DIRECTORY
TargetArchitecture,
BreakWorldArchitecture,
RefTab,
Breakpoint,
Shepherd,
Rope;

BreakpointImpl: CEDAR PROGRAM 
IMPORTS Breakpoint, RefTab, BreakWorldArchitecture
EXPORTS Breakpoint, BreakWorldArchitecture
~ {
BreakAccess: PUBLIC TYPE ~ Breakpoint.BreakAccess _ Breakpoint.nullBreakAccess;
BreakAccessRep: PUBLIC TYPE ~ Breakpoint.BreakAccessRep;

BreakAccessData: PUBLIC TYPE ~ REF BreakAccessDataRep _ Breakpoint.nullBreakAccessData;
BreakAccessDataRep: PUBLIC TYPE ~ RECORD [
breakTable: RefTab.Ref _ NIL
];

Break: PUBLIC TYPE ~ REF BreakRep _ Breakpoint.nullBreak;
BreakRep: PUBLIC TYPE ~ RECORD [
breakAccess: Breakpoint.BreakAccess,
address: BreakWorldArchitecture.Address,
patch: Shepherd.Patch,
clientData: Breakpoint.ClientData
];

NewBreakAccess: PUBLIC PROCEDURE [] 
RETURNS [Breakpoint.BreakAccess] ~{
procs: Breakpoint.BreakAccessProcs ~ NEW[Breakpoint.BreakAccessProcsRep _ [
set: Breakpoint.SetBreakpoint, 
clear: Breakpoint.ClearBreakpoint, 
enumerate: Breakpoint.EnumerateBreakpoints]];
data: Breakpoint.BreakAccessData ~ NEW[BreakAccessDataRep _ [
breakTable: RefTab.Create[]]];
breakAccess: Breakpoint.BreakAccess ~ NEW[Breakpoint.BreakAccessRep _ 
[procs: procs, data: data]];

RETURN [breakAccess];
};

EnumerateBreakpoints: PUBLIC Breakpoint.EnumerateBreakProc ~ {
Apply: RefTab.EachPairAction ~ {
break: Break ~ NARROW[val];
clientData: Breakpoint.ClientData ~ Breakpoint.ClientDataFromBreak[break: break];

quit _ proc[clientData: clientData];
RETURN [quit: quit];
};
breakAccess: Breakpoint.BreakAccess ~ 
BreakWorldArchitecture.BreakAccessFromBreakWorld[breakWorld: breakWorld];
breakTable: RefTab.Ref ~ BreakTableFromBreakAccess[breakAccess: breakAccess];

IF breakTable = NIL THEN {
ERROR Breakpoint.Cant[
code: $NullBreakTable, message: "EnumerateBreakpoints[nullBreakTable]"];
};
quit _ breakTable.Pairs[action: Apply];
RETURN [quit: quit];
};

RememberBreak: PUBLIC PROCEDURE [break: Break] ~ {
breakAccess: Breakpoint.BreakAccess ~ 
BreakAccessFromBreak[break: break];
breakTable: RefTab.Ref ~ BreakTableFromBreakAccess[breakAccess: breakAccess];

IF breakTable = NIL THEN {
ERROR Breakpoint.Cant[
code: $NullBreakTable, message: "RememberBreak[nullBreakTable]"];
};
IF NOT breakTable.Insert[key: break, val: break] THEN {
ERROR Breakpoint.Cant[code: $CantRememberBreak, message: "Can't remember break"];
};
RETURN;
};

ForgetBreak: PUBLIC PROCEDURE [break: Break] ~ {
breakAccess: Breakpoint.BreakAccess ~ BreakAccessFromBreak[break: break];
breakTable: RefTab.Ref ~ BreakTableFromBreakAccess[breakAccess: breakAccess];

IF breakTable = NIL THEN {
ERROR Breakpoint.Cant[
code: $NullBreakTable, message: "ForgetBreak[nullBreakTable]"];
};
IF NOT breakTable.Delete[key: break] THEN {
ERROR Breakpoint.Cant[code: $CantForgetBreak, message: "Can't forget break"];
};
RETURN;
};

NewBreak: PUBLIC PROCEDURE [
address: BreakWorldArchitecture.Address,
patch: Shepherd.Patch,
clientData: Breakpoint.ClientData]
RETURNS [Breakpoint.Break] ~ {
breakWorld: BreakWorldArchitecture.BreakWorld ~ 
BreakWorldArchitecture.BreakWorldFromBreakWorldAddress[address: address];
breakAccess: Breakpoint.BreakAccess ~ 
BreakWorldArchitecture.BreakAccessFromBreakWorld[breakWorld: breakWorld];
break: Breakpoint.Break ~ NEW[BreakRep _ [
breakAccess: breakAccess, address: address, patch: patch, clientData: clientData]];

RETURN [break];
};

IsNullBreak: PUBLIC PROCEDURE [break: Breakpoint.Break] RETURNS [BOOLEAN] ~ {
RETURN [break = Breakpoint.nullBreak];
};

AddressFromBreak: PUBLIC PROCEDURE [break: Breakpoint.Break] 
RETURNS [BreakWorldArchitecture.Address] ~ {
IF break.IsNullBreak[] THEN {
ERROR Breakpoint.Cant[code: $NullBreak, message: "AddressFromBreak[nullBreak]"];
};
RETURN [break.address];
};

PatchFromBreak: PUBLIC PROCEDURE [break: Breakpoint.Break] 
RETURNS [Shepherd.Patch] ~ {
IF break.IsNullBreak[] THEN {
ERROR Breakpoint.Cant[code: $NullBreak, message: "PatchFromBreak[nullBreak]"];
};
RETURN [break.patch];
};

ClientDataFromBreak: PUBLIC PROCEDURE [break: Breakpoint.Break] 
RETURNS [Breakpoint.ClientData] ~ {
IF break.IsNullBreak[] THEN {
ERROR Breakpoint.Cant[code: $NullBreak, message: "ClientDataFromBreak[nullBreak]"];
};
RETURN [break.clientData];
};

BreakAccessFromBreak: PROCEDURE [break: Break] RETURNS [Breakpoint.BreakAccess] ~ {
IF Breakpoint.IsNullBreak[break: break] THEN {
ERROR Breakpoint.Cant[
code: $NullBreak, message: "BreakAccessFromBreak[nullBreak]"];
};
RETURN [break.breakAccess];
};

BreakTableFromBreakAccess: PROCEDURE [breakAccess: Breakpoint.BreakAccess]
RETURNS [RefTab.Ref] ~ {
IF breakAccess = Breakpoint.nullBreakAccess THEN {
ERROR Breakpoint.Cant[code: $NullBreakAccess, message: "Null breakAccess"];
};
IF breakAccess.data = Breakpoint.nullBreakAccessData THEN {
ERROR Breakpoint.Cant[code: $NullBreakAccessData, message: "Null breakAccess.data"];
};
RETURN [breakAccess.data.breakTable];
};

}.
   È  
BreakpointImpl.mesa
Copyright Ó 1989, 1990 by Xerox Corporation.  All rights reserved.
Peter B. Kessler, April 19, 1990 10:38 am PDT

Public Types EXPORTed to BreakWorldArchitecture
Public Types EXPORTed to Breakpoint
Public Procedures EXPORTed to Breakpoint
PROCEDURE [breakWorld: BreakWorldArchitecture.BreakWorld, proc: BreakpointProc] 
RETURNS [quit: BOOLEAN _ FALSE];
PROC [key: Key, val: Val] RETURNS [quit: BOOL _ FALSE]
Private Procedures

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