79 lines
2.2 KiB
Diff
79 lines
2.2 KiB
Diff
From eee0beef88d135640871050b40844272a3aee790 Mon Sep 17 00:00:00 2001
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From: Tres Seaver <tseaver@palladion.com>
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Date: Tue, 15 Sep 2015 17:20:18 -0400
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Subject: [PATCH 1/2] Ensure that we don't overlook errors in first
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PyObject_RichCompareBool call.
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Python 3.5 turns such cases into SystemErrors.
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See: https://bugs.python.org/issue23571
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Fixes #15.
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---
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BTrees/_compat.h | 22 +++++++++++++++++++---
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1 file changed, 19 insertions(+), 3 deletions(-)
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diff --git a/BTrees/_compat.h b/BTrees/_compat.h
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index e004d54..19dd377 100644
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--- a/BTrees/_compat.h
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+++ b/BTrees/_compat.h
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@@ -27,9 +27,25 @@
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#define TEXT_FROM_STRING PyUnicode_FromString
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#define TEXT_FORMAT PyUnicode_Format
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-#define COMPARE(lhs, rhs) \
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- PyObject_RichCompareBool((lhs), (rhs), Py_LT) > 0 ? -1 : \
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- (PyObject_RichCompareBool((lhs), (rhs), Py_EQ) > 0 ? 0 : 1)
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+/* Emulate Python2's __cmp__, wrapping PyObject_RichCompareBool(),
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+ * Return -2/-3 for errors, -1 for lhs<rhs, 0 for lhs==rhs, 1 for lhs>rhs.
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+ */
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+static inline
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+int __compare(PyObject *lhs, PyObject *rhs) {
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+ int less, equal;
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+
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+ less = PyObject_RichCompareBool(lhs, rhs, Py_LT);
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+ if ( less == -1 ) {
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+ return -2;
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+ }
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+ equal = PyObject_RichCompareBool(lhs, rhs, Py_EQ);
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+ if ( equal == -1 ) {
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+ return -3;
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+ }
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+ return less ? -1 : (equal ? 0 : 1);
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+}
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+
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+#define COMPARE(lhs, rhs) __compare((lhs), (rhs))
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#else
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From ff4c3309fe471f2b9bdd642b8f7d1c2fe0f5e458 Mon Sep 17 00:00:00 2001
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From: Tres Seaver <tseaver@palladion.com>
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Date: Sun, 20 Sep 2015 11:07:10 -0400
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Subject: [PATCH 2/2] Avoid unnecessary comparison for 'Py_EQ' if 'Py_LT'
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returned True.
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---
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BTrees/_compat.h | 5 ++++-
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1 file changed, 4 insertions(+), 1 deletion(-)
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diff --git a/BTrees/_compat.h b/BTrees/_compat.h
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index 19dd377..ece2bf9 100644
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--- a/BTrees/_compat.h
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+++ b/BTrees/_compat.h
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@@ -38,11 +38,14 @@ int __compare(PyObject *lhs, PyObject *rhs) {
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if ( less == -1 ) {
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return -2;
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}
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+ if (less) {
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+ return -1;
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+ }
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equal = PyObject_RichCompareBool(lhs, rhs, Py_EQ);
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if ( equal == -1 ) {
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return -3;
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}
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- return less ? -1 : (equal ? 0 : 1);
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+ return equal ? 0 : 1;
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}
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#define COMPARE(lhs, rhs) __compare((lhs), (rhs))
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