[ViewVC] Diff of: cvs/Convert-BER-XS/XS.xs

Comparing Convert-BER-XS/XS.xs (file contents):
Revision 1.19 by root, Sat Apr 20 16:34:34 2019 UTC vs.
Revision 1.33 by root, Thu Apr 25 22:30:21 2019 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
		4
		5	#include <math.h>
4		6
5	// C99 required!	7	// C99 required!
6	// this is not just for comments, but also for	8	// this is not just for comments, but also for
7	// integer constant semantics,	9	// integer constant semantics,
8	// sscanf format modifiers and more.	10	// sscanf format modifiers and more.
58	ASN_CLASS_SHIFT = 6,	60	ASN_CLASS_SHIFT = 6,
59		61
60	// ASN_APPLICATION SNMP	62	// ASN_APPLICATION SNMP
61	SNMP_IPADDRESS = 0x00,	63	SNMP_IPADDRESS = 0x00,
62	SNMP_COUNTER32 = 0x01,	64	SNMP_COUNTER32 = 0x01,
		65	SNMP_GAUGE32 = 0x02,
63	SNMP_UNSIGNED32 = 0x02,	66	SNMP_UNSIGNED32 = 0x02,
64	SNMP_TIMETICKS = 0x03,	67	SNMP_TIMETICKS = 0x03,
65	SNMP_OPAQUE = 0x04,	68	SNMP_OPAQUE = 0x04,
66	SNMP_COUNTER64 = 0x06,	69	SNMP_COUNTER64 = 0x06,
67	};	70	};
68		71
		72	// tlow-level types this module can ecode the above (and more) into
69	enum {	73	enum {
70	BER_TYPE_BYTES,	74	BER_TYPE_BYTES,
71	BER_TYPE_UTF8,	75	BER_TYPE_UTF8,
72	BER_TYPE_UCS2,	76	BER_TYPE_UCS2,
73	BER_TYPE_UCS4,	77	BER_TYPE_UCS4,
…		…
79	BER_TYPE_REAL,	83	BER_TYPE_REAL,
80	BER_TYPE_IPADDRESS,	84	BER_TYPE_IPADDRESS,
81	BER_TYPE_CROAK,	85	BER_TYPE_CROAK,
82	};	86	};
83		87
		88	// tuple array indices
84	enum {	89	enum {
85	BER_CLASS = 0,	90	BER_CLASS = 0,
86	BER_TAG = 1,	91	BER_TAG = 1,
87	BER_FLAGS = 2,	92	BER_FLAGS = 2,
88	BER_DATA = 3,	93	BER_DATA = 3,
…		…
99		104
100	#if PERL_VERSION < 18	105	#if PERL_VERSION < 18
101	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)	106	# define utf8_to_uvchr_buf(s,e,l) utf8_to_uvchr (s, l)
102	#endif	107	#endif
103		108
		109	#ifndef SvREFCNT_inc_NN
		110	#define SvREFCNT_inc_NN(x) SvREFCNT_inc (x)
		111	#endif
		112	#ifndef SvREFCNT_dec_NN
		113	#define SvREFCNT_dec_NN(x) SvREFCNT_dec (x)
		114	#endif
		115
104	#if __GNUC__ >= 3	116	#if __GNUC__ >= 3
105	# define expect(expr,value) __builtin_expect ((expr), (value))	117	# define expect(expr,value) __builtin_expect ((expr), (value))
106	# define INLINE static inline	118	# define INLINE static inline
107	#else	119	#else
108	# define expect(expr,value) (expr)	120	# define expect(expr,value) (expr)
…		…
140	{	152	{
141	if (!SvOK (profile))	153	if (!SvOK (profile))
142	return default_profile;	154	return default_profile;
143		155
144	if (!SvROK (profile))	156	if (!SvROK (profile))
145	croak ("invalid profile");	157	croak ("Convert::BER::XS::Profile expected");
146		158
147	profile = SvRV (profile);	159	profile = SvRV (profile);
148		160
149	if (SvSTASH (profile) != profile_stash)	161	if (SvSTASH (profile) != profile_stash)
150	croak ("invalid profile object");	162	croak ("Convert::BER::XS::Profile expected");
151		163
152	return (void *)profile;	164	return (void *)profile;
153	}	165	}
154		166
155	static int	167	static int
…		…
227	}	239	}
228		240
229	// get_* functions fetch something from the buffer	241	// get_* functions fetch something from the buffer
230	// decode_* functions use get_* fun ctions to decode ber values	242	// decode_* functions use get_* fun ctions to decode ber values
231		243
		244	// get single octet
		245	static U8
		246	get_u8 (void)
		247	{
		248	if (cur == end)
		249	error ("unexpected end of message buffer");
		250
		251	return *cur++;
		252	}
		253
232	// get n octets	254	// get n octets
233	static U8 *	255	static U8 *
234	get_n (UV count)	256	get_n (UV count)
235	{	257	{
236	want (count);	258	want (count);
237	U8 *res = cur;	259	U8 *res = cur;
238	cur += count;	260	cur += count;
239	return res;	261	return res;
240	}	262	}
241		263
242	// get single octet
