Fix rounding in zero-precision %f and %g printf conversions.

[forum:/info/393708f4a8|Forum post 393708f4a8].  This bug was
introduced by check-in [32befb224b254639] and first appeared in version 3.43.0.

FossilOrigin-Name: 7fca1bc482fc2456d75392eb42f768fda72631c9070de46b8123b1126e78306f

5 files changed, 28 insertions, 10 deletions

diff --git a/manifest b/manifest
index 8a1169a17..ab0f22bde 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Fix\sthe\ssubtype\son\sthe\svalue\scolumn\sfrom\sjson_each/json_tree\sfor\scases\nwhen\sthe\svalue\sis\san\sarray\sor\sobject.\s\sFix\sfor\sthe\sbug\sreported\sby\n[forum:/forumpost/ecb94cd210|forum\spost\secb94cd210].
-D 2024-02-16T21:30:08.580
+C Fix\srounding\sin\szero-precision\s%f\sand\s%g\sprintf\sconversions.\n[forum:/info/393708f4a8|Forum\spost\s393708f4a8].\s\sThis\sbug\swas\nintroduced\sby\scheck-in\s[32befb224b254639]\sand\sfirst\sappeared\sin\sversion\s3.43.0.
+D 2024-02-17T03:32:31.878
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -735,7 +735,7 @@ F src/pcache1.c 602acb23c471bb8d557a6f0083cc2be641d6cafcafa19e481eba7ef4c9ca0f00
 F src/pragma.c 24584cc928538426e047db670f21f3816286812e48dfd391a40e788f14d3cea2
 F src/pragma.h e690a356c18e98414d2e870ea791c1be1545a714ba623719deb63f7f226d8bb7
 F src/prepare.c 371f6115cb69286ebc12c6f2d7511279c2e47d9f54f475d46a554d687a3b312c
-F src/printf.c 18fbdf028345c8fbe6044f5f5bfda5a10d48d6287afef088cc21b0ca57985640
+F src/printf.c d3392b2a20ee314ddeef34fb43c904bf4619eb20ff9a9e07e3950a7e4dcd6912
 F src/random.c 606b00941a1d7dd09c381d3279a058d771f406c5213c9932bbd93d5587be4b9c
 F src/resolve.c d77c6160bc8f249c2196fdd3e75f66a1dd70e37aa25c39aedc7b1f93c42b7c6d
 F src/rowset.c 8432130e6c344b3401a8874c3cb49fefe6873fec593294de077afea2dce5ec97
@@ -807,7 +807,7 @@ F src/trigger.c 0905b96b04bb6658509f711a8207287f1315cdbc3df1a1b13ba6483c8e341c81
 F src/update.c 6904814dd62a7a93bbb86d9f1419c7f134a9119582645854ab02b36b676d9f92
 F src/upsert.c fa125a8d3410ce9a97b02cb50f7ae68a2476c405c76aa692d3acf6b8586e9242
 F src/utf.c f23165685a67b4caf8ec08fb274cb3f319103decfb2a980b7cfd55d18dfa855e
-F src/util.c 078f040366d5bd5f47658d045f901c768c1c636c6eaea121f3a1cbd63c3edb5b
+F src/util.c 3ed7ded64ecc8670acdcbb72e8df9b0a58845cb0c36639573eb0d5155121901a
 F src/vacuum.c 604fcdaebe76f3497c855afcbf91b8fa5046b32de3045bab89cc008d68e40104
 F src/vdbe.c dd340f5add924a8397401f7fe4faf2304ffd49ab5853d32ffc1736093b9c5080
 F src/vdbe.h 88e19a982df9027ec1c177c793d1a5d34dc23d8f06e3b2d997f43688b05ee0eb
@@ -1489,7 +1489,7 @@ F test/pragma4.test ca5e4dfc46adfe490f75d73734f70349d95a199e6510973899e502eef2c8
 F test/pragma5.test 7b33fc43e2e41abf17f35fb73f71b49671a380ea92a6c94b6ce530a25f8d9102
 F test/pragmafault.test 275edaf3161771d37de60e5c2b412627ac94cef11739236bec12ed1258b240f8
