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/* Copyright (c) 2003-2004, Roger Dingledine
* Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
* Copyright (c) 2007-2020, The Tor Project, Inc. */
/* See LICENSE for licensing information */
/**
* \file compat_ctype.h
* \brief Locale-independent character-type inspection (header)
**/
#ifndef TOR_COMPAT_CTYPE_H
#define TOR_COMPAT_CTYPE_H
#include "orconfig.h"
#include "lib/cc/torint.h"
/* Much of the time when we're checking ctypes, we're doing spec compliance,
* which all assumes we're doing ASCII. */
#define DECLARE_CTYPE_FN(name) \
static int TOR_##name(char c); \
extern const uint32_t TOR_##name##_TABLE[]; \
static inline int TOR_##name(char c) { \
uint8_t u = c; \
return !!(TOR_##name##_TABLE[(u >> 5) & 7] & (1u << (u & 31))); \
}
DECLARE_CTYPE_FN(ISALPHA)
DECLARE_CTYPE_FN(ISALNUM)
DECLARE_CTYPE_FN(ISSPACE)
DECLARE_CTYPE_FN(ISDIGIT)
DECLARE_CTYPE_FN(ISXDIGIT)
DECLARE_CTYPE_FN(ISPRINT)
DECLARE_CTYPE_FN(ISLOWER)
DECLARE_CTYPE_FN(ISUPPER)
extern const uint8_t TOR_TOUPPER_TABLE[];
extern const uint8_t TOR_TOLOWER_TABLE[];
#define TOR_TOLOWER(c) (TOR_TOLOWER_TABLE[(uint8_t)c])
#define TOR_TOUPPER(c) (TOR_TOUPPER_TABLE[(uint8_t)c])
static inline int hex_decode_digit(char c);
/** Helper: given a hex digit, return its value, or -1 if it isn't hex. */
static inline int
hex_decode_digit(char c)
{
switch (c) {
case '0': return 0;
case '1': return 1;
case '2': return 2;
case '3': return 3;
case '4': return 4;
case '5': return 5;
case '6': return 6;
case '7': return 7;
case '8': return 8;
case '9': return 9;
case 'A': case 'a': return 10;
case 'B': case 'b': return 11;
case 'C': case 'c': return 12;
case 'D': case 'd': return 13;
case 'E': case 'e': return 14;
case 'F': case 'f': return 15;
default:
return -1;
}
}
#endif /* !defined(TOR_COMPAT_CTYPE_H) */
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