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2017-08-17Fix some issues with individual image mask renderingrbpotter
Re-enable individual image mask rendering to improve spool sizes, with bug fixes and improvements: - Fix bug with missing images by ensuring all masks are recorded - Fix printing to landscape paper sizes - Improve spool sizes by processing the location of the masks in the progressive renderer when rendering to the printer instead of needlessly fully rendering them (they will be rendered as bitmaps anyway). Bug: chromium:753700 Change-Id: I86bdcce9f10855274c56ba2ddae2c2522b36426d Reviewed-on: https://pdfium-review.googlesource.com/11115 Commit-Queue: Rebekah Potter <rbpotter@chromium.org> Reviewed-by: Lei Zhang <thestig@chromium.org>
2017-08-16Fix another unguarded string element accessRyan Harrison
BUG=chromium:754969 Change-Id: I4f92d301499c658c57393fde01f1252ea84e59a8 Reviewed-on: https://pdfium-review.googlesource.com/11250 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-16Fix potential OOM / integer overflow in CPDF_Parser.Lei Zhang
The count passed into ParseAndAppendCrossRefSubsectionData() may be invalid. BUG=chromium:752796 Change-Id: Ic7bbfd16761d1df0855e6c77e4abc68823b12395 Reviewed-on: https://pdfium-review.googlesource.com/11130 Reviewed-by: Art Snake <art-snake@yandex-team.ru> Commit-Queue: Lei Zhang <thestig@chromium.org>
2017-08-16API and test for retrieving metadata from image objectsJane Liu
Added FPDFImageObj_GetImageMetadata() for retriving the image metadata of image objects, including its dimension, DPI, bits per pixel, and colorspace. * Added a corresponding embedder test. Bug=pdfium:677 Change-Id: I4229334d1ac2125b21a46e2e44ea937ea2e94b51 Reviewed-on: https://pdfium-review.googlesource.com/10110 Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Jane Liu <janeliulwq@google.com>
2017-08-15Change a bunch of methods to take a const CFX_Matrix& param.chromium/3187Lei Zhang
Simplify some code along the way. Change-Id: I0022c8a82188192c63b9ac0bc87e9b9dbf983040 Reviewed-on: https://pdfium-review.googlesource.com/10852 Reviewed-by: dsinclair <dsinclair@chromium.org> Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2017-08-15Remove CFX_ByteTextBuf.Henrique Nakashima
Bug: pdfium:731 Change-Id: I00d2097bca369aa4d1743716c4b2615e37a8444d Reviewed-on: https://pdfium-review.googlesource.com/10910 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-15Add missing length check before getting element from stringRyan Harrison
BUG=chromium:754993 Change-Id: I9444ef83fb62784fef3bf8d294b2ab88b6574b5a Reviewed-on: https://pdfium-review.googlesource.com/11070 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-15Make GetChar & Clone const for IFX_CharIterRyan Harrison
BUG=pdfium:864 Change-Id: Iab03e1977c859f150452825650afed3520024cca Reviewed-on: https://pdfium-review.googlesource.com/11030 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-15Remove useless code.Artem Strygin
Change-Id: I2c5ea6a0c4487c0200229f4709214bda1f287de8 Reviewed-on: https://pdfium-review.googlesource.com/10990 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@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>
2017-08-15Remove CFDE_RenderDeviceDan Sinclair
This CL removes CFDE_RenderDevice. For most of the proxy'd calls we call the CFX_RenderDevice directly now. To set the clip rect an overload was added to accept a CFX_RectF and handle the casting to FX_RECT. The one needed method, DrawString, is move to a static on CFDE_TextOut. Change-Id: I95ea7e1fa1fd4702074b797c06423c9c9cb51db9 Reviewed-on: https://pdfium-review.googlesource.com/10951 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-14Refactoring of CPDF_DataAvail::GetObject.Artem Strygin
Use ReadValidator to request exact data on object read. Change-Id: I1d1863097fa2b037e1bb2e4e89b93d26c5d8e066 Reviewed-on: https://pdfium-review.googlesource.com/10510 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-14Add CPDF_ObjectWalker.Artem Strygin
