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Fix initialisation of NSUUID from string (permit mixed case hex digits)

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This commit is contained in:
Richard Frith-Macdonald 2020-12-15 10:40:55 +00:00
parent c1d98567a8
commit bcbdeb64a8
2 changed files with 33 additions and 7 deletions
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32
Source/NSUUID.m
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@ -219,12 +219,34 @@ static int uuid_from_string(const char *string, unsigned char *uuid)
for (i = 0; i < kUUIDByteCount; i++)
{
char thisDigit[3];
int hi = unformatted[2*i];
int lo = unformatted[2*i+1];
thisDigit[0] = unformatted[2*i];
thisDigit[1] = unformatted[2*i+1];
thisDigit[2] = 0;
uuid[i] = strtoul(thisDigit, NULL, kUUIDByteCount);
if (isdigit(hi))
{
hi -= '0';
}
else if (isupper(hi))
{
hi = hi - 'A' + 10;
}
else
{
hi = hi - 'a' + 10;
}
if (isdigit(lo))
{
lo -= '0';
}
else if (isupper(lo))
{
lo = lo - 'A' + 10;
}
else
{
lo = lo - 'a' + 10;
}
uuid[i] = (hi << 4) | lo;
}
return 0;
}