C:\test\C>cl /W3 bitsearch-oiskuu.c
Microsoft (R) C/C++ Optimizing Compiler Version 15.00.21022.08 for x64
Copyright (C) Microsoft Corporation.  All rights reserved.

bitsearch-oiskuu.c
bitsearch-oiskuu.c(49) : warning C4267: '=' : conversion from 'size_t' to 'U16', possible loss of data
bitsearch-oiskuu.c(78) : warning C4267: '=' : conversion from 'size_t' to 'char', possible loss of data
bitsearch-oiskuu.c(80) : warning C4267: '+=' : conversion from 'size_t' to 'char', possible loss of data
Microsoft (R) Incremental Linker Version 9.00.21022.08
Copyright (C) Microsoft Corporation.  All rights reserved.

/out:bitsearch-oiskuu.exe
bitsearch-oiskuu.obj

C:\test\C>bitsearch-oiskuu
Result           -1     Took 1.837746e-004 secs