aboutsummaryrefslogtreecommitdiff
path: root/bin/sh/arith_lex.l
blob: 1113d29929701aa3af6d4330827464132a058a1b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
%{
/*-
 * Copyright (c) 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Kenneth Almquist.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#if 0
#ifndef lint
static char sccsid[] = "@(#)arith_lex.l	8.3 (Berkeley) 5/4/95";
#endif
#endif /* not lint */

#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");

#include <string.h>

#include "arith.h"
#include "shell.h"
#include "y.tab.h"
#include "error.h"
#include "memalloc.h"
#include "var.h"

int yylex(void);

#undef YY_INPUT
#define YY_INPUT(buf,result,max) \
	result = (*buf = *arith_buf++) ? 1 : YY_NULL;
#define YY_NO_UNPUT
#define YY_NO_INPUT
%}

%%
[ \t\n]	{ ; }

0x[a-fA-F0-9]+	{
			yylval.l_value = strtoarith_t(yytext, NULL, 16);
			return ARITH_NUM;
		}

0[0-7]+		{
			yylval.l_value = strtoarith_t(yytext, NULL, 8);
			return ARITH_NUM;
		}

[0-9]+		{
			yylval.l_value = strtoarith_t(yytext, NULL, 10);
			return ARITH_NUM;
		}

[A-Za-z][A-Za-z0-9_]*	{
			/*
			 * If variable doesn't exist, we should initialize
			 * it to zero.
			 */
			char *temp;
			if (lookupvar(yytext) == NULL)
				setvarsafe(yytext, "0", 0);
			temp = stalloc(strlen(yytext) + 1);
			yylval.s_value = strcpy(temp, yytext);

			return ARITH_VAR;
		}

"("		{	return ARITH_LPAREN;	}
")"		{	return ARITH_RPAREN;	}
"||"		{	return ARITH_OR;	}
"&&"		{	return ARITH_AND;	}
"|"		{	return ARITH_BOR;	}
"^"		{	return ARITH_BXOR;	}
"&"		{	return ARITH_BAND;	}
"=="		{	return ARITH_EQ;	}
"!="		{	return ARITH_NE;	}
">"		{	return ARITH_GT;	}
">="		{	return ARITH_GE;	}
"<"		{	return ARITH_LT;	}
"<="		{	return ARITH_LE;	}
"<<"		{	return ARITH_LSHIFT;	}
">>"		{	return ARITH_RSHIFT;	}
"*"		{	return ARITH_MUL;	}
"/"		{	return ARITH_DIV;	}
"%"		{	return ARITH_REM;	}
"+"		{	return ARITH_ADD;	}
"-"		{	return ARITH_SUB;	}
"~"		{	return ARITH_BNOT;	}
"!"		{	return ARITH_NOT;	}
"="		{	return ARITH_ASSIGN;	}
"+="		{	return ARITH_ADDASSIGN;	}
"-="		{	return ARITH_SUBASSIGN;	}
"*="		{	return ARITH_MULASSIGN;	}
"/="		{	return ARITH_DIVASSIGN;	}
"%="		{	return ARITH_REMASSIGN;	}
">>="		{	return ARITH_RSHASSIGN;	}
"<<="		{	return ARITH_LSHASSIGN;	}
"&="		{	return ARITH_BANDASSIGN; }
"^="		{	return ARITH_BXORASSIGN; }
"|="		{	return ARITH_BORASSIGN;	}
.		{
			error("arith: syntax error: \"%s\"\n", arith_startbuf);
		}
%%

void
arith_lex_reset(void)
{
	YY_NEW_FILE;
}