It is allow us to walk on all non-null sub-objects in an object in depth, include itself, Change-Id: Ia23051073984411668112422b47cf7a4460aa078 Reviewed-on: https://pdfium-review.googlesource.com/8910 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-14Refactoring of CPDF_DataAvail::AreObjectsAvailable.chromium/3186Artem Strygin
Use ReadValidator to request exact data on object read. Change-Id: Ie6c3f452e119fa3514e77f1824473c33bb6b855a Reviewed-on: https://pdfium-review.googlesource.com/10491 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: dsinclair <dsinclair@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>
2017-08-10Move graphic state operations outside BT/ET operationsRyan Wiley
Bug: pdfium:857 Change-Id: Ic1fb12459cad79b45466df10a24fe6743377ae14 Reviewed-on: https://pdfium-review.googlesource.com/10612 Reviewed-by: Nicolás Peña <npm@chromium.org> Commit-Queue: Nicolás Peña <npm@chromium.org>
2017-08-10Remove CFDE_PathDan Sinclair
This CL removes CFDE_Path. There is only one method, AddLine which is required, the rest can be removed. That method is moved to CFX_PathData which is what CFDE_Path is appending to anyway. Change-Id: If50af8cf856a9f7379791fe1999174db5fd13e38 Reviewed-on: https://pdfium-review.googlesource.com/10454 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-10LCMS: rename folderNicolas Pena
Change-Id: I5f240cb0779648dc5427fecb5561086e7c0fb16a Reviewed-on: https://pdfium-review.googlesource.com/10650 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Nicolás Peña <npm@chromium.org>
2017-08-10Rename CFX_UTF8Decoder::AppendChar to AppendCodePoint.Henrique Nakashima
Change-Id: Iec5523492eac3910f5ed105370e9092fd992b1b9 Reviewed-on: https://pdfium-review.googlesource.com/10471 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-10Make CFX_ByteString(ostringstream) const.Henrique Nakashima
Change-Id: I782379cc7f93b93ed34a5d0a39ee2f198c650465 Reviewed-on: https://pdfium-review.googlesource.com/10430 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-09Remove CFX_ByteTextBuf from CFX_UTF8EncoderHenrique Nakashima
Also making CFX_ByteString(ostringstream) const. Bug: pdfium:731 Change-Id: Iaee610248a5634e8731eaf05944c32d52c4e8015 Reviewed-on: https://pdfium-review.googlesource.com/10151 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-09Add a FPDF_GetFileVersion() test for a linearized document.Lei Zhang
Change the CPDFParserEmbeddertest.Feature_Linearized_Loading test case into FPDFViewEmbeddertest.LinearizedDocument, and add a call to FPDF_GetFileVersion(). Change-Id: I0272c1e71c6f61393838bd3db41b154c4f5620ba Reviewed-on: https://pdfium-review.googlesource.com/10450 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2017-08-09Remove useless code.Artem Strygin
The CPDF_Parser::IsVersionUpdated is not used anymore. Change-Id: I896c42daca3c5bed7b9d700eaea6ced686ab5acb Reviewed-on: https://pdfium-review.googlesource.com/10490 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-09Unify initialization of CPDF_Parser.Artem Strygin
Move syntax parser initialization in separate method. Change-Id: I701284b1fee26a474c24ca68948a3462cc68faec Reviewed-on: https://pdfium-review.googlesource.com/10291 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: Lei Zhang <thestig@chromium.org>
2017-08-09Unify of saving documents.chromium/3181Artem Strygin
In the original code the method of writing of objects depends on a much unpredictable factors: as: 1) Is there an updated version of the at least one object in the document. 2) The password is changed. 3) Was this object loaded earlier. 4) The Object is compressed and document have a password. With these factors it is difficult to predict what will be the final file. To reduce volatility use only one method that works in all cases mentioned. This method is parse then serialize. Change-Id: I3d7dcadd10abffbad68d1f993f2dd60b039ed989 Reviewed-on: https://pdfium-review.googlesource.com/9572 Commit-Queue: Art Snake <art-snake@yandex-team.ru> Reviewed-by: dsinclair <dsinclair@chromium.org>
