oxen-io/session-ios
1
0
Fork 0
mirror of https://github.com/oxen-io/session-ios.git synced 2023-12-13 21:30:14 +01:00
Code Issues Projects Releases Wiki Activity

Found a method to parse NSUInteger exactly and precisely //FREEBIE

Browse source
This commit is contained in:
Craig Gidney 2014-10-07 11:25:27 -04:00
parent 00ea396ff8
commit a060bea69d
1 changed files with 8 additions and 1 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

9
Signal/src/util/StringUtil.m
View file

@ -134,7 +134,14 @@
-(NSNumber*) tryParseAsDecimalNumber {
NSNumberFormatter* formatter = [NSNumberFormatter new];
[formatter setNumberStyle:NSNumberFormatterDecimalStyle];
return [formatter numberFromString:self];
// NSNumberFormatter.numberFromString is good at noticing bad inputs, but loses precision for large values
// NSDecimalNumber.decimalNumberWithString has perfect precision, but lets bad inputs through sometimes (e.g. "88ffhih" -> 88)
// We use both to get both accuracy and detection of bad inputs
if ([formatter numberFromString:self] == nil) {
return nil;
}
return [NSDecimalNumber decimalNumberWithString:self];
}
-(NSNumber*) tryParseAsUnsignedInteger {
NSNumber* value = [self tryParseAsDecimalNumber];