forked from mmp/pbrt-v3
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathrply.cpp
1612 lines (1487 loc) · 54.5 KB
/
rply.cpp
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
// ext/rply.cpp*
/* ----------------------------------------------------------------------
* RPly library, read/write PLY files
* Diego Nehab, IMPA
* http://www.impa.br/~diego/software/rply
*
* This library is distributed under the MIT License. See notice
* at the end of this file.
* ---------------------------------------------------------------------- */
#include <stdio.h>
#include <ctype.h>
#include <assert.h>
#include <string.h>
#include <limits.h>
#include <float.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stddef.h>
#include "ext/rply.h"
/* ----------------------------------------------------------------------
* Make sure we get our integer types right
* ---------------------------------------------------------------------- */
#if defined(_MSC_VER) && (_MSC_VER < 1600)
/* C99 stdint.h only supported in MSVC++ 10.0 and up */
typedef __int8 t_ply_int8;
typedef __int16 t_ply_int16;
typedef __int32 t_ply_int32;
typedef unsigned __int8 t_ply_uint8;
typedef unsigned __int16 t_ply_uint16;
typedef unsigned __int32 t_ply_uint32;
#define PLY_INT8_MAX (127)
#define PLY_INT8_MIN (-PLY_INT8_MAX - 1)
#define PLY_INT16_MAX (32767)
#define PLY_INT16_MIN (-PLY_INT16_MAX - 1)
#define PLY_INT32_MAX (2147483647)
#define PLY_INT32_MIN (-PLY_INT32_MAX - 1)
#define PLY_UINT8_MAX (255)
#define PLY_UINT16_MAX (65535)
#define PLY_UINT32_MAX (4294967295)
#else
#define __STDC_LIMIT_MACROS
#include <stdint.h>
typedef int8_t t_ply_int8;
typedef int16_t t_ply_int16;
typedef int32_t t_ply_int32;
typedef uint8_t t_ply_uint8;
typedef uint16_t t_ply_uint16;
typedef uint32_t t_ply_uint32;
#define PLY_INT8_MIN INT8_MIN
#define PLY_INT8_MAX INT8_MAX
#define PLY_INT16_MIN INT16_MIN
#define PLY_INT16_MAX INT16_MAX
#define PLY_INT32_MIN INT32_MIN
#define PLY_INT32_MAX INT32_MAX
#define PLY_UINT8_MAX UINT8_MAX
#define PLY_UINT16_MAX UINT16_MAX
#define PLY_UINT32_MAX UINT32_MAX
#endif
/* ----------------------------------------------------------------------
* Constants
* ---------------------------------------------------------------------- */
#define WORDSIZE 256
#define LINESIZE 1024
#define BUFFERSIZE (8 * 1024)
typedef enum e_ply_io_mode_ { PLY_READ, PLY_WRITE } e_ply_io_mode;
static const char *const ply_storage_mode_list[] = {
"binary_big_endian", "binary_little_endian", "ascii",
NULL}; /* order matches e_ply_storage_mode enum */
static const char *const ply_type_list[] = {
"int8", "uint8", "int16", "uint16", "int32", "uint32", "float32",
"float64", "char", "uchar", "short", "ushort", "int", "uint",
"float", "double", "list", NULL}; /* order matches e_ply_type enum */
/* ----------------------------------------------------------------------
* Property reading callback argument
*
* element: name of element being processed
* property: name of property being processed
* nelements: number of elements of this kind in file
* instance_index: index current element of this kind being processed
* length: number of values in current list (or 1 for scalars)
* value_index: index of current value int this list (or 0 for scalars)
* value: value of property
* pdata/idata: user data defined with ply_set_cb
*
* Returns handle to PLY file if succesful, NULL otherwise.
* ---------------------------------------------------------------------- */
typedef struct t_ply_argument_ {
p_ply_element element;
long instance_index;
p_ply_property property;
long length, value_index;
double value;
void *pdata;
long idata;
} t_ply_argument;
/* ----------------------------------------------------------------------
* Property information
*
* name: name of this property
* type: type of this property (list or type of scalar value)
* length_type, value_type: type of list property count and values
* read_cb: function to be called when this property is called
*
* Returns 1 if should continue processing file, 0 if should abort.
