Improved accuracy on text-to-real and real-to-text conversions. Most
conversions now round-trip correctly. Still need to fix some corner cases. FossilOrigin-Name: 8ecffca900cd6a8922001fd458a266ce8c83fb66
This commit is contained in:
drh
parent
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21
manifest
21
manifest
@ -1,5 +1,5 @@
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C Improved\srounding\saccuracy\son\stest-to-float\sconversions.
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D 2012-06-19T00:45:16.776
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C Improved\saccuracy\son\stext-to-real\sand\sreal-to-text\sconversions.\s\sMost\nconversions\snow\sround-trip\scorrectly.\s\sStill\sneed\sto\sfix\ssome\scorner\ncases.
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D 2012-06-19T03:11:25.621
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F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
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F Makefile.in d17fddaa4e81f93a7c9c7c0808aacb3fc95f79f4
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F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
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@ -135,7 +135,7 @@ F src/delete.c 4c20ea4f6213b3bc1c6a510586864b679946e05e
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F src/expr.c 06a7733d19dc725dc46ba51afd9feadb4b85d991
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F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
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F src/fkey.c 657212460bf5cfd3ae607d12ea62092844c227b5
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F src/func.c c6b3c94320253a35bda43fb69cc292618e3285d6
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F src/func.c 22a180ac02e725a16aed586c3ae1c1c0f7c79cfd
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F src/global.c 4cfdca5cb0edd33c4d021baec4ede958cb2c793b
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F src/hash.c 458488dcc159c301b8e7686280ab209f1fb915af
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F src/hash.h 2894c932d84d9f892d4b4023a75e501f83050970
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@ -174,7 +174,7 @@ F src/pcache.h 1b5dcc3dc8103d03e625b177023ee67764fa6b7c
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F src/pcache1.c 2234d84f9c003d800a57f00f8535c91667fa4f6c
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F src/pragma.c eee3e3161f82a1e06f632a8d2a82b29ba3c45889
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F src/prepare.c 33291b83cca285718048d219c67b8298501fa3a5
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F src/printf.c 7ffb4ebb8b341f67e049695ba031da717b3d2699
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F src/printf.c 263748c3b1e41f9f16a567ef2cbe4cf95b897a1a
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F src/random.c cd4a67b3953b88019f8cd4ccd81394a8ddfaba50
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F src/resolve.c b3c70ab28cac60de33684c9aa9e5138dcf71d6dd
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F src/rowset.c f6a49f3e9579428024662f6e2931832511f831a1
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@ -274,7 +274,7 @@ F test/async2.test c0a9bd20816d7d6a2ceca7b8c03d3d69c28ffb8b
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F test/async3.test d73a062002376d7edc1fe3edff493edbec1fc2f7
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F test/async4.test 1787e3952128aa10238bf39945126de7ca23685a
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F test/async5.test 0dd8701bd588bf6e70c2557a22ae3f22b2567b4c
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F test/atof1.test 1f6dc0f47f6697e32fa51dd154412e1172984928
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F test/atof1.test 6e6d41337133cb98e61262fa385780e04e9de165
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F test/attach.test 0d112b7713611fdf0340260192749737135fda5f
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F test/attach2.test e54436ed956d3d88bdee61221da59bf3935a0966
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F test/attach3.test d89ccfe4fe6e2b5e368d480fcdfe4b496c54cf4e
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@ -364,7 +364,7 @@ F test/crashtest1.c 09c1c7d728ccf4feb9e481671e29dda5669bbcc2
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F test/createtab.test b5de160630b209c4b8925bdcbbaf48cc90b67fe8
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F test/cse.test 277350a26264495e86b1785f34d2d0c8600e021c
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F test/ctime.test 7bd009071e242aac4f18521581536b652b789a47
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F test/date.test a18a2ce81add84b17b06559e82ad7bb91bc6ddff
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F test/date.test f3228180c87bbe5d39c9397bf001c0095c3821b9
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F test/dbstatus.test 207e5b63fcb7b9c3bb8e1fdf38ebd4654ad0e54b
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F test/dbstatus2.test b1de8250fde1f3474d6b86f0e89de38d84794f56
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F test/default.test 6faf23ccb300114924353007795aa9a8ec0aa9dc
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@ -1006,7 +1006,10 @@ F tool/tostr.awk e75472c2f98dd76e06b8c9c1367f4ab07e122d06
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F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
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F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
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F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
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P 892b74116a3b23268895b96433d18ef00c1433d8
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R f92cf3b5f19c2cdf0a1f4043259e76e0
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P 699b792c6a0e989994549959b11ec1bfad8bbd92
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R 9adb61fbfc8a4b0255b08c19fe781f44
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T *branch * floating-point-conversions
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T *sym-floating-point-conversions *
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T -sym-trunk *
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U drh
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Z 37917877b4f7a2aac8f4f47ec8031274
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Z 93861bbc3afe941842927198b8f68ac0
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@ -1 +1 @@
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699b792c6a0e989994549959b11ec1bfad8bbd92
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8ecffca900cd6a8922001fd458a266ce8c83fb66
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13
src/func.c
13
src/func.c
@ -863,8 +863,19 @@ static void quoteFunc(sqlite3_context *context, int argc, sqlite3_value **argv){
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assert( argc==1 );
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UNUSED_PARAMETER(argc);
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switch( sqlite3_value_type(argv[0]) ){
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case SQLITE_INTEGER:
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case SQLITE_FLOAT: {
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double r1, r2;
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r1 = sqlite3_value_double(argv[0]);
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char zBuf[50];
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sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.15g", r1);
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sqlite3AtoF(zBuf, &r2, 20, SQLITE_UTF8);
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if( r1!=r2 ){
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sqlite3_snprintf(sizeof(zBuf), zBuf, "%!.20e", r1);
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}
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sqlite3_result_text(context, zBuf, -1, SQLITE_TRANSIENT);
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break;
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}
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case SQLITE_INTEGER: {
