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Prevously, if INT_MIN was passed as a wildcard width to a printf
conversion the parser would attempt to negate it to get the positive
width (and set the left justify flag), but it would underflow and the
width would be treated as 0. This patch corrects the issue by instead
treating a width of INT_MIN as identical to -INT_MAX.
Also includes docs changes to explain this behavior and adding b to the
list of int conversions.
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This is step 4 of
https://discourse.llvm.org/t/rfc-customizable-namespace-to-allow-testing-the-libc-when-the-system-libc-is-also-llvms-libc/73079
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The new printf writer design focuses on optimizing the fast path. It
inlines any write to a buffer or string, and by handling buffering
itself can more effectively work with both internal and external file
implementations. The overflow hook should allow for expansion to
asprintf with minimal extra code.
Reviewed By: sivachandra
Differential Revision: https://reviews.llvm.org/D153999
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This part of the effort to make all test related pieces into the `test`
directory. This helps is excluding test related pieces in a straight
forward manner if LLVM_INCLUDE_TESTS is OFF. Future patches will also move
the MPFR wrapper and testutils into the 'test' directory.
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After adding sprintf, snprintf is simple. The functions are very
similar. The tests only cover the behavior of the max length since the
sprintf tests should cover the other behavior.
Reviewed By: lntue
Differential Revision: https://reviews.llvm.org/D125826
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