tree 6616209c2e4b804169708185cd50428662db359c
parent ff3d00d703dd0273922fbae12d0ee50a14667657
author Dan Sinclair <dsinclair@chromium.org> 1526322280 +0000
committer Chromium commit bot <commit-bot@chromium.org> 1526322280 +0000

Use internal wcstof instead of system wcstod in formcalc lexer

This CL switches the usage of wcstod to use the FXSYS_wcstof to
determine if a given string is a valid floating point number.

Using the internal method makes linux slightly slower (10's of ms)
makes mac a lot faster 900ms to 60ms for the test case in the bug.

The FXSYS_wcstof method has been extended to handle the parsing of
float exponents. Unittests were added for FXSYS_wcstof.

Bug: chromium:813646
Change-Id: Ie68287a336e3b95a0c0b845d5bf39db6fc82b39c
Reviewed-on: https://pdfium-review.googlesource.com/32510
Reviewed-by: Ryan Harrison <rharrison@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>