4afd4c27825aa3eccf0f95c0d62e40c010e3366d
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_skip_space(oberon_context_t
* ctx
)
698 while(isspace(ctx
-> c
))
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
);
724 oberon_read_comment(oberon_context_t
* ctx
)
731 oberon_get_char(ctx
);
734 oberon_get_char(ctx
);
738 else if(ctx
-> c
== '*')
740 oberon_get_char(ctx
);
743 oberon_get_char(ctx
);
747 else if(ctx
-> c
== 0)
749 oberon_error(ctx
, "unterminated comment");
753 oberon_get_char(ctx
);
758 static void oberon_read_string(oberon_context_t
* ctx
)
761 oberon_get_char(ctx
);
763 int start
= ctx
-> code_index
;
765 while(ctx
-> c
!= 0 && ctx
-> c
!= c
)
767 oberon_get_char(ctx
);
772 oberon_error(ctx
, "unterminated string");
775 int end
= ctx
-> code_index
;
777 oberon_get_char(ctx
);
779 char * string
= GC_MALLOC(end
- start
+ 1);
780 strncpy(string
, &ctx
-> code
[start
], end
- start
);
781 string
[end
- start
] = 0;
783 ctx
-> token
= STRING
;
784 ctx
-> string
= string
;
785 ctx
-> integer
= string
[0];
788 static void oberon_read_token(oberon_context_t
* ctx
);
791 oberon_read_symbol(oberon_context_t
* ctx
)
800 ctx
-> token
= SEMICOLON
;
801 oberon_get_char(ctx
);
804 ctx
-> token
= COLON
;
805 oberon_get_char(ctx
);
808 ctx
-> token
= ASSIGN
;
809 oberon_get_char(ctx
);
814 oberon_get_char(ctx
);
817 ctx
-> token
= DOTDOT
;
818 oberon_get_char(ctx
);
822 ctx
-> token
= LPAREN
;
823 oberon_get_char(ctx
);
826 oberon_get_char(ctx
);
827 oberon_read_comment(ctx
);
828 oberon_read_token(ctx
);
832 ctx
-> token
= RPAREN
;
833 oberon_get_char(ctx
);
836 ctx
-> token
= EQUAL
;
837 oberon_get_char(ctx
);
841 oberon_get_char(ctx
);
845 oberon_get_char(ctx
);
849 oberon_get_char(ctx
);
853 ctx
-> token
= GREAT
;
854 oberon_get_char(ctx
);
858 oberon_get_char(ctx
);
863 oberon_get_char(ctx
);
866 ctx
-> token
= MINUS
;
867 oberon_get_char(ctx
);
871 oberon_get_char(ctx
);
874 oberon_get_char(ctx
);
875 oberon_error(ctx
, "unstarted comment");
879 ctx
-> token
= SLASH
;
880 oberon_get_char(ctx
);
884 oberon_get_char(ctx
);
888 oberon_get_char(ctx
);
891 ctx
-> token
= COMMA
;
892 oberon_get_char(ctx
);
895 ctx
-> token
= LBRACK
;
896 oberon_get_char(ctx
);
899 ctx
-> token
= RBRACK
;
900 oberon_get_char(ctx
);
903 ctx
-> token
= UPARROW
;
904 oberon_get_char(ctx
);
907 oberon_read_string(ctx
);
910 oberon_read_string(ctx
);
913 ctx
-> token
= LBRACE
;
914 oberon_get_char(ctx
);
917 ctx
-> token
= RBRACE
;
918 oberon_get_char(ctx
);
922 oberon_get_char(ctx
);
925 oberon_error(ctx
, "invalid char %c", ctx
-> c
);
931 oberon_read_token(oberon_context_t
* ctx
)
933 oberon_skip_space(ctx
);
935 ctx
-> loc
= ctx
-> xloc
;
938 if(isalpha(c
) || c
== '_')
940 oberon_read_ident(ctx
);
944 oberon_read_number(ctx
);
948 oberon_read_symbol(ctx
);
952 // =======================================================================
954 // =======================================================================
956 static void oberon_expect_token(oberon_context_t
* ctx
, int token
);
957 static oberon_expr_t
* oberon_expr(oberon_context_t
* ctx
);
958 static void oberon_assert_token(oberon_context_t
* ctx
, int token
);
959 static char * oberon_assert_ident(oberon_context_t
* ctx
);
960 static void oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
);
961 static oberon_item_t
* oberon_const_expr(oberon_context_t
* ctx
);
962 static oberon_expr_t
* oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
);
963 static bool oberon_is_const(oberon_expr_t
* expr
);
965 static oberon_expr_t
*
966 oberon_make_unary_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
)
968 oberon_expr_t
* expr
;
969 oberon_type_t
* result
;
971 result
= a
-> result
;
975 if(result
-> class == OBERON_TYPE_SET
)
977 if(oberon_is_const(a
))
979 expr
= oberon_make_set(ctx
, ~(a
-> item
.integer
));
983 expr
= oberon_new_operator(OP_COMPLEMENTATION
, result
, a
, NULL
);
986 else if(result
-> class == OBERON_TYPE_INTEGER
)
988 if(oberon_is_const(a
))
990 expr
= oberon_make_integer(ctx
, -(a
-> item
.integer
));
994 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
997 else if(result
-> class == OBERON_TYPE_REAL
)
999 if(oberon_is_const(a
))
1001 expr
= oberon_make_real_typed(ctx
, -(a
-> item
.real
), result
);
1005 expr
= oberon_new_operator(OP_UNARY_MINUS
, result
, a
, NULL
);
1010 oberon_error(ctx
, "incompatible operator type");
1013 else if(token
== NOT
)
1015 if(result
-> class != OBERON_TYPE_BOOLEAN
)
1017 oberon_error(ctx
, "incompatible operator type");
1020 if(oberon_is_const(a
))
1022 expr
= oberon_make_boolean(ctx
, !(a
-> item
.integer
));
1026 expr
= oberon_new_operator(OP_LOGIC_NOT
, result
, a
, NULL
);
1031 oberon_error(ctx
, "oberon_make_unary_op: wat");
1038 oberon_expr_list(oberon_context_t
* ctx
, int * num_expr
, oberon_expr_t
** first
, int const_expr
)
1040 oberon_expr_t
* last
;
1045 *first
= last
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1049 *first
= last
= oberon_expr(ctx
);
1051 while(ctx
-> token
== COMMA
)
1053 oberon_assert_token(ctx
, COMMA
);
1054 oberon_expr_t
* current
;
1058 current
= (oberon_expr_t
*) oberon_const_expr(ctx
);
1062 current
= oberon_expr(ctx
);
1065 last
-> next
= current
;
1071 static oberon_expr_t
*
1072 oberon_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1074 oberon_expr_t
* cast
;
1076 if((oberon_is_char_type(pref
) && oberon_is_const_string(expr
) && strlen(expr
-> item
.string
) == 1))
1078 /* Автоматически преобразуем строку единичного размера в символ */
1079 cast
= oberon_new_item(MODE_CHAR
, ctx
-> char_type
, true);
1080 cast
-> item
.integer
= expr
-> item
.string
[0];
1082 else if(!oberon_is_some_types(expr
-> result
, pref
))
1084 cast
= oberon_new_operator(OP_CAST
, pref
, expr
, NULL
);
1094 static oberon_expr_t
*
1095 oberon_hard_cast_expr(oberon_context_t
* ctx
, oberon_expr_t
* expr
, oberon_type_t
* pref
)
1097 return oberon_new_operator(OP_HARDCAST
, pref
, expr
, NULL
);
1101 oberon_check_dst(oberon_context_t
* ctx
, oberon_expr_t
* dst
)
1103 if(dst
-> read_only
)
1105 oberon_error(ctx
, "read-only destination");
1108 if(dst
-> is_item
== false)
1110 oberon_error(ctx
, "not variable");
1113 switch(dst
-> item
.mode
)
1124 oberon_error(ctx
, "not variable");
1130 oberon_check_src(oberon_context_t
* ctx
, oberon_expr_t
* src
)
1134 if(src
-> item
.mode
== MODE_TYPE
)
1136 oberon_error(ctx
, "not variable");
1142 oberon_autocast_call(oberon_context_t
* ctx
, oberon_item_t
* desig
)
1144 if(desig
-> mode
!= MODE_CALL
)
1146 oberon_error(ctx
, "expected mode CALL");
1149 oberon_type_t
* fn
= desig
-> parent
-> result
;
1150 int num_args
= desig
-> num_args
;
1151 int num_decl
= fn
-> num_decl
;
1153 printf("oberon_autocast_call: num_args %i num_decl %i\n", num_args
, num_decl
);
1155 if(num_args
< num_decl
)
1157 oberon_error(ctx
, "too few arguments");
1159 else if(num_args
> num_decl
)
1161 oberon_error(ctx
, "too many arguments");
1164 /* Делаем проверку на запись и делаем автокаст */
1165 oberon_expr_t
* casted
[num_args
];
1166 oberon_expr_t
* arg
= desig
-> args
;
1167 oberon_object_t
* param
= fn
-> decl
;
1168 for(int i
= 0; i
< num_args
; i
++)
1170 if(param
-> class == OBERON_CLASS_VAR_PARAM
)
1172 oberon_check_dst(ctx
, arg
);
1173 if(!oberon_is_compatible_arrays(param
, arg
))
1175 oberon_check_compatible_var_param(ctx
, param
-> type
, arg
-> result
);
1178 //casted[i] = oberon_cast_expr(ctx, arg, param -> type);
1182 oberon_check_src(ctx
, arg
);
1183 if(!oberon_is_compatible_arrays(param
, arg
))
1185 oberon_check_assignment_compatible(ctx
, arg
, param
-> type
);
1187 casted
[i
] = oberon_cast_expr(ctx
, arg
, param
-> type
);
1191 param
= param
-> next
;
1194 /* Создаём новый список выражений */
1198 for(int i
= 0; i
< num_args
- 1; i
++)
1200 casted
[i
] -> next
= casted
[i
+ 1];
1202 desig
-> args
= arg
;
1206 static oberon_expr_t
*
1207 oberon_make_call_func(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1209 oberon_type_t
* signature
= item
-> result
;
1210 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1212 oberon_error(ctx
, "not a procedure");
1215 oberon_expr_t
* call
;
1217 if(signature
-> sysproc
)
1219 if(signature
-> genfunc
== NULL
)
1221 oberon_error(ctx
, "not a function-procedure");
1224 call
= signature
-> genfunc(ctx
, num_args
, list_args
);
1228 if(signature
-> base
-> class == OBERON_TYPE_NOTYPE
)
1230 oberon_error(ctx
, "attempt to call procedure in expression");
1233 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1234 call
-> item
.parent
= item
;
1235 call
-> item
.num_args
= num_args
;
1236 call
-> item
.args
= list_args
;
1237 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1244 oberon_make_call_proc(oberon_context_t
* ctx
, oberon_item_t
* item
, int num_args
, oberon_expr_t
* list_args
)
1246 oberon_type_t
* signature
= item
-> result
;
1247 if(signature
-> class != OBERON_TYPE_PROCEDURE
)
1249 oberon_error(ctx
, "not a procedure");
1252 oberon_expr_t
* call
;
1254 if(signature
-> sysproc
)
1256 if(signature
-> genproc
== NULL
)
1258 oberon_error(ctx
, "not a procedure");
1261 signature
-> genproc(ctx
, num_args
, list_args
);
1265 if(signature
-> base
-> class != OBERON_TYPE_NOTYPE
)
1267 oberon_error(ctx
, "attempt to call function as non-typed procedure");
1270 call
= oberon_new_item(MODE_CALL
, signature
-> base
, true);
1271 call
-> item
.parent
= item
;
1272 call
-> item
.num_args
= num_args
;
1273 call
-> item
.args
= list_args
;
1274 oberon_autocast_call(ctx
, (oberon_item_t
*) call
);
1275 oberon_generate_call_proc(ctx
, call
);
1283 || ((x) == INTEGER) \
1286 || ((x) == STRING) \
1288 || ((x) == LPAREN) \
1291 static oberon_expr_t
*
1292 oberno_make_dereferencing(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1294 if(expr
-> result
-> class != OBERON_TYPE_POINTER
)
1296 oberon_error(ctx
, "not a pointer");
1299 assert(expr
-> is_item
);
1301 oberon_expr_t
* selector
;
1302 selector
= oberon_new_item(MODE_DEREF
, expr
-> result
-> base
, false);
1303 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1308 static oberon_expr_t
*
1309 oberon_make_array_selector(oberon_context_t
* ctx
, oberon_expr_t
* desig
, oberon_expr_t
* index
)
1311 if(desig
-> result
-> class == OBERON_TYPE_POINTER
)
1313 desig
= oberno_make_dereferencing(ctx
, desig
);
1316 assert(desig
-> is_item
);
1318 if(desig
-> result
-> class != OBERON_TYPE_ARRAY
)
1320 oberon_error(ctx
, "not array");
1323 oberon_type_t
* base
;
1324 base
= desig
-> result
-> base
;
1326 if(index
-> result
-> class != OBERON_TYPE_INTEGER
)
1328 oberon_error(ctx
, "index must be integer");
1331 // Статическая проверка границ массива
1332 if(desig
-> result
-> size
!= 0)
1334 if(index
-> is_item
)
1336 if(index
-> item
.mode
== MODE_INTEGER
)
1338 int arr_size
= desig
-> result
-> size
;
1339 int index_int
= index
-> item
.integer
;
1340 if(index_int
< 0 || index_int
> arr_size
- 1)
1342 oberon_error(ctx
, "not in range (dimension size 0..%i)", arr_size
- 1);
1348 oberon_expr_t
* selector
;
1349 selector
= oberon_new_item(MODE_INDEX
, base
, desig
-> read_only
);
1350 selector
-> item
.parent
= (oberon_item_t
*) desig
;
1351 selector
-> item
.num_args
= 1;
1352 selector
-> item
.args
= index
;
1357 static oberon_expr_t
*
1358 oberon_make_record_selector(oberon_context_t
* ctx
, oberon_expr_t
* expr
, char * name
)
1360 if(expr
-> result
-> class == OBERON_TYPE_POINTER
)
1362 expr
= oberno_make_dereferencing(ctx
, expr
);
1365 assert(expr
-> is_item
);
1367 if(expr
-> result
-> class != OBERON_TYPE_RECORD
)
1369 oberon_error(ctx
, "not record");
1372 oberon_type_t
* rec
= expr
-> result
;
1374 oberon_object_t
* field
;
1375 field
= oberon_find_object(rec
-> scope
, name
, true);
1377 if(field
-> export
== 0)
1379 if(field
-> module
!= ctx
-> mod
)
1381 oberon_error(ctx
, "field not exported");
1385 int read_only
= expr
-> read_only
;
1386 if(field
-> read_only
)
