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

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

FossilOrigin-Name: 77f01578bb565d1bc884b374b68bae10ce34a084
This commit is contained in:
drh
2011-06-13 12:19:21 +00:00
parent 7006c18e00
commit 0a32fa6d81
5 changed files with 18 additions and 18 deletions
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12
src/func.c
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@@ -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);