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2019-06-21Fix sign and conversion warnings (major)Jay Berkenbilt
This makes all integer type conversions that have potential data loss explicit with calls that do range checks and raise an exception. After this commit, qpdf builds with no warnings when -Wsign-conversion -Wconversion is used with gcc or clang or when -W3 -Wd4800 is used with MSVC. This significantly reduces the likelihood of potential crashes from bogus integer values. There are some parts of the code that take int when they should take size_t or an offset. Such places would make qpdf not support files with more than 2^31 of something that usually wouldn't be so large. In the event that such a file shows up and is valid, at least qpdf would raise an error in the right spot so the issue could be legitimately addressed rather than failing in some weird way because of a silent overflow condition.
2018-06-21Convert examples to use new page helper classesJay Berkenbilt
2018-02-19Switch from parseContentStream to parsePageContentsJay Berkenbilt
2017-08-29Replace all atoi calls with QUtil::string_to_intJay Berkenbilt
The latter catches underflow/overflow.
2013-10-18Security: replace operator[] with atJay Berkenbilt
For std::string and std::vector, replace operator[] with at. This was done using an automated process. See README.hardening for details.
2013-03-04Remove all old-style casts from C++ codeJay Berkenbilt
2013-03-04Replace many calls to sprintf with QUtil::hex_encodeJay Berkenbilt
Add QUtil::hex_encode to encode binary data has a hexadecimal string, and use it in place of sprintf where possible.
2013-01-22Add getTypeCode() and getTypeName()Jay Berkenbilt
Add virtual methods to QPDFObject, wrappers to QPDFObjectHandle, and implementations to all the QPDF_Object types.
2013-01-20Add QPDFObjectHandle::parseContentStream methodJay Berkenbilt
This method allows parsing of the PDF objects in a content stream or array of content streams.