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CAComponent.cpp

/*    Copyright:  © Copyright 2005 Apple Computer, Inc. All rights reserved.

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*/
/*=============================================================================
      CAComponent.cpp
 
=============================================================================*/

#include "CAComponent.h"
#include "CAComponentDescription.h"
#include "CACFDictionary.h"
#include <stdlib.h>

CAComponent::CAComponent (const ComponentDescription& inDesc, CAComponent* next)
      : mManuName(0), mAUName(0), mCompName(0), mCompInfo (0)
{
      mComp = FindNextComponent ((next ? next->Comp() : NULL), const_cast<ComponentDescription*>(&inDesc));
      if (mComp)
            GetComponentInfo (Comp(), &mDesc, NULL, NULL, NULL);
      else
            memcpy (&mDesc, &inDesc, sizeof(ComponentDescription));
}

CAComponent::CAComponent (const Component& comp) 
      : mComp (comp),
        mManuName(0), 
        mAUName(0), 
        mCompName(0), 
        mCompInfo (0) 
{
      GetComponentInfo (Comp(), &mDesc, NULL, NULL, NULL);
}

CAComponent::CAComponent (const ComponentInstance& compInst) 
      : mComp (Component(compInst)), 
        mManuName(0), 
        mAUName(0), 
        mCompName(0), 
        mCompInfo (0) 
{ 
      GetComponentInfo (Comp(), &mDesc, NULL, NULL, NULL);
}

CAComponent::CAComponent (OSType inType, OSType inSubtype, OSType inManu)
      : mDesc (inType, inSubtype, inManu),
        mManuName(0), mAUName(0), mCompName(0), mCompInfo (0)
{
      mComp = FindNextComponent (NULL, &mDesc);
      GetComponentInfo (Comp(), &mDesc, NULL, NULL, NULL);
}

CAComponent::~CAComponent ()
{
      Clear();
}

OSStatus          CAComponent::GetResourceVersion (UInt32 &outVersion) const
{
      bool versionFound = false;
      short componentResFileID = kResFileNotOpened;
      OSStatus result;
      short thngResourceCount;
      
      short curRes = CurResFile();
      require_noerr (result = OpenAComponentResFile( mComp, &componentResFileID), home);
      require_noerr (result = componentResFileID <= 0, home);
      
      UseResFile(componentResFileID);

      thngResourceCount = Count1Resources(kComponentResourceType);
      
      require_noerr (result = ResError(), home);
                  // only go on if we successfully found at least 1 thng resource
      require_noerr (thngResourceCount <= 0 ? -1 : 0, home);

      // loop through all of the Component thng resources trying to 
      // find one that matches this Component description
      for (short i = 0; i < thngResourceCount && (!versionFound); i++)
      {
            // try to get a handle to this code resource
            Handle thngResourceHandle = Get1IndResource(kComponentResourceType, i+1);
            if (thngResourceHandle != NULL && ((*thngResourceHandle) != NULL))
            {
                  if (UInt32(GetHandleSize(thngResourceHandle)) >= sizeof(ExtComponentResource))
                  {
                        ExtComponentResource * componentThng = (ExtComponentResource*) (*thngResourceHandle);

                        // check to see if this is the thng resource for the particular Component that we are looking at
                        // (there often is more than one Component described in the resource)
                        if ((componentThng->cd.componentType == mDesc.Type()) 
                                    && (componentThng->cd.componentSubType == mDesc.SubType()) 
                                    && (componentThng->cd.componentManufacturer == mDesc.Manu()))
                        {
                              outVersion = componentThng->componentVersion;
                              versionFound = true;
                        }
                  }
                  ReleaseResource(thngResourceHandle);
            }
      }

      if (!versionFound)
            result = resNotFound;
            
