=?utf-8?q?Balázs_Kéri?= <[email protected]>,
=?utf-8?q?Balázs_Kéri?= <[email protected]>,
=?utf-8?q?Balázs_Kéri?= <[email protected]>
Message-ID:
In-Reply-To: <llvm.org/llvm/llvm-project/pull/[email protected]>
================
@@ -2201,6 +2214,56 @@ void StdLibraryFunctionsChecker::initFunctionSummaries(
ErrnoNEZeroIrrelevant, GenericFailureMsg)
.ArgConstraint(NotNull(ArgNo(0))));
+ // int fgetc(FILE *stream);
+ // 'getc' is the same as 'fgetc' but may be a macro
+ addToFunctionSummaryMap(
+ {"getc", "fgetc"}, Signature(ArgTypes{FilePtrTy}, RetType{IntTy}),
+ Summary(NoEvalCall)
+ .Case({ReturnValueCondition(WithinRange, {{0, UCharRangeMax}})},
+ ErrnoMustNotBeChecked, GenericSuccessMsg)
+ .Case({ReturnValueCondition(WithinRange, SingleValue(EOFv))},
+ ErrnoNEZeroIrrelevant, GenericFailureMsg)
+ .ArgConstraint(NotNull(ArgNo(0))));
----------------
benshi001 wrote:
As far as my understanding, `fgetc` does not always set the `errno` even if
`EOF` is returned, this happens if there is no error but reach the end of file.
https://pubs.opengroup.org/onlinepubs/9699919799/
https://github.com/llvm/llvm-project/pull/76979
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