Gabriel Ravier e3d28de8a6 Fix UB in gdtoa hexadecimal float scanf and strtod (#1288) ... When reading hexadecimal floats, cosmopolitan would previously sometimes print a number of warnings relating to undefined behavior on left shift: third_party/gdtoa/gethex.c:172: ubsan warning: signed left shift changed sign bit or overflowed 12 'int' 28 'int' is undefined behavior This is because gdtoa assumes left shifts are safe when overflow happens even on signed integers - this is false: the C standard considers it UB. This is easy to fix, by simply casting the shifted value to unsigned, as doing so does not change the value or the semantics of the left shifting (except for avoiding the undefined behavior, as the C standard specifies that unsigned overflow yields wraparound, avoiding undefined behaviour). This commit does this, and adds a testcase that previously triggered UB. (this also adds test macros to test for exact float equality, instead of the existing {EXPECT,ASSERT}_FLOAT_EQ macros which only tests inputs for being "almost equal" (with a significant epsilon) whereas exact equality makes more sense for certain things such as reading floats from strings, and modifies other testcases for sscanf/fscanf of floats to utilize it).		2024-09-14 17:11:04 -07:00
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almostequal.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
almostequalf.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
almostequallongdouble.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
aspect.internal.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
bench.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
bench.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
benchmark.h	Add more tests for strlcpy()	2024-09-13 01:14:35 -07:00
benchrunner.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
binequals.c	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
blake2b256_tests.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
blake2b256_tests.txt	Run all BLAKE2B256 test vectors (#1185)	2024-05-24 10:59:23 -07:00
blocktronics.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
blocktronics.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
blocktronics.txt	Remove trailing whitespace from all files (#497)	2022-07-20 20:31:16 -07:00
BUILD.mk	Fix UB in gdtoa hexadecimal float scanf and strtod (#1288)	2024-09-14 17:11:04 -07:00
clearxmmregisters.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
contains.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
endswith.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
exactlyequallongdouble.c	Fix UB in gdtoa hexadecimal float scanf and strtod (#1288)	2024-09-14 17:11:04 -07:00
extract.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
ezbench.h	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
ezbenchcontrol.c	Make improvements	2024-02-12 10:23:00 -08:00
ezbenchreport.c	Get rid of .internal.h convention in LIBC_INTRIN	2024-07-19 19:38:00 -07:00
ezbenchwarn.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
fastrandomstring.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
fixture.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
fixturerunner.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
formatbinaryasglyphs.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
formatbinaryashex.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
formatbool.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
formatfloat.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
formatint.c	Fix ctype.h and wctype.h	2024-07-21 15:54:17 -07:00
formatrange.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
formatstr.c	Fix ctype.h and wctype.h	2024-07-21 15:54:17 -07:00
getcore.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
geterrno.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
getinterrupts.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
globals.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
hexequals.c	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
hyperion.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
hyperion.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
hyperion.txt	Initial import	2020-06-15 07:18:57 -07:00
incrementfailed.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
memoryexists.c	Make realloc() go 100x faster on Linux/NetBSD	2024-07-07 12:40:30 -07:00
moby.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
moby.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
moby.txt	Make improvements to redbean	2021-07-10 15:19:37 -07:00
polluteregisters.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
runner.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
seterrno.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
shoulddebugbreak.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
showerror.c	Get rid of .internal.h convention in LIBC_INTRIN	2024-07-19 19:38:00 -07:00
startswith.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
strcaseequals.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
strequals.c	Apply clang-format update to repo (#1154)	2024-04-25 10:38:00 -07:00
strerror.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
subprocess.h	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
testcase.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
testlib.h	Fix UB in gdtoa hexadecimal float scanf and strtod (#1288)	2024-09-14 17:11:04 -07:00
testmain.c	Make it so the test harness closes fds up to 100 (#1268)	2024-08-29 16:12:53 -07:00
testrunner.c	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
thunks.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
tmptest.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
viewables.h	Reduce header complexity	2023-11-28 14:39:42 -08:00
viewables.S	Remove .internal from more header filenames	2024-08-04 12:52:25 -07:00
viewables.txt	Do some string library work	2022-08-20 22:17:14 -07:00
waitforexit.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
waitforterm.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00
yield.c	flip et / noet in modelines	2023-12-07 22:17:11 -05:00