-
Notifications
You must be signed in to change notification settings - Fork 0
/
ast.y
309 lines (295 loc) · 10.5 KB
/
ast.y
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
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
%{
#include<stdio.h>
#include<stdlib.h>
#include<string.h>
FILE *yyin;
extern int yylineno;
struct treeNode
{
char name[20];
struct treeNode* left;
struct treeNode* right;
char str1[100];
char str2[100];
};
struct treeNode *createNode(char *, struct treeNode *, struct treeNode *, char *, char *);
struct treeNode *head;
struct treeNode *tempNode1;
struct treeNode *tempNode2;
char temptype[50];
char temp[50];
char buffer[50];
char tempFunc[50];
char tempparams[100];
char extraval[20];
char templog[20];
char temprel[20];
int closure = 0;
int tempval;
void display();
int height(struct treeNode *);
void printLevel(struct treeNode *, int);
void yyerror(const char*);
int yylex();
%}
%name parse
%union
{
char *str;
int num;
struct treeNode *node;
};
%token INT MAIN OB CB SO SC CLOSURE COLON HASH INCLUDE LIBRARY
%token IF ELSE WHILE FOR CONT BRK RTRN SEMICOLON BINARYOR BINARYAND LT
%token GT LTE GTE NE EQ VOID CHAR COMMA EQUAL SUBPREFIX
%token ADD SUB MUL DIV ADDRIGHT SUBRIGHT MULRIGHT DIVRIGHT ADDPREFIX
%token<str> ID
%token<num> NUM
%type<num> E T F
%type<node> Main CompoundStmt Global GlobeDeclaration GlobeAssignExpr FunctionDefinition ClosureFunctionDefinition
%type<node> Stmt Function ClosureFunction Declaration FunctionCall AssignExpr SelectionStmt JumpStmt cond Expr
%type<node> relExp logExp VarList
%%
PreProcessorDirectives : HASH INCLUDE LIBRARY Global
{ head = createNode("Start", NULL, $4, "#include<stdio.h>", NULL);
printf("\n______________________________________________________\n");
printf("\nAST Successfully Created!!!\n\n");
display();
printf("\n______________________________________________________\n\n");}
;
Main : INT MAIN OB CB CompoundStmt Function '~' {$$ = createNode("Main", $5, $6, NULL, NULL); }
;
Identifier : ID {strcpy(temp,yylval.str);}
;
CompoundStmt : SO Stmt SC {$$ = $2;}
;
Global : FunctionDefinition Global {$$ = createNode("Global Sequence", $1, $2, NULL, NULL);}
| ClosureFunctionDefinition Global {$$ = createNode("Global Sequence", $1, $2, NULL, NULL);}
| GlobeDeclaration Global {$$ = createNode("Global Sequence", $1, $2, NULL, NULL);}
| Main {$$ = $1;}
;
GlobeDeclaration : Type VarList SEMICOLON {$$ = createNode("Declaration", NULL, $2, temptype, NULL); }
| Type GlobeAssignExpr {$$ = createNode("Declaration", NULL, $2, temptype, NULL); }
;
GlobeAssignExpr : Identifier EQUAL Extra COMMA GlobeAssignExpr { tempNode1 = createNode("=", NULL, NULL, temp, extraval);
$$ = createNode(",", tempNode1, $5, NULL, NULL);
}
| Identifier EQUAL Extra SEMICOLON { $$ = createNode("=", NULL, NULL, temp, extraval);}
;
FunctionDefinition : FunctionName OB CB SEMICOLON
{ if(closure)
$$ = createNode("Closure Definition", NULL, NULL, tempFunc, "no params");
else
{ $$ = createNode("Function Definition", NULL, NULL, tempFunc, "no params");
strcpy(tempparams, "");
strcpy(tempFunc, "");
closure = 0;
}
}
| FunctionName OB ParamsType CB SEMICOLON
{ if(closure)
$$ = createNode("Closure Definition", NULL, NULL, tempFunc, tempparams);
else
$$ = createNode("Function Definition", NULL, NULL, tempFunc, tempparams);
strcpy(tempparams, "");
strcpy(tempFunc, "");