1388 if(field
-> module
!= ctx
-> mod
)
1394 oberon_expr_t
* selector
;
1395 selector
= oberon_new_item(MODE_FIELD
, field
-> type
, read_only
);
1396 selector
-> item
.var
= field
;
1397 selector
-> item
.parent
= (oberon_item_t
*) expr
;
1402 #define ISSELECTOR(x) \
1405 || ((x) == UPARROW) \
1408 static oberon_object_t
*
1409 oberon_qualident(oberon_context_t
* ctx
, char ** xname
, int check
)
1412 oberon_object_t
* x
;
1414 name
= oberon_assert_ident(ctx
);
1415 x
= oberon_find_object(ctx
-> decl
, name
, check
);
1419 if(x
-> class == OBERON_CLASS_MODULE
)
1421 oberon_assert_token(ctx
, DOT
);
1422 name
= oberon_assert_ident(ctx
);
1423 /* Наличие объектов в левых модулях всегда проверяется */
1424 x
= oberon_find_object(x
-> module
-> decl
, name
, 1);
1426 if(x
-> export
== 0)
1428 oberon_error(ctx
, "not exported");
1441 static oberon_expr_t
*
1442 oberon_ident_item(oberon_context_t
* ctx
, char * name
)
1445 oberon_object_t
* x
;
1446 oberon_expr_t
* expr
;
1448 x
= oberon_find_object(ctx
-> decl
, name
, true);
1451 if(x
-> class == OBERON_CLASS_CONST
|| x
-> class == OBERON_CLASS_PROC
)
1456 expr
= oberon_new_item(MODE_VAR
, x
-> type
, read_only
);
1457 expr
-> item
.var
= x
;
1461 static oberon_expr_t
*
1462 oberon_qualident_expr(oberon_context_t
* ctx
)
1464 oberon_object_t
* var
;
1465 oberon_expr_t
* expr
;
1467 var
= oberon_qualident(ctx
, NULL
, 1);
1470 if(var
-> read_only
)
1472 if(var
-> module
!= ctx
-> mod
)
1478 switch(var
-> class)
1480 case OBERON_CLASS_CONST
:
1482 expr
= (oberon_expr_t
*) var
-> value
;
1484 case OBERON_CLASS_TYPE
:
1485 expr
= oberon_new_item(MODE_TYPE
, var
-> type
, read_only
);
1487 case OBERON_CLASS_VAR
:
1488 case OBERON_CLASS_VAR_PARAM
:
1489 case OBERON_CLASS_PARAM
:
1490 expr
= oberon_new_item(MODE_VAR
, var
-> type
, read_only
);
1492 case OBERON_CLASS_PROC
:
1493 expr
= oberon_new_item(MODE_VAR
, var
-> type
, true);
1496 oberon_error(ctx
, "invalid designator");
1500 expr
-> item
.var
= var
;
1505 static oberon_expr_t
*
1506 oberon_designator(oberon_context_t
* ctx
)
1509 oberon_expr_t
* expr
;
1510 oberon_object_t
* objtype
;
1512 expr
= oberon_qualident_expr(ctx
);
1514 while(expr
-> result
-> class != OBERON_TYPE_PROCEDURE
&& ISSELECTOR(ctx
-> token
))
1516 switch(ctx
-> token
)
1519 oberon_assert_token(ctx
, DOT
);
1520 name
= oberon_assert_ident(ctx
);
1521 expr
= oberon_make_record_selector(ctx
, expr
, name
);
1524 oberon_assert_token(ctx
, LBRACK
);
1525 int num_indexes
= 0;
1526 oberon_expr_t
* indexes
= NULL
;
1527 oberon_expr_list(ctx
, &num_indexes
, &indexes
, 0);
1528 oberon_assert_token(ctx
, RBRACK
);
1530 for(int i
= 0; i
< num_indexes
; i
++)
1532 expr
= oberon_make_array_selector(ctx
, expr
, indexes
);
1533 indexes
= indexes
-> next
;
1537 oberon_assert_token(ctx
, UPARROW
);
1538 expr
= oberno_make_dereferencing(ctx
, expr
);
1541 oberon_assert_token(ctx
, LPAREN
);
1542 objtype
= oberon_qualident(ctx
, NULL
, true);
1543 oberon_assert_token(ctx
, RPAREN
);
1544 oberon_check_extension_of(ctx
, expr
-> result
, objtype
-> type
);
1545 expr
= oberon_cast_expr(ctx
, expr
, objtype
-> type
);
1548 oberon_error(ctx
, "oberon_designator: wat");
1556 static oberon_expr_t
*
1557 oberon_opt_func_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1559 /* Если есть скобки - значит вызов. Если нет, то передаём указатель. */
1560 if(ctx
-> token
== LPAREN
)
1562 oberon_assert_token(ctx
, LPAREN
);
1565 oberon_expr_t
* arguments
= NULL
;
1567 if(ISEXPR(ctx
-> token
))
1569 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1572 assert(expr
-> is_item
== 1);
1573 expr
= oberon_make_call_func(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1575 oberon_assert_token(ctx
, RPAREN
);
1582 oberon_opt_proc_parens(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
1584 assert(expr
-> is_item
);
1587 oberon_expr_t
* arguments
= NULL
;
1589 if(ctx
-> token
== LPAREN
)
1591 oberon_assert_token(ctx
, LPAREN
);
1593 if(ISEXPR(ctx
-> token
))
1595 oberon_expr_list(ctx
, &num_args
, &arguments
, 0);
1598 oberon_assert_token(ctx
, RPAREN
);
1601 /* Вызов происходит даже без скобок */
1602 oberon_make_call_proc(ctx
, (oberon_item_t
*) expr
, num_args
, arguments
);
1605 static oberon_expr_t
*
1606 oberon_element(oberon_context_t
* ctx
)
1611 e1
= oberon_expr(ctx
);
1612 oberon_check_src(ctx
, e1
);
1613 if(e1
-> result
-> class != OBERON_TYPE_INTEGER
)
1615 oberon_error(ctx
, "expected integer");
1619 if(ctx
-> token
== DOTDOT
)
1621 oberon_assert_token(ctx
, DOTDOT
);
1622 e2
= oberon_expr(ctx
);
1623 oberon_check_src(ctx
, e2
);
1624 if(e2
-> result
-> class != OBERON_TYPE_INTEGER
)
1626 oberon_error(ctx
, "expected integer");
1630 oberon_expr_t
* set
;
1631 if(e2
== NULL
&& oberon_is_const(e1
))
1633 set
= oberon_make_set_index(ctx
, e1
-> item
.integer
);
1635 else if(e2
!= NULL
&& oberon_is_const(e1
) && oberon_is_const(e2
))
1637 set
= oberon_make_set_range(ctx
, e1
-> item
.integer
, e2
-> item
.integer
);
1641 set
= oberon_new_operator(OP_RANGE
, ctx
-> set_type
, e1
, e2
);
1646 static oberon_expr_t
*
1647 oberon_make_set_union(oberon_context_t
* ctx
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1649 if(oberon_is_const(a
) && oberon_is_const(b
))
1651 return oberon_make_set(ctx
, (a
-> item
.integer
| b
-> item
.integer
));
1655 return oberon_new_operator(OP_UNION
, ctx
-> set_type
, a
, b
);
1659 static oberon_expr_t
*
1660 oberon_set(oberon_context_t
* ctx
)
1662 oberon_expr_t
* set
;
1663 oberon_expr_t
* elements
;
1664 set
= oberon_make_set(ctx
, 0);
1666 oberon_assert_token(ctx
, LBRACE
);
1667 if(ISEXPR(ctx
-> token
))
1669 elements
= oberon_element(ctx
);
1670 set
= oberon_make_set_union(ctx
, set
, elements
);
1671 while(ctx
-> token
== COMMA
)
1673 oberon_assert_token(ctx
, COMMA
);
1674 elements
= oberon_element(ctx
);
1675 set
= oberon_make_set_union(ctx
, set
, elements
);
1678 oberon_assert_token(ctx
, RBRACE
);
1683 static oberon_expr_t
*
1684 oberon_factor(oberon_context_t
* ctx
)
1686 oberon_expr_t
* expr
;
1687 oberon_type_t
* result
;
1689 switch(ctx
-> token
)
1692 expr
= oberon_designator(ctx
);
1693 expr
= oberon_opt_func_parens(ctx
, expr
);
1696 expr
= oberon_make_integer(ctx
, ctx
-> integer
);
1697 oberon_assert_token(ctx
, INTEGER
);
1700 result
= ctx
-> char_type
;
1701 expr
= oberon_new_item(MODE_CHAR
, result
, true);
1702 expr
-> item
.integer
= ctx
-> integer
;
1703 oberon_assert_token(ctx
, CHAR
);
1706 expr
= oberon_make_string(ctx
, ctx
-> string
);
1707 oberon_assert_token(ctx
, STRING
);
1710 expr
= oberon_make_real(ctx
, ctx
-> real
, ctx
-> longmode
);
1711 oberon_assert_token(ctx
, REAL
);
1714 expr
= oberon_set(ctx
);
1717 oberon_assert_token(ctx
, LPAREN
);
1718 expr
= oberon_expr(ctx
);
1719 oberon_assert_token(ctx
, RPAREN
);
1722 oberon_assert_token(ctx
, NOT
);
1723 expr
= oberon_factor(ctx
);
1724 expr
= oberon_make_unary_op(ctx
, NOT
, expr
);
1727 oberon_assert_token(ctx
, NIL
);
1728 expr
= oberon_new_item(MODE_NIL
, ctx
-> nil_type
, true);
1731 oberon_error(ctx
, "invalid expression");
1737 static oberon_expr_t
*
1738 oberon_make_bin_op(oberon_context_t
* ctx
, int token
, oberon_expr_t
* a
, oberon_expr_t
* b
)
1740 oberon_expr_t
* expr
;
1741 oberon_type_t
* result
;
1743 oberon_check_compatible_bin_expr(ctx
, token
, a
, b
);
1744 oberon_check_src(ctx
, a
);
1747 oberon_check_src(ctx
, b
);
1752 if(oberon_is_const(a
) && oberon_is_const(b
))
1754 expr
= oberon_make_boolean(ctx
, (1 << a
-> item
.integer
) & b
-> item
.integer
);
1758 expr
= oberon_new_operator(OP_IN
, ctx
-> bool_type
, a
, b
);
1761 else if(token
== IS
)
1763 oberon_check_type_expr(ctx
, b
);
1764 expr
= oberon_new_operator(OP_IS
, ctx
-> bool_type
, a
, b
);
1766 else if((token
>= EQUAL
&& token
<= GEQ
) || token
== OR
|| token
== AND
)
1768 if(oberon_is_string_of_one(a
) && oberon_is_char_type(b
-> result
))
1770 result
= b
-> result
;
1772 else if(oberon_is_string_of_one(b
) && oberon_is_char_type(a
-> result
))
1774 result
= a
-> result
;
1776 else if(oberon_is_string_of_one(a
) && oberon_is_string_of_one(b
))
1778 result
= ctx
-> char_type
;
1782 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1785 if(oberon_is_const(a
) && oberon_is_const(b
)
1786 && (oberon_is_real_type(result
) || oberon_is_integer_type(result
)))
1788 if(oberon_is_real_type(result
))
1790 double x
= a
-> item
.real
;
1791 double y
= b
-> item
.real
;
1794 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1795 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1796 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1797 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1798 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1799 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1800 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1801 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1802 default: assert(0); break;
1805 else if(oberon_is_integer_type(result
))
1807 int64_t x
= a
-> item
.integer
;
1808 int64_t y
= b
-> item
.integer
;
1811 case EQUAL
: expr
= oberon_make_boolean(ctx
, x
== y
); break;
1812 case NEQ
: expr
= oberon_make_boolean(ctx
, x
!= y
); break;
1813 case LESS
: expr
= oberon_make_boolean(ctx
, x
< y
); break;
1814 case LEQ
: expr
= oberon_make_boolean(ctx
, x
<= y
); break;
1815 case GREAT
: expr
= oberon_make_boolean(ctx
, x
> y
); break;
1816 case GEQ
: expr
= oberon_make_boolean(ctx
, x
>= y
); break;
1817 case OR
: expr
= oberon_make_boolean(ctx
, x
|| y
); break;
1818 case AND
: expr
= oberon_make_boolean(ctx
, x
&& y
); break;
1819 default: assert(0); break;
1829 a
= oberon_cast_expr(ctx
, a
, result
);
1830 b
= oberon_cast_expr(ctx
, b
, result
);
1831 result
= ctx
-> bool_type
;
1834 case EQUAL
: expr
= oberon_new_operator(OP_EQ
, result
, a
, b
); break;
1835 case NEQ
: expr
= oberon_new_operator(OP_NEQ
, result
, a
, b
); break;
1836 case LESS
: expr
= oberon_new_operator(OP_LSS
, result
, a
, b
); break;
1837 case LEQ
: expr
= oberon_new_operator(OP_LEQ
, result
, a
, b
); break;
1838 case GREAT
: expr
= oberon_new_operator(OP_GRT
, result
, a
, b
); break;
1839 case GEQ
: expr
= oberon_new_operator(OP_GEQ
, result
, a
, b
); break;
1840 case OR
: expr
= oberon_new_operator(OP_LOGIC_OR
, result
, a
, b
); break;
1841 case AND
: expr
= oberon_new_operator(OP_LOGIC_AND
, result
, a
, b
); break;
1842 default: assert(0); break;
1846 else if(token
== SLASH
)
1848 if(oberon_is_set_type(a
-> result
) && oberon_is_set_type(b
-> result
))
1850 if(oberon_is_const(a
) && oberon_is_const(b
))
1852 int64_t x
= a
-> item
.integer
;
1853 int64_t y
= b
-> item
.integer
;
1854 expr
= oberon_make_set(ctx
, x
^ y
);
1858 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1859 a
= oberon_cast_expr(ctx
, a
, result
);
1860 b
= oberon_cast_expr(ctx
, b
, result
);
1861 expr
= oberon_new_operator(OP_SYM_DIFFERENCE
, result
, a
, b
);
1866 result
= oberon_get_longer_real_type(ctx
, a
-> result
, b
-> result
);
1867 if(oberon_is_const(a
) && oberon_is_const(b
))
1869 double x
= a
-> item
.real
;
1870 double y
= b
-> item
.real
;
1871 expr
= oberon_make_real_typed(ctx
, x
/ y
, result
);
1875 a
= oberon_cast_expr(ctx
, a
, result
);
1876 b
= oberon_cast_expr(ctx
, b
, result
);
1877 expr
= oberon_new_operator(OP_DIV
, result
, a
, b
);
1883 result
= oberon_get_longer_type(ctx
, a
-> result
, b
-> result
);
1885 if(oberon_is_const(a
) && oberon_is_const(b
))
1887 if(oberon_is_set_type(result
))
1889 int64_t x
= a
-> item
.integer
;
1890 int64_t y
= b
-> item
.integer
;
1893 case PLUS
: expr
= oberon_make_set(ctx
, x
| y
); break;
1894 case MINUS
: expr
= oberon_make_set(ctx
, x
& ~y
); break;
1895 case STAR
: expr
= oberon_make_set(ctx
, x
& y
); break;
1896 default: assert(0); break;
1899 if(oberon_is_real_type(result
))
1901 double x
= a
-> item
.real
;
1902 double y
= b
-> item
.real
;
1905 case PLUS
: expr
= oberon_make_real_typed(ctx
, x
+ y
, result
