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Through out the code base there are numerous places where variables
are declared using a signed integer type when interacting with the
string classes, since they assume that FX_STRSIZE is 'int'. As part of
changing the underling type of FX_STRSIZE to be unsigned, these
locations are being changed to use FX_STRSIZE. This is necessary as
part of converting the type, but has been broken off into a separate CL,
since it should be low risk.
Some related cleanups that are low risk are included as part of
this CL.
BUG=pdfium:828
Change-Id: Ifaae54ad195ccde0fe8672f71271d29a6ebd65fd
Reviewed-on: https://pdfium-review.googlesource.com/12210
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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BUG=chromium:752501
Change-Id: Ie9943cd80a4afa73ad9393c8bcd2aa2656a9d932
Reviewed-on: https://pdfium-review.googlesource.com/12290
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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The current limit of 2000 is still causing occassional ASAN issues,
reducing to 1250.
BUG=chromium:757711
Change-Id: Idb07f97b01230afabcceaa23b29495432193ec64
Reviewed-on: https://pdfium-review.googlesource.com/11750
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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The Find and ReverseFind methods for WideString, WideStringC,
ByteString, and ByteStringC have been converted from returning a raw
FX_STRSIZE, to returning Optional<FX_STRSIZE>, so that success/failure
can be indicated without using FX_STRNPOS.
This allows for removing FX_STRNPOS and by association makes the
conversion of FX_STRSIZE to size_t easier, since it forces checking
the return value of Find to be explictly done as well as taking the
error value out of the range of FX_STRSIZE.
New Contains methods have been added for cases where the success or
failure is all the call site to Find cared about, and the actual
position was ignored.
BUG=pdfium:828
Change-Id: Id827e508c8660affa68cc08a13d96121369364b7
Reviewed-on: https://pdfium-review.googlesource.com/11350
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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Due to the recursive nature of the FormCalc parser, deeply nested
expressions can lead to memory being exhausted. This check is being
added to have the parser exit early instead of running out of
memory. This should reduce the number of false positives about
addressing issues being found by fuzzers.
BUG=chromium:752433
Change-Id: I511ecfb07e32073555e1fd1658f3b8b47f1a5a91
Reviewed-on: https://pdfium-review.googlesource.com/11170
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This method duplicates the behaviour of the const [] operator and
doesn't offer any additional safety. Folding them into one
implementation.
SetAt is retained, since implementing the non-const [] operator to
replace SetAt has potential performance concerns. Specifically many
non-obvious cases of reading an element using [] will cause a realloc
& copy.
BUG=pdfium:860
Change-Id: I3ef5e5e5a15376f040256b646eb0d90636e24b67
Reviewed-on: https://pdfium-review.googlesource.com/10870
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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Specifically the index parameter passed in to GetAt(), SetAt() and
operator[] are now being tested to be in bounds.
BUG=chromium:752480, pdfium:828
Change-Id: I9e94d58c98a8eaaaae53cd0e3ffe2123ea17d8c4
Reviewed-on: https://pdfium-review.googlesource.com/10651
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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Currently Find() and other methods that return a FX_STRSIZE return -1
to indicate error/failure. This means that there is a lot of magic
numbers and magic checks floating around. The standard library for
similar operations uses a npos constant. This CL implements
FX_STRNPOS, and replaces usages of magic number checking. It also does
some type cleanup along the way where it was obvious that FX_STRSIZE
should be being used.
Removing the magic numbers should make eventually changing FX_STRSIZE
to be unsigned easier in the future.
BUG=pdfium:828
Change-Id: I67e481e44cf2f75a1698afa8fbee4f375a74c490
Reviewed-on: https://pdfium-review.googlesource.com/9651
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This change also removes some variable shadowing that was going on
here.
BUG=chromium:750013
Change-Id: I7314166af3ecd55ea5e1105afbe171443b1b22ae
Reviewed-on: https://pdfium-review.googlesource.com/9630
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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The various string/byte classes support Mid(), Left(), and Right() for
extracting substrings. Mid() can handle all possible cases, but Left()
and Right() are useful for common cases and more explicit about what
is going on.
Calls like Mid(offset, length - offset) can be converted to
Right(length - offset). Calls like Mid(0, length) can be converted to
Left(length).
