thirdparty/scummvm
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Factorize most of the common code in the isReadable() and isWritable() methods for the AmigaOS backend, via the getFibProtection() method.

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svn-id: r29342
This commit is contained in:
David Corrales 2007-10-31 19:37:34 +00:00
parent dc29c25b71
commit 6afbcc89a7
1 changed files with 50 additions and 48 deletions
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74
backends/fs/amigaos4/amigaos4-fs.cpp
View file

@ -57,6 +57,14 @@ protected:
bool _bIsDirectory;
bool _bIsValid;
/**
* Obtain the FileInfoBlock protection value for this FilesystemNode,
* as defined in the <proto/dos.h> header.
*
* @return -1 if there were errors, 0 or a positive integer otherwise.
*/
virtual int getFibProtection() const;
public:
/**
* Creates a AmigaOSFilesystemNode with the root node as path.
@ -398,6 +406,30 @@ bool AmigaOSFilesystemNode::getChildren(AbstractFSList &myList, ListMode mode, b
return true;
}
int AmigaOSFilesystemNode::getFibProtection() const {
ENTER();
int fibProt = -1;
struct FileInfoBlock *fib = (struct FileInfoBlock *)IDOS->AllocDosObject(DOS_FIB, NULL);
if (!fib) {
debug(6, "FileInfoBlock is NULL");
LEAVE();
return fibProt;
}
BPTR pLock = IDOS->Lock((STRPTR)_sPath.c_str(), SHARED_LOCK);
if (pLock) {
if (IDOS->Examine(pLock, fib) != DOSFALSE) {
fibProt = fib->fib_Protection;
}
IDOS->UnLock(pLock);
}
IDOS->FreeDosObject(DOS_FIB, fib);
LEAVE();
return fibProt;
}
AbstractFilesystemNode *AmigaOSFilesystemNode::getParent() const {
ENTER();
@ -429,64 +461,34 @@ AbstractFilesystemNode *AmigaOSFilesystemNode::getParent() const {
}
bool AmigaOSFilesystemNode::isReadable() const {
ENTER();
bool readable = false;
struct FileInfoBlock *fib = (struct FileInfoBlock *)IDOS->AllocDosObject(DOS_FIB, NULL);
if (!fib) {
debug(6, "FileInfoBlock is NULL");
LEAVE();
return false;
}
int fibProt = getFibProtection();
BPTR pLock = IDOS->Lock((STRPTR)_sPath.c_str(), SHARED_LOCK);
if (pLock) {
if (IDOS->Examine(pLock, fib) != DOSFALSE) {
if (fibProt >= 0) {
/* The fib_Protection flag is low-active or inverted, thus the negation.
*
* For more information, consult the compiler/include/dos/dos.h
* file from the AROS source (http://aros.sourceforge.net/).
*/
if (!(fib->fib_Protection & FIBF_READ)) {
readable = true;
}
}
IDOS->UnLock(pLock);
readable = !(fibProt & FIBF_READ);
}
IDOS->FreeDosObject(DOS_FIB, fib);
LEAVE();
return readable;
}
bool AmigaOSFilesystemNode::isWritable() const {
ENTER();
bool writable = false;
struct FileInfoBlock *fib = (struct FileInfoBlock *)IDOS->AllocDosObject(DOS_FIB, NULL);
if (!fib) {
debug(6, "FileInfoBlock is NULL");
LEAVE();
return false;
}
int fibProt = getFibProtection();
BPTR pLock = IDOS->Lock((STRPTR)_sPath.c_str(), SHARED_LOCK);
if (pLock) {
if (IDOS->Examine(pLock, fib) != DOSFALSE) {
if (fibProt >= 0) {
/* The fib_Protection flag is low-active or inverted, thus the negation.
*
* For more information, consult the compiler/include/dos/dos.h
* file from the AROS source (http://aros.sourceforge.net/).
*/
if (!(fib->fib_Protection & FIBF_WRITE)) {
writable = true;
}
}
IDOS->UnLock(pLock);
writable = !(fibProt & FIBF_WRITE);
}
IDOS->FreeDosObject(DOS_FIB, fib);
LEAVE();
return writable;
}