Performance enhancement to sqlite3_snprintf().

FossilOrigin-Name: c53dca7fadd81ea340fef776373cbb122c9ccd46

manifest

@@ -1,5 +1,5 @@
-C Performance\simprovement\sin\ssqlite3StrAccumFinish()\sfor\sthe\scommon\scase\swhere\nno\smemory\sallocation\sis\srequired.
-D 2016-11-25T15:11:26.619
+C Performance\senhancement\sto\ssqlite3_snprintf().
+D 2016-11-25T15:47:53.375
 F Makefile.in 6b572807415d3f0a379cebc9461416d8df4a12c8
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc bb4d970894abbbe0e88d00aac29bd52af8bc95f4
@@ -383,7 +383,7 @@ F src/pcache1.c e3967219b2a92b9edcb9324a4ba75009090d3953
 F src/pragma.c d932ba278654617cdd281f88a790a3185fca7c44
 F src/pragma.h 64c78a648751b9f4f297276c4eb7507b14b4628c
 F src/prepare.c b1140c3d0cf59bc85ace00ce363153041b424b7a
-F src/printf.c 8a76e8e9b44a282bd78f5a4113e4dec233c3dfff
+F src/printf.c f94da4935d1dd25420ac50c6745db1deb35e07c1
 F src/random.c ba2679f80ec82c4190062d756f22d0c358180696
 F src/resolve.c bb070cf5f23611c44ab7e4788803684e385fc3fb
 F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
@@ -1534,7 +1534,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 6df7c5747e0247b14bf015ef4320ddcf6fccf694
-R 52321675b69054515968315ac6e47ed5
+P b6acf5d4ef016326a079463e70e71c2fc95a352d
+R 66214ce5c9237cac8843327752704c96
 U drh
-Z 9d212a5ec3719e9483eacdb11891359b
+Z 00ed6ef21d5c142098e92d37ff95081c

manifest.uuid

@@ -1 +1 @@
-b6acf5d4ef016326a079463e70e71c2fc95a352d
+c53dca7fadd81ea340fef776373cbb122c9ccd46

src/printf.c

@@ -1017,7 +1017,8 @@ char *sqlite3_vsnprintf(int n, char *zBuf, const char *zFormat, va_list ap){
 #endif
   sqlite3StrAccumInit(&acc, 0, zBuf, n, 0);
   sqlite3VXPrintf(&acc, zFormat, ap);
-  return sqlite3StrAccumFinish(&acc);
+  zBuf[acc.nChar] = 0;
+  return zBuf;
 }
 char *sqlite3_snprintf(int n, char *zBuf, const char *zFormat, ...){
   char *z;