-
Notifications
You must be signed in to change notification settings - Fork 2
/
Copy pathcserpent.c
2542 lines (2148 loc) · 75.7 KB
/
cserpent.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
Harris M. Snyder, 2023
This is free and unencumbered software released into the public domain.
This is the main file for CSerpent. You only need this and stb_c_lexer.h
if you are building CSerpent as a standalone program.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <stdint.h>
#include <limits.h>
#define STB_C_LEXER_IMPLEMENTATION
#include "stb_c_lexer.h"
#define MAX_FN_ARGS 40
#define MAX_DIRS 40
#define MAX_FILES 40
enum type_category {
T_UNINITIALIZED = 0,
T_UNKNOWN,
T_CHAR,
T_SHORT,
T_INT,
T_LONG,
T_LLONG,
T_FLOAT,
T_FLOAT16,
T_DOUBLE,
T_LDOUBLE,
T_STRUCT,
T_UNION,
T_VOID,
T_BOOL,
};
const char *type_category_strings[] = {
[T_UNINITIALIZED] = "<uninitialized>",
[T_UNKNOWN] = "<unknown>",
[T_VOID] = "void",
[T_BOOL] = "_Bool",
[T_CHAR] = "char",
[T_SHORT] = "short",
[T_INT] = "int",
[T_LONG] = "long",
[T_LLONG] = "long long",
[T_FLOAT] = "float",
[T_FLOAT16] = "_Float16",
[T_DOUBLE] = "double",
[T_LDOUBLE] = "long double",
[T_STRUCT] = "struct",
[T_UNION] = "union",
};
typedef struct type {
enum type_category category;
short explicit_signed : 1;
short is_unsigned : 1;
short is_complex : 1;
short is_imaginary : 1;
short is_const : 1;
short is_restrict : 1;
short is_volatile : 1;
short is_pointer : 1;
short is_pointer_const : 1;
short is_pointer_restrict : 1;
short is_pointer_volatile : 1;
} Type;
typedef struct {
char *name;
Type type;
} Symbol;
typedef struct {
Type type;
char suffix;
char found;
} VariantSuffix;
typedef struct { // lexer token
int toktype; // this will be one of the enum values in stb_c_lexer
int string_len;
union {
double real_number;
long long int_number;
char * string;
};
} Token;
#include <setjmp.h>
typedef struct
{
int verbose;
int float16_support;
int disable_declarations;
int enable_addresses_for_arrays;
int enable_bytes_for_arrays;
const char * modulename;
const char * filename;
const char * preprocessor;
int disable_pp;
int generic;
int generic_keep_trailing_underscore;
int ndirs;
const char *dirs[MAX_DIRS];
struct {
const char *fn;
short active;
short argno;
} error_handling;
struct {
const char *files[MAX_FILES];
int nfiles;
} manual_include;
FILE *ostream;
FILE *estream;
FILE *istream;
FILE *volatile * open_file;
jmp_buf *jmp;
} CSerpentArgs;
enum {
MAX_STRINGS_EXP=15,
MAX_STRING_HEAP=(1<<22),
MAX_SYMBOLS=10000,
};
typedef struct {
// String table
int num_strings, heap_size;
char heap[MAX_STRING_HEAP];
char *table[1<<MAX_STRINGS_EXP];
// Symbol table
int nsym;
Symbol symbols[MAX_SYMBOLS];
} StorageBuffers;
typedef struct {
Token *tokens;
Token *tokens_end;
Token *tokens_first;
StorageBuffers *storage;
CSerpentArgs args;
} ParseCtx;
/*
==========================================================
Helper functions for parsing and handling errors
==========================================================
*/
#define ssizeof(x) ((int64_t)sizeof(x))
#define COUNT_ARRAY(x) ((int64_t)(sizeof(x)/sizeof(x[0])))
#define RESTORE(p) (*p = p_saved);
#define SAVE(p) ParseCtx p_saved = *p;
#define MIN(a,b) ((a)<(b)?(a):(b))
#define MAX(a,b) ((a)>(b)?(a):(b))
