/
isn.c
1135 lines (1016 loc) · 24.5 KB
/
isn.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
/*-------------------------------------------------------------------------
*
* isn.c
* PostgreSQL type definitions for ISNs (ISBN, ISMN, ISSN, EAN13, UPC)
*
* Author: German Mendez Bravo (Kronuz)
* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
*
* IDENTIFICATION
* contrib/isn/isn.c
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "fmgr.h"
#include "utils/builtins.h"
#include "isn.h"
#include "EAN13.h"
#include "ISBN.h"
#include "ISMN.h"
#include "ISSN.h"
#include "UPC.h"
PG_MODULE_MAGIC;
#define MAXEAN13LEN 18
enum isn_type
{
INVALID, ANY, EAN13, ISBN, ISMN, ISSN, UPC
};
static const char *const isn_names[] = {"EAN13/UPC/ISxN", "EAN13/UPC/ISxN", "EAN13", "ISBN", "ISMN", "ISSN", "UPC"};
static bool g_weak = false;
static bool g_initialized = false;
/***********************************************************************
**
** Routines for EAN13/UPC/ISxNs.
**
** Note:
** In this code, a normalized string is one that is known to be a valid
** ISxN number containing only digits and hyphens and with enough space
** to hold the full 13 digits plus the maximum of four hyphens.
***********************************************************************/
/*----------------------------------------------------------
* Debugging routines.
*---------------------------------------------------------*/
/*
* Check if the table and its index is correct (just for debugging)
*/
#ifdef ISN_DEBUG
static bool
check_table(const char *(*TABLE)[2], const unsigned TABLE_index[10][2])
{
const char *aux1,
*aux2;
int a,
b,
x = 0,
y = -1,
i = 0,
j,
cnt = 0,
init = 0;
if (TABLE == NULL || TABLE_index == NULL)
return true;
while (TABLE[i][0] && TABLE[i][1])
{
aux1 = TABLE[i][0];
aux2 = TABLE[i][1];
/* must always start with a digit: */
if (!isdigit((unsigned char) *aux1) || !isdigit((unsigned char) *aux2))
goto invalidtable;
a = *aux1 - '0';
b = *aux2 - '0';
/* must always have the same format and length: */
while (*aux1 && *aux2)
{
if (!(isdigit((unsigned char) *aux1) &&
isdigit((unsigned char) *aux2)) &&
(*aux1 != *aux2 || *aux1 != '-'))
goto invalidtable;
aux1++;
aux2++;
}
if (*aux1 != *aux2)
goto invalidtable;
/* found a new range */
if (a > y)
{
/* check current range in the index: */
for (j = x; j <= y; j++)
{
if (TABLE_index[j][0] != init)
goto invalidindex;
if (TABLE_index[j][1] != i - init)
goto invalidindex;
}
init = i;
x = a;
}
/* Always get the new limit */
y = b;
if (y < x)
goto invalidtable;
i++;
}
return true;
invalidtable:
elog(DEBUG1, "invalid table near {\"%s\", \"%s\"} (pos: %d)",
TABLE[i][0], TABLE[i][1], i);
return false;
invalidindex:
elog(DEBUG1, "index %d is invalid", j);
return false;
}
#endif /* ISN_DEBUG */
/*----------------------------------------------------------
* Formatting and conversion routines.
*---------------------------------------------------------*/
static unsigned
dehyphenate(char *bufO, char *bufI)
{
unsigned ret = 0;
while (*bufI)
{
if (isdigit((unsigned char) *bufI))
{
*bufO++ = *bufI;
ret++;
}
bufI++;
}
*bufO = '\0';
return ret;
}
/*
* hyphenate --- Try to hyphenate, in-place, the string starting at bufI
* into bufO using the given hyphenation range TABLE.
* Assumes the input string to be used is of only digits.
*
* Returns the number of characters actually hyphenated.