      UseResFile(curRes);     // revert
      
      if ( componentResFileID != kResFileNotOpened )
            CloseComponentResFile(componentResFileID);
            
home:
      return result;
}

void              CAComponent::Clear ()
{
      if (mManuName) { CFRelease (mManuName); mManuName = 0; }
      if (mAUName) { CFRelease (mAUName);  mAUName = 0; }
      if (mCompName) { CFRelease (mCompName); mCompName = 0; }
      if (mCompInfo) { CFRelease (mCompInfo); mCompInfo = 0; }
}

CAComponent&      CAComponent::operator= (const CAComponent& y)
{
      Clear();

      mComp = y.mComp;
      mDesc = y.mDesc;

      if (y.mManuName) { mManuName = y.mManuName; CFRetain (mManuName); }
      if (y.mAUName) { mAUName = y.mAUName; CFRetain (mAUName); }
      if (y.mCompName) { mCompName = y.mCompName; CFRetain (mCompName); } 
      if (y.mCompInfo) { mCompInfo = y.mCompInfo; CFRetain (mCompInfo); }

      return *this;
}

void        CAComponent::SetCompNames () const
{
      if (!mCompName) {
            Handle h1 = NewHandle(4);
            CAComponentDescription desc;
            OSStatus err = GetComponentInfo (Comp(), &desc, h1, 0, 0);
            
            if (err) { DisposeHandle(h1); return; }
            
            HLock(h1);
            char* ptr1 = *h1;
            // Get the manufacturer's name... look for the ':' character convention
            int len = *ptr1++;
            char* displayStr = 0;

            const_cast<CAComponent*>(this)->mCompName = CFStringCreateWithPascalString(NULL, (const unsigned char*)*h1, kCFStringEncodingMacRoman);
                        
            for (int i = 0; i < len; ++i) {
                  if (ptr1[i] == ':') { // found the name
                        ptr1[i] = 0;
                        displayStr = ptr1;
                        break;
                  }
            }
            
            if (displayStr)
            {
                  const_cast<CAComponent*>(this)->mManuName = CFStringCreateWithCString(NULL, displayStr, kCFStringEncodingMacRoman);
                                                            
                  //move displayStr ptr past the manu, to the name
                  // we move the characters down a index, because the handle doesn't have any room
                  // at the end for the \0
                  int i = strlen(displayStr), j = 0;
                  while (displayStr[++i] == ' ' && i < len)
                              ;
                  while (i < len)
                        displayStr[j++] = displayStr[i++];
                  displayStr[j] = 0;

                  const_cast<CAComponent*>(this)->mAUName = CFStringCreateWithCString(NULL, displayStr, kCFStringEncodingMacRoman);
            } 
            
            DisposeHandle (h1);
      }
}

void  CAComponent::SetCompInfo () const
{
      if (!mCompInfo) {
            Handle h1 = NewHandle(4);
            CAComponentDescription desc;
            OSStatus err = GetComponentInfo (Comp(), &desc, 0, h1, 0);
            if (err) return;
            HLock (h1);
            const_cast<CAComponent*>(this)->mCompInfo = CFStringCreateWithPascalString(NULL, (const unsigned char*)*h1, kCFStringEncodingMacRoman);

            DisposeHandle (h1);
      }
}

void  _ShowCF (FILE* file, CFStringRef str)
{
      if (CFGetTypeID(str) != CFStringGetTypeID()) {
            CFShow(str);
            return;
      }

      UInt32 len = CFStringGetLength(str);
      char* chars = (char*)malloc (len * 2); // give us plenty of room for unichar chars
      if (CFStringGetCString (str, chars, len * 2, kCFStringEncodingUTF8))
            fprintf (file, "%s", chars);
      else
            CFShow (str);

      free (chars);
}

void  CAComponent::Print(FILE* file) const
{
      fprintf (file, "CAComponent: 0x%X", int(Comp()));
      if (mManuName) {
            fprintf (file, ", Manu:"); _ShowCF (file, mManuName);
            if (mAUName) fprintf (file, ", Name:"); _ShowCF (file, mAUName);
      }
      fprintf (file, ", "); 
      Desc ().Print(file);
}

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