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https://issues.apache.org/jira/browse/THRIFT-2026?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15931502#comment-15931502
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ASF GitHub Bot commented on THRIFT-2026:
----------------------------------------
Github user jbapple-cloudera commented on a diff in the pull request:
https://github.com/apache/thrift/pull/1214#discussion_r106794729
--- Diff: lib/c_glib/src/thrift/c_glib/protocol/thrift_compact_protocol.c
---
@@ -120,7 +120,11 @@ thrift_bitwise_cast_gdouble (const guint64 v)
static guint64
i64_to_zigzag (const gint64 l)
{
- return (l << 1) ^ (l >> 63);
--- End diff --
Negative input is expected:
https://github.com/apache/thrift/blob/796667b29f91682871cec310571e66b1259fffb0/lib/cpp/src/thrift/protocol/TCompactProtocol.tcc#L385
Also, changing the input to unsigned would actually break this, because the
right shift depends on being an arithmetic shift, not a logical one.
> Fix TCompactProtocol 64 bit builds
> ----------------------------------
>
> Key: THRIFT-2026
> URL: https://issues.apache.org/jira/browse/THRIFT-2026
> Project: Thrift
> Issue Type: Bug
> Components: C++ - Library
> Affects Versions: 0.9
> Environment: Mac 64, Win 64, Linux 64
> Reporter: Ben Craig
> Assignee: Ben Craig
> Fix For: 0.9.2
>
> Attachments: compact_int_stuff.patch
>
>
> TCompactProtocol has several places where it truncates a size_t to a 32-bit
> value.
> TCompactProtocol also does bitwise operations on signed values, which has
> undefined behavior.
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