*/
static unsigned
hyphenate(char *bufO, char *bufI, const char *(*TABLE)[2], const unsigned TABLE_index[10][2])
{
unsigned ret = 0;
const char *ean_aux1,
*ean_aux2,
*ean_p;
char *firstdig,
*aux1,
*aux2;
unsigned search,
upper,
lower,
step;
bool ean_in1,
ean_in2;
/* just compress the string if no further hyphenation is required */
if (TABLE == NULL || TABLE_index == NULL)
{
while (*bufI)
{
*bufO++ = *bufI++;
ret++;
}
*bufO = '\0';
return (ret + 1);
}
/* add remaining hyphenations */
search = *bufI - '0';
upper = lower = TABLE_index[search][0];
upper += TABLE_index[search][1];
lower--;
step = (upper - lower) / 2;
if (step == 0)
return 0;
search = lower + step;
firstdig = bufI;
ean_in1 = ean_in2 = false;
ean_aux1 = TABLE[search][0];
ean_aux2 = TABLE[search][1];
do
{
if ((ean_in1 || *firstdig >= *ean_aux1) && (ean_in2 || *firstdig <= *ean_aux2))
{
if (*firstdig > *ean_aux1)
ean_in1 = true;
if (*firstdig < *ean_aux2)
ean_in2 = true;
if (ean_in1 && ean_in2)
break;
firstdig++, ean_aux1++, ean_aux2++;
if (!(*ean_aux1 && *ean_aux2 && *firstdig))
break;
if (!isdigit((unsigned char) *ean_aux1))
ean_aux1++, ean_aux2++;
}
else
{
/*
* check in what direction we should go and move the pointer
* accordingly
*/
if (*firstdig < *ean_aux1 && !ean_in1)
upper = search;
else
lower = search;
step = (upper - lower) / 2;
search = lower + step;
/* Initialize stuff again: */
firstdig = bufI;
ean_in1 = ean_in2 = false;
ean_aux1 = TABLE[search][0];
ean_aux2 = TABLE[search][1];
}
} while (step);
if (step)
{
aux1 = bufO;
aux2 = bufI;
ean_p = TABLE[search][0];
while (*ean_p && *aux2)
{
if (*ean_p++ != '-')
*aux1++ = *aux2++;
else
*aux1++ = '-';
ret++;
}
*aux1++ = '-';
*aux1 = *aux2; /* add a lookahead char */
return (ret + 1);
}
return ret;
}
/*
* weight_checkdig -- Receives a buffer with a normalized ISxN string number,
* and the length to weight.
*
* Returns the weight of the number (the check digit value, 0-10)
*/
static unsigned
weight_checkdig(char *isn, unsigned size)
{
unsigned weight = 0;
while (*isn && size > 1)
{
if (isdigit((unsigned char) *isn))
{
weight += size-- * (*isn - '0');
}
isn++;
}
weight = weight % 11;
if (weight != 0)
weight = 11 - weight;
return weight;
}
/*
* checkdig --- Receives a buffer with a normalized ISxN string number,
* and the length to check.
*
* Returns the check digit value (0-9)
*/
static unsigned
checkdig(char *num, unsigned size)
{
unsigned check = 0,
check3 = 0;
unsigned pos = 0;
if (*num == 'M')
{ /* ISMN start with 'M' */
check3 = 3;
pos = 1;
}
while (*num && size > 1)
{
if (isdigit((unsigned char) *num))
{
if (pos++ % 2)
check3 += *num - '0';
else
check += *num - '0';
size--;
}
num++;
}
check = (check + 3 * check3) % 10;
if (check != 0)
check = 10 - check;
return check;
}
/*
* ean2isn --- Try to convert an ean13 number to a UPC/ISxN number.
* This doesn't verify for a valid check digit.
*
* If errorOK is false, ereport a useful error message if the ean13 is bad.
* If errorOK is true, just return "false" for bad input.
