13 #include "oberon-internals.h"
14 #include "oberon-type-compat.h"
15 #include "oberon-common.h"
16 #include "generator.h"
18 // =======================================================================
20 // =======================================================================
23 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
);
25 static oberon_type_t
*
26 oberon_new_type_ptr(int class)
28 oberon_type_t
* x
= GC_MALLOC(sizeof *x
);
29 memset(x
, 0, sizeof *x
);
34 static oberon_type_t
*
35 oberon_new_type_integer(int size
)
38 x
= oberon_new_type_ptr(OBERON_TYPE_INTEGER
);
43 static oberon_type_t
*
44 oberon_new_type_boolean()
47 x
= oberon_new_type_ptr(OBERON_TYPE_BOOLEAN
);
51 static oberon_type_t
*
52 oberon_new_type_real(int size
)
55 x
= oberon_new_type_ptr(OBERON_TYPE_REAL
);
60 static oberon_type_t
*
61 oberon_new_type_char(int size
)
64 x
= oberon_new_type_ptr(OBERON_TYPE_CHAR
);
69 static oberon_type_t
*
70 oberon_new_type_string(int size
)
73 x
= oberon_new_type_ptr(OBERON_TYPE_STRING
);
78 static oberon_type_t
*
79 oberon_new_type_set(int size
)
82 x
= oberon_new_type_ptr(OBERON_TYPE_SET
);
87 static oberon_expr_t
*
88 oberon_new_operator(int op
, oberon_type_t
* result
, oberon_expr_t
* left
, oberon_expr_t
* right
)
90 oberon_oper_t
* operator;
91 operator = GC_MALLOC(sizeof *operator);
92 memset(operator, 0, sizeof *operator);
94 operator -> is_item
= 0;
95 operator -> result
= result
;
96 operator -> read_only
= 1;
98 operator -> left
= left
;
99 operator -> right
= right
;
101 return (oberon_expr_t
*) operator;
104 static oberon_expr_t
*
105 oberon_new_item(int mode
, oberon_type_t
* result
, int read_only
)
107 oberon_item_t
* item
;
108 item
= GC_MALLOC(sizeof *item
);
109 memset(item
, 0, sizeof *item
);
112 item
-> result
= result
;
113 item
-> read_only
= read_only
;
116 return (oberon_expr_t
*)item
;
119 static oberon_type_t
*
120 oberon_get_type_of_int_value(oberon_context_t
* ctx
, int64_t i
)
122 if(i
>= -128 && i
<= 127)
124 return ctx
-> byte_type
;
126 else if(i
>= -32768 && i
<= 32767)
128 return ctx
-> shortint_type
;
130 else if(i
>= -2147483648 && i
<= 2147483647)
132 return ctx
-> int_type
;
136 return ctx
-> longint_type
;
140 static oberon_expr_t
*
141 oberon_make_integer(oberon_context_t
* ctx
, int64_t i
)
143 oberon_expr_t
* expr
;
144 oberon_type_t
* result
;
145 result
= oberon_get_type_of_int_value(ctx
, i
);
146 expr
= oberon_new_item(MODE_INTEGER
, result
, true);
147 expr
-> item
.integer
= i
;
148 expr
-> item
.real
= i
;
152 static oberon_expr_t
*
153 oberon_make_system_byte(oberon_context_t
* ctx
, int64_t i
)
155 oberon_expr_t
* expr
;
156 expr
= oberon_new_item(MODE_SYSBYTE
, ctx
-> system_byte_type
, true);
157 expr
-> item
.integer
= i
;
158 expr
-> item
.real
= i
;
162 static oberon_expr_t
*
163 oberon_make_char(oberon_context_t
* ctx
, int64_t i
)
165 oberon_expr_t
* expr
;
166 expr
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
167 expr
-> item
.integer
= i
;
168 expr
-> item
.real
= i
;
172 static oberon_expr_t
*
173 oberon_make_string(oberon_context_t
* ctx
, char * str
)
175 oberon_expr_t
* expr
;
176 expr
= oberon_new_item(MODE_STRING
, ctx
-> string_type
, true);
177 expr
-> item
.integer
= str
[0];
178 expr
-> item
.real
= str
[0];
179 expr
-> item
.string
= str
;
183 static oberon_expr_t
*
184 oberon_make_real_typed(oberon_context_t
* ctx
, double r
, oberon_type_t
* result
)
186 oberon_expr_t
* expr
;
187 expr
= oberon_new_item(MODE_REAL
, result
, true);
188 expr
-> item
.integer
= r
;
189 expr
-> item
.real
= r
;
193 static oberon_expr_t
*
194 oberon_make_real(oberon_context_t
* ctx
, double r
, bool longmode
)
196 oberon_type_t
* result
;
197 result
= (longmode
) ? (ctx
-> longreal_type
) : (ctx
-> real_type
);
198 return oberon_make_real_typed(ctx
, r
, result
);
201 static oberon_expr_t
*
202 oberon_make_boolean(oberon_context_t
* ctx
, bool cond
)
204 oberon_expr_t
* expr
;
205 expr
= oberon_new_item(MODE_BOOLEAN
, ctx
-> bool_type
, true);
206 expr
-> item
.integer
= cond
;
207 expr
-> item
.real
= cond
;
211 static oberon_expr_t
*
212 oberon_make_set(oberon_context_t
* ctx
, int64_t i
)
214 oberon_expr_t
* expr
;
215 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
216 expr
-> item
.integer
= i
;
217 expr
-> item
.real
= i
;
221 static oberon_expr_t
*
222 oberon_make_set_index(oberon_context_t
* ctx
, int64_t i
)
224 oberon_expr_t
* expr
;
225 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
226 expr
-> item
.integer
= 1 << i
;
227 expr
-> item
.real
= 1 << i
;
231 static oberon_expr_t
*
232 oberon_make_set_range(oberon_context_t
* ctx
, int64_t x
, int64_t y
)
234 oberon_expr_t
* expr
;
235 expr
= oberon_new_item(MODE_SET
, ctx
-> set_type
, true);
236 expr
-> item
.integer
= (x
<= y
) ? ((2 << y
) - (1 << x
)) : (0);
237 expr
-> item
.real
= expr
-> item
.integer
;
241 // =======================================================================
243 // =======================================================================
245 static oberon_scope_t
*
246 oberon_open_scope(oberon_context_t
* ctx
)
248 oberon_scope_t
* scope
= GC_MALLOC(sizeof *scope
);
249 memset(scope
, 0, sizeof *scope
);
251 oberon_object_t
* list
= GC_MALLOC(sizeof *list
);
252 memset(list
, 0, sizeof *list
);
255 scope
-> list
= list
;
256 scope
-> up
= ctx
-> decl
;
260 scope
-> local
= scope
-> up
-> local
;
261 scope
-> parent
= scope
-> up
-> parent
;
262 scope
-> parent_type
= scope
-> up
-> parent_type
;
263 scope
-> exit_label
= scope
-> up
-> exit_label
;
271 oberon_close_scope(oberon_scope_t
* scope
)
273 oberon_context_t
* ctx
= scope
-> ctx
;
274 ctx
-> decl
= scope
-> up
;
277 static oberon_object_t
*
278 oberon_find_object_in_list(oberon_object_t
* list
, char * name
)
280 oberon_object_t
* x
= list
;
281 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
288 static oberon_object_t
*
289 oberon_find_object(oberon_scope_t
* scope
, char * name
, bool check_it
)
291 oberon_object_t
* result
= NULL
;
293 oberon_scope_t
* s
= scope
;
294 while(result
== NULL
&& s
!= NULL
)
296 result
= oberon_find_object_in_list(s
-> list
, name
);
300 if(check_it
&& result
== NULL
)
302 oberon_error(scope
-> ctx
, "undefined ident %s", name
);
308 static oberon_object_t
*
309 oberon_create_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
)
311 oberon_object_t
* newvar
= GC_MALLOC(sizeof *newvar
);
312 memset(newvar
, 0, sizeof *newvar
);
313 newvar
-> name
= name
;
314 newvar
-> class = class;
315 newvar
-> export
= export
;
316 newvar
-> read_only
= read_only
;
317 newvar
-> local
= scope
-> local
;
318 newvar
-> parent
= scope
-> parent
;
319 newvar
-> parent_type
= scope
-> parent_type
;
320 newvar
-> module
= scope
-> ctx
-> mod
;
324 static oberon_object_t
*
325 oberon_define_object(oberon_scope_t
* scope
, char * name
, int class, bool export
, bool read_only
, bool check_upscope
)
329 if(oberon_find_object(scope
-> up
, name
, false))
331 oberon_error(scope
-> ctx
, "already defined");
335 oberon_object_t
* x
= scope
-> list
;
336 while(x
-> next
&& strcmp(x
-> next
-> name
, name
) != 0)
343 oberon_error(scope
-> ctx
, "already defined");
346 oberon_object_t
* newvar
;
347 newvar
= oberon_create_object(scope
, name
, class, export
, read_only
);
353 // =======================================================================
355 // =======================================================================
358 oberon_get_char(oberon_context_t
* ctx
)
360 if(ctx
-> code
[ctx
-> code_index
])
362 ctx
-> code_index
+= 1;
363 ctx
-> xloc
.col
+= 1;
364 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
369 oberon_init_scaner(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
371 ctx
-> code
= s
-> code
;
372 ctx
-> code_index
= 0;
373 ctx
-> xloc
.source
= s
-> source
;
374 ctx
-> xloc
.line
= 1;
376 ctx
-> loc
= ctx
-> xloc
;
377 ctx
-> c
= ctx
-> code
[ctx
-> code_index
];
381 oberon_read_ident(oberon_context_t
* ctx
)
383 int start
= ctx
-> code_index
;
385 oberon_get_char(ctx
);
386 while(isalnum(ctx
-> c
) || ctx
-> c
== '_')
388 oberon_get_char(ctx
);
391 int end
= ctx
-> code_index
;
393 char * ident
= GC_MALLOC(end
- start
+ 1);
394 memcpy(ident
, &ctx
-> code
[start
], end
- start
);
395 ident
[end
- start
] = 0;
397 ctx
-> string
= ident
;
398 ctx
-> token
= IDENT
;
400 if(strcmp(ident
, "MODULE") == 0)
402 ctx
-> token
= MODULE
;
404 else if(strcmp(ident
, "END") == 0)
408 else if(strcmp(ident
, "VAR") == 0)
412 else if(strcmp(ident
, "BEGIN") == 0)
414 ctx
-> token
= BEGIN
;
416 else if(strcmp(ident
, "OR") == 0)
420 else if(strcmp(ident
, "DIV") == 0)
424 else if(strcmp(ident
, "MOD") == 0)
428 else if(strcmp(ident
, "PROCEDURE") == 0)
430 ctx
-> token
= PROCEDURE
;
432 else if(strcmp(ident
, "RETURN") == 0)
434 ctx
-> token
= RETURN
;
436 else if(strcmp(ident
, "CONST") == 0)
438 ctx
-> token
= CONST
;
440 else if(strcmp(ident
, "TYPE") == 0)
444 else if(strcmp(ident
, "ARRAY") == 0)
446 ctx
-> token
= ARRAY
;
448 else if(strcmp(ident
, "OF") == 0)
452 else if(strcmp(ident
, "RECORD") == 0)
454 ctx
-> token
= RECORD
;
456 else if(strcmp(ident
, "POINTER") == 0)
458 ctx
-> token
= POINTER
;
460 else if(strcmp(ident
, "TO") == 0)
464 else if(strcmp(ident
, "NIL") == 0)
468 else if(strcmp(ident
, "IMPORT") == 0)
470 ctx
-> token
= IMPORT
;
472 else if(strcmp(ident
, "IN") == 0)
476 else if(strcmp(ident
, "IS") == 0)
480 else if(strcmp(ident
, "IF") == 0)
484 else if(strcmp(ident
, "THEN") == 0)
488 else if(strcmp(ident
, "ELSE") == 0)
492 else if(strcmp(ident
, "ELSIF") == 0)
494 ctx
-> token
= ELSIF
;
496 else if(strcmp(ident
, "WHILE") == 0)
498 ctx
-> token
= WHILE
;
500 else if(strcmp(ident
, "DO") == 0)
504 else if(strcmp(ident
, "REPEAT") == 0)
506 ctx
-> token
= REPEAT
;
508 else if(strcmp(ident
, "UNTIL") == 0)
510 ctx
-> token
= UNTIL
;
512 else if(strcmp(ident
, "FOR") == 0)
516 else if(strcmp(ident
, "BY") == 0)
520 else if(strcmp(ident
, "LOOP") == 0)
524 else if(strcmp(ident
, "EXIT") == 0)
528 else if(strcmp(ident
, "CASE") == 0)
532 else if(strcmp(ident
, "WITH") == 0)
538 #define ISHEXDIGIT(x) \
539 (((x) >= '0' && (x) <= '9') || ((x) >= 'A' && (x) <= 'F'))
542 oberon_read_number(oberon_context_t
* ctx
)
555 * mode = 3 == LONGREAL
559 start_i
= ctx
-> code_index
;
561 while(isdigit(ctx
-> c
))
563 oberon_get_char(ctx
);
566 end_i
= ctx
-> code_index
;
568 if(ISHEXDIGIT(ctx
-> c
))
571 while(ISHEXDIGIT(ctx
-> c
))
573 oberon_get_char(ctx
);
576 end_i
= ctx
-> code_index
;
581 oberon_get_char(ctx
);
583 else if(ctx
-> c
== 'X')
586 oberon_get_char(ctx
);
590 oberon_error(ctx
, "invalid hex number");
593 else if(ctx
-> c
== '.')
