Various export enhancements and fixes, including:

- A new SPExportFile class, providing an abstract interface to the handling and creation of export files.
- Enables the centralisation of all file/file handle creation logic as well as better support for handling situations where files fail to be created, including files that already exist at the export location.
- New SPExportFileHandleStatus constants to support the reporting of file handle creation.
- Update SPExporter to use the new file class instead of directly using an instance of SPFileHandle.
- Add the necessary logic to deal with files that already exist on disk, by providing the user with 3 options: cancel the export, ignore the files in question or overwrite them. We might want to enhance this to make new files sequential in name to prevent overwriting. Fixes issue #742.
- New SPExportFileUtilities category, which centralises all the logic relating to writing export type headers as well as dealing with problems occurred during file/file handle creation.
- Improve feedback given on the export progress sheet during export initialisation.
- Tidy up and improve comments.

1 files changed, 1 insertions, 1 deletions

diff --git a/Source/SPFileHandle.m b/Source/SPFileHandle.m
index b71873ed..7e856c2a 100644
--- a/Source/SPFileHandle.m
+++ b/Source/SPFileHandle.m
@@ -95,7 +95,7 @@
 			// Set gzip buffer
 			gzbuffer(gzfile, 131072);
 			
-			// Get the first 3 bytes from the file
+			// Get the first 4 bytes from the file
 			for (i = 0; (c = getc(wrappedFile)) != EOF && i < 4; bzbuf[i++] = c);
 			rewind(wrappedFile);