622ba74a3886947300502334ebb4b89b2562791a
8 static const char *binop_str
[] = {
9 [binor
] = "||", [binand
] = "&&", [eq
] = "==", [neq
] = "!=",
10 [leq
] = "<=", [le
] = "<", [geq
] = ">=", [ge
] = ">", [cons
] = ":",
11 [plus
] = "+", [minus
] = "-", [times
] = "*", [divide
] = "/",
12 [modulo
] = "%", [power
] = "^",
14 static const char *fieldspec_str
[] = {
15 [fst
] = "fst", [snd
] = "snd", [hd
] = "hd", [tl
] = "tl"};
16 static const char *unop_str
[] = { [inverse
] = "!", [negate
] = "-", };
18 struct ast
*ast(struct list
*decls
)
20 struct ast
*res
= safe_malloc(sizeof(struct ast
));
21 res
->decls
= (struct decl
**)list_to_array(decls
, &res
->ndecls
, true);
25 struct decl
*decl_fun(char *ident
, struct list
*args
, struct list
*body
)
27 struct decl
*res
= safe_malloc(sizeof(struct decl
));
29 res
->data
.dfun
.ident
= ident
;
30 res
->data
.dfun
.args
= (char **)
31 list_to_array(args
, &res
->data
.dfun
.nargs
, true);
32 res
->data
.dfun
.body
= (struct stmt
**)
33 list_to_array(body
, &res
->data
.dfun
.nbody
, true);
37 struct decl
*decl_var(struct vardecl vardecl
)
39 struct decl
*res
= safe_malloc(sizeof(struct decl
));
41 res
->data
.dvar
= vardecl
;
45 struct stmt
*stmt_assign(char *ident
, struct expr
*expr
)
47 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
49 res
->data
.sassign
.ident
= ident
;
50 res
->data
.sassign
.expr
= expr
;
54 struct stmt
*stmt_if(struct expr
*pred
, struct list
*then
, struct list
*els
)
56 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
58 res
->data
.sif
.pred
= pred
;
59 res
->data
.sif
.then
= (struct stmt
**)
60 list_to_array(then
, &res
->data
.sif
.nthen
, true);
61 res
->data
.sif
.els
= (struct stmt
**)
62 list_to_array(els
, &res
->data
.sif
.nels
, true);
66 struct stmt
*stmt_return(struct expr
*rtrn
)
68 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
70 res
->data
.sreturn
= rtrn
;
74 struct stmt
*stmt_expr(struct expr
*expr
)
76 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
78 res
->data
.sexpr
= expr
;
82 struct stmt
*stmt_vardecl(struct vardecl vardecl
)
84 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
86 res
->data
.svardecl
= vardecl
;
90 struct stmt
*stmt_while(struct expr
*pred
, struct list
*body
)
92 struct stmt
*res
= safe_malloc(sizeof(struct stmt
));
94 res
->data
.swhile
.pred
= pred
;
95 res
->data
.swhile
.body
= (struct stmt
**)
96 list_to_array(body
, &res
->data
.swhile
.nbody
, true);
100 struct expr
*expr_binop(struct expr
*l
, enum binop op
, struct expr
*r
)
102 struct expr
*res
= safe_malloc(sizeof(struct expr
));
104 res
->data
.ebinop
.l
= l
;
105 res
->data
.ebinop
.op
= op
;
106 res
->data
.ebinop
.r
= r
;
110 struct expr
*expr_bool(bool b
)
112 struct expr
*res
= safe_malloc(sizeof(struct expr
));
119 if (c
>= '0' && c
<= '9')
121 if (c
>= 'a' && c
<= 'f')
123 if (c
>= 'A' && c
<= 'F')