#ifdef CSERPENT_DISABLE_ASSERT
# define assert(c)
#else
# if defined(_MSC_VER)
# define assert(c) if(!(c)){__debugbreak();}
# else
# if defined(__GNUC__) || defined(__clang__)
# define assert(c) if(!(c)){__builtin_trap();}
# else
# define assert(c) if(!(c)){*(volatile int*)0=0;}
# endif
# endif
#endif
static int
repr_type(int bufsz, char buf[], Type type)
{
char *is_signed = type.explicit_signed ? "signed " : "";
char *is_unsigned = type.is_unsigned ? "unsigned " : "";
char *is_complex = type.is_complex ? "_Complex " : "";
char *is_imaginary = type.is_imaginary ? "_Imaginary " : "";
char *is_const = type.is_const ? "const " : "";
char *is_restrict = type.is_restrict ? "restrict " : "";
char *is_volatile = type.is_volatile ? "volatile " : "";
char *is_pointer = type.is_pointer ? "*" : "";
char *is_pointer_const = type.is_pointer_const ? "const " : "";
char *is_pointer_restrict = type.is_pointer_restrict ? "restrict " : "";
char *is_pointer_volatile = type.is_pointer_volatile ? "volatile " : "";
return snprintf(buf, bufsz, "%s%s%s %s%s%s%s%s%s%s%s%s",
is_signed, is_unsigned, type_category_strings[type.category], is_complex, is_imaginary,
is_const, is_restrict, is_volatile, is_pointer,
is_pointer_const, is_pointer_restrict, is_pointer_volatile);
}
static int
repr_symbol(int bufsz, char buf[], Symbol s)
{
long x = snprintf(buf, bufsz, "%s := ", s.name);
bufsz -= x;
buf += x;
// TODO bug: make sure we haven't already overflown the buffer.
return x + repr_type(bufsz, buf, s.type);
}
static void
repr_token(int bufsz, char buf[], Token t)
{
switch (t.toktype) {
case CLEX_id : snprintf(buf, bufsz,"%s", t.string); break;
case CLEX_eq : snprintf(buf, bufsz,"=="); break;
case CLEX_noteq : snprintf(buf, bufsz,"!="); break;
case CLEX_lesseq : snprintf(buf, bufsz,"<="); break;
case CLEX_greatereq : snprintf(buf, bufsz,">="); break;
case CLEX_andand : snprintf(buf, bufsz,"&&"); break;
case CLEX_oror : snprintf(buf, bufsz,"||"); break;
case CLEX_shl : snprintf(buf, bufsz,"<<"); break;
case CLEX_shr : snprintf(buf, bufsz,">>"); break;
case CLEX_plusplus : snprintf(buf, bufsz,"++"); break;
case CLEX_minusminus: snprintf(buf, bufsz,"--"); break;
case CLEX_arrow : snprintf(buf, bufsz,"->"); break;
case CLEX_andeq : snprintf(buf, bufsz,"&="); break;
case CLEX_oreq : snprintf(buf, bufsz,"|="); break;
case CLEX_xoreq : snprintf(buf, bufsz,"^="); break;
case CLEX_pluseq : snprintf(buf, bufsz,"+="); break;
case CLEX_minuseq : snprintf(buf, bufsz,"-="); break;
case CLEX_muleq : snprintf(buf, bufsz,"*="); break;
case CLEX_diveq : snprintf(buf, bufsz,"/="); break;
case CLEX_modeq : snprintf(buf, bufsz,"%%="); break;
case CLEX_shleq : snprintf(buf, bufsz,"<<="); break;
case CLEX_shreq : snprintf(buf, bufsz,">>="); break;
case CLEX_eqarrow : snprintf(buf, bufsz,"=>"); break;
case CLEX_dqstring : snprintf(buf, bufsz,"\"%s\"", t.string); break;
case CLEX_sqstring : snprintf(buf, bufsz,"'\"%s\"'", t.string); break;
case CLEX_charlit : snprintf(buf, bufsz,"'%s'", t.string); break;
case CLEX_intlit : snprintf(buf, bufsz,"#%lli", t.int_number); break;
case CLEX_floatlit : snprintf(buf, bufsz,"%g", t.real_number); break;
default:
if (t.toktype >= 0 && t.toktype < 256)
snprintf(buf, bufsz,"%c", (int) t.toktype);
