boost/spirit/home/support/char_encoding/ascii.hpp
/*=============================================================================
Copyright (c) 2001-2011 Hartmut Kaiser
Copyright (c) 2001-2011 Joel de Guzman
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
=============================================================================*/
#if !defined(BOOST_SPIRIT_ASCII_APRIL_26_2006_1106PM)
#define BOOST_SPIRIT_ASCII_APRIL_26_2006_1106PM
#if defined(_MSC_VER)
#pragma once
#endif
#include <climits>
#include <boost/assert.hpp>
#include <boost/cstdint.hpp>
///////////////////////////////////////////////////////////////////////////////
// constants used to classify the single characters
///////////////////////////////////////////////////////////////////////////////
#define BOOST_CC_DIGIT 0x0001
#define BOOST_CC_XDIGIT 0x0002
#define BOOST_CC_ALPHA 0x0004
#define BOOST_CC_CTRL 0x0008
#define BOOST_CC_LOWER 0x0010
#define BOOST_CC_UPPER 0x0020
#define BOOST_CC_SPACE 0x0040
#define BOOST_CC_PUNCT 0x0080
namespace boost { namespace spirit { namespace char_encoding
{
// The detection of isgraph(), isprint() and isblank() is done programmatically
// to keep the character type table small. Additionally, these functions are
// rather seldom used and the programmatic detection is very simple.
///////////////////////////////////////////////////////////////////////////
// ASCII character classification table
///////////////////////////////////////////////////////////////////////////
const unsigned char ascii_char_types[] =
{
/* NUL 0 0 */ BOOST_CC_CTRL,
/* SOH 1 1 */ BOOST_CC_CTRL,
/* STX 2 2 */ BOOST_CC_CTRL,
/* ETX 3 3 */ BOOST_CC_CTRL,
/* EOT 4 4 */ BOOST_CC_CTRL,
/* ENQ 5 5 */ BOOST_CC_CTRL,
/* ACK 6 6 */ BOOST_CC_CTRL,
/* BEL 7 7 */ BOOST_CC_CTRL,
/* BS 8 8 */ BOOST_CC_CTRL,
/* HT 9 9 */ BOOST_CC_CTRL|BOOST_CC_SPACE,
/* NL 10 a */ BOOST_CC_CTRL|BOOST_CC_SPACE,
/* VT 11 b */ BOOST_CC_CTRL|BOOST_CC_SPACE,
/* NP 12 c */ BOOST_CC_CTRL|BOOST_CC_SPACE,
/* CR 13 d */ BOOST_CC_CTRL|BOOST_CC_SPACE,
/* SO 14 e */ BOOST_CC_CTRL,
/* SI 15 f */ BOOST_CC_CTRL,
/* DLE 16 10 */ BOOST_CC_CTRL,
/* DC1 17 11 */ BOOST_CC_CTRL,
/* DC2 18 12 */ BOOST_CC_CTRL,
/* DC3 19 13 */ BOOST_CC_CTRL,
/* DC4 20 14 */ BOOST_CC_CTRL,
/* NAK 21 15 */ BOOST_CC_CTRL,
/* SYN 22 16 */ BOOST_CC_CTRL,
/* ETB 23 17 */ BOOST_CC_CTRL,
/* CAN 24 18 */ BOOST_CC_CTRL,
/* EM 25 19 */ BOOST_CC_CTRL,
/* SUB 26 1a */ BOOST_CC_CTRL,
/* ESC 27 1b */ BOOST_CC_CTRL,
/* FS 28 1c */ BOOST_CC_CTRL,
/* GS 29 1d */ BOOST_CC_CTRL,
/* RS 30 1e */ BOOST_CC_CTRL,
/* US 31 1f */ BOOST_CC_CTRL,
/* SP 32 20 */ BOOST_CC_SPACE,
/* ! 33 21 */ BOOST_CC_PUNCT,
/* " 34 22 */ BOOST_CC_PUNCT,
/* # 35 23 */ BOOST_CC_PUNCT,
/* $ 36 24 */ BOOST_CC_PUNCT,
/* % 37 25 */ BOOST_CC_PUNCT,
/* & 38 26 */ BOOST_CC_PUNCT,
/* ' 39 27 */ BOOST_CC_PUNCT,
/* ( 40 28 */ BOOST_CC_PUNCT,
/* ) 41 29 */ BOOST_CC_PUNCT,
/* * 42 2a */ BOOST_CC_PUNCT,
/* + 43 2b */ BOOST_CC_PUNCT,
/* , 44 2c */ BOOST_CC_PUNCT,
/* - 45 2d */ BOOST_CC_PUNCT,
/* . 46 2e */ BOOST_CC_PUNCT,
/* / 47 2f */ BOOST_CC_PUNCT,
/* 0 48 30 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 1 49 31 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 2 50 32 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 3 51 33 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 4 52 34 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 5 53 35 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 6 54 36 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 7 55 37 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 8 56 38 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* 9 57 39 */ BOOST_CC_DIGIT|BOOST_CC_XDIGIT,
/* : 58 3a */ BOOST_CC_PUNCT,
/* ; 59 3b */ BOOST_CC_PUNCT,
/* < 60 3c */ BOOST_CC_PUNCT,
/* = 61 3d */ BOOST_CC_PUNCT,
/* > 62 3e */ BOOST_CC_PUNCT,
/* ? 63 3f */ BOOST_CC_PUNCT,
/* @ 64 40 */ BOOST_CC_PUNCT,
/* A 65 41 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* B 66 42 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* C 67 43 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* D 68 44 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* E 69 45 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* F 70 46 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_UPPER,
/* G 71 47 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* H 72 48 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* I 73 49 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* J 74 4a */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* K 75 4b */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* L 76 4c */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* M 77 4d */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* N 78 4e */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* O 79 4f */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* P 80 50 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* Q 81 51 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* R 82 52 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* S 83 53 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* T 84 54 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* U 85 55 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* V 86 56 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* W 87 57 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* X 88 58 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* Y 89 59 */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* Z 90 5a */ BOOST_CC_ALPHA|BOOST_CC_UPPER,
