Use only unsigned values in the implementatin of LIKE and GLOB so that

values won't overflow to negative when dealing with malformed UTF8.

FossilOrigin-Name: 77f01578bb565d1bc884b374b68bae10ce34a084

manifest

@@ -1,5 +1,5 @@
-C When\supdating\sa\sfield\sthat\srequires\sforeign\skey\sconstraints\sbe\schecked,\sensure\sthat\sthe\sindexes\sand\stables\sare\sconsistent\swhen\sthe\sFK\slogic\sis\srun.\sOtherwise,\sit\smay\sdetect\sthe\sinconsistency\sand\sreport\sdatabase\scorruption.
-D 2011-06-10T18:33:35.602
+C Use\sonly\sunsigned\svalues\sin\sthe\simplementatin\sof\sLIKE\sand\sGLOB\sso\sthat\nvalues\swon't\soverflow\sto\snegative\swhen\sdealing\swith\smalformed\sUTF8.
+D 2011-06-13T12:19:21.072
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 11dcc00a8d0e5202def00e81732784fb0cc4fe1d
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -134,7 +134,7 @@ F src/delete.c cecc926c70783452f3e8eb452c728291ce1a0b21
 F src/expr.c ab46ab0f0c44979a8164ca31728d7d10ae5e8106
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c 9fabba17a4d4778dc660f0cb9d781fc86d7b9d41
-F src/func.c b9117e40975245b8504cf3625d7e321d8d4b63dc
+F src/func.c d93772d9ffa51e4a8f275675bae1f61394c4ab80
 F src/global.c 29bfb85611dd816b04f10fba0ca910366e128d38
 F src/hash.c 458488dcc159c301b8e7686280ab209f1fb915af
 F src/hash.h 2894c932d84d9f892d4b4023a75e501f83050970
@@ -181,7 +181,7 @@ F src/select.c d9d440809025a58547e39f4f268c2a296bfb56ff
 F src/shell.c 0e0173b3e79d956368013e759f084caa7995ecb1
 F src/sqlite.h.in 2f51e4f58b2b4626fcbd9938580e730cb5fb4985
 F src/sqlite3ext.h c90bd5507099f62043832d73f6425d8d5c5da754
-F src/sqliteInt.h d2a9f6e06b85bb72a47cfe8d45320abe9cfa44f1
+F src/sqliteInt.h 7b7ec2394b94fc4516930cd9dae37af0f9312215
 F src/sqliteLimit.h 164b0e6749d31e0daa1a4589a169d31c0dec7b3d
 F src/status.c 7ac64842c86cec2fc1a1d0e5c16d3beb8ad332bf
 F src/table.c 2cd62736f845d82200acfa1287e33feb3c15d62e
@@ -233,7 +233,7 @@ F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
 F src/tokenize.c c819d9f72168a035d545a5bdafe9b085b20df705
 F src/trigger.c c836a6caac16ba96611558922106858f6ca3d6bf
 F src/update.c 80d77311d91ebc06b27149e75701f1b3e9356622
-F src/utf.c d83650c3ea08f7407bd9d0839d9885241c209c60
+F src/utf.c c53eb7404b3eb5c1cbb5655c6a7a0e0ce6bd50f0
 F src/util.c 0f33bbbdfcc4a2d8cf20c3b2a16ffc3b57c58a70
 F src/vacuum.c 05513dca036a1e7848fe18d5ed1265ac0b32365e
 F src/vdbe.c edfa3827d7a6fac2425bc10c0eb6e54342d2fa56
@@ -942,7 +942,7 @@ F tool/split-sqlite3c.tcl d9be87f1c340285a3e081eb19b4a247981ed290c
 F tool/symbols.sh bc2a3709940d47c8ac8e0a1fdf17ec801f015a00
 F tool/vdbe-compress.tcl d70ea6d8a19e3571d7ab8c9b75cba86d1173ff0f
 F tool/warnings.sh 347d974d143cf132f953b565fbc03026f19fcb4d
-P 442d8d8bfe443797482354ba8766d97d3d6acaae
-R dc98bce2b79b015d80463a3aa5591d5c
-U dan
-Z 8380c49075a7949acdc7a8820572b0c9
+P 2b3d9996a829c62fbaf7c92d50e44636340b07c6
+R 901f548a763eaba41771c9603ccfd6ef
+U drh
+Z 700a00fc01c336d2e1728d856de33900

manifest.uuid

@@ -1 +1 @@
-2b3d9996a829c62fbaf7c92d50e44636340b07c6
+77f01578bb565d1bc884b374b68bae10ce34a084

src/func.c

@@ -506,10 +506,10 @@ struct compareInfo {
 ** whereas only characters less than 0x80 do in ASCII.
 */
 #if defined(SQLITE_EBCDIC)
-# define sqlite3Utf8Read(A,C)    (*(A++))
-# define GlogUpperToLower(A)     A = sqlite3UpperToLower[A]
+# define sqlite3Utf8Read(A,C)  (*(A++))
+# define GlogUpperToLower(A)   A = sqlite3UpperToLower[A]
 #else
-# define GlogUpperToLower(A)     if( A<0x80 ){ A = sqlite3UpperToLower[A]; }
+# define GlogUpperToLower(A)   if( !((A)&~0x7f) ){ A = sqlite3UpperToLower[A]; }
 #endif
 
 static const struct compareInfo globInfo = { '*', '?', '[', 0 };
@@ -552,9 +552,9 @@ static int patternCompare(
   const u8 *zPattern,              /* The glob pattern */
   const u8 *zString,               /* The string to compare against the glob */
   const struct compareInfo *pInfo, /* Information about how to do the compare */
-  const int esc                    /* The escape character */
+  u32 esc                          /* The escape character */
 ){
-  int c, c2;
+  u32 c, c2;
   int invert;
   int seen;
   u8 matchOne = pInfo->matchOne;
@@ -684,7 +684,7 @@ static void likeFunc(
   sqlite3_value **argv
 ){
   const unsigned char *zA, *zB;
-  int escape = 0;
+  u32 escape = 0;
   int nPat;
   sqlite3 *db = sqlite3_context_db_handle(context);
 

src/sqliteInt.h

@@ -2879,7 +2879,7 @@ int sqlite3GetInt32(const char *, int*);
 int sqlite3Atoi(const char*);
 int sqlite3Utf16ByteLen(const void *pData, int nChar);
 int sqlite3Utf8CharLen(const char *pData, int nByte);
-int sqlite3Utf8Read(const u8*, const u8**);
+u32 sqlite3Utf8Read(const u8*, const u8**);
 
 /*
 ** Routines to read and write variable-length integers.  These used to

src/utf.c

@@ -163,7 +163,7 @@ static const unsigned char sqlite3Utf8Trans1[] = {
         || (c&0xFFFFF800)==0xD800                          \
         || (c&0xFFFFFFFE)==0xFFFE ){  c = 0xFFFD; }        \
   }
-int sqlite3Utf8Read(
+u32 sqlite3Utf8Read(
   const unsigned char *zIn,       /* First byte of UTF-8 character */
   const unsigned char **pzNext    /* Write first byte past UTF-8 char here */
 ){