cosmopolitan/third_party/blas/lsame.c

156 lines
3.9 KiB
C

/* lsame.f -- translated by f2c (version 20191129).
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
*/
#include "third_party/f2c/f2c.h"
/* > \brief \b LSAME */
/* =========== DOCUMENTATION =========== */
/* Online html documentation available at */
/* http://www.netlib.org/lapack/explore-html/ */
/* Definition: */
/* =========== */
/* LOGICAL FUNCTION LSAME(CA,CB) */
/* .. Scalar Arguments .. */
/* CHARACTER CA,CB */
/* .. */
/* > \par Purpose: */
/* ============= */
/* > */
/* > \verbatim */
/* > */
/* > LSAME returns .TRUE. if CA is the same letter as CB regardless of */
/* > case. */
/* > \endverbatim */
/* Arguments: */
/* ========== */
/* > \param[in] CA */
/* > \verbatim */
/* > CA is CHARACTER*1 */
/* > \endverbatim */
/* > */
/* > \param[in] CB */
/* > \verbatim */
/* > CB is CHARACTER*1 */
/* > CA and CB specify the single characters to be compared. */
/* > \endverbatim */
/* Authors: */
/* ======== */
/* > \author Univ. of Tennessee */
/* > \author Univ. of California Berkeley */
/* > \author Univ. of Colorado Denver */
/* > \author NAG Ltd. */
/* > \date December 2016 */
/* > \ingroup aux_blas */
/* ===================================================================== */
logical lsame_(char *ca, char *cb) {
/* System generated locals */
logical ret_val;
/* Local variables */
static integer inta, intb, zcode;
/* -- Reference BLAS level1 routine (version 3.1) -- */
/* -- Reference BLAS is a software package provided by Univ. of Tennessee,
* -- */
/* -- Univ. of California Berkeley, Univ. of Colorado Denver and NAG Ltd..--
*/
/* December 2016 */
/* .. Scalar Arguments .. */
/* .. */
/* ===================================================================== */
/* .. Intrinsic Functions .. */
/* .. */
/* .. Local Scalars .. */
/* .. */
/* Test if the characters are equal */
ret_val = *(unsigned char *)ca == *(unsigned char *)cb;
if (ret_val) {
return ret_val;
}
/* Now test for equivalence if both characters are alphabetic. */
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 = *(unsigned char *)ca;
intb = *(unsigned char *)cb;
if (zcode == 90 || zcode == 122) {
/* ASCII is assumed - ZCODE is the ASCII code of either lower or */
/* upper case 'Z'. */
if (inta >= 97 && inta <= 122) {
inta += -32;
}
if (intb >= 97 && intb <= 122) {
intb += -32;
}
} 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 == 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 >= 225 && inta <= 250) {
inta += -32;
}
if (intb >= 225 && intb <= 250) {
intb += -32;
}
}
ret_val = inta == intb;
/* RETURN */
/* End of LSAME */
return ret_val;
} /* lsame_ */