595 oberon_get_char(ctx
);
598 /* Чит: избегаем конфликта с DOTDOT */
599 ctx
-> code_index
-= 1;
605 while(isdigit(ctx
-> c
))
607 oberon_get_char(ctx
);
610 if(ctx
-> c
== 'E' || ctx
-> c
== 'D')
612 exp_i
= ctx
-> code_index
;
619 oberon_get_char(ctx
);
621 if(ctx
-> c
== '+' || ctx
-> c
== '-')
623 oberon_get_char(ctx
);
626 while(isdigit(ctx
-> c
))
628 oberon_get_char(ctx
);
632 end_i
= ctx
-> code_index
;
640 oberon_get_char(ctx
);
642 else if(ctx
-> c
== 'X')
645 oberon_get_char(ctx
);
649 int len
= end_i
- start_i
;
650 ident
= GC_MALLOC(len
+ 1);
651 memcpy(ident
, &ctx
-> code
[start_i
], len
);
654 ctx
-> longmode
= false;
657 int i
= exp_i
- start_i
;
659 ctx
-> longmode
= true;
665 integer
= atol(ident
);
667 ctx
-> token
= INTEGER
;
670 sscanf(ident
, "%lx", &integer
);
672 ctx
-> token
= INTEGER
;
676 sscanf(ident
, "%lf", &real
);
681 sscanf(ident
, "%lx", &integer
);
686 oberon_error(ctx
, "oberon_read_number: wat");
690 ctx
-> string
= ident
;
691 ctx
-> integer
= integer
;
696 oberon_get_lined_char(oberon_context_t
* ctx
)
702 oberon_get_char(ctx
);
705 oberon_get_char(ctx
);
707 ctx
-> xloc
.line
+= 1;
710 else if(ctx
-> c
== 0xA)
712 oberon_get_char(ctx
);
713 ctx
-> xloc
.line
+= 1;
718 oberon_get_char(ctx
);
720 } while(ctx
-> c
== 0xD || ctx
-> c
== 0xA);
724 oberon_skip_space(oberon_context_t
* ctx
)
726 while(isspace(ctx
-> c
))
728 oberon_get_lined_char(ctx
);
733 oberon_read_comment(oberon_context_t
* ctx
)
740 oberon_get_lined_char(ctx
);
743 oberon_get_lined_char(ctx
);
747 else if(ctx
-> c
== '*')
749 oberon_get_lined_char(ctx
);
752 oberon_get_lined_char(ctx
);
756 else if(ctx
-> c
== 0)
758 oberon_error(ctx
, "unterminated comment");
762 oberon_get_lined_char(ctx
);
767 static void oberon_read_string(oberon_context_t
* ctx
)
770 oberon_get_char(ctx
);
772 int start
= ctx
-> code_index
;
774 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
776 oberon_get_char(ctx
);
781 oberon_error(ctx
, "unterminated string");
784 int end
= ctx
-> code_index
;
786 oberon_get_char(ctx
);
788 char * string
= GC_MALLOC(end
- start
+ 1);
789 strncpy(string
, &ctx
-> code
[start
], end
- start
);
790 string
[end
- start
] = 0;
792 ctx
-> token
= STRING
;
793 ctx
-> string
= string
;
794 ctx
-> integer
= string
[0];
797 static void oberon_read_token(oberon_context_t
* ctx
);
800 oberon_read_symbol(oberon_context_t
* ctx
)
809 ctx
-> token
= SEMICOLON
;
810 oberon_get_char(ctx
);
813 ctx
-> token
= COLON
;
814 oberon_get_char(ctx
);
817 ctx
-> token
= ASSIGN
;
818 oberon_get_char(ctx
);
823 oberon_get_char(ctx
);
826 ctx
-> token
= DOTDOT
;
827 oberon_get_char(ctx
);
831 ctx
-> token
= LPAREN
;
832 oberon_get_char(ctx
);
835 oberon_get_char(ctx
);
836 oberon_read_comment(ctx
);
837 oberon_read_token(ctx
);
841 ctx
-> token
= RPAREN
;
842 oberon_get_char(ctx
);
845 ctx
-> token
= EQUAL
;
846 oberon_get_char(ctx
);
850 oberon_get_char(ctx
);
854 oberon_get_char(ctx
);
858 oberon_get_char(ctx
);
862 ctx
-> token
= GREAT
;
863 oberon_get_char(ctx
);
867 oberon_get_char(ctx
);
872 oberon_get_char(ctx
);
875 ctx
-> token
= MINUS
;
876 oberon_get_char(ctx
);
880 oberon_get_char(ctx
);
883 oberon_get_char(ctx
);
884 oberon_error(ctx
, "unstarted comment");
888 ctx
-> token
= SLASH
;
889 oberon_get_char(ctx
);
893 oberon_get_char(ctx
);
897 oberon_get_char(ctx
);
900 ctx
-> token
= COMMA
;
901 oberon_get_char(ctx
);
904 ctx
-> token
= LBRACK
;
905 oberon_get_char(ctx
);
908 ctx
-> token
= RBRACK
;
909 oberon_get_char(ctx
);
912 ctx
-> token
= UPARROW
;
913 oberon_get_char(ctx
);
916 oberon_read_string(ctx
);
919 oberon_read_string(ctx
);
922 ctx
-> token
= LBRACE
;
923 oberon_get_char(ctx
);
926 ctx
-> token
= RBRACE
;
927 oberon_get_char(ctx
);
931 oberon_get_char(ctx
);
934 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
940 oberon_read_token(oberon_context_t
* ctx
)
942 oberon_skip_space(ctx
);
944 ctx
-> loc
= ctx
-> xloc
;
947 if(isalpha(c
) || c
== '_')
949 oberon_read_ident(ctx
);
953 oberon_read_number(ctx
);
957 oberon_read_symbol(ctx
);
961 // =======================================================================
963 // =======================================================================
965 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
966 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
967 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
968 static char * oberon_assert_ident(oberon_context_t
* ctx
);
969 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
970 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
971 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
972 static bool oberon_is_const(oberon_expr_t
* expr
);
974 static oberon_expr_t
*
975 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
977 oberon_expr_t
* expr
;
978 oberon_type_t
* result
;
980 result
= a
-> result
;
984 if(result
-> class == OBERON_TYPE_SET
)
986 if(oberon_is_const(a
))
988 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
992 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
995 else if(result
-> class == OBERON_TYPE_INTEGER
)
997 if(oberon_is_const(a
))
999 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
1003 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1006 else if(result
-> class == OBERON_TYPE_REAL
)
1008 if(oberon_is_const(a
))
1010 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
1014 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1019 oberon_error(ctx
, "incompatible operator type");
1022 else if(token
== NOT
)
1024 if(result
-> class != OBERON_TYPE_BOOLEAN
)
1026 oberon_error(ctx
, "incompatible operator type");
1029 if(oberon_is_const(a
))
1031 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1035 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1040 oberon_error(ctx
, "oberon_make_unary_op: wat");
1047 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1049 oberon_expr_t
* last
;
1054 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1058 *first
= last
= oberon_expr(ctx
);
1060 while(ctx
-> token
== COMMA
)
1062 oberon_assert_token(ctx
, COMMA
);
1063 oberon_expr_t
* current
;
1067 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1071 current
= oberon_expr(ctx
);
1074 last
-> next
= current
;
1080 static oberon_expr_t
*
1081 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1083 oberon_expr_t
* cast
;
1085 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1087 /* Автоматически преобразуем строку единичного размера в символ */
1088 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1089 cast
-> item
.integer
= expr
-> item
.string
[0];
1091 else if(!oberon_is_some_types(expr
-> result
, pref
))
1093 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1103 static oberon_expr_t
*
1104 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1106 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1110 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1112 if(dst
-> read_only
)
1114 oberon_error(ctx
, "read-only destination");
1117 if(dst
-> is_item
== false)
1119 oberon_error(ctx
, "not variable");
1122 switch(dst
-> item
.mode
)
1133 oberon_error(ctx
, "not variable");
1139 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1143 if(src
-> item
.mode
== MODE_TYPE
)
1145 oberon_error(ctx
, "not variable");
1151 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1153 if(desig
-> mode
!= MODE_CALL
)
1155 oberon_error(ctx
, "expected mode CALL");
1158 oberon_type_t
* fn
= desig
-> parent
-> result
;
1159 int num_args
= desig
-> num_args
;
1160 int num_decl
= fn
-> num_decl
;
1162 if(num_args
< num_decl
)
1164 oberon_error(ctx
, "too few arguments");
1166 else if(num_args
> num_decl
)
1168 oberon_error(ctx
, "too many arguments");
1171 /* Делаем проверку на запись и делаем автокаст */
1172 oberon_expr_t
* casted
[num_args
];
1173 oberon_expr_t
* arg
= desig
-> args
;
1174 oberon_object_t
* param
= fn
-> decl
;
1175 for(int i
= 0; i
< num_args
; i
++)
1177 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1179 oberon_check_dst(ctx
, arg
);
1180 if(!oberon_is_compatible_arrays(param
, arg
))
1182 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1185 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1189 oberon_check_src(ctx
, arg
);
1190 if(!oberon_is_compatible_arrays(param
, arg
))
1192 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1194 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1198 param
= param
-> next
;
1201 /* Создаём новый список выражений */
1205 for(int i
= 0; i
< num_args
- 1; i
++)
1207 casted
[i
] -> next
= casted
[i
+ 1];
1209 desig
-> args
= arg
;
1213 static oberon_expr_t
*
1214 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1216 oberon_type_t
* signature
= item
-> result
;
1217 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1219 oberon_error(ctx
, "not a procedure");
1222 oberon_expr_t
* call
;
1224 if(signature
-> sysproc
)
1226 if(signature
-> genfunc
== NULL
)
1228 oberon_error(ctx
, "not a function-procedure");
1231 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1235 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1237 oberon_error(ctx
, "attempt to call procedure in expression");
1240 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1241 call
-> item
.parent
= item
;
1242 call
-> item
.num_args
= num_args
;
1243 call
-> item
.args
= list_args
;
1244 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1251 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1253 oberon_type_t
* signature
= item
-> result
;
1254 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1256 oberon_error(ctx
, "not a procedure");
1259 oberon_expr_t
* call
;
1261 if(signature
-> sysproc
)
1263 if(signature
-> genproc
== NULL
)
1265 oberon_error(ctx
, "not a procedure");
1268 signature
-> genproc(ctx
, num_args
, list_args
);
1272 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1274 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1277 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1278 call
-> item
.parent
= item
;
1279 call
-> item
.num_args
= num_args
;
1280 call
-> item
.args
= list_args
;
1281 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1282 oberon_generate_call_proc(ctx
, call
);
1290 || ((x) == INTEGER) \
1293 || ((x) == STRING) \
1295 || ((x) == LBRACE) \
1296 || ((x) == LPAREN) \
1299 static oberon_expr_t
*
1300 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1302 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1304 oberon_error(ctx
, "not a pointer");
1307 assert(expr
-> is_item
);
1309 oberon_expr_t
* selector
;
1310 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1311 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1316 static oberon_expr_t
*
1317 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1319 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1321 desig
= oberno_make_dereferencing(ctx
, desig
);
1324 assert(desig
-> is_item
);
1326 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1328 oberon_error(ctx
, "not array");
1331 oberon_type_t
* base
;
1332 base
= desig
-> result
-> base
;
1334 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1336 oberon_error(ctx
, "index must be integer");
1339 // Статическая проверка границ массива
1340 if(desig
-> result
-> size
!= 0)
1342 if(index
-> is_item
)
1344 if(index
-> item
.mode
== MODE_INTEGER
)
1346 int arr_size
= desig
-> result
-> size
;
1347 int index_int
= index
-> item
.integer
;
1348 if(index_int
< 0 || index_int
> arr_size
- 1)
1350 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1356 oberon_expr_t
* selector
;
1357 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1358 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1359 selector
-> item
.num_args
= 1;
1360 selector
-> item
.args
= index
;
1365 static oberon_expr_t
*
1366 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1368 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1370 expr
= oberno_make_dereferencing(ctx
, expr
);
1373 assert(expr
-> is_item
);
1375 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1377 oberon_error(ctx