*/
static bool
ean2isn(ean13 ean, bool errorOK, ean13 *result, enum isn_type accept)
{
enum isn_type type = INVALID;
char buf[MAXEAN13LEN + 1];
char *aux;
unsigned digval;
unsigned search;
ean13 ret = ean;
ean >>= 1;
/* verify it's in the EAN13 range */
if (ean > UINT64CONST(9999999999999))
goto eantoobig;
/* convert the number */
search = 0;
aux = buf + 13;
*aux = '\0'; /* terminate string; aux points to last digit */
do
{
digval = (unsigned) (ean % 10); /* get the decimal value */
ean /= 10; /* get next digit */
*--aux = (char) (digval + '0'); /* convert to ascii and store */
} while (ean && search++ < 12);
while (search++ < 12)
*--aux = '0'; /* fill the remaining EAN13 with '0' */
/* find out the data type: */
if (strncmp("978", buf, 3) == 0)
{ /* ISBN */
type = ISBN;
}
else if (strncmp("977", buf, 3) == 0)
{ /* ISSN */
type = ISSN;
}
else if (strncmp("9790", buf, 4) == 0)
{ /* ISMN */
type = ISMN;
}
else if (strncmp("979", buf, 3) == 0)
{ /* ISBN-13 */
type = ISBN;
}
else if (*buf == '0')
{ /* UPC */
type = UPC;
}
else
{
type = EAN13;
}
if (accept != ANY && accept != EAN13 && accept != type)
goto eanwrongtype;
*result = ret;
return true;
eanwrongtype:
if (!errorOK)
{
if (type != EAN13)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("cannot cast EAN13(%s) to %s for number: \"%s\"",
isn_names[type], isn_names[accept], buf)));
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("cannot cast %s to %s for number: \"%s\"",
isn_names[type], isn_names[accept], buf)));
}
}
return false;
eantoobig:
if (!errorOK)
{
char eanbuf[64];
/*
* Format the number separately to keep the machine-dependent format
* code out of the translatable message text
*/
snprintf(eanbuf, sizeof(eanbuf), EAN13_FORMAT, ean);
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("value \"%s\" is out of range for %s type",
eanbuf, isn_names[type])));
}
return false;
}
/*
* ean2UPC/ISxN --- Convert in-place a normalized EAN13 string to the corresponding
* UPC/ISxN string number. Assumes the input string is normalized.
*/
static inline void
ean2ISBN(char *isn)
{
char *aux;
unsigned check;
/*
* The number should come in this format: 978-0-000-00000-0
* or may be an ISBN-13 number, 979-..., which does not have a short
* representation. Do the short output version if possible.
*/
if (strncmp("978-", isn, 4) == 0)
{
/* Strip the first part and calculate the new check digit */
hyphenate(isn, isn + 4, NULL, NULL);
check = weight_checkdig(isn, 10);
aux = strchr(isn, '\0');
while (!isdigit((unsigned char) *--aux));
if (check == 10)
*aux = 'X';
else
*aux = check + '0';
}
}
static inline void
ean2ISMN(char *isn)
{
/* the number should come in this format: 979-0-000-00000-0 */
/* Just strip the first part and change the first digit ('0') to 'M' */
hyphenate(isn, isn + 4, NULL, NULL);
isn[0] = 'M';
}
static inline void
ean2ISSN(char *isn)
{
unsigned check;
/* the number should come in this format: 977-0000-000-00-0 */
/* Strip the first part, crop, and calculate the new check digit */
hyphenate(isn, isn + 4, NULL, NULL);
check = weight_checkdig(isn, 8);
if (check == 10)
isn[8] = 'X';
else
isn[8] = check + '0';
isn[9] = '\0';
}
static inline void
ean2UPC(char *isn)
{
/* the number should come in this format: 000-000000000-0 */
/* Strip the first part, crop, and dehyphenate */
dehyphenate(isn, isn + 1);
isn[12] = '\0';
}
/*
* ean2* --- Converts a string of digits into an ean13 number.
* Assumes the input string is a string with only digits
* on it, and that it's within the range of ean13.
*
* Returns the ean13 value of the string.
*/
static ean13
str2ean(const char *num)
{
ean13 ean = 0; /* current ean */
while (*num)
{
if (isdigit((unsigned char) *num))
ean = 10 * ean + (*num - '0');
num++;
}
return (ean << 1); /* also give room to a flag */
}
/*
* ean2string --- Try to convert an ean13 number to an hyphenated string.
* Assumes there's enough space in result to hold
* the string (maximum MAXEAN13LEN+1 bytes)
* This doesn't verify for a valid check digit.
*
* If shortType is true, the returned string is in the old ISxN short format.
* If errorOK is false, ereport a useful error message if the string is bad.