* ---------------------------------------------------------------------- */
typedef struct t_ply_property_ {
char name[WORDSIZE];
e_ply_type type, value_type, length_type;
p_ply_read_cb read_cb;
void *pdata;
long idata;
} t_ply_property;
/* ----------------------------------------------------------------------
* Element information
*
* name: name of this property
* ninstances: number of elements of this type in file
* property: property descriptions for this element
* nproperty: number of properties in this element
*
* Returns 1 if should continue processing file, 0 if should abort.
* ---------------------------------------------------------------------- */
typedef struct t_ply_element_ {
char name[WORDSIZE];
long ninstances;
p_ply_property property;
long nproperties;
} t_ply_element;
/* ----------------------------------------------------------------------
* Input/output driver
*
* Depending on file mode, different functions are used to read/write
* property fields. The drivers make it transparent to read/write in ascii,
* big endian or little endian cases.
* ---------------------------------------------------------------------- */
typedef int (*p_ply_ihandler)(p_ply ply, double *value);
typedef int (*p_ply_ichunk)(p_ply ply, void *anydata, size_t size);
typedef struct t_ply_idriver_ {
p_ply_ihandler ihandler[16];
p_ply_ichunk ichunk;
const char *name;
} t_ply_idriver;
typedef t_ply_idriver *p_ply_idriver;
typedef int (*p_ply_ohandler)(p_ply ply, double value);
typedef int (*p_ply_ochunk)(p_ply ply, void *anydata, size_t size);
typedef struct t_ply_odriver_ {
p_ply_ohandler ohandler[16];
p_ply_ochunk ochunk;
const char *name;
} t_ply_odriver;
typedef t_ply_odriver *p_ply_odriver;
/* ----------------------------------------------------------------------
* Ply file handle.
*
* io_mode: read or write (from e_ply_io_mode)
* storage_mode: mode of file associated with handle (from e_ply_storage_mode)
* element: elements description for this file
* nelement: number of different elements in file
* comment: comments for this file
* ncomments: number of comments in file
* obj_info: obj_info items for this file
* nobj_infos: number of obj_info items in file
* fp: file pointer associated with ply file
* rn: skip extra char after end_header?
* buffer: last word/chunck of data read from ply file
* buffer_first, buffer_last: interval of untouched good data in buffer
* buffer_token: start of parsed token (line or word) in buffer
* idriver, odriver: input driver used to get property fields from file
* argument: storage space for callback arguments
* welement, wproperty: element/property type being written
* winstance_index: index of instance of current element being written
* wvalue_index: index of list property value being written
* wlength: number of values in list property being written
* error_cb: error callback
* pdata/idata: user data defined with ply_open/ply_create
* ---------------------------------------------------------------------- */
typedef struct t_ply_ {
e_ply_io_mode io_mode;
e_ply_storage_mode storage_mode;
p_ply_element element;
long nelements;
char *comment;
long ncomments;
char *obj_info;
long nobj_infos;
FILE *fp;
int rn;
char buffer[BUFFERSIZE];
size_t buffer_first, buffer_token, buffer_last;
p_ply_idriver idriver;
p_ply_odriver odriver;
t_ply_argument argument;
long welement, wproperty;
long winstance_index, wvalue_index, wlength;
p_ply_error_cb error_cb;
void *pdata;
long idata;
} t_ply;
/* ----------------------------------------------------------------------
* I/O functions and drivers
* ---------------------------------------------------------------------- */
namespace {
extern t_ply_idriver ply_idriver_ascii;
extern t_ply_idriver ply_idriver_binary;
extern t_ply_idriver ply_idriver_binary_reverse;
extern t_ply_odriver ply_odriver_ascii;
extern t_ply_odriver ply_odriver_binary;
extern t_ply_odriver ply_odriver_binary_reverse;
};
static int ply_read_word(p_ply ply);
static int ply_check_word(p_ply ply);
static void ply_finish_word(p_ply ply, size_t size);
static int ply_read_line(p_ply ply);
static int ply_check_line(p_ply ply);