); break;
1906 case MINUS
: expr
= oberon_make_real_typed(ctx
, x
- y
, result
); break;
1907 case STAR
: expr
= oberon_make_real_typed(ctx
, x
* y
, result
); break;
1908 default: assert(0); break;
1911 else if(oberon_is_integer_type(result
))
1913 int64_t x
= a
-> item
.integer
;
1914 int64_t y
= b
-> item
.integer
;
1917 case PLUS
: expr
= oberon_make_integer(ctx
, x
+ y
); break;
1918 case MINUS
: expr
= oberon_make_integer(ctx
, x
- y
); break;
1919 case STAR
: expr
= oberon_make_integer(ctx
, x
* y
); break;
1920 case DIV
: expr
= oberon_make_integer(ctx
, x
/ y
); break;
1921 case MOD
: expr
= oberon_make_integer(ctx
, x
% y
); break;
1922 default: assert(0); break;
1932 a
= oberon_cast_expr(ctx
, a
, result
);
1933 b
= oberon_cast_expr(ctx
, b
, result
);
1936 if(oberon_is_set_type(result
))
1941 expr
= oberon_new_operator(OP_UNION
, result
, a
, b
);
1944 expr
= oberon_new_operator(OP_DIFFERENCE
, result
, a
, b
);
1947 expr
= oberon_new_operator(OP_INTERSECTION
, result
, a
, b
);
1954 else if(oberon_is_number_type(result
))
1959 expr
= oberon_new_operator(OP_ADD
, result
, a
, b
);
1962 expr
= oberon_new_operator(OP_SUB
, result
, a
, b
);
1965 expr
= oberon_new_operator(OP_MUL
, result
, a
, b
);
1982 #define ISMULOP(x) \
1983 ((x) >= STAR && (x) <= AND)
1985 static oberon_expr_t
*
1986 oberon_term_expr(oberon_context_t
* ctx
)
1988 oberon_expr_t
* expr
;
1990 expr
= oberon_factor(ctx
);
1991 while(ISMULOP(ctx
-> token
))
1993 int token
= ctx
-> token
;
1994 oberon_read_token(ctx
);
1996 oberon_expr_t
* inter
= oberon_factor(ctx
);
1997 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2003 #define ISADDOP(x) \
2004 ((x) >= PLUS && (x) <= OR)
2006 static oberon_expr_t
*
2007 oberon_simple_expr(oberon_context_t
* ctx
)
2009 oberon_expr_t
* expr
;
2012 if(ctx
-> token
== PLUS
)
2015 oberon_assert_token(ctx
, PLUS
);
2017 else if(ctx
-> token
== MINUS
)
2020 oberon_assert_token(ctx
, MINUS
);
2023 expr
= oberon_term_expr(ctx
);
2025 while(ISADDOP(ctx
-> token
))
2027 int token
= ctx
-> token
;
2028 oberon_read_token(ctx
);
2030 oberon_expr_t
* inter
= oberon_term_expr(ctx
);
2031 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2036 expr
= oberon_make_unary_op(ctx
, MINUS
, expr
);
2042 #define ISRELATION(x) \
2043 ((x) >= EQUAL && (x) <= IS)
2045 static oberon_expr_t
*
2046 oberon_expr(oberon_context_t
* ctx
)
2048 oberon_expr_t
* expr
;
2050 expr
= oberon_simple_expr(ctx
);
2051 while(ISRELATION(ctx
-> token
))
2053 int token
= ctx
-> token
;
2054 oberon_read_token(ctx
);
2056 oberon_expr_t
* inter
= oberon_simple_expr(ctx
);
2057 expr
= oberon_make_bin_op(ctx
, token
, expr
, inter
);
2064 oberon_is_const(oberon_expr_t
* expr
)
2066 if(expr
-> is_item
== false)
2071 switch(expr
-> item
.mode
)
2093 oberon_check_const(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2095 if(!oberon_is_const(expr
))
2097 oberon_error(ctx
, "const expression are required");
2101 static oberon_item_t
*
2102 oberon_const_expr(oberon_context_t
* ctx
)
2104 oberon_expr_t
* expr
;
2105 expr
= oberon_expr(ctx
);
2106 oberon_check_const(ctx
, expr
);
2107 return (oberon_item_t
*) expr
;
2110 // =======================================================================
2112 // =======================================================================
2114 static void oberon_decl_seq(oberon_context_t
* ctx
);
2115 static void oberon_statement_seq(oberon_context_t
* ctx
);
2116 static void oberon_initialize_decl(oberon_context_t
* ctx
);
2119 oberon_expect_token(oberon_context_t
* ctx
, int token
)
2121 if(ctx
-> token
!= token
)
2123 oberon_error(ctx
, "unexpected token %i (%i)", ctx
-> token
, token
);
2128 oberon_assert_token(oberon_context_t
* ctx
, int token
)
2130 oberon_expect_token(ctx
, token
);
2131 oberon_read_token(ctx
);
2135 oberon_assert_ident(oberon_context_t
* ctx
)
2137 oberon_expect_token(ctx
, IDENT
);
2138 char * ident
= ctx
-> string
;
2139 oberon_read_token(ctx
);
2144 oberon_def(oberon_context_t
* ctx
, int * export
, int * read_only
)
2146 switch(ctx
-> token
)
2149 oberon_assert_token(ctx
, STAR
);
2154 oberon_assert_token(ctx
, MINUS
);
2165 static oberon_object_t
*
2166 oberon_ident_def(oberon_context_t
* ctx
, int class, bool check_upscope
)
2171 oberon_object_t
* x
;
2173 name
= oberon_assert_ident(ctx
);
2174 oberon_def(ctx
, &export
, &read_only
);
2176 x
= oberon_define_object(ctx
-> decl
, name
, class, export
, read_only
, check_upscope
);
2181 oberon_ident_list(oberon_context_t
* ctx
, int class, bool check_upscope
, int * num
, oberon_object_t
** list
)
2184 *list
= oberon_ident_def(ctx
, class, check_upscope
);
2185 while(ctx
-> token
== COMMA
)
2187 oberon_assert_token(ctx
, COMMA
);
2188 oberon_ident_def(ctx
, class, check_upscope
);
2194 oberon_var_decl(oberon_context_t
* ctx
)
2197 oberon_object_t
* list
;
2198 oberon_type_t
* type
;
2199 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2201 oberon_ident_list(ctx
, OBERON_CLASS_VAR
, false, &num
, &list
);
2202 oberon_assert_token(ctx
, COLON
);
2203 oberon_type(ctx
, &type
);
2205 oberon_object_t
* var
= list
;
2206 for(int i
= 0; i
< num
; i
++)
2213 static oberon_object_t
*
2214 oberon_fp_section(oberon_context_t
* ctx
, int * num_decl
)
2216 int class = OBERON_CLASS_PARAM
;
2217 if(ctx
-> token
== VAR
)
2219 oberon_read_token(ctx
);
2220 class = OBERON_CLASS_VAR_PARAM
;
2224 oberon_object_t
* list
;
2225 oberon_ident_list(ctx
, class, false, &num
, &list
);
2227 oberon_assert_token(ctx
, COLON
);
2229 oberon_type_t
* type
;
2230 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2231 oberon_type(ctx
, &type
);
2233 oberon_object_t
* param
= list
;
2234 for(int i
= 0; i
< num
; i
++)
2236 param
-> type
= type
;
2237 param
= param
-> next
;
2244 #define ISFPSECTION \
2245 ((ctx -> token == VAR) || (ctx -> token == IDENT))
2248 oberon_formal_pars(oberon_context_t
* ctx
, oberon_type_t
* signature
)
2250 oberon_assert_token(ctx
, LPAREN
);
2254 signature
-> decl
= oberon_fp_section(ctx
, &signature
-> num_decl
);
2255 while(ctx
-> token
== SEMICOLON
)
2257 oberon_assert_token(ctx
, SEMICOLON
);
2258 oberon_fp_section(ctx
, &signature
-> num_decl
);
2262 oberon_assert_token(ctx
, RPAREN
);
2264 if(ctx
-> token
== COLON
)
2266 oberon_assert_token(ctx
, COLON
);
2268 oberon_object_t
* typeobj
;
2269 typeobj
= oberon_qualident(ctx
, NULL
, 1);
2270 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2272 oberon_error(ctx
, "function result is not type");
2274 if(typeobj
-> type
-> class == OBERON_TYPE_RECORD
2275 || typeobj
-> type
-> class == OBERON_TYPE_ARRAY
)
2277 oberon_error(ctx
, "records or arrays could not be result of function");
2279 signature
-> base
= typeobj
-> type
;
2284 oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
)
2286 oberon_type_t
* signature
;
2288 signature
-> class = OBERON_TYPE_PROCEDURE
;
2289 signature
-> num_decl
= 0;
2290 signature
-> base
= ctx
-> notype_type
;
2291 signature
-> decl
= NULL
;
2293 if(ctx
-> token
== LPAREN
)
2295 oberon_formal_pars(ctx
, signature
);
2300 oberon_compare_signatures(oberon_context_t
* ctx
, oberon_type_t
* a
, oberon_type_t
* b
)
2302 if(a
-> num_decl
!= b
-> num_decl
)
2304 oberon_error(ctx
, "number parameters not matched");
2307 int num_param
= a
-> num_decl
;
2308 oberon_object_t
* param_a
= a
-> decl
;
2309 oberon_object_t
* param_b
= b
-> decl
;
2310 for(int i
= 0; i
< num_param
; i
++)
2312 if(strcmp(param_a
-> name
, param_b
-> name
) != 0)
2314 oberon_error(ctx
, "param %i name not matched", i
+ 1);
2317 if(param_a
-> type
!= param_b
-> type
)
2319 oberon_error(ctx
, "param %i type not matched", i
+ 1);
2322 param_a
= param_a
-> next
;
2323 param_b
= param_b
-> next
;
2328 oberon_make_return(oberon_context_t
* ctx
, oberon_expr_t
* expr
)
2330 oberon_object_t
* proc
= ctx
-> decl
-> parent
;
2331 oberon_type_t
* result_type
= proc
-> type
-> base
;
2333 if(result_type
-> class == OBERON_TYPE_NOTYPE
)
2337 oberon_error(ctx
, "procedure has no result type");
2344 oberon_error(ctx
, "procedure requires expression on result");
2347 oberon_check_src(ctx
, expr
);
2348 oberon_check_assignment_compatible(ctx
, expr
, result_type
);
2349 expr
= oberon_cast_expr(ctx
, expr
, result_type
);
2352 proc
-> has_return
= 1;
2354 oberon_generate_return(ctx
, expr
);
2358 oberon_proc_decl_body(oberon_context_t
* ctx
, oberon_object_t
* proc
)
2360 oberon_assert_token(ctx
, SEMICOLON
);
2362 ctx
-> decl
= proc
-> scope
;
2364 oberon_decl_seq(ctx
);
2366 oberon_generate_begin_proc(ctx
, proc
);
2368 if(ctx
-> token
== BEGIN
)
2370 oberon_assert_token(ctx
, BEGIN
);
2371 oberon_statement_seq(ctx
);
2374 oberon_assert_token(ctx
, END
);
2375 char * name
= oberon_assert_ident(ctx
);
2376 if(strcmp(name
, proc
-> name
) != 0)
2378 oberon_error(ctx
, "procedure name not matched");
2381 if(proc
-> type
-> base
-> class == OBERON_TYPE_NOTYPE
2382 && proc
-> has_return
== 0)
2384 oberon_make_return(ctx
, NULL
);
2387 if(proc
-> has_return
== 0)
2389 oberon_error(ctx
, "procedure requires return");
2392 oberon_generate_end_proc(ctx
);
2393 oberon_close_scope(ctx
-> decl
);
2397 oberon_proc_decl(oberon_context_t
* ctx
)
2399 oberon_assert_token(ctx
, PROCEDURE
);
2402 if(ctx
-> token
== UPARROW
)
2404 oberon_assert_token(ctx
, UPARROW
);
2411 name
= oberon_assert_ident(ctx
);
2412 oberon_def(ctx
, &export
, &read_only
);
2414 oberon_scope_t
* proc_scope
;
2415 proc_scope
= oberon_open_scope(ctx
);
2416 ctx
-> decl
-> local
= 1;
2418 oberon_type_t
* signature
;
2419 signature
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2420 oberon_opt_formal_pars(ctx
, &signature
);
2422 //oberon_initialize_decl(ctx);
2423 oberon_generator_init_type(ctx
, signature
);
2424 oberon_close_scope(ctx
-> decl
);
2426 oberon_object_t
* proc
;
2427 proc
= oberon_find_object(ctx
-> decl
, name
, 0);
2430 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, export
, read_only
, false);
2431 proc
-> type
= signature
;
2432 proc
-> scope
= proc_scope
;
2433 oberon_generator_init_proc(ctx
, proc
);
2437 if(proc
-> class != OBERON_CLASS_PROC
)
2439 oberon_error(ctx
, "mult definition");
2446 oberon_error(ctx
, "mult procedure definition");
2450 if(proc
-> export
!= export
|| proc
-> read_only
!= read_only
)
2452 oberon_error(ctx
, "export type not matched");
2455 oberon_compare_signatures(ctx
, proc
-> type
, signature
);
2458 proc_scope
-> parent
= proc
;
2459 oberon_object_t
* param
= proc_scope
-> list
-> next
;
2462 param
-> parent
= proc
;
2463 param
= param
-> next
;
2469 oberon_proc_decl_body(ctx
, proc
);
2474 oberon_const_decl(oberon_context_t
* ctx
)
2476 oberon_item_t
* value
;
2477 oberon_object_t
* constant
;
2479 constant
= oberon_ident_def(ctx
, OBERON_CLASS_CONST
, false);
2480 oberon_assert_token(ctx
, EQUAL
);
2481 value
= oberon_const_expr(ctx
);
2482 constant
-> value
= value
;
2486 oberon_make_array_type(oberon_context_t
* ctx
, oberon_expr_t
* size
, oberon_type_t
* base
, oberon_type_t
** type
)
2488 if(size
-> is_item
== 0)
2490 oberon_error(ctx
, "requires constant");
2493 if(size
-> item
.mode
!= MODE_INTEGER
)
2495 oberon_error(ctx
, "requires integer constant");
2498 oberon_type_t
* arr
;
2500 arr
-> class = OBERON_TYPE_ARRAY
;
2501 arr
-> size
= size
-> item
.integer
;
2506 oberon_qualident_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2509 oberon_object_t
* to
;
2511 to
= oberon_qualident(ctx
, &name
, 0);
2513 //name = oberon_assert_ident(ctx);
2514 //to = oberon_find_object(ctx -> decl, name, 0);
2518 if(to
-> class != OBERON_CLASS_TYPE
)
2520 oberon_error(ctx
, "not a type");
2525 to
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, false, false, false);
2526 to
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2532 static void oberon_opt_formal_pars(oberon_context_t
* ctx
, oberon_type_t
** type
);
2535 * Правило граматики "type". Указатель type должен указывать на существующий объект!
