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2018-02-21[formcalc] Cleanup if expression parsing.Dan Sinclair
This CL simplifies the if expression parsing. The elseif construct has been split into its own list of IfExpressions and no longer gets stuffed into the elseExpression. A loop was added into the output methods for the elseif expressions, which also means we can go from having: if () { } else { if () { } else { } } to if () { } else if () { } else { } Which is a bit nicer. Change-Id: I6edf75215500d6a32a8d7218d477b6960f03de51 Reviewed-on: https://pdfium-review.googlesource.com/27571 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-21[formcalc] Add elseif expression to parser testDan Sinclair
This extends the test case for slightly more coverage. Change-Id: I97613c2d8df416b37718ff747d218dd61ea02b37 Reviewed-on: https://pdfium-review.googlesource.com/27570 Commit-Queue: dsinclair <dsinclair@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-21[formcalc] Minor parser cleanupschromium/3352Dan Sinclair
This CL makes minor clarity cleanups to the formcalc parser and attempts to record the productions each method is processing. Change-Id: Ie12bb55647abf06251d1734fd05d08a964a32ebc Reviewed-on: https://pdfium-review.googlesource.com/27550 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-21[formcalc] Use default destructorsDan Sinclair
This CL switches the empty destructors in the FormCalc expressions to use default. Change-Id: I0a2ea520c89a96d29a2e2564572a7cf345f9f31a Reviewed-on: https://pdfium-review.googlesource.com/27510 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-21[formcalc] Remove the ParseBlockExpression methodDan Sinclair
In all the places we call ParseBlockExpression we really mean to parse an ExpressionList. Using ParseBlockExpression is confusing because the formcalc grammar has a BlockExpression defined which corresponds to our ParseDoExpression. This CL converts the use of ParseBlockExpression into calls to ParseExpressionList and then builds the BlockExpression class as needed. Change-Id: Iab9b6e783f01d35df905539d4dbc20ba18a7b0f9 Reviewed-on: https://pdfium-review.googlesource.com/27470 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-20[formcalc] Remove unused expression typeDan Sinclair
The expression type is no longer used, removed. Change-Id: I4c8b17ed1644560afd7fc87a7fb6c7d893b9de5c Reviewed-on: https://pdfium-review.googlesource.com/27450 Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-20[formcalc] Treat elseif and else the same during outputDan Sinclair
This CL combines the elseif and else output code for formcalc. This causes an extra set of {}'s to be output in the else case but should be syntactically the same. Change-Id: Ie30a51efadae2034d117f4bf280b9f7abc950a23 Reviewed-on: https://pdfium-review.googlesource.com/27431 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-20[formcalc] Do not convert if to an identifierDan Sinclair
The if token in formcalc is an internal keyword and can not be used as an identifier. The current if parsing code will turn if into an identifier if it fails to find the 'then' statement after the argument list. This should be a failed parse instead of coverting if to an identifier and resetting the lexer. Change-Id: Ieebf6a1aabc27482fcaeaf7a9bd4be40fc01e9ad Reviewed-on: https://pdfium-review.googlesource.com/27430 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-20[formcalc] Remove unused line parameterDan Sinclair
The recorded line number from the formcalc parse is never used. This Cl removes the parameter and removes the need to pass it through all of the constructors. Change-Id: Ice716cc4880dd17dc05bffcdce1dc1e4745108ea Reviewed-on: https://pdfium-review.googlesource.com/27412 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-20[formcalc] Split literal parsing to its own methodDan Sinclair
This Cl moves the code to create literals in the AST from ParsePrimaryExpression to ParseLiteral. Change-Id: I41ba20f28f1cb1d76d753c5baec790872acdf1da Reviewed-on: https://pdfium-review.googlesource.com/27411 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-20[formcalc] The if token is a keyword and should not be made an identifierDan Sinclair