else {
snprintf(buf, bufsz,"<<<UNKNOWN TOKEN %ld >>>\n", t.toktype);
}
break;
}
}
static void
dump_context(FILE *f, ParseCtx *p)
{
long long before = MIN(p->tokens - p->tokens_first, 20);
long long after = MIN(p->tokens_end - p->tokens, 20);
for (int i = -before; i < after; i++)
{
char buf[1000] = {0};
repr_token(sizeof(buf), buf, p->tokens[i]);
if( i == 0 )
fprintf(f, ">>HERE<< %s ", buf);
else
fprintf(f, "%s ", buf);
}
fprintf(f,"\n");
}
static _Noreturn void
terminate(CSerpentArgs *args) {
(void) args;
longjmp(*args->jmp, 1);
}
static _Noreturn void
die (ParseCtx *p, const char * fmt, ...)
{
FILE *where = p ? p->args.estream : stderr;
va_list va;
va_start(va, fmt);
vfprintf(where, fmt, va);
va_end(va);
fprintf(where, "\n");
if(p) dump_context(where, p);
terminate(&p->args);
}
static _Noreturn void
die2 (CSerpentArgs args, const char * fmt, ...)
{
va_list va;
va_start(va, fmt);
vfprintf(args.estream, fmt, va);
va_end(va);
fprintf(args.estream, "\n");
terminate(&args);
}
static uint64_t
hash (char *s, int32_t len)
{
uint64_t h = 0x100;
for (int32_t i = 0; i < len; i++) {
h ^= s[i] & 255;
h *= 1111111111111111111;
}
return h ^ h>>32;
}
static int32_t
ht_lookup(uint64_t hash, int exp, int32_t idx)
{
uint32_t mask = ((uint32_t)1 << exp) - 1;
uint32_t step = (hash >> (64 - exp)) | 1;
return (idx + step) & mask;
}
static char *
intern_string(CSerpentArgs args, StorageBuffers *st, char *key, int keylen)
{
if (keylen == 0) keylen = strlen(key);
uint64_t h = hash(key, keylen+1);
for (int32_t i = h;;) {
i = ht_lookup(h, MAX_STRINGS_EXP, i);
if (!st->table[i]) {
// empty, insert here
if (st->num_strings+1 == COUNT_ARRAY(st->table)/2)
die2(args, "intern: string table full");
if (st->heap_size + keylen + 1 >= MAX_STRING_HEAP)
die2(args, "intern: string heap full");
st->num_strings++;
st->table[i] = st->heap+st->heap_size;
memcpy(st->table[i], key, keylen);
st->heap_size += keylen;
st->heap[st->heap_size++] = 0;
return st->table[i];
} else if (!strcmp(st->table[i], key)) {
// found, return canonical instance
return st->table[i];
}
}
}
static int
xatoi (CSerpentArgs args, const char *x, int *nchars_read)
{
const char * save = x;
int sign = 1;
int n = 0;
int v = 0;
if(x[0] == '-') {sign = -1; x++;}
if(x[0] == '+') {sign = 1; x++;}
while (x[0] && x[0] >= 48 && x[0] <= 48+9)
{
int digit = x[0] - 48;
if (INT_MAX / 10 < v) goto overflow;
v *= 10;
if (INT_MAX - digit < v) goto overflow;
v += digit;
n++;
x++;
}
if (!n) die2(args, "couldn't parse '%6s' as an integer", save);
if (nchars_read) *nchars_read = x-save;
return v * sign;
overflow:
die2(args, "integer overflow when trying to convert '%14s'", save);
}
static Symbol *
add_symbol(CSerpentArgs args, StorageBuffers *storage, Symbol s)
{
if(storage->nsym == COUNT_ARRAY(storage->symbols)) die2(args, "symbol table full");
s.name = intern_string(args, storage, s.name, 0);
storage->symbols[storage->nsym] = s;
return &storage->symbols[storage->nsym++];
}
static Symbol *
get_symbol(StorageBuffers *storage, char *name)
{
for(int i = 0; i < storage->nsym; i++)
if(!strcmp(name,storage->symbols[i].name)) return &storage->symbols[i];
return 0;
}
static Symbol *
get_symbol_or_die(CSerpentArgs args, StorageBuffers *storage, char *name)