, "not record");
1380 oberon_type_t
* rec
= expr
-> result
;
1382 oberon_object_t
* field
;
1383 field
= oberon_find_object(rec
-> scope
, name
, true);
1385 if(field
-> export
== 0)
1387 if(field
-> module
!= ctx
-> mod
)
1389 oberon_error(ctx
, "field not exported");
1393 int read_only
= expr
-> read_only
;
1394 if(field
-> read_only
)
1396 if(field
-> module
!= ctx
-> mod
)
1402 oberon_expr_t
* selector
;
1403 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1404 selector
-> item
.var
= field
;
1405 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1410 #define ISSELECTOR(x) \
1413 || ((x) == UPARROW) \
1416 static oberon_object_t
*
1417 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1420 oberon_object_t
* x
;
1422 name
= oberon_assert_ident(ctx
);
1423 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1427 if(x
-> class == OBERON_CLASS_MODULE
)
1429 oberon_assert_token(ctx
, DOT
);
1430 name
= oberon_assert_ident(ctx
);
1431 /* Наличие объектов в левых модулях всегда проверяется */
1432 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1434 if(x
-> export
== 0)
1436 oberon_error(ctx
, "not exported");
1449 static oberon_expr_t
*
1450 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1453 oberon_object_t
* x
;
1454 oberon_expr_t
* expr
;
1456 x
= oberon_find_object(ctx
-> decl
, name
, true);
1459 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1464 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1465 expr
-> item
.var
= x
;
1469 static oberon_expr_t
*
1470 oberon_qualident_expr(oberon_context_t
* ctx
)
1472 oberon_object_t
* var
;
1473 oberon_expr_t
* expr
;
1475 var
= oberon_qualident(ctx
, NULL
, 1);
1478 if(var
-> read_only
)
1480 if(var
-> module
!= ctx
-> mod
)
1486 switch(var
-> class)
1488 case OBERON_CLASS_CONST
:
1490 expr
= (oberon_expr_t
*) var
-> value
;
1492 case OBERON_CLASS_TYPE
:
1493 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1495 case OBERON_CLASS_VAR
:
1496 case OBERON_CLASS_VAR_PARAM
:
1497 case OBERON_CLASS_PARAM
:
1498 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1500 case OBERON_CLASS_PROC
:
1501 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1504 oberon_error(ctx
, "invalid designator");
1508 expr
-> item
.var
= var
;
1513 static oberon_expr_t
*
1514 oberon_designator(oberon_context_t
* ctx
)
1517 oberon_expr_t
* expr
;
1518 oberon_object_t
* objtype
;
1520 expr
= oberon_qualident_expr(ctx
);
1522 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1524 switch(ctx
-> token
)
1527 oberon_assert_token(ctx
, DOT
);
1528 name
= oberon_assert_ident(ctx
);
1529 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1532 oberon_assert_token(ctx
, LBRACK
);
1533 int num_indexes
= 0;
1534 oberon_expr_t
* indexes
= NULL
;
1535 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1536 oberon_assert_token(ctx
, RBRACK
);
1538 for(int i
= 0; i
< num_indexes
; i
++)
1540 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1541 indexes
= indexes
-> next
;
1545 oberon_assert_token(ctx
, UPARROW
);
1546 expr
= oberno_make_dereferencing(ctx
, expr
);
1549 oberon_assert_token(ctx
, LPAREN
);
1550 objtype
= oberon_qualident(ctx
, NULL
, true);
1551 oberon_assert_token(ctx
, RPAREN
);
1552 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1553 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1556 oberon_error(ctx
, "oberon_designator: wat");
1564 static oberon_expr_t
*
1565 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1567 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1568 if(ctx
-> token
== LPAREN
)
1570 oberon_assert_token(ctx
, LPAREN
);
1573 oberon_expr_t
* arguments
= NULL
;
1575 if(ISEXPR(ctx
-> token
))
1577 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1580 assert(expr
-> is_item
== 1);
1581 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1583 oberon_assert_token(ctx
, RPAREN
);
1590 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1592 assert(expr
-> is_item
);
1595 oberon_expr_t
* arguments
= NULL
;
1597 if(ctx
-> token
== LPAREN
)
1599 oberon_assert_token(ctx
, LPAREN
);
1601 if(ISEXPR(ctx
-> token
))
1603 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1606 oberon_assert_token(ctx
, RPAREN
);
1609 /* Вызов происходит даже без скобок */
1610 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1613 static oberon_expr_t
*
1614 oberon_element(oberon_context_t
* ctx
)
1619 e1
= oberon_expr(ctx
);
1620 oberon_check_src(ctx
, e1
);
1621 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1623 oberon_error(ctx
, "expected integer");
1627 if(ctx
-> token
== DOTDOT
)
1629 oberon_assert_token(ctx
, DOTDOT
);
1630 e2
= oberon_expr(ctx
);
1631 oberon_check_src(ctx
, e2
);
1632 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1634 oberon_error(ctx
, "expected integer");
1638 oberon_expr_t
* set
;
1639 if(e2
== NULL
&& oberon_is_const(e1
))
1641 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1643 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1645 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1649 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1654 static oberon_expr_t
*
1655 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1657 if(oberon_is_const(a
) && oberon_is_const(b
))
1659 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1663 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1667 static oberon_expr_t
*
1668 oberon_set(oberon_context_t
* ctx
)
1670 oberon_expr_t
* set
;
1671 oberon_expr_t
* elements
;
1672 set
= oberon_make_set(ctx
, 0);
1674 oberon_assert_token(ctx
, LBRACE
);
1675 if(ISEXPR(ctx
-> token
))
1677 elements
= oberon_element(ctx
);
1678 set
= oberon_make_set_union(ctx
, set
, elements
);
1679 while(ctx
-> token
== COMMA
)
1681 oberon_assert_token(ctx
, COMMA
);
1682 elements
= oberon_element(ctx
);
1683 set
= oberon_make_set_union(ctx
, set
, elements
);
1686 oberon_assert_token(ctx
, RBRACE
);
1691 static oberon_expr_t
*
1692 oberon_factor(oberon_context_t
* ctx
)
1694 oberon_expr_t
* expr
;
1695 oberon_type_t
* result
;
1697 switch(ctx
-> token
)
1700 expr
= oberon_designator(ctx
);
1701 expr
= oberon_opt_func_parens(ctx
, expr
);
1704 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1705 oberon_assert_token(ctx
, INTEGER
);
1708 result
= ctx
-> char_type
;
1709 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1710 expr
-> item
.integer
= ctx
-> integer
;
1711 oberon_assert_token(ctx
, CHAR
);
1714 expr
= oberon_make_string(ctx
, ctx
-> string
);
1715 oberon_assert_token(ctx
, STRING
);
1718 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1719 oberon_assert_token(ctx
, REAL
);
1722 expr
= oberon_set(ctx
);
1725 oberon_assert_token(ctx
, LPAREN
);
1726 expr
= oberon_expr(ctx
);
1727 oberon_assert_token(ctx
, RPAREN
);
1730 oberon_assert_token(ctx
, NOT
);
1731 expr
= oberon_factor(ctx
);
1732 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1735 oberon_assert_token(ctx
, NIL
);
1736 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1739 oberon_error(ctx
, "invalid expression");
1745 static oberon_expr_t
*
1746 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1748 oberon_expr_t
* expr
;
1749 oberon_type_t
* result
;
1751 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1752 oberon_check_src(ctx
, a
);
1755 oberon_check_src(ctx
, b
);
1760 if(oberon_is_const(a
) && oberon_is_const(b
))
1762 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1766 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1769 else if(token
== IS
)
1771 oberon_check_type_expr(ctx
, b
);
1772 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1774 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1776 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1778 result
= b
-> result
;
1780 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1782 result
= a
-> result
;
1784 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1786 result
= ctx
-> char_type
;
1790 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1793 if(oberon_is_const(a
) && oberon_is_const(b
)
1794 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1796 if(oberon_is_real_type(result
))
1798 double x
= a
-> item
.real
;
1799 double y
= b
-> item
.real
;
1802 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1803 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1804 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1805 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1806 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1807 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1808 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1809 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1810 default: assert(0); break;
1813 else if(oberon_is_integer_type(result
))
1815 int64_t x
= a
-> item
.integer
;
1816 int64_t y
= b
-> item
.integer
;
1819 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1820 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1821 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1822 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1823 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1824 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1825 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1826 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1827 default: assert(0); break;
1837 a
= oberon_cast_expr(ctx
, a
, result
);
1838 b
= oberon_cast_expr(ctx
, b
, result
);
1839 result
= ctx
-> bool_type
;
1842 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1843 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1844 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1845 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1846 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1847 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1848 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1849 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1850 default: assert(0); break;
1854 else if(token
== SLASH
)
1856 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1858 if(oberon_is_const(a
) && oberon_is_const(b
))
1860 int64_t x
= a
-> item
.integer
;
1861 int64_t y
= b
-> item
.integer
;
1862 expr
= oberon_make_set(ctx
, x
^ y
);
1866 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1867 a
= oberon_cast_expr(ctx
, a
, result
);
1868 b
= oberon_cast_expr(ctx
, b
, result
);
1869 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1874 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1875 if(oberon_is_const(a
) && oberon_is_const(b
))
1877 double x
= a
-> item
.real
;
1878 double y
= b
-> item
.real
;
1879 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1883 a
= oberon_cast_expr(ctx
, a
, result
);
1884 b
= oberon_cast_expr(ctx
, b
, result
);
1885 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1891 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1893 if(oberon_is_const(a
) && oberon_is_const(b
))
1895 if(oberon_is_set_type(result
))
1897 int64_t x
= a
-> item
.integer
;
1898 int64_t y
= b
-> item
.integer
;
1901 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1902 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1903 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1904 default: assert(0); break;
1907 if(oberon_is_real_type(result
))
1909 double x
= a
-> item
.real
;
1910 double y
= b
-> item
.real
;
1913 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1914 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1915 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1916 default: assert(0); break;
1919 else if(oberon_is_integer_type(result
))
1921 int64_t x
= a
-> item
.integer
;
1922 int64_t y
= b
-> item
.integer
;
1925 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1926 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1927 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1928 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1929 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1930 default: assert(0); break;
1940 a
= oberon_cast_expr(ctx