If the substring being extracted does not extend all the way to one of
the edges of the string, then Mid() still needs to be used.
BUG=pdfium:828
Change-Id: I2ec46ad3d71aac0f7b513e103c69cbe8c854cf62
Reviewed-on: https://pdfium-review.googlesource.com/9510
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This support is being removed from CFX_ByteString, CFX_ByteStringC,
CFX_WideString, and CFX_WideStringC. This standardizes all of these
classes to only have one Mid method that takes in 2 params, offset and
count. Count now must be positive. The old behaviour of calculating
the length for the user if -1 is passed in for the count has been
removed. This work is in preperation for converting these classes to
not accept negative lengths anywhere and thus make the underlying size
type unsigned.
BUG=pdfium:828
Change-Id: I5f15e7b7b00b264231817f143e2da88ee6f69e7b
Reviewed-on: https://pdfium-review.googlesource.com/9430
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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Minor nit I had with this code and want to fix.
Bug:
Change-Id: I2494667d580bf982a4359153123d9e8afb75e349
Reviewed-on: https://pdfium-review.googlesource.com/9370
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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Bug: pdfium:731
Change-Id: I3b7e4e88d44afcb8590ce4b7e7de7c0eccdc623a
Reviewed-on: https://pdfium-review.googlesource.com/7350
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
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0 is not actually in the spec for characters and was only included due
quirks in how the lexing code was written. Due to changes in the
lexer, it is no longer needed and a potential source of errors.
Bug:
Change-Id: I6fbba027e40aaa286ed4c89a6c569d26e3d4cd8b
Reviewed-on: https://pdfium-review.googlesource.com/9350
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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Removed 'case 0xf00:' to either be the character being checked or
moved to a IsWhitespaceCharacter() check.
BUG=pdfium:815
Change-Id: I34727a00f6d54ecf8de2f9e4eb785b3c10b6c521
Reviewed-on: https://pdfium-review.googlesource.com/9310
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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This CL rewrites how FMLexer returns errors, instead of having a flag
that gets flipped and needs to be checked, it now returns nullptr for
NextToken() when an error occurs. The Lexer's behaviour has also been
changed to only return nullptr once an error has occurred, instead of
advancing the lexing on further calls.
FMParse now checks the returned value from the lexer instead of
testing the error flag on the parser object. For any operation that
might cause the error state of the parser to change, i.e. consuming a
token, an error check has been added. In the event this check fails
the related function returns nullptr. This will cause the parse to
short circuit and exit.
BUG=pdfium:814
Change-Id: I669012c4732c18d13009be7cd7bf1ae682950904
Reviewed-on: https://pdfium-review.googlesource.com/8950
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: (OOO Jul 28 - Aug 8) dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This is to aid with debugging, since the getting
things like the type is a pain due to it being a enum.
Bug:
Change-Id: I89bae7103b476d7fd09ba78699367a1a413ee700
Reviewed-on: https://pdfium-review.googlesource.com/9190
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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XFA_FM_KeywordToString is no longer used, and there are no plans to
use it in the future, so should be removed.
Bug:
Change-Id: I44652a40f6396b25262f840c42036fb00a14aca1
Reviewed-on: https://pdfium-review.googlesource.com/9210
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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This CL removes the pattern used in the lexer of passing the lexing
member variables around as args to methods. Instead it uses the fact
that they are member variables in the methods.
This CL also includes renaming of variable and function names to
remove unneeded details or make them more precise.
BUG=pdfium:814
Change-Id: Id4c592338db9ff462835314252d39ab3b4b2b2ab
Reviewed-on: https://pdfium-review.googlesource.com/8850
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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The existing methods had either very bare passive or in some cases
misleading names, so this CL changes them active names that describe
what they do. This also extracts the IsKeyword method into a helper
function since it is actually static.
BUG=pdfium:816
Change-Id: I47a113bc9ea8d88a77822a4441266ec56e6b4cbc
Reviewed-on: https://pdfium-review.googlesource.com/8730
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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Throughout the lexer there is use of a pattern where a character is
extracted from the location currently being pointed at in the input
and tests are done on this value. This is uneeded, since normally the
pointer isn't being modified while the character is stored, so the
pointer can be dereferenced directly.
