LAPACK  3.10.0 LAPACK: Linear Algebra PACKage

## ◆ lsame()

 logical function lsame ( character CA, character CB )

LSAME

Purpose:
``` LSAME returns .TRUE. if CA is the same letter as CB regardless of
case.```
Parameters
 [in] CA ` CA is CHARACTER*1` [in] CB ``` CB is CHARACTER*1 CA and CB specify the single characters to be compared.```

Definition at line 52 of file lsame.f.

53 *
54 * -- Reference BLAS level1 routine --
55 * -- Reference BLAS is a software package provided by Univ. of Tennessee, --
56 * -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
57 *
58 * .. Scalar Arguments ..
59  CHARACTER CA,CB
60 * ..
61 *
62 * =====================================================================
63 *
64 * .. Intrinsic Functions ..
65  INTRINSIC ichar
66 * ..
67 * .. Local Scalars ..
68  INTEGER INTA,INTB,ZCODE
69 * ..
70 *
71 * Test if the characters are equal
72 *
73  lsame = ca .EQ. cb
74  IF (lsame) RETURN
75 *
76 * Now test for equivalence if both characters are alphabetic.
77 *
78  zcode = ichar('Z')
79 *
80 * Use 'Z' rather than 'A' so that ASCII can be detected on Prime
81 * machines, on which ICHAR returns a value with bit 8 set.
82 * ICHAR('A') on Prime machines returns 193 which is the same as
83 * ICHAR('A') on an EBCDIC machine.
84 *
85  inta = ichar(ca)
86  intb = ichar(cb)
87 *
88  IF (zcode.EQ.90 .OR. zcode.EQ.122) THEN
89 *
90 * ASCII is assumed - ZCODE is the ASCII code of either lower or
91 * upper case 'Z'.
92 *
93  IF (inta.GE.97 .AND. inta.LE.122) inta = inta - 32
94  IF (intb.GE.97 .AND. intb.LE.122) intb = intb - 32
95 *
96  ELSE IF (zcode.EQ.233 .OR. zcode.EQ.169) THEN
97 *
98 * EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or
99 * upper case 'Z'.
100 *
101  IF (inta.GE.129 .AND. inta.LE.137 .OR.
102  + inta.GE.145 .AND. inta.LE.153 .OR.
103  + inta.GE.162 .AND. inta.LE.169) inta = inta + 64
104  IF (intb.GE.129 .AND. intb.LE.137 .OR.
105  + intb.GE.145 .AND. intb.LE.153 .OR.
106  + intb.GE.162 .AND. intb.LE.169) intb = intb + 64
107 *
108  ELSE IF (zcode.EQ.218 .OR. zcode.EQ.250) THEN
109 *
110 * ASCII is assumed, on Prime machines - ZCODE is the ASCII code
111 * plus 128 of either lower or upper case 'Z'.
112 *
113  IF (inta.GE.225 .AND. inta.LE.250) inta = inta - 32
114  IF (intb.GE.225 .AND. intb.LE.250) intb = intb - 32
115  END IF
116  lsame = inta .EQ. intb
117 *
118 * RETURN
119 *
120 * End of LSAME
121 *
logical function lsame(CA, CB)
LSAME
Definition: lsame.f:53