, a
, result
);
1941 b
= oberon_cast_expr(ctx
, b
, result
);
1944 if(oberon_is_set_type(result
))
1949 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1952 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1955 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1962 else if(oberon_is_real_type(result
))
1967 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1970 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1973 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1976 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
1981 else if(oberon_is_integer_type(result
))
1986 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1989 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1992 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1995 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1998 expr
= oberon_new_operator(OP_MOD
, result
, a
, b
);
2001 printf("token %i line %i\n", token
, ctx
-> loc
.line
);
2016 #define ISMULOP(x) \
2017 ((x) >= STAR && (x) <= AND)
2019 static oberon_expr_t
*
2020 oberon_term_expr(oberon_context_t
* ctx
)
2022 oberon_expr_t
* expr
;
2024 expr
= oberon_factor(ctx
);
2025 while(ISMULOP(ctx
-> token
))
2027 int token
= ctx
-> token
;
2028 oberon_read_token(ctx
);
2030 oberon_expr_t
* inter
= oberon_factor(ctx
);
2031 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2037 #define ISADDOP(x) \
2038 ((x) >= PLUS && (x) <= OR)
2040 static oberon_expr_t
*
2041 oberon_simple_expr(oberon_context_t
* ctx
)
2043 oberon_expr_t
* expr
;
2046 if(ctx
-> token
== PLUS
)
2049 oberon_assert_token(ctx
, PLUS
);
2051 else if(ctx
-> token
== MINUS
)
2054 oberon_assert_token(ctx
, MINUS
);
2057 expr
= oberon_term_expr(ctx
);
2059 while(ISADDOP(ctx
-> token
))
2061 int token
= ctx
-> token
;
2062 oberon_read_token(ctx
);
2064 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2065 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2070 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2076 #define ISRELATION(x) \
2077 ((x) >= EQUAL && (x) <= IS)
2079 static oberon_expr_t
*
2080 oberon_expr(oberon_context_t
* ctx
)
2082 oberon_expr_t
* expr
;
2084 expr
= oberon_simple_expr(ctx
);
2085 while(ISRELATION(ctx
-> token
))
2087 int token
= ctx
-> token
;
2088 oberon_read_token(ctx
);
2090 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2091 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2098 oberon_is_const(oberon_expr_t
* expr
)
2100 if(expr
-> is_item
== false)
2105 switch(expr
-> item
.mode
)
2127 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2129 if(!oberon_is_const(expr
))
2131 oberon_error(ctx
, "const expression are required");
2135 static oberon_item_t
*
2136 oberon_const_expr(oberon_context_t
* ctx
)
2138 oberon_expr_t
* expr
;
2139 expr
= oberon_expr(ctx
);
2140 oberon_check_const(ctx
, expr
);
2141 return (oberon_item_t
*) expr
;
2144 // =======================================================================
2146 // =======================================================================
2148 static void oberon_decl_seq(oberon_context_t
* ctx
);
2149 static void oberon_statement_seq(oberon_context_t
* ctx
);
2150 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2153 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2155 if(ctx
-> token
!= token
)
2157 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2162 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2164 oberon_expect_token(ctx
, token
);
2165 oberon_read_token(ctx
);
2169 oberon_assert_ident(oberon_context_t
* ctx
)
2171 oberon_expect_token(ctx
, IDENT
);
2172 char * ident
= ctx
-> string
;
2173 oberon_read_token(ctx
);
2178 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2180 switch(ctx
-> token
)
2183 oberon_assert_token(ctx
, STAR
);
2188 oberon_assert_token(ctx
, MINUS
);
2199 static oberon_object_t
*
2200 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2205 oberon_object_t
* x
;
2207 name
= oberon_assert_ident(ctx
);
2208 oberon_def(ctx
, &export
, &read_only
);
2210 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2215 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2218 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2219 while(ctx
-> token
== COMMA
)
2221 oberon_assert_token(ctx
, COMMA
);
2222 oberon_ident_def(ctx
, class, check_upscope
);
2228 oberon_var_decl(oberon_context_t
* ctx
)
2231 oberon_object_t
* list
;
2232 oberon_type_t
* type
;
2233 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2235 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2236 oberon_assert_token(ctx
, COLON
);
2237 oberon_type(ctx
, &type
);
2239 oberon_object_t
* var
= list
;
2240 for(int i
= 0; i
< num
; i
++)
2247 static oberon_object_t
*
2248 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2250 int class = OBERON_CLASS_PARAM
;
2251 if(ctx
-> token
== VAR
)
2253 oberon_read_token(ctx
);
2254 class = OBERON_CLASS_VAR_PARAM
;
2258 oberon_object_t
* list
;
2259 oberon_ident_list(ctx
, class, false, &num
, &list
);
2261 oberon_assert_token(ctx
, COLON
);
2263 oberon_type_t
* type
;
2264 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2265 oberon_type(ctx
, &type
);
2267 oberon_object_t
* param
= list
;
2268 for(int i
= 0; i
< num
; i
++)
2270 param
-> type
= type
;
2271 param
= param
-> next
;
2278 #define ISFPSECTION \
2279 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2282 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2284 oberon_assert_token(ctx
, LPAREN
);
2288 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2289 while(ctx
-> token
== SEMICOLON
)
2291 oberon_assert_token(ctx
, SEMICOLON
);
2292 oberon_fp_section(ctx
, &signature
-> num_decl
);
2296 oberon_assert_token(ctx
, RPAREN
);
2298 if(ctx
-> token
== COLON
)
2300 oberon_assert_token(ctx
, COLON
);
2302 oberon_object_t
* typeobj
;
2303 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2304 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2306 oberon_error(ctx
, "function result is not type");
2308 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2309 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2311 oberon_error(ctx
, "records or arrays could not be result of function");
2313 signature
-> base
= typeobj
-> type
;
2318 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2320 oberon_type_t
* signature
;
2322 signature
-> class = OBERON_TYPE_PROCEDURE
;
2323 signature
-> num_decl
= 0;
2324 signature
-> base
= ctx
-> notype_type
;
2325 signature
-> decl
= NULL
;
2327 if(ctx
-> token
== LPAREN
)
2329 oberon_formal_pars(ctx
, signature
);
2334 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2336 if(a
-> num_decl
!= b
-> num_decl
)
2338 oberon_error(ctx
, "number parameters not matched");
2341 int num_param
= a
-> num_decl
;
2342 oberon_object_t
* param_a
= a
-> decl
;
2343 oberon_object_t
* param_b
= b
-> decl
;
2344 for(int i
= 0; i
< num_param
; i
++)
2346 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2348 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2351 if(param_a
-> type
!= param_b
-> type
)
2353 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2356 param_a
= param_a
-> next
;
2357 param_b
= param_b
-> next
;
2362 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2364 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2365 oberon_type_t
* result_type
= proc
-> type
-> base
;
2367 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2371 oberon_error(ctx
, "procedure has no result type");
2378 oberon_error(ctx
, "procedure requires expression on result");
2381 oberon_check_src(ctx
, expr
);
2382 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2383 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2386 proc
-> has_return
= 1;
2388 oberon_generate_return(ctx
, expr
);
2392 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2394 oberon_assert_token(ctx
, SEMICOLON
);
2396 ctx
-> decl
= proc
-> scope
;
2398 oberon_decl_seq(ctx
);
2400 oberon_generate_begin_proc(ctx
, proc
);
2402 if(ctx
-> token
== BEGIN
)
2404 oberon_assert_token(ctx
, BEGIN
);
2405 oberon_statement_seq(ctx
);
2408 oberon_assert_token(ctx
, END
);
2409 char * name
= oberon_assert_ident(ctx
);
2410 if(strcmp(name
, proc
-> name
) != 0)
2412 oberon_error(ctx
, "procedure name not matched");
2415 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
)
2417 oberon_make_return(ctx
, NULL
);
2420 if(proc
-> has_return
== 0)
2422 oberon_error(ctx
, "procedure requires return");
2425 oberon_generate_end_proc(ctx
);
2426 oberon_close_scope(ctx
-> decl
);
2430 oberon_proc_decl(oberon_context_t
* ctx
)
2432 oberon_assert_token(ctx
, PROCEDURE
);
2435 if(ctx
-> token
== UPARROW
)
2437 oberon_assert_token(ctx
, UPARROW
);
2444 name
= oberon_assert_ident(ctx
);
2445 oberon_def(ctx
, &export
, &read_only
);
2447 oberon_scope_t
* proc_scope
;
2448 proc_scope
= oberon_open_scope(ctx
);
2449 ctx
-> decl
-> local
= 1;
2451 oberon_type_t
* signature
;
2452 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2453 oberon_opt_formal_pars(ctx
, &signature
);
2455 //oberon_initialize_decl(ctx);
2456 oberon_generator_init_type(ctx
, signature
);
2457 oberon_close_scope(ctx
-> decl
);
2459 oberon_object_t
* proc
;
2460 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2463 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2464 proc
-> type
= signature
;
2465 proc
-> scope
= proc_scope
;
2466 oberon_generator_init_proc(ctx
, proc
);
2470 if(proc
-> class != OBERON_CLASS_PROC
)
2472 oberon_error(ctx
, "mult definition");
2479 oberon_error(ctx
, "mult procedure definition");
2483 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2485 oberon_error(ctx
, "export type not matched");
2488 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2491 proc_scope
-> parent
= proc
;
2492 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2495 param
-> parent
= proc
;
2496 param
= param
-> next
;
2502 oberon_proc_decl_body(ctx
, proc
);
2507 oberon_const_decl(oberon_context_t
* ctx
)
2509 oberon_item_t
* value
;
2510 oberon_object_t
* constant
;
2512 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2513 oberon_assert_token(ctx
, EQUAL
);
2514 value
= oberon_const_expr(ctx
);
2515 constant
-> value
= value
;
2519 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2521 if(size
-> is_item
== 0)
2523 oberon_error(ctx
, "requires constant");
2526 if(size
-> item
.mode
!= MODE_INTEGER
)
2528 oberon_error(ctx
, "requires integer constant");
2531 oberon_type_t
* arr
;
2533 arr
-> class = OBERON_TYPE_ARRAY
;
2534 arr
-> size
= size
-> item
.integer
;
2539 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2542 oberon_object_t
* to
;
2544 to
= oberon_qualident(ctx
, &name
, 0);
2546 //name = oberon_assert_ident(ctx);
2547 //to = oberon_find_object(ctx -> decl, name, 0);
2551 if(to
-> class != OBERON_CLASS_TYPE
)
2553 oberon_error(ctx
, "not a type");
2558 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2559 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2565 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2568 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2572 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2580 oberon_type_t
* dim
;
2581 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2583 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2585 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2589 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2591 type
-> class = OBERON_TYPE_ARRAY
;
2593 type
-> base
= base
;
2597 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2599 if(ctx
-> token
== IDENT
)
2602 oberon_object_t
* list
;
2603 oberon_type_t
* type
;
2604 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2606 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2607 oberon_assert_token(ctx
, COLON
);
2609 oberon_scope_t
* current
= ctx
-> decl
;
2610 ctx
-> decl
= modscope
;
2611 oberon_type(ctx
, &type
);
2612 ctx
-> decl
= current
;
2614 oberon_object_t
* field
= list
;
2615 for(int i
= 0; i
< num
; i
++)
2617 field
-> type
= type
;
2618 field
= field
-> next
;
2621 rec
