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| author | Simon Marchi <simon.marchi@efficios.com> | 2022-10-20 13:05:19 -0400 |
|---|---|---|
| committer | Simon Marchi <simon.marchi@polymtl.ca> | 2023-01-05 14:38:51 -0500 |
| commit | 1a8605a8c79b0c4ebc71f5691e36a1338d407837 (patch) | |
| tree | ecef4a6328ed0a9185e6424bbd7182d092840b17 /gdbsupport | |
| parent | 72127b193c970a61a36c940bf167c596ddc32eae (diff) | |
| download | gdb-1a8605a8c79b0c4ebc71f5691e36a1338d407837.zip gdb-1a8605a8c79b0c4ebc71f5691e36a1338d407837.tar.gz gdb-1a8605a8c79b0c4ebc71f5691e36a1338d407837.tar.bz2 | |
gdbsupport: add gdb::string_view_hash
Add the string_view_hash type, which will be useful to be able to use
gdb::string_view as std::unordered_map keys.
Use it in gdb/symtab.c, to exercise it.
Change-Id: Id69a466ab19a9f6620b5df8a2dd29b5cddd94c00
Approved-By: Andrew Burgess <aburgess@redhat.com>
Diffstat (limited to 'gdbsupport')
| -rw-r--r-- | gdbsupport/common-utils.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gdbsupport/common-utils.h b/gdbsupport/common-utils.h index 31ab1a6..97dcb9f 100644 --- a/gdbsupport/common-utils.h +++ b/gdbsupport/common-utils.h @@ -209,4 +209,21 @@ fast_hash (const void *ptr, size_t len, unsigned int start_value = 0) #endif } +namespace gdb +{ + +/* Hash type for gdb::string_view. + + Even after we switch to C++17 and dump our string_view implementation, we + might want to keep this hash implementation if it's faster than std::hash + for std::string_view. */ + +struct string_view_hash +{ + std::size_t operator() (gdb::string_view view) const + { return fast_hash (view.data (), view.length ()); } +}; + +} /* namespace gdb */ + #endif /* COMMON_COMMON_UTILS_H */ |