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avoid a string copy in printHash16

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Vaci Koblizek 2023-03-29 10:54:27 +01:00
parent ccf7ce26fe
commit a4dd87a2b3
1 changed files with 5 additions and 4 deletions
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9
src/libutil/hash.cc
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@ -71,12 +71,13 @@ const std::string base16Chars = "0123456789abcdef";
static std::string printHash16(const Hash & hash) static std::string printHash16(const Hash & hash)
{ {
char buf[hash.hashSize * 2]; std::string buf;
buf.reserve(hash.hashSize * 2);
for (unsigned int i = 0; i < hash.hashSize; i++) { for (unsigned int i = 0; i < hash.hashSize; i++) {
buf[i * 2] = base16Chars[hash.hash[i] >> 4]; buf.push_back(base16Chars[hash.hash[i] >> 4]);
buf[i * 2 + 1] = base16Chars[hash.hash[i] & 0x0f]; buf.push_back(base16Chars[hash.hash[i] & 0x0f]);
} }
return std::string(buf, hash.hashSize * 2); return buf;
} }