root / src / lapack / util / lsame.f @ 1
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| 1 | 1 | equemene | LOGICAL FUNCTION LSAME( CA, CB ) |
|---|---|---|---|
| 2 | 1 | equemene | * |
| 3 | 1 | equemene | * -- LAPACK auxiliary routine (version 3.1) -- |
| 4 | 1 | equemene | * Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. |
| 5 | 1 | equemene | * November 2006 |
| 6 | 1 | equemene | * |
| 7 | 1 | equemene | * .. Scalar Arguments .. |
| 8 | 1 | equemene | CHARACTER CA, CB |
| 9 | 1 | equemene | * .. |
| 10 | 1 | equemene | * |
| 11 | 1 | equemene | * Purpose |
| 12 | 1 | equemene | * ======= |
| 13 | 1 | equemene | * |
| 14 | 1 | equemene | * LSAME returns .TRUE. if CA is the same letter as CB regardless of |
| 15 | 1 | equemene | * case. |
| 16 | 1 | equemene | * |
| 17 | 1 | equemene | * Arguments |
| 18 | 1 | equemene | * ========= |
| 19 | 1 | equemene | * |
| 20 | 1 | equemene | * CA (input) CHARACTER*1 |
| 21 | 1 | equemene | * CB (input) CHARACTER*1 |
| 22 | 1 | equemene | * CA and CB specify the single characters to be compared. |
| 23 | 1 | equemene | * |
| 24 | 1 | equemene | * ===================================================================== |
| 25 | 1 | equemene | * |
| 26 | 1 | equemene | * .. Intrinsic Functions .. |
| 27 | 1 | equemene | INTRINSIC ICHAR |
| 28 | 1 | equemene | * .. |
| 29 | 1 | equemene | * .. Local Scalars .. |
| 30 | 1 | equemene | INTEGER INTA, INTB, ZCODE |
| 31 | 1 | equemene | * .. |
| 32 | 1 | equemene | * .. Executable Statements .. |
| 33 | 1 | equemene | * |
| 34 | 1 | equemene | * Test if the characters are equal |
| 35 | 1 | equemene | * |
| 36 | 1 | equemene | LSAME = CA.EQ.CB |
| 37 | 1 | equemene | IF( LSAME ) |
| 38 | 1 | equemene | $ RETURN |
| 39 | 1 | equemene | * |
| 40 | 1 | equemene | * Now test for equivalence if both characters are alphabetic. |
| 41 | 1 | equemene | * |
| 42 | 1 | equemene | ZCODE = ICHAR( 'Z' ) |
| 43 | 1 | equemene | * |
| 44 | 1 | equemene | * Use 'Z' rather than 'A' so that ASCII can be detected on Prime |
| 45 | 1 | equemene | * machines, on which ICHAR returns a value with bit 8 set. |
| 46 | 1 | equemene | * ICHAR('A') on Prime machines returns 193 which is the same as
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| 47 | 1 | equemene | * ICHAR('A') on an EBCDIC machine.
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| 48 | 1 | equemene | * |
| 49 | 1 | equemene | INTA = ICHAR( CA ) |
| 50 | 1 | equemene | INTB = ICHAR( CB ) |
| 51 | 1 | equemene | * |
| 52 | 1 | equemene | IF( ZCODE.EQ.90 .OR. ZCODE.EQ.122 ) THEN |
| 53 | 1 | equemene | * |
| 54 | 1 | equemene | * ASCII is assumed - ZCODE is the ASCII code of either lower or |
| 55 | 1 | equemene | * upper case 'Z'. |
| 56 | 1 | equemene | * |
| 57 | 1 | equemene | IF( INTA.GE.97 .AND. INTA.LE.122 ) INTA = INTA - 32 |
| 58 | 1 | equemene | IF( INTB.GE.97 .AND. INTB.LE.122 ) INTB = INTB - 32 |
| 59 | 1 | equemene | * |
| 60 | 1 | equemene | ELSE IF( ZCODE.EQ.233 .OR. ZCODE.EQ.169 ) THEN |
| 61 | 1 | equemene | * |
| 62 | 1 | equemene | * EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or |
| 63 | 1 | equemene | * upper case 'Z'. |
| 64 | 1 | equemene | * |
| 65 | 1 | equemene | IF( INTA.GE.129 .AND. INTA.LE.137 .OR. |
| 66 | 1 | equemene | $ INTA.GE.145 .AND. INTA.LE.153 .OR. |
| 67 | 1 | equemene | $ INTA.GE.162 .AND. INTA.LE.169 ) INTA = INTA + 64 |
| 68 | 1 | equemene | IF( INTB.GE.129 .AND. INTB.LE.137 .OR. |
| 69 | 1 | equemene | $ INTB.GE.145 .AND. INTB.LE.153 .OR. |
| 70 | 1 | equemene | $ INTB.GE.162 .AND. INTB.LE.169 ) INTB = INTB + 64 |
| 71 | 1 | equemene | * |
| 72 | 1 | equemene | ELSE IF( ZCODE.EQ.218 .OR. ZCODE.EQ.250 ) THEN |
| 73 | 1 | equemene | * |
| 74 | 1 | equemene | * ASCII is assumed, on Prime machines - ZCODE is the ASCII code |
| 75 | 1 | equemene | * plus 128 of either lower or upper case 'Z'. |
| 76 | 1 | equemene | * |
| 77 | 1 | equemene | IF( INTA.GE.225 .AND. INTA.LE.250 ) INTA = INTA - 32 |
| 78 | 1 | equemene | IF( INTB.GE.225 .AND. INTB.LE.250 ) INTB = INTB - 32 |
| 79 | 1 | equemene | END IF |
| 80 | 1 | equemene | LSAME = INTA.EQ.INTB |
| 81 | 1 | equemene | * |
| 82 | 1 | equemene | * RETURN |
| 83 | 1 | equemene | * |
| 84 | 1 | equemene | * End of LSAME |
| 85 | 1 | equemene | * |
| 86 | 1 | equemene | END |