-> num_decl
+= num
;
2626 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2628 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2629 oberon_scope_t
* oldscope
= ctx
-> decl
;
2630 ctx
-> decl
= modscope
;
2632 if(ctx
-> token
== LPAREN
)
2634 oberon_assert_token(ctx
, LPAREN
);
2636 oberon_object_t
* typeobj
;
2637 typeobj
= oberon_qualident(ctx
, NULL
, true);
2639 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2641 oberon_error(ctx
, "base must be type");
2644 oberon_type_t
* base
= typeobj
-> type
;
2645 if(base
-> class == OBERON_TYPE_POINTER
)
2647 base
= base
-> base
;
2650 if(base
-> class != OBERON_TYPE_RECORD
)
2652 oberon_error(ctx
, "base must be record type");
2656 ctx
-> decl
= base
-> scope
;
2658 oberon_assert_token(ctx
, RPAREN
);
2665 oberon_scope_t
* this_scope
;
2666 this_scope
= oberon_open_scope(ctx
);
2667 this_scope
-> local
= true;
2668 this_scope
-> parent
= NULL
;
2669 this_scope
-> parent_type
= rec
;
2671 oberon_field_list(ctx
, rec
, modscope
);
2672 while(ctx
-> token
== SEMICOLON
)
2674 oberon_assert_token(ctx
, SEMICOLON
);
2675 oberon_field_list(ctx
, rec
, modscope
);
2678 rec
-> scope
= this_scope
;
2679 rec
-> decl
= this_scope
-> list
-> next
;
2680 ctx
-> decl
= oldscope
;
2684 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2686 if(ctx
-> token
== IDENT
)
2688 oberon_qualident_type(ctx
, type
);
2690 else if(ctx
-> token
== ARRAY
)
2692 oberon_assert_token(ctx
, ARRAY
);
2695 oberon_expr_t
* sizes
;
2697 if(ISEXPR(ctx
-> token
))
2699 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2702 oberon_assert_token(ctx
, OF
);
2704 oberon_type_t
* base
;
2705 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2706 oberon_type(ctx
, &base
);
2710 oberon_make_open_array(ctx
, base
, *type
);
2714 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2717 else if(ctx
-> token
== RECORD
)
2719 oberon_type_t
* rec
;
2721 rec
-> class = OBERON_TYPE_RECORD
;
2722 rec
-> module
= ctx
-> mod
;
2724 oberon_assert_token(ctx
, RECORD
);
2725 oberon_type_record_body(ctx
, rec
);
2726 oberon_assert_token(ctx
, END
);
2730 else if(ctx
-> token
== POINTER
)
2732 oberon_assert_token(ctx
, POINTER
);
2733 oberon_assert_token(ctx
, TO
);
2735 oberon_type_t
* base
;
2736 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2737 oberon_type(ctx
, &base
);
2739 oberon_type_t
* ptr
;
2741 ptr
-> class = OBERON_TYPE_POINTER
;
2744 else if(ctx
-> token
== PROCEDURE
)
2746 oberon_open_scope(ctx
);
2747 oberon_assert_token(ctx
, PROCEDURE
);
2748 oberon_opt_formal_pars(ctx
, type
);
2749 oberon_close_scope(ctx
-> decl
);
2753 oberon_error(ctx
, "invalid type declaration");
2758 oberon_type_decl(oberon_context_t
* ctx
)
2761 oberon_object_t
* newtype
;
2762 oberon_type_t
* type
;
2766 name
= oberon_assert_ident(ctx
);
2767 oberon_def(ctx
, &export
, &read_only
);
2769 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2772 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2773 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2774 assert(newtype
-> type
);
2778 if(newtype
-> class != OBERON_CLASS_TYPE
)
2780 oberon_error(ctx
, "mult definition");
2783 if(newtype
-> linked
)
2785 oberon_error(ctx
, "mult definition - already linked");
2788 newtype
-> export
= export
;
2789 newtype
-> read_only
= read_only
;
2792 oberon_assert_token(ctx
, EQUAL
);
2794 type
= newtype
-> type
;
2795 oberon_type(ctx
, &type
);
2797 if(type
-> class == OBERON_TYPE_NOTYPE
)
2799 oberon_error(ctx
, "recursive alias declaration");
2802 newtype
-> type
= type
;
2803 newtype
-> linked
= 1;
2806 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2807 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2810 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2812 if(type
-> class != OBERON_TYPE_POINTER
2813 && type
-> class != OBERON_TYPE_ARRAY
)
2818 if(type
-> recursive
)
2820 if(type
-> class == OBERON_TYPE_POINTER
)
2822 oberon_error(ctx
, "recursive pointer declaration");
2826 oberon_error(ctx
, "recursive array declaration (pointer)");
2830 if(type
-> class == OBERON_TYPE_POINTER
2831 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2833 oberon_error(ctx
, "attempt to make pointer to pointer");
2836 type
-> recursive
= 1;
2838 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2840 type
-> recursive
= 0;
2844 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2846 if(type
-> class != OBERON_TYPE_RECORD
)
2851 if(type
-> recursive
)
2853 oberon_error(ctx
, "recursive record declaration");
2856 type
-> recursive
= 1;
2860 oberon_prevent_recursive_record(ctx
, type
-> base
);
2863 int num_fields
= type
-> num_decl
;
2864 oberon_object_t
* field
= type
-> decl
;
2865 for(int i
= 0; i
< num_fields
; i
++)
2867 oberon_prevent_recursive_object(ctx
, field
);
2868 field
= field
-> next
;
2871 type
-> recursive
= 0;
2874 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2876 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2881 if(type
-> recursive
)
2883 oberon_error(ctx
, "recursive procedure declaration");
2886 type
-> recursive
= 1;
2888 int num_fields
= type
-> num_decl
;
2889 oberon_object_t
* field
= type
-> decl
;
2890 for(int i
= 0; i
< num_fields
; i
++)
2892 oberon_prevent_recursive_object(ctx
, field
);
2893 field
= field
-> next
;
2896 type
-> recursive
= 0;
2900 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2902 if(type
-> class != OBERON_TYPE_ARRAY
)
2907 if(type
-> recursive
)
2909 oberon_error(ctx
, "recursive array declaration");
2912 type
-> recursive
= 1;
2914 oberon_prevent_recursive_type(ctx
, type
-> base
);
2916 type
-> recursive
= 0;
2920 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2922 if(type
-> class == OBERON_TYPE_POINTER
)
2924 oberon_prevent_recursive_pointer(ctx
, type
);
2926 else if(type
-> class == OBERON_TYPE_RECORD
)
2928 oberon_prevent_recursive_record(ctx
, type
);
2930 else if(type
-> class == OBERON_TYPE_ARRAY
)
2932 oberon_prevent_recursive_array(ctx
, type
);
2934 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2936 oberon_prevent_recursive_procedure(ctx
, type
);
2941 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2945 case OBERON_CLASS_VAR
:
2946 case OBERON_CLASS_TYPE
:
2947 case OBERON_CLASS_PARAM
:
2948 case OBERON_CLASS_VAR_PARAM
:
2949 case OBERON_CLASS_FIELD
:
2950 oberon_prevent_recursive_type(ctx
, x
-> type
);
2952 case OBERON_CLASS_CONST
:
2953 case OBERON_CLASS_PROC
:
2954 case OBERON_CLASS_MODULE
:
2957 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2963 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2965 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2969 oberon_prevent_recursive_object(ctx
, x
);
2974 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2975 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2978 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2980 assert(type
-> class == OBERON_TYPE_RECORD
);
2982 int num_fields
= type
-> num_decl
;
2983 oberon_object_t
* field
= type
-> decl
;
2984 for(int i
= 0; i
< num_fields
; i
++)
2986 oberon_initialize_object(ctx
, field
);
2987 field
= field
-> next
;
2990 oberon_generator_init_record(ctx
, type
);
2994 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2996 if(type
-> class == OBERON_TYPE_NOTYPE
)
2998 oberon_error(ctx
, "undeclarated type");
3001 if(type
-> initialized
)
3006 type
-> initialized
= 1;
3008 if(type
-> class == OBERON_TYPE_POINTER
|| type
-> class == OBERON_TYPE_ARRAY
)
3010 if(type
-> class == OBERON_TYPE_ARRAY
3011 && type
-> size
!= 0
3012 && type
-> base
-> class == OBERON_TYPE_ARRAY
3013 && type
-> base
-> size
== 0)
3015 oberon_error(ctx
, "open array not allowed as array element");
3018 oberon_type_t
* rec
= type
-> base
;
3019 while(rec
-> class == OBERON_TYPE_ARRAY
|| rec
-> class == OBERON_TYPE_POINTER
)
3024 if(rec
-> class == OBERON_TYPE_RECORD
3025 && rec
-> initialized
== 0)
3027 rec
-> initialized
= 1;
3028 oberon_generator_init_type(ctx
, rec
);
3029 oberon_initialize_type(ctx
, type
-> base
);
3030 oberon_generator_init_type(ctx
, type
);
3031 oberon_initialize_record_fields(ctx
, rec
);
3035 oberon_initialize_type(ctx
, type
-> base
);
3036 oberon_generator_init_type(ctx
, type
);
3039 else if(type
-> class == OBERON_TYPE_RECORD
)
3041 printf("Init type: RECORD\n");
3042 oberon_generator_init_type(ctx
, type
);
3043 oberon_initialize_record_fields(ctx
, type
);
3045 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3047 printf("Init type: PROCEDURE\n");
3048 int num_fields
= type
-> num_decl
;
3049 oberon_object_t
* field
= type
-> decl
;
3050 for(int i
= 0; i
< num_fields
; i
++)
3052 oberon_initialize_type(ctx
, field
-> type
);
3053 field
= field
-> next
;
3056 oberon_generator_init_type(ctx
, type
);
3060 oberon_generator_init_type(ctx
, type
);
3065 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3067 if(x
-> initialized
)
3072 x
-> initialized
= 1;
3076 case OBERON_CLASS_TYPE
:
3077 oberon_initialize_type(ctx
, x
-> type
);
3079 case OBERON_CLASS_VAR
:
3080 case OBERON_CLASS_FIELD
:
3081 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3083 if(x
-> type
-> size
== 0)
3085 oberon_error(ctx
, "open array not allowed as variable or field");
3088 oberon_initialize_type(ctx
, x
-> type
);
3089 oberon_generator_init_var(ctx
, x
);
3091 case OBERON_CLASS_PARAM
:
3092 case OBERON_CLASS_VAR_PARAM
:
3093 oberon_initialize_type(ctx
, x
-> type
);
3094 oberon_generator_init_var(ctx
, x
);
3096 case OBERON_CLASS_CONST
:
3097 case OBERON_CLASS_PROC
:
3098 case OBERON_CLASS_MODULE
:
3101 oberon_error(ctx
, "oberon_initialize_object: wat");
3107 oberon_initialize_decl(oberon_context_t
* ctx
)
3109 oberon_object_t
* x
= ctx
-> decl
-> list
;
3113 oberon_initialize_object(ctx
, x
-> next
);
3119 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3121 oberon_object_t
* x
= ctx
-> decl
-> list
;
3125 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3127 if(x
-> next
-> linked
== 0)
3129 oberon_error(ctx
, "unresolved forward declaration");
3137 oberon_decl_seq(oberon_context_t
* ctx
)
3139 if(ctx
-> token
== CONST
)
3141 oberon_assert_token(ctx
, CONST
);
3142 while(ctx
-> token
== IDENT
)
3144 oberon_const_decl(ctx
);
3145 oberon_assert_token(ctx
, SEMICOLON
);
3149 if(ctx
-> token
== TYPE
)
3151 oberon_assert_token(ctx
, TYPE
);
3152 while(ctx
-> token
== IDENT
)
3154 oberon_type_decl(ctx
);
3155 oberon_assert_token(ctx
, SEMICOLON
);
3159 if(ctx
-> token
== VAR
)
3161 oberon_assert_token(ctx
, VAR
);
3162 while(ctx
-> token
== IDENT
)
3164 oberon_var_decl(ctx
);
3165 oberon_assert_token(ctx
, SEMICOLON
);
3169 oberon_prevent_recursive_decl(ctx
);
3170 oberon_initialize_decl(ctx
);
3172 while(ctx
-> token
== PROCEDURE
)
3174 oberon_proc_decl(ctx
);
3175 oberon_assert_token(ctx
, SEMICOLON
);
3178 oberon_prevent_undeclarated_procedures(ctx
);
3181 static oberon_expr_t
*
3182 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3184 oberon_object_t
* x
;
3185 oberon_expr_t
* expr
;
3187 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3190 oberon_generator_init_temp_var(ctx
, x
);
3192 expr
= oberon_new_item(MODE_VAR
, type
, false);
3193 expr
-> item
.var
= x
;
3198 oberon_statement_seq(oberon_context_t
* ctx
);
3201 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3203 oberon_check_dst(ctx
, dst
);
3204 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3206 if(oberon_is_array_of_char_type(dst
-> result
)
3207 && oberon_is_string_type(src
-> result
))
3210 oberon_make_copy_call(ctx
, 2, src
);
3214 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3215 oberon_generate_assign(ctx
, src
, dst
);
3219 static oberon_expr_t
*
3220 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3224 oberon_expr_t
* cond
;
3225 oberon_expr_t
* cond2
;
3227 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3230 if(ctx
-> token
== DOTDOT
)
3232 oberon_assert_token(ctx
, DOTDOT
);
3233 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3239 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3243 /* val >= e1 && val <= e2 */
