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lightning-sunbird  0.9+nobinonly
morkBlob.cpp
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00001 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-  */
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00037 
00038 #ifndef _MDB_
00039 #include "mdb.h"
00040 #endif
00041 
00042 #ifndef _MORK_
00043 #include "mork.h"
00044 #endif
00045 
00046 #ifndef _MORKBLOB_
00047 #include "morkBlob.h"
00048 #endif
00049 
00050 #ifndef _MORKENV_
00051 #include "morkEnv.h"
00052 #endif
00053 
00054 
00055 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00056 
00057 /*static*/ void
00058 morkBuf::NilBufBodyError(morkEnv* ev)
00059 {
00060   ev->NewError("nil mBuf_Body");
00061 }
00062 
00063 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00064 
00065 /*static*/ void
00066 morkBlob::BlobFillOverSizeError(morkEnv* ev)
00067 {
00068   ev->NewError("mBuf_Fill > mBlob_Size");
00069 }
00070 
00071 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00072 
00073 mork_bool
00074 morkBlob::GrowBlob(morkEnv* ev, nsIMdbHeap* ioHeap, mork_size inNewSize)
00075 {
00076   if ( ioHeap )
00077   {
00078     if ( !mBuf_Body ) // no body? implies zero sized?
00079       mBlob_Size = 0;
00080       
00081     if ( mBuf_Fill > mBlob_Size ) // fill more than size?
00082     {
00083       ev->NewWarning("mBuf_Fill > mBlob_Size");
00084       mBuf_Fill = mBlob_Size;
00085     }
00086       
00087     if ( inNewSize > mBlob_Size ) // need to allocate larger blob?
00088     {
00089       mork_u1* body = 0;
00090       ioHeap->Alloc(ev->AsMdbEnv(), inNewSize, (void**) &body);
00091       if ( body && ev->Good() )
00092       {
00093         void* oldBody = mBuf_Body;
00094         if ( mBlob_Size ) // any old content to transfer?
00095           MORK_MEMCPY(body, oldBody, mBlob_Size);
00096         
00097         mBlob_Size = inNewSize; // install new size
00098         mBuf_Body = body; // install new body
00099         
00100         if ( oldBody ) // need to free old buffer body?
00101           ioHeap->Free(ev->AsMdbEnv(), oldBody);
00102       }
00103     }
00104   }
00105   else
00106     ev->NilPointerError();
00107     
00108   if ( ev->Good() && mBlob_Size < inNewSize )
00109     ev->NewError("mBlob_Size < inNewSize");
00110     
00111   return ev->Good();
00112 }
00113 
00114 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789
00115 
00116 morkCoil::morkCoil(morkEnv* ev, nsIMdbHeap* ioHeap)
00117 {
00118   mBuf_Body = 0;
00119   mBuf_Fill = 0;
00120   mBlob_Size = 0;
00121   mText_Form = 0;
00122   mCoil_Heap = ioHeap;
00123   if ( !ioHeap )
00124     ev->NilPointerError();
00125 }
00126 
00127 void
00128 morkCoil::CloseCoil(morkEnv* ev)
00129 {
00130   void* body = mBuf_Body;
00131   nsIMdbHeap* heap = mCoil_Heap;
00132 
00133   mBuf_Body = 0;
00134   mCoil_Heap = 0;
00135   
00136   if ( body && heap )
00137   {
00138     heap->Free(ev->AsMdbEnv(), body);
00139   }
00140 }
00141 
00142 //3456789_123456789_123456789_123456789_123456789_123456789_123456789_123456789