Actually, SQLite does use sqlite3_uri_parameter indirectly via
sqlite3_uri_boolean, but I haven't been able to blow up sqlite3 by supplying
malformed URIs. I thing sqlite3ParseUri throws bad options away.
On Thursday, July 3, 2014 3:20 PM, Peter Aronson <pbaron...@att.net> wrote:
>
>
>I believe the function expects URIs of the general form (before separators are
>converted to Nuls) of file:filename?param1=value1¶m2=v2 coverted into file
>nul param1 nul value1 ... which means that the argument to this function is
>always expected to have an odd number of strings. Your input has an even
>number. However, it does seems wrong that a malformed URI should cause an
>access violation. It does not appear that SQLite uses this function itself.
>
>Peter
>
>
>On Thursday, July 3, 2014 1:51 PM, Ronan Meneu <ronan.me...@gmail.com> wrote:
>
>
>>
>>
>>Hello,
>>
>>Using VFS and sqlite3_uri_parameter, it appears that it ends with an Access
>>Violation.
>>
>>Looking a bit more closely to the code of this function:
>>
>>SQLITE_API const char *sqlite3_uri_parameter(const char *zFilename, const
>>char *zParam){
>> if( zFilename==0 ) return 0;
>> zFilename += sqlite3Strlen30(zFilename) + 1;
>> while( zFilename[0] ){
>> int x = strcmp(zFilename, zParam);
>> zFilename += sqlite3Strlen30(zFilename) + 1;
>> if( x==0 ) return zFilename;
>> zFilename += sqlite3Strlen30(zFilename) + 1;
>> }
>> return 0;
>>}
>>
>>It appears that, if i understand well, it is expecting a series a
>>null-terminated strings. I don't know if our issue comes from the zFilename
>>not properly formatted: we have filename0filename00
>>
>>The first "zFilename += sqlite3Strlen30(zFilename) + 1;" consumes the
>>first filename.
>>Then, it expects pairs of arg and values (?).
>>
>>In our case, algorithm goes one char too far.
>>
>>Except if you add a line just before the third "zFilename +=
>>sqlite3Strlen30(zFilename) + 1;"
>>if (zFilename[0] == 0) break;
>>
>>Is it an issue in the function, or is it coming from the zFilename input?
>>
>>Thanks,
>>
>> Ronan
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>
>>
>>
>>
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