This CL removes the code from PrimaryExpression which converts the if token into an indentifier. if() is a reserved keyword and can't be used as an indentifier according to the spec. Change-Id: I5644cdbe57ef62f4089b4704e1b8d196927e68a4 Reviewed-on: https://pdfium-review.googlesource.com/27370 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-20Tighten up assignment instructions in formcalc.Dan Sinclair
The assignment operator can not be chained. This Cl removes the while loop for assignments and changes it to an if(). We also can not have an assignment inside ()'s so remove that option. Bug: chromium:779349 Change-Id: I6934e18815f843ae8241023df6c03d8bbcd8168d Reviewed-on: https://pdfium-review.googlesource.com/27350 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-19Remove extraneous HasError checksdan sinclair
Duplicate checks, remove. Change-Id: Ic2f49651c50ed66328233817bc8cd24f7c9636c2 Reviewed-on: https://pdfium-review.googlesource.com/27330 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19FormCalc Assignment is not a SimpleExpressiondan sinclair
Currently the parser builds assignment statements as part of the SimpleExpression declaration. This isn't correct according to the grammar where AssignmentExpression and SimpleExpression are siblings. This CL moves the assignment calculation into the ExpExpression declaration to make it a sibling of the SimpleExpression. Change-Id: I6afac2379ab6783b84ee619863c8308ca0db454d Reviewed-on: https://pdfium-review.googlesource.com/27310 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Cleanup FormCalc inheritancedan sinclair
This CL cleans up the FormCalc inheritance. The binary and unary items all share ToJavaScript methods now. Change-Id: I7bf0978449395fa2eb90b954cf2118d7aa3f71c6 Reviewed-on: https://pdfium-review.googlesource.com/27290 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Remove base class ToJavaScript methods in FormCalcdan sinclair
This CL removes the Loop base class as it adds no functionality. Other base classes have had their ToJavaScript methods set as pure virtual and their constructors made protected. Change-Id: I5c77b8734d23c576dd52db7f72396ecdf2f7bd22 Reviewed-on: https://pdfium-review.googlesource.com/27270 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Cleanup JS generation in formcalc.dan sinclair
This CL cleans up some of the JS generation code to make it easier to see what JavaScript is begin created. Change-Id: I4265226cca0e4de400d05cc0fea3f8c76608115e Reviewed-on: https://pdfium-review.googlesource.com/27250 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Inline FormCalc method namesdan sinclair
This CL inlines the FormCalc method names instead of using a lookup array. Many of the names were only referenced once and this makes the code a lot simpler to read. Change-Id: Ib80f5bfa0097e4f1bad232e7de452f067db2a758 Reviewed-on: https://pdfium-review.googlesource.com/27211 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Inline some formcalc identifiersdan sinclair
This CL inlines the RUNTIMEFUNCTIONRETURNVALUE and EXCLAMATION_IN_IDENTIFIER defines to make the output code easier to read. Change-Id: I4a86da2aefc75ff137d9a7cff0351515b275f1b1 Reviewed-on: https://pdfium-review.googlesource.com/27230 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Merge FormCalc to JavaScript methodsdan sinclair
This CL merges the ToJavaScript and the ToImpliedJS methods in the FormCalc expressions. The type of return is passed as a paramter to ToJavaScript. Change-Id: Idff83677bc70b964d95aa6ff6b0e2c1bf8c603ea Reviewed-on: https://pdfium-review.googlesource.com/27210 Reviewed-by: Ryan Harrison <rharrison@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2018-02-19Simplify CXFA_FMToken creationdan sinclair
This CL converts the CXFA_FMToken usages into an object instead of a pointer. A copy constructor has been added. The line number was removed from the token and is retrieved from the lexer where needed. Change-Id: I94c632653e9bf1439d2ddf374a816ae0d10b5b67 Reviewed-on: https://pdfium-review.googlesource.com/27192 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-19Simplify formcalc token listdan sinclair
The keyword list in the formcalc lexer is only used to match identifiers. We don't need to store the non-identifier tokens in the list, so they're removed. The hash is removed and the list is compared by string instead. The token names have been moved to DEBUG so they won't be included in Release builds. Change-Id: Ieec00e9944960e559079083a605e3249c4128841 Reviewed-on: https://pdfium-review.googlesource.com/27190 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2018-02-15Add limit to number of formcalc expressionsDan Sinclair
