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https://issues.apache.org/jira/browse/ARROW-1623?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16345747#comment-16345747
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ASF GitHub Bot commented on ARROW-1623:
---------------------------------------
cpcloud commented on a change in pull request #1518: ARROW-1623: [C++] Add
convenience method to construct Buffer from a string that owns its memory
URL: https://github.com/apache/arrow/pull/1518#discussion_r164868200
##########
File path: cpp/src/arrow/buffer.cc
##########
@@ -58,6 +58,17 @@ bool Buffer::Equals(const Buffer& other) const {
!memcmp(data_, other.data_,
static_cast<size_t>(size_))));
}
+Status Buffer::FromString(const std::string& data, MemoryPool* pool,
+ std::shared_ptr<Buffer>* out) {
+ auto str = reinterpret_cast<const uint8_t*>(data.c_str());
+ auto size = static_cast<int64_t>(data.size());
+
+ RETURN_NOT_OK(AllocateBuffer(pool, size, out));
+ std::memcpy((*out)->mutable_data(), str, size);
Review comment:
Should use `std::copy` here. This will lower to `memcpy` if possible on both
gcc and clang.
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> [C++] Add convenience method to construct Buffer from a string that owns its
> memory
> -----------------------------------------------------------------------------------
>
> Key: ARROW-1623
> URL: https://issues.apache.org/jira/browse/ARROW-1623
> Project: Apache Arrow
> Issue Type: Improvement
> Components: C++
> Reporter: Wes McKinney
> Assignee: Panchen Xue
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.9.0
>
>
> The memory would need to be allocated from a memory pool / buffer allocator
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