This CL also cleans ups the implementation of string extraction from
the input to be easier to read, since it did depend on the character
being extracted to work. The IsFooCharacter methods are also
changed to take in a character instead of a pointer, since they are
only testing the character value not the pointer.
BUG=pdfium:814
Change-Id: I8eda01e0af59ff1f6c6e97d6fb504856c7a08a24
Reviewed-on: https://pdfium-review.googlesource.com/8690
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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There currently exists a weird split where some files exist in xfa/fxfa
and some files exist in xfa/fxfa/app. This CL removes the app/ folder
and moves all files up to the parent directory.
Change-Id: I00c87851a1ebc5a7a636eb9a17b58ba3f1708a84
Reviewed-on: https://pdfium-review.googlesource.com/8810
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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Since there is no guarantee of termination if the StringC was
extracted from a snippet of another string. Make it more obvious
that things like
strlen(str.unterminated_c_str())
might be a bad idea.
Change-Id: I7832248ed89ebbddf5c0bcd402aac7d40ec2adc2
Reviewed-on: https://pdfium-review.googlesource.com/8170
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
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This makes the lexer stricter on valid characters for identifiers, and
conform to the grammar in the FormCalc spec. This should remove a
class of inputs that ClusterFuzz is attempting that are breaking later
stages of the transpile.
BUG: chromium:736234, pdfium:783, pdfium:784
Change-Id: I3987d6778a82b71d768fa751035993c0af2577ee
Reviewed-on: https://pdfium-review.googlesource.com/8010
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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Change-Id: Ic81df89078241c75ae2da6309b22022ba225100f
Reviewed-on: https://pdfium-review.googlesource.com/7370
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
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Cleanup of code I changed earlier last week, to match the style
recommended in later reviews and make it more readable.
BUG=pdfium:786
Change-Id: I2ff8b980a229718e389ad1a8063bd5059aedb66c
Reviewed-on: https://pdfium-review.googlesource.com/7212
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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BUG=pdfium:786
Change-Id: I7a852566cdde301ee896c12d9d29043047c31ad4
Reviewed-on: https://pdfium-review.googlesource.com/7211
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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BUG=pdfium:786
Change-Id: I0779dccb6db0e6ea3933279914153ef7961d9a5b
Reviewed-on: https://pdfium-review.googlesource.com/7152
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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BUG=pdfium:786
Change-Id: I84f4012b5225f81df604fcc6e0836ac5d19f1414
Reviewed-on: https://pdfium-review.googlesource.com/7153
Reviewed-by: Nicolás Peña <npm@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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Removing hand rolled hash table and binrary search.
BUG=pdfium:786
Change-Id: Iac18f02c9f560f484b974762474dbb51597d2353
Reviewed-on: https://pdfium-review.googlesource.com/7092
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
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Remove handling of arbitrary function calls, and only allow supported
function calls. Issues with the lexer being overly permissive led to
large blobs of javascript being dropped into the output. Specifically
driver code was assuming that anything marked as a function would just
be an identifier that could be inserted into the javascript, but the
lexer marks things like ()()() as a function, which would lead to the
following JS being inserted as an identifier.
This change is intended to be a patch for the specific issue that was
being seen from the fuzzer test, and further work will be needed to
make the lexer more strict.
BUG=724913
TEST=Ran fuzzer test case. Ran unittests,embeddertests,corpustests.
Change-Id: Ib7d9239bf6fece853bea0f4915ee4ad72d3cd290
Reviewed-on: https://pdfium-review.googlesource.com/7032
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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The new embedder test shows Oneof() works, whereas the corpus test does
not. It turns out the corpus test was bad, and trying to fix it exposed
a different bug. So roll DEPS for the testing corpus anyway to get
improved tests, but keep the suppression for now.
BUG=pdfium:781
Change-Id: I3cc6b9a414384c917f205eff064c5dd2175d09fe
Reviewed-on: https://pdfium-review.googlesource.com/6973
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
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PDFium's vswprintf() is based on the win32 version to be consistent
across platforms. On Windows, %s has different meanings depending on
whether the printf() variant is wide or not.
