Support pdf files larger than 2Gig.

If FZ_LARGEFILE is defined when building, MuPDF uses 64bit offsets
for files; this allows us to open streams larger than 2Gig.

The downsides to this are that:

 * The xref entries are larger.

 * All PDF ints are held as 64bit things rather than 32bit things
   (to cope with /Prev entries, hint stream offsets etc).

 * All file positions are stored as 64bits rather than 32.

The implementation works by detecting FZ_LARGEFILE. Some #ifdeffery
in fitz/system.h sets fz_off_t to either int or int64_t as appropriate,
and sets defines for fz_fopen, fz_fseek, fz_ftell etc as required.

These call the fseeko64 etc functions on linux (and so define
_LARGEFILE64_SOURCE) and the explicit 64bit functions on windows.

1 files changed, 2 insertions, 2 deletions

diff --git a/source/fitz/filter-basic.c b/source/fitz/filter-basic.c
index eb9e838e..20bb6619 100644
--- a/source/fitz/filter-basic.c
+++ b/source/fitz/filter-basic.c
@@ -14,7 +14,7 @@ struct null_filter
 {
 	fz_stream *chain;
 	int remain;
-	int offset;
+	fz_off_t offset;
 	unsigned char buffer[4096];
 };
 
@@ -54,7 +54,7 @@ close_null(fz_context *ctx, void *state_)
 }
 
 fz_stream *
-fz_open_null(fz_context *ctx, fz_stream *chain, int len, int offset)
+fz_open_null(fz_context *ctx, fz_stream *chain, int len, fz_off_t offset)
 {
 	struct null_filter *state;