static int ply_read_chunk(p_ply ply, void *anybuffer, size_t size);
static int ply_read_chunk_reverse(p_ply ply, void *anybuffer, size_t size);
static int ply_write_chunk(p_ply ply, void *anybuffer, size_t size);
static int ply_write_chunk_reverse(p_ply ply, void *anybuffer, size_t size);
static void ply_reverse(void *anydata, size_t size);
/* ----------------------------------------------------------------------
* String functions
* ---------------------------------------------------------------------- */
static int ply_find_string(const char *item, const char *const list[]);
static p_ply_element ply_find_element(p_ply ply, const char *name);
static p_ply_property ply_find_property(p_ply_element element,
const char *name);
/* ----------------------------------------------------------------------
* Header parsing
* ---------------------------------------------------------------------- */
static int ply_read_header_magic(p_ply ply);
static int ply_read_header_format(p_ply ply);
static int ply_read_header_comment(p_ply ply);
static int ply_read_header_obj_info(p_ply ply);
static int ply_read_header_property(p_ply ply);
static int ply_read_header_element(p_ply ply);
/* ----------------------------------------------------------------------
* Error handling
* ---------------------------------------------------------------------- */
static void ply_error_cb(p_ply ply, const char *message);
static void ply_ferror(p_ply ply, const char *fmt, ...);
/* ----------------------------------------------------------------------
* Memory allocation and initialization
* ---------------------------------------------------------------------- */
static void ply_init(p_ply ply);
static void ply_element_init(p_ply_element element);
static void ply_property_init(p_ply_property property);
static p_ply ply_alloc(void);
static p_ply_element ply_grow_element(p_ply ply);
static p_ply_property ply_grow_property(p_ply ply, p_ply_element element);
static void *ply_grow_array(p_ply ply, void **pointer, long *nmemb, long size);
/* ----------------------------------------------------------------------
* Special functions
* ---------------------------------------------------------------------- */
static e_ply_storage_mode ply_arch_endian(void);
static int ply_type_check(void);
/* ----------------------------------------------------------------------
* Auxiliary read functions
* ---------------------------------------------------------------------- */
static int ply_read_element(p_ply ply, p_ply_element element,
p_ply_argument argument);
static int ply_read_property(p_ply ply, p_ply_element element,
p_ply_property property, p_ply_argument argument);
static int ply_read_list_property(p_ply ply, p_ply_element element,
p_ply_property property,
p_ply_argument argument);
static int ply_read_scalar_property(p_ply ply, p_ply_element element,
p_ply_property property,
p_ply_argument argument);
/* ----------------------------------------------------------------------
* Buffer support functions
* ---------------------------------------------------------------------- */
/* pointers to tokenized word and line in buffer */
#define BWORD(p) (p->buffer + p->buffer_token)
#define BLINE(p) (p->buffer + p->buffer_token)
/* pointer to start of untouched bytes in buffer */
#define BFIRST(p) (p->buffer + p->buffer_first)
/* number of bytes untouched in buffer */
#define BSIZE(p) (p->buffer_last - p->buffer_first)
/* consumes data from buffer */
#define BSKIP(p, s) (p->buffer_first += s)
/* refills the buffer */
static int BREFILL(p_ply ply) {
/* move untouched data to beginning of buffer */
size_t size = BSIZE(ply);
memmove(ply->buffer, BFIRST(ply), size);
ply->buffer_last = size;
ply->buffer_first = ply->buffer_token = 0;
/* fill remaining with new data */
size = fread(ply->buffer + size, 1, BUFFERSIZE - size - 1, ply->fp);
/* place sentinel so we can use str* functions with buffer */
ply->buffer[BUFFERSIZE - 1] = '\0';
/* check if read failed */
if (size <= 0) return 0;
/* increase size to account for new data */
ply->buffer_last += size;
return 1;
}
/* We don't care about end-of-line, generally, because we
* separate words by any white-space character.