243	static U8
244	get_u8 (void)
245	{
246	if (cur == end)
247	error ("unexpected end of message buffer");
248
249	return *cur++;
250	}
251
252	// get ber-encoded integer (i.e. pack "w")	264	// get ber-encoded integer (i.e. pack "w")
253	static UV	265	static UV
254	get_w (void)	266	get_w (void)
255	{	267	{
256	UV res = 0;	268	UV res = 0;
		269	U8 c = get_u8 ();
		270
		271	if (expect_false (c == 0x80))
		272	error ("invalid BER padding (X.690 8.1.2.4.2, 8.19.2)");
257		273
258	for (;;)	274	for (;;)
259	{	275	{
260	U8 c = get_u8 ();	276	if (expect_false (res >> UVSIZE * 8 - 7))
		277	error ("BER variable length integer overflow");
		278
261	res = (res << 7) \| (c & 0x7f);	279	res = (res << 7) \| (c & 0x7f);
262		280
263	if (!(c & 0x80))	281	if (expect_true (!(c & 0x80)))
264	return res;	282	return res;
265	}
266	}
267		283
268	// get_w, but disallow padding	284	c = get_u8 ();
269	static UV	285	}
270	get_w_nopad (void)
271	{
272	U8 first = get_u8 ();
273
274	if (first == 0x80)
275	error ("illegal BER padding");
276
277	--cur;
278
279	return get_w ();
280	}	286	}
281		287
282	static UV	288	static UV
283	get_length (void)	289	get_length (void)
284	{	290	{
285	UV res = get_u8 ();	291	UV res = get_u8 ();
286		292
287	if (res & 0x80)	293	if (expect_false (res & 0x80))
288	{	294	{
289	int cnt = res & 0x7f;	295	U8 cnt = res & 0x7f;
		296
		297	// this genewrates quite ugly code, but the overhead
		298	// of copying the bytes for these lengths is probably so high
		299	// that a slightly inefficient get_length won't matter.
		300
		301	if (expect_false (cnt == 0))
		302	error ("invalid use of indefinite BER length form in primitive encoding (X.690 8.1.3.2)");
		303
		304	if (expect_false (cnt > UVSIZE))
		305	error ("BER value length too long (must fit into UV) or BER reserved value in length (X.690 8.1.3.5)");
		306
		307	want (cnt);
		308
290	res = 0;	309	res = 0;
291		310	do
292	switch (cnt)	311	res = (res << 8) \| *cur++;
293	{	312	while (--cnt);
294	case 0:
295	error ("indefinite ASN.1 lengths not supported");
296	return 0;
297
298	//case 0x80: // indefinite length
299
300	//case 0xff: reserved
301	default:
302	error ("ASN.1 length too long");
303	return 0;
304
305	case 8: res = (res << 8) \| get_u8 ();
306	case 7: res = (res << 8) \| get_u8 ();
307	case 6: res = (res << 8) \| get_u8 ();
308	case 5: res = (res << 8) \| get_u8 ();
309	case 4: res = (res << 8) \| get_u8 ();
310	case 3: res = (res << 8) \| get_u8 ();
311	case 2: res = (res << 8) \| get_u8 ();
312	case 1: res = (res << 8) \| get_u8 ();
313	}
314	}	313	}
315		314
316	return res;	315	return res;
317	}	316	}
318		317
319	static SV *	318	static SV *
320	decode_int (void)	319	decode_int (UV len)
321	{	320	{
322	UV len = get_length ();
323
324	if (!len)	321	if (!len)
325	{	322	error ("invalid BER_TYPE_INT length zero (X.690 8.3.1)");
326	error ("invalid integer length equal to zero");
327	return 0;
328	}
329		323
330	U8 *data = get_n (len);	324	U8 *data = get_n (len);
331		325
		326	if (expect_false (len > 1))
		327	{
		328	U16 mask = (data [0] << 8) \| data [1] & 0xff80;
		329
		330	if (expect_false (mask == 0xff80 \|\| mask == 0x0000))
		331	error ("invalid padding in BER_TYPE_INT (X.690 8.3.2)");
		332	}
		333
332	int negative = data [0] & 0x80;	334	int negative = data [0] & 0x80;
333		335
334	UV val = negative ? -1 : 0; // copy signbit to all bits	336	UV val = negative ? -1 : 0; // copy signbit to all bits
		337
		338	if (len > UVSIZE + (!negative && !*data))
		339	error ("BER_TYPE_INT overflow");
335		340
336	do	341	do
337	val = (val << 8) \| *data++;	342	val = (val << 8) \| *data++;
338	while (--len);	343	while (--len);
339		344
…		…
341	// but that's ok, as perl relies on it as well.	346	// but that's ok, as perl relies on it as well.
