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author | Robin Watts <robin.watts@artifex.com> | 2015-05-14 17:12:42 +0100 |
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committer | Robin Watts <robin.watts@artifex.com> | 2015-05-15 13:06:56 +0100 |
commit | 7d5ff30c37c9e5b271fdb2b8cb3219068048322e (patch) | |
tree | 5f60d1d03235f2cff161207e00515c5a4a69ef73 /source/fitz/stream-read.c | |
parent | 250e8a11e1debfbd9c4fc84ad895bf923aac135e (diff) | |
download | mupdf-7d5ff30c37c9e5b271fdb2b8cb3219068048322e.tar.xz |
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.
Diffstat (limited to 'source/fitz/stream-read.c')
-rw-r--r-- | source/fitz/stream-read.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/source/fitz/stream-read.c b/source/fitz/stream-read.c index 75261ea5..e555314d 100644 --- a/source/fitz/stream-read.c +++ b/source/fitz/stream-read.c @@ -114,21 +114,21 @@ fz_read_line(fz_context *ctx, fz_stream *stm, char *mem, int n) *s = '\0'; } -int +fz_off_t fz_tell(fz_context *ctx, fz_stream *stm) { return stm->pos - (stm->wp - stm->rp); } void -fz_seek(fz_context *ctx, fz_stream *stm, int offset, int whence) +fz_seek(fz_context *ctx, fz_stream *stm, fz_off_t offset, int whence) { stm->avail = 0; /* Reset bit reading */ if (stm->seek) { if (whence == 1) { - offset = fz_tell(ctx, stm) + offset; + offset += fz_tell(ctx, stm); whence = 0; } stm->seek(ctx, stm, offset, whence); |