html#AbstractSyscall(int, java.lang.String)">AbstractSyscall</A></B>(int&nbsp;number,
<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;name)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Constructor is provided so subclass may initialize instance variables.</TD>
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<B>Method Summary</B></FONT></TH>
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<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A></CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../mars/mips/instructions/syscalls/AbstractSyscall.html#getName()">getName</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the name you have chosen for this syscall.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../mars/mips/instructions/syscalls/AbstractSyscall.html#getNumber()">getNumber</A></B>()</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Return the assigned service number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>&nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../mars/mips/instructions/syscalls/AbstractSyscall.html#setNumber(int)">setNumber</A></B>(int&nbsp;num)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Set the service number.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>abstract &nbsp;void</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../mars/mips/instructions/syscalls/AbstractSyscall.html#simulate(mars.ProgramStatement)">simulate</A></B>(<A HREF="../../../../mars/ProgramStatement.html" title="class in mars">ProgramStatement</A>&nbsp;statement)</CODE>
<BR>
&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Performs syscall function.</TD>
</TR>
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<TH ALIGN="left"><B>Methods inherited from class java.lang.<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">Object</A></B></TH>
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<TR BGCOLOR="white" CLASS="TableRowColor">
<TD><CODE><A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#clone()" title="class or interface in java.lang">clone</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#equals(java.lang.Object)" title="class or interface in java.lang">equals</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#finalize()" title="class or interface in java.lang">finalize</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#getClass()" title="class or interface in java.lang">getClass</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#hashCode()" title="class or interface in java.lang">hashCode</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notify()" title="class or interface in java.lang">notify</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#notifyAll()" title="class or interface in java.lang">notifyAll</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#toString()" title="class or interface in java.lang">toString</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait()" title="class or interface in java.lang">wait</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long)" title="class or interface in java.lang">wait</A>, <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/Object.html?is-external=true#wait(long, int)" title="class or interface in java.lang">wait</A></CODE></TD>
</TR>
</TABLE>
&nbsp;
<P>
<!-- ========= CONSTRUCTOR DETAIL ======== -->
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<TABLE BORDER="1" WIDTH="100%" CELLPADDING="3" CELLSPACING="0" SUMMARY="">
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<A NAME="AbstractSyscall(int, java.lang.String)"><!-- --></A><H3>
AbstractSyscall</H3>
<PRE>
public <B>AbstractSyscall</B>(int&nbsp;number,
<A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A>&nbsp;name)</PRE>
<DL>
<DD>Constructor is provided so subclass may initialize instance variables.
<P>
<DL>
<DT><B>Parameters:</B><DD><CODE>number</CODE> - default assigned service number<DD><CODE>name</CODE> - service name which may be used for reference independent of number</DL>
</DL>
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<A NAME="getName()"><!-- --></A><H3>
getName</H3>
<PRE>
public <A HREF="http://docs.oracle.com/javase/1.5.0/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</A> <B>getName</B>()</PRE>
<DL>
<DD>Return the name you have chosen for this syscall. This can be used by a MARS
user to refer to the service when choosing to override its default service
number in the configuration file.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html#getName()">getName</A></CODE> in interface <CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>service name as a string</DL>
</DD>
</DL>
<HR>
<A NAME="setNumber(int)"><!-- --></A><H3>
setNumber</H3>
<PRE>
public void <B>setNumber</B>(int&nbsp;num)</PRE>
<DL>
<DD>Set the service number. This is provided to allow MARS implementer or user
to override the default service number.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html#setNumber(int)">setNumber</A></CODE> in interface <CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>num</CODE> - specified service number to override the default.</DL>
</DD>
</DL>
<HR>
<A NAME="getNumber()"><!-- --></A><H3>
getNumber</H3>
<PRE>
public int <B>getNumber</B>()</PRE>
<DL>
<DD>Return the assigned service number. This is the number the MIPS programmer
must store into $v0 before issuing the SYSCALL instruction.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html#getNumber()">getNumber</A></CODE> in interface <CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Returns:</B><DD>assigned service number</DL>
</DD>
</DL>
<HR>
<A NAME="simulate(mars.ProgramStatement)"><!-- --></A><H3>
simulate</H3>
<PRE>
public abstract void <B>simulate</B>(<A HREF="../../../../mars/ProgramStatement.html" title="class in mars">ProgramStatement</A>&nbsp;statement)
throws <A HREF="../../../../mars/ProcessingException.html" title="class in mars">ProcessingException</A></PRE>
<DL>
<DD>Performs syscall function. It will be invoked when the service is invoked
at simulation time. Service is identified by value stored in $v0.
<P>
<DD><DL>
<DT><B>Specified by:</B><DD><CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html#simulate(mars.ProgramStatement)">simulate</A></CODE> in interface <CODE><A HREF="../../../../mars/mips/instructions/syscalls/Syscall.html" title="interface in mars.mips.instructions.syscalls">Syscall</A></CODE></DL>
</DD>
<DD><DL>
<DT><B>Parameters:</B><DD><CODE>statement</CODE> - ProgramStatement object for this syscall instruction.
<DT><B>Throws:</B>
<DD><CODE><A HREF="../../../../mars/ProcessingException.html" title="class in mars">ProcessingException</A></CODE></DL>
</DD>
</DL>
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