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authorPatrick Palka <ppalka@redhat.com>2022-05-02 07:00:48 -0400
committerPatrick Palka <ppalka@redhat.com>2022-05-02 07:00:48 -0400
commit576f975cabb0fd9843de152a2d247d486a967b08 (patch)
tree72fc12a9bf8d8f05879bffe288acbeed7a0a9c30
parent02f03c5c826d0cb7c32398af0c4282921e6e072a (diff)
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libstdc++: case-sensitivity in hexfloat std::from_chars [PR105441]
The hexfloat parser for binary32/64 added in r12-6645-gcc3bf3404e4b1c overlooked that the exponent part can also begin with an uppercase 'P'. PR libstdc++/105441 libstdc++-v3/ChangeLog: * src/c++17/floating_from_chars.cc (__floating_from_chars_hex): Also accept 'P' as the start of the exponent. * testsuite/20_util/from_chars/7.cc: Add corresponding testcase.
-rw-r--r--libstdc++-v3/src/c++17/floating_from_chars.cc2
-rw-r--r--libstdc++-v3/testsuite/20_util/from_chars/7.cc1
2 files changed, 2 insertions, 1 deletions
diff --git a/libstdc++-v3/src/c++17/floating_from_chars.cc b/libstdc++-v3/src/c++17/floating_from_chars.cc
index 13de1e3..e7f3a58 100644
--- a/libstdc++-v3/src/c++17/floating_from_chars.cc
+++ b/libstdc++-v3/src/c++17/floating_from_chars.cc
@@ -664,7 +664,7 @@ namespace
// Parse the written exponent.
int written_exponent = 0;
- if (first != last && *first == 'p')
+ if (first != last && (*first == 'p' || *first == 'P'))
{
// Tentatively consume the 'p' and try to parse a decimal number.
const char* const fallback_first = first;
diff --git a/libstdc++-v3/testsuite/20_util/from_chars/7.cc b/libstdc++-v3/testsuite/20_util/from_chars/7.cc
index 2a78c74..1aa9b23 100644
--- a/libstdc++-v3/testsuite/20_util/from_chars/7.cc
+++ b/libstdc++-v3/testsuite/20_util/from_chars/7.cc
@@ -96,6 +96,7 @@ constexpr testcase testcases[] = {
{ "1p-1", 4, {}, 0x1p-1 },
{ "0", 1, {}, 0.0 },
{ "A", 1, {}, 0xA },
+ { "1.ABCDEFP+10", 12, {}, 0x1.ABCDEFP+10 },
{ "-1", 2, {}, -1.0 },
{ "-0", 2, {}, -0.0 },
{ "42", 2, {}, 0x42p0 },