Fix sign and conversion warnings (major)

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.

1 files changed, 0 insertions, 2 deletions

diff --git a/NOTICE.md b/NOTICE.md
index b430a830..56eb455c 100644
--- a/NOTICE.md
+++ b/NOTICE.md
@@ -10,8 +10,6 @@ Versions of qpdf prior to version 7 were released under the terms of version 2.0
 
 The qpdf distribution includes a copy of [qtest](http://qtest.qbilt.org), which is released under the terms of the [version 2.0 of the Artistic license](https://opensource.org/licenses/Artistic-2.0), which can be found at https://opensource.org/licenses/Artistic-2.0.
 
-The standalone fuzz target runner (fuzz/standalone_fuzz_target_runner.cc) is copyright 2017 by Google and is also released under the Apache license, Version 2.0.
-
 The Rijndael encryption implementation used as the basis for AES encryption and decryption support comes from Philip J. Erdelsky's public domain implementation.  The files `libqpdf/rijndael.cc` and `libqpdf/qpdf/rijndael.h` remain in the public domain.  They were obtained from
 * http://www.efgh.com/software/rijndael.htm
 * http://www.efgh.com/software/rijndael.txt