3244 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3245 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3246 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3253 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3255 oberon_expr_t
* cond
;
3256 oberon_expr_t
* cond2
;
3257 gen_label_t
* this_end
;
3259 if(ISEXPR(ctx
-> token
))
3261 this_end
= oberon_generator_reserve_label(ctx
);
3263 cond
= oberon_case_labels(ctx
, val
);
3264 while(ctx
-> token
== COMMA
)
3266 oberon_assert_token(ctx
, COMMA
);
3268 cond2
= oberon_case_labels(ctx
, val
);
3269 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3271 oberon_assert_token(ctx
, COLON
);
3273 oberon_generate_branch(ctx
, cond
, false, this_end
);
3274 oberon_statement_seq(ctx
);
3275 oberon_generate_goto(ctx
, end
);
3277 oberon_generate_label(ctx
, this_end
);
3282 oberon_case_statement(oberon_context_t
* ctx
)
3284 oberon_expr_t
* val
;
3285 oberon_expr_t
* expr
;
3288 end
= oberon_generator_reserve_label(ctx
);
3290 oberon_assert_token(ctx
, CASE
);
3291 expr
= oberon_expr(ctx
);
3292 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3293 oberon_assign(ctx
, expr
, val
);
3294 oberon_assert_token(ctx
, OF
);
3295 oberon_case(ctx
, val
, end
);
3296 while(ctx
-> token
== BAR
)
3298 oberon_assert_token(ctx
, BAR
);
3299 oberon_case(ctx
, val
, end
);
3302 if(ctx
-> token
== ELSE
)
3304 oberon_assert_token(ctx
, ELSE
);
3305 oberon_statement_seq(ctx
);
3309 oberon_generate_trap(ctx
, -1);
3312 oberon_generate_label(ctx
, end
);
3313 oberon_assert_token(ctx
, END
);
3317 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3319 oberon_expr_t
* val
;
3320 oberon_expr_t
* var
;
3321 oberon_expr_t
* type
;
3322 oberon_expr_t
* cond
;
3323 oberon_expr_t
* cast
;
3324 oberon_type_t
* old_type
;
3325 gen_var_t
* old_var
;
3326 gen_label_t
* this_end
;
3328 this_end
= oberon_generator_reserve_label(ctx
);
3330 var
= oberon_qualident_expr(ctx
);
3331 oberon_assert_token(ctx
, COLON
);
3332 type
= oberon_qualident_expr(ctx
);
3333 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3335 oberon_assert_token(ctx
, DO
);
3336 oberon_generate_branch(ctx
, cond
, false, this_end
);
3338 /* Сохраняем ссылку во временной переменной */
3339 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3340 //cast = oberno_make_record_cast(ctx, var, type -> result);
3341 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3342 oberon_assign(ctx
, cast
, val
);
3343 /* Подменяем тип у оригинальной переменной */
3344 old_type
= var
-> item
.var
-> type
;
3345 var
-> item
.var
-> type
= type
-> result
;
3346 /* Подменяем ссылку на переменную */
3347 old_var
= var
-> item
.var
-> gen_var
;
3348 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3350 oberon_statement_seq(ctx
);
3351 oberon_generate_goto(ctx
, end
);
3352 oberon_generate_label(ctx
, this_end
);
3354 /* Возвращаем исходное состояние */
3355 var
-> item
.var
-> gen_var
= old_var
;
3356 var
-> item
.var
-> type
= old_type
;
3360 oberon_with_statement(oberon_context_t
* ctx
)
3363 end
= oberon_generator_reserve_label(ctx
);
3365 oberon_assert_token(ctx
, WITH
);
3366 oberon_with_guard_do(ctx
, end
);
3367 while(ctx
-> token
== BAR
)
3369 oberon_assert_token(ctx
, BAR
);
3370 oberon_with_guard_do(ctx
, end
);
3373 if(ctx
-> token
== ELSE
)
3375 oberon_assert_token(ctx
, ELSE
);
3376 oberon_statement_seq(ctx
);
3380 oberon_generate_trap(ctx
, -2);
3383 oberon_generate_label(ctx
, end
);
3384 oberon_assert_token(ctx
, END
);
3388 oberon_statement(oberon_context_t
* ctx
)
3390 oberon_expr_t
* item1
;
3391 oberon_expr_t
* item2
;
3393 if(ctx
-> token
== IDENT
)
3395 item1
= oberon_designator(ctx
);
3396 if(ctx
-> token
== ASSIGN
)
3398 oberon_assert_token(ctx
, ASSIGN
);
3399 item2
= oberon_expr(ctx
);
3400 oberon_assign(ctx
, item2
, item1
);
3404 oberon_opt_proc_parens(ctx
, item1
);
3407 else if(ctx
-> token
== IF
)
3411 oberon_expr_t
* cond
;
3413 els
= oberon_generator_reserve_label(ctx
);
3414 end
= oberon_generator_reserve_label(ctx
);
3416 oberon_assert_token(ctx
, IF
);
3417 cond
= oberon_expr(ctx
);
3418 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3420 oberon_error(ctx
, "condition must be boolean");
3422 oberon_assert_token(ctx
, THEN
);
3423 oberon_generate_branch(ctx
, cond
, false, els
);
3424 oberon_statement_seq(ctx
);
3425 oberon_generate_goto(ctx
, end
);
3426 oberon_generate_label(ctx
, els
);
3428 while(ctx
-> token
== ELSIF
)
3430 els
= oberon_generator_reserve_label(ctx
);
3432 oberon_assert_token(ctx
, ELSIF
);
3433 cond
= oberon_expr(ctx
);
3434 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3436 oberon_error(ctx
, "condition must be boolean");
3438 oberon_assert_token(ctx
, THEN
);
3439 oberon_generate_branch(ctx
, cond
, false, els
);
3440 oberon_statement_seq(ctx
);
3441 oberon_generate_goto(ctx
, end
);
3442 oberon_generate_label(ctx
, els
);
3445 if(ctx
-> token
== ELSE
)
3447 oberon_assert_token(ctx
, ELSE
);
3448 oberon_statement_seq(ctx
);
3451 oberon_generate_label(ctx
, end
);
3452 oberon_assert_token(ctx
, END
);
3454 else if(ctx
-> token
== WHILE
)
3456 gen_label_t
* begin
;
3458 oberon_expr_t
* cond
;
3460 begin
= oberon_generator_reserve_label(ctx
);
3461 end
= oberon_generator_reserve_label(ctx
);
3463 oberon_assert_token(ctx
, WHILE
);
3464 oberon_generate_label(ctx
, begin
);
3465 cond
= oberon_expr(ctx
);
3466 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3468 oberon_error(ctx
, "condition must be boolean");
3470 oberon_generate_branch(ctx
, cond
, false, end
);
3472 oberon_assert_token(ctx
, DO
);
3473 oberon_statement_seq(ctx
);
3474 oberon_generate_goto(ctx
, begin
);
3476 oberon_assert_token(ctx
, END
);
3477 oberon_generate_label(ctx
, end
);
3479 else if(ctx
-> token
== REPEAT
)
3481 gen_label_t
* begin
;
3482 oberon_expr_t
* cond
;
3484 begin
= oberon_generator_reserve_label(ctx
);
3485 oberon_generate_label(ctx
, begin
);
3486 oberon_assert_token(ctx
, REPEAT
);
3488 oberon_statement_seq(ctx
);
3490 oberon_assert_token(ctx
, UNTIL
);
3492 cond
= oberon_expr(ctx
);
3493 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3495 oberon_error(ctx
, "condition must be boolean");
3498 oberon_generate_branch(ctx
, cond
, true, begin
);
3500 else if(ctx
-> token
== FOR
)
3502 oberon_expr_t
* from
;
3503 oberon_expr_t
* index
;
3505 oberon_expr_t
* bound
;
3507 oberon_expr_t
* cond
;
3508 oberon_expr_t
* count
;
3509 gen_label_t
* begin
;
3514 begin
= oberon_generator_reserve_label(ctx
);
3515 end
= oberon_generator_reserve_label(ctx
);
3517 oberon_assert_token(ctx
, FOR
);
3518 iname
= oberon_assert_ident(ctx
);
3519 index
= oberon_ident_item(ctx
, iname
);
3520 oberon_assert_token(ctx
, ASSIGN
);
3521 from
= oberon_expr(ctx
);
3522 oberon_assert_token(ctx
, TO
);
3523 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3524 to
= oberon_expr(ctx
);
3525 oberon_assign(ctx
, to
, bound
); // сначала temp
3526 oberon_assign(ctx
, from
, index
); // потом i
3527 if(ctx
-> token
== BY
)
3529 oberon_assert_token(ctx
, BY
);
3530 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3534 by
= oberon_make_integer(ctx
, 1);
3537 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3539 oberon_error(ctx
, "must be integer");
3542 if(by
-> item
.integer
> 0)
3546 else if(by
-> item
.integer
< 0)
3552 oberon_error(ctx
, "zero step not allowed");
3555 oberon_assert_token(ctx
, DO
);
3556 oberon_generate_label(ctx
, begin
);
3557 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3558 oberon_generate_branch(ctx
, cond
, false, end
);
3559 oberon_statement_seq(ctx
);
3560 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3561 oberon_assign(ctx
, count
, index
);
3562 oberon_generate_goto(ctx
, begin
);
3563 oberon_generate_label(ctx
, end
);
3564 oberon_assert_token(ctx
, END
);
3566 else if(ctx
-> token
== LOOP
)
3568 gen_label_t
* begin
;
3571 begin
= oberon_generator_reserve_label(ctx
);
3572 end
= oberon_generator_reserve_label(ctx
);
3574 oberon_open_scope(ctx
);
3575 oberon_assert_token(ctx
, LOOP
);
3576 oberon_generate_label(ctx
, begin
);
3577 ctx
-> decl
-> exit_label
= end
;
3578 oberon_statement_seq(ctx
);
3579 oberon_generate_goto(ctx
, begin
);
3580 oberon_generate_label(ctx
, end
);
3581 oberon_assert_token(ctx
, END
);
3582 oberon_close_scope(ctx
-> decl
);
3584 else if(ctx
-> token
== EXIT
)
3586 oberon_assert_token(ctx
, EXIT
);
3587 if(ctx
-> decl
-> exit_label
== NULL
)
3589 oberon_error(ctx
, "not in LOOP-END");
3591 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3593 else if(ctx
-> token
== CASE
)
3595 oberon_case_statement(ctx
);
3597 else if(ctx
-> token
== WITH
)
3599 oberon_with_statement(ctx
);
3601 else if(ctx
-> token
== RETURN
)
3603 oberon_assert_token(ctx
, RETURN
);
3604 if(ISEXPR(ctx
-> token
))
3606 oberon_expr_t
* expr
;
3607 expr
= oberon_expr(ctx
);
3608 oberon_make_return(ctx
, expr
);
3612 oberon_make_return(ctx
, NULL
);
3618 oberon_statement_seq(oberon_context_t
* ctx
)
3620 oberon_statement(ctx
);
3621 while(ctx
-> token
== SEMICOLON
)
3623 oberon_assert_token(ctx
, SEMICOLON
);
3624 oberon_statement(ctx
);
3629 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3631 oberon_module_t
* m
= ctx
-> module_list
;
3632 while(m
&& strcmp(m
-> name
, name
) != 0)
3639 oberon_scanner_t
* s
;
3640 s
= ctx
-> import_module(name
);
3643 oberon_error(ctx
, "no such module %s", name
);
3646 m
= oberon_compile_module(ctx
, s
);
3652 oberon_error(ctx
, "cyclic module import");
3655 oberon_object_t
* ident
;
3656 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3657 ident
-> module
= m
;
3661 oberon_import_decl(oberon_context_t
* ctx
)
3666 alias
= name
= oberon_assert_ident(ctx
);
3667 if(ctx
-> token
== ASSIGN
)
3669 oberon_assert_token(ctx
, ASSIGN
);
3670 name
= oberon_assert_ident(ctx
);
3673 oberon_import_module(ctx
, alias
, name
);
3677 oberon_import_list(oberon_context_t
* ctx
)
3679 oberon_assert_token(ctx
, IMPORT
);
3681 oberon_import_decl(ctx
);
3682 while(ctx
-> token
== COMMA
)
3684 oberon_assert_token(ctx
, COMMA
);
3685 oberon_import_decl(ctx
);
3688 oberon_assert_token(ctx
, SEMICOLON
);
3692 oberon_parse_module(oberon_context_t
* ctx
)
3696 oberon_read_token(ctx
);
3698 oberon_assert_token(ctx
, MODULE
);
3699 name1
= oberon_assert_ident(ctx
);
3700 oberon_assert_token(ctx
, SEMICOLON
);
3701 ctx
-> mod
-> name
= name1
;
3703 oberon_generator_init_module(ctx
, ctx
-> mod
);
3705 if(ctx
-> token
== IMPORT
)
3707 oberon_import_list(ctx
);
3710 oberon_decl_seq(ctx
);
3712 oberon_generate_begin_module(ctx
);
3713 if(ctx
-> token
== BEGIN
)
3715 oberon_assert_token(ctx
, BEGIN
);
3716 oberon_statement_seq(ctx
);
3718 oberon_generate_end_module(ctx
);
3720 oberon_assert_token(ctx
, END
);
3721 name2
= oberon_assert_ident(ctx
);
3722 oberon_expect_token(ctx
, DOT
);
3724 if(strcmp(name1
, name2
) != 0)
3726 oberon_error(ctx
, "module name not matched");
3729 oberon_generator_fini_module(ctx
-> mod
);
3732 // =======================================================================
3734 // =======================================================================
3736 static oberon_expr_t
*
3737 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3741 oberon_error(ctx
, "too few arguments");
3746 oberon_error(ctx
, "too mach arguments");
3749 oberon_expr_t
* arg
;
3752 if(!oberon_is_type_expr(arg
))
3754 oberon_error(ctx
, "MIN accept only type");
3757 oberon_expr_t
* expr
;
3758 int bits
= arg
-> result
-> size
* 8;
3759 switch(arg
-> result
-> class)
3761 case OBERON_TYPE_INTEGER
:
3762 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3764 case OBERON_TYPE_BOOLEAN
:
3765 expr
= oberon_make_boolean(ctx
, false);
3767 case OBERON_TYPE_CHAR
:
3768 expr
= oberon_make_char(ctx
, 0);
3770 case OBERON_TYPE_REAL
:
3771 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3773 case OBERON_TYPE_SET
:
3774 expr
= oberon_make_integer(ctx
, 0);
3777 oberon_error(ctx
, "allowed only basic types");
3784 static oberon_expr_t
*
