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Overview
Comment:Performance improvement for ascii to floating-point conversions with very large exponents.
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SHA1:59bb999c8ba5e4ee7a4e388fc724b8606136d60c
User & Date: drh 2011-10-17 12:14:26
Context
2011-10-17
20:41
Avoid 32-bit integer overflow when evaluating the exponent of a floating point value during ascii to binary conversion. check-in: 4becc47e user: drh tags: trunk
12:14
Performance improvement for ascii to floating-point conversions with very large exponents. check-in: 59bb999c user: drh tags: trunk
2011-10-15
00:16
Added the tool/warnings-clang.sh script. Changes so that there are no warnings with either gcc or clang even including FTS4 and RTREE and both with and without SQLITE_THREADSAFE=0. check-in: 39408702 user: drh tags: trunk
Changes
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Changes to src/util.c.

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        if( esign<0 ){
          result = s / scale;
          result /= 1.0e+308;
        }else{
          result = s * scale;
          result *= 1.0e+308;
        }






      }else{
        /* 1.0e+22 is the largest power of 10 than can be 
        ** represented exactly. */
        while( e%22 ) { scale *= 1.0e+1; e -= 1; }
        while( e>0 ) { scale *= 1.0e+22; e -= 22; }
        if( esign<0 ){
          result = s / scale;







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        if( esign<0 ){
          result = s / scale;
          result /= 1.0e+308;
        }else{
          result = s * scale;
          result *= 1.0e+308;
        }
      }else if( e>=342 ){
        if( esign<0 ){
          result = 0.0*s;
        }else{
          result = 1e308*1e308*s;  /* Infinity */
        }
      }else{
        /* 1.0e+22 is the largest power of 10 than can be 
        ** represented exactly. */
        while( e%22 ) { scale *= 1.0e+1; e -= 1; }
        while( e>0 ) { scale *= 1.0e+22; e -= 22; }
        if( esign<0 ){
          result = s / scale;