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diff Objects/floatobject.c @ 44086:110ff614ec28

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Merged revisions 59245-59254 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r59245 | georg.brandl | 2007-11-30 23:04:45 +0100 (Fri, 30 Nov 2007) | 2 lines Move lchmod() docs to correct place, and add versionadded tags. ........ r59249 | christian.heimes | 2007-11-30 23:36:10 +0100 (Fri, 30 Nov 2007) | 2 lines Backport of -r59242:59246 from py3k Fixed problem with regrtest caused by the additional of objects to _abcoll. ........ r59253 | christian.heimes | 2007-12-01 02:03:20 +0100 (Sat, 01 Dec 2007) | 1 line Although pyconfig.h claims that WIN32 is obsolete it is still required for the locale module. locale.getdefaultlocale() fails silently w/o the WIN32 macro. ........ r59254 | christian.heimes | 2007-12-01 12:20:10 +0100 (Sat, 01 Dec 2007) | 3 lines Feature #1534 Added PyFloat_GetMax(), PyFloat_GetMin() and PyFloat_GetInfo() to the float API. Added a dictionary sys.float_info with information about the internal floating point type to the sys module. ........
author Christian Heimes <christian@cheimes.de>
date Sat, 01 Dec 2007 12:22:32 +0000
parents 0ff41b163f5b
children f324631462a2
line wrap: on
line diff
--- a/Objects/floatobject.c	Fri Nov 30 23:45:17 2007 +0000
+++ b/Objects/floatobject.c	Sat Dec 01 12:22:32 2007 +0000
@@ -9,6 +9,7 @@
 #include "formatter_unicode.h"
 
 #include <ctype.h>
+#include <float.h>
 
 #if !defined(__STDC__)
 extern double fmod(double, double);
@@ -48,6 +49,52 @@
 	return p + N_FLOATOBJECTS - 1;
 }
 
+double
+PyFloat_GetMax(void)
+{
+	return DBL_MAX;
+}
+
+double
+PyFloat_GetMin(void)
+{
+	return DBL_MIN;
+}
+
+PyObject *
+PyFloat_GetInfo(void)
+{
+	PyObject *d, *tmp;
+
+#define SET_FLOAT_CONST(d, key, const) \
+	tmp = PyFloat_FromDouble(const); \
+	if (tmp == NULL) return NULL; \
+	if (PyDict_SetItemString(d, key, tmp)) return NULL; \
+	Py_DECREF(tmp)
+#define SET_INT_CONST(d, key, const) \
+	tmp = PyInt_FromLong(const); \
+	if (tmp == NULL) return NULL; \
+	if (PyDict_SetItemString(d, key, tmp)) return NULL; \
+	Py_DECREF(tmp)
+
+	d = PyDict_New();
+
+	SET_FLOAT_CONST(d, "max", DBL_MAX);
+	SET_INT_CONST(d, "max_exp", DBL_MAX_EXP);
+	SET_INT_CONST(d, "max_10_exp", DBL_MAX_10_EXP);
+	SET_FLOAT_CONST(d, "min", DBL_MIN);
+	SET_INT_CONST(d, "min_exp", DBL_MIN_EXP);
+	SET_INT_CONST(d, "min_10_exp", DBL_MIN_10_EXP);
+	SET_INT_CONST(d, "dig", DBL_DIG);
+	SET_INT_CONST(d, "mant_dig", DBL_MANT_DIG);
+	SET_FLOAT_CONST(d, "epsilon", DBL_EPSILON);
+	SET_INT_CONST(d, "radix", FLT_RADIX);
+	SET_INT_CONST(d, "rounds", FLT_ROUNDS);
+
+	return d;
+}
+
+
 PyObject *
 PyFloat_FromDouble(double fval)
 {