* If errorOK is true, just return "false" for bad input.
*/
static bool
ean2string(ean13 ean, bool errorOK, char *result, bool shortType)
{
const char *(*TABLE)[2];
const unsigned (*TABLE_index)[2];
enum isn_type type = INVALID;
char *aux;
unsigned digval;
unsigned search;
char valid = '\0'; /* was the number initially written with a
* valid check digit? */
TABLE_index = ISBN_index;
if ((ean & 1) != 0)
valid = '!';
ean >>= 1;
/* verify it's in the EAN13 range */
if (ean > UINT64CONST(9999999999999))
goto eantoobig;
/* convert the number */
search = 0;
aux = result + MAXEAN13LEN;
*aux = '\0'; /* terminate string; aux points to last digit */
*--aux = valid; /* append '!' for numbers with invalid but
* corrected check digit */
do
{
digval = (unsigned) (ean % 10); /* get the decimal value */
ean /= 10; /* get next digit */
*--aux = (char) (digval + '0'); /* convert to ascii and store */
if (search == 0)
*--aux = '-'; /* the check digit is always there */
} while (ean && search++ < 13);
while (search++ < 13)
*--aux = '0'; /* fill the remaining EAN13 with '0' */
/* The string should be in this form: ???DDDDDDDDDDDD-D" */
search = hyphenate(result, result + 3, EAN13_range, EAN13_index);
/* verify it's a logically valid EAN13 */
if (search == 0)
{
search = hyphenate(result, result + 3, NULL, NULL);
goto okay;
}
/* find out what type of hyphenation is needed: */
if (strncmp("978-", result, search) == 0)
{ /* ISBN -13 978-range */
/* The string should be in this form: 978-??000000000-0" */
type = ISBN;
TABLE = ISBN_range;
TABLE_index = ISBN_index;
}
else if (strncmp("977-", result, search) == 0)
{ /* ISSN */
/* The string should be in this form: 977-??000000000-0" */
type = ISSN;
TABLE = ISSN_range;
TABLE_index = ISSN_index;
}
else if (strncmp("979-0", result, search + 1) == 0)
{ /* ISMN */
/* The string should be in this form: 979-0?000000000-0" */
type = ISMN;
TABLE = ISMN_range;
TABLE_index = ISMN_index;
}
else if (strncmp("979-", result, search) == 0)
{ /* ISBN-13 979-range */
/* The string should be in this form: 979-??000000000-0" */
type = ISBN;
TABLE = ISBN_range_new;
TABLE_index = ISBN_index_new;
}
else if (*result == '0')
{ /* UPC */
/* The string should be in this form: 000-00000000000-0" */
type = UPC;
TABLE = UPC_range;
TABLE_index = UPC_index;
}
else
{
type = EAN13;
TABLE = NULL;
TABLE_index = NULL;
}
/* verify it's a logically valid EAN13/UPC/ISxN */
digval = search;
search = hyphenate(result + digval, result + digval + 2, TABLE, TABLE_index);
/* verify it's a valid EAN13 */
if (search == 0)
{
search = hyphenate(result + digval, result + digval + 2, NULL, NULL);
goto okay;
}
okay:
/* convert to the old short type: */
if (shortType)
switch (type)
{
case ISBN:
ean2ISBN(result);
break;
case ISMN:
ean2ISMN(result);
break;
case ISSN:
ean2ISSN(result);
break;
case UPC:
ean2UPC(result);
break;
default:
break;
}
return true;
eantoobig:
if (!errorOK)
{
char eanbuf[64];
/*
* Format the number separately to keep the machine-dependent format
* code out of the translatable message text
*/
snprintf(eanbuf, sizeof(eanbuf), EAN13_FORMAT, ean);
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("value \"%s\" is out of range for %s type",
eanbuf, isn_names[type])));
}
return false;
}
/*
* string2ean --- try to parse a string into an ean13.
*
* If errorOK is false, ereport a useful error message if the string is bad.
* If errorOK is true, just return "false" for bad input.
