| LOGICAL FUNCTION LSAME(CA,CB) |
| * |
| * -- LAPACK auxiliary routine (version 3.1) -- |
| * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. |
| * November 2006 |
| * |
| * .. Scalar Arguments .. |
| CHARACTER CA,CB |
| * .. |
| * |
| * Purpose |
| * ======= |
| * |
| * LSAME returns .TRUE. if CA is the same letter as CB regardless of |
| * case. |
| * |
| * Arguments |
| * ========= |
| * |
| * CA (input) CHARACTER*1 |
| * |
| * CB (input) CHARACTER*1 |
| * CA and CB specify the single characters to be compared. |
| * |
| * ===================================================================== |
| * |
| * .. Intrinsic Functions .. |
| INTRINSIC ICHAR |
| * .. |
| * .. Local Scalars .. |
| INTEGER INTA,INTB,ZCODE |
| * .. |
| * |
| * Test if the characters are equal |
| * |
| LSAME = CA .EQ. CB |
| IF (LSAME) RETURN |
| * |
| * Now test for equivalence if both characters are alphabetic. |
| * |
| ZCODE = ICHAR('Z') |
| * |
| * Use 'Z' rather than 'A' so that ASCII can be detected on Prime |
| * machines, on which ICHAR returns a value with bit 8 set. |
| * ICHAR('A') on Prime machines returns 193 which is the same as |
| * ICHAR('A') on an EBCDIC machine. |
| * |
| INTA = ICHAR(CA) |
| INTB = ICHAR(CB) |
| * |
| IF (ZCODE.EQ.90 .OR. ZCODE.EQ.122) THEN |
| * |
| * ASCII is assumed - ZCODE is the ASCII code of either lower or |
| * upper case 'Z'. |
| * |
| IF (INTA.GE.97 .AND. INTA.LE.122) INTA = INTA - 32 |
| IF (INTB.GE.97 .AND. INTB.LE.122) INTB = INTB - 32 |
| * |
| ELSE IF (ZCODE.EQ.233 .OR. ZCODE.EQ.169) THEN |
| * |
| * EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or |
| * upper case 'Z'. |
| * |
| IF (INTA.GE.129 .AND. INTA.LE.137 .OR. |
| + INTA.GE.145 .AND. INTA.LE.153 .OR. |
| + INTA.GE.162 .AND. INTA.LE.169) INTA = INTA + 64 |
| IF (INTB.GE.129 .AND. INTB.LE.137 .OR. |
| + INTB.GE.145 .AND. INTB.LE.153 .OR. |
| + INTB.GE.162 .AND. INTB.LE.169) INTB = INTB + 64 |
| * |
| ELSE IF (ZCODE.EQ.218 .OR. ZCODE.EQ.250) THEN |
| * |
| * ASCII is assumed, on Prime machines - ZCODE is the ASCII code |
| * plus 128 of either lower or upper case 'Z'. |
| * |
| IF (INTA.GE.225 .AND. INTA.LE.250) INTA = INTA - 32 |
| IF (INTB.GE.225 .AND. INTB.LE.250) INTB = INTB - 32 |
| END IF |
| LSAME = INTA .EQ. INTB |
| * |
| * RETURN |
| * |
| * End of LSAME |
| * |
| END |
