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// =================================================================================================
// Copyright Adobe
// Copyright 2010 Adobe
// All Rights Reserved
//
// NOTICE: Adobe permits you to use, modify, and distribute this file in accordance with the terms
// of the Adobe license agreement accompanying it.
// =================================================================================================
#include "public/include/XMP_Environment.h" // ! XMP_Environment.h must be the first included header.
#include "public/include/XMP_Const.h"
#include "public/include/XMP_IO.hpp"
#include "source/XIO.hpp"
#include "source/XMP_LibUtils.hpp"
#include "source/UnicodeConversions.hpp"
#if XMP_WinBuild
#pragma warning ( disable : 4800 ) // forcing value to bool 'true' or 'false' (performance warning)
#endif
// =================================================================================================
static inline void MakeLowerCase ( std::string * str )
{
for ( size_t i = 0, limit = str->size(); i < limit; ++i ) {
char ch = (*str)[i];
if ( ('A' <= ch) && (ch <= 'Z') ) (*str)[i] += 0x20;
}
}
// =================================================================================================
// XIO::SplitLeafName
// ==================
void XIO::SplitLeafName ( std::string * path, std::string * leafName )
{
size_t dirPos = path->size();
// Return if path is empty or just the slash
if ( dirPos == 0 || (dirPos == 1 && (*path)[dirPos-1] == kDirChar) )
{
leafName->erase();
path->erase();
return;
}
// Remove trailing slashes
--dirPos;
#if XMP_WinBuild
if ( (*path)[dirPos] == '/' ) (*path)[dirPos] = kDirChar; // Tolerate both '\' and '/'.
#endif
if ( (*path)[dirPos] == kDirChar )
{
path->erase(dirPos);
}
// Search next slash
for ( --dirPos; dirPos > 0; --dirPos ) {
#if XMP_WinBuild
if ( (*path)[dirPos] == '/' ) (*path)[dirPos] = kDirChar; // Tolerate both '\' and '/'.
#endif
if ( (*path)[dirPos] == kDirChar ) break;
}
if ( (*path)[dirPos] == kDirChar ) {
leafName->assign ( &(*path)[dirPos+1] );
path->erase ( dirPos );
} else if ( dirPos == 0 ) {
leafName->erase();
leafName->swap ( *path );
}
} // XIO::SplitLeafName
// =================================================================================================
// XIO::SplitFileExtension
// =======================
//
// ! Must only be called after using SplitLeafName!
void XIO::SplitFileExtension ( std::string * leafName, std::string * fileExt , bool lowercase )
{
fileExt->erase();
size_t extPos = leafName->size();
if ( extPos == 0 ) return;
for ( --extPos; extPos > 0; --extPos ) if ( (*leafName)[extPos] == '.' ) break;
if ( (*leafName)[extPos] == '.' ) {
fileExt->assign ( &((*leafName)[extPos+1]) );
if (lowercase) MakeLowerCase ( fileExt );
leafName->erase ( extPos );
}
} // XIO::SplitFileExtension
// =================================================================================================
// XIO::ReplaceTextFile
// ====================
//
// Replace the contents of a text file in a manner that preserves the meaning of the old content if
// a disk full error occurs. This can mean appended spaces appear in the old content.
void XIO::ReplaceTextFile ( XMP_IO* textFile, const std::string & newContent, bool doSafeUpdate )
{
XMP_Int64 newContentSize = (XMP_Int64)newContent.size();
XMP_Enforce ( newContentSize <= (XMP_Int64)0xFFFFFFFFULL ); // Make sure it fits in UInt32 for Write.
if ( doSafeUpdate ) {
// Safe updates are no problem, the old content is untouched if the temp file write fails.
XMP_IO* tempFile = textFile->DeriveTemp();
tempFile->Write ( newContent.data(), (XMP_Uns32)newContentSize );
textFile->AbsorbTemp();
} else {
// We're overwriting the existing file. Make sure it is big enough, write the new content,
// then truncate if necessary.