{
Symbol *s = get_symbol(storage, name);
if(!s) die2(args, "Unknown type: %s", name);
return s;
}
static void
clear_symbols(StorageBuffers *storage)
{
storage->nsym = 0;
}
static int
modify_type_pointer(ParseCtx *p, Type *type)
{
assert(type);
if (type->is_pointer)
return 0;
type->is_pointer = 1;
return 1;
}
static void
modify_type_const(ParseCtx *p, Type *type)
{
(void) p;
assert(type);
if(type->is_pointer) type->is_pointer_const = 1;
else type->is_const = 1;
}
static void
modify_type_restrict(ParseCtx *p, Type *type)
{
(void) p;
assert(type);
if(type->is_pointer) type->is_pointer_restrict = 1;
else type->is_restrict = 1;
}
static void
modify_type_volatile(ParseCtx *p, Type *type)
{
(void) p;
assert(type);
if(type->is_pointer) type->is_pointer_volatile = 1;
else type->is_volatile = 1;
}
static void
modify_type_struct(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->category == T_UNINITIALIZED) type->category = T_STRUCT;
else die(p, "'struct' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_union(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->category == T_UNINITIALIZED) type->category = T_UNION;
else die(p, "'union' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_void(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_unsigned) die(p, "'void' does not make sense with 'unsigned'");
if(type->explicit_signed) die(p, "'void' does not make sense with 'signed'");
if(type->is_imaginary) die(p, "'void' does not make sense with '_Imaginary'");
if(type->is_complex) die(p, "'void' does not make sense with '_Complex'");
if(type->category == T_UNINITIALIZED) type->category = T_VOID;
else die(p, "'void' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_char(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_imaginary) die(p, "'char' does not make sense with '_Imaginary'");
if(type->is_complex) die(p, "'char' does not make sense with '_Complex'");
if(type->category == T_UNINITIALIZED) type->category = T_CHAR;
else die(p, "'char' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_short(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_imaginary) die(p, "'short' does not make sense with '_Imaginary'");
if(type->is_complex) die(p, "'short' does not make sense with '_Complex'");
if(type->category == T_UNINITIALIZED || type->category == T_INT) type->category = T_SHORT;
else die(p, "'short' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_int(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_imaginary) die(p, "'int' does not make sense with '_Imaginary'");
if(type->is_complex) die(p, "'int' does not make sense with '_Complex'");
if(type->category == T_SHORT
|| type->category == T_LONG
|| type->category == T_LLONG ) return;
if(type->category == T_UNINITIALIZED) type->category = T_INT;
else die(p, "'int' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_long(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->category == T_UNINITIALIZED) type->category = T_LONG;
else if (type->category == T_INT) type->category = T_LONG;
else if (type->category == T_LONG) type->category = T_LLONG;
else if (type->category == T_DOUBLE) type->category = T_LDOUBLE;