* Unfortunately, in binary mode, right after 'end_header',
* we have to know *exactly* how many characters to skip */
/* We use the end-of-line marker after the 'ply' magic
* number to figure out what to do */
static int ply_read_header_magic(p_ply ply) {
char *magic = ply->buffer;
if (!BREFILL(ply)) {
ply->error_cb(ply, "Unable to read magic number from file");
return 0;
}
/* check if it is ply */
if (magic[0] != 'p' || magic[1] != 'l' || magic[2] != 'y' ||
!isspace(magic[3])) {
ply->error_cb(ply, "Wrong magic number. Expected 'ply'");
return 0;
}
/* figure out if we have to skip the extra character
* after header when we reach the binary part of file */
ply->rn = magic[3] == '\r' && magic[4] == '\n';
BSKIP(ply, 3);
return 1;
}
/* ----------------------------------------------------------------------
* Exported functions
* ---------------------------------------------------------------------- */
/* ----------------------------------------------------------------------
* Read support functions
* ---------------------------------------------------------------------- */
p_ply ply_open(const char *name, p_ply_error_cb error_cb, long idata,
void *pdata) {
FILE *fp = NULL;
p_ply ply = ply_alloc();
if (error_cb == NULL) error_cb = ply_error_cb;
if (!ply) {
error_cb(NULL, "Out of memory");
return NULL;
}
ply->idata = idata;
ply->pdata = pdata;
ply->io_mode = PLY_READ;
ply->error_cb = error_cb;
if (!ply_type_check()) {
error_cb(ply, "Incompatible type system");
free(ply);
return NULL;
}
assert(name);
fp = fopen(name, "rb");
if (!fp) {
error_cb(ply, "Unable to open file");
free(ply);
return NULL;
}
ply->fp = fp;
return ply;
}
int ply_read_header(p_ply ply) {
assert(ply && ply->fp && ply->io_mode == PLY_READ);
if (!ply_read_header_magic(ply)) return 0;
if (!ply_read_word(ply)) return 0;
/* parse file format */
if (!ply_read_header_format(ply)) {
ply_ferror(ply, "Invalid file format");
return 0;
}
/* parse elements, comments or obj_infos until the end of header */
while (strcmp(BWORD(ply), "end_header")) {
if (!ply_read_header_comment(ply) && !ply_read_header_element(ply) &&
!ply_read_header_obj_info(ply)) {
ply_ferror(ply, "Unexpected token '%s'", BWORD(ply));
return 0;
}
}
/* skip extra character? */
if (ply->rn) {
if (BSIZE(ply) < 1 && !BREFILL(ply)) {
ply_ferror(ply, "Unexpected end of file");
return 0;
}
BSKIP(ply, 1);
}
return 1;
}
long ply_set_read_cb(p_ply ply, const char *element_name,
const char *property_name, p_ply_read_cb read_cb,
void *pdata, long idata) {
p_ply_element element = NULL;
p_ply_property property = NULL;
assert(ply && element_name && property_name);
element = ply_find_element(ply, element_name);
if (!element) return 0;
property = ply_find_property(element, property_name);
if (!property) return 0;
property->read_cb = read_cb;
property->pdata = pdata;
property->idata = idata;
return (int)element->ninstances;
}
int ply_read(p_ply ply) {
long i;
p_ply_argument argument;
assert(ply && ply->fp && ply->io_mode == PLY_READ);
argument = &ply->argument;
/* for each element type */
for (i = 0; i < ply->nelements; i++) {
p_ply_element element = &ply->element[i];
argument->element = element;
if (!ply_read_element(ply, element, argument)) return 0;
}
return 1;
}
/* ----------------------------------------------------------------------
* Write support functions
* ---------------------------------------------------------------------- */
p_ply ply_create(const char *name, e_ply_storage_mode storage_mode,
p_ply_error_cb error_cb, long idata, void *pdata) {
FILE *fp = NULL;
p_ply ply = ply_alloc();
if (error_cb == NULL) error_cb = ply_error_cb;
if (!ply) {
error_cb(NULL, "Out of memory");
return NULL;
}
if (!ply_type_check()) {
error_cb(ply, "Incompatible type system");
