[jira] Created: (QPID-2574) Mismatch uint32_t / size_t generates many compile warnings, esp in 64-bit

["Steve Huston (JIRA)" <qp...@incubator.apache.org>]

Mismatch uint32_t / size_t generates many compile warnings, esp in 64-bit
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                 Key: QPID-2574
                 URL: https://issues.apache.org/jira/browse/QPID-2574
             Project: Qpid
          Issue Type: Bug
          Components: C++ Broker, C++ Client, Code Generator
    Affects Versions: 0.6
            Reporter: Steve Huston
            Priority: Minor


There are many places in the C++ code that mix uint32_t, usually in the form of an encoding or Buffer size, with size_t, usually the result of a size() call to a string or some other container. In a Windows 64-bit build this produces a warning for each occurrence similar to:

3>C:\ace\exported\qpid\trunk\qpid\cpp\src\qpid/broker/Exchange.h(122) : warning C4267: 'return' : conversion from 'size_t' to 'uint32_t', possible loss of data

This type of code is present in both hand-written and generated code, which is why I included the Code generator in the Components.

Some can be removed with a cast - for example, the Uuid::encodedSize method isn't going to return a value greater than 2^32-1, so it can be safely cast away. But the problem should be dealt with more cleanly, I think.

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