Currently it's possible to create a formcalc script which creates a large number of expressions. This will eventually cause stack exhaustion as we try to allocate the needed expression objects. This CL limits the number of parsed expressions in the PostExpression section in order to keep from failing due to stack overflow. Bug: chromium:799721 Change-Id: I69fca35db7f75ef97aec21c22fc06d926dfe2df6 Reviewed-on: https://pdfium-review.googlesource.com/26870 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Ryan Harrison <rharrison@chromium.org>
2017-11-01Move some XFA JS code into fxjs/Dan Sinclair
This CL renames cxfa_scriptcontext to cfxjse_engine and cxfa_fm2jscontext to cfxjse_formcalc_context. From reading the code, the script context appears to handle the v8 setup and object code. The formcalc context code is related to handling the JS code generated from the transpiler. I, think, these new names make the intended usage clearer. They also move the code into fxjs/ to keep along side the rest of the JS code. Change-Id: I50619fbe48ca1f553a44cf0e0cb0210be8e45e4f Reviewed-on: https://pdfium-review.googlesource.com/17130 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-10-26Consistently apply JS size checkRyan Harrison
This CL makes the use of CXFA_IsTooBig consistent and universal across all of the ToJavascript and related methods. Previously this method was only applied in some calls. It is now being tested as a precondition and postcondition on every call and as a post condition for the entire translation process. There are some size checks within methods that potentially generate large amounts of JS that have been left in. BUG=chromium:752920 Change-Id: I1a8bfe21e0a17c2e47592fc6017060243674f1bc Reviewed-on: https://pdfium-review.googlesource.com/16812 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-10-25Fixing the prefix on IsTooBigRyan Harrison
Change-Id: I3be788e06790d8102fc3793a50a58c19f05f855d Reviewed-on: https://pdfium-review.googlesource.com/16790 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-10-25Add in depth check for ToJavascript and related methodsRyan Harrison
There exists a similar check for the parser, but it doesn't catch all cases of excessive memory usage, since a single parse step can generate multiple expressions that need to be converted or other cases where the parse depth doesn't match the emission depth later. Due to the expressions appearing in two different inheritence hierachies the depth information needs to be stored outside of the classes, thus the new depth class. Another way to handle this would be to change the method calls to take in a visitor object that tracks depth. This would require significant reworking of some of the code, so I am going to file a bug about doing that conversion as a cleanup. BUG=chromium:752495 Change-Id: Ica7c9b60ecf1e17530ea88b7bfb01582c63043be Reviewed-on: https://pdfium-review.googlesource.com/16752 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>
2017-09-27Remove FXSYS_strlen and FXSYS_wcslenchromium/3226Ryan Harrison
With the conversion of internal string sizes to size_t, these wrappers are no longer needed. Replacing them with strlen and wcslen respectively. BUG=pdfium:828 Change-Id: Ia087ca2ddaf688a57ec9bd9ddfb8533cbe41510d Reviewed-on: https://pdfium-review.googlesource.com/14890 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-09-27Remove FX_STRSIZE and replace with size_tRyan Harrison
BUG=pdfium:828 Change-Id: I5c40237433ebabaeabdb43aec9cdf783e41dfe16 Reviewed-on: https://pdfium-review.googlesource.com/13230 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-09-21Move CFX_UnownedPtr to UnownedPtrDan Sinclair
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>
2017-09-21Rename CFX_RetainPtr to RetainPtrDan Sinclair
This CL renames CFX_RetainPtr to RetainPtr and places in the fxcrt namespace. Bug: pdfium:898 Change-Id: I8798a9f79cb0840d3f037e8d04937cedd742914e Reviewed-on: https://pdfium-review.googlesource.com/14616 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-09-21Move CFX_AutoRestorer to fxcrt::AutoRestorerDan Sinclair
This CL renames CFX_AutoRestorer to just AutoRestorer and places in the fxcrt namespace. Bug: pdfium:898 Change-Id: Id9f36df94e95f3b2a55054bc198ca1bfd249ee3d Reviewed-on: https://pdfium-review.googlesource.com/14450 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-09-20Add in missed parse recursion depth checksRyan Harrison