free(ply);
return NULL;
}
assert(name && storage_mode <= PLY_DEFAULT);
fp = fopen(name, "wb");
if (!fp) {
error_cb(ply, "Unable to create file");
free(ply);
return NULL;
}
ply->idata = idata;
ply->pdata = pdata;
ply->io_mode = PLY_WRITE;
if (storage_mode == PLY_DEFAULT) storage_mode = ply_arch_endian();
if (storage_mode == PLY_ASCII)
ply->odriver = &ply_odriver_ascii;
else if (storage_mode == ply_arch_endian())
ply->odriver = &ply_odriver_binary;
else
ply->odriver = &ply_odriver_binary_reverse;
ply->storage_mode = storage_mode;
ply->fp = fp;
ply->error_cb = error_cb;
return ply;
}
int ply_add_element(p_ply ply, const char *name, long ninstances) {
p_ply_element element = NULL;
assert(ply && ply->fp && ply->io_mode == PLY_WRITE);
assert(name && strlen(name) < WORDSIZE && ninstances >= 0);
if (strlen(name) >= WORDSIZE || ninstances < 0) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
element = ply_grow_element(ply);
if (!element) return 0;
strcpy(element->name, name);
element->ninstances = ninstances;
return 1;
}
int ply_add_scalar_property(p_ply ply, const char *name, e_ply_type type) {
p_ply_element element = NULL;
p_ply_property property = NULL;
assert(ply && ply->fp && ply->io_mode == PLY_WRITE);
assert(name && strlen(name) < WORDSIZE);
assert(type < PLY_LIST);
if (strlen(name) >= WORDSIZE || type >= PLY_LIST) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
element = &ply->element[ply->nelements - 1];
property = ply_grow_property(ply, element);
if (!property) return 0;
strcpy(property->name, name);
property->type = type;
return 1;
}
int ply_add_list_property(p_ply ply, const char *name, e_ply_type length_type,
e_ply_type value_type) {
p_ply_element element = NULL;
p_ply_property property = NULL;
assert(ply && ply->fp && ply->io_mode == PLY_WRITE);
assert(name && strlen(name) < WORDSIZE);
if (strlen(name) >= WORDSIZE) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
assert(length_type < PLY_LIST);
assert(value_type < PLY_LIST);
if (length_type >= PLY_LIST || value_type >= PLY_LIST) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
element = &ply->element[ply->nelements - 1];
property = ply_grow_property(ply, element);
if (!property) return 0;
strcpy(property->name, name);
property->type = PLY_LIST;
property->length_type = length_type;
property->value_type = value_type;
return 1;
}
int ply_add_property(p_ply ply, const char *name, e_ply_type type,
e_ply_type length_type, e_ply_type value_type) {
if (type == PLY_LIST)
return ply_add_list_property(ply, name, length_type, value_type);
else
return ply_add_scalar_property(ply, name, type);
}
int ply_add_comment(p_ply ply, const char *comment) {
char *new_comment = NULL;
assert(ply && comment && strlen(comment) < LINESIZE);
if (!comment || strlen(comment) >= LINESIZE) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
new_comment = (char *)ply_grow_array(ply, (void **)&ply->comment,
&ply->ncomments, LINESIZE);
if (!new_comment) return 0;
strcpy(new_comment, comment);
return 1;
}
int ply_add_obj_info(p_ply ply, const char *obj_info) {
char *new_obj_info = NULL;
assert(ply && obj_info && strlen(obj_info) < LINESIZE);
if (!obj_info || strlen(obj_info) >= LINESIZE) {
ply_ferror(ply, "Invalid arguments");
return 0;
}
new_obj_info = (char *)ply_grow_array(ply, (void **)&ply->obj_info,
&ply->nobj_infos, LINESIZE);
if (!new_obj_info) return 0;
strcpy(new_obj_info, obj_info);
return 1;
}
int ply_write_header(p_ply ply) {
long i, j;
assert(ply && ply->fp && ply->io_mode == PLY_WRITE);
assert(ply->element || ply->nelements == 0);
assert(!ply->element || ply->nelements > 0);
if (fprintf(ply->fp, "ply\nformat %s 1.0\n",
ply_storage_mode_list[ply->storage_mode]) <= 0)
goto error;