2017-08-09Unify CPDF_Parser::ParseIndirectObjectAtXXX methods.Artem Strygin
Change-Id: I9ee1da4d0a9751dae8d595b610cf77c074c22cdc Reviewed-on: https://pdfium-review.googlesource.com/10350 Reviewed-by: dsinclair <dsinclair@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2017-08-09Move CSS data tables only used in one fileDan Sinclair
This CL moves the cfx_cssdatatable tables and methods which are only used in cfx_cssdeclaration to an anonymous namespace. Change-Id: Ib5dc71cc85c348e2ae7feaab8d6495fc2aa88642 Reviewed-on: https://pdfium-review.googlesource.com/9253 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-09Fold CFX_IsOnlyValue define into only usageDan Sinclair
Change-Id: I2cb20fd00436858f035f984fc104bae2c2d01057 Reviewed-on: https://pdfium-review.googlesource.com/9252 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: dsinclair <dsinclair@chromium.org>
2017-08-08Add validator into CPDF_SyntaxParser.Artem Strygin
Change-Id: I7fe8dcd8854e2f08b7b0ee53bde6c864108142ff Reviewed-on: https://pdfium-review.googlesource.com/9571 Reviewed-by: Lei Zhang <thestig@chromium.org>
2017-08-08Move CSS code to coreDan Sinclair
The xfa/fde/css code has no other links into xfa/. This CL moves the css code to core/fxcrt/css and sets to only build when pdf_enable_xfa is enabled. Change-Id: Iefd208e1f83a28b80b567c574e841e87bce310be Reviewed-on: https://pdfium-review.googlesource.com/9251 Commit-Queue: dsinclair <dsinclair@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-07Tidy fx_codec_jpx_opj.cppchromium/3180Tom Sepez
Single no-op callback. pdfium::clamp() where appropriate. Use post-increment where appropriate. Add helper functions for image type. Change-Id: I1584a1c90b46bd87f6ee983b78b6a2119212d0fb Reviewed-on: https://pdfium-review.googlesource.com/10270 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-07Convert static functions to anonymous namespaceTom Sepez
Mechanical change to bring into conformance with style guide. Change-Id: I80d06708ed5c40af7e797ea5dc6279a0b4f3cf6a Reviewed-on: https://pdfium-review.googlesource.com/10250 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-07Fix PartitionAlloc vs. opj_malloc mismatch in fx_codec_jpx_opj.cppTom Sepez
Apply patch suggestions from reporter. Move all FX_Alloc'd memory into unique_ptrs so that no bare FX_Alloc/Free_Free calls remain. Fix a realloc / opj_realloc mismatch. Remove unused functions color_apply_icc_profile() and color_apply_conversion(). Tidy along the way, add some missing statics, and fix a confusing (but not quite member shadowing) local name. Bug: 752829 Change-Id: Ibf2d108a857e3de39e752c2c553a31e002a07caf Reviewed-on: https://pdfium-review.googlesource.com/10230 Reviewed-by: Lei Zhang <thestig@chromium.org> Reviewed-by: Chris Palmer <palmer@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-04Remove CFX_ByteTextBuf from cpdfsdk_interform.cpp and others.chromium/3177Henrique Nakashima
New version of the CL that include fpdf_parser_utility.cpp where there is an overload for CFX_ByteTextBuf << CPDF_Object* used by CFDF_Document. Bug: pdfium:731 Change-Id: I54f4e9ee7e10e94388f6f6584f3999f43689e84c Reviewed-on: https://pdfium-review.googlesource.com/10170 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-04Enforce recent VC++ version (2015 or later).Tom Sepez
Remove ifdef'd code for versions we know will no longer work. Change-Id: I036c80168f846df1b98e9df4972f84655e8418fb Reviewed-on: https://pdfium-review.googlesource.com/10051 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-04Revert "Remove CFX_ByteTextBuf from cpdfsdk_interform.cpp and others."Henrique Nakashima