2539 oberon_make_multiarray(oberon_context_t
* ctx
, oberon_expr_t
* sizes
, oberon_type_t
* base
, oberon_type_t
** type
)
2547 oberon_type_t
* dim
;
2548 dim
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2550 oberon_make_multiarray(ctx
, sizes
-> next
, base
, &dim
);
2552 oberon_make_array_type(ctx
, sizes
, dim
, type
);
2556 oberon_make_open_array(oberon_context_t
* ctx
, oberon_type_t
* base
, oberon_type_t
* type
)
2558 type
-> class = OBERON_TYPE_ARRAY
;
2560 type
-> base
= base
;
2564 oberon_field_list(oberon_context_t
* ctx
, oberon_type_t
* rec
, oberon_scope_t
* modscope
)
2566 if(ctx
-> token
== IDENT
)
2569 oberon_object_t
* list
;
2570 oberon_type_t
* type
;
2571 type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2573 oberon_ident_list(ctx
, OBERON_CLASS_FIELD
, true, &num
, &list
);
2574 oberon_assert_token(ctx
, COLON
);
2576 oberon_scope_t
* current
= ctx
-> decl
;
2577 ctx
-> decl
= modscope
;
2578 oberon_type(ctx
, &type
);
2579 ctx
-> decl
= current
;
2581 oberon_object_t
* field
= list
;
2582 for(int i
= 0; i
< num
; i
++)
2584 field
-> type
= type
;
2585 field
= field
-> next
;
2588 rec
-> num_decl
+= num
;
2593 oberon_type_record_body(oberon_context_t
* ctx
, oberon_type_t
* rec
)
2595 oberon_scope_t
* modscope
= ctx
-> mod
-> decl
;
2596 oberon_scope_t
* oldscope
= ctx
-> decl
;
2597 ctx
-> decl
= modscope
;
2599 if(ctx
-> token
== LPAREN
)
2601 oberon_assert_token(ctx
, LPAREN
);
2603 oberon_object_t
* typeobj
;
2604 typeobj
= oberon_qualident(ctx
, NULL
, true);
2606 if(typeobj
-> class != OBERON_CLASS_TYPE
)
2608 oberon_error(ctx
, "base must be type");
2611 oberon_type_t
* base
= typeobj
-> type
;
2612 if(base
-> class == OBERON_TYPE_POINTER
)
2614 base
= base
-> base
;
2617 if(base
-> class != OBERON_TYPE_RECORD
)
2619 oberon_error(ctx
, "base must be record type");
2623 ctx
-> decl
= base
-> scope
;
2625 oberon_assert_token(ctx
, RPAREN
);
2632 oberon_scope_t
* this_scope
;
2633 this_scope
= oberon_open_scope(ctx
);
2634 this_scope
-> local
= true;
2635 this_scope
-> parent
= NULL
;
2636 this_scope
-> parent_type
= rec
;
2638 oberon_field_list(ctx
, rec
, modscope
);
2639 while(ctx
-> token
== SEMICOLON
)
2641 oberon_assert_token(ctx
, SEMICOLON
);
2642 oberon_field_list(ctx
, rec
, modscope
);
2645 rec
-> scope
= this_scope
;
2646 rec
-> decl
= this_scope
-> list
-> next
;
2647 ctx
-> decl
= oldscope
;
2651 oberon_type(oberon_context_t
* ctx
, oberon_type_t
** type
)
2653 if(ctx
-> token
== IDENT
)
2655 oberon_qualident_type(ctx
, type
);
2657 else if(ctx
-> token
== ARRAY
)
2659 oberon_assert_token(ctx
, ARRAY
);
2662 oberon_expr_t
* sizes
;
2664 if(ISEXPR(ctx
-> token
))
2666 oberon_expr_list(ctx
, &num_sizes
, &sizes
, 1);
2669 oberon_assert_token(ctx
, OF
);
2671 oberon_type_t
* base
;
2672 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2673 oberon_type(ctx
, &base
);
2677 oberon_make_open_array(ctx
, base
, *type
);
2681 oberon_make_multiarray(ctx
, sizes
, base
, type
);
2684 else if(ctx
-> token
== RECORD
)
2686 oberon_type_t
* rec
;
2688 rec
-> class = OBERON_TYPE_RECORD
;
2689 rec
-> module
= ctx
-> mod
;
2691 oberon_assert_token(ctx
, RECORD
);
2692 oberon_type_record_body(ctx
, rec
);
2693 oberon_assert_token(ctx
, END
);
2697 else if(ctx
-> token
== POINTER
)
2699 oberon_assert_token(ctx
, POINTER
);
2700 oberon_assert_token(ctx
, TO
);
2702 oberon_type_t
* base
;
2703 base
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2704 oberon_type(ctx
, &base
);
2706 oberon_type_t
* ptr
;
2708 ptr
-> class = OBERON_TYPE_POINTER
;
2711 else if(ctx
-> token
== PROCEDURE
)
2713 oberon_open_scope(ctx
);
2714 oberon_assert_token(ctx
, PROCEDURE
);
2715 oberon_opt_formal_pars(ctx
, type
);
2716 oberon_close_scope(ctx
-> decl
);
2720 oberon_error(ctx
, "invalid type declaration");
2725 oberon_type_decl(oberon_context_t
* ctx
)
2728 oberon_object_t
* newtype
;
2729 oberon_type_t
* type
;
2733 name
= oberon_assert_ident(ctx
);
2734 oberon_def(ctx
, &export
, &read_only
);
2736 newtype
= oberon_find_object(ctx
-> decl
, name
, 0);
2739 newtype
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, export
, read_only
, false);
2740 newtype
-> type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
2741 assert(newtype
-> type
);
2745 if(newtype
-> class != OBERON_CLASS_TYPE
)
2747 oberon_error(ctx
, "mult definition");
2750 if(newtype
-> linked
)
2752 oberon_error(ctx
, "mult definition - already linked");
2755 newtype
-> export
= export
;
2756 newtype
-> read_only
= read_only
;
2759 oberon_assert_token(ctx
, EQUAL
);
2761 type
= newtype
-> type
;
2762 oberon_type(ctx
, &type
);
2764 if(type
-> class == OBERON_TYPE_NOTYPE
)
2766 oberon_error(ctx
, "recursive alias declaration");
2769 newtype
-> type
= type
;
2770 newtype
-> linked
= 1;
2773 static void oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2774 static void oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2777 oberon_prevent_recursive_pointer(oberon_context_t
* ctx
, oberon_type_t
* type
)
2779 if(type
-> class != OBERON_TYPE_POINTER
2780 && type
-> class != OBERON_TYPE_ARRAY
)
2785 if(type
-> recursive
)
2787 if(type
-> class == OBERON_TYPE_POINTER
)
2789 oberon_error(ctx
, "recursive pointer declaration");
2793 oberon_error(ctx
, "recursive array declaration (pointer)");
2797 if(type
-> class == OBERON_TYPE_POINTER
2798 && type
-> base
-> class == OBERON_TYPE_POINTER
)
2800 oberon_error(ctx
, "attempt to make pointer to pointer");
2803 type
-> recursive
= 1;
2805 oberon_prevent_recursive_pointer(ctx
, type
-> base
);
2807 type
-> recursive
= 0;
2811 oberon_prevent_recursive_record(oberon_context_t
* ctx
, oberon_type_t
* type
)
2813 if(type
-> class != OBERON_TYPE_RECORD
)
2818 if(type
-> recursive
)
2820 oberon_error(ctx
, "recursive record declaration");
2823 type
-> recursive
= 1;
2827 oberon_prevent_recursive_record(ctx
, type
-> base
);
2830 int num_fields
= type
-> num_decl
;
2831 oberon_object_t
* field
= type
-> decl
;
2832 for(int i
= 0; i
< num_fields
; i
++)
2834 oberon_prevent_recursive_object(ctx
, field
);
2835 field
= field
-> next
;
2838 type
-> recursive
= 0;
2841 oberon_prevent_recursive_procedure(oberon_context_t
* ctx
, oberon_type_t
* type
)
2843 if(type
-> class != OBERON_TYPE_PROCEDURE
)
2848 if(type
-> recursive
)
2850 oberon_error(ctx
, "recursive procedure declaration");
2853 type
-> recursive
= 1;
2855 int num_fields
= type
-> num_decl
;
2856 oberon_object_t
* field
= type
-> decl
;
2857 for(int i
= 0; i
< num_fields
; i
++)
2859 oberon_prevent_recursive_object(ctx
, field
);
2860 field
= field
-> next
;
2863 type
-> recursive
= 0;
2867 oberon_prevent_recursive_array(oberon_context_t
* ctx
, oberon_type_t
* type
)
2869 if(type
-> class != OBERON_TYPE_ARRAY
)
2874 if(type
-> recursive
)
2876 oberon_error(ctx
, "recursive array declaration");
2879 type
-> recursive
= 1;
2881 oberon_prevent_recursive_type(ctx
, type
-> base
);
2883 type
-> recursive
= 0;
2887 oberon_prevent_recursive_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2889 if(type
-> class == OBERON_TYPE_POINTER
)
2891 oberon_prevent_recursive_pointer(ctx
, type
);
2893 else if(type
-> class == OBERON_TYPE_RECORD
)
2895 oberon_prevent_recursive_record(ctx
, type
);
2897 else if(type
-> class == OBERON_TYPE_ARRAY
)
2899 oberon_prevent_recursive_array(ctx
, type
);
2901 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
2903 oberon_prevent_recursive_procedure(ctx
, type
);
2908 oberon_prevent_recursive_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
2912 case OBERON_CLASS_VAR
:
2913 case OBERON_CLASS_TYPE
:
2914 case OBERON_CLASS_PARAM
:
2915 case OBERON_CLASS_VAR_PARAM
:
2916 case OBERON_CLASS_FIELD
:
2917 oberon_prevent_recursive_type(ctx
, x
-> type
);
2919 case OBERON_CLASS_CONST
:
2920 case OBERON_CLASS_PROC
:
2921 case OBERON_CLASS_MODULE
:
2924 oberon_error(ctx
, "oberon_prevent_recursive_object: wat");
2930 oberon_prevent_recursive_decl(oberon_context_t
* ctx
)
2932 oberon_object_t
* x
= ctx
-> decl
-> list
-> next
;
2936 oberon_prevent_recursive_object(ctx
, x
);
2941 static void oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
);
2942 static void oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
);
2945 oberon_initialize_record_fields(oberon_context_t
* ctx
, oberon_type_t
* type
)
2947 assert(type
-> class == OBERON_TYPE_RECORD
);
2949 int num_fields
= type
-> num_decl
;
2950 oberon_object_t
* field
= type
-> decl
;
2951 for(int i
= 0; i
< num_fields
; i
++)
2953 oberon_initialize_object(ctx
, field
);
2954 field
= field
-> next
;
2957 oberon_generator_init_record(ctx
, type
);
2961 oberon_initialize_type(oberon_context_t
* ctx
, oberon_type_t
* type
)
2963 if(type
-> class == OBERON_TYPE_NOTYPE
)
2965 oberon_error(ctx
, "undeclarated type");
2968 if(type
-> initialized
)
2973 type
-> initialized
= 1;
2975 if(type
-> class == OBERON_TYPE_POINTER
|| type
-> class == OBERON_TYPE_ARRAY
)
2977 if(type
-> class == OBERON_TYPE_ARRAY
2978 && type
-> size
!= 0
2979 && type
-> base
-> class == OBERON_TYPE_ARRAY
2980 && type
-> base
-> size
== 0)
2982 oberon_error(ctx
, "open array not allowed as array element");
2985 oberon_type_t
* rec
= type
-> base
;
2986 while(rec
-> class == OBERON_TYPE_ARRAY
|| rec
-> class == OBERON_TYPE_POINTER
)
2991 if(rec
-> class == OBERON_TYPE_RECORD
2992 && rec
-> initialized
== 0)
2994 rec
-> initialized
= 1;
2995 oberon_generator_init_type(ctx
, rec
);
2996 oberon_initialize_type(ctx
, type
-> base
);
2997 oberon_generator_init_type(ctx
, type
);
2998 oberon_initialize_record_fields(ctx
, rec
);
3002 oberon_initialize_type(ctx
, type
-> base
);
3003 oberon_generator_init_type(ctx
, type
);
3006 else if(type
-> class == OBERON_TYPE_RECORD
)
3008 printf("Init type: RECORD\n");
3009 oberon_generator_init_type(ctx
, type
);
3010 oberon_initialize_record_fields(ctx
, type
);
3012 else if(type
-> class == OBERON_TYPE_PROCEDURE
)
3014 printf("Init type: PROCEDURE\n");
3015 int num_fields
= type
-> num_decl
;
3016 oberon_object_t
* field
= type
-> decl
;
3017 for(int i
= 0; i
< num_fields
; i
++)
3019 oberon_initialize_type(ctx
, field
-> type
);
3020 field
= field
-> next
;
3023 oberon_generator_init_type(ctx