128 struct expr
*expr_char(const char *c
)
130 struct expr
*res
= safe_malloc(sizeof(struct expr
));
134 res
->data
.echar
= c
[1];
138 case '0': res
->data
.echar
= '\0'; break;
139 case 'a': res
->data
.echar
= '\a'; break;
140 case 'b': res
->data
.echar
= '\b'; break;
141 case 't': res
->data
.echar
= '\t'; break;
142 case 'v': res
->data
.echar
= '\v'; break;
143 case 'f': res
->data
.echar
= '\f'; break;
144 case 'r': res
->data
.echar
= '\r'; break;
148 res
->data
.echar
= (fromHex(c
[3])<<4)+fromHex(c
[4]);
152 struct expr
*expr_funcall(char *ident
, struct list
*args
)
154 struct expr
*res
= safe_malloc(sizeof(struct expr
));
155 res
->type
= efuncall
;
156 res
->data
.efuncall
.ident
= ident
;
157 res
->data
.efuncall
.args
= (struct expr
**)
158 list_to_array(args
, &res
->data
.efuncall
.nargs
, true);
162 struct expr
*expr_int(int integer
)
164 struct expr
*res
= safe_malloc(sizeof(struct expr
));
166 res
->data
.eint
= integer
;
170 struct expr
*expr_ident(char *ident
, struct list
*fields
)
172 struct expr
*res
= safe_malloc(sizeof(struct expr
));
174 res
->data
.eident
.ident
= ident
;
176 void **els
= list_to_array(fields
, &res
->data
.eident
.nfields
, true);
177 res
->data
.eident
.fields
= (enum fieldspec
*)safe_malloc(
178 res
->data
.eident
.nfields
*sizeof(enum fieldspec
));
179 for (int i
= 0; i
<res
->data
.eident
.nfields
; i
++) {
181 if (strcmp(t
, "fst") == 0)
182 res
->data
.eident
.fields
[i
] = fst
;
183 else if (strcmp(t
, "snd") == 0)
184 res
->data
.eident
.fields
[i
] = snd
;
185 else if (strcmp(t
, "hd") == 0)
186 res
->data
.eident
.fields
[i
] = hd
;
187 else if (strcmp(t
, "tl") == 0)
188 res
->data
.eident
.fields
[i
] = tl
;
195 struct expr
*expr_nil()
197 struct expr
*res
= safe_malloc(sizeof(struct expr
));
202 struct expr
*expr_tuple(struct expr
*left
, struct expr
*right
)
204 struct expr
*res
= safe_malloc(sizeof(struct expr
));
206 res
->data
.etuple
.left
= left
;
207 res
->data
.etuple
.right
= right
;
211 struct expr
*expr_unop(enum unop op
, struct expr
*l
)
213 struct expr
*res
= safe_malloc(sizeof(struct expr
));
215 res
->data
.eunop
.op
= op
;
216 res
->data
.eunop
.l
= l
;
220 const char *cescapes
[] = {
221 [0] = "\\0", [1] = "\\x01", [2] = "\\x02", [3] = "\\x03",
222 [4] = "\\x04", [5] = "\\x05", [6] = "\\x06", [7] = "\\a", [8] = "\\b",
223 [9] = "\\t", [10] = "\\n", [11] = "\\v", [12] = "\\f", [13] = "\\r",
224 [14] = "\\x0E", [15] = "\\x0F", [16] = "\\x10", [17] = "\\x11",
225 [18] = "\\x12", [19] = "\\x13", [20] = "\\x14", [21] = "\\x15",
226 [22] = "\\x16", [23] = "\\x17", [24] = "\\x18", [25] = "\\x19",
227 [26] = "\\x1A", [27] = "\\x1B", [28] = "\\x1C", [29] = "\\x1D",
228 [30] = "\\x1E", [31] = "\\x1F",
232 void ast_print(struct ast
*ast
, FILE *out
)
236 for (int i
= 0; i
<ast
->ndecls
; i
++)
237 decl_print(ast
->decls
[i
], 0, out
);
