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WebSVN – tendra.SVN – Blame – /branches/tendra5-amd64/src/utilities/lexi/lexer.h – Rev 6

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2 7u83 1 
/*
2 
    		 Crown Copyright (c) 1997
3 
 
4 
    This TenDRA(r) Computer Program is subject to Copyright
5 
    owned by the United Kingdom Secretary of State for Defence
6 
    acting through the Defence Evaluation and Research Agency
7 
    (DERA).  It is made available to Recipients with a
8 
    royalty-free licence for its use, reproduction, transfer
9 
    to other parties and amendment for any purpose not excluding
10 
    product development provided that any such use et cetera
11 
    shall be deemed to be acceptance of the following conditions:-
12 
 
13 
        (1) Its Recipients shall ensure that this Notice is
14 
        reproduced upon any copies or amended versions of it;
15 
 
16 
        (2) Any amended version of it shall be clearly marked to
17 
        show both the nature of and the organisation responsible
18 
        for the relevant amendment or amendments;
19 
 
20 
        (3) Its onward transfer from a recipient to another
21 
        party shall be deemed to be that party's acceptance of
22 
        these conditions;
23 
 
24 
        (4) DERA gives no warranty or assurance as to its
25 
        quality or suitability for any purpose and DERA accepts
26 
        no liability whatsoever in relation to any use to which
27 
        it may be put.
28 
*/
29 
 
30 
/*
6 7u83 31 
 *  AUTOMATICALLY GENERATED BY lexi VERSION 1.2
32 
 */
2 7u83 33 
 
34 
 
35 
/* LOOKUP TABLE */
36 
 
6 7u83 37 
static unsigned char lookup_tab[257] = {
2 7u83 38 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
39 
    0x0000, 0x0001, 0x0001, 0x0000, 0x0000, 0x0001, 0x0000, 0x0000,
40 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
41 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
42 
    0x0001, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
43 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
44 
    0x000c, 0x000c, 0x000c, 0x000c, 0x000c, 0x000c, 0x000c, 0x000c,
45 
    0x000c, 0x000c, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
46 
    0x0000, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
47 
    0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
48 
    0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
49 
    0x000a, 0x000a, 0x000a, 0x0000, 0x0000, 0x0000, 0x0000, 0x000a,
50 
    0x0000, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
51 
    0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
52 
    0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a, 0x000a,
53 
    0x000a, 0x000a, 0x000a, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
54 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
55 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
56 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
57 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
58 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
59 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
60 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
61 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
62 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
63 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
64 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
65 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
66 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
67 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
68 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
69 
    0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
70 
    0x0000
6 7u83 71 
};
2 7u83 72 
 
73 
#ifndef LEX_EOF
6 7u83 74 
#define LEX_EOF		256
2 7u83 75 
#endif
76 
 
6 7u83 77 
#define lookup_char(C)	((int)lookup_tab[(C)])
78 
#define is_white(T)	((T) & 0x0001)
79 
#define is_alpha(T)	((T) & 0x0002)
80 
#define is_digit(T)	((T) & 0x0004)
81 
#define is_alphanum(T)	((T) & 0x0008)
2 7u83 82 
 
83 
 
84 
/* MAIN PASS ANALYSER */
85 
 
6 7u83 86 
int
87 
read_token(void)
2 7u83 88 
{
6 7u83 89 
    start: {
90 
	int c0 = read_char(), t0;
91 
	t0 = lookup_char(c0);
92 
	if (is_white(t0)) goto start;
93 
	switch (c0) {
94 
	    case '"': {
95 
		return(get_string(c0));
2 7u83 96 
	    }
6 7u83 97 
	    case '$': {
98 
		int c1 = read_char(), t1;
99 
		t1 = lookup_char(c1);
100 
		if (is_alpha(t1)) {
101 
		    return(get_sid_ident(c0, c1));
2 7u83 102 
		}
6 7u83 103 
		unread_char(c1);
104 
		break;
2 7u83 105 
	    }
6 7u83 106 
	    case '(': {
107 
		return(lex_open);
2 7u83 108 
	    }
6 7u83 109 
	    case ')': {
110 
		return(lex_close);
2 7u83 111 
	    }
6 7u83 112 
	    case '+': {
113 
		return(lex_plus);
2 7u83 114 
	    }
6 7u83 115 
	    case '-': {
116 
		int c1 = read_char();
117 
		if (c1 == '>') {
118 
		    return(lex_arrow);
2 7u83 119 
		}
6 7u83 120 
		unread_char(c1);
121 
		break;
2 7u83 122 
	    }
6 7u83 123 
	    case '/': {
124 
		int c1 = read_char();
125 
		if (c1 == '*') {
126 
		    return(get_comment(c0, c1));
2 7u83 127 
		}
6 7u83 128 
		unread_char(c1);
129 
		break;
2 7u83 130 
	    }
6 7u83 131 
	    case ';': {
132 
		return(lex_semicolon);
2 7u83 133 
	    }
6 7u83 134 
	    case '=': {
135 
		return(lex_equal);
2 7u83 136 
	    }
6 7u83 137 
	    case '{': {
138 
		int c1 = read_char();
139 
		if (c1 == '0') {
140 
		    int c2 = read_char();
141 
		    if (c2 == '-') {
142 
			int c3 = read_char();
143 
			if (c3 == '9') {
144 
			    int c4 = read_char();
145 
			    if (c4 == '}') {
146 
				return(lex_digit);
2 7u83 147 
			    }
6 7u83 148 
			    unread_char(c4);
2 7u83 149 
			}
6 7u83 150 
			unread_char(c3);
2 7u83 151 
		    }
6 7u83 152 
		    unread_char(c2);
153 
		} else if (c1 == 'A') {
154 
		    int c2 = read_char();
155 
		    if (c2 == '-') {
156 
			int c3 = read_char();
157 
			if (c3 == 'Z') {
158 
			    int c4 = read_char();
159 
			    if (c4 == '}') {
160 
				return(lex_upper);
2 7u83 161 
			    }
6 7u83 162 
			    unread_char(c4);
2 7u83 163 
			}
6 7u83 164 
			unread_char(c3);
2 7u83 165 
		    }
6 7u83 166 
		    unread_char(c2);
167 
		} else if (c1 == 'a') {
168 
		    int c2 = read_char();
169 
		    if (c2 == '-') {
170 
			int c3 = read_char();
171 
			if (c3 == 'z') {
172 
			    int c4 = read_char();
173 
			    if (c4 == '}') {
174 
				return(lex_lower);
2 7u83 175 
			    }
6 7u83 176 
			    unread_char(c4);
2 7u83 177 
			}
6 7u83 178 
			unread_char(c3);
2 7u83 179 
		    }
6 7u83 180 
		    unread_char(c2);
2 7u83 181 
		}
6 7u83 182 
		unread_char(c1);
183 
		return(lex_open_Hbrace);
2 7u83 184 
	    }
6 7u83 185 
	    case '}': {
186 
		return(lex_close_Hbrace);
2 7u83 187 
	    }
6 7u83 188 
	    case LEX_EOF: {
189 
		return(lex_eof);
2 7u83 190 
	    }
191 
	}
6 7u83 192 
	if (is_alpha(t0)) {
193 
	    return(get_identifier(c0));
2 7u83 194 
	}
6 7u83 195 
	return(unknown_token(c0));
2 7u83 196 
    }
197 
}