342	return negative ? newSViv ((IV)val) : newSVuv (val);	347	return negative ? newSViv ((IV)val) : newSVuv (val);
343	}	348	}
344		349
345	static SV *	350	static SV *
346	decode_data (void)	351	decode_data (UV len)
347	{	352	{
348	UV len = get_length ();
349	return newSVpvn ((char *)get_n (len), len);	353	return newSVpvn ((char *)get_n (len), len);
350	}	354	}
351		355
352	// helper for decode_object_identifier	356	// helper for decode_object_identifier
353	static char *	357	static char *
…		…
381		385
382	return buf;	386	return buf;
383	}	387	}
384		388
385	static SV *	389	static SV *
386	decode_oid (int relative)	390	decode_oid (UV len, int relative)
387	{	391	{
388	UV len = get_length ();
389
390	if (len <= 0)	392	if (len <= 0)
391	{	393	{
392	error ("OBJECT IDENTIFIER length equal to zero");	394	error ("BER_TYPE_OID length must not be zero");
393	return &PL_sv_undef;	395	return &PL_sv_undef;
394	}	396	}
395		397
396	U8 *end = cur + len;	398	U8 *end = cur + len;
397	UV w = get_w_nopad ();	399	UV w = get_w ();
398		400
399	static char oid[MAX_OID_STRLEN]; // static, becaueds too large for stack	401	static char oid[MAX_OID_STRLEN]; // static, because too large for stack
400	char *app = oid;	402	char *app = oid;
401		403
402	if (relative)	404	if (relative)
403	app = write_uv (app, w);	405	app = write_uv (app, w);
		406	else
		407	{
		408	UV w1, w2;
		409
404	else if (w < 2 * 40)	410	if (w < 2 * 40)
405	{	411	(w1 = w / 40), (w2 = w % 40);
		412	else
		413	(w1 = 2), (w2 = w - 2 * 40);
		414
406	app = write_uv (app, (U8)w / 40);	415	app = write_uv (app, w1);
407	*app++ = '.';	416	*app++ = '.';
408	app = write_uv (app, (U8)w % 40);
409	}
410	else
411	{
412	app = write_uv (app, 2);	417	app = write_uv (app, w2);
413	*app++ = '.';
414	app = write_uv (app, w - 2 * 40);
415	}	418	}
416		419
417	while (cur < end)	420	while (cur < end)
418	{	421	{
419	// we assume an oid component is never > 64 digits	422	// we assume an oid component is never > 64 digits
420	if (oid + sizeof (oid) - app < 64)	423	if (oid + sizeof (oid) - app < 64)
421	croak ("BER_TYPE_OID to long to decode");	424	croak ("BER_TYPE_OID to long to decode");
422		425
423	w = get_w_nopad ();	426	w = get_w ();
424	*app++ = '.';	427	*app++ = '.';
425	app = write_uv (app, w);	428	app = write_uv (app, w);
426	}	429	}
427		430
428	return newSVpvn (oid, app - oid);	431	return newSVpvn (oid, app - oid);
429	}	432	}
430		433
		434	// oh my, this is a total mess
		435	static SV *
		436	decode_real (UV len)
		437	{
		438	SV *res;
		439	U8 *beg = cur;
		440
		441	if (len == 0)
		442	res = newSVnv (0.);
		443	else
		444	{
		445	U8 info = get_u8 ();
		446
		447	if (info & 0x80)
		448	{
		449	// binary
		450	static const U8 base[] = { 2, 8, 16, 0 };
		451	NV S = info & 0x40 ? -1 : 1; // sign
		452	NV B = base [(info >> 4) & 3]; // base
		453	NV F = 1 << ((info >> 2) & 3); // scale factor ("shift")
