text: #ifndef PYCTYPE_H
  #define PYCTYPE_H
  
  #define PY_CTF_LOWER  0x01
  #define PY_CTF_UPPER  0x02
  #define PY_CTF_ALPHA  (PY_CTF_LOWER|PY_CTF_UPPER)
  #define PY_CTF_DIGIT  0x04
  #define PY_CTF_ALNUM  (PY_CTF_ALPHA|PY_CTF_DIGIT)
  #define PY_CTF_SPACE  0x08
  #define PY_CTF_XDIGIT 0x10
  
  PyAPI_DATA(const unsigned int) _Py_ctype_table[256];
  
  /* Unlike their C counterparts, the following macros are not meant to
   * handle an int with any of the values [EOF, 0-UCHAR_MAX]. The argument
   * must be a signed/unsigned char. */
  #define Py_ISLOWER(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_LOWER)
  #define Py_ISUPPER(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_UPPER)
  #define Py_ISALPHA(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_ALPHA)
  #define Py_ISDIGIT(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_DIGIT)
  #define Py_ISXDIGIT(c) (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_XDIGIT)
  #define Py_ISALNUM(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_ALNUM)
  #define Py_ISSPACE(c)  (_Py_ctype_table[Py_CHARMASK(c)] & PY_CTF_SPACE)
  
  PyAPI_DATA(const unsigned char) _Py_ctype_tolower[256];
  PyAPI_DATA(const unsigned char) _Py_ctype_toupper[256];
  
  #define Py_TOLOWER(c) (_Py_ctype_tolower[Py_CHARMASK(c)])
  #define Py_TOUPPER(c) (_Py_ctype_toupper[Py_CHARMASK(c)])
  
  #endif /* !PYCTYPE_H */
  