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[0.4.9][JSCRIPT] Fix regression CORE-13810 "Vypress Chat 2.1.9 MSI setup fatal error"

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The regression was unhidden by MSI-winesync 1.5.10 almost 7years ago:
8939969e21 == SVN r57070

Finally we can fix it by adding MS enumerator extension to Jscript.
Many thanks to the patches author
Andreas Maier <staubim@quantentunnel.de>
JIRA-nick: andy-123

fix picked from commit 0.4.12-RC-18-g 9ebb42a4c0

It went afterwards into master in slightly modified form as 0.4.13-dev-890-g 83dcae1
But I decided to take the older state from 0.4.12RC, so that I do not have to risk
touching releases/0.4.12 again to sync to "latest&greatest".

Due to the changed PROPF_* defines in jscript.h, I felt most safe by porting back also:
0.4.10-dev-188-g c6f49f5
0.4.10-dev-152-g 3f071cc
This commit is contained in:
Joachim Henze 2019-05-17 00:47:16 +02:00
parent ead395d3ae
commit a15d6418cf
20 changed files with 2307 additions and 1066 deletions
Download patch file Download diff file Expand all files Collapse all files

9
dll/win32/jscript/jsutils.c
View file

@ -659,11 +659,18 @@ HRESULT to_int32(script_ctx_t *ctx, jsval_t v, INT *ret)
double n;
HRESULT hres;
const double p32 = (double)0xffffffff + 1;
hres = to_number(ctx, v, &n);
if(FAILED(hres))
return hres;
*ret = is_finite(n) ? n : 0;
if(is_finite(n))
n = n > 0 ? fmod(n, p32) : -fmod(-n, p32);
else
n = 0;
*ret = (UINT32)n;
return S_OK;
}