closure = 0;
}
;
FunctionName : Type Identifier {strcat(temptype, " "); strcat(temptype, temp); strcpy(tempFunc, temptype);}
;
ParamsType : ParamsType COMMA Type {strcat(tempparams, temptype); strcat(tempparams, " ");}
| Type {strcat(tempparams, temptype); strcat(tempparams, " ");}
;
ClosureFunctionDefinition : CLOSURE COLON FunctionDefinition {$$ = $3;}
;
Stmt : Extra SEMICOLON Stmt {$$ = createNode("Sequence", NULL, $3, extraval, NULL); }
| Declaration Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| AssignExpr Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| SelectionStmt Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| JumpStmt Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| FunctionCall Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| CompoundStmt Stmt {$$ = createNode("Sequence", $1, $2, NULL, NULL); }
| error SEMICOLON {yyerrok; yyclearin; printf("missing ';'\n"); $$ = createNode("error", NULL, NULL, "semicolon missing", NULL);}
| {printf("");}
;
Function : FunctionName OB CB CompoundStmt Function { tempNode1 = createNode(tempFunc, NULL, $4, "no params", NULL);
$$ = createNode("Functions", tempNode1, $5, NULL, NULL);
strcpy(tempFunc,""); }
| FunctionName OB FunctionParams CB SO Stmt ClosureFunction Stmt SC Function
{ tempNode2 = createNode("Function Sequence", $6, $8, NULL, NULL);
tempNode1 = createNode(tempFunc, NULL, tempNode2, tempparams, NULL);
strcpy(tempparams, "");
strcpy(tempFunc,"");
tempNode2 = createNode("Closure Sequence", $7, $10, NULL, NULL);
$$ = createNode("Functions", NULL, tempNode1, tempNode2, NULL); }
| FunctionName OB CB SO Stmt ClosureFunction Stmt SC Function
{ tempNode2 = createNode("Function Sequence", $5, $7, NULL, NULL);
tempNode1 = createNode(tempFunc, NULL, tempNode2, "no params", NULL);
strcpy(tempparams, "");
strcpy(tempFunc,"");
tempNode2 = createNode("Closure Sequence", $6, $9, NULL, NULL);
$$ = createNode("Functions", NULL, tempNode1, tempNode2, NULL); }
| FunctionName OB FunctionParams CB CompoundStmt Function
{ tempNode1 = createNode(tempFunc, NULL, $5, tempparams, NULL);
$$ = createNode("Functions", tempNode1, $6, NULL, NULL);
strcpy(tempFunc,"");
strcpy(tempparams,""); }
| {printf("");}
;
ClosureFunction : CLOSURE COLON FunctionName OB CB SO Stmt SC
{ strcat(tempFunc, " closure");
$$ = createNode(tempFunc, NULL, $7, "no params", NULL);
strcpy(tempFunc, "");
}
| CLOSURE COLON FunctionName OB FunctionParams CB SO Stmt SC
{ strcat(tempFunc, " closure");
$$ = createNode(tempFunc, NULL, $8, tempparams, NULL);
strcpy(tempFunc, "");
strcpy(tempparams, "");
}
;
FunctionParams : FunctionParams COMMA Type Identifier {strcat(tempparams, temptype); strcat(tempparams, " ");
strcat(tempparams, temp); strcat(tempparams, ",");}
| Type Identifier {strcat(tempparams, temptype); strcat(tempparams, " ");
strcat(tempparams, temp);}
;
Declaration : Type VarList SEMICOLON {$$ = createNode("Declaration", NULL, $2, temptype, NULL); }
| Type AssignExpr {$$ = createNode("Declaration", NULL, $2, temptype, NULL); }
;
FunctionCall : Identifier EQUAL Identifier OB VarList CB SEMICOLON
{$$ = createNode("call", NULL, $5, temp, NULL); }
| Identifier OB VarList CB SEMICOLON
{$$ = createNode("call", NULL, $3, temp, NULL); }
;
AssignExpr : Identifier EQUAL Extra COMMA AssignExpr { tempNode1 = createNode("=", NULL, NULL, temp, extraval);
