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src: prefer data accessor of string and vector #47750

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merged 1 commit into from
May 3, 2023

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@VoltrexKeyva VoltrexKeyva commented Apr 27, 2023

The pattern of getting the address of the element at index 0 of a container is generally used to materialize a pointer to the backing data of a container, however std::string and std::vector provide a data() accessor to retrieve the data pointer which should be preferred.

This also ensures that in the case that the container is empty, the data pointer access does not perform an errant memory access.

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Review requested:

  • @nodejs/net
  • @nodejs/startup

@nodejs-github-bot nodejs-github-bot added c++ Issues and PRs that require attention from people who are familiar with C++. lib / src Issues and PRs related to general changes in the lib or src directory. needs-ci PRs that need a full CI run. labels Apr 27, 2023
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Seems like a recent change unsatisfied the JavaScript coverage threshold.

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The pattern of getting the address of the element at index 0 of a
container is generally used to materialize a pointer to the backing
data of a container, however `std::string` and `std::vector`
provide a `data()` accessor to retrieve the data pointer which
should be preferred.

This also ensures that in the case that the container is empty, the
data pointer access does not perform an errant memory access.
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lgtm

@VoltrexKeyva VoltrexKeyva added the request-ci Add this label to start a Jenkins CI on a PR. label May 3, 2023
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@VoltrexKeyva VoltrexKeyva added the commit-queue Add this label to land a pull request using GitHub Actions. label May 3, 2023
@nodejs-github-bot nodejs-github-bot removed the commit-queue Add this label to land a pull request using GitHub Actions. label May 3, 2023
@nodejs-github-bot nodejs-github-bot merged commit dd6eb67 into nodejs:main May 3, 2023
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Landed in dd6eb67

@VoltrexKeyva VoltrexKeyva deleted the prefer-data-acc branch May 3, 2023 14:21
targos pushed a commit that referenced this pull request May 12, 2023
The pattern of getting the address of the element at index 0 of a
container is generally used to materialize a pointer to the backing
data of a container, however `std::string` and `std::vector`
provide a `data()` accessor to retrieve the data pointer which
should be preferred.

This also ensures that in the case that the container is empty, the
data pointer access does not perform an errant memory access.

PR-URL: #47750
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
danielleadams pushed a commit that referenced this pull request Jul 6, 2023
The pattern of getting the address of the element at index 0 of a
container is generally used to materialize a pointer to the backing
data of a container, however `std::string` and `std::vector`
provide a `data()` accessor to retrieve the data pointer which
should be preferred.

This also ensures that in the case that the container is empty, the
data pointer access does not perform an errant memory access.

PR-URL: #47750
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
MoLow pushed a commit to MoLow/node that referenced this pull request Jul 6, 2023
The pattern of getting the address of the element at index 0 of a
container is generally used to materialize a pointer to the backing
data of a container, however `std::string` and `std::vector`
provide a `data()` accessor to retrieve the data pointer which
should be preferred.

This also ensures that in the case that the container is empty, the
data pointer access does not perform an errant memory access.

PR-URL: nodejs#47750
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Daeyeon Jeong <daeyeon.dev@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Matteo Collina <matteo.collina@gmail.com>
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7 participants