Slight increase in the accuracy of log10().

FossilOrigin-Name: c48a735bd4a1dbd541aed5937c25fc0c606c4263d8ee94cae30a06b1a7b26d9a

manifest

@@ -1,5 +1,5 @@
-C Do\snot\sallow\sthe\sright\soperand\sof\sa\sRIGHT\sJOIN\sto\sbe\sreordered\swith\sother\nFROM\sclause\sterms\sthat\sare\seven\sfurther\sto\sthe\sright.\s\sFix\sfor\sthe\sissue\nidentified\sby\s[forum:/forumpost/5cfe08eed6|forum\spost\s5cfe08eed6].
-D 2022-05-25T12:49:59.232
+C Slight\sincrease\sin\sthe\saccuracy\sof\slog10().
+D 2022-05-25T13:10:29.282
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -521,7 +521,7 @@ F src/delete.c a8e844af211a48b13b5b358be77a12c860c6a557c21990ad51a548e2536500ce
 F src/expr.c 19507ae3244402860cac2944be3b92bf9a8b50212fbfabaf7e9817127fec7c00
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c d965ede15d8360c09ed59348940649ee647b192e784466837d7aefa836d1d91e
-F src/func.c a3407a6fbb0d4088d8d502e46f0ace63e0aeae7467ae23a9ca9815bbf9239761
+F src/func.c 41bf487f04d54e694baf84baacff7de621847fd7e89a35b776d5fb9ade772ff7
 F src/global.c e83ee571b79ee3adc32e380cf554cf1254bc43763d23786c71721fbcdfbbb965
 F src/hash.c 8d7dda241d0ebdafb6ffdeda3149a412d7df75102cecfc1021c98d6219823b19
 F src/hash.h 3340ab6e1d13e725571d7cee6d3e3135f0779a7d8e76a9ce0a85971fa3953c51
@@ -1072,7 +1072,7 @@ F test/func3.test 600a632c305a88f3946d38f9a51efe145c989b2e13bd2b2a488db47fe76bab
 F test/func4.test 2285fb5792d593fef442358763f0fd9de806eda47dbc7a5934df57ffdc484c31
 F test/func5.test 863e6d1bd0013d09c17236f8a13ea34008dd857d87d85a13a673960e4c25d82a
 F test/func6.test 9cc9b1f43b435af34fe1416eb1e318c8920448ea7a6962f2121972f5215cb9b0
-F test/func7.test b9e2a1a30a8562b00841b4a21a5d2d81754fa3ab99275fd71fd5279287b44b1c
+F test/func7.test adbfc910385a6ffd15dc47be3c619ef070c542fcb7488964badb17b2d9a4d080
 F test/fuzz-oss1.test 514dcabb24687818ea949fa6760229eaacad74ca70157743ef36d35bbe01ffb0
 F test/fuzz.test 4608c1310cff4c3014a84bcced6278139743e080046e5f6784b0de7b069371d8
 F test/fuzz2.test 76dc35b32b6d6f965259508508abce75a6c4d7e1
@@ -1969,8 +1969,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 18b5cea0392a28f694b8931a80e93518f8d3d297d787fa44d1544e373f76838e
-R 8e650f107a80285980558729e468cb90
+P 4be0c60e38edc5d5bfd72bb35a3c91c55240b4e6313a40614beb60f1ab9d9f4c
+R 1c6e1432c4284eb2e687e5d9d74723a1
 U drh
-Z 6af0bc21d075a0c1811a0f8f9fd1d30b
+Z 42ab2d62436fdafee99e49f2f11c2914
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-4be0c60e38edc5d5bfd72bb35a3c91c55240b4e6313a40614beb60f1ab9d9f4c
+c48a735bd4a1dbd541aed5937c25fc0c606c4263d8ee94cae30a06b1a7b26d9a

src/func.c

@@ -2098,11 +2098,11 @@ static void logFunc(
     switch( SQLITE_PTR_TO_INT(sqlite3_user_data(context)) ){
       case 1:
         /* Convert from natural logarithm to log base 10 */
-        ans *= 1.0/M_LN10;
+        ans /= M_LN10;
         break;
       case 2:
         /* Convert from natural logarithm to log base 2 */
-        ans *= 1.0/M_LN2;
+        ans /= M_LN2;
         break;
       default:
         break;

test/func7.test

@@ -60,6 +60,12 @@ do_execsql_test func7-pg-170 {
 do_execsql_test func7-pg-180 {
   SELECT log10(1000.0)
 } {3.0}
+do_execsql_test func7-pg-181 {
+  SELECT format('%.30f', log10(100.0) );
+} {2.000000000000000000000000000000}
+do_execsql_test func7-pg-182 {
+  SELECT format('%.30f', ln(exp(2.0)) );
+} {2.000000000000000000000000000000}
 do_execsql_test func7-pg-190 {
   SELECT log(2.0, 64.0)
 } {6.0}