for (i = 0; i < ply->ncomments; i++)
if (fprintf(ply->fp, "comment %s\n", ply->comment + LINESIZE * i) <= 0)
goto error;
for (i = 0; i < ply->nobj_infos; i++)
if (fprintf(ply->fp, "obj_info %s\n", ply->obj_info + LINESIZE * i) <=
0)
goto error;
for (i = 0; i < ply->nelements; i++) {
p_ply_element element = &ply->element[i];
assert(element->property || element->nproperties == 0);
assert(!element->property || element->nproperties > 0);
if (fprintf(ply->fp, "element %s %ld\n", element->name,
element->ninstances) <= 0)
goto error;
for (j = 0; j < element->nproperties; j++) {
p_ply_property property = &element->property[j];
if (property->type == PLY_LIST) {
if (fprintf(ply->fp, "property list %s %s %s\n",
ply_type_list[property->length_type],
ply_type_list[property->value_type],
property->name) <= 0)
goto error;
} else {
if (fprintf(ply->fp, "property %s %s\n",
ply_type_list[property->type], property->name) <= 0)
goto error;
}
}
}
return fprintf(ply->fp, "end_header\n") > 0;
error:
ply_ferror(ply, "Error writing to file");
return 0;
}
int ply_write(p_ply ply, double value) {
p_ply_element element = NULL;
p_ply_property property = NULL;
int type = -1;
int breakafter = 0;
int spaceafter = 1;
if (ply->welement > ply->nelements) return 0;
element = &ply->element[ply->welement];
if (ply->wproperty > element->nproperties) return 0;
property = &element->property[ply->wproperty];
if (property->type == PLY_LIST) {
if (ply->wvalue_index == 0) {
type = property->length_type;
ply->wlength = (long)value;
} else
type = property->value_type;
} else {
type = property->type;
ply->wlength = 0;
}
if (!ply->odriver->ohandler[type](ply, value)) {
ply_ferror(ply, "Failed writing %s of %s %d (%s: %s)", property->name,
element->name, ply->winstance_index, ply->odriver->name,
ply_type_list[type]);
return 0;
}
ply->wvalue_index++;
if (ply->wvalue_index > ply->wlength) {
ply->wvalue_index = 0;
ply->wproperty++;
}
if (ply->wproperty >= element->nproperties) {
ply->wproperty = 0;
ply->winstance_index++;
breakafter = 1;
spaceafter = 0;
}
if (ply->winstance_index >= element->ninstances) {
ply->winstance_index = 0;
do {
ply->welement++;
element = &ply->element[ply->welement];
} while (ply->welement < ply->nelements && !element->ninstances);
}
if (ply->storage_mode == PLY_ASCII) {
return (!spaceafter || putc(' ', ply->fp) > 0) &&
(!breakafter || putc('\n', ply->fp) > 0);
} else {
return 1;
}
}
int ply_close(p_ply ply) {
long i;
assert(ply && ply->fp);
assert(ply->element || ply->nelements == 0);
assert(!ply->element || ply->nelements > 0);
/* write last chunk to file */
if (ply->io_mode == PLY_WRITE &&
fwrite(ply->buffer, 1, ply->buffer_last, ply->fp) < ply->buffer_last) {
ply_ferror(ply, "Error closing up");
return 0;
}
fclose(ply->fp);
/* free all memory used by handle */
if (ply->element) {
for (i = 0; i < ply->nelements; i++) {
p_ply_element element = &ply->element[i];
if (element->property) free(element->property);
}
free(ply->element);
}
if (ply->obj_info) free(ply->obj_info);
if (ply->comment) free(ply->comment);
free(ply);
return 1;
}
/* ----------------------------------------------------------------------
* Query support functions
* ---------------------------------------------------------------------- */
p_ply_element ply_get_next_element(p_ply ply, p_ply_element last) {
assert(ply);
if (!last) return ply->element;
last++;
if (last < ply->element + ply->nelements)
return last;
else
return NULL;
}
int ply_get_element_info(p_ply_element element, const char **name,
long *ninstances) {
assert(element);
if (name) *name = element->name;
if (ninstances) *ninstances = (long)element->ninstances;
return 1;
}
p_ply_property ply_get_next_property(p_ply_element element,
p_ply_property last) {
assert(element);