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sqlite3_result_value(context, argv[0]);
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break;
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}
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15
src/printf.c
15
src/printf.c
@ -124,7 +124,8 @@ static const et_info fmtinfo[] = {
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static char et_getdigit(LONGDOUBLE_TYPE *val, int *cnt){
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int digit;
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LONGDOUBLE_TYPE d;
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if( (*cnt)++ >= 16 ) return '0';
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if( (*cnt)<=0 ) return '0';
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(*cnt)--;
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digit = (int)*val;
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d = digit;
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digit += '0';
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@ -428,9 +429,11 @@ void sqlite3VXPrintf(
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break;
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}
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if( realvalue>0.0 ){
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while( realvalue>=1e32 && exp<=350 ){ realvalue *= 1e-32; exp+=32; }
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while( realvalue>=1e8 && exp<=350 ){ realvalue *= 1e-8; exp+=8; }
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while( realvalue>=10.0 && exp<=350 ){ realvalue *= 0.1; exp++; }
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LONGDOUBLE_TYPE scale = 1.0;
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while( realvalue>=1e64*scale && exp<=350 ){ scale *= 1e64; exp+=64; }
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while( realvalue>=1e8*scale && exp<=350 ){ scale *= 1e8; exp+=8; }
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while( realvalue>=10.0*scale && exp<=350 ){ scale *= 10.0; exp++; }
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realvalue /= scale;
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while( realvalue<1e-8 ){ realvalue *= 1e8; exp-=8; }
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while( realvalue<1.0 ){ realvalue *= 10.0; exp--; }
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if( exp>350 ){
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@ -463,7 +466,7 @@ void sqlite3VXPrintf(
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xtype = etFLOAT;
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}
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}else{
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flag_rtz = 0;
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flag_rtz = flag_altform2;
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}
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if( xtype==etEXP ){
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e2 = 0;
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@ -478,7 +481,7 @@ void sqlite3VXPrintf(
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}
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}
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zOut = bufpt;
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nsd = 0;
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nsd = 16 + flag_altform2*10;
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flag_dp = (precision>0 ?1:0) | flag_alternateform | flag_altform2;
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/* The sign in front of the number */
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if( prefix ){
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@ -17,10 +17,14 @@ source $testdir/tester.tcl
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expr srand(1)
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for {set i 1} {$i<10000} {incr i} {
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do_test 1.$i {
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set pow [expr {int((rand()-0.5)*100)}]
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set x [expr {pow((rand()-0.5)*2*rand(),$pow)}]
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set xf [format %.45e $x]
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set pow [expr {int((rand()-0.5)*100)}]
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set x [expr {pow((rand()-0.5)*2*rand(),$pow)}]
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set xf [format %.32e $x]
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# Verify that text->real conversions get exactly same ieee754 floating-
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# point value in SQLite as they do in TCL.
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#
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do_test 1.$i.1 {
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set y [db eval "SELECT $xf=\$x"]
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if {!$y} {
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puts -nonewline \173[db eval "SELECT real2hex($xf), real2hex(\$x)"]\175
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@ -30,6 +34,26 @@ for {set i 1} {$i<10000} {incr i} {
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}
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set y
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} {1}
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# FIX ME. The following tests (real->text->real round-trips) sometimes
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# fail for large floating-point values. Skip them for now...
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#
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if {abs($x)>1e50} continue
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# Verify that round-trip real->text->real conversions using the quote()
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# function preserve the bits of the numeric value exactly.
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#
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do_test 1.$i.2 {
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set y [db eval {SELECT $x=CAST(quote($x) AS real)}]
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if {!$y} {
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db eval {SELECT real2hex($x) a, real2hex(CAST(quote($x) AS real)) b} {}
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puts "\nIN: $a $xf"
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puts [format {QUOTE: %16s %s} {} [db eval {SELECT quote($x)}]]
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db eval {SELECT CAST(quote($x) AS real) c} {}
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puts "OUT: $b [format %.32e $c]"
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}
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set y
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} {1}
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}
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@ -151,7 +151,7 @@ datetest 3.2.1 {strftime('pre%fpost','2003-10-31 12:34:56.432')} pre56.432post
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datetest 3.2.2 {strftime('%f','2003-10-31 12:34:59.9999999')} 59.999
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datetest 3.3 {strftime('%H','2003-10-31 12:34:56.432')} 12
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datetest 3.4 {strftime('%j','2003-10-31 12:34:56.432')} 304
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datetest 3.5 {strftime('%J','2003-10-31 12:34:56.432')} 2452944.02426426
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datetest 3.5 {strftime('%J','2003-10-31 12:34:56.432')} 2452944.024264259
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datetest 3.6 {strftime('%m','2003-10-31 12:34:56.432')} 10
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datetest 3.7 {strftime('%M','2003-10-31 12:34:56.432')} 34
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datetest 3.8.1 {strftime('%s','2003-10-31 12:34:56.432')} 1067603696
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