Correct compilation warnings for 'int' casts with correct types

[huguesdpdn-aerospace]

Fix a potential error on some specific architectures (aka devices with sizeof(int) different of sizeof(ssize_t)) where a size_t or ssize_t are not actually a real int. When dealing (subtracting or adding values) with size_t with negative value, int you should not be use but rather its dedicated opposite version, aka the signed one: ssize_t

Also, when dealing with tellg, actually it returns a streampos (see C++ Reference | std::streampos ) which should not be incremented or decremented with any integer. Instead, a dedicated method should be called by using std::streamoff for that in the class (see C++ Reference | std::streamoff )

[aiksiongkoh]

Windows build failed. @huguesdpdn-aerospace please check. Thanks.

[huguesdpdn-aerospace]

Indeed Windows do not recognise ssize_t and I don't have any computer running not under Windows so I added a pre-processor macro with a typedef since SSIZE_T exists on Windows but not on Unix. Would need you @aiksiongkoh to execute the workflow and check if it compiles.

[aiksiongkoh]

@huguesdpdn-aerospace Please see build failures due to typo. Thanks.

[aiksiongkoh]

@huguesdpdn-aerospace Please remove the extra || in line below
15 | #if defined(WIN32) || defined(_WIN32) || || defined(WIN32) || defined(NT)

[huguesdpdn-aerospace]

Hello @aiksiongkoh , sorry I was in vacation. In addition, it was a stupid and easy typo to fix, sorry :/

Can you please approve the test workflow ? Thank you

[huguesdpdn-aerospace]

Hi @aiksiongkoh , thanks for the workflow approval.

Unfortunately, couldn't test under Windows and it seems that the macro SSIZE_T was not defined because under Windows, for SSIZE_T , documentation specify that we need to include Windows Data Types

A copy of the declared data can be found here: Windows 10 SDK - baseTsd.h

Need a new approval to re-execute the compilation tests