, type
);
3027 oberon_generator_init_type(ctx
, type
);
3032 oberon_initialize_object(oberon_context_t
* ctx
, oberon_object_t
* x
)
3034 if(x
-> initialized
)
3039 x
-> initialized
= 1;
3043 case OBERON_CLASS_TYPE
:
3044 oberon_initialize_type(ctx
, x
-> type
);
3046 case OBERON_CLASS_VAR
:
3047 case OBERON_CLASS_FIELD
:
3048 if(x
-> type
-> class == OBERON_TYPE_ARRAY
)
3050 if(x
-> type
-> size
== 0)
3052 oberon_error(ctx
, "open array not allowed as variable or field");
3055 oberon_initialize_type(ctx
, x
-> type
);
3056 oberon_generator_init_var(ctx
, x
);
3058 case OBERON_CLASS_PARAM
:
3059 case OBERON_CLASS_VAR_PARAM
:
3060 oberon_initialize_type(ctx
, x
-> type
);
3061 oberon_generator_init_var(ctx
, x
);
3063 case OBERON_CLASS_CONST
:
3064 case OBERON_CLASS_PROC
:
3065 case OBERON_CLASS_MODULE
:
3068 oberon_error(ctx
, "oberon_initialize_object: wat");
3074 oberon_initialize_decl(oberon_context_t
* ctx
)
3076 oberon_object_t
* x
= ctx
-> decl
-> list
;
3080 oberon_initialize_object(ctx
, x
-> next
);
3086 oberon_prevent_undeclarated_procedures(oberon_context_t
* ctx
)
3088 oberon_object_t
* x
= ctx
-> decl
-> list
;
3092 if(x
-> next
-> class == OBERON_CLASS_PROC
)
3094 if(x
-> next
-> linked
== 0)
3096 oberon_error(ctx
, "unresolved forward declaration");
3104 oberon_decl_seq(oberon_context_t
* ctx
)
3106 if(ctx
-> token
== CONST
)
3108 oberon_assert_token(ctx
, CONST
);
3109 while(ctx
-> token
== IDENT
)
3111 oberon_const_decl(ctx
);
3112 oberon_assert_token(ctx
, SEMICOLON
);
3116 if(ctx
-> token
== TYPE
)
3118 oberon_assert_token(ctx
, TYPE
);
3119 while(ctx
-> token
== IDENT
)
3121 oberon_type_decl(ctx
);
3122 oberon_assert_token(ctx
, SEMICOLON
);
3126 if(ctx
-> token
== VAR
)
3128 oberon_assert_token(ctx
, VAR
);
3129 while(ctx
-> token
== IDENT
)
3131 oberon_var_decl(ctx
);
3132 oberon_assert_token(ctx
, SEMICOLON
);
3136 oberon_prevent_recursive_decl(ctx
);
3137 oberon_initialize_decl(ctx
);
3139 while(ctx
-> token
== PROCEDURE
)
3141 oberon_proc_decl(ctx
);
3142 oberon_assert_token(ctx
, SEMICOLON
);
3145 oberon_prevent_undeclarated_procedures(ctx
);
3148 static oberon_expr_t
*
3149 oberon_make_temp_var_item(oberon_context_t
* ctx
, oberon_type_t
* type
)
3151 oberon_object_t
* x
;
3152 oberon_expr_t
* expr
;
3154 x
= oberon_create_object(ctx
-> decl
, "TEMP", OBERON_CLASS_VAR
, false, false);
3157 oberon_generator_init_temp_var(ctx
, x
);
3159 expr
= oberon_new_item(MODE_VAR
, type
, false);
3160 expr
-> item
.var
= x
;
3165 oberon_statement_seq(oberon_context_t
* ctx
);
3168 oberon_assign(oberon_context_t
* ctx
, oberon_expr_t
* src
, oberon_expr_t
* dst
)
3170 oberon_check_dst(ctx
, dst
);
3171 oberon_check_assignment_compatible(ctx
, src
, dst
-> result
);
3173 if(oberon_is_array_of_char_type(dst
-> result
)
3174 && oberon_is_string_type(src
-> result
))
3177 oberon_make_copy_call(ctx
, 2, src
);
3181 src
= oberon_cast_expr(ctx
, src
, dst
-> result
);
3182 oberon_generate_assign(ctx
, src
, dst
);
3186 static oberon_expr_t
*
3187 oberon_case_labels(oberon_context_t
* ctx
, oberon_expr_t
* val
)
3191 oberon_expr_t
* cond
;
3192 oberon_expr_t
* cond2
;
3194 e1
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3197 if(ctx
-> token
== DOTDOT
)
3199 oberon_assert_token(ctx
, DOTDOT
);
3200 e2
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3206 cond
= oberon_make_bin_op(ctx
, EQUAL
, val
, e1
);
3210 /* val >= e1 && val <= e2 */
3211 cond
= oberon_make_bin_op(ctx
, GEQ
, val
, e1
);
3212 cond2
= oberon_make_bin_op(ctx
, LEQ
, val
, e2
);
3213 cond
= oberon_make_bin_op(ctx
, AND
, cond
, cond2
);
3220 oberon_case(oberon_context_t
* ctx
, oberon_expr_t
* val
, gen_label_t
* end
)
3222 oberon_expr_t
* cond
;
3223 oberon_expr_t
* cond2
;
3224 gen_label_t
* this_end
;
3226 if(ISEXPR(ctx
-> token
))
3228 this_end
= oberon_generator_reserve_label(ctx
);
3230 cond
= oberon_case_labels(ctx
, val
);
3231 while(ctx
-> token
== COMMA
)
3233 oberon_assert_token(ctx
, COMMA
);
3235 cond2
= oberon_case_labels(ctx
, val
);
3236 cond
= oberon_make_bin_op(ctx
, OR
, cond
, cond2
);
3238 oberon_assert_token(ctx
, COLON
);
3240 oberon_generate_branch(ctx
, cond
, false, this_end
);
3241 oberon_statement_seq(ctx
);
3242 oberon_generate_goto(ctx
, end
);
3244 oberon_generate_label(ctx
, this_end
);
3249 oberon_case_statement(oberon_context_t
* ctx
)
3251 oberon_expr_t
* val
;
3252 oberon_expr_t
* expr
;
3255 end
= oberon_generator_reserve_label(ctx
);
3257 oberon_assert_token(ctx
, CASE
);
3258 expr
= oberon_expr(ctx
);
3259 val
= oberon_make_temp_var_item(ctx
, expr
-> result
);
3260 oberon_assign(ctx
, expr
, val
);
3261 oberon_assert_token(ctx
, OF
);
3262 oberon_case(ctx
, val
, end
);
3263 while(ctx
-> token
== BAR
)
3265 oberon_assert_token(ctx
, BAR
);
3266 oberon_case(ctx
, val
, end
);
3269 if(ctx
-> token
== ELSE
)
3271 oberon_assert_token(ctx
, ELSE
);
3272 oberon_statement_seq(ctx
);
3276 oberon_generate_trap(ctx
, -1);
3279 oberon_generate_label(ctx
, end
);
3280 oberon_assert_token(ctx
, END
);
3284 oberon_with_guard_do(oberon_context_t
* ctx
, gen_label_t
* end
)
3286 oberon_expr_t
* val
;
3287 oberon_expr_t
* var
;
3288 oberon_expr_t
* type
;
3289 oberon_expr_t
* cond
;
3290 oberon_expr_t
* cast
;
3291 oberon_type_t
* old_type
;
3292 gen_var_t
* old_var
;
3293 gen_label_t
* this_end
;
3295 this_end
= oberon_generator_reserve_label(ctx
);
3297 var
= oberon_qualident_expr(ctx
);
3298 oberon_assert_token(ctx
, COLON
);
3299 type
= oberon_qualident_expr(ctx
);
3300 cond
= oberon_make_bin_op(ctx
, IS
, var
, type
);
3302 oberon_assert_token(ctx
, DO
);
3303 oberon_generate_branch(ctx
, cond
, false, this_end
);
3305 /* Сохраняем ссылку во временной переменной */
3306 val
= oberon_make_temp_var_item(ctx
, type
-> result
);
3307 //cast = oberno_make_record_cast(ctx, var, type -> result);
3308 cast
= oberon_cast_expr(ctx
, var
, type
-> result
);
3309 oberon_assign(ctx
, cast
, val
);
3310 /* Подменяем тип у оригинальной переменной */
3311 old_type
= var
-> item
.var
-> type
;
3312 var
-> item
.var
-> type
= type
-> result
;
3313 /* Подменяем ссылку на переменную */
3314 old_var
= var
-> item
.var
-> gen_var
;
3315 var
-> item
.var
-> gen_var
= val
-> item
.var
-> gen_var
;
3317 oberon_statement_seq(ctx
);
3318 oberon_generate_goto(ctx
, end
);
3319 oberon_generate_label(ctx
, this_end
);
3321 /* Возвращаем исходное состояние */
3322 var
-> item
.var
-> gen_var
= old_var
;
3323 var
-> item
.var
-> type
= old_type
;
3327 oberon_with_statement(oberon_context_t
* ctx
)
3330 end
= oberon_generator_reserve_label(ctx
);
3332 oberon_assert_token(ctx
, WITH
);
3333 oberon_with_guard_do(ctx
, end
);
3334 while(ctx
-> token
== BAR
)
3336 oberon_assert_token(ctx
, BAR
);
3337 oberon_with_guard_do(ctx
, end
);
3340 if(ctx
-> token
== ELSE
)
3342 oberon_assert_token(ctx
, ELSE
);
3343 oberon_statement_seq(ctx
);
3347 oberon_generate_trap(ctx
, -2);
3350 oberon_generate_label(ctx
, end
);
3351 oberon_assert_token(ctx
, END
);
3355 oberon_statement(oberon_context_t
* ctx
)
3357 oberon_expr_t
* item1
;
3358 oberon_expr_t
* item2
;
3360 if(ctx
-> token
== IDENT
)
3362 item1
= oberon_designator(ctx
);
3363 if(ctx
-> token
== ASSIGN
)
3365 oberon_assert_token(ctx
, ASSIGN
);
3366 item2
= oberon_expr(ctx
);
3367 oberon_assign(ctx
, item2
, item1
);
3371 oberon_opt_proc_parens(ctx
, item1
);
3374 else if(ctx
-> token
== IF
)
3378 oberon_expr_t
* cond
;
3380 els
= oberon_generator_reserve_label(ctx
);
3381 end
= oberon_generator_reserve_label(ctx
);
3383 oberon_assert_token(ctx
, IF
);
3384 cond
= oberon_expr(ctx
);
3385 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3387 oberon_error(ctx
, "condition must be boolean");
3389 oberon_assert_token(ctx
, THEN
);
3390 oberon_generate_branch(ctx
, cond
, false, els
);
3391 oberon_statement_seq(ctx
);
3392 oberon_generate_goto(ctx
, end
);
3393 oberon_generate_label(ctx
, els
);
3395 while(ctx
-> token
== ELSIF
)
3397 els
= oberon_generator_reserve_label(ctx
);
3399 oberon_assert_token(ctx
, ELSIF
);
3400 cond
= oberon_expr(ctx
);
3401 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3403 oberon_error(ctx
, "condition must be boolean");
3405 oberon_assert_token(ctx
, THEN
);
3406 oberon_generate_branch(ctx
, cond
, false, els
);
3407 oberon_statement_seq(ctx
);
3408 oberon_generate_goto(ctx
, end
);
3409 oberon_generate_label(ctx
, els
);
3412 if(ctx
-> token
== ELSE
)
3414 oberon_assert_token(ctx
, ELSE
);
3415 oberon_statement_seq(ctx
);
3418 oberon_generate_label(ctx
, end
);
3419 oberon_assert_token(ctx
, END
);
3421 else if(ctx
-> token
== WHILE
)
3423 gen_label_t
* begin
;
3425 oberon_expr_t
* cond
;
3427 begin
= oberon_generator_reserve_label(ctx
);
3428 end
= oberon_generator_reserve_label(ctx
);
3430 oberon_assert_token(ctx
, WHILE
);
3431 oberon_generate_label(ctx
, begin
);
3432 cond
= oberon_expr(ctx
);
3433 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3435 oberon_error(ctx
, "condition must be boolean");
3437 oberon_generate_branch(ctx
, cond
, false, end
);
3439 oberon_assert_token(ctx
, DO
);
3440 oberon_statement_seq(ctx
);
3441 oberon_generate_goto(ctx
, begin
);
3443 oberon_assert_token(ctx
, END
);
3444 oberon_generate_label(ctx
, end
);
3446 else if(ctx
-> token
== REPEAT
)
3448 gen_label_t
* begin
;
3449 oberon_expr_t
* cond
;
3451 begin
= oberon_generator_reserve_label(ctx
);
3452 oberon_generate_label(ctx
, begin
);
3453 oberon_assert_token(ctx
, REPEAT
);
3455 oberon_statement_seq(ctx
);
3457 oberon_assert_token(ctx
, UNTIL
);
3459 cond
= oberon_expr(ctx
);
3460 if(cond
-> result
-> class != OBERON_TYPE_BOOLEAN
)
3462 oberon_error(ctx
, "condition must be boolean");
3465 oberon_generate_branch(ctx
, cond
, true, begin
);
3467 else if(ctx
-> token
== FOR
)
3469 oberon_expr_t
* from
;
3470 oberon_expr_t
* index
;
3472 oberon_expr_t
* bound
;
3474 oberon_expr_t
* cond
;
3475 oberon_expr_t
* count
;
3476 gen_label_t
* begin
;
3481 begin
= oberon_generator_reserve_label(ctx
);
3482 end
= oberon_generator_reserve_label(ctx
);
3484 oberon_assert_token(ctx
, FOR
);
3485 iname
= oberon_assert_ident(ctx
);
3486 index
= oberon_ident_item(ctx
, iname
);
3487 oberon_assert_token(ctx
, ASSIGN
);
3488 from
