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