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Diffstat (limited to 'libX11/src/xcms/cmsMath.c')
-rw-r--r--libX11/src/xcms/cmsMath.c272
1 files changed, 136 insertions, 136 deletions
diff --git a/libX11/src/xcms/cmsMath.c b/libX11/src/xcms/cmsMath.c
index 70b067587..009a623b4 100644
--- a/libX11/src/xcms/cmsMath.c
+++ b/libX11/src/xcms/cmsMath.c
@@ -1,136 +1,136 @@
-
-/*
-
-Copyright 1990, 1998 The Open Group
-
-Permission to use, copy, modify, distribute, and sell this software and its
-documentation for any purpose is hereby granted without fee, provided that
-the above copyright notice appear in all copies and that both that
-copyright notice and this permission notice appear in supporting
-documentation.
-
-The above copyright notice and this permission notice shall be included in
-all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-Except as contained in this notice, the name of The Open Group shall not be
-used in advertising or otherwise to promote the sale, use or other dealings
-in this Software without prior written authorization from The Open Group.
-
-*/
-
-/*
- * Stephen Gildea, MIT X Consortium, January 1991
- */
-
-#ifdef HAVE_CONFIG_H
-#include <config.h>
-#endif
-#include "Xlibint.h"
-#include "Xcmsint.h"
-
-#include <float.h>
-#ifndef DBL_EPSILON
-#define DBL_EPSILON 1e-6
-#endif
-
-#ifdef _X_ROOT_STATS
-int cbrt_loopcount;
-int sqrt_loopcount;
-#endif
-
-/* Newton's Method: x_n+1 = x_n - ( f(x_n) / f'(x_n) ) */
-
-
-/* for cube roots, x^3 - a = 0, x_new = x - 1/3 (x - a/x^2) */
-
-double
-_XcmsCubeRoot(double a)
-{
- register double abs_a, cur_guess, delta;
-
-#ifdef DEBUG
- printf("_XcmsCubeRoot passed in %g\n", a);
-#endif
-#ifdef _X_ROOT_STATS
- cbrt_loopcount = 0;
-#endif
- if (a == 0.)
- return 0.;
-
- abs_a = a<0. ? -a : a; /* convert to positive to speed loop tests */
-
- /* arbitrary first guess */
- if (abs_a > 1.)
- cur_guess = abs_a/8.;
- else
- cur_guess = abs_a*8.;
-
- do {
-#ifdef _X_ROOT_STATS
- cbrt_loopcount++;
-#endif
- delta = (cur_guess - abs_a/(cur_guess*cur_guess))/3.;
- cur_guess -= delta;
- if (delta < 0.) delta = -delta;
- } while (delta >= cur_guess*DBL_EPSILON);
-
- if (a < 0.)
- cur_guess = -cur_guess;
-
-#ifdef DEBUG
- printf("_XcmsCubeRoot returning %g\n", cur_guess);
-#endif
- return cur_guess;
-}
-
-
-
-/* for square roots, x^2 - a = 0, x_new = x - 1/2 (x - a/x) */
-
-double
-_XcmsSquareRoot(double a)
-{
- register double cur_guess, delta;
-
-#ifdef DEBUG
- printf("_XcmsSquareRoot passed in %g\n", a);
-#endif
-#ifdef _X_ROOT_STATS
- sqrt_loopcount = 0;
-#endif
- if (a == 0.)
- return 0.;
-
- if (a < 0.) {
- /* errno = EDOM; */
- return 0.;
- }
-
- /* arbitrary first guess */
- if (a > 1.)
- cur_guess = a/4.;
- else
- cur_guess = a*4.;
-
- do {
-#ifdef _X_ROOT_STATS
- sqrt_loopcount++;
-#endif
- delta = (cur_guess - a/cur_guess)/2.;
- cur_guess -= delta;
- if (delta < 0.) delta = -delta;
- } while (delta >= cur_guess*DBL_EPSILON);
-
-#ifdef DEBUG
- printf("_XcmsSquareRoot returning %g\n", cur_guess);
-#endif
- return cur_guess;
-}
-
+
+/*
+
+Copyright 1990, 1998 The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+*/
+
+/*
+ * Stephen Gildea, MIT X Consortium, January 1991
+ */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "Xlibint.h"
+#include "Xcmsint.h"
+
+#include <float.h>
+#ifndef DBL_EPSILON
+#define DBL_EPSILON 1e-6
+#endif
+
+#ifdef _X_ROOT_STATS
+int cbrt_loopcount;
+int sqrt_loopcount;
+#endif
+
+/* Newton's Method: x_n+1 = x_n - ( f(x_n) / f'(x_n) ) */
+
+
+/* for cube roots, x^3 - a = 0, x_new = x - 1/3 (x - a/x^2) */
+
+double
+_XcmsCubeRoot(double a)
+{
+ register double abs_a, cur_guess, delta;
+
+#ifdef DEBUG
+ printf("_XcmsCubeRoot passed in %g\n", a);
+#endif
+#ifdef _X_ROOT_STATS
+ cbrt_loopcount = 0;
+#endif
+ if (a == 0.)
+ return 0.;
+
+ abs_a = a<0. ? -a : a; /* convert to positive to speed loop tests */
+
+ /* arbitrary first guess */
+ if (abs_a > 1.)
+ cur_guess = abs_a/8.;
+ else
+ cur_guess = abs_a*8.;
+
+ do {
+#ifdef _X_ROOT_STATS
+ cbrt_loopcount++;
+#endif
+ delta = (cur_guess - abs_a/(cur_guess*cur_guess))/3.;
+ cur_guess -= delta;
+ if (delta < 0.) delta = -delta;
+ } while (delta >= cur_guess*DBL_EPSILON);
+
+ if (a < 0.)
+ cur_guess = -cur_guess;
+
+#ifdef DEBUG
+ printf("_XcmsCubeRoot returning %g\n", cur_guess);
+#endif
+ return cur_guess;
+}
+
+
+
+/* for square roots, x^2 - a = 0, x_new = x - 1/2 (x - a/x) */
+
+double
+_XcmsSquareRoot(double a)
+{
+ register double cur_guess, delta;
+
+#ifdef DEBUG
+ printf("_XcmsSquareRoot passed in %g\n", a);
+#endif
+#ifdef _X_ROOT_STATS
+ sqrt_loopcount = 0;
+#endif
+ if (a == 0.)
+ return 0.;
+
+ if (a < 0.) {
+ /* errno = EDOM; */
+ return 0.;
+ }
+
+ /* arbitrary first guess */
+ if (a > 1.)
+ cur_guess = a/4.;
+ else
+ cur_guess = a*4.;
+
+ do {
+#ifdef _X_ROOT_STATS
+ sqrt_loopcount++;
+#endif
+ delta = (cur_guess - a/cur_guess)/2.;
+ cur_guess -= delta;
+ if (delta < 0.) delta = -delta;
+ } while (delta >= cur_guess*DBL_EPSILON);
+
+#ifdef DEBUG
+ printf("_XcmsSquareRoot returning %g\n", cur_guess);
+#endif
+ return cur_guess;
+}
+
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