$$ = createNode(",", tempNode1, $5, NULL, NULL);
}
| Identifier EQUAL Extra SEMICOLON { $$ = createNode("=", NULL, NULL, temp, extraval); }
;
SelectionStmt : IF OB cond CB CompoundStmt {$$ = createNode("if", $3, $5, NULL, NULL); }
| IF OB cond CB CompoundStmt ELSE CompoundStmt {
tempNode1 = createNode("if", $3, $5, NULL, NULL);
tempNode2 = createNode("else", $7, NULL, NULL, NULL);
$$ = createNode("selection", tempNode1, tempNode2, NULL, NULL); }
;
JumpStmt : CONT SEMICOLON {$$ = createNode("continue", NULL, NULL, NULL, NULL); }
| BRK SEMICOLON {$$ = createNode("break", NULL, NULL, NULL, NULL); }
| RTRN Extra SEMICOLON {$$ = createNode("return", NULL, NULL, extraval, NULL); }
;
cond : Expr {$$ = createNode("cond", NULL, NULL, extraval, NULL); }
| Expr logOp Expr {$$ = createNode(templog, $1, $3, NULL, NULL); }
;
Expr : relExp {$$ = $1;}
| logExp {$$ = $1;}
;
relExp : Extra relOp E {sprintf(buffer, "%d", $3); $$ = createNode(temprel, NULL, NULL, extraval, buffer); }
;
logExp : Extra logOp E {sprintf(buffer, "%d", $3); $$ = createNode(templog, NULL, NULL, extraval, buffer); }
;
Extra : E {sprintf(buffer, "%d", $1); strcpy(extraval, buffer);}
;
logOp : BINARYOR {strcpy(templog, "||");}
| BINARYAND {strcpy(templog, "&&");}
;
relOp : LT {strcpy(temprel, "<");}
| GT {strcpy(temprel, ">");}
| LTE {strcpy(temprel, "<=");}
| GTE {strcpy(temprel, ">=");}
| NE {strcpy(temprel, "!=");}
| EQ {strcpy(temprel, "==");}
;
Type : INT {strcpy(temptype,"int");}
| VOID {strcpy(temptype,"void");}
| CHAR {strcpy(temptype,"char");}
;
VarList : VarList COMMA Identifier {$$ = createNode("varlist", $1, NULL, ",", temp); }
| Identifier { $$ = createNode("varlist", NULL, NULL, temp, NULL); }
;
E : E ADD T {$$ = $1 + $3;}
| E SUB T {$$ = $1 - $3;}
| T
;
T : T MUL F {$$ = $1 * $3;}
| T DIV F {$$ = $1 / $3;}
| F
;
F : ID {$$ = -1;}
| NUM {$$ = $1;}
| OB E CB {$$ = $2;}
;
%%
void yyerror(const char *msg)
{
fprintf(stderr, "WARNING : line %d : %s\n", yylineno, msg);
}
struct treeNode *createNode(char *n, struct treeNode *l, struct treeNode *r, char *s1, char *s2)
{
struct treeNode *temp = (struct treeNode *)(malloc(sizeof(struct treeNode)));
strcpy(temp -> name, n);
temp -> left = l;
temp -> right = r;
if(s1 == NULL)
strcpy(temp -> str1, "");
else
strcpy(temp -> str1, s1);
if(s2 == NULL)
strcpy(temp -> str2, "");
else
strcpy(temp -> str2, s2);
return temp;
}
void display()
{
struct treeNode *curr = head;
int ht = height(curr);
int i;
for(i = 1; i <= ht; ++i)
{
for(int space = 15 - i + 1; space > 0; space--)
printf("\t");
printf("level : %d [", i);
printLevel(curr, i);
printf("]");
printf("\n\n");
}
}
int height(struct treeNode *curr)
{
if(curr == NULL)
return 0;
else
{
int l = height(curr -> left);
int r = height(curr -> right);
if(l > r)
return (l + 1);
else
return(r + 1);
}
}
void printLevel(struct treeNode *curr, int level)
{
if(curr == NULL)
return;
if(level == 1)
printf("[ %s | %s | %s ]\t", curr -> name, curr -> str1, curr -> str2);
else if(level > 1)
{
printLevel(curr -> left, level - 1);
printLevel(curr -> right, level - 1);
}
}
int main()
{
head = (struct treeNode *)(malloc(sizeof(struct treeNode)));
tempNode1 = (struct treeNode *)(malloc(sizeof(struct treeNode)));
tempNode2 = (struct treeNode *)(malloc(sizeof(struct treeNode)));
yyin = fopen("out.c", "r");
if(!yyparse())
;
else
printf("Invalid");
fclose(yyin);
return 0;
}