lsame.c

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/* lapack/util/lsame.f -- translated by f2c (version 20050501).
   You must link the resulting object file with libf2c:
        on Microsoft Windows system, link with libf2c.lib;
        on Linux or Unix systems, link with .../path/to/libf2c.a -lm
        or, if you install libf2c.a in a standard place, with -lf2c -lm
        -- in that order, at the end of the command line, as in
                cc *.o -lf2c -lm
        Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,

                http://www.netlib.org/f2c/libf2c.zip
*/

#ifdef __cplusplus
extern "C" {
#endif
#include "v3p_netlib.h"

/*<       LOGICAL          FUNCTION LSAME( CA, CB ) >*/
logical lsame_(char *ca, char *cb, ftnlen ca_len, ftnlen cb_len)
{
    /* System generated locals */
    logical ret_val;

    /* Local variables */
    integer inta, intb, zcode;
    (void)ca_len;
    (void)cb_len;

/*  -- LAPACK auxiliary routine (version 3.0) -- */
/*     Univ. of Tennessee, Univ. of California Berkeley, NAG Ltd., */
/*     Courant Institute, Argonne National Lab, and Rice University */
/*     September 30, 1994 */

/*     .. 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 >*/
/*     .. */
/*     .. Executable Statements .. */

/*     Test if the characters are equal */

/*<       LSAME = CA.EQ.CB >*/
    ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
/*<    >*/
    if (ret_val) {
        return ret_val;
    }

/*     Now test for equivalence if both characters are alphabetic. */

/*<       ZCODE = ICHAR( 'Z' ) >*/
    zcode = '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 ) >*/
    inta = *(unsigned char *)ca;
/*<       INTB = ICHAR( CB ) >*/
    intb = *(unsigned char *)cb;

/*<       IF( ZCODE.EQ.90 .OR. ZCODE.EQ.122 ) THEN >*/
    if (zcode == 90 || zcode == 122) {

/*        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 (inta >= 97 && inta <= 122) {
            inta += -32;
        }
/*<          IF( INTB.GE.97 .AND. INTB.LE.122 ) INTB = INTB - 32 >*/
        if (intb >= 97 && intb <= 122) {
            intb += -32;
        }

/*<       ELSE IF( ZCODE.EQ.233 .OR. ZCODE.EQ.169 ) THEN >*/
    } else if (zcode == 233 || zcode == 169) {

/*        EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or */
/*        upper case 'Z'. */

/*<    >*/
        if ((inta >= 129 && inta <= 137) || (inta >= 145 && inta <= 153) || (inta 
                >= 162 && inta <= 169)) {
            inta += 64;
        }
/*<    >*/
        if ((intb >= 129 && intb <= 137) || (intb >= 145 && intb <= 153) || (intb 
                >= 162 && intb <= 169)) {
            intb += 64;
        }

/*<       ELSE IF( ZCODE.EQ.218 .OR. ZCODE.EQ.250 ) THEN >*/
    } else if (zcode == 218 || zcode == 250) {

/*        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 (inta >= 225 && inta <= 250) {
            inta += -32;
        }
/*<          IF( INTB.GE.225 .AND. INTB.LE.250 ) INTB = INTB - 32 >*/
        if (intb >= 225 && intb <= 250) {
            intb += -32;
        }
/*<       END IF >*/
    }
/*<       LSAME = INTA.EQ.INTB >*/
    ret_val = inta == intb;

/*     RETURN */

/*     End of LSAME */

/*<       END >*/
    return ret_val;
} /* lsame_ */

#ifdef __cplusplus
        }
#endif