240 void decl_print(struct decl
*decl
, int indent
, FILE *out
)
246 pindent(indent
, out
);
247 safe_fprintf(out
, "%s (", decl
->data
.dfun
.ident
);
248 for (int i
= 0; i
<decl
->data
.dfun
.nargs
; i
++) {
249 safe_fprintf(out
, "%s", decl
->data
.dfun
.args
[i
]);
250 if (i
< decl
->data
.dfun
.nargs
- 1)
251 safe_fprintf(out
, ", ");
253 safe_fprintf(out
, ") {\n");
254 for (int i
= 0; i
<decl
->data
.dfun
.nbody
; i
++)
255 stmt_print(decl
->data
.dfun
.body
[i
], indent
+1, out
);
256 pindent(indent
, out
);
257 safe_fprintf(out
, "}\n");
260 pindent(indent
, out
);
261 safe_fprintf(out
, "var %s = ", decl
->data
.dvar
.ident
);
262 expr_print(decl
->data
.dvar
.expr
, out
);
263 safe_fprintf(out
, ";\n");
266 die("Unsupported decl node\n");
270 void stmt_print(struct stmt
*stmt
, int indent
, FILE *out
)
276 pindent(indent
, out
);
277 fprintf(out
, "%s", stmt
->data
.sassign
.ident
);
278 safe_fprintf(out
, " = ");
279 expr_print(stmt
->data
.sassign
.expr
, out
);
280 safe_fprintf(out
, ";\n");
283 pindent(indent
, out
);
284 safe_fprintf(out
, "if (");
285 expr_print(stmt
->data
.sif
.pred
, out
);
286 safe_fprintf(out
, ") {\n");
287 for (int i
= 0; i
<stmt
->data
.sif
.nthen
; i
++)
288 stmt_print(stmt
->data
.sif
.then
[i
], indent
+1, out
);
289 pindent(indent
, out
);
290 safe_fprintf(out
, "} else {\n");
291 for (int i
= 0; i
<stmt
->data
.sif
.nels
; i
++)
292 stmt_print(stmt
->data
.sif
.els
[i
], indent
+1, out
);
293 pindent(indent
, out
);
294 safe_fprintf(out
, "}\n");
297 pindent(indent
, out
);
298 safe_fprintf(out
, "return ");
299 expr_print(stmt
->data
.sreturn
, out
);
300 safe_fprintf(out
, ";\n");
303 pindent(indent
, out
);
304 expr_print(stmt
->data
.sexpr
, out
);
305 safe_fprintf(out
, ";\n");
308 pindent(indent
, out
);
309 safe_fprintf(out
, "var %s = ", stmt
->data
.svardecl
.ident
);
310 expr_print(stmt
->data
.svardecl
.expr
, out
);
311 safe_fprintf(out
, ";\n");
314 pindent(indent
, out
);
315 safe_fprintf(out
, "while (");
316 expr_print(stmt
->data
.swhile
.pred
, out
);
317 safe_fprintf(out
, ") {\n");
318 for (int i
= 0; i
<stmt
->data
.swhile
.nbody
; i
++) {
319 stmt_print(stmt
->data
.swhile
.body
[i
], indent
+1, out
);
321 pindent(indent
, out
);
322 safe_fprintf(out
, "}\n");
325 die("Unsupported stmt node\n");
329 void expr_print(struct expr
*expr
, FILE *out
)
335 safe_fprintf(out
, "(");
336 expr_print(expr
->data
.ebinop
.l
, out
);
337 safe_fprintf(out
, "%s", binop_str
[expr
->data
.ebinop
.op
]);
338 expr_print(expr
->data
.ebinop
.r
, out
);
339 safe_fprintf(out
, ")");
342 safe_fprintf(out
, "%s", expr
->data
.ebool
? "true" : "false");
345 if (expr
->data
.echar
< 0)
346 safe_fprintf(out
, "'?'");
347 if (expr
->data
.echar
< ' ' || expr
->data
.echar
== 127)
348 safe_fprintf(out
, "'%s'",
349 cescapes
[(int)expr
->data
.echar
]);
351 safe_fprintf(out
