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#include "bitcoinaddressvalidator.h"
/* Base58 characters are:
"123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz"
This is:
- All numbers except for '0'
- All uppercase letters except for 'I' and 'O'
- All lowercase letters except for 'l'
User friendly Base58 input can map
- 'l' and 'I' to '1'
- '0' and 'O' to 'o'
*/
BitcoinAddressValidator::BitcoinAddressValidator(QObject *parent) :
QValidator(parent)
{
}
QValidator::State BitcoinAddressValidator::validate(QString &input, int &pos) const
{
// Correction
for(int idx=0; idx<input.size();)
{
bool removeChar = false;
QChar ch = input.at(idx);
// Transform characters that are visually close
switch(ch.unicode())
{
case 'l':
case 'I':
input[idx] = QChar('1');
break;
case '0':
case 'O':
input[idx] = QChar('o');
break;
// Qt categorizes these as "Other_Format" not "Separator_Space"
case 0x200B: // ZERO WIDTH SPACE
case 0xFEFF: // ZERO WIDTH NO-BREAK SPACE
removeChar = true;
break;
default:
break;
}
// Remove whitespace
if(ch.isSpace())
removeChar = true;
// To next character
if(removeChar)
input.remove(idx, 1);
else
++idx;
}
// Validation
QValidator::State state = QValidator::Acceptable;
for(int idx=0; idx<input.size(); ++idx)
{
int ch = input.at(idx).unicode();
if(((ch >= '0' && ch<='9') ||
(ch >= 'a' && ch<='z') ||
(ch >= 'A' && ch<='Z')) &&
ch != 'l' && ch != 'I' && ch != '0' && ch != 'O')
{
// Alphanumeric and not a 'forbidden' character
}
else
{
state = QValidator::Invalid;
}
}
// Empty address is "intermediate" input
if(input.isEmpty())
{
state = QValidator::Intermediate;
}
return state;
}
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