BUG=chromium:732533
Change-Id: I7437ecd253da1234728c1e0897f02b7f907aada8
Reviewed-on: https://pdfium-review.googlesource.com/6550
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: dsinclair <dsinclair@chromium.org>
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Change-Id: I3fe0460f3a4cfd7d48ccfc79d0256fc83d7fbac8
Reviewed-on: https://pdfium-review.googlesource.com/6235
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
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CXFA_FM2JSContext and CXFA_Object both subclass CFXJSE_HostObject.
When a CFXJSE_HostObject is obtained from an opaque pointer inside
a V8 object internal slot, there is no way to distinguish one from
the other.
Bug: 728158
Change-Id: Iabc648e8b7226e2819d8795227442c3f6c61a793
Reviewed-on: https://pdfium-review.googlesource.com/6211
Reviewed-by: Lei Zhang <thestig@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>
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This CL splits the remaining files in xfa/fxfa/app into individual files
named after the classes.
Change-Id: I84bd8938937641bb6897614ed15558a2682f456c
Reviewed-on: https://pdfium-review.googlesource.com/6010
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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This Cl fixes the return type of the Round method to return a double instead
of a string.
Change-Id: I740e375bdedfe22cb9f81d4beeaa079eac64b1bd
Reviewed-on: https://pdfium-review.googlesource.com/5896
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
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This CL updates the return type of the remaining boolean tests to be Integer
and enables the tests.
Change-Id: Ie2856ad31d17ffb496f33e6969912d0aae9678c5
Reviewed-on: https://pdfium-review.googlesource.com/5895
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This Cl fixes the Exists test of FM2JSContext to handle the return type of
Integer instead of Boolean.
Change-Id: I51c43e22eff5330de5ab5e63a925006af483f0ab
Reviewed-on: https://pdfium-review.googlesource.com/5894
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This Cl enables the Choose tests for FM2JSContext. The Choose tests always
return a String.
Change-Id: I29b3ce4ed38f94886c6036f3766182fecb6e787b
Reviewed-on: https://pdfium-review.googlesource.com/5893
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This CL enables most of the FM2JSContext boolean tests. The return type is
updated to Integer from Boolean.
Change-Id: Ie3f665bd23a86e843cadb2ae8963767466bd1714
Reviewed-on: https://pdfium-review.googlesource.com/5892
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This CL adds tests for the FormCalc methods that don't require passing in a
formcalc object reference.
Change-Id: Ica6f15704cce525d38d25a27d1628089d2fc5a5a
Reviewed-on: https://pdfium-review.googlesource.com/5691
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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Change-Id: I88466943171f19259f84add69679741d44c8e123
Reviewed-on: https://pdfium-review.googlesource.com/5551
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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Change interform to avoid temp StringC with dangling ptr.
Change-Id: I8d8659973bcdf2cdbcaa6efa6012e4acce5f1604
Reviewed-on: https://pdfium-review.googlesource.com/5571
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
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This Cl adds the basis of the test framework to execute the javascript
produced by CXFA_FM2JSContext and verify the results are correct.
Change-Id: Ie46625b7e27ca0808e9cc41fdc00b7c0a212837d
Reviewed-on: https://pdfium-review.googlesource.com/5651
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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This Cl removes the CXFA_FMErrorInfo class. The message was never output, just
used as a flag to determine if there was an error. The class has been replaced
with a boolean.
Change-Id: I1cde99ce6957f5f8c6be0755a198d80ec8378b3a
Reviewed-on: https://pdfium-review.googlesource.com/5653
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This Cl shortens the prefix applied in JavaScript to reduce the size of
the generated JavaScript string.
Change-Id: Ica5d02cc89b17140ba42deae72484cd159f8e3e5
Reviewed-on: https://pdfium-review.googlesource.com/5590
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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This CL adds the beginning of unittests for the CXFA_Parse code.
Change-Id: I06e556f1a35405bc683c536d390071917ee330a6
Reviewed-on: https://pdfium-review.googlesource.com/5556
Reviewed-by: Nicolás Peña <npm@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>
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Most files match the contents. The expression files are named to match
their base type even though they contain all the expression
subclasses.
Change-Id: I3b7705c7b206a9fa1afae8b677f765e8b788e84d
Reviewed-on: https://pdfium-review.googlesource.com/5492
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Nicolás Peña <npm@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>
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