/* zswap.f -- translated by f2c (version 20061008). 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 "f2c.h" #include "blaswrap.h" /* Subroutine */ int zswap_(integer *n, doublecomplex *zx, integer *incx, doublecomplex *zy, integer *incy) { /* System generated locals */ integer i__1, i__2, i__3; /* Local variables */ integer i__, ix, iy; doublecomplex ztemp; /* .. Scalar Arguments .. */ /* .. */ /* .. Array Arguments .. */ /* .. */ /* Purpose */ /* ======= */ /* interchanges two vectors. */ /* jack dongarra, 3/11/78. */ /* modified 12/3/93, array(1) declarations changed to array(*) */ /* .. Local Scalars .. */ /* .. */ /* Parameter adjustments */ --zy; --zx; /* Function Body */ if (*n <= 0) { return 0; } if (*incx == 1 && *incy == 1) { goto L20; } /* code for unequal increments or equal increments not equal */ /* to 1 */ ix = 1; iy = 1; if (*incx < 0) { ix = (-(*n) + 1) * *incx + 1; } if (*incy < 0) { iy = (-(*n) + 1) * *incy + 1; } i__1 = *n; for (i__ = 1; i__ <= i__1; ++i__) { i__2 = ix; ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i; i__2 = ix; i__3 = iy; zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i; i__2 = iy; zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i; ix += *incx; iy += *incy; /* L10: */ } return 0; /* code for both increments equal to 1 */ L20: i__1 = *n; for (i__ = 1; i__ <= i__1; ++i__) { i__2 = i__; ztemp.r = zx[i__2].r, ztemp.i = zx[i__2].i; i__2 = i__; i__3 = i__; zx[i__2].r = zy[i__3].r, zx[i__2].i = zy[i__3].i; i__2 = i__; zy[i__2].r = ztemp.r, zy[i__2].i = ztemp.i; /* L30: */ } return 0; } /* zswap_ */