This reverts commit aea80dcc0abc0c310316fa502f91a359bc684758. Reason for revert: WriteBuf's behavior was altered Original change's description: > Remove CFX_ByteTextBuf from cpdfsdk_interform.cpp and others. > > Bug: pdfium:731 > Change-Id: I61d38ab3f2b0ac68b8479ade25bab50f3a73c27b > Reviewed-on: https://pdfium-review.googlesource.com/9770 > Reviewed-by: Tom Sepez <tsepez@chromium.org> > Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> TBR=tsepez@chromium.org,hnakashima@chromium.org,rharrison@chromium.org # Not skipping CQ checks because original CL landed > 1 day ago. Bug: pdfium:731 Change-Id: Ic66a2641c259173fb3792f7a4206e19ee4707fc9 Reviewed-on: https://pdfium-review.googlesource.com/10150 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-04Replace CFX_ByteTextBuf with ostringstream in fx_win32_gdipext.cppHenrique Nakashima
Bug: pdfium:731 Change-Id: I95d7c16e6c30e6675a17505359b5b7ae1dd5ff12 Reviewed-on: https://pdfium-review.googlesource.com/9950 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-03APIs and tests for retrieving raw/decoded data from image objectsJane Liu
Added FPDFImageObj_GetImageDataDecoded() for retrieving the uncompressed data of an image, and FPDFImageObj_GetImageDataRaw() for retrieving the raw data of an image. * Refactored out DecodeStreamMaybeCopyAndReturnLength(), which is used to decode both attachment data and image data. * Within DecodeStreamMaybeCopyAndReturnLength(), used a different decoder function which takes care of multiple filters if exist. As a result, CPDF_StreamParser::DecodeInlineStream() which was made static previously is now moved back into namespace. Bug=pdfium:677 Change-Id: I22a22c99acaca98ef8c15f88911f2646a2c854d5 Reviewed-on: https://pdfium-review.googlesource.com/9811 Commit-Queue: Jane Liu <janeliulwq@google.com> Reviewed-by: Lei Zhang <thestig@chromium.org>
2017-08-03APIs and tests for extracting bitmaps from image objectsJane Liu
Added FPDFImageObj_GetBitmap() that returns the bitmap of an image object, and a FPDFBitmap_GetFormat() that returns the format of a bitmap. * Fixed a small bitmap conversion bug in cfx_dibsource.cpp. * Enabled EmbedderTest::CompareBitmap() to support different formats of bitmaps. * Added an embedder test and a test PDF file with images of many different formats. Bug=pdfium:677 Change-Id: I6a72f9d969cf5f3577db9400ca33197c213622ed Reviewed-on: https://pdfium-review.googlesource.com/9690 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Jane Liu <janeliulwq@google.com>
2017-08-03kill some stray __native_client__ definesTom Sepez
There isn't any work to NaCl PDFium at the moment, and it would take a lot more than these few changes. Change-Id: I6c4bf5f38bbfb9cf4f5a5688128c7720c38a8ce4 Reviewed-on: https://pdfium-review.googlesource.com/10050 Reviewed-by: Lei Zhang <thestig@chromium.org> Commit-Queue: Tom Sepez <tsepez@chromium.org>
2017-08-03Remove CPDF_Array::Truncate().chromium/3176Lei Zhang
The only non-test caller is gone. Change-Id: I261bc6d97c3047b2935d7b663c1a5f7d15670714 Reviewed-on: https://pdfium-review.googlesource.com/10010 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
2017-08-03Do not truncate the filter array in PDF_DataDecode().Lei Zhang
It is not needed to fix https://crbug.com/552046 and it causes different bug. BUG=chromium:750993 Change-Id: I11627045bd3e73fb439884c3362ab1c26eb95fe3 Reviewed-on: https://pdfium-review.googlesource.com/9990 Reviewed-by: Oliver Chang <ochang@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Lei Zhang <thestig@chromium.org>
2017-08-03Avoid a redundant header offset check in CPDF_Parser.Lei Zhang
CPDF_Parser::StartLinearizedParse() calls StartParse(), but already knows the PDF header offset. Refactor StartParse() so it does not have to look for the header again. Change-Id: Id8cc39301ae72da868dafc53921622d5b28ce26e Reviewed-on: https://pdfium-review.googlesource.com/9830 Commit-Queue: Lei Zhang <thestig@chromium.org> Reviewed-by: Art Snake <art-snake@yandex-team.ru>
2017-08-02Replace CFX_ByteTextBuf with ostringstream in cfx_psrenderer.cpp.Henrique Nakashima