if (!last) return element->property;
last++;
if (last < element->property + element->nproperties)
return last;
else
return NULL;
}
int ply_get_property_info(p_ply_property property, const char **name,
e_ply_type *type, e_ply_type *length_type,
e_ply_type *value_type) {
assert(property);
if (name) *name = property->name;
if (type) *type = property->type;
if (length_type) *length_type = property->length_type;
if (value_type) *value_type = property->value_type;
return 1;
}
const char *ply_get_next_comment(p_ply ply, const char *last) {
assert(ply);
if (!last) return ply->comment;
last += LINESIZE;
if (last < ply->comment + LINESIZE * ply->ncomments)
return last;
else
return NULL;
}
const char *ply_get_next_obj_info(p_ply ply, const char *last) {
assert(ply);
if (!last) return ply->obj_info;
last += LINESIZE;
if (last < ply->obj_info + LINESIZE * ply->nobj_infos)
return last;
else
return NULL;
}
/* ----------------------------------------------------------------------
* Callback argument support functions
* ---------------------------------------------------------------------- */
int ply_get_argument_element(p_ply_argument argument, p_ply_element *element,
long *instance_index) {
assert(argument);
if (!argument) return 0;
if (element) *element = argument->element;
if (instance_index) *instance_index = argument->instance_index;
return 1;
}
int ply_get_argument_property(p_ply_argument argument, p_ply_property *property,
long *length, long *value_index) {
assert(argument);
if (!argument) return 0;
if (property) *property = argument->property;
if (length) *length = argument->length;
if (value_index) *value_index = argument->value_index;
return 1;
}
int ply_get_argument_user_data(p_ply_argument argument, void **pdata,
long *idata) {
assert(argument);
if (!argument) return 0;
if (pdata) *pdata = argument->pdata;
if (idata) *idata = argument->idata;
return 1;
}
double ply_get_argument_value(p_ply_argument argument) {
assert(argument);
if (!argument) return 0.0;
return argument->value;
}
int ply_get_ply_user_data(p_ply ply, void **pdata, long *idata) {
assert(ply);
if (!ply) return 0;
if (pdata) *pdata = ply->pdata;
if (idata) *idata = ply->idata;
return 1;
}
/* ----------------------------------------------------------------------
* Internal functions
* ---------------------------------------------------------------------- */
static int ply_read_list_property(p_ply ply, p_ply_element element,
p_ply_property property,
p_ply_argument argument) {
int l;
p_ply_read_cb read_cb = property->read_cb;
p_ply_ihandler *driver = ply->idriver->ihandler;
/* get list length */
p_ply_ihandler handler = driver[property->length_type];
double length;
if (!handler(ply, &length)) {
ply_ferror(ply, "Error reading '%s' of '%s' number %d", property->name,
element->name, argument->instance_index);
return 0;
}
/* invoke callback to pass length in value field */
argument->length = (long)length;
argument->value_index = -1;
argument->value = length;
if (read_cb && !read_cb(argument)) {
ply_ferror(ply, "Aborted by user");
return 0;
}
/* read list values */
handler = driver[property->value_type];
/* for each value in list */
for (l = 0; l < (long)length; l++) {
/* read value from file */
argument->value_index = l;
if (!handler(ply, &argument->value)) {
ply_ferror(ply,
"Error reading value number %d of '%s' of "
"'%s' number %d",
l + 1, property->name, element->name,
argument->instance_index);
return 0;
}
/* invoke callback to pass value */
if (read_cb && !read_cb(argument)) {
ply_ferror(ply, "Aborted by user");
return 0;
}
}
return 1;
}
static int ply_read_scalar_property(p_ply ply, p_ply_element element,
p_ply_property property,
p_ply_argument argument) {
p_ply_read_cb read_cb = property->read_cb;
