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Overview
Comment:Fix sqlite4_num_to_text when formatting an integer with a negative exponent. It was leaving an uninitialized byte in the destination string.
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SHA1: 3cac6cdb864a4ecbdea82bc5441bc80914cb2275
User & Date: peterreid 2013-02-14 01:51:45.349
Context
2013-02-14
15:32
Fold in Peter Reid's fixes and enhancements to the sqlite4_num object. check-in: 8ede88c1df user: drh tags: trunk
01:51
Fix sqlite4_num_to_text when formatting an integer with a negative exponent. It was leaving an uninitialized byte in the destination string. Leaf check-in: 3cac6cdb86 user: peterreid tags: num_work
2013-02-11
14:03
Add test fixture functions for sqlite4_num_isinf and sqlite4_num_isnan, and some related test cases. check-in: 58a9cfcb39 user: peterreid tags: num_work
Changes
Unified Diff Ignore Whitespace Patch
Changes to src/math.c.
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    zNum += m;
    n -= m;
    removeTrailingZeros(zNum, &n);
    if( n>0 ){
      zOut[0] = '.';
      memcpy(zOut+1, zNum, n);
      nOut += n;
    }
    zOut[n+1] = 0;



    return nOut;
  }
  if( x.e<0 && x.e >= -n-5 ){
    /* Values less than 1 and with no more than 5 subsequent zeros prior
    ** to the first significant digit.  Ex:  0.0000012345 */
    int j = -(n + x.e);
    memcpy(zOut, "0.", 2);








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    zNum += m;
    n -= m;
    removeTrailingZeros(zNum, &n);
    if( n>0 ){
      zOut[0] = '.';
      memcpy(zOut+1, zNum, n);
      nOut += n;

      zOut[n+1] = 0;
    }else{
      zOut[0] = 0;
    }
    return nOut;
  }
  if( x.e<0 && x.e >= -n-5 ){
    /* Values less than 1 and with no more than 5 subsequent zeros prior
    ** to the first significant digit.  Ex:  0.0000012345 */
    int j = -(n + x.e);
    memcpy(zOut, "0.", 2);
︙︙
Changes to test/num.test.
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do_test num-5.1.1 {
  sqlite4_num_to_text [sqlite4_num_mul 9 8]
} {72}

do_test num-6.1.1 {
  sqlite4_num_to_text [sqlite4_num_div 6 5]
} {1.2}









finish_test








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do_test num-5.1.1 {
  sqlite4_num_to_text [sqlite4_num_mul 9 8]
} {72}

do_test num-6.1.1 {
  sqlite4_num_to_text [sqlite4_num_div 6 5]
} {1.2}
do_test num-6.1.2 {
  sqlite4_num_compare 2 [sqlite4_num_div 2 1]
} {equal}
do_test num-6.1.3 {
  sqlite4_num_to_text [sqlite4_num_div 2 1]
} {2}
do_test num-6.1.4 {
  sqlite4_num_to_text [sqlite4_num_div 22 10]
} {2.2}
finish_test