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Overview
Comment:Fix parsing UTF16 nums with multi-digit exponents
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SHA1: 667cfd8694a448eda3e6a3d16b72f4997266c459
User & Date: peterreid 2013-10-25 01:33:52.142
Context
2013-10-25
02:37
Fix buffer overread when parsing a UTF16 exponent check-in: 9e61c90be4 user: peterreid tags: trunk
01:33
Fix parsing UTF16 nums with multi-digit exponents check-in: 667cfd8694 user: peterreid tags: trunk
01:27
Test sqlite4_num_from_text with UTF16BE and UTF16LE check-in: 9c4e33cc5b user: peterreid tags: trunk
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/math.c.
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      if( c=='.' ){
        /* Permit only a single radix in each number */
        if( seenRadix ) goto finished;
        seenRadix = 1;
        bReal = 1;
      }else if( c=='e' || c=='E' ){
        int f = (flags & (SQLITE4_PREFIX_ONLY|SQLITE4_IGNORE_WHITESPACE));

        sqlite4_num exp;
        exp = sqlite4_num_from_text(&zIn[i+incr], nIn-i-incr, f, 0);
        if( sqlite4_num_isnan(exp) ) goto finished;
        if( exp.e || exp.m>999 ) goto finished;
        bReal = 1;
        r.e += (int)(exp.m) * (exp.sign ? -1 : 1);
        i = nIn;








>








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      if( c=='.' ){
        /* Permit only a single radix in each number */
        if( seenRadix ) goto finished;
        seenRadix = 1;
        bReal = 1;
      }else if( c=='e' || c=='E' ){
        int f = (flags & (SQLITE4_PREFIX_ONLY|SQLITE4_IGNORE_WHITESPACE));
        if( incr==2 ) f |= SQLITE4_UTF16LE; 
        sqlite4_num exp;
        exp = sqlite4_num_from_text(&zIn[i+incr], nIn-i-incr, f, 0);
        if( sqlite4_num_isnan(exp) ) goto finished;
        if( exp.e || exp.m>999 ) goto finished;
        bReal = 1;
        r.e += (int)(exp.m) * (exp.sign ? -1 : 1);
        i = nIn;
︙︙
Changes to test/num.test.
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  } $out
}

#-------------------------------------------------------------------------
# Test from UTF16BE text
#
foreach {tn in len out} {
  0     274   -1   274

} {
  do_test num-9.3.$tn { 
    sqlite4_num_to_text [sqlite4_num_from_text $in $len b]
  } $out
} 

#-------------------------------------------------------------------------
# Test from UTF16LE text
#
foreach {tn in len out} {
  0     4639   -1   4639

} {
  do_test num-9.3.$tn { 
    sqlite4_num_to_text [sqlite4_num_from_text $in $len l]
  } $out
} 

foreach {tn in out} {








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  } $out
}

#-------------------------------------------------------------------------
# Test from UTF16BE text
#
foreach {tn in len out} {
  0     274    -1   274
  1     3e+484 -1   3e+484
} {
  do_test num-9.3.$tn { 
    sqlite4_num_to_text [sqlite4_num_from_text $in $len b]
  } $out
} 

#-------------------------------------------------------------------------
# Test from UTF16LE text
#
foreach {tn in len out} {
  0     4639   -1    4639
  1     5e+388 -1    5e+388 
} {
  do_test num-9.3.$tn { 
    sqlite4_num_to_text [sqlite4_num_from_text $in $len l]
  } $out
} 

foreach {tn in out} {
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