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authorMark Dickinson <dickinsm@gmail.com>2009-04-16 19:52:09 (GMT)
committerMark Dickinson <dickinsm@gmail.com>2009-04-16 19:52:09 (GMT)
commitb08a53a99def3fa949643974f713b5b189e21bc7 (patch)
tree6f7663d510099fd7acfa328ae5a5c88e3eddb1a7 /Include/dtoa.h
parent579b65c2d695eb468fb97568ff7d2ad9d261b2b3 (diff)
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Issue #1580: use short float repr where possible.
- incorporate and adapt David Gay's dtoa and strtod into the Python core - on platforms where we can use Gay's code (almost all!), repr(float) is based on the shortest sequence of decimal digits that rounds correctly. - add sys.float_repr_style attribute to indicate whether we're using Gay's code or not - add autoconf magic to detect and enable SSE2 instructions on x86/gcc - slight change to repr and str: repr switches to exponential notation at 1e16 instead of 1e17, str switches at 1e11 instead of 1e12
Diffstat (limited to 'Include/dtoa.h')
-rw-r--r--Include/dtoa.h15
1 files changed, 15 insertions, 0 deletions
diff --git a/Include/dtoa.h b/Include/dtoa.h
new file mode 100644
index 0000000..9b434b7
--- /dev/null
+++ b/Include/dtoa.h
@@ -0,0 +1,15 @@
+#ifndef PY_NO_SHORT_FLOAT_REPR
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+PyAPI_FUNC(double) _Py_dg_strtod(const char *str, char **ptr);
+PyAPI_FUNC(char *) _Py_dg_dtoa(double d, int mode, int ndigits,
+ int *decpt, int *sign, char **rve);
+PyAPI_FUNC(void) _Py_dg_freedtoa(char *s);
+
+
+#ifdef __cplusplus
+}
+#endif
+#endif