XMP_Int64 oldContentSize = textFile->Length();
if ( oldContentSize < newContentSize ) {
size_t spaceCount = (size_t) (newContentSize - oldContentSize); // AUDIT: newContentSize fits in UInt32.
std::string spaces;
spaces.assign ( spaceCount, ' ' );
textFile->ToEOF();
textFile->Write ( spaces.data(), (XMP_Uns32)spaceCount );
}
XMP_Assert ( newContentSize <= textFile->Length() );
textFile->Rewind();
textFile->Write ( newContent.data(), (XMP_Uns32)newContentSize );
if ( oldContentSize > newContentSize ) textFile->Truncate ( newContentSize );
}
} // XIO::ReplaceTextFile
// =================================================================================================
// XIO::Copy
// =========
void XIO::Copy ( XMP_IO* sourceFile, XMP_IO* destFile, XMP_Int64 length,
XMP_AbortProc abortProc /* = 0 */, void* abortArg /* = 0 */ )
{
const bool checkAbort = (abortProc != 0);
XMP_Uns8 buffer [64*1024];
while ( length > 0 ) {
if ( checkAbort && abortProc(abortArg) ) {
XMP_Throw ( "XIO::Copy, user abort", kXMPErr_UserAbort );
}
XMP_Int32 ioCount = sizeof(buffer);
if ( length < ioCount ) ioCount = (XMP_Int32)length;
sourceFile->Read ( buffer, ioCount, XMP_IO::kReadAll );
destFile->Write ( buffer, ioCount );
length -= ioCount;
}
} // XIO::Copy
// =================================================================================================
// XIO::Move
// =========
// allows to move data within a file (just pass in the same file handle as srcFile and dstFile)
// shadow effects (stumbling over just-written data) are avoided.
//
// * however can also be used to move data between two files *
// (having both option is handy for flexible use in update()/re-write() handler routines)
void XIO::Move ( XMP_IO* srcFile, XMP_Int64 srcOffset,
XMP_IO* dstFile, XMP_Int64 dstOffset,
XMP_Int64 length, XMP_AbortProc abortProc /* = 0 */, void * abortArg /* = 0 */ )
{
enum { kBufferLen = 64*1024 };
XMP_Uns8 buffer [kBufferLen];
const bool checkAbort = (abortProc != 0);
if ( srcOffset > dstOffset ) { // avoiding shadow effects
// move down -> shift lowest packet first !
while ( length > 0 ) {
if ( checkAbort && abortProc(abortArg) ) XMP_Throw ( "XIO::Move - User abort", kXMPErr_UserAbort );
XMP_Int32 ioCount = kBufferLen;
if ( length < kBufferLen ) ioCount = (XMP_Int32)length; //smartly avoids 32/64 bit issues
srcFile->Seek ( srcOffset, kXMP_SeekFromStart );
srcFile->ReadAll ( buffer, ioCount );
dstFile->Seek ( dstOffset, kXMP_SeekFromStart );
dstFile->Write ( buffer, ioCount );
length -= ioCount;
srcOffset += ioCount;
dstOffset += ioCount;
}
} else { // move up -> shift highest packet first
srcOffset += length; //move to end
dstOffset += length;
while ( length > 0 ) {
if ( checkAbort && abortProc(abortArg) ) XMP_Throw ( "XIO::Move - User abort", kXMPErr_UserAbort );
XMP_Int32 ioCount = kBufferLen;
if ( length < kBufferLen ) ioCount = (XMP_Int32)length; //smartly avoids 32/64 bit issues
srcOffset -= ioCount;
dstOffset -= ioCount;
srcFile->Seek ( srcOffset, kXMP_SeekFromStart );
srcFile->ReadAll ( buffer, ioCount );
dstFile->Seek ( dstOffset, kXMP_SeekFromStart );
dstFile->Write ( buffer, ioCount );
length -= ioCount;
}
}
} // XIO::Move
// =================================================================================================
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