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Merge pull request #6366 from danpls/base64-reserve

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libutil: Reserve memory when en/decoding base64
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Eelco Dolstra 2022-04-05 23:20:33 +02:00 committed by GitHub
parent f89fa29914 1fa0393479
commit c0ad86f681
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1 changed files with 4 additions and 0 deletions
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src/libutil/util.cc
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@ -1471,6 +1471,7 @@ constexpr char base64Chars[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuv
std::string base64Encode(std::string_view s) std::string base64Encode(std::string_view s)
{ {
std::string res; std::string res;
res.reserve((s.size() + 2) / 3 * 4);
int data = 0, nbits = 0; int data = 0, nbits = 0;
for (char c : s) { for (char c : s) {
@ -1502,6 +1503,9 @@ std::string base64Decode(std::string_view s)
}(); }();
std::string res; std::string res;
// Some sequences are missing the padding consisting of up to two '='.
// vvv
res.reserve((s.size() + 2) / 4 * 3);
unsigned int d = 0, bits = 0; unsigned int d = 0, bits = 0;
for (char c : s) { for (char c : s) {