Some of the calls in CXFA_FMParser on the prase recursion had been missed when adding in the parse depth limiting logic. The fuzzers found them. BUG=chromium:759295 Change-Id: Iad54beb356c4c555908797d4b58a42549c006e9e Reviewed-on: https://pdfium-review.googlesource.com/14510 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-09-18Convert string class namesRyan Harrison
Automated using git grep & sed. Replace StringC classes with StringView classes. Remove the CFX_ prefix and put string classes in fxcrt namespace. Change AsStringC() to AsStringView(). Rename tests from TEST(fxcrt, *String*Foo) to TEST(*String*, Foo). Couple of tests needed to have their names regularlized. BUG=pdfium:894 Change-Id: I7ca038685c8d803795f3ed02545124f7a224c83d Reviewed-on: https://pdfium-review.googlesource.com/14151 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-09-06Convert FX_STRSIZE int->size_tRyan Harrison
Change the underlying type for FX_STRSIZE to size_t from int. This will make the value unsigned and thus all values in the range of the type will be valid. This allows for the final remove of negative length strings, but also introduces a some casting and functional errors, since many parts of the code base assume that FX_STRSIZE is int or another signed type. This also CL fixes these errors. BUG=pdfium:828 Change-Id: I231dca59e96fc9330cbb099eecbdfc41fcf86f5b Reviewed-on: https://pdfium-review.googlesource.com/11830 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-09-06GUID cleanupDan Sinclair
This CL removes fx_guid and inlines into CXFA_FM2JSContext as needed. Change-Id: I08a1f03fd4be46730eee24ab73b8b5c0daf9cd7d Reviewed-on: https://pdfium-review.googlesource.com/13094 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-09-05Split fx_guid from fx_extensionDan Sinclair
This CL splits the GUID code out of fx_extension into an fx_guid.h file. Change-Id: I915538ff98601efb07595264eff6435729193177 Reviewed-on: https://pdfium-review.googlesource.com/13090 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-09-01Fix integer overflow in Buffer_itoa when passing INT_MIN.Henrique Nakashima
Bug: chromium:760034 Change-Id: Id0862749b1454e065de4de7d746a27e78ac58e30 Reviewed-on: https://pdfium-review.googlesource.com/12730 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-31Clean up of typing in lexer codeRyan Harrison
BUG=pdfium:813 Change-Id: I4c638857bf114327dbc0344cc6d231b897f0d001 Reviewed-on: https://pdfium-review.googlesource.com/11971 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-30Move CFX_WideTextBuf out of fx_basicDan Sinclair
This CL moves CFX_WideTextBuf to its own files and updates includes as needed. Change-Id: Ibe66ecf3e66f8f01dd8e9eaf6b467588be86ad4f Reviewed-on: https://pdfium-review.googlesource.com/12413 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-30Split auto restorer from fx_basicDan Sinclair
This CL moves CFX_AutoRestorer into its own file, separate from fx_basic.h. Change-Id: I415cb9207416bd4744b8ac8e2d7466852db53f0a Reviewed-on: https://pdfium-review.googlesource.com/12390 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-30Convert int* references to FX_STRSIZERyan Harrison
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>
2017-08-29Fix incorrectly guarded lexer advancement in FormCalc parserRyan Harrison
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>
2017-08-23Reduce FM2JS parser depth limit to avoid memory exhaustionRyan Harrison
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>
2017-08-23Convert string Find methods to return an OptionalRyan Harrison
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>
2017-08-16Add parse depth limit to FormCalc parserRyan Harrison
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>
2017-08-15Remove GetAt from string classesRyan Harrison
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>
2017-08-11Add checks of index operations on string classesRyan Harrison
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>
2017-08-01Replace raw value for constant error value in string operationsRyan Harrison
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>
2017-07-31Remove null derefence case caught by fuzzersRyan Harrison
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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