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Get the LIKE and GLOB operators working again on systems using the

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EBCDIC character set. (CVS 4597)

FossilOrigin-Name: 754298a74e3d889f3767daba058262613d20a601
This commit is contained in:
drh
2007-12-07 18:39:04 +00:00
parent 464fc33a82
commit b9175aed38
3 changed files with 26 additions and 13 deletions
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25
src/func.c
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@@ -16,7 +16,7 @@
** sqliteRegisterBuildinFunctions() found at the bottom of the file.
** All other code has file scope.
**
** $Id: func.c,v 1.177 2007/11/28 22:36:41 drh Exp $
** $Id: func.c,v 1.178 2007/12/07 18:39:05 drh Exp $
*/
#include "sqliteInt.h"
#include <ctype.h>
@@ -405,6 +405,19 @@ struct compareInfo {
u8 noCase;
};
/*
** For LIKE and GLOB matching on EBCDIC machines, assume that every
** character is exactly one byte in size. Also, all characters are
** able to participate in upper-case-to-lower-case mappings in EBCDIC
** whereas only characters less than 0x80 do in ASCII.
*/
#if defined(SQLITE_EBCDIC)
# define sqlite3Utf8Read(A,B,C) (*(A++))
# define UpperToLower(A) A = sqlite3UpperToLower[A]
#else
# define UpperToLower(A) if( A<0x80 ){ A = sqlite3UpperToLower[A]; }
#endif
static const struct compareInfo globInfo = { '*', '?', '[', 0 };
/* The correct SQL-92 behavior is for the LIKE operator to ignore
** case. Thus 'a' LIKE 'A' would be true. */
@@ -481,11 +494,11 @@ static int patternCompare(
}
while( (c2 = sqlite3Utf8Read(zString,0,&zString))!=0 ){
if( noCase ){
c2 = c2<0x80 ? sqlite3UpperToLower[c2] : c2;
c = c<0x80 ? sqlite3UpperToLower[c] : c;
UpperToLower(c2);
UpperToLower(c);
while( c2 != 0 && c2 != c ){
c2 = sqlite3Utf8Read(zString, 0, &zString);
if( c2<0x80 ) c2 = sqlite3UpperToLower[c2];
UpperToLower(c2);
}
}else{
while( c2 != 0 && c2 != c ){
@@ -537,8 +550,8 @@ static int patternCompare(
}else{
c2 = sqlite3Utf8Read(zString, 0, &zString);
if( noCase ){
c = c<0x80 ? sqlite3UpperToLower[c] : c;
c2 = c2<0x80 ? sqlite3UpperToLower[c2] : c2;
UpperToLower(c);
UpperToLower(c2);
}
if( c!=c2 ){
return 0;