Fix a problem in sqldiff virtual table hanlding to do with tab and other non-space whitespace characters in the CREATE VIRTUAL TABLE statement.

FossilOrigin-Name: 1737e4fdfc9a3628415b234338a68a64cbbaadb23598517761e571ab7ed7ad14

ext/rbu/rbudiff.test

@@ -268,6 +268,14 @@ tablE t1 USING FTs5(c);
       DELETE FROM t1 WHERE rowid = 1;
       INSERT INTO t1 VALUES('a b c');
     }
+    4 {
+      creAte virTUal tablE	t1	USING FTs5(c);
+      INSERT INTO t1 VALUES('a b c');
+      INSERT INTO t1 VALUES('a b c');
+    } {
+      DELETE FROM t1 WHERE rowid = 1;
+      INSERT INTO t1 VALUES('a b c');
+    }
 
   } {
     forcedelete test.db test.db2

manifest

@@ -1,5 +1,5 @@
-C Date/time\sfunctions\swith\sno\sarguments\s(ex:\sdate()\sor\stime())\sshould\sbe\nnon-deterministic.\s\sFix\sfor\sticket\s[2c6c8689fb5f3d2f].
-D 2021-03-16T18:41:20.462
+C Fix\sa\sproblem\sin\ssqldiff\svirtual\stable\shanlding\sto\sdo\swith\stab\sand\sother\snon-space\swhitespace\scharacters\sin\sthe\sCREATE\sVIRTUAL\sTABLE\sstatement.
+D 2021-03-17T11:25:42.193
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -359,7 +359,7 @@ F ext/rbu/rbu_common.tcl 60d904133ff843fe72cc0514e9dd2486707181e6e0fbab20979da28
 F ext/rbu/rbucollate.test cac528a9a46318cba42e61258bb42660bbbf4fdb9a8c863de5a54ad0c658d197
 F ext/rbu/rbucrash.test 000981a1fe8a6e4d9a684232f6a129e66a3ef595f5ed74655e2f9c68ffa613b4
 F ext/rbu/rbucrash2.test efa143cc94228eb0266d3f1abfbee60a5838a84cef7cc3fcb8c145b74d96fd41
-F ext/rbu/rbudiff.test 156957851136b63c143478518dc1bda6c832103cdbe8ac1d7cdd47edb3cbe0a3
+F ext/rbu/rbudiff.test abe895a8d479e4d33acb40e244e3d8e2cd25f55a18dfa8b9f83e13d00073f600
 F ext/rbu/rbudor.test e3e8623926012f43eebe51fedf06a102df2640750d971596b052495f2536db20
 F ext/rbu/rbuexpr.test 10d0420537c3bc7666e576d72adeffe7e86cfbb00dcc30aa9ce096c042415190
 F ext/rbu/rbufault.test 2d7f567b79d558f6e093c58808cab4354f8a174e3802f69e7790a9689b3c09f8
@@ -1875,7 +1875,7 @@ F tool/speedtest2.tcl ee2149167303ba8e95af97873c575c3e0fab58ff
 F tool/speedtest8.c 2902c46588c40b55661e471d7a86e4dd71a18224
 F tool/speedtest8inst1.c 7ce07da76b5e745783e703a834417d725b7d45fd
 F tool/split-sqlite3c.tcl 3efcd4240b738f6bb2b5af0aea7e1e0ef9bc1c61654f645076cec883030b710c
-F tool/sqldiff.c 4151108387cb56c08906e5ac8d6a353dcfe8fc6014eeded0f0910e2230ea0f5b
+F tool/sqldiff.c 21226ef092ec1e543b237c5d3d2d32d344a60f2437eadfea04f65b348fbd00e4
 F tool/sqlite3_analyzer.c.in 7eeaae8b0d7577662acaabbb11107af0659d1b41bc1dfdd4d91422de27127968
 F tool/sqltclsh.c.in 1bcc2e9da58fadf17b0bf6a50e68c1159e602ce057210b655d50bad5aaaef898
 F tool/sqltclsh.tcl 862f4cf1418df5e1315b5db3b5ebe88969e2a784525af5fbf9596592f14ed848
@@ -1910,7 +1910,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 7a211b3f09b17b758ac43c3ed14e3f90c55459077412a57baca0f7cadff47fbf
-R dd9db537d7438077a73654ea2cdef93c
-U drh
-Z 52a4ccdcc1c4ac4a8964e528ecbca892
+P 1734c332e7f609769fc30f82cf7af097c2964e08900ee3e297f6a25e6df60555
+R 83313da3f8929ffe9d0ca9cc05a1ce38
+U dan
+Z d615638e73fe2252aa958c3bc8bb6a2b

manifest.uuid

@@ -1 +1 @@
-1734c332e7f609769fc30f82cf7af097c2964e08900ee3e297f6a25e6df60555
+1737e4fdfc9a3628415b234338a68a64cbbaadb23598517761e571ab7ed7ad14

tool/sqldiff.c

@@ -1712,20 +1712,28 @@ end_changeset_one_table:
   strFree(&sql);
 }
 
+/*
+** Return true if the ascii character passed as the only argument is a
+** whitespace character. Otherwise return false.
+*/
+static int is_whitespace(char x){
+  return (x==' ' || x=='\t' || x=='\n' || x=='\r');
+}
+
 /*
 ** Extract the next SQL keyword or quoted string from buffer zIn and copy it
 ** (or a prefix of it if it will not fit) into buffer zBuf, size nBuf bytes.
 ** Return a pointer to the character within zIn immediately following 
 ** the token or quoted string just extracted.
 */
-const char *gobble_token(const char *zIn, char *zBuf, int nBuf){
+static const char *gobble_token(const char *zIn, char *zBuf, int nBuf){
   const char *p = zIn;
   char *pOut = zBuf;
   char *pEnd = &pOut[nBuf-1];
   char q = 0;                     /* quote character, if any */
 
   if( p==0 ) return 0;
-  while( *p==' ' ) p++;
+  while( is_whitespace(*p) ) p++;
   switch( *p ){
     case '"': q = '"'; break;
     case '\'': q = '\''; break;
@@ -1744,7 +1752,7 @@ const char *gobble_token(const char *zIn, char *zBuf, int nBuf){
       p++;
     }
   }else{
-    while( *p && *p!=' ' && *p!='(' ){
+    while( *p && !is_whitespace(*p) && *p!='(' ){
       if( pOut<pEnd ) *pOut++ = *p;
       p++;
     }