How to find the source code of C_pSmirnov2x (used by R function ks.test)

General
1

I want to view the source code of C_pSmirnov2x

I search for C_pSmirnov2x and C_psmirnov2x, and stats.dll

I found the source code of ks.test at https://github.com/SurajGupta/r-source/blob/master/src/library/stats/R/ks.test.R

I found ks.C at zip file R-4.3.2\src\library\stats\src
But It contains only the pKolmogorov2x() function

2

I think its there on line 240 and calls a function up on line 90 in turn

3

line 90 is empty
line 240: if(test(q, 0., j / nd))
I didn't find pSmirnov2x in ks.C