 F test/prefixes.test b524a1c44bffec225b9aec98bd728480352aa8532ac4c15771fb85e8beef65d9
-F test/printf.test 512152dca7f2f578f045a5a732e7bee08e4f47a8a212f83ce46791b518eba70f
+F test/printf.test 685fec5a0c5af2490ab0632775a301554361d674211d690f5bee0a97b05333de
 F test/printf2.test 3f55c1871a5a65507416076f6eb97e738d5210aeda7595a74ee895f2224cce60
 F test/progress.test ebab27f670bd0d4eb9d20d49cef96e68141d92fb
 F test/ptrchng.test ef1aa72d6cf35a2bbd0869a649b744e9d84977fc
@@ -2162,8 +2162,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 670174916c660b24ba70e96a42984eb65ee52da50e9828bdeca4c9ff4bf92e20
-R e9613550f9ab9d1defe8fcc96e4778a1
+P 1c33c5db2e05019d1a375109f79ad8588a3c17f81e4f4b8d66c880c3c860e87e
+R e3e534a124d08ab0760f858683268942
 U drh
-Z a380dd04602de7f2ac17d4bbe29cc262
+Z 25ef9b1be0189ee473aa53bd8732a56c
 # Remove this line to create a well-formed Fossil manifest.
diff --git a/manifest.uuid b/manifest.uuid
index b30f95cb8..1e28ec46d 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-1c33c5db2e05019d1a375109f79ad8588a3c17f81e4f4b8d66c880c3c860e87e
\ No newline at end of file
+7fca1bc482fc2456d75392eb42f768fda72631c9070de46b8123b1126e78306f
\ No newline at end of file
diff --git a/src/printf.c b/src/printf.c
index c6b3803ca..2e09431bf 100644
--- a/src/printf.c
+++ b/src/printf.c
@@ -498,6 +498,7 @@ void sqlite3_str_vappendf(
         if( xtype==etFLOAT ){
           iRound = -precision;
         }else if( xtype==etGENERIC ){
+          if( precision==0 ) precision = 1;
           iRound = precision;
         }else{
           iRound = precision+1;
diff --git a/src/util.c b/src/util.c
index 207b901ba..4aa82d063 100644
--- a/src/util.c
+++ b/src/util.c
@@ -1069,7 +1069,7 @@ void sqlite3FpDecode(FpDecode *p, double r, int iRound, int mxRound){
   assert( p->n>0 );
   assert( p->n<sizeof(p->zBuf) );
   p->iDP = p->n + exp;
-  if( iRound<0 ){
+  if( iRound<=0 ){
     iRound = p->iDP - iRound;
     if( iRound==0 && p->zBuf[i+1]>='5' ){
       iRound = 1;
diff --git a/test/printf.test b/test/printf.test
index 6d4ad71d2..cc439e617 100644
--- a/test/printf.test
+++ b/test/printf.test
@@ -3833,4 +3833,21 @@ do_execsql_test printf-18.1 {
   SELECT length( format('%,.249f', -5.0e-300) );
 } {252}
 
+# 2024-02-16
+# https://sqlite.org/forum/info/393708f4a8
+#
+# The problem introduced by on 2023-07-03 by
+# https://sqlite.org/src/info/32befb224b254639
+#
+do_execsql_test printf-19.1 {
+  SELECT format('%0.0f %0.0g %0.0g', 0.9, 0.09, 1.9);
+} {{1 0.09 2}}
+do_execsql_test printf-19.2 {
+  SELECT format('%0.0f %#0.0f',0.0, 0.0);
+} {{0 0.}}
+do_execsql_test printf-19.3 {
+  SELECT format('%,.0f %,.0f',12345e+10, 12345e+11);
+} {{123,450,000,000,000 1,234,500,000,000,000}}
+
+
 finish_test