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      1 /* lsame.f -- translated by f2c (version 20100827).
      2    You must link the resulting object file with libf2c:
      3 	on Microsoft Windows system, link with libf2c.lib;
      4 	on Linux or Unix systems, link with .../path/to/libf2c.a -lm
      5 	or, if you install libf2c.a in a standard place, with -lf2c -lm
      6 	-- in that order, at the end of the command line, as in
      7 		cc *.o -lf2c -lm
      8 	Source for libf2c is in /netlib/f2c/libf2c.zip, e.g.,
      9 
     10 		http://www.netlib.org/f2c/libf2c.zip
     11 */
     12 
     13 #include "datatypes.h"
     14 
     15 logical lsame_(char *ca, char *cb, ftnlen ca_len, ftnlen cb_len)
     16 {
     17     /* System generated locals */
     18     logical ret_val;
     19 
     20     /* Local variables */
     21     integer inta, intb, zcode;
     22 
     23 
     24 /*  -- LAPACK auxiliary routine (version 3.1) -- */
     25 /*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
     26 /*     November 2006 */
     27 
     28 /*     .. Scalar Arguments .. */
     29 /*     .. */
     30 
     31 /*  Purpose */
     32 /*  ======= */
     33 
     34 /*  LSAME returns .TRUE. if CA is the same letter as CB regardless of */
     35 /*  case. */
     36 
     37 /*  Arguments */
     38 /*  ========= */
     39 
     40 /*  CA      (input) CHARACTER*1 */
     41 
     42 /*  CB      (input) CHARACTER*1 */
     43 /*          CA and CB specify the single characters to be compared. */
     44 
     45 /* ===================================================================== */
     46 
     47 /*     .. Intrinsic Functions .. */
     48 /*     .. */
     49 /*     .. Local Scalars .. */
     50 /*     .. */
     51 
     52 /*     Test if the characters are equal */
     53 
     54     ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
     55     if (ret_val) {
     56 	return ret_val;
     57     }
     58 
     59 /*     Now test for equivalence if both characters are alphabetic. */
     60 
     61     zcode = 'Z';
     62 
     63 /*     Use 'Z' rather than 'A' so that ASCII can be detected on Prime */
     64 /*     machines, on which ICHAR returns a value with bit 8 set. */
     65 /*     ICHAR('A') on Prime machines returns 193 which is the same as */
     66 /*     ICHAR('A') on an EBCDIC machine. */
     67 
     68     inta = *(unsigned char *)ca;
     69     intb = *(unsigned char *)cb;
     70 
     71     if (zcode == 90 || zcode == 122) {
     72 
     73 /*        ASCII is assumed - ZCODE is the ASCII code of either lower or */
     74 /*        upper case 'Z'. */
     75 
     76 	if (inta >= 97 && inta <= 122) {
     77 	    inta += -32;
     78 	}
     79 	if (intb >= 97 && intb <= 122) {
     80 	    intb += -32;
     81 	}
     82 
     83     } else if (zcode == 233 || zcode == 169) {
     84 
     85 /*        EBCDIC is assumed - ZCODE is the EBCDIC code of either lower or */
     86 /*        upper case 'Z'. */
     87 
     88 	if ((inta >= 129 && inta <= 137) || (inta >= 145 && inta <= 153) ||
     89             (inta >= 162 && inta <= 169)) {
     90 	    inta += 64;
     91 	}
     92 	if ((intb >= 129 && intb <= 137) || (intb >= 145 && intb <= 153) ||
     93             (intb >= 162 && intb <= 169)) {
     94 	    intb += 64;
     95 	}
     96 
     97     } else if (zcode == 218 || zcode == 250) {
     98 
     99 /*        ASCII is assumed, on Prime machines - ZCODE is the ASCII code */
    100 /*        plus 128 of either lower or upper case 'Z'. */
    101 
    102 	if (inta >= 225 && inta <= 250) {
    103 	    inta += -32;
    104 	}
    105 	if (intb >= 225 && intb <= 250) {
    106 	    intb += -32;
    107 	}
    108     }
    109     ret_val = inta == intb;
    110 
    111 /*     RETURN */
    112 
    113 /*     End of LSAME */
    114 
    115     return ret_val;
    116 } /* lsame_ */
    117 
    118