= oberon_expr(ctx
);
3489 oberon_assert_token(ctx
, TO
);
3490 bound
= oberon_make_temp_var_item(ctx
, index
-> result
);
3491 to
= oberon_expr(ctx
);
3492 oberon_assign(ctx
, to
, bound
); // сначала temp
3493 oberon_assign(ctx
, from
, index
); // потом i
3494 if(ctx
-> token
== BY
)
3496 oberon_assert_token(ctx
, BY
);
3497 by
= (oberon_expr_t
*) oberon_const_expr(ctx
);
3501 by
= oberon_make_integer(ctx
, 1);
3504 if(by
-> result
-> class != OBERON_TYPE_INTEGER
)
3506 oberon_error(ctx
, "must be integer");
3509 if(by
-> item
.integer
> 0)
3513 else if(by
-> item
.integer
< 0)
3519 oberon_error(ctx
, "zero step not allowed");
3522 oberon_assert_token(ctx
, DO
);
3523 oberon_generate_label(ctx
, begin
);
3524 cond
= oberon_make_bin_op(ctx
, op
, index
, bound
);
3525 oberon_generate_branch(ctx
, cond
, false, end
);
3526 oberon_statement_seq(ctx
);
3527 count
= oberon_make_bin_op(ctx
, PLUS
, index
, by
);
3528 oberon_assign(ctx
, count
, index
);
3529 oberon_generate_goto(ctx
, begin
);
3530 oberon_generate_label(ctx
, end
);
3531 oberon_assert_token(ctx
, END
);
3533 else if(ctx
-> token
== LOOP
)
3535 gen_label_t
* begin
;
3538 begin
= oberon_generator_reserve_label(ctx
);
3539 end
= oberon_generator_reserve_label(ctx
);
3541 oberon_open_scope(ctx
);
3542 oberon_assert_token(ctx
, LOOP
);
3543 oberon_generate_label(ctx
, begin
);
3544 ctx
-> decl
-> exit_label
= end
;
3545 oberon_statement_seq(ctx
);
3546 oberon_generate_goto(ctx
, begin
);
3547 oberon_generate_label(ctx
, end
);
3548 oberon_assert_token(ctx
, END
);
3549 oberon_close_scope(ctx
-> decl
);
3551 else if(ctx
-> token
== EXIT
)
3553 oberon_assert_token(ctx
, EXIT
);
3554 if(ctx
-> decl
-> exit_label
== NULL
)
3556 oberon_error(ctx
, "not in LOOP-END");
3558 oberon_generate_goto(ctx
, ctx
-> decl
-> exit_label
);
3560 else if(ctx
-> token
== CASE
)
3562 oberon_case_statement(ctx
);
3564 else if(ctx
-> token
== WITH
)
3566 oberon_with_statement(ctx
);
3568 else if(ctx
-> token
== RETURN
)
3570 oberon_assert_token(ctx
, RETURN
);
3571 if(ISEXPR(ctx
-> token
))
3573 oberon_expr_t
* expr
;
3574 expr
= oberon_expr(ctx
);
3575 oberon_make_return(ctx
, expr
);
3579 oberon_make_return(ctx
, NULL
);
3585 oberon_statement_seq(oberon_context_t
* ctx
)
3587 oberon_statement(ctx
);
3588 while(ctx
-> token
== SEMICOLON
)
3590 oberon_assert_token(ctx
, SEMICOLON
);
3591 oberon_statement(ctx
);
3596 oberon_import_module(oberon_context_t
* ctx
, char * alias
, char * name
)
3598 oberon_module_t
* m
= ctx
-> module_list
;
3599 while(m
&& strcmp(m
-> name
, name
) != 0)
3606 oberon_scanner_t
* s
;
3607 s
= ctx
-> import_module(name
);
3610 oberon_error(ctx
, "no such module %s", name
);
3613 m
= oberon_compile_module(ctx
, s
);
3619 oberon_error(ctx
, "cyclic module import");
3622 oberon_object_t
* ident
;
3623 ident
= oberon_define_object(ctx
-> decl
, alias
, OBERON_CLASS_MODULE
, false, false, false);
3624 ident
-> module
= m
;
3628 oberon_import_decl(oberon_context_t
* ctx
)
3633 alias
= name
= oberon_assert_ident(ctx
);
3634 if(ctx
-> token
== ASSIGN
)
3636 oberon_assert_token(ctx
, ASSIGN
);
3637 name
= oberon_assert_ident(ctx
);
3640 oberon_import_module(ctx
, alias
, name
);
3644 oberon_import_list(oberon_context_t
* ctx
)
3646 oberon_assert_token(ctx
, IMPORT
);
3648 oberon_import_decl(ctx
);
3649 while(ctx
-> token
== COMMA
)
3651 oberon_assert_token(ctx
, COMMA
);
3652 oberon_import_decl(ctx
);
3655 oberon_assert_token(ctx
, SEMICOLON
);
3659 oberon_parse_module(oberon_context_t
* ctx
)
3663 oberon_read_token(ctx
);
3665 oberon_assert_token(ctx
, MODULE
);
3666 name1
= oberon_assert_ident(ctx
);
3667 oberon_assert_token(ctx
, SEMICOLON
);
3668 ctx
-> mod
-> name
= name1
;
3670 oberon_generator_init_module(ctx
, ctx
-> mod
);
3672 if(ctx
-> token
== IMPORT
)
3674 oberon_import_list(ctx
);
3677 oberon_decl_seq(ctx
);
3679 oberon_generate_begin_module(ctx
);
3680 if(ctx
-> token
== BEGIN
)
3682 oberon_assert_token(ctx
, BEGIN
);
3683 oberon_statement_seq(ctx
);
3685 oberon_generate_end_module(ctx
);
3687 oberon_assert_token(ctx
, END
);
3688 name2
= oberon_assert_ident(ctx
);
3689 oberon_expect_token(ctx
, DOT
);
3691 if(strcmp(name1
, name2
) != 0)
3693 oberon_error(ctx
, "module name not matched");
3696 oberon_generator_fini_module(ctx
-> mod
);
3699 // =======================================================================
3701 // =======================================================================
3703 static oberon_expr_t
*
3704 oberon_make_min_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3708 oberon_error(ctx
, "too few arguments");
3713 oberon_error(ctx
, "too mach arguments");
3716 oberon_expr_t
* arg
;
3719 if(!oberon_is_type_expr(arg
))
3721 oberon_error(ctx
, "MIN accept only type");
3724 oberon_expr_t
* expr
;
3725 int bits
= arg
-> result
-> size
* 8;
3726 switch(arg
-> result
-> class)
3728 case OBERON_TYPE_INTEGER
:
3729 expr
= oberon_make_integer(ctx
, -powl(2, bits
- 1));
3731 case OBERON_TYPE_BOOLEAN
:
3732 expr
= oberon_make_boolean(ctx
, false);
3734 case OBERON_TYPE_CHAR
:
3735 expr
= oberon_make_char(ctx
, 0);
3737 case OBERON_TYPE_REAL
:
3738 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (-FLT_MAX
) : (-DBL_MAX
), arg
-> result
);
3740 case OBERON_TYPE_SET
:
3741 expr
= oberon_make_integer(ctx
, 0);
3744 oberon_error(ctx
, "allowed only basic types");
3751 static oberon_expr_t
*
3752 oberon_make_max_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3756 oberon_error(ctx
, "too few arguments");
3761 oberon_error(ctx
, "too mach arguments");
3764 oberon_expr_t
* arg
;
3767 if(!oberon_is_type_expr(arg
))
3769 oberon_error(ctx
, "MAX accept only type");
3772 oberon_expr_t
* expr
;
3773 int bits
= arg
-> result
-> size
* 8;
3774 switch(arg
-> result
-> class)
3776 case OBERON_TYPE_INTEGER
:
3777 expr
= oberon_make_integer(ctx
, powl(2, bits
- 1) - 1);
3779 case OBERON_TYPE_BOOLEAN
:
3780 expr
= oberon_make_boolean(ctx
, true);
3782 case OBERON_TYPE_CHAR
:
3783 expr
= oberon_make_char(ctx
, powl(2, bits
) - 1);
3785 case OBERON_TYPE_REAL
:
3786 expr
= oberon_make_real_typed(ctx
, (bits
<= 32) ? (FLT_MAX
) : (DBL_MAX
), arg
-> result
);
3788 case OBERON_TYPE_SET
:
3789 expr
= oberon_make_integer(ctx
, bits
);
3792 oberon_error(ctx
, "allowed only basic types");
3799 static oberon_expr_t
*
3800 oberon_make_size_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3804 oberon_error(ctx
, "too few arguments");
3809 oberon_error(ctx
, "too mach arguments");
3812 oberon_expr_t
* arg
;
3814 if(!oberon_is_type_expr(arg
))
3816 oberon_error(ctx
, "SIZE accept only type");
3820 oberon_expr_t
* expr
;
3821 oberon_type_t
* type
= arg
-> result
;
3822 switch(type
-> class)
3824 case OBERON_TYPE_INTEGER
:
3825 case OBERON_TYPE_BOOLEAN
:
3826 case OBERON_TYPE_REAL
:
3827 case OBERON_TYPE_CHAR
:
3828 case OBERON_TYPE_SET
:
3829 size
= type
-> size
;
3832 oberon_error(ctx
, "TODO SIZE");
3836 expr
= oberon_make_integer(ctx
, size
);
3840 static oberon_expr_t
*
3841 oberon_make_abs_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3845 oberon_error(ctx
, "too few arguments");
3850 oberon_error(ctx
, "too mach arguments");
3853 oberon_expr_t
* arg
;
3855 oberon_check_src(ctx
, arg
);
3857 if(oberon_is_number_type(arg
-> result
))
3859 oberon_error(ctx
, "ABS accepts only numbers");
3862 oberon_expr_t
* expr
;
3863 if(oberon_is_const(arg
))
3865 if(oberon_is_real_type(arg
-> result
))
3867 double x
= arg
-> item
.real
;
3868 expr
= oberon_make_real(ctx
, fabsl(x
), arg
-> result
);
3872 int64_t x
= arg
-> item
.integer
;
3873 expr
= oberon_make_integer(ctx
, llabs(x
));
3878 expr
= oberon_new_operator(OP_ABS
, arg
-> result
, arg
, NULL
);
3884 oberon_make_inc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3888 oberon_error(ctx
, "too few arguments");
3893 oberon_error(ctx
, "too mach arguments");
3896 oberon_expr_t
* dst
;
3898 oberon_check_dst(ctx
, dst
);
3900 if(!oberon_is_integer_type(dst
-> result
))
3902 oberon_error(ctx
, "expect integer");
3905 oberon_expr_t
* expr
;
3906 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_make_integer(ctx
, 1));
3907 oberon_assign(ctx
, expr
, dst
);
3911 oberon_make_incl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3915 oberon_error(ctx
, "too few arguments");
3920 oberon_error(ctx
, "too mach arguments");
3923 oberon_expr_t
* dst
;
3925 oberon_check_dst(ctx
, dst
);
3927 if(!oberon_is_set_type(dst
-> result
))
3929 oberon_error(ctx
, "expect integer");
3933 x
= list_args
-> next
;
3934 oberon_check_src(ctx
, x
);
3936 if(!oberon_is_integer_type(x
-> result
))
3938 oberon_error(ctx
, "expect integer");
3941 oberon_expr_t
* expr
;
3942 expr
= oberon_make_bin_op(ctx
, PLUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3943 oberon_assign(ctx
, expr
, dst
);
3947 oberon_make_excl_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3951 oberon_error(ctx
, "too few arguments");
3956 oberon_error(ctx
, "too mach arguments");
3959 oberon_expr_t
* dst
;
3961 oberon_check_dst(ctx
, dst
);
3963 if(!oberon_is_set_type(dst
-> result
))
3965 oberon_error(ctx
, "expect integer");
3969 x
= list_args
-> next
;
3970 oberon_check_src(ctx
, x
);
3972 if(!oberon_is_integer_type(x
-> result
))
3974 oberon_error(ctx
, "expect integer");
3977 oberon_expr_t
* expr
;
3978 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_new_operator(OP_RANGE
, dst
-> result
, x
, NULL
));
3979 oberon_assign(ctx
, expr
, dst
);
3983 oberon_make_dec_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
3987 oberon_error(ctx
, "too few arguments");
3992 oberon_error(ctx
, "too mach arguments");
3995 oberon_expr_t
* dst
;
3997 oberon_check_dst(ctx
, dst
);
3999 if(!oberon_is_integer_type(dst
-> result
))
4001 oberon_error(ctx
, "expect integer");
4004 oberon_expr_t
* expr
;
4005 expr
= oberon_make_bin_op(ctx
, MINUS
, dst
, oberon_make_integer(ctx
, 1));
4006 oberon_assign(ctx
, expr
, dst
);
4010 oberon_make_new_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4014 oberon_error(ctx
, "too few arguments");
4017 oberon_expr_t
* dst
;
4019 oberon_check_dst(ctx
, dst
);
4021 oberon_type_t
* type
;
4022 type
= dst
-> result
;
4024 if(type
-> class != OBERON_TYPE_POINTER
