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Added open/close sanity checks.

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This commit is contained in:
arookas 2015-12-27 21:04:29 -05:00
parent a5ec72e1f9
commit af2a00f225
1 changed files with 11 additions and 0 deletions
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11
ssc/context.cs
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@ -8,6 +8,7 @@ namespace arookas
{ {
class sunContext class sunContext
{ {
bool mOpen;
aBinaryWriter mWriter; aBinaryWriter mWriter;
uint mTextOffset, mDataOffset, mSymbolOffset; uint mTextOffset, mDataOffset, mSymbolOffset;
int mVarCount; int mVarCount;
@ -34,6 +35,10 @@ namespace arookas
} }
public void Open(Stream output, sunImportResolver importResolver) public void Open(Stream output, sunImportResolver importResolver)
{ {
if (mOpen)
{
throw new InvalidOperationException();
}
if (output == null) if (output == null)
{ {
throw new ArgumentNullException("output"); throw new ArgumentNullException("output");
@ -42,6 +47,7 @@ namespace arookas
{ {
throw new ArgumentNullException("importResolver"); throw new ArgumentNullException("importResolver");
} }
mOpen = true;
DataTable.Clear(); DataTable.Clear();
SymbolTable.Clear(); SymbolTable.Clear();
Scopes.Clear(); Scopes.Clear();
@ -70,6 +76,10 @@ namespace arookas
} }
public void Close() public void Close()
{ {
if (!mOpen)
{
throw new InvalidOperationException();
}
mWriter.PopAnchor(); mWriter.PopAnchor();
mDataOffset = (uint)mWriter.Position; mDataOffset = (uint)mWriter.Position;
DataTable.Write(mWriter); DataTable.Write(mWriter);
@ -77,6 +87,7 @@ namespace arookas
SymbolTable.Write(mWriter); SymbolTable.Write(mWriter);
mWriter.Goto(0); mWriter.Goto(0);
WriteHeader(); WriteHeader();
mOpen = false;
} }
// imports/compilation // imports/compilation