else die(p, "'long' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_float16(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_unsigned) die(p, "'_Float16' does not make sense with 'unsigned'");
if(type->explicit_signed) die(p, "'_Float16' does not make sense with 'signed'");
if(type->category == T_UNINITIALIZED) type->category = T_FLOAT16;
else die(p, "'_Float16' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_float(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_unsigned) die(p, "'float' does not make sense with 'unsigned'");
if(type->explicit_signed) die(p, "'float' does not make sense with 'signed'");
if(type->category == T_UNINITIALIZED) type->category = T_FLOAT;
else die(p, "'float' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_double(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_unsigned) die(p, "'double' does not make sense with 'unsigned'");
if(type->explicit_signed) die(p, "'double' does not make sense with 'signed'");
if(type->category == T_UNINITIALIZED) type->category = T_DOUBLE;
else if(type->category == T_LONG) type->category = T_LDOUBLE;
else die(p, "'double' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_signed(ParseCtx *p, Type *type)
{
assert(type);
if(type->category >= T_FLOAT) die(p, "'signed' doesn't make sense with non-integer types");
if(type->is_unsigned) die(p, "'signed' doesn't make sense with 'unsigned'");
type->explicit_signed = 1;
}
static void
modify_type_unsigned(ParseCtx *p, Type *type)
{
assert(type);
if(type->category >= T_FLOAT) die(p, "'unsigned' doesn't make sense with non-integer types");
if(type->is_unsigned) die(p, "'unsigned' doesn't make sense with 'signed'");
type->is_unsigned = 1;
}
static void
modify_type_bool(ParseCtx *p, Type *type)
{
assert(type);
if(type->category == T_UNKNOWN) return;
if(type->is_unsigned) die(p, "'_Bool' does not make sense with 'unsigned'");
if(type->explicit_signed) die(p, "'_Bool' does not make sense with 'signed'");
if(type->category == T_UNINITIALIZED) type->category = T_BOOL;
else die(p, "'_Bool' does not make sense with '%s'", type_category_strings[type->category]);
}
static void
modify_type_complex(ParseCtx *p, Type *type)
{
assert(type);
if(type->category >= T_CHAR && type->category < T_FLOAT) die(p, "'_Complex' doesn't make sense with integer types");
if(type->is_imaginary) die(p, "'_Complex' doesn't make sense with '_Imaginary'");
type->is_complex = 1;
// TODO check against struct/union?
}
static void
modify_type_imaginary(ParseCtx *p, Type *type)
{
assert(type);
if(type->category >= T_CHAR && type->category < T_FLOAT) die(p, "'_Imaginary' doesn't make sense with integer types");
if(type->is_complex) die(p, "'_Imaginary' doesn't make sense with '_Complex'");
type->is_imaginary = 1;
// TODO check against struct/union?
}
static int
compare_types_equal(Type a, Type b, int compare_pointer, int compare_const, int compare_volatile, int compare_restrict)
{
if(a.category != b.category) return 0;
if(a.category == T_FLOAT || a.category == T_FLOAT16 || a.category == T_DOUBLE || a.category == T_LDOUBLE) {
if (a.is_complex != b.is_complex) return 0;
if (a.is_imaginary != b.is_imaginary) return 0;
} else if (a.category >= T_CHAR && a.category <= T_LLONG) {
if (a.is_unsigned != b.is_unsigned) return 0;
}
if (compare_const) if (a.is_const != b.is_const) return 0;
