1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
// Copyright (c) 2011-2013 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "bitcoinunits.h"
#include <QStringList>
BitcoinUnits::BitcoinUnits(QObject *parent):
QAbstractListModel(parent),
unitlist(availableUnits())
{
}
QList<BitcoinUnits::Unit> BitcoinUnits::availableUnits()
{
QList<BitcoinUnits::Unit> unitlist;
unitlist.append(BTC);
unitlist.append(mBTC);
unitlist.append(uBTC);
return unitlist;
}
bool BitcoinUnits::valid(int unit)
{
switch(unit)
{
case BTC:
case mBTC:
case uBTC:
return true;
default:
return false;
}
}
QString BitcoinUnits::name(int unit)
{
switch(unit)
{
case BTC: return QString("BTC");
case mBTC: return QString("mBTC");
case uBTC: return QString::fromUtf8("μBTC");
default: return QString("???");
}
}
QString BitcoinUnits::description(int unit)
{
switch(unit)
{
case BTC: return QString("Bitcoins");
case mBTC: return QString("Milli-Bitcoins (1 / 1" THIN_SP_UTF8 "000)");
case uBTC: return QString("Micro-Bitcoins (1 / 1" THIN_SP_UTF8 "000" THIN_SP_UTF8 "000)");
default: return QString("???");
}
}
qint64 BitcoinUnits::factor(int unit)
{
switch(unit)
{
case BTC: return 100000000;
case mBTC: return 100000;
case uBTC: return 100;
default: return 100000000;
}
}
qint64 BitcoinUnits::maxAmount(int unit)
{
switch(unit)
{
case BTC: return Q_INT64_C(21000000);
case mBTC: return Q_INT64_C(21000000000);
case uBTC: return Q_INT64_C(21000000000000);
default: return 0;
}
}
int BitcoinUnits::amountDigits(int unit)
{
switch(unit)
{
case BTC: return 8; // 21,000,000 (# digits, without commas)
case mBTC: return 11; // 21,000,000,000
case uBTC: return 14; // 21,000,000,000,000
default: return 0;
}
}
int BitcoinUnits::decimals(int unit)
{
switch(unit)
{
case BTC: return 8;
case mBTC: return 5;
case uBTC: return 2;
default: return 0;
}
}
QString BitcoinUnits::format(int unit, qint64 n, bool fPlus, SeparatorStyle separators, bool fAlign)
{
// Note: not using straight sprintf here because we do NOT want
// localized number formatting.
if(!valid(unit))
return QString(); // Refuse to format invalid unit
qint64 coin = factor(unit);
int num_decimals = decimals(unit);
qint64 n_abs = (n > 0 ? n : -n);
qint64 quotient = n_abs / coin;
qint64 remainder = n_abs % coin;
QString quotient_str = QString::number(quotient);
QString remainder_str = QString::number(remainder).rightJustified(num_decimals, '0');
// Use SI-stule separators as these are locale indendent and can't be
// confused with the decimal marker. Rule is to use a thin space every
// three digits on *both* sides of the decimal point - but only if there
// are five or more digits
QChar thin_sp(THIN_SP_CP);
int q_size = quotient_str.size();
if (separators == separatorAlways || (separators == separatorStandard && q_size > 4))
for (int i = 3; i < q_size; i += 3)
quotient_str.insert(q_size - i, thin_sp);
int r_size = remainder_str.size();
if (separators == separatorAlways || (separators == separatorStandard && r_size > 4))
for (int i = 3, adj = 0; i < r_size ; i += 3, adj++)
remainder_str.insert(i + adj, thin_sp);
if (n < 0)
quotient_str.insert(0, '-');
else if (fPlus && n > 0)
quotient_str.insert(0, '+');
return quotient_str + QString(".") + remainder_str;
}
QString BitcoinUnits::formatWithUnit(int unit, qint64 amount, bool plussign, SeparatorStyle separators, bool fAlign)
{
return format(unit, amount, plussign, separators, fAlign) + QString(" ") + name(unit);
}
QString BitcoinUnits::formatHtmlWithUnit(int unit, qint64 amount, bool plussign, SeparatorStyle separators)
{
QString str(formatWithUnit(unit, amount, plussign, separators));
str.replace(QChar(THIN_SP_CP), QString(THIN_SP_HTML));
return QString("<span style='white-space: nowrap;'>%1</span>").arg(str);
}
bool BitcoinUnits::parse(int unit, const QString &value, qint64 *val_out)
{
if(!valid(unit) || value.isEmpty())
return false; // Refuse to parse invalid unit or empty string
int num_decimals = decimals(unit);
// Ignore spaces and thin spaces when parsing
QStringList parts = removeSpaces(value).split(".");
if(parts.size() > 2)
{
return false; // More than one dot
}
QString whole = parts[0];
QString decimals;
if(parts.size() > 1)
{
decimals = parts[1];
}
if(decimals.size() > num_decimals)
{
return false; // Exceeds max precision
}
bool ok = false;
QString str = whole + decimals.leftJustified(num_decimals, '0');
if(str.size() > 18)
{
return false; // Longer numbers will exceed 63 bits
}
qint64 retvalue = str.toLongLong(&ok);
if(val_out)
{
*val_out = retvalue;
}
return ok;
}
int BitcoinUnits::rowCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return unitlist.size();
}
QVariant BitcoinUnits::data(const QModelIndex &index, int role) const
{
int row = index.row();
if(row >= 0 && row < unitlist.size())
{
Unit unit = unitlist.at(row);
switch(role)
{
case Qt::EditRole:
case Qt::DisplayRole:
return QVariant(name(unit));
case Qt::ToolTipRole:
return QVariant(description(unit));
case UnitRole:
return QVariant(static_cast<int>(unit));
}
}
return QVariant();
}
|