3785 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3789 oberon_error(ctx
, "too few arguments");
3794 oberon_error(ctx
, "too mach arguments");
3797 oberon_expr_t
* arg
;
3800 if(!oberon_is_type_expr(arg
))
3802 oberon_error(ctx
, "MAX accept only type");
3805 oberon_expr_t
* expr
;
3806 int bits
= arg
-> result
-> size
* 8;
3807 switch(arg
-> result
-> class)
3809 case OBERON_TYPE_INTEGER
:
3810 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3812 case OBERON_TYPE_BOOLEAN
:
3813 expr
= oberon_make_boolean(ctx
, true);
3815 case OBERON_TYPE_CHAR
:
3816 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3818 case OBERON_TYPE_REAL
:
3819 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3821 case OBERON_TYPE_SET
:
3822 expr
= oberon_make_integer(ctx
, bits
);
3825 oberon_error(ctx
, "allowed only basic types");
3832 static oberon_expr_t
*
3833 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3837 oberon_error(ctx
, "too few arguments");
3842 oberon_error(ctx
, "too mach arguments");
3845 oberon_expr_t
* arg
;
3847 if(!oberon_is_type_expr(arg
))
3849 oberon_error(ctx
, "SIZE accept only type");
3853 oberon_expr_t
* expr
;
3854 oberon_type_t
* type
= arg
-> result
;
3855 switch(type
-> class)
3857 case OBERON_TYPE_INTEGER
:
3858 case OBERON_TYPE_BOOLEAN
:
3859 case OBERON_TYPE_REAL
:
3860 case OBERON_TYPE_CHAR
:
3861 case OBERON_TYPE_SET
:
3862 size
= type
-> size
;
3865 oberon_error(ctx
, "TODO SIZE");
3869 expr
= oberon_make_integer(ctx
, size
);
3873 static oberon_expr_t
*
3874 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3878 oberon_error(ctx
, "too few arguments");
3883 oberon_error(ctx
, "too mach arguments");
3886 oberon_expr_t
* arg
;
3888 oberon_check_src(ctx
, arg
);
3890 if(!oberon_is_number_type(arg
-> result
))
3892 oberon_error(ctx
, "ABS accepts only numbers");
3895 oberon_expr_t
* expr
;
3896 if(oberon_is_const(arg
))
3898 if(oberon_is_real_type(arg
-> result
))
3900 double x
= arg
-> item
.real
;
3901 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3905 int64_t x
= arg
-> item
.integer
;
3906 expr
= oberon_make_integer(ctx
, llabs(x
));
3911 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3917 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3921 oberon_error(ctx
, "too few arguments");
3926 oberon_error(ctx
, "too mach arguments");
3929 oberon_expr_t
* dst
;
3931 oberon_check_dst(ctx
, dst
);
3933 if(!oberon_is_integer_type(dst
-> result
))
3935 oberon_error(ctx
, "expect integer");
3938 oberon_expr_t
* step
;
3941 step
= list_args
-> next
;
3942 oberon_check_src(ctx
, step
);
3943 oberon_check_const(ctx
, step
);
3944 if(!oberon_is_integer_type(step
-> result
))
3946 oberon_error(ctx
, "expect integer");
3951 step
= oberon_make_integer(ctx
, 1);
3954 oberon_expr_t
* expr
;
3955 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, step
);
3956 oberon_assign(ctx
, expr
, dst
);
3960 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3964 oberon_error(ctx
, "too few arguments");
3969 oberon_error(ctx
, "too mach arguments");
3972 oberon_expr_t
* dst
;
3974 oberon_check_dst(ctx
, dst
);
3976 if(!oberon_is_set_type(dst
-> result
))
3978 oberon_error(ctx
, "expect integer");
3982 x
= list_args
-> next
;
3983 oberon_check_src(ctx
, x
);
3985 if(!oberon_is_integer_type(x
-> result
))
3987 oberon_error(ctx
, "expect integer");
3990 oberon_expr_t
* expr
;
3991 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3992 oberon_assign(ctx
, expr
, dst
);
3996 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4000 oberon_error(ctx
, "too few arguments");
4005 oberon_error(ctx
, "too mach arguments");
4008 oberon_expr_t
* dst
;
4010 oberon_check_dst(ctx
, dst
);
4012 if(!oberon_is_set_type(dst
-> result
))
4014 oberon_error(ctx
, "expect integer");
4018 x
= list_args
-> next
;
4019 oberon_check_src(ctx
, x
);
4021 if(!oberon_is_integer_type(x
-> result
))
4023 oberon_error(ctx
, "expect integer");
4026 oberon_expr_t
* expr
;
4027 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
4028 oberon_assign(ctx
, expr
, dst
);
4032 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4036 oberon_error(ctx
, "too few arguments");
4041 oberon_error(ctx
, "too mach arguments");
4044 oberon_expr_t
* dst
;
4046 oberon_check_dst(ctx
, dst
);
4048 if(!oberon_is_integer_type(dst
-> result
))
4050 oberon_error(ctx
, "expect integer");
4053 oberon_expr_t
* step
;
4056 step
= list_args
-> next
;
4057 oberon_check_src(ctx
, step
);
4058 oberon_check_const(ctx
, step
);
4059 if(!oberon_is_integer_type(step
-> result
))
4061 oberon_error(ctx
, "expect integer");
4066 step
= oberon_make_integer(ctx
, 1);
4069 oberon_expr_t
* expr
;
4070 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, step
);
4071 oberon_assign(ctx
, expr
, dst
);
4075 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4079 oberon_error(ctx
, "too few arguments");
4082 oberon_expr_t
* dst
;
4084 oberon_check_dst(ctx
, dst
);
4086 oberon_type_t
* type
;
4087 type
= dst
-> result
;
4089 if(type
-> class != OBERON_TYPE_POINTER
)
4091 oberon_error(ctx
, "not a pointer");
4094 type
= type
-> base
;
4096 oberon_expr_t
* src
;
4097 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4098 src
-> item
.num_args
= 0;
4099 src
-> item
.args
= NULL
;
4102 if(type
-> class == OBERON_TYPE_ARRAY
)
4104 if(type
-> size
== 0)
4106 oberon_type_t
* x
= type
;
4107 while(x
-> class == OBERON_TYPE_ARRAY
)
4117 if(num_args
< max_args
)
4119 oberon_error(ctx
, "too few arguments");
4122 if(num_args
> max_args
)
4124 oberon_error(ctx
, "too mach arguments");
4127 int num_sizes
= max_args
- 1;
4128 oberon_expr_t
* size_list
= list_args
-> next
;
4130 oberon_expr_t
* arg
= size_list
;
4131 for(int i
= 0; i
< max_args
- 1; i
++)
4133 oberon_check_src(ctx
, arg
);
4134 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4136 oberon_error(ctx
, "size must be integer");
4141 src
-> item
.num_args
= num_sizes
;
4142 src
-> item
.args
= size_list
;
4144 else if(type
-> class != OBERON_TYPE_RECORD
)
4146 oberon_error(ctx
, "oberon_make_new_call: wat");
4149 if(num_args
> max_args
)
4151 oberon_error(ctx
, "too mach arguments");
4154 oberon_assign(ctx
, src
, dst
);
4158 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4162 oberon_error(ctx
, "too few arguments");
4167 oberon_error(ctx
, "too mach arguments");
4170 oberon_expr_t
* src
;
4172 oberon_check_src(ctx
, src
);
4174 oberon_expr_t
* dst
;
4175 dst
= list_args
-> next
;
4176 oberon_check_dst(ctx
, dst
);
4178 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4180 oberon_error(ctx
, "source must be string or array of char");
4183 if(!oberon_is_array_of_char_type(dst
-> result
))
4185 oberon_error(ctx
, "dst must be array of char");
4188 oberon_generate_copy(ctx
, src
, dst
);
4192 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4196 oberon_error(ctx
, "too few arguments");
4201 oberon_error(ctx
, "too mach arguments");
4204 oberon_expr_t
* cond
;
4206 oberon_check_src(ctx
, cond
);
4208 if(!oberon_is_boolean_type(cond
-> result
))
4210 oberon_error(ctx
, "expected boolean");
4215 oberon_generate_assert(ctx
, cond
);
4219 oberon_expr_t
* num
;
4220 num
= list_args
-> next
;
4221 oberon_check_src(ctx
, num
);
4223 if(!oberon_is_integer_type(num
-> result
))
4225 oberon_error(ctx
, "expected integer");
4228 oberon_check_const(ctx
, num
);
4230 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4235 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4239 oberon_error(ctx
, "too few arguments");
4244 oberon_error(ctx
, "too mach arguments");
4247 oberon_expr_t
* num
;
4249 oberon_check_src(ctx
, num
);
4251 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4253 oberon_error(ctx
, "expected integer");
4256 oberon_check_const(ctx
, num
);
4258 oberon_generate_halt(ctx
, num
-> item
.integer
);
4261 static oberon_expr_t
*
4262 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4266 oberon_error(ctx
, "too few arguments");
4271 oberon_error(ctx
, "too mach arguments");
4274 oberon_expr_t
* arg1
;
4276 oberon_check_src(ctx
, arg1
);
4277 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4279 oberon_error(ctx
, "expected integer");
4282 oberon_expr_t
* arg2
;
4283 arg2
= list_args
-> next
;
4284 oberon_check_src(ctx
, arg2
);
4285 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4287 oberon_error(ctx
, "expected integer");
4290 oberon_expr_t
* expr
;
4291 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4293 int64_t x
= arg1
-> item
.integer
;
4294 int64_t y
= arg2
-> item
.integer
;
4295 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4296 expr
= oberon_make_integer(ctx
, v
);
4300 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4306 static oberon_expr_t
*
4307 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4311 oberon_error(ctx
, "too few arguments");
4316 oberon_error(ctx
, "too mach arguments");
4319 oberon_expr_t
* arg1
;
4321 oberon_check_src(ctx
, arg1
);
4323 oberon_type_t
* t
= arg1
-> result
;
4324 if(!oberon_is_integer_type(t
)
4325 && !oberon_is_char_type(t
)
4326 && !oberon_is_system_byte_type(t
))
4328 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4331 oberon_expr_t
* arg2
;
4332 arg2
= list_args
-> next
;
4333 oberon_check_src(ctx
, arg2
);
4334 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4336 oberon_error(ctx
, "expected integer");
4339 oberon_expr_t
* expr
;
4340 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4342 uint64_t x
= arg1
-> item
.integer
;
4343 int64_t y
= arg2
-> item
.integer
;
4344 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4346 if(oberon_is_integer_type(t
))
4348 expr
= oberon_make_integer(ctx
, v
);
4350 else if(oberon_is_char_type(t
))
4352 expr
= oberon_make_char(ctx
, v
);
4356 expr
= oberon_make_system_byte(ctx
, v
);
4361 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4362 expr
= oberon_cast_expr(ctx
, expr
, t
);
4368 static oberon_expr_t
*
4369 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4373 oberon_error(ctx
, "too few arguments");
4378 oberon_error(ctx
, "too mach arguments");
4381 oberon_expr_t
* arg1
;
4383 oberon_check_src(ctx
, arg1
);
4385 oberon_type_t
* t
= arg1
-> result
;
4386 if(!oberon_is_integer_type(t
)
4387 && !oberon_is_char_type(t
)
4388 && !oberon_is_system_byte_type(t
))
4390 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4393 oberon_expr_t
* arg2
;
4394 arg2
= list_args
-> next
;
4395 oberon_check_src(ctx
, arg2
);
4396 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4398 oberon_error(ctx
, "expected integer");
4401 oberon_expr_t
* expr
;
4402 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4404 uint64_t x
= arg1
-> item
.integer
;
4405 int64_t y
= arg2
-> item
.integer
;
4410 v
= (x
<< y
) | (x
>> (64 - y
));
4415 v
= (x
>> y
) | (x
<< (64 - y
));
4418 if(oberon_is_integer_type(t
))
4420 expr
= oberon_make_integer(ctx
, v
);
4422 else if(oberon_is_char_type(t
))
4424 expr
= oberon_make_char(ctx
, v
);
4428 expr
= oberon_make_system_byte(ctx
, v
);
4433 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4434 expr
= oberon_cast_expr(ctx
, expr
, t
);
4440 static oberon_expr_t
*
4441 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4445 oberon_error(ctx
, "too few arguments");
4450 oberon_error(ctx
, "too mach arguments");
4453 oberon_expr_t
* arg
;
4455 oberon_check_src(ctx
, arg
);
4457 if(!oberon_is_char_type(arg
-> result
))
4459 oberon_error(ctx
, "expected char");
4462 oberon_expr_t
* expr
;
4463 if(oberon_is_const(arg
))
4465 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4469 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4475 static oberon_expr_t
*
4476 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4480 oberon_error(ctx
, "too few arguments");
4485 oberon_error(ctx
, "too mach arguments");
4488 oberon_expr_t
* arg
;
4490 oberon_check_src(ctx
, arg
);
4492 if(!oberon_is_integer_type(arg
-> result
))
4494 oberon_error(ctx
, "expected integer");
4497 oberon_expr_t
* expr
;
4498 if(oberon_is_const(arg
))