)
4026 oberon_error(ctx
, "not a pointer");
4029 type
= type
-> base
;
4031 oberon_expr_t
* src
;
4032 src
= oberon_new_item(MODE_NEW
, dst
-> result
, 0);
4033 src
-> item
.num_args
= 0;
4034 src
-> item
.args
= NULL
;
4037 if(type
-> class == OBERON_TYPE_ARRAY
)
4039 if(type
-> size
== 0)
4041 oberon_type_t
* x
= type
;
4042 while(x
-> class == OBERON_TYPE_ARRAY
)
4052 if(num_args
< max_args
)
4054 oberon_error(ctx
, "too few arguments");
4057 if(num_args
> max_args
)
4059 oberon_error(ctx
, "too mach arguments");
4062 int num_sizes
= max_args
- 1;
4063 oberon_expr_t
* size_list
= list_args
-> next
;
4065 oberon_expr_t
* arg
= size_list
;
4066 for(int i
= 0; i
< max_args
- 1; i
++)
4068 oberon_check_src(ctx
, arg
);
4069 if(arg
-> result
-> class != OBERON_TYPE_INTEGER
)
4071 oberon_error(ctx
, "size must be integer");
4076 src
-> item
.num_args
= num_sizes
;
4077 src
-> item
.args
= size_list
;
4079 else if(type
-> class != OBERON_TYPE_RECORD
)
4081 oberon_error(ctx
, "oberon_make_new_call: wat");
4084 if(num_args
> max_args
)
4086 oberon_error(ctx
, "too mach arguments");
4089 oberon_assign(ctx
, src
, dst
);
4093 oberon_make_copy_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4097 oberon_error(ctx
, "too few arguments");
4102 oberon_error(ctx
, "too mach arguments");
4105 oberon_expr_t
* src
;
4107 oberon_check_src(ctx
, src
);
4109 oberon_expr_t
* dst
;
4110 dst
= list_args
-> next
;
4111 oberon_check_dst(ctx
, dst
);
4113 if(!oberon_is_string_type(src
-> result
) && !oberon_is_array_of_char_type(src
-> result
))
4115 oberon_error(ctx
, "source must be string or array of char");
4118 if(!oberon_is_array_of_char_type(dst
-> result
))
4120 oberon_error(ctx
, "dst must be array of char");
4123 oberon_generate_copy(ctx
, src
, dst
);
4127 oberon_make_assert_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4131 oberon_error(ctx
, "too few arguments");
4136 oberon_error(ctx
, "too mach arguments");
4139 oberon_expr_t
* cond
;
4141 oberon_check_src(ctx
, cond
);
4143 if(!oberon_is_boolean_type(cond
-> result
))
4145 oberon_error(ctx
, "expected boolean");
4150 oberon_generate_assert(ctx
, cond
);
4154 oberon_expr_t
* num
;
4155 num
= list_args
-> next
;
4156 oberon_check_src(ctx
, num
);
4158 if(!oberon_is_integer_type(num
-> result
))
4160 oberon_error(ctx
, "expected integer");
4163 oberon_check_const(ctx
, num
);
4165 oberon_generate_assert_n(ctx
, cond
, num
-> item
.integer
);
4170 oberon_make_halt_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4174 oberon_error(ctx
, "too few arguments");
4179 oberon_error(ctx
, "too mach arguments");
4182 oberon_expr_t
* num
;
4184 oberon_check_src(ctx
, num
);
4186 if(num
-> result
-> class != OBERON_TYPE_INTEGER
)
4188 oberon_error(ctx
, "expected integer");
4191 oberon_check_const(ctx
, num
);
4193 oberon_generate_halt(ctx
, num
-> item
.integer
);
4196 static oberon_expr_t
*
4197 oberon_make_ash_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4201 oberon_error(ctx
, "too few arguments");
4206 oberon_error(ctx
, "too mach arguments");
4209 oberon_expr_t
* arg1
;
4211 oberon_check_src(ctx
, arg1
);
4212 if(arg1
-> result
-> class != OBERON_TYPE_INTEGER
)
4214 oberon_error(ctx
, "expected integer");
4217 oberon_expr_t
* arg2
;
4218 arg2
= list_args
-> next
;
4219 oberon_check_src(ctx
, arg2
);
4220 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4222 oberon_error(ctx
, "expected integer");
4225 oberon_expr_t
* expr
;
4226 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4228 int64_t x
= arg1
-> item
.integer
;
4229 int64_t y
= arg2
-> item
.integer
;
4230 int64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4231 expr
= oberon_make_integer(ctx
, v
);
4235 expr
= oberon_new_operator(OP_ASH
, arg1
-> result
, arg1
, arg2
);
4241 static oberon_expr_t
*
4242 oberon_make_lsh_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4246 oberon_error(ctx
, "too few arguments");
4251 oberon_error(ctx
, "too mach arguments");
4254 oberon_expr_t
* arg1
;
4256 oberon_check_src(ctx
, arg1
);
4258 oberon_type_t
* t
= arg1
-> result
;
4259 if(!oberon_is_integer_type(t
)
4260 && !oberon_is_char_type(t
)
4261 && !oberon_is_system_byte_type(t
))
4263 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4266 oberon_expr_t
* arg2
;
4267 arg2
= list_args
-> next
;
4268 oberon_check_src(ctx
, arg2
);
4269 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4271 oberon_error(ctx
, "expected integer");
4274 oberon_expr_t
* expr
;
4275 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4277 uint64_t x
= arg1
-> item
.integer
;
4278 int64_t y
= arg2
-> item
.integer
;
4279 uint64_t v
= (y
> 0) ? (x
<< y
) : (x
>> labs(y
));
4281 if(oberon_is_integer_type(t
))
4283 expr
= oberon_make_integer(ctx
, v
);
4285 else if(oberon_is_char_type(t
))
4287 expr
= oberon_make_char(ctx
, v
);
4291 expr
= oberon_make_system_byte(ctx
, v
);
4296 expr
= oberon_new_operator(OP_LSH
, arg1
-> result
, arg1
, arg2
);
4297 expr
= oberon_cast_expr(ctx
, expr
, t
);
4303 static oberon_expr_t
*
4304 oberon_make_rot_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4308 oberon_error(ctx
, "too few arguments");
4313 oberon_error(ctx
, "too mach arguments");
4316 oberon_expr_t
* arg1
;
4318 oberon_check_src(ctx
, arg1
);
4320 oberon_type_t
* t
= arg1
-> result
;
4321 if(!oberon_is_integer_type(t
)
4322 && !oberon_is_char_type(t
)
4323 && !oberon_is_system_byte_type(t
))
4325 oberon_error(ctx
, "expected integer, char, or SYSTEM.BYTE");
4328 oberon_expr_t
* arg2
;
4329 arg2
= list_args
-> next
;
4330 oberon_check_src(ctx
, arg2
);
4331 if(arg2
-> result
-> class != OBERON_TYPE_INTEGER
)
4333 oberon_error(ctx
, "expected integer");
4336 oberon_expr_t
* expr
;
4337 if(oberon_is_const(arg1
) && oberon_is_const(arg2
))
4339 uint64_t x
= arg1
-> item
.integer
;
4340 int64_t y
= arg2
-> item
.integer
;
4345 v
= (x
<< y
) | (x
>> (64 - y
));
4350 v
= (x
>> y
) | (x
<< (64 - y
));
4353 if(oberon_is_integer_type(t
))
4355 expr
= oberon_make_integer(ctx
, v
);
4357 else if(oberon_is_char_type(t
))
4359 expr
= oberon_make_char(ctx
, v
);
4363 expr
= oberon_make_system_byte(ctx
, v
);
4368 expr
= oberon_new_operator(OP_ROT
, arg1
-> result
, arg1
, arg2
);
4369 expr
= oberon_cast_expr(ctx
, expr
, t
);
4375 static oberon_expr_t
*
4376 oberon_make_cap_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4380 oberon_error(ctx
, "too few arguments");
4385 oberon_error(ctx
, "too mach arguments");
4388 oberon_expr_t
* arg
;
4390 oberon_check_src(ctx
, arg
);
4392 if(!oberon_is_char_type(arg
-> result
))
4394 oberon_error(ctx
, "expected char");
4397 oberon_expr_t
* expr
;
4398 if(oberon_is_const(arg
))
4400 expr
= oberon_make_char(ctx
, toupper(arg
-> item
.integer
));
4404 expr
= oberon_new_operator(OP_CAP
, arg
-> result
, arg
, NULL
);
4410 static oberon_expr_t
*
4411 oberon_make_chr_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4415 oberon_error(ctx
, "too few arguments");
4420 oberon_error(ctx
, "too mach arguments");
4423 oberon_expr_t
* arg
;
4425 oberon_check_src(ctx
, arg
);
4427 if(!oberon_is_integer_type(arg
-> result
))
4429 oberon_error(ctx
, "expected integer");
4432 oberon_expr_t
* expr
;
4433 if(oberon_is_const(arg
))
4435 expr
= oberon_make_char(ctx
, arg
-> item
.integer
);
4439 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> char_type
);
4444 static oberon_expr_t
*
4445 oberon_make_ord_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4449 oberon_error(ctx
, "too few arguments");
4454 oberon_error(ctx
, "too mach arguments");
4457 oberon_expr_t
* arg
;
4459 oberon_check_src(ctx
, arg
);
4461 if(!oberon_is_char_type(arg
-> result
) && !oberon_is_string_of_one(arg
))
4463 oberon_error(ctx
, "expected char");
4466 oberon_expr_t
* expr
;
4467 if(oberon_is_const(arg
))
4469 expr
= oberon_make_integer(ctx
, arg
-> item
.integer
);
4473 expr
= oberon_cast_expr(ctx
, arg
, ctx
-> int_type
);
4478 static oberon_expr_t
*
4479 oberon_make_entier_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4483 oberon_error(ctx
, "too few arguments");
4488 oberon_error(ctx
, "too mach arguments");
4491 oberon_expr_t
* arg
;
4493 oberon_check_src(ctx
, arg
);
4495 if(!oberon_is_real_type(arg
-> result
))
4497 oberon_error(ctx
, "expected real");
4500 oberon_expr_t
* expr
;
4501 if(oberon_is_const(arg
))
4503 expr
= oberon_make_integer(ctx
, floor(arg
-> item
.real
));
4507 expr
= oberon_new_operator(OP_ENTIER
, ctx
-> int_type
, arg
, NULL
);
4512 static oberon_expr_t
*
4513 oberon_make_odd_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4517 oberon_error(ctx
, "too few arguments");
4522 oberon_error(ctx
, "too mach arguments");
4525 oberon_expr_t
* arg
;
4527 oberon_check_src(ctx
, arg
);
4529 if(!oberon_is_integer_type(arg
-> result
))
4531 oberon_error(ctx
, "expected integer");
4534 oberon_expr_t
* expr
;
4535 expr
= oberon_make_bin_op(ctx
, MOD
, arg
, oberon_make_integer(ctx
, 2));
4536 expr
= oberon_make_bin_op(ctx
, EQUAL
, expr
, oberon_make_integer(ctx
, 1));
4540 static oberon_expr_t
*
4541 oberon_make_cc_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4545 oberon_error(ctx
, "too few arguments");
4550 oberon_error(ctx
, "too mach arguments");
4553 oberon_expr_t
* arg
;
4555 oberon_check_src(ctx
, arg
);
4556 oberon_check_const(ctx
, arg
);
4558 if(!oberon_is_integer_type(arg
-> result
))
4560 oberon_error(ctx
, "expected integer");
4563 /* n >= 0 && n <= 15 */
4565 oberon_expr_t
* cond1
;
4566 oberon_expr_t
* cond2
;
4567 cond1
= oberon_make_bin_op(ctx
, GEQ
, arg
, oberon_make_integer(ctx
, 0));
4568 cond2
= oberon_make_bin_op(ctx
, LEQ
, arg
, oberon_make_integer(ctx
, 15));
4569 return oberon_make_bin_op(ctx
, AND
, cond1
, cond2
);
4572 static oberon_expr_t
*
4573 oberon_make_short_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4577 oberon_error(ctx
, "too few arguments");
4582 oberon_error(ctx
, "too mach arguments");
4585 oberon_expr_t
* arg
;
4587 oberon_check_src(ctx
, arg
);
4589 if(arg
-> result
-> shorter
== NULL
)
4591 oberon_error(ctx
, "already shorter");
4594 oberon_expr_t
* expr
;
4595 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> shorter
);
4599 static oberon_expr_t
*