if (compare_volatile) if (a.is_volatile != b.is_volatile) return 0;
if (compare_restrict) if (a.is_restrict != b.is_restrict) return 0;
if (compare_pointer) {
if (a.is_pointer != b.is_pointer) return 0;
if (compare_const) if (a.is_pointer_const != b.is_pointer_const) return 0;
if (compare_volatile) if (a.is_pointer_volatile != b.is_pointer_volatile) return 0;
if (compare_restrict) if (a.is_pointer_restrict != b.is_pointer_restrict) return 0;
}
return 1;
}
/*
==========================================================
Templates
==========================================================
*/
/*
==========================================================
Wrapper generation
==========================================================
*/
static void
emit_module(
CSerpentArgs args,
int n_fnames,
const char *fnames[],
_Bool fname_needs_strip_underscore[],
int num_enum_consts,
char *enum_consts[])
{
if(!args.modulename) return;
fprintf(args.ostream, "static PyMethodDef module_functions[] = { \n");
for (int i = 0; i < n_fnames; i++) {
char name[500] = {0};
int len = snprintf(name, sizeof(name), "%s", fnames[i]);
assert(ssizeof(name)-1 > len);
if(fname_needs_strip_underscore[i]) name[len-1] = 0;
fprintf(args.ostream, "{\"%s\", (PyCFunction) wrap_%s, METH_VARARGS|METH_KEYWORDS, \"\"},\n",
name, fnames[i]);
}
fprintf(args.ostream,
" { NULL, NULL, 0, NULL } \n"
"}; \n"
"\n\n"
"static const char module_name[] = \"%s\"; \n"
"\n"
"static struct PyModuleDef module_def = { \n"
" PyModuleDef_HEAD_INIT, \n"
" module_name, /* m_name */ \n"
" NULL, /* m_doc */ \n"
" -1, /* m_size */ \n"
" module_functions, /* m_methods */ \n"
" NULL, /* m_reload */ \n"
" NULL, /* m_traverse */ \n"
" NULL, /* m_clear */ \n"
" NULL, /* m_free */ \n"
"}; \n"
" \n"
"static PyObject *module_init(void) \n"
"{ \n"
" PyObject *m; \n"
" \n"
" // Import numpy arrays \n"
" import_array1(NULL); \n"
" \n"
" // Register the module \n"
" if (!(m = PyModule_Create(&module_def))) \n"
" return NULL; \n"
" \n", args.modulename);
for(int e = 0; e < num_enum_consts; e++) {
fprintf(args.ostream, " PyModule_AddIntConstant(m, \"%s\", %s);\n", enum_consts[e], enum_consts[e]);
}
fprintf(args.ostream,
" \n"
" return m; \n"
"} \n"
" \n"
"PyMODINIT_FUNC PyInit_%s (void) \n"
"{ \n"
" return module_init(); \n"
"} \n", args.modulename);
}
static void
emit_preamble(CSerpentArgs args)
{
(void) args;
char * f16_cplusplus =
args.float16_support ?
"template<> struct CSERPENT_C2NPY_struct<_Float16> { static constexpr int value = NPY_FLOAT16; };" :
"";
char * f16_c =
args.float16_support ?
"_Float16: NPY_FLOAT16," :
"";
fprintf(args.ostream,
"#define NPY_NO_DEPRECATED_API NPY_1_8_API_VERSION \n"
"#define PY_ARRAY_UNIQUE_SYMBOL SHARED_ARRAY_ARRAY_API \n"
"#include <Python.h> \n"
"#include <stddef.h> \n"
"#include <numpy/arrayobject.h> \n"
"#ifdef __cplusplus \n"
"template<typename T> struct CSERPENT_C2NPY_struct; \n"
"template<> struct CSERPENT_C2NPY_struct<signed char> { static constexpr int value = NPY_BYTE; }; \n"
"template<> struct CSERPENT_C2NPY_struct<short> { static constexpr int value = NPY_SHORT; }; \n"
"template<> struct CSERPENT_C2NPY_struct<int> { static constexpr int value = NPY_INT; }; \n"