*
* if the input string ends with '!' it will always be treated as invalid
* (even if the check digit is valid)
*/
static bool
string2ean(const char *str, bool errorOK, ean13 *result,
enum isn_type accept)
{
bool digit,
last;
char buf[17] = " ";
char *aux1 = buf + 3; /* leave space for the first part, in case
* it's needed */
const char *aux2 = str;
enum isn_type type = INVALID;
unsigned check = 0,
rcheck = (unsigned) -1;
unsigned length = 0;
bool magic = false,
valid = true;
/* recognize and validate the number: */
while (*aux2 && length <= 13)
{
last = (*(aux2 + 1) == '!' || *(aux2 + 1) == '\0'); /* is the last character */
digit = (isdigit((unsigned char) *aux2) != 0); /* is current character
* a digit? */
if (*aux2 == '?' && last) /* automagically calculate check digit
* if it's '?' */
magic = digit = true;
if (length == 0 && (*aux2 == 'M' || *aux2 == 'm'))
{
/* only ISMN can be here */
if (type != INVALID)
goto eaninvalid;
type = ISMN;
*aux1++ = 'M';
length++;
}
else if (length == 7 && (digit || *aux2 == 'X' || *aux2 == 'x') && last)
{
/* only ISSN can be here */
if (type != INVALID)
goto eaninvalid;
type = ISSN;
*aux1++ = toupper((unsigned char) *aux2);
length++;
}
else if (length == 9 && (digit || *aux2 == 'X' || *aux2 == 'x') && last)
{
/* only ISBN and ISMN can be here */
if (type != INVALID && type != ISMN)
goto eaninvalid;
if (type == INVALID)
type = ISBN; /* ISMN must start with 'M' */
*aux1++ = toupper((unsigned char) *aux2);
length++;
}
else if (length == 11 && digit && last)
{
/* only UPC can be here */
if (type != INVALID)
goto eaninvalid;
type = UPC;
*aux1++ = *aux2;
length++;
}
else if (*aux2 == '-' || *aux2 == ' ')
{
/* skip, we could validate but I think it's worthless */
}
else if (*aux2 == '!' && *(aux2 + 1) == '\0')
{
/* the invalid check digit suffix was found, set it */
if (!magic)
valid = false;
magic = true;
}
else if (!digit)
{
goto eaninvalid;
}
else
{
*aux1++ = *aux2;
if (++length > 13)
goto eantoobig;
}
aux2++;
}
*aux1 = '\0'; /* terminate the string */
/* find the current check digit value */
if (length == 13)
{
/* only EAN13 can be here */
if (type != INVALID)
goto eaninvalid;
type = EAN13;
check = buf[15] - '0';
}
else if (length == 12)
{
/* only UPC can be here */
if (type != UPC)
goto eaninvalid;
check = buf[14] - '0';
}
else if (length == 10)
{
if (type != ISBN && type != ISMN)
goto eaninvalid;
if (buf[12] == 'X')
check = 10;
else
check = buf[12] - '0';
}
else if (length == 8)
{
if (type != INVALID && type != ISSN)
goto eaninvalid;
type = ISSN;
if (buf[10] == 'X')
check = 10;
else
check = buf[10] - '0';
}
else
goto eaninvalid;
if (type == INVALID)
goto eaninvalid;
/* obtain the real check digit value, validate, and convert to ean13: */
if (accept == EAN13 && type != accept)
goto eanwrongtype;
if (accept != ANY && type != EAN13 && type != accept)
goto eanwrongtype;
switch (type)
{
case EAN13:
valid = (valid && ((rcheck = checkdig(buf + 3, 13)) == check || magic));
/* now get the subtype of EAN13: */
if (buf[3] == '0')
type = UPC;
else if (strncmp("977", buf + 3, 3) == 0)
type = ISSN;
else if (strncmp("978", buf + 3, 3) == 0)
type = ISBN;
else if (strncmp("9790", buf + 3, 4) == 0)
type = ISMN;
else if (strncmp("979", buf + 3, 3) == 0)
type = ISBN;
if (accept != EAN13 && accept != ANY && type != accept)
goto eanwrongtype;
break;
case ISMN:
strncpy(buf, "9790", 4); /* this isn't for sure yet, for now
* ISMN it's only 9790 */
valid = (valid && ((rcheck = checkdig(buf, 13)) == check || magic));
break;
case ISBN:
strncpy(buf, "978", 3);
valid = (valid && ((rcheck = weight_checkdig(buf + 3, 10)) == check || magic));
break;
case ISSN:
strncpy(buf + 10, "00", 2); /* append 00 as the normal issue
* publication code */
strncpy(buf, "977", 3);
valid = (valid && ((rcheck = weight_checkdig(buf + 3, 8)) == check || magic));
break;
case UPC:
buf[2] = '0';
valid = (valid && ((rcheck = checkdig(buf + 2, 13)) == check || magic));
default:
break;
}
/* fix the check digit: */
for (aux1 = buf; *aux1 && *aux1 <= ' '; aux1++);
aux1[12] = checkdig(aux1, 13) + '0';
aux1[13] = '\0';
if (!valid && !magic)
goto eanbadcheck;
*result = str2ean(aux1);
*result |= valid ? 0 : 1;
return true;
eanbadcheck:
if (g_weak)
{ /* weak input mode is activated: */
/* set the "invalid-check-digit-on-input" flag */
*result = str2ean(aux1);
*result |= 1;
return true;
}
if (!errorOK)
{
if (rcheck == (unsigned) -1)
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid %s number: \"%s\"",
isn_names[accept], str)));
}
else
{
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid check digit for %s number: \"%s\", should be %c",
isn_names[accept], str, (rcheck == 10) ? ('X') : (rcheck + '0'))));
}
}
return false;
eaninvalid:
if (!errorOK)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("invalid input syntax for %s number: \"%s\"",
isn_names[accept], str)));
return false;
eanwrongtype:
if (!errorOK)
ereport(ERROR,
(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),
errmsg("cannot cast %s to %s for number: \"%s\"",
isn_names[type], isn_names[accept], str)));
return false;
eantoobig:
if (!errorOK)
ereport(ERROR,
(errcode(ERRCODE_NUMERIC_VALUE_OUT_OF_RANGE),
errmsg("value \"%s\" is out of range for %s type",
str, isn_names[accept])));
return false;
}
/*----------------------------------------------------------
* Exported routines.
*---------------------------------------------------------*/
void
initialize(void)
{
#ifdef ISN_DEBUG
if (!check_table(EAN13, EAN13_index))
elog(LOG, "EAN13 failed check");
if (!check_table(ISBN, ISBN_index))
elog(LOG, "ISBN failed check");
if (!check_table(ISMN, ISMN_index))
elog(LOG, "ISMN failed check");
if (!check_table(ISSN, ISSN_index))
elog(LOG, "ISSN failed check");
if (!check_table(UPC, UPC_index))
elog(LOG, "UPC failed check");
#endif
g_initialized = true;
}
/* isn_out
*/
PG_FUNCTION_INFO_V1(isn_out);
Datum
isn_out(PG_FUNCTION_ARGS)
{
ean13 val = PG_GETARG_EAN13(0);
char *result;
char buf[MAXEAN13LEN + 1];
(void) ean2string(val, false, buf, true);
result = pstrdup(buf);
PG_RETURN_CSTRING(result);
}
/* ean13_out
*/
PG_FUNCTION_INFO_V1(ean13_out);
Datum
ean13_out(PG_FUNCTION_ARGS)
{
ean13 val = PG_GETARG_EAN13(0);
char *result;
char buf[MAXEAN13LEN + 1];
(void) ean2string(val, false, buf, false);
result = pstrdup(buf);
PG_RETURN_CSTRING(result);
}
/* ean13_in
*/
PG_FUNCTION_INFO_V1(ean13_in);
Datum
ean13_in(PG_FUNCTION_ARGS)
{
const char *str = PG_GETARG_CSTRING(0);
ean13 result;
(void) string2ean(str, false, &result, EAN13);
PG_RETURN_EAN13(result);
}
/* isbn_in
*/
PG_FUNCTION_INFO_V1(isbn_in);
Datum
isbn_in(PG_FUNCTION_ARGS)
{
const char *str = PG_GETARG_CSTRING(0);
ean13 result;
(void) string2ean(str, false, &result, ISBN);
PG_RETURN_EAN13(result);
}