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Quoting the JBIG2 spec: "If B is a 0xFF byte, then B1 (the byte pointed
to by BP+1) is tested. If B1 exceeds 0x8F, then B1 must be one of the
marker codes. The marker code is interpreted as required, and the buffer
pointer remains pointed to the 0xFF prefix of the marker code which
terminates the arithmetically compressed data. 1-bits are then fed to
the decoder until the decoding is complete. This is shown by adding
0xFF00 to the C-register and setting the bit counter CT to 8."
Our implementation is the alternative (faster for software according to
the spec), where only CT is changed to 8.
Reaching this part of the code means we will never read from stream
again so we should be wrapping up the decoding. To ensure this, the
|m_Complete| attribute is set to true if we reach this code again,
which will result in bailing out next time DECODE is called.
Bug: 767156
Change-Id: I434d46bc7914713a065f0e4da079bbc9b5dd216c
Reviewed-on: https://pdfium-review.googlesource.com/16791
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Nicolás Peña Moreno <npm@chromium.org>
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This CL moves CFX_UnownedPtr to UnownedPtr and places in the fxcrt
namespace.
Bug: pdfium:898
Change-Id: I6d1fa463f365e5cb3aafa8c8a7a5f7eff62ed8e0
Reviewed-on: https://pdfium-review.googlesource.com/14620
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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Sed + minimal conversions to compile, including moving some
constructors into the .cpp file. Any that caused ASAN issues
during the tests were omitted rather than trying to resolve
the underlying issue.
Change-Id: I00a421f33b253eb4071ffd9af3f2922c7443b335
Reviewed-on: https://pdfium-review.googlesource.com/5891
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
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Currently when the BitStream runs out of bits it pretends that it
still has content and will continue to return the last byte over and
over again. This Cl updates the jbig decoder to detect that the bit
stream is complete and returns a decode error.
Bug: chromium:665056
Change-Id: I61ca75713e677a2c280e80374b8dcfd48bee67d8
Reviewed-on: https://pdfium-review.googlesource.com/3244
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This CL moves the core/src/ files up to core/ and fixes up the include guards,
includes and build files.
R=tsepez@chromium.org
Review URL: https://codereview.chromium.org/1800523005 .
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