4600 oberon_make_long_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4604 oberon_error(ctx
, "too few arguments");
4609 oberon_error(ctx
, "too mach arguments");
4612 oberon_expr_t
* arg
;
4614 oberon_check_src(ctx
, arg
);
4616 if(arg
-> result
-> longer
== NULL
)
4618 oberon_error(ctx
, "already longer");
4621 oberon_expr_t
* expr
;
4622 expr
= oberon_cast_expr(ctx
, arg
, arg
-> result
-> longer
);
4626 static oberon_expr_t
*
4627 oberon_make_val_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4631 oberon_error(ctx
, "too few arguments");
4636 oberon_error(ctx
, "too mach arguments");
4639 oberon_expr_t
* typ
;
4641 if(!oberon_is_type_expr(typ
))
4643 oberon_error(ctx
, "requires type");
4646 oberon_expr_t
* arg
;
4647 arg
= list_args
-> next
;
4648 oberon_check_src(ctx
, arg
);
4650 oberon_expr_t
* expr
;
4651 expr
= oberon_hard_cast_expr(ctx
, arg
, typ
-> result
);
4655 static oberon_expr_t
*
4656 oberon_make_len_call(oberon_context_t
* ctx
, int num_args
, oberon_expr_t
* list_args
)
4660 oberon_error(ctx
, "too few arguments");
4665 oberon_error(ctx
, "too mach arguments");
4670 oberon_check_src(ctx
, v
);
4672 if(!oberon_is_array_type(v
-> result
))
4674 oberon_error(ctx
, "expected array");
4680 oberon_expr_t
* num
;
4681 num
= list_args
-> next
;
4682 oberon_check_src(ctx
, num
);
4684 if(!oberon_is_integer_type(num
-> result
))
4686 oberon_error(ctx
, "expected integer");
4688 oberon_check_const(ctx
, num
);
4690 n
= num
-> item
.integer
;
4694 oberon_type_t
* arr
= v
-> result
;
4695 while(arr
-> class == OBERON_TYPE_ARRAY
)
4701 if(n
< 0 || n
> dim
)
4703 oberon_error(ctx
, "not in range 0..%i", dim
- 1);
4706 assert(v
-> is_item
);
4708 oberon_expr_t
* expr
;
4709 expr
= oberon_new_item(MODE_LEN
, ctx
-> int_type
, true);
4710 expr
-> item
.parent
= (oberon_item_t
*) v
;
4711 expr
-> item
.integer
= n
;
4716 oberon_new_const(oberon_context_t
* ctx
, char * name
, oberon_expr_t
* expr
)
4718 oberon_object_t
* constant
;
4719 constant
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_CONST
, true, false, false);
4720 oberon_check_const(ctx
, expr
);
4721 constant
-> value
= (oberon_item_t
*) expr
;
4725 register_default_types(oberon_context_t
* ctx
)
4727 ctx
-> notype_type
= oberon_new_type_ptr(OBERON_TYPE_NOTYPE
);
4728 oberon_generator_init_type(ctx
, ctx
-> notype_type
);
4730 ctx
-> nil_type
= oberon_new_type_ptr(OBERON_TYPE_NIL
);
4731 oberon_generator_init_type(ctx
, ctx
-> nil_type
);
4733 ctx
-> string_type
= oberon_new_type_string(1);
4734 oberon_generator_init_type(ctx
, ctx
-> string_type
);
4736 ctx
-> bool_type
= oberon_new_type_boolean();
4737 oberon_generator_init_type(ctx
, ctx
-> bool_type
);
4739 ctx
-> char_type
= oberon_new_type_char(1);
4740 oberon_generator_init_type(ctx
, ctx
-> char_type
);
4742 ctx
-> byte_type
= oberon_new_type_integer(1);
4743 oberon_generator_init_type(ctx
, ctx
-> byte_type
);
4745 ctx
-> shortint_type
= oberon_new_type_integer(2);
4746 oberon_generator_init_type(ctx
, ctx
-> shortint_type
);
4748 ctx
-> int_type
= oberon_new_type_integer(4);
4749 oberon_generator_init_type(ctx
, ctx
-> int_type
);
4751 ctx
-> longint_type
= oberon_new_type_integer(8);
4752 oberon_generator_init_type(ctx
, ctx
-> longint_type
);
4754 ctx
-> real_type
= oberon_new_type_real(4);
4755 oberon_generator_init_type(ctx
, ctx
-> real_type
);
4757 ctx
-> longreal_type
= oberon_new_type_real(8);
4758 oberon_generator_init_type(ctx
, ctx
-> longreal_type
);
4760 ctx
-> set_type
= oberon_new_type_set(4);
4761 oberon_generator_init_type(ctx
, ctx
-> set_type
);
4763 ctx
-> system_byte_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_BYTE
);
4764 oberon_generator_init_type(ctx
, ctx
-> system_byte_type
);
4766 ctx
-> system_ptr_type
= oberon_new_type_ptr(OBERON_TYPE_SYSTEM_PTR
);
4767 oberon_generator_init_type(ctx
, ctx
-> system_ptr_type
);
4769 /* LONG / SHORT support */
4770 ctx
-> byte_type
-> shorter
= NULL
;
4771 ctx
-> byte_type
-> longer
= ctx
-> shortint_type
;
4773 ctx
-> shortint_type
-> shorter
= ctx
-> byte_type
;
4774 ctx
-> shortint_type
-> longer
= ctx
-> int_type
;
4776 ctx
-> int_type
-> shorter
= ctx
-> shortint_type
;
4777 ctx
-> int_type
-> longer
= ctx
-> longint_type
;
4779 ctx
-> longint_type
-> shorter
= ctx
-> int_type
;
4780 ctx
-> longint_type
-> longer
= NULL
;
4782 ctx
-> real_type
-> shorter
= NULL
;
4783 ctx
-> real_type
-> longer
= ctx
-> longreal_type
;
4785 ctx
-> longreal_type
-> shorter
= ctx
-> real_type
;
4786 ctx
-> longreal_type
-> longer
= NULL
;
4790 oberon_new_intrinsic(oberon_context_t
* ctx
, char * name
, GenerateFuncCallback f
, GenerateProcCallback p
)
4792 oberon_object_t
* proc
;
4793 proc
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_PROC
, true, false, false);
4794 proc
-> type
= oberon_new_type_ptr(OBERON_TYPE_PROCEDURE
);
4795 proc
-> type
-> sysproc
= true;
4796 proc
-> type
-> genfunc
= f
;
4797 proc
-> type
-> genproc
= p
;
4800 static void oberon_new_intrinsic_type(oberon_context_t
* ctx
, char * name
, oberon_type_t
* type
)
4802 oberon_object_t
* id
;
4803 id
= oberon_define_object(ctx
-> decl
, name
, OBERON_CLASS_TYPE
, true, false, false);
4808 oberon_begin_intrinsic_module(oberon_context_t
* ctx
, char * name
, oberon_module_t
** m
)
4810 oberon_scope_t
* module_scope
;
4811 module_scope
= oberon_open_scope(ctx
);
4813 oberon_module_t
* module
;
4814 module
= GC_MALLOC(sizeof *module
);
4815 memset(module
, 0, sizeof *module
);
4816 module
-> name
= name
;
4817 module
-> intrinsic
= true;
4818 module
-> decl
= module_scope
;
4819 module
-> next
= ctx
-> module_list
;
4821 ctx
-> mod
= module
;
4822 ctx
-> module_list
= module
;
4828 oberon_end_intrinsic_module(oberon_context_t
* ctx
, oberon_module_t
* m
)
4830 oberon_close_scope(m
-> decl
);
4836 oberon_create_context(ModuleImportCallback import_module
)
4838 oberon_context_t
* ctx
= GC_MALLOC(sizeof *ctx
);
4839 memset(ctx
, 0, sizeof *ctx
);
4841 oberon_scope_t
* world_scope
;
4842 world_scope
= oberon_open_scope(ctx
);
4843 ctx
-> world_scope
= world_scope
;
4845 ctx
-> import_module
= import_module
;
4847 oberon_generator_init_context(ctx
);
4850 register_default_types(ctx
);
4853 oberon_new_const(ctx
, "TRUE", oberon_make_boolean(ctx
, true));
4854 oberon_new_const(ctx
, "FALSE", oberon_make_boolean(ctx
, false));
4857 oberon_new_intrinsic_type(ctx
, "BOOLEAN", ctx
-> bool_type
);
4858 oberon_new_intrinsic_type(ctx
, "CHAR", ctx
-> char_type
);
4859 oberon_new_intrinsic_type(ctx
, "SHORTINT", ctx
-> byte_type
);
4860 oberon_new_intrinsic_type(ctx
, "INTEGER", ctx
-> shortint_type
);
4861 oberon_new_intrinsic_type(ctx
, "LONGINT", ctx
-> int_type
);
4862 oberon_new_intrinsic_type(ctx
, "HUGEINT", ctx
-> longint_type
);
4863 oberon_new_intrinsic_type(ctx
, "REAL", ctx
-> real_type
);
4864 oberon_new_intrinsic_type(ctx
, "LONGREAL", ctx
-> longreal_type
);
4865 oberon_new_intrinsic_type(ctx
, "SET", ctx
-> set_type
);
4868 oberon_new_intrinsic(ctx
, "ABS", oberon_make_abs_call
, NULL
);
4869 oberon_new_intrinsic(ctx
, "ASH", oberon_make_ash_call
, NULL
);
4870 oberon_new_intrinsic(ctx
, "CAP", oberon_make_cap_call
, NULL
);
4871 oberon_new_intrinsic(ctx
, "CHR", oberon_make_chr_call
, NULL
);
4872 oberon_new_intrinsic(ctx
, "ENTIER", oberon_make_entier_call
, NULL
);
4873 oberon_new_intrinsic(ctx
, "LEN", oberon_make_len_call
, NULL
);
4874 oberon_new_intrinsic(ctx
, "LONG", oberon_make_long_call
, NULL
);
4875 oberon_new_intrinsic(ctx
, "MAX", oberon_make_max_call
, NULL
);
4876 oberon_new_intrinsic(ctx
, "MIN", oberon_make_min_call
, NULL
);
4877 oberon_new_intrinsic(ctx
, "ODD", oberon_make_odd_call
, NULL
);
4878 oberon_new_intrinsic(ctx
, "ORD", oberon_make_ord_call
, NULL
);
4879 oberon_new_intrinsic(ctx
, "SHORT", oberon_make_short_call
, NULL
);
4880 oberon_new_intrinsic(ctx
, "SIZE", oberon_make_size_call
, NULL
);
4883 oberon_new_intrinsic(ctx
, "ASSERT", NULL
, oberon_make_assert_call
);
4884 oberon_new_intrinsic(ctx
, "COPY", NULL
, oberon_make_copy_call
);
4885 oberon_new_intrinsic(ctx
, "DEC", NULL
, oberon_make_dec_call
);
4886 oberon_new_intrinsic(ctx
, "EXCL", NULL
, oberon_make_excl_call
);
4887 oberon_new_intrinsic(ctx
, "HALT", NULL
, oberon_make_halt_call
);
4888 oberon_new_intrinsic(ctx
, "INC", NULL
, oberon_make_inc_call
);
4889 oberon_new_intrinsic(ctx
, "INCL", NULL
, oberon_make_incl_call
);
4890 oberon_new_intrinsic(ctx
, "NEW", NULL
, oberon_make_new_call
);
4893 oberon_begin_intrinsic_module(ctx
, "SYSTEM", &ctx
-> system_module
);
4896 oberon_new_intrinsic_type(ctx
, "BYTE", ctx
-> system_byte_type
);
4897 oberon_new_intrinsic_type(ctx
, "PTR", ctx
-> system_ptr_type
);
4900 oberon_new_intrinsic(ctx
, "CC", oberon_make_cc_call
, NULL
);
4901 oberon_new_intrinsic(ctx
, "LSH", oberon_make_lsh_call
, NULL
);
4902 oberon_new_intrinsic(ctx
, "ROT", oberon_make_rot_call
, NULL
);
4903 oberon_new_intrinsic(ctx
, "VAL", oberon_make_val_call
, NULL
);
4905 oberon_end_intrinsic_module(ctx
, ctx
-> system_module
);
4911 oberon_destroy_context(oberon_context_t
* ctx
)
4913 oberon_generator_destroy_context(ctx
);
4917 oberon_compile_module(oberon_context_t
* ctx
, oberon_scanner_t
* s
)
4919 const char * code
= ctx
-> code
;
4920 int code_index
= ctx
-> code_index
;
4921 oberon_location_t loc
= ctx
-> loc
;
4922 oberon_location_t xloc
= ctx
-> xloc
;
4924 int token
= ctx
-> token
;
4925 char * string
= ctx
-> string
;
4926 int integer
= ctx
-> integer
;
4927 int real
= ctx
-> real
;
4928 bool longmode
= ctx
-> longmode
;
4929 oberon_scope_t
* decl
= ctx
-> decl
;
4930 oberon_module_t
* mod
= ctx
-> mod
;
4932 oberon_scope_t
* module_scope
;
4933 module_scope
= oberon_open_scope(ctx
);
4935 oberon_module_t
* module
;
4936 module
= GC_MALLOC(sizeof *module
);
4937 memset(module
, 0, sizeof *module
);
4938 module
-> decl
= module_scope
;
4939 module
-> next
= ctx
-> module_list
;
4941 ctx
-> mod
= module
;
4942 ctx
-> module_list
= module
;
4944 oberon_init_scaner(ctx
, s
);
4945 oberon_parse_module(ctx
);
4947 module
-> ready
= 1;
4950 ctx
-> code_index
= code_index
;
4954 ctx
-> token
= token
;
4955 ctx
-> string
= string
;
4956 ctx
-> integer
= integer
;
4958 ctx
-> longmode
= longmode
;