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| author | Vasil Dimov <vd@FreeBSD.org> | 2020-08-31 10:39:00 +0200 |
|---|---|---|
| committer | Vasil Dimov <vd@FreeBSD.org> | 2020-09-11 13:35:39 +0200 |
| commit | d2bb681f96fb327b4c4d5b2b113692ca22fdffbf (patch) | |
| tree | 21e9dd765e4d7d389f55cc0b5c6fca7ddce2ff2d /src/util/string.h | |
| parent | a47e5964861dfb98d61719c9852e12fd6da84c31 (diff) | |
| download | bitcoin-d2bb681f96fb327b4c4d5b2b113692ca22fdffbf.tar.xz | |
util: move HasPrefix() so it can be reused
Move the function `HasPrefix()` from `netaddress.cpp` to `util/string.h`
so it can be reused by `CNetAddr` methods (and possibly others).
Diffstat (limited to 'src/util/string.h')
| -rw-r--r-- | src/util/string.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/src/util/string.h b/src/util/string.h index cdb41630c6..a0c87bd00c 100644 --- a/src/util/string.h +++ b/src/util/string.h @@ -7,6 +7,8 @@ #include <attributes.h> +#include <algorithm> +#include <array> #include <cstring> #include <locale> #include <sstream> @@ -74,4 +76,15 @@ std::string ToString(const T& t) return oss.str(); } +/** + * Check whether a container begins with the given prefix. + */ +template <typename T1, size_t PREFIX_LEN> +NODISCARD inline bool HasPrefix(const T1& obj, + const std::array<uint8_t, PREFIX_LEN>& prefix) +{ + return obj.size() >= PREFIX_LEN && + std::equal(std::begin(prefix), std::end(prefix), std::begin(obj)); +} + #endif // BITCOIN_UTIL_STRENCODINGS_H |