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
|
#ifndef SEMANTICS_H
#define SEMANTICS_H
#include "const.h"
typedef struct CNode CNode;
typedef struct CTable *CTable_t;
typedef struct CType CType;
typedef CType *CType_t;
typedef struct CVar CVar;
typedef CVar *CVar_t;
struct CVar {
const char *name;
CVar_t next; /* next in the linked list */
CType_t type;
int offset;
CNode *ast;
};
CVar_t cvar_create(const char *name, CType_t type, CNode *ast);
void cvar_print(CVar_t cv);
struct CType {
enum {
CINT,
CCHAR,
CVOID,
CSTRUCT,
CUNION,
CARR,
CPTR,
CFUNC
} type;
const char *name;
CType_t next;
union {
CTable_t fields; /* for a struct or union */
CType_t ref; /* for a pointer */
struct {
CType_t elem;
int len;
} arr; /* for an array */
struct {
CVar_t params;
CVar_t local;
CType_t ret;
CNode *body;
} func; /* for a function */
} rec;
int size; /* memory footprint */
CNode *ast;
};
CType_t ctype_create(const char *name, int type, CNode *ast);
void ctype_debug_print(CType_t ct);
typedef unsigned int (*Hashfunc_t) (const char *);
#ifdef CIBIC_DEBUG
typedef const char *(*Printfunc_t) (void *);
#endif
typedef struct CTNode CTNode;
struct CTNode {
const char *key;
void *val;
CTNode *next;
int lvl;
};
typedef struct CTable {
CTNode *head[MAX_TABLE_SIZE];
Hashfunc_t hfunc;
#ifdef CIBIC_DEBUG
Printfunc_t pfunc;
#endif
} CTable;
#ifdef CIBIC_DEBUG
CTable_t ctable_create(Hashfunc_t hfunc, Printfunc_t pfunc);
#else
CTable_t ctable_create(Hashfunc_t hfunc);
#endif
void ctable_destroy(CTable_t ct);
void *ctable_lookup(CTable_t ct, const char *key);
int ctable_insert(CTable_t ct, const char *key, void *val, int lvl);
void ctable_clip(CTable_t ct, const char *key, int max_lvl);
void ctable_debug_print(CTable_t ct);
typedef struct CSVar CSVar;
struct CSVar {
CVar_t var;
CSVar *next;
};
typedef struct CSType CSType;
struct CSType {
CType_t type;
CSType *next;
};
typedef struct CSNode CSNode;
struct CSNode {
CSVar *vhead;
CSType *thead;
CSNode *next;
};
typedef struct CScope CScope;
typedef CScope *CScope_t;
struct CScope {
int lvl;
CType_t func;
int inside_loop;
CSNode *top;
CTable_t tvar;
CTable_t ttype;
};
typedef struct ExpType {
CType_t type;
int lval;
} ExpType;
CScope_t cscope_create();
CVar_t cscope_lookup_var(CScope_t cs, const char *name);
CType_t cscope_lookup_type(CScope_t cs, const char *name);
int cscope_push_var(CScope_t cs, CVar_t var);
int cscope_push_type(CScope_t cs, CType_t type);
void cscope_enter(CScope_t cs);
void cscope_exit(CScope_t cs);
void cscope_debug_print(CScope_t cs);
unsigned int bkdr_hash(const char *str);
const char *ctable_cvar_print(void *var);
const char *ctable_ctype_print(void *type);
void semantics_check(CNode *ast);
#endif
|