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-rw-r--r--gsl-1.9/ieee-utils/print.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/gsl-1.9/ieee-utils/print.c b/gsl-1.9/ieee-utils/print.c
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+++ b/gsl-1.9/ieee-utils/print.c
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+/* ieee-utils/print.c
+ *
+ * Copyright (C) 1996, 1997, 1998, 1999, 2000 Brian Gough
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#include <config.h>
+#include <stdio.h>
+#include <math.h>
+#include <gsl/gsl_ieee_utils.h>
+
+/* A table of sign characters, 0=positive, 1=negative. We print a space
+ instead of a unary + sign for compatibility with bc */
+
+static char signs[2]={' ','-'} ;
+
+void
+gsl_ieee_fprintf_float (FILE * stream, const float * x) {
+ gsl_ieee_float_rep r ;
+ gsl_ieee_float_to_rep(x, &r) ;
+
+ switch (r.type)
+ {
+ case GSL_IEEE_TYPE_NAN:
+ fprintf(stream, "NaN") ;
+ break ;
+ case GSL_IEEE_TYPE_INF:
+ fprintf(stream, "%cInf", signs[r.sign]) ;
+ break ;
+ case GSL_IEEE_TYPE_NORMAL:
+ fprintf(stream, "%c1.%s*2^%d", signs[r.sign], r.mantissa, r.exponent) ;
+ break ;
+ case GSL_IEEE_TYPE_DENORMAL:
+ fprintf(stream, "%c0.%s*2^%d", signs[r.sign], r.mantissa, r.exponent + 1) ;
+ break ;
+ case GSL_IEEE_TYPE_ZERO:
+ fprintf(stream, "%c0", signs[r.sign]) ;
+ break ;
+ default:
+ fprintf(stream, "[non-standard IEEE float]") ;
+ }
+}
+
+void
+gsl_ieee_printf_float (const float * x)
+{
+ gsl_ieee_fprintf_float (stdout,x);
+}
+
+void
+gsl_ieee_fprintf_double (FILE * stream, const double * x) {
+ gsl_ieee_double_rep r ;
+ gsl_ieee_double_to_rep (x, &r) ;
+
+ switch (r.type)
+ {
+ case GSL_IEEE_TYPE_NAN:
+ fprintf(stream, "NaN") ;
+ break ;
+ case GSL_IEEE_TYPE_INF:
+ fprintf(stream, "%cInf", signs[r.sign]) ;
+ break ;
+ case GSL_IEEE_TYPE_NORMAL:
+ fprintf(stream, "%c1.%s*2^%d", signs[r.sign], r.mantissa, r.exponent) ;
+ break ;
+ case GSL_IEEE_TYPE_DENORMAL:
+ fprintf(stream, "%c0.%s*2^%d", signs[r.sign], r.mantissa, r.exponent + 1) ;
+ break ;
+ case GSL_IEEE_TYPE_ZERO:
+ fprintf(stream, "%c0", signs[r.sign]) ;
+ break ;
+ default:
+ fprintf(stream, "[non-standard IEEE double]") ;
+ }
+}
+
+void
+gsl_ieee_printf_double (const double * x)
+{
+ gsl_ieee_fprintf_double (stdout,x);
+}
+
+
+
+
+