diff -r 48780e181b38 -r 578be2adaf3e Symbian3/PDK/Source/GUID-00025EAD-C4B6-5408-96A3-FFDBBBDC7CAB.dita --- a/Symbian3/PDK/Source/GUID-00025EAD-C4B6-5408-96A3-FFDBBBDC7CAB.dita Tue Jul 20 12:00:49 2010 +0100 +++ b/Symbian3/PDK/Source/GUID-00025EAD-C4B6-5408-96A3-FFDBBBDC7CAB.dita Fri Aug 13 16:47:46 2010 +0100 @@ -1,48 +1,48 @@ - - - - - -How -to read and write a fileThis topic describes how to reading transfer data from a file to -a descriptor, and writing transfers data from a descriptor to a file. -

Reading transfers data from a file to a descriptor, and writing transfers -data from a descriptor to a file.

-

Use RFile::Read() to read, and RFile::Write() to -write.

-// Open file1 -_LIT(KMyFile,"c:\\documents\\file1"); -RFile myFile; -User::LeaveIfError(myFile.Open(fs,KMyFile,EFileShareExclusive|EFileWrite -)); - -// Write to current file position: start of file -_LIT8(KWriteBuf,"write data"); -myFile.Write(KWriteBuf); - -// Read from position 0: start of file -TBuf8<6> readBuf1; -myFile.Read(0,readBuf1); // readBuf1 is now "write " - -// Read from current position -TBuf8<4> readBuf2; -myFile.Read(readBuf2); // readBuf2 is now "data" - - -
Notes
    -

  • In all cases, the file -data is treated as binary and byte descriptors are used (TDes8, TDesC8). Thus, -file operations are not dependent on the Unicode/non-Unicode build variant.

    • -

  • There are several variants -of both Read() and Write(). The basic Read(TDes8& -aDes) and Write(const TDesC8& aDes) are supplemented -by variants allowing the descriptor length to be overridden, or the seek position -of the first byte to be specified, or asynchronous completion, or any combination.

    • -
+ + + + + +How +to read and write a fileThis topic describes how to reading transfer data from a file to +a descriptor, and writing transfers data from a descriptor to a file. +

Reading transfers data from a file to a descriptor, and writing transfers +data from a descriptor to a file.

+

Use RFile::Read() to read, and RFile::Write() to +write.

+// Open file1 +_LIT(KMyFile,"c:\\documents\\file1"); +RFile myFile; +User::LeaveIfError(myFile.Open(fs,KMyFile,EFileShareExclusive|EFileWrite +)); + +// Write to current file position: start of file +_LIT8(KWriteBuf,"write data"); +myFile.Write(KWriteBuf); + +// Read from position 0: start of file +TBuf8<6> readBuf1; +myFile.Read(0,readBuf1); // readBuf1 is now "write " + +// Read from current position +TBuf8<4> readBuf2; +myFile.Read(readBuf2); // readBuf2 is now "data" + + +
Notes
    +

  • In all cases, the file +data is treated as binary and byte descriptors are used (TDes8, TDesC8). Thus, +file operations are not dependent on the Unicode/non-Unicode build variant.

    • +

  • There are several variants +of both Read() and Write(). The basic Read(TDes8& +aDes) and Write(const TDesC8& aDes) are supplemented +by variants allowing the descriptor length to be overridden, or the seek position +of the first byte to be specified, or asynchronous completion, or any combination.

    • +
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