"atomic bomb" commit. Reorganized OpenCV directory structure

2010-05-11 17:44:00 +00:00
commit 127d6649a1
1761 changed files with 1766340 additions and 0 deletions
--- a/3rdparty/lapack/sgeqr2.c
+++ b/3rdparty/lapack/sgeqr2.c
@@ -0,0 +1,148 @@
+#include "clapack.h"
+
+/* Table of constant values */
+
+static integer c__1 = 1;
+
+/* Subroutine */ int sgeqr2_(integer *m, integer *n, real *a, integer *lda, 
+	real *tau, real *work, integer *info)
+{
+    /* System generated locals */
+    integer a_dim1, a_offset, i__1, i__2, i__3;
+
+    /* Local variables */
+    integer i__, k;
+    real aii;
+    extern /* Subroutine */ int slarf_(char *, integer *, integer *, real *, 
+	    integer *, real *, real *, integer *, real *), xerbla_(
+	    char *, integer *), slarfg_(integer *, real *, real *, 
+	    integer *, real *);
+
+
+/*  -- LAPACK routine (version 3.1) -- */
+/*     Univ. of Tennessee, Univ. of California Berkeley and NAG Ltd.. */
+/*     November 2006 */
+
+/*     .. Scalar Arguments .. */
+/*     .. */
+/*     .. Array Arguments .. */
+/*     .. */
+
+/*  Purpose */
+/*  ======= */
+
+/*  SGEQR2 computes a QR factorization of a real m by n matrix A: */
+/*  A = Q * R. */
+
+/*  Arguments */
+/*  ========= */
+
+/*  M       (input) INTEGER */
+/*          The number of rows of the matrix A.  M >= 0. */
+
+/*  N       (input) INTEGER */
+/*          The number of columns of the matrix A.  N >= 0. */
+
+/*  A       (input/output) REAL array, dimension (LDA,N) */
+/*          On entry, the m by n matrix A. */
+/*          On exit, the elements on and above the diagonal of the array */
+/*          contain the min(m,n) by n upper trapezoidal matrix R (R is */
+/*          upper triangular if m >= n); the elements below the diagonal, */
+/*          with the array TAU, represent the orthogonal matrix Q as a */
+/*          product of elementary reflectors (see Further Details). */
+
+/*  LDA     (input) INTEGER */
+/*          The leading dimension of the array A.  LDA >= max(1,M). */
+
+/*  TAU     (output) REAL array, dimension (min(M,N)) */
+/*          The scalar factors of the elementary reflectors (see Further */
+/*          Details). */
+
+/*  WORK    (workspace) REAL array, dimension (N) */
+
+/*  INFO    (output) INTEGER */
+/*          = 0: successful exit */
+/*          < 0: if INFO = -i, the i-th argument had an illegal value */
+
+/*  Further Details */
+/*  =============== */
+
+/*  The matrix Q is represented as a product of elementary reflectors */
+
+/*     Q = H(1) H(2) . . . H(k), where k = min(m,n). */
+
+/*  Each H(i) has the form */
+
+/*     H(i) = I - tau * v * v' */
+
+/*  where tau is a real scalar, and v is a real vector with */
+/*  v(1:i-1) = 0 and v(i) = 1; v(i+1:m) is stored on exit in A(i+1:m,i), */
+/*  and tau in TAU(i). */
+
+/*  ===================================================================== */
+
+/*     .. Parameters .. */
+/*     .. */
+/*     .. Local Scalars .. */
+/*     .. */
+/*     .. External Subroutines .. */
+/*     .. */
+/*     .. Intrinsic Functions .. */
+/*     .. */
+/*     .. Executable Statements .. */
+
+/*     Test the input arguments */
+
+    /* Parameter adjustments */
+    a_dim1 = *lda;
+    a_offset = 1 + a_dim1;
+    a -= a_offset;
+    --tau;
+    --work;
+
+    /* Function Body */
+    *info = 0;
+    if (*m < 0) {
+	*info = -1;
+    } else if (*n < 0) {
+	*info = -2;
+    } else if (*lda < max(1,*m)) {
+	*info = -4;
+    }
+    if (*info != 0) {
+	i__1 = -(*info);
+	xerbla_("SGEQR2", &i__1);
+	return 0;
+    }
+
+    k = min(*m,*n);
+
+    i__1 = k;
+    for (i__ = 1; i__ <= i__1; ++i__) {
+
+/*        Generate elementary reflector H(i) to annihilate A(i+1:m,i) */
+
+	i__2 = *m - i__ + 1;
+/* Computing MIN */
+	i__3 = i__ + 1;
+	slarfg_(&i__2, &a[i__ + i__ * a_dim1], &a[min(i__3, *m)+ i__ * a_dim1]
+, &c__1, &tau[i__]);
+	if (i__ < *n) {
+
+/*           Apply H(i) to A(i:m,i+1:n) from the left */
+
+	    aii = a[i__ + i__ * a_dim1];
+	    a[i__ + i__ * a_dim1] = 1.f;
+	    i__2 = *m - i__ + 1;
+	    i__3 = *n - i__;
+	    slarf_("Left", &i__2, &i__3, &a[i__ + i__ * a_dim1], &c__1, &tau[
+		    i__], &a[i__ + (i__ + 1) * a_dim1], lda, &work[1]);
+	    a[i__ + i__ * a_dim1] = aii;
+	}
+/* L10: */
+    }
+    return 0;
+
+/*     End of SGEQR2 */
+
+} /* sgeqr2_ */