Bugs item #3426020, was opened at 2011-10-19 17:29
Message generated for change (Tracker Item Submitted) made by dalke
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Category: None
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Andrew Dalke (dalke)
Assigned to: Nobody/Anonymous (nobody)
Summary: SMILES parser should fail with bad characters
Initial Comment:
formats/smilesformat.cpp contains the two lines (starting at line 407)
if (*_ptr<0 || isspace(*_ptr))
continue;
This tells it to ignore any whitespace in the SMILES string (so the non-SMILES
"C P" gets interpreted as "CP").
It also tells the parser to ignore any bytes with the high bit set.
The latter is a problem if the input comes from a UTF-8 encoded source, where
the non-ASCII characters are encoded with bytes which set the high bit. It
means that an input like "CöP" will be interpreted as "CP".
The fix should be:
if (*_ptr<0 || isspace(*_ptr))
return false; // unsupported character
BTW, ideally "_ptr" should be a "signed char *". SGIs, for example, used an
unsigned char as the default "char" type. I don't know if this is important
these days.
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