p_ply_ihandler *driver = ply->idriver->ihandler;
p_ply_ihandler handler = driver[property->type];
argument->length = 1;
argument->value_index = 0;
if (!handler(ply, &argument->value)) {
ply_ferror(ply, "Error reading '%s' of '%s' number %d", property->name,
element->name, argument->instance_index);
return 0;
}
if (read_cb && !read_cb(argument)) {
ply_ferror(ply, "Aborted by user");
return 0;
}
return 1;
}
static int ply_read_property(p_ply ply, p_ply_element element,
p_ply_property property, p_ply_argument argument) {
if (property->type == PLY_LIST)
return ply_read_list_property(ply, element, property, argument);
else
return ply_read_scalar_property(ply, element, property, argument);
}
static int ply_read_element(p_ply ply, p_ply_element element,
p_ply_argument argument) {
long j, k;
/* for each element of this type */
for (j = 0; j < element->ninstances; j++) {
argument->instance_index = j;
/* for each property */
for (k = 0; k < element->nproperties; k++) {
p_ply_property property = &element->property[k];
argument->property = property;
argument->pdata = property->pdata;
argument->idata = property->idata;
if (!ply_read_property(ply, element, property, argument)) return 0;
}
}
return 1;
}
static int ply_find_string(const char *item, const char *const list[]) {
int i;
assert(item && list);
for (i = 0; list[i]; i++)
if (!strcmp(list[i], item)) return i;
return -1;
}
static p_ply_element ply_find_element(p_ply ply, const char *name) {
p_ply_element element;
int i, nelements;
assert(ply && name);
element = ply->element;
nelements = ply->nelements;
assert(element || nelements == 0);
assert(!element || nelements > 0);
for (i = 0; i < nelements; i++)
if (!strcmp(element[i].name, name)) return &element[i];
return NULL;
}
static p_ply_property ply_find_property(p_ply_element element,
const char *name) {
p_ply_property property;
int i, nproperties;
assert(element && name);
property = element->property;
nproperties = element->nproperties;
assert(property || nproperties == 0);
assert(!property || nproperties > 0);
for (i = 0; i < nproperties; i++)
if (!strcmp(property[i].name, name)) return &property[i];
return NULL;
}
static int ply_check_word(p_ply ply) {
size_t size = strlen(BWORD(ply));
if (size >= WORDSIZE) {
ply_ferror(ply, "Word too long");
return 0;
} else if (size == 0) {
ply_ferror(ply, "Unexpected end of file");
return 0;
}
return 1;
}
static int ply_read_word(p_ply ply) {
size_t t = 0;
assert(ply && ply->fp && ply->io_mode == PLY_READ);
/* skip leading blanks */
while (1) {
t = strspn(BFIRST(ply), " \n\r\t");
/* check if all buffer was made of blanks */
if (t >= BSIZE(ply)) {
if (!BREFILL(ply)) {
ply_ferror(ply, "Unexpected end of file");
return 0;
}
} else
break;
}
BSKIP(ply, t);
/* look for a space after the current word */
t = strcspn(BFIRST(ply), " \n\r\t");
/* if we didn't reach the end of the buffer, we are done */
if (t < BSIZE(ply)) {
ply_finish_word(ply, t);
return ply_check_word(ply);
}
/* otherwise, try to refill buffer */
if (!BREFILL(ply)) {
/* if we reached the end of file, try to do with what we have */
ply_finish_word(ply, t);
return ply_check_word(ply);
/* ply_ferror(ply, "Unexpected end of file"); */
/* return 0; */
}
/* keep looking from where we left */
t += strcspn(BFIRST(ply) + t, " \n\r\t");
/* check if the token is too large for our buffer */
if (t >= BSIZE(ply)) {
ply_ferror(ply, "Token too large");
return 0;
}
/* we are done */
ply_finish_word(ply, t);
return ply_check_word(ply);
}
static void ply_finish_word(p_ply ply, size_t size) {
ply->buffer_token = ply->buffer_first;
BSKIP(ply, size);
*BFIRST(ply) = '\0';
BSKIP(ply, 1);
}
static int ply_check_line(p_ply ply) {
if (strlen(BLINE(ply)) >= LINESIZE) {
ply_ferror(ply, "Line too long");