, "'%c'", expr
->data
.echar
);
354 safe_fprintf(out
, "%s(", expr
->data
.efuncall
.ident
);
355 for(int i
= 0; i
<expr
->data
.efuncall
.nargs
; i
++) {
356 expr_print(expr
->data
.efuncall
.args
[i
], out
);
357 if (i
+1 < expr
->data
.efuncall
.nargs
)
358 safe_fprintf(out
, ", ");
360 safe_fprintf(out
, ")");
363 safe_fprintf(out
, "%d", expr
->data
.eint
);
366 fprintf(out
, "%s", expr
->data
.eident
.ident
);
367 for (int i
= 0; i
<expr
->data
.eident
.nfields
; i
++)
369 fieldspec_str
[expr
->data
.eident
.fields
[i
]]);
372 safe_fprintf(out
, "[]");
375 safe_fprintf(out
, "(");
376 expr_print(expr
->data
.etuple
.left
, out
);
377 safe_fprintf(out
, ", ");
378 expr_print(expr
->data
.etuple
.right
, out
);
379 safe_fprintf(out
, ")");
382 safe_fprintf(out
, "(%s", unop_str
[expr
->data
.eunop
.op
]);
383 expr_print(expr
->data
.eunop
.l
, out
);
384 safe_fprintf(out
, ")");
387 die("Unsupported expr node\n");
391 void ast_free(struct ast
*ast
)
395 for (int i
= 0; i
<ast
->ndecls
; i
++)
396 decl_free(ast
->decls
[i
]);
401 void decl_free(struct decl
*decl
)
407 free(decl
->data
.dfun
.ident
);
408 for (int i
= 0; i
<decl
->data
.dfun
.nargs
; i
++)
409 free(decl
->data
.dfun
.args
[i
]);
410 free(decl
->data
.dfun
.args
);
411 for (int i
= 0; i
<decl
->data
.dfun
.nbody
; i
++)
412 stmt_free(decl
->data
.dfun
.body
[i
]);
413 free(decl
->data
.dfun
.body
);
416 free(decl
->data
.dvar
.ident
);
417 expr_free(decl
->data
.dvar
.expr
);
420 die("Unsupported decl node\n");
425 void stmt_free(struct stmt
*stmt
)
431 free(stmt
->data
.sassign
.ident
);
432 expr_free(stmt
->data
.sassign
.expr
);
435 expr_free(stmt
->data
.sif
.pred
);
436 for (int i
= 0; i
<stmt
->data
.sif
.nthen
; i
++)
437 stmt_free(stmt
->data
.sif
.then
[i
]);
438 free(stmt
->data
.sif
.then
);
439 for (int i
= 0; i
<stmt
->data
.sif
.nels
; i
++)
440 stmt_free(stmt
->data
.sif
.els
[i
]);
441 free(stmt
->data
.sif
.els
);
444 expr_free(stmt
->data
.sreturn
);
447 expr_free(stmt
->data
.sexpr
);
450 free(stmt
->data
.svardecl
.ident
);
451 expr_free(stmt
->data
.svardecl
.expr
);
454 expr_free(stmt
->data
.swhile
.pred
);
455 for (int i
= 0; i
<stmt
->data
.swhile
.nbody
; i
++)
456 stmt_free(stmt
->data
.swhile
.body
[i
]);
457 free(stmt
->data
.swhile
.body
);
460 die("Unsupported stmt node\n");
465 void expr_free(struct expr
*expr
)
469 expr_free(expr
->data
.ebinop
.l
);
470 expr_free(expr
->data
.ebinop
.r
);
477 free(expr
->data
.efuncall
.ident
);
478 for (int i
= 0; i
<expr
->data
.efuncall
.nargs
; i
++)
479 expr_free(expr
->data
.efuncall
.args
[i
]);
480 free(expr
->data
.efuncall
.args
);
485 free(expr
->data
.eident
.ident
);
486 free(expr
->data
.eident
.fields
);
491 expr_free(expr
->data
.etuple
.left
);
492 expr_free(expr
->data
.etuple
.right
);
495 expr_free(expr
->data
.eunop
.l
);
498 die("Unsupported expr node\n");