4500 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4504 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4509 static oberon_expr_t
*
4510 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4514 oberon_error(ctx
, "too few arguments");
4519 oberon_error(ctx
, "too mach arguments");
4522 oberon_expr_t
* arg
;
4524 oberon_check_src(ctx
, arg
);
4526 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4528 oberon_error(ctx
, "expected char");
4531 oberon_expr_t
* expr
;
4532 if(oberon_is_const(arg
))
4534 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4538 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> shortint_type
);
4543 static oberon_expr_t
*
4544 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4548 oberon_error(ctx
, "too few arguments");
4553 oberon_error(ctx
, "too mach arguments");
4556 oberon_expr_t
* arg
;
4558 oberon_check_src(ctx
, arg
);
4560 if(!oberon_is_real_type(arg
-> result
))
4562 oberon_error(ctx
, "expected real");
4565 oberon_expr_t
* expr
;
4566 if(oberon_is_const(arg
))
4568 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4572 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4577 static oberon_expr_t
*
4578 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4582 oberon_error(ctx
, "too few arguments");
4587 oberon_error(ctx
, "too mach arguments");
4590 oberon_expr_t
* arg
;
4592 oberon_check_src(ctx
, arg
);
4594 if(!oberon_is_integer_type(arg
-> result
))
4596 oberon_error(ctx
, "expected integer");
4599 oberon_expr_t
* expr
;
4600 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4601 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4605 static oberon_expr_t
*
4606 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4610 oberon_error(ctx
, "too few arguments");
4615 oberon_error(ctx
, "too mach arguments");
4618 oberon_expr_t
* arg
;
4620 oberon_check_src(ctx
, arg
);
4621 oberon_check_const(ctx
, arg
);
4623 if(!oberon_is_integer_type(arg
-> result
))
4625 oberon_error(ctx
, "expected integer");
4628 /* n >= 0 && n <= 15 */
4630 oberon_expr_t
* cond1
;
4631 oberon_expr_t
* cond2
;
4632 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4633 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4634 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4637 static oberon_expr_t
*
4638 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4642 oberon_error(ctx
, "too few arguments");
4647 oberon_error(ctx
, "too mach arguments");
4650 oberon_expr_t
* arg
;
4652 oberon_check_src(ctx
, arg
);
4654 if(arg
-> result
-> shorter
== NULL
)
4656 oberon_error(ctx
, "already shorter");
4659 oberon_expr_t
* expr
;
4660 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4664 static oberon_expr_t
*
4665 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4669 oberon_error(ctx
, "too few arguments");
4674 oberon_error(ctx
, "too mach arguments");
4677 oberon_expr_t
* arg
;
4679 oberon_check_src(ctx
, arg
);
4681 if(arg
-> result
-> longer
== NULL
)
4683 oberon_error(ctx
, "already longer");
4686 oberon_expr_t
* expr
;
4687 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4691 static oberon_expr_t
*
4692 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4696 oberon_error(ctx
, "too few arguments");
4701 oberon_error(ctx
, "too mach arguments");
4704 oberon_expr_t
* typ
;
4706 if(!oberon_is_type_expr(typ
))
4708 oberon_error(ctx
, "requires type");
4711 oberon_expr_t
* arg
;
4712 arg
= list_args
-> next
;
4713 oberon_check_src(ctx
, arg
);
4715 oberon_expr_t
* expr
;
4716 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4720 static oberon_expr_t
*
4721 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4725 oberon_error(ctx
, "too few arguments");
4730 oberon_error(ctx
, "too mach arguments");
4735 oberon_check_src(ctx
, v
);
4737 if(!oberon_is_array_type(v
-> result
))
4739 oberon_error(ctx
, "expected array");
4745 oberon_expr_t
* num
;
4746 num
= list_args
-> next
;
4747 oberon_check_src(ctx
, num
);
4749 if(!oberon_is_integer_type(num
-> result
))
4751 oberon_error(ctx
, "expected integer");
4753 oberon_check_const(ctx
, num
);
4755 n
= num
-> item
.integer
;
4759 oberon_type_t
* arr
= v
-> result
;
4760 while(arr
-> class == OBERON_TYPE_ARRAY
)
4766 if(n
< 0 || n
> dim
)
4768 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4771 assert(v
-> is_item
);
4773 oberon_expr_t
* expr
;
4774 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4775 expr
-> item
.parent
= (oberon_item_t
*) v
;
4776 expr
-> item
.integer
= n
;
4781 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4783 oberon_object_t
* constant
;
4784 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4785 oberon_check_const(ctx
, expr
);
4786 constant
-> value
= (oberon_item_t
*) expr
;
4790 register_default_types(oberon_context_t
* ctx
)
4792 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4793 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4795 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4796 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4798 ctx
-> string_type
= oberon_new_type_string(1);
4799 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4801 ctx
-> bool_type
= oberon_new_type_boolean();
4802 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4804 ctx
-> char_type
= oberon_new_type_char(1);
4805 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4807 ctx
-> byte_type
= oberon_new_type_integer(1);
4808 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4810 ctx
-> shortint_type
= oberon_new_type_integer(2);
4811 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4813 ctx
-> int_type
= oberon_new_type_integer(4);
4814 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4816 ctx
-> longint_type
= oberon_new_type_integer(8);
4817 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4819 ctx
-> real_type
= oberon_new_type_real(4);
4820 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4822 ctx
-> longreal_type
= oberon_new_type_real(8);
4823 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4825 ctx
-> set_type
= oberon_new_type_set(4);
4826 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4828 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4829 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4831 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4832 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4834 /* LONG / SHORT support */
4835 ctx
-> byte_type
-> shorter
= NULL
;
4836 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4838 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4839 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4841 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4842 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4844 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4845 ctx
-> longint_type
-> longer
= NULL
;
4847 ctx
-> real_type
-> shorter
= NULL
;
4848 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4850 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4851 ctx
-> longreal_type
-> longer
= NULL
;
4855 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4857 oberon_object_t
* proc
;
4858 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4859 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4860 proc
-> type
-> sysproc
= true;
4861 proc
-> type
-> genfunc
= f
;
4862 proc
-> type
-> genproc
= p
;
4865 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4867 oberon_object_t
* id
;
4868 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4873 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4875 oberon_scope_t
* module_scope
;
4876 module_scope
= oberon_open_scope(ctx
);
4878 oberon_module_t
* module
;
4879 module
= GC_MALLOC(sizeof *module
);
4880 memset(module
, 0, sizeof *module
);
4881 module
-> name
= name
;
4882 module
-> intrinsic
= true;
4883 module
-> decl
= module_scope
;
4884 module
-> next
= ctx
-> module_list
;
4886 ctx
-> mod
= module
;
4887 ctx
-> module_list
= module
;
4893 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4895 oberon_close_scope(m
-> decl
);
4901 oberon_create_context(ModuleImportCallback import_module
)
4903 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4904 memset(ctx
, 0, sizeof *ctx
);
4906 oberon_scope_t
* world_scope
;
4907 world_scope
= oberon_open_scope(ctx
);
4908 ctx
-> world_scope
= world_scope
;
4910 ctx
-> import_module
= import_module
;
4912 oberon_generator_init_context(ctx
);
4915 register_default_types(ctx
);
4918 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4919 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4922 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4923 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4924 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4925 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4926 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4927 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4928 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4929 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4930 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4933 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4934 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4935 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4936 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4937 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4938 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4939 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4940 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4941 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4942 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4943 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4944 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4945 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4948 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4949 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4950 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4951 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4952 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4953 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4954 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4955 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4958 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4961 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4962 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4963 oberon_new_intrinsic_type(ctx
, "INT32", ctx
-> int_type
);
4964 oberon_new_intrinsic_type(ctx
, "SET32", ctx
-> set_type
);
4967 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4968 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4969 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4970 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4972 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4978 oberon_destroy_context(oberon_context_t
* ctx
)
4980 oberon_generator_destroy_context(ctx
);
4984 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
4986 const char * code
= ctx
-> code
;
4987 int code_index
= ctx
-> code_index
;
4988 oberon_location_t loc
= ctx
-> loc
;
4989 oberon_location_t xloc
= ctx
-> xloc
;
4991 int token
= ctx
-> token
;
4992 char * string
= ctx
-> string
;
4993 int integer
= ctx
-> integer
;
4994 int real
= ctx
-> real
;
4995 bool longmode
= ctx
-> longmode
;
4996 oberon_scope_t
* decl
= ctx
-> decl
;
4997 oberon_module_t
* mod
= ctx
-> mod
;
4999 oberon_scope_t
* module_scope
;
5000 module_scope
= oberon_open_scope(ctx
);
5002 oberon_module_t
* module
;
5003 module
= GC_MALLOC(sizeof *module
);
5004 memset(module
, 0, sizeof *module
);
5005 module
-> decl
= module_scope
;
5006 module
-> next
= ctx
-> module_list
;
5008 ctx
-> mod
= module
;
5009 ctx
-> module_list
= module
;
5011 oberon_init_scaner(ctx
, s
);
5012 oberon_parse_module(ctx
);
5014 module
-> ready
= 1;
5017 ctx
-> code_index
= code_index
;
5021 ctx
-> token
= token
;
5022 ctx
-> string
= string
;
5023 ctx
-> integer
= integer
;
5025 ctx
-> longmode
= longmode
;