utilities: Implemented an ostream that writes to a user provided buffer #13797

Merged

mattklein123 merged 7 commits intoenvoyproxy:masterfrom

KBaichoo:ostream-memory-buff

Nov 23, 2020

Commits on Oct 28, 2020

Implemented an ostream that writes to a user provided buffer and truncates if we surpass the buffer size.
KBaichoo
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Minor changes to tests mostly.
KBaichoo
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Marked numValidBytesWrittenToBuffer const. Used std::array for test.
KBaichoo
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Commits on Nov 19, 2020

Commits on Nov 20, 2020

Minor tweaks.
KBaichoo
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Commits on Nov 23, 2020

Merge remote-tracking branch 'upstream/master' into ostream-memory-buff
KBaichoo
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