source: pacpussensors/trunk/Vislab/lib3dv-1.2.0/lib3dv/eigen/blas/lsame.f

Last change on this file was 136, checked in by ldecherf, 8 years ago

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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
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