/* [ 91 5b */ BOOST_CC_PUNCT,
/* \ 92 5c */ BOOST_CC_PUNCT,
/* ] 93 5d */ BOOST_CC_PUNCT,
/* ^ 94 5e */ BOOST_CC_PUNCT,
/* _ 95 5f */ BOOST_CC_PUNCT,
/* ` 96 60 */ BOOST_CC_PUNCT,
/* a 97 61 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* b 98 62 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* c 99 63 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* d 100 64 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* e 101 65 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* f 102 66 */ BOOST_CC_ALPHA|BOOST_CC_XDIGIT|BOOST_CC_LOWER,
/* g 103 67 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* h 104 68 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* i 105 69 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* j 106 6a */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* k 107 6b */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* l 108 6c */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* m 109 6d */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* n 110 6e */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* o 111 6f */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* p 112 70 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* q 113 71 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* r 114 72 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* s 115 73 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* t 116 74 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* u 117 75 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* v 118 76 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* w 119 77 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* x 120 78 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* y 121 79 */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* z 122 7a */ BOOST_CC_ALPHA|BOOST_CC_LOWER,
/* { 123 7b */ BOOST_CC_PUNCT,
/* | 124 7c */ BOOST_CC_PUNCT,
/* } 125 7d */ BOOST_CC_PUNCT,
/* ~ 126 7e */ BOOST_CC_PUNCT,
/* DEL 127 7f */ BOOST_CC_CTRL,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
};
///////////////////////////////////////////////////////////////////////////
// Test characters for specified conditions (using ASCII)
///////////////////////////////////////////////////////////////////////////
struct ascii
{
typedef char char_type;
typedef unsigned char classify_type;
static bool
isascii_(int ch)
{
return 0 == (ch & ~0x7f);
}
static bool
ischar(int ch)
{
return isascii_(ch);
}
// *** Note on assertions: The precondition is that the calls to
// these functions do not violate the required range of ch (type int)
// which is that strict_ischar(ch) should be true. It is the
// responsibility of the caller to make sure this precondition is not
// violated.
static bool
strict_ischar(int ch)
{
return ch >= 0 && ch <= 127;
}
static bool
isalnum(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_ALPHA)
|| (ascii_char_types[ch] & BOOST_CC_DIGIT);
}
static bool
isalpha(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_ALPHA) ? true : false;
}
static bool
isdigit(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_DIGIT) ? true : false;
}
static bool
isxdigit(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_XDIGIT) ? true : false;
}
static bool
iscntrl(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_CTRL) ? true : false;
}
static bool
isgraph(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return ('\x21' <= ch && ch <= '\x7e');
}
static bool
islower(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_LOWER) ? true : false;
}
static bool
isprint(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return ('\x20' <= ch && ch <= '\x7e');
}
static bool
ispunct(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_PUNCT) ? true : false;
}
static bool
isspace(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_SPACE) ? true : false;
}
static bool
isblank BOOST_PREVENT_MACRO_SUBSTITUTION (int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return ('\x09' == ch || '\x20' == ch);
}
static bool
isupper(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return (ascii_char_types[ch] & BOOST_CC_UPPER) ? true : false;
}
///////////////////////////////////////////////////////////////////////
// Simple character conversions
///////////////////////////////////////////////////////////////////////
static int
tolower(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return isupper(ch) ? (ch - 'A' + 'a') : ch;
}
static int
toupper(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return islower(ch) ? (ch - 'a' + 'A') : ch;
}
static ::boost::uint32_t
toucs4(int ch)
{
BOOST_ASSERT(strict_ischar(ch));
return ch;
}
};
}}}
///////////////////////////////////////////////////////////////////////////////
// undefine macros
///////////////////////////////////////////////////////////////////////////////
#undef BOOST_CC_DIGIT
#undef BOOST_CC_XDIGIT
#undef BOOST_CC_ALPHA
#undef BOOST_CC_CTRL
#undef BOOST_CC_LOWER
#undef BOOST_CC_UPPER
#undef BOOST_CC_PUNCT
#undef BOOST_CC_SPACE
#endif
