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| author | Robin Watts <robin.watts@artifex.com> | 2015-05-14 17:12:42 +0100 |
|---|---|---|
| committer | Robin Watts <robin.watts@artifex.com> | 2015-05-15 13:06:56 +0100 |
| commit | 7d5ff30c37c9e5b271fdb2b8cb3219068048322e (patch) | |
| tree | 5f60d1d03235f2cff161207e00515c5a4a69ef73 /source/fitz/stream-open.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-open.c')
| -rw-r--r-- | source/fitz/stream-open.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/source/fitz/stream-open.c b/source/fitz/stream-open.c index 10d94a09..4a3b69ad 100644 --- a/source/fitz/stream-open.c +++ b/source/fitz/stream-open.c @@ -81,13 +81,13 @@ static int next_file(fz_context *ctx, fz_stream *stm, int n) return *stm->rp++; } -static void seek_file(fz_context *ctx, fz_stream *stm, int offset, int whence) +static void seek_file(fz_context *ctx, fz_stream *stm, fz_off_t offset, int whence) { fz_file_stream *state = stm->state; - int n = fseek(state->file, offset, whence); + fz_off_t n = fz_fseek(state->file, offset, whence); if (n < 0) fz_throw(ctx, FZ_ERROR_GENERIC, "cannot seek: %s", strerror(errno)); - stm->pos = ftell(state->file); + stm->pos = fz_ftell(state->file); stm->rp = state->buffer; stm->wp = state->buffer; } @@ -139,7 +139,7 @@ fz_open_file(fz_context *ctx, const char *name) f = _wfopen(wname, L"rb"); fz_free(ctx, wname); #else - f = fopen(name, "rb"); + f = fz_fopen(name, "rb"); #endif if (f == NULL) fz_throw(ctx, FZ_ERROR_GENERIC, "cannot open %s", name); @@ -164,9 +164,9 @@ static int next_buffer(fz_context *ctx, fz_stream *stm, int max) return EOF; } -static void seek_buffer(fz_context *ctx, fz_stream *stm, int offset, int whence) +static void seek_buffer(fz_context *ctx, fz_stream *stm, fz_off_t offset, int whence) { - int pos = stm->pos - (stm->wp - stm->rp); + fz_off_t pos = stm->pos - (stm->wp - stm->rp); /* Convert to absolute pos */ if (whence == 1) { @@ -181,7 +181,7 @@ static void seek_buffer(fz_context *ctx, fz_stream *stm, int offset, int whence) offset = 0; if (offset > stm->pos) offset = stm->pos; - stm->rp += offset - pos; + stm->rp += (int)(offset - pos); } static void close_buffer(fz_context *ctx, void *state_) |