ruby_scan_hex      55 include/ruby/util.h #define scan_hex(s,l,e) ((int)ruby_scan_hex((s),(l),(e)))
ruby_scan_hex      56 include/ruby/util.h unsigned long ruby_scan_hex(const char *, size_t, size_t *);
ruby_scan_hex    2410 re.c                   code = ruby_scan_hex(p, end-p, &len);
ruby_scan_hex    2447 re.c               code = ruby_scan_hex(p, 4, &len);