This CL adds `utils::StringStream`. This is a wrapper over
std::stringstream which forces the locale to always be `classic`. The
logic to format floats and doubles as expected is moved from
`float_to_string` and handled in the StreamStream. This will make all of
our float emission the same.
Bug: tint:1686
Change-Id: If51868f577580d3ea6ab94d3910393e239fd55e4
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/121800
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
When converting floats to string, we now enforce the "C" locale, so
decimal points will be written as "." rather than the "," separator
used natively in some European locales.
Also, we now use operator>> to read back the number instead of
std::stof. std::stof works in the system locale, and will fail to
read back floats with the wrong decimal separator. (Also, std::stof
will throw if the number is out of range and can't fit in the
destination, which implies that the `if` check was probably never
failing.)
Skia encountered similar issues: see http://review.skia.org/587536
for the Skia implementation.
Change-Id: I5aded6acc7cfcf2ad4d5b974bc30c3b645eaec51
Bug: dawn:1686
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104680
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: John Stiles <johnstiles@google.com>
This reverts commit 5f9996dc9c4c057a6d54d4332d4e4baf2ea904a1.
Reason for revert: Issues around locale, will be revisited in a different fashion.
Original change's description:
> Replace std::stof with std::strtof.
>
> std::stof can throw std::out_of_range if the input is not actually
> representable. We had similar code in Skia which was using stof to
> test that a stringized float would round-trip successfully, and it
> would throw an exception on some older versions of libc++ for edge-
> case inputs like FLT_MIN.
>
> std::stof is documented as using strtof to do its conversion, so this
> shouldn't change your results in practice; it just removes the part
> where it could potentially throw for some inputs.
>
> Tangentially, have you ever seen a case where the scientific-notation
> path gets used? According to brucedawson@, nine digits should always
> safely round-trip (in 2013, testing gcc and MSVC). See
> https://randomascii.wordpress.com/2013/02/07/float-precision-revisited-nine-digit-float-portability/
>
> Change-Id: Ie215fb8502dd8c554020c6f73432f91e3d756563
> Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104500
> Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
> Auto-Submit: John Stiles <johnstiles@google.com>
> Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
> Commit-Queue: John Stiles <johnstiles@google.com>
TBR=dsinclair@chromium.org,johnstiles@google.com,noreply+kokoro@google.com,dawn-scoped@luci-project-accounts.iam.gserviceaccount.com,dsinclair@google.com
Change-Id: I825f5677f98dea1a13b6423ec18ae3a1e750ce09
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104502
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: John Stiles <johnstiles@google.com>
std::stof can throw std::out_of_range if the input is not actually
representable. We had similar code in Skia which was using stof to
test that a stringized float would round-trip successfully, and it
would throw an exception on some older versions of libc++ for edge-
case inputs like FLT_MIN.
std::stof is documented as using strtof to do its conversion, so this
shouldn't change your results in practice; it just removes the part
where it could potentially throw for some inputs.
Tangentially, have you ever seen a case where the scientific-notation
path gets used? According to brucedawson@, nine digits should always
safely round-trip (in 2013, testing gcc and MSVC). See
https://randomascii.wordpress.com/2013/02/07/float-precision-revisited-nine-digit-float-portability/
Change-Id: Ie215fb8502dd8c554020c6f73432f91e3d756563
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/104500
Reviewed-by: Dan Sinclair <dsinclair@chromium.org>
Auto-Submit: John Stiles <johnstiles@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Commit-Queue: John Stiles <johnstiles@google.com>
This CL updates the clang format files to have a single shared format
between Dawn and Tint. The major changes are tabs are 4 spaces, lines
are 100 columns and namespaces are not indented.
Bug: dawn:1339
Change-Id: I4208742c95643998d9fd14e77a9cc558071ded39
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87603
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Corentin Wallez <cwallez@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This PR condenses the namespaces in the tint/writer folder.
Change-Id: I66b28d6e70b99834dc6a25fee4c71e3036e0864a
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/86026
Auto-Submit: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
