Avoid a potentially large strlen() in sqlite3DecOrHexToI64().

FossilOrigin-Name: 5413b02bb629b9cbb76f7e688e94ebcf24276c01436d3feb73ff57c036e1d2aa

manifest

@@ -1,5 +1,5 @@
-C Further\simprovements\sto\slarge\sstring\shandling\sin\srelation\sto\sJSON.
-D 2023-07-21T18:09:07.505
+C Avoid\sa\spotentially\slarge\sstrlen()\sin\ssqlite3DecOrHexToI64().
+D 2023-07-21T18:38:59.114
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -705,7 +705,7 @@ F src/trigger.c ad6ab9452715fa9a8075442e15196022275b414b9141b566af8cdb7a1605f2b0
 F src/update.c 0aa36561167a7c40d01163238c297297962f31a15a8d742216b3c37cdf25f731
 F src/upsert.c 5303dc6c518fa7d4b280ec65170f465c7a70b7ac2b22491598f6d0b4875b3145
 F src/utf.c ee39565f0843775cc2c81135751ddd93eceb91a673ea2c57f61c76f288b041a0
-F src/util.c fea6fffdee3cdae917a66b70deec59d4f238057cfd6de623d15cf990c196940d
+F src/util.c c2aa170f2eb429235b1dddce8952770787ffa5124dc89d405bfbe8ebad8e7ebd
 F src/vacuum.c 604fcdaebe76f3497c855afcbf91b8fa5046b32de3045bab89cc008d68e40104
 F src/vdbe.c 4cda877d413a18fa07346b08d6959b3d18ce982357921e7acb9649fca2534a12
 F src/vdbe.h 41485521f68e9437fdb7ec4a90f9d86ab294e9bb8281e33b235915e29122cfc0
@@ -2043,8 +2043,8 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 75cc3c89ee2dcfefa9421ce60bee77e85d2895918e8c5cfd05c434f8932a99b5
-R b0bbcf196bde05ae8f599a4f16022c78
+P 1e5df0aa3dae5cadbf1d07c718ae2a5212543300b68e49d35e8c96855a7f619c
+R 985a846b4f2b586d366fd130e337d17a
 U drh
-Z 8dfc9dc2f2e2752cbadaab8d45cf08cb
+Z f082f5b7a15300eec42c5fbe873f6275
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-1e5df0aa3dae5cadbf1d07c718ae2a5212543300b68e49d35e8c96855a7f619c
+5413b02bb629b9cbb76f7e688e94ebcf24276c01436d3feb73ff57c036e1d2aa

src/util.c

@@ -846,7 +846,9 @@ int sqlite3DecOrHexToI64(const char *z, i64 *pOut){
   }else
 #endif /* SQLITE_OMIT_HEX_INTEGER */
   {
-    return sqlite3Atoi64(z, pOut, sqlite3Strlen30(z), SQLITE_UTF8);
+    int n = (int)(0x3fffffff&strspn(z,"+- \n\t0123456789"));
+    if( z[n] ) n++;
+    return sqlite3Atoi64(z, pOut, n, SQLITE_UTF8);
   }
 }