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Generalize ConvertBits

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This commit is contained in:
Pieter Wuille
2017-11-22 17:04:48 -08:00
committed by Jack Grigg
parent 6b759fb092
commit ac70f76c5d
2 changed files with 9 additions and 9 deletions
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6
src/utilstrencodings.h
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@@ -135,7 +135,7 @@ bool ParseFixedPoint(const std::string &val, int decimals, int64_t *amount_out);
/** Convert from one power-of-2 number base to another. */
template<int frombits, int tobits, bool pad, typename O, typename I>
bool ConvertBits(O& out, I it, I end) {
bool ConvertBits(const O& outfn, I it, I end) {
size_t acc = 0;
size_t bits = 0;
constexpr size_t maxv = (1 << tobits) - 1;
@@ -145,12 +145,12 @@ bool ConvertBits(O& out, I it, I end) {
bits += frombits;
while (bits >= tobits) {
bits -= tobits;
out.push_back((acc >> bits) & maxv);
outfn((acc >> bits) & maxv);
}
++it;
}
if (pad) {
if (bits) out.push_back((acc << (tobits - bits)) & maxv);
if (bits) outfn((acc << (tobits - bits)) & maxv);
} else if (bits >= frombits || ((acc << (tobits - bits)) & maxv)) {
return false;
}