"template<> struct CSERPENT_C2NPY_struct<long> { static constexpr int value = NPY_LONG; }; \n"
"template<> struct CSERPENT_C2NPY_struct<long long> { static constexpr int value = NPY_LONGLONG; }; \n"
"template<> struct CSERPENT_C2NPY_struct<unsigned char> { static constexpr int value = NPY_UBYTE; }; \n"
"template<> struct CSERPENT_C2NPY_struct<unsigned short> { static constexpr int value = NPY_USHORT; }; \n"
"template<> struct CSERPENT_C2NPY_struct<unsigned int> { static constexpr int value = NPY_UINT; }; \n"
"template<> struct CSERPENT_C2NPY_struct<unsigned long> { static constexpr int value = NPY_ULONG; }; \n"
"template<> struct CSERPENT_C2NPY_struct<unsigned long long> { static constexpr int value = NPY_ULONGLONG; }; \n"
"template<> struct CSERPENT_C2NPY_struct<float> { static constexpr int value = NPY_FLOAT; }; \n"
"%s\n"
"template<> struct CSERPENT_C2NPY_struct<double> { static constexpr int value = NPY_DOUBLE; }; \n"
"#define C2NPY(type) CSERPENT_C2NPY_struct<type>::value \n"
"#else \n"
"#define C2NPY(type) _Generic((type){0}, \\\n"
" signed char: NPY_BYTE, \\\n"
" short: NPY_SHORT, \\\n"
" int: NPY_INT, \\\n"
" long: NPY_LONG, \\\n"
" long long: NPY_LONGLONG, \\\n"
" unsigned char: NPY_UBYTE, \\\n"
" unsigned short: NPY_USHORT, \\\n"
" unsigned int: NPY_UINT, \\\n"
" unsigned long: NPY_ULONG, \\\n"
" unsigned long long: NPY_ULONGLONG, \\\n"
" float: NPY_FLOAT, \\\n"
" %s\\\n"
" double: NPY_DOUBLE, \\\n"
" _Complex float: NPY_CFLOAT, \\\n"
" _Complex double: NPY_CDOUBLE \\\n"
" )\n"
"#endif \n\n",
f16_cplusplus,
f16_c);
}
static int
is_string(Type t)
{
return t.category == T_CHAR
&& !t.explicit_signed
&& !t.is_unsigned
&& t.is_pointer;
}
static int
is_voidptr(Type t)
{
return t.category == T_VOID
&& t.is_pointer;
}
static int
is_plainvoid(Type t)
{
Type zero = {0};
if(t.category == T_VOID){
t.category = 0;
return !memcmp(&t,&zero,sizeof(t));
}
return 0;
}
static int
is_array(Type t)
{
return !is_string(t)
&& !is_voidptr(t)
&& t.is_pointer;
}
static Type
basetype(Type t)
{
t.is_pointer = 0;
t.is_const = 0;
t.is_volatile = 0;
t.is_restrict = 0;
t.is_pointer_const = 0;
t.is_pointer_volatile = 0;
t.is_pointer_restrict = 0;
return t;
}
static void
emit_exceptionhandling(const char *fn, CSerpentArgs args, int n_fnargs, Symbol fnargs[])
{
if(args.error_handling.active) {
if(args.error_handling.fn) {
assert(args.error_handling.argno >= 0);
if(args.error_handling.argno > n_fnargs)
die2(args, "Error wrapping function '%s' in file '%s': "
"flag -e,%i,%s was specified, but function only has "
"%i arguments",
fn, args.filename,
args.error_handling.argno, args.error_handling.fn,
n_fnargs);
char *exnarg = args.error_handling.argno == 0
? "rtn"
: fnargs[args.error_handling.argno-1].name;
fprintf(args.ostream, " const char *_exn = %s(%s); \n", args.error_handling.fn, exnarg);
fprintf(args.ostream, " if(_exn) { \n");
fprintf(args.ostream, " PyErr_SetString(PyExc_RuntimeError, _exn); \n");
fprintf(args.ostream, " return 0; \n");
fprintf(args.ostream, " } \n");
} else {
assert(args.error_handling.argno == 0);
fprintf(args.ostream, " if(rtn) { \n");
fprintf(args.ostream, " PyErr_SetString(PyExc_RuntimeError, rtn); \n");
fprintf(args.ostream, " return 0; \n");
fprintf(args.ostream, " } \n");
}
}
}
static void
