recparser/monga.l at master · flaviocdc/recparser · GitHub

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
136
137
138
139
140
141
142
143
144

%{

#include <stdio.h>
#include <errno.h>
#include <limits.h>
#include <float.h>
#include "decl.h"

int alloc_sval = 0;

%}

%option yylineno

%%

"while"		{ return TK_WHILE; }

"if"		{ return TK_IF; }

"else"		{ return TK_ELSE; }

"int"		{ return TK_TINT; }

"char"		{ return TK_TCHAR; }

"float"		{ return TK_TFLOAT; }

"return"	{ return TK_RETURN; }

"void"		{ return TK_TVOID; }

"..."    {return TK_MANY; }

[=]		{ return '='; }

[*]		{ return '*'; }

[/]		{ return '/'; }

[+]		{ return '+'; }

[-]		{ return '-'; }

[\^]   { return '^'; }

"=="		{ return TK_EQ; }

"!="		{ return TK_NEQ; }

"<="		{ return TK_LEQ; }

">="		{ return TK_GEQ; }

"&&"		{ return TK_AND; }

"||"		{ return TK_OR; }

[<]		{ return '<'; }

[>]		{ return '>'; }

[!]		{ return '!'; }

[(]		{ return '('; }

[)]		{ return ')'; }

[;]		{ return ';'; }

[,]		{ return ','; }

[\[]		{ return '['; }

[\]]		{ return ']'; }

[{]		{ return '{'; }

[}]		{ return '}'; }

[_a-zA-Z][_0-9a-zA-Z]*	{
        yyval.sval = (char*)malloc(yyleng + 1);
        if(!yyval.sval) return ERR_MEM;
        strcpy(yyval.sval, yytext);
			  return TK_ID;
			}

[0-9]+  {
	  long val;
	  val = strtol(yytext, NULL, 10);
    if(errno != ERANGE && val <= INT_MAX && val >= INT_MIN) { yyval.ival = (int)val; return TK_INT; } else return ERR_IRANGE;
	}

"0x"[0-9a-fA-F]+ {
		   long val;
		   val = strtol(yytext+2, NULL, 16);
       if(errno != ERANGE && val <= INT_MAX && val >= INT_MIN) { yyval.ival = (int)val; return TK_INT; } else return ERR_IRANGE;
		 }

[0-9]+"."[0-9]*([eE][+-]?[0-9]+)?  |
"."[0-9]+([eE][+-]?[0-9]+)?        |
[0-9]+([eE][+-]?[0-9]+)            {
             yyval.fval = strtod(yytext, NULL);
				     if(errno != ERANGE) return TK_FLOAT; else return ERR_FRANGE;
                                   }

"\""([^\n\\\"]|"\\n"|"\\t"|"\\\\"|"\\\"")*"\""	{
						  int i, j;
						  i = 1; j = 0;

              yyval.sval = (char*)malloc(yyleng);
              if(!yyval.sval) return ERR_MEM;

						  while(i < (yyleng -1)) {
						    if(yytext[i]=='\\' && yytext[i+1]=='n') {
						      yyval.sval[j] = '\n';
						      i++;
						    } else if(yytext[i]=='\\' && yytext[i+1]=='t') {
						      yyval.sval[j] = '\t';
						      i++;
						    } else if(yytext[i]=='\\' && yytext[i+1]=='"') {
						      yyval.sval[j] = '\"';
						      i++;
						    } else if(yytext[i]=='\\' && yytext[i+1]=='\\') {
						      yyval.sval[j] = '\\';
						      i++;
						    } else yyval.sval[j] = yytext[i];
						    i++;
						    j++;
						  }
						  yyval.sval[j] = 0;
						  return TK_STRING;
						}

"/*"([^*]|[*]+[^/*])*[*]*"*/"   ;

" "|\n|\r|\t ;

.  { return ERR_SCAN; }

%%

int yywrap() { return 1; }