vasilito
cf12defd28
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
45 lines
1.1 KiB
C++
45 lines
1.1 KiB
C++
|
|
/*
|
|
SPDX-FileCopyrightText: 2021 Volker Krause <vkrause@kde.org>
|
|
|
|
SPDX-License-Identifier: LGPL-2.0-or-later
|
|
*/
|
|
|
|
#include "kcodecs.h"
|
|
#include "kcodecs_debug.h"
|
|
|
|
#include <QDebug>
|
|
|
|
static constexpr const char base45Table[] = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ $%*+-./:";
|
|
|
|
static uint8_t base45MapFromChar(char c)
|
|
{
|
|
const auto it = std::find(std::begin(base45Table), std::end(base45Table), c);
|
|
if (it == std::end(base45Table)) {
|
|
qCWarning(KCODECS_LOG) << "invalid base45 character:" << c;
|
|
return 0;
|
|
}
|
|
return std::distance(std::begin(base45Table), it);
|
|
}
|
|
|
|
QByteArray KCodecs::base45Decode(QByteArrayView in)
|
|
{
|
|
QByteArray out;
|
|
out.reserve(((in.size() / 3) + 1) * 2);
|
|
|
|
for (qsizetype i = 0; i + 1 < in.size(); i += 3) {
|
|
uint32_t n = base45MapFromChar(in[i]) + base45MapFromChar(in[i + 1]) * 45;
|
|
if (i + 2 < in.size()) {
|
|
n += 45 * 45 * base45MapFromChar(in[i + 2]);
|
|
out.push_back(n >> 8);
|
|
} else {
|
|
if (n >> 8) {
|
|
out.push_back(n >> 8);
|
|
}
|
|
}
|
|
out.push_back(n % 256);
|
|
}
|
|
|
|
return out;
|
|
}
|