gamesh411 added inline comments.

================
Comment at: 
clang/lib/StaticAnalyzer/Checkers/StdLibraryFunctionsChecker.cpp:697-699
+      // The behavior is undefined if the value of the argument is not
+      // representable as unsigned char or is not equal to EOF. See e.g. C99
+      // 7.4.1.2 The isalpha function (p: 181-182).
----------------
martong wrote:
> Szelethus wrote:
> > This is true for the rest of the summaries as well, but shouldn't we 
> > retrieve the `unsigned char` size from `ASTContext`?
> Yes this is a good idea. I will do this.
> 
> What bothers me really much, however, is that we should handle EOF in a 
> platform dependent way as well ... and I have absolutely no idea how to do 
> that given that is defined by a macro in a platform specific header file. I 
> am desperately in need for help and ideas about how could we get the value of 
> EOF for the analysed platform.
If the EOF is not used in the TU analyzed, then there would be no way to find 
the specific `#define`.
Another approach would be to check if the value is defined by an expression 
that is the EOF define (maybe transitively?).


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D73898/new/

https://reviews.llvm.org/D73898



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