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java.lang.Objectmars.assembler.MacroPool
public class MacroPool
Stores information of macros defined by now.
Will be used in first pass of assembling MIPS source code. When reached
.macro
directive, parser calls
MacroPool#BeginMacro(String, int)
and skips source code lines until
reaches .end_macro
directive. then calls
MacroPool#CommitMacro(int)
and the macro information stored in a
Macro
instance will be added to macroList
.
Each MIPSprogram
will have one MacroPool
NOTE: Forward referencing macros (macro expansion before its definition in
source code) and Nested macro definition (defining a macro inside other macro
definition) are not supported.
Constructor Summary | |
---|---|
MacroPool(MIPSprogram mipsProgram)
Create an empty MacroPool for given program |
Method Summary | |
---|---|
void |
beginMacro(Token nameToken)
This method will be called by parser when reached .macro
directive.Instantiates a new Macro object and stores it in current
. |
void |
commitMacro(Token endToken)
This method will be called by parser when reached .end_macro
directive. |
ArrayList<Integer> |
getCallStack()
|
Macro |
getCurrent()
|
String |
getExpansionHistory()
|
Macro |
getMatchingMacro(TokenList tokens,
int callerLine)
Will be called by parser when reaches a macro expansion call |
int |
getNextCounter()
counter will be set to 0 on construction of this class and will
be incremented by each call. |
boolean |
matchesAnyMacroName(String value)
|
void |
popFromCallStack()
|
boolean |
pushOnCallStack(Token token)
|
void |
setCurrent(Macro current)
|
Methods inherited from class java.lang.Object |
---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
---|
public MacroPool(MIPSprogram mipsProgram)
mipsProgram
- associated MIPS programMethod Detail |
---|
public void beginMacro(Token nameToken)
.macro
directive.Macro
object and stores it in current
. current
will be added to macroList
by
#CommitMacro(int)
nameToken
- Token containing name of macro after .macro
directivepublic void commitMacro(Token endToken)
.end_macro
directive. current
macro into the macroList
.
endToken
- Token containing .end_macro
directive in source codepublic Macro getMatchingMacro(TokenList tokens, int callerLine)
tokens
- tokens passed to macro expansion call
Macro
object matching the name and argument count of
tokens passedpublic boolean matchesAnyMacroName(String value)
value
-
value
by now, not concerning arguments count.public Macro getCurrent()
public void setCurrent(Macro current)
public int getNextCounter()
counter
will be set to 0 on construction of this class and will
be incremented by each call. parser calls this method once for every
expansions. it will be a unique id for each expansion of macro in a file
public ArrayList<Integer> getCallStack()
public boolean pushOnCallStack(Token token)
public void popFromCallStack()
public String getExpansionHistory()
|
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