ruby_scan_hex      45 include/ruby/util.h #define scan_hex ruby_scan_hex
ruby_scan_hex      46 include/ruby/util.h unsigned long ruby_scan_hex(const char *, int, int *);
ruby_scan_hex    1872 re.c                   code = ruby_scan_hex(p, end < p+2 ? end-p : 2, &len);
ruby_scan_hex    2043 re.c                   code = ruby_scan_hex(p, end-p, &len);
ruby_scan_hex    2080 re.c               code = ruby_scan_hex(p, 4, &len);