jidctred.c


Log

Author Commit Date CI Message
DRC 8e9cef2e 2015-09-21T12:57:41 Fix various issues reported by the UB sanitizers Most of these involved left shifting a negative number, which is technically undefined (although every modern compiler I'm aware of will implement this by treating the signed integer as a 2's complement unsigned integer-- the LEFT_SHIFT() macro just makes this behavior explicit in order to shut up ubsan.) This also fixes a couple of non-issues in the entropy codecs, whereby the sanitizer reported an out-of-bounds index in the 4th argument of jpeg_make_d_derived_tbl(). In those cases, the index was actually out of bounds (caused by a malformed JPEG image), but jpeg_make_d_derived_tbl() would have caught the error and aborted prior to actually using the invalid address. Here again, the fix was to make our intentions explicit so as to shut up ubsan.
MIYASAKA Masaru a2e6a9dd 2006-02-04T00:00:00 IJG R6b with x86SIMD V1.02 Independent JPEG Group's JPEG software release 6b with x86 SIMD extension for IJG JPEG library version 1.02
Thomas G. Lane 489583f5 1996-02-07T00:00:00 The Independent JPEG Group's JPEG software v6a
Thomas G. Lane 36a4cccc 1994-09-24T00:00:00 The Independent JPEG Group's JPEG software v5
Guido Vollbeding 5996a25e 2009-06-27T00:00:00 The Independent JPEG Group's JPEG software v7
Thomas G. Lane 5ead57a3 1998-03-27T00:00:00 The Independent JPEG Group's JPEG software v6b
DRC b7753510 2014-05-11T09:36:25 Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons. They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code. In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.) git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/branches/1.3.x@1285 632fc199-4ca6-4c93-a231-07263d6284db
DRC e5eaf374 2014-05-09T18:00:32 Convert tabs to spaces in the libjpeg code and the SIMD code (TurboJPEG retains the use of tabs for historical reasons. They were annoying in the libjpeg code primarily because they were not consistently used and because they were used to format as well as indent the code. In the case of TurboJPEG, tabs are used just to indent the code, so even if the editor assumes a different tab width, the code will still be readable.) git-svn-id: svn+ssh://svn.code.sf.net/p/libjpeg-turbo/code/trunk@1278 632fc199-4ca6-4c93-a231-07263d6284db