Commit graph

3 commits

Author SHA1 Message Date
Mirko Bonadei
b721761a1a Reworking byte order utility functions for Windows platforms.
Functions htonll and ntohll are only available when
NTDDI_VERSION>=NTDDI_WIN8 or INCL_EXTRA_HTON_FUNCTIONS is defined,
instead of assuming this to be true, this CL replaces them with
_byteswap_uint64 [1].

On top of that, the following functions were assuming host to be
little endian on Windows and NaCl:
- htobe16(v)
- htobe32(v)
- be16toh(v)
- be32toh(v)
- htobe64(v)
- be64toh(v)

But it is the application's responsibility to check the host
endianness before calling ntohs, ntohl (and probably also htons and
htonl). See [2], especially: "The ntohs function returns the value
in host byte order. If the netshort parameter is already in host byte
order, then this function will reverse it. It is up to the application
to determine if the byte order must be reversed.".

After this CL, WebRTC should do the right thing based on the value
of WEBRTC_ARCH_{BIG,LITTLE}_ENDIAN.

[1] - https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/byteswap-uint64-byteswap-ulong-byteswap-ushort
[2] - https://docs.microsoft.com/en-us/windows/desktop/api/winsock/nf-winsock-ntohs

Bug: None
Change-Id: I61ca882ad81dd090fd164b0fdfeec64cd088a71d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/129901
Reviewed-by: Tommi <tommi@webrtc.org>
Reviewed-by: Noah Richards <noahric@chromium.org>
Reviewed-by: Yves Gerey <yvesg@google.com>
Reviewed-by: Yves Gerey <yvesg@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#27371}
2019-03-31 11:55:09 +00:00
Steve Anton
10542f21c8 (4) Rename files to snake_case: update BUILD.gn, include paths, header guards, and DEPS entries
Mechanically generated by running this command:

tools_webrtc/do-renames.sh update all-renames.txt && git cl format

Then manually updating:

tools_webrtc/sanitizers/tsan_suppressions_webrtc.cc

Bug: webrtc:10159
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I54824cd91dada8fc3ee3d098f971bc319d477833
Reviewed-on: https://webrtc-review.googlesource.com/c/115653
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26226}
2019-01-11 17:11:39 +00:00
Steve Anton
1c05765831 (3) Rename files to snake_case: move the files
Mechanically generated with this command:

tools_webrtc/do-rename.sh move all-renames.txt

Bug: webrtc:10159
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Change-Id: I8b05b6eab9b9d18b29c2199bbea239e9add1e690
Reviewed-on: https://webrtc-review.googlesource.com/c/115481
Reviewed-by: Karl Wiberg <kwiberg@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26225}
2019-01-11 17:05:20 +00:00
Renamed from rtc_base/byteorder.h (Browse further)