emit_call(const char *fn, CSerpentArgs args, int n_fnargs, Symbol fnargs[])
{
fprintf(args.ostream, "%s (", fn);
for(int i = 0; i < n_fnargs; i++)
{
char *sep = i ? ", " : "";
if (is_array(fnargs[i].type)) {
char buffer[200] = {0};
if(200 <= repr_type(200, buffer, fnargs[i].type))
die2(args, "bug: buffer overflow / type name too long");
fprintf(args.ostream, "%s(%s)%s_data", sep, buffer, fnargs[i].name);
} else {
fprintf(args.ostream, "%s%s", sep, fnargs[i].name);
}
}
fprintf(args.ostream, ");\n");
}
static int
emit_py_buildvalue_fmt_char(CSerpentArgs args, Type t)
{
if (t.category == T_CHAR) fprintf(args.ostream, "b");
else if (t.category == T_DOUBLE && !t.is_complex && !t.is_imaginary) fprintf(args.ostream, "d");
else if (t.category == T_FLOAT && !t.is_complex && !t.is_imaginary) fprintf(args.ostream, "f");
else if (t.category == T_SHORT && !t.is_unsigned) fprintf(args.ostream, "h");
else if (t.category == T_INT && !t.is_unsigned) fprintf(args.ostream, "i");
else if (t.category == T_LONG && !t.is_unsigned) fprintf(args.ostream, "l");
else if (t.category == T_LLONG && !t.is_unsigned) fprintf(args.ostream, "L");
else if (t.category == T_SHORT) fprintf(args.ostream, "H");
else if (t.category == T_INT) fprintf(args.ostream, "I");
else if (t.category == T_LONG) fprintf(args.ostream, "k");
else if (t.category == T_LLONG) fprintf(args.ostream, "K");
else if (t.category == T_BOOL) fprintf(args.ostream, "p");
else return 0;
return 1;
}
static void
emit_wrapper (const char *fn, CSerpentArgs args, int n_fnargs, Symbol fnargs[], Type rtntype)
{
assert(n_fnargs >= 0);
// declaration for function to be wrapped
if(!args.disable_declarations) {
char buf[200] = {0};
assert(ssizeof(buf) > repr_type(sizeof(buf), buf, rtntype));
fprintf(args.ostream, "%s %s (", buf, fn);
if (n_fnargs == 0)
fprintf(args.ostream, "void");
else for(int i = 0; i < n_fnargs; i++)
{
memset(buf,0,sizeof(buf));
assert(ssizeof(buf) > repr_type(sizeof(buf), buf, fnargs[i].type));
char * sep = i ? ", " : "";
fprintf(args.ostream, "%s%s %s", sep, buf, fnargs[i].name);
}
fprintf(args.ostream, ");\n");
}
// start of wrapper definition
fprintf(args.ostream, "PyObject * wrap_%s (PyObject *self, PyObject *args, PyObject *kwds)\n{\n",fn);
fprintf(args.ostream, " (void) self;\n");
if(n_fnargs) {
// keyword name list
fprintf(args.ostream, " static char *kwlist[] = {");
for(int i = 0; i < n_fnargs; i++)
fprintf(args.ostream, "\n (char*)\"%s\",", fnargs[i].name);
fprintf(args.ostream, "0};\n");
// declare a C variable for each argument
for(int i = 0; i < n_fnargs; i++) {
Symbol arg = fnargs[i];
if (is_string(arg.type)) {
fprintf(args.ostream, " char * %s = 0;\n", arg.name);
}
else if (is_voidptr(arg.type)) {
fprintf(args.ostream, " unsigned long long %s_ull = 0;\n", arg.name);
fprintf(args.ostream, " void * %s = 0;\n", arg.name);
}
else if (is_array(arg.type)) {
fprintf(args.ostream, " PyObject *%s_obj = NULL;\n", arg.name);
fprintf(args.ostream, " void *%s_data = NULL;\n", arg.name);
}
else if (arg.type.category == T_BOOL) {
fprintf(args.ostream, " int %s = 0;\n", arg.name);
}
else {
char buf[200] = {0};
assert(ssizeof(buf) > repr_type(sizeof(buf), buf, arg.type));
fprintf(args.ostream, " %s %s = {0};\n", buf, arg.name);