Function strchrnul

base/string/format/vprint.cpp:21–28

#ifndef _GNU_SOURCE
static const char* strchrnul(const char* s, int ch)
{
    const char* p = s;
    while (*p && *p != ch) {
        ++p;
    }
    return p;
}
#endif

static int DoFillSpeciationFromArg(int* value,