1 /*

     2  charencode.h - miscellaneous character encoding

     3 

     4  This software may be used and distributed according to the terms of

     5  the GNU General Public License, incorporated herein by reference.

     6 */

     7 

     8 #ifndef _HG_CHARENCODE_H_

     9 #define _HG_CHARENCODE_H_

    10 

    11 #include <Python.h>

    12 #include "compat.h"

    13 

    14 /* This should be kept in sync with normcasespecs in encoding.py. */

    15 enum normcase_spec {

    16 	NORMCASE_LOWER = -1,

    17 	NORMCASE_UPPER = 1,

    18 	NORMCASE_OTHER = 0

    19 };

    20 

    21 PyObject *unhexlify(const char *str, int len);

    22 PyObject *asciilower(PyObject *self, PyObject *args);

    23 PyObject *asciiupper(PyObject *self, PyObject *args);

    24 PyObject *make_file_foldmap(PyObject *self, PyObject *args);

    25 

    26 static const int8_t hextable[256] = {

    27 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    28 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    29 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    30 	 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, -1, -1, -1, -1, -1, -1, /* 0-9 */

    31 	-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* A-F */

    32 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    33 	-1, 10, 11, 12, 13, 14, 15, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* a-f */

    34 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    35 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    36 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    37 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    38 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    39 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    40 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    41 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,

    42 	-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1

    43 };

    44 

    45 static inline int hexdigit(const char *p, Py_ssize_t off)

    46 {

    47 	int8_t val = hextable[(unsigned char)p[off]];

    48 

    49 	if (val >= 0) {

    50 		return val;

    51 	}

    52 

    53 	PyErr_SetString(PyExc_ValueError, "input contains non-hex character");

    54 	return 0;

    55 }

    56 

    57 #endif /* _HG_CHARENCODE_H_ */