Bug: pdfium:731 Change-Id: Iac887a8d3485b5511ec7f3d809efeb8af6ea9ce7 Reviewed-on: https://pdfium-review.googlesource.com/9930 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-02Replace CFX_ByteTextBuf from cpdf_security_handler.cpp with std::vectorHenrique Nakashima
Bug: pdfium:731 Change-Id: I63532e06aa2c135f34a6adda24ae1cfbc5922ac9 Reviewed-on: https://pdfium-review.googlesource.com/9871 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Henrique Nakashima <hnakashima@chromium.org>
2017-08-02Remove unused FromUnicode methodRyan Harrison
A helper method for FromUnicode existed that converted wchar_t* to CFX_WideString before calling the remaining FromUnicode. This method is not used in the code base, so it has been removed. This simplifies converting FX_STRSIZE to be unsigned, since one of parameters to this method was of type FX_STRSIZE. BUG=pdfium:828 Change-Id: I3da677b84ac3b82ba48497e26d2ac80dd14302e6 Reviewed-on: https://pdfium-review.googlesource.com/9910 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-02Unify parsing of cross refs v4Artem Strygin
Change-Id: I7e3d45263a0bae61fd86fd4c3710de7fc0b9347d Reviewed-on: https://pdfium-review.googlesource.com/9290 Reviewed-by: Wei Li <weili@chromium.org> Commit-Queue: Art Snake <art-snake@yandex-team.ru>
2017-08-02Remove parameter from GetIDRyan Harrison
All of the call sites for this method used the default value, so it has been removed. This simplifies converting FX_STRSIZE to be unsigned, since the removed parameter was of this type. BUG=pdfium:828 Change-Id: I369285aed561731ab34ec6d30de0d21fb3431492 Reviewed-on: https://pdfium-review.googlesource.com/9891 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-02Remove support for out of bounds params in DeleteRyan Harrison
The existing implementation of Delete on the string classes handles some cases where the range being deleted is out of bounds by clipping it to the valid range. This behaviour can lead to programming problems in the calling code being masked by the fact the Delete method still does something. The new version of these methods does an early return if the parameters are invalid. This change also effectively removes support for negative string sizes from the Delete method, so converting FX_STRSIZE to be unsigned will be easier. BUG=pdfium:828 Change-Id: Idbb4a62f70a75eba06e7809e011b25da2d7404c4 Reviewed-on: https://pdfium-review.googlesource.com/9890 Reviewed-by: Tom Sepez <tsepez@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
2017-08-02Rewrite how string Insert() methods handle out of bound indicesRyan Harrison
The existing behaviour was to clamp the provided index to the valid bounds. This would lead to programming errors being hidden, since inserting would still do something even if the index calculation was wrong. The behaviour of these methods has been changed to instead early return when this occurs, returning the old length value. The caller can check if the call to Insert actually did anything by comparing the returned value to the length before calling insert. All of the existing calls to Insert have been tested by running all of the tests with asserts in the Insert method to check the index is in bounds. Additionally the call sites have been manually inspected. The majority of them are of the form Insert(0, foo) and the rest tend to be in a loop advancing from 0 to length. Convenience methods InsertAtFront/InsertAtBack have been added to handle calling Insert when the intent is for the character to be added to the beginning or end of the string. Existing call sites to Insert that do this have been converted. This work was originally being performed to check if there would be any issues in these methods with making FX_STRSIZE unsigned. BUG=pdfium:828 Change-Id: I60cee5ad45338aa8ed46569de7bcc78a76db18f7 Reviewed-on: https://pdfium-review.googlesource.com/9870 Commit-Queue: Ryan Harrison <rharrison@chromium.org> Reviewed-by: Tom Sepez <tsepez@chromium.org>
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