		454	int L = info & 3; // exponent length
		455
		456	if (!B)
		457	croak ("BER_TYPE_REAL binary encoding uses invalid base (0x%02x)", info);
		458
		459	SAVETMPS;
		460
		461	SV *E = sv_2mortal (decode_int (L == 3 ? get_u8 () : L + 1));
		462	SV *M = sv_2mortal (decode_int (len - (cur - beg)));
		463
		464	res = newSVnv (S * SvNV (M) * F * Perl_pow (B, SvNV (E)));
		465
		466	FREETMPS;
		467	}
		468	else if (info & 0x40)
		469	{
		470	// SpecialRealValue
		471	U8 special = get_u8 ();
		472	NV val;
		473
		474	switch (special)
		475	{
		476	case 0x40: val = NV_INF; break;
		477	case 0x41: val = -NV_INF; break;
		478	case 0x42: val = NV_NAN; break;
		479	case 0x43: val = -(NV)0.; break;
		480
		481	default:
		482	croak ("BER_TYPE_REAL SpecialRealValues invalid encoding 0x%02x (X.690 8.5.9)", special);
		483	}
		484
		485	res = newSVnv (val);
		486	}
		487	else
		488	{
		489	// decimal
		490	dSP;
		491	SAVETMPS;
		492	PUSHMARK (SP);
		493	EXTEND (SP, 2);
		494	PUSHs (sv_2mortal (newSVcacheint (info & 0x3f)));
		495	PUSHs (sv_2mortal (newSVpvn (get_n (len - 1), len - 1)));
		496	PUTBACK;
		497	call_pv ("Convert::BER::XS::_decode_real_decimal", G_SCALAR);
		498	SPAGAIN;
		499	res = SvREFCNT_inc_NN (POPs);
		500	PUTBACK;
		501	FREETMPS;
		502	}
		503	}
		504
		505	if (cur - beg != len)
		506	{
		507	SvREFCNT_dec_NN (res);
		508	croak ("BER_TYPE_REAL invalid content length (X.690 8,5)");
		509	}
		510
		511	return res;
		512	}
		513
431	// TODO: this is unacceptably slow	514	// TODO: this is unacceptably slow
432	static SV *	515	static SV *
433	decode_ucs (int chrsize)	516	decode_ucs (UV len, int chrsize)
434	{	517	{
435	SV *res = NEWSV (0, 0);
436
437	UV len = get_length ();
438
439	if (len & (chrsize - 1))	518	if (len & (chrsize - 1))
440	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);	519	croak ("BER_TYPE_UCS has an invalid number of octets (%d)", len);
		520
		521	SV *res = NEWSV (0, 0);
441		522
442	while (len)	523	while (len)
443	{	524	{
444	U8 b1 = get_u8 ();	525	U8 b1 = get_u8 ();
445	U8 b2 = get_u8 ();	526	U8 b2 = get_u8 ();
…		…
476	int tag = identifier & ASN_TAG_MASK;	557	int tag = identifier & ASN_TAG_MASK;
477		558
478	if (tag == ASN_TAG_BER)	559	if (tag == ASN_TAG_BER)
479	tag = get_w ();	560	tag = get_w ();
480		561
481	if (tag == ASN_TAG_BER)
482	tag = get_w ();
483
484	if (constructed)	562	if (constructed)
485	{	563	{
		564	want (1);
		565	AV av = (AV )sv_2mortal ((SV *)newAV ());
		566
		567	if (expect_false (*cur == 0x80))
		568	{
		569	// indefinite length
		570	++cur;
		571
		572	for (;;)
		573	{
		574	want (2);
		575	if (!cur [0] && !cur [1])
		576	{
		577	cur += 2;
		578	break;
		579	}
		580
		581	av_push (av, decode_ber ());
		582	}
		583	}
		584	else
		585	{
		586	UV len = get_length ();
		587	UV seqend = (cur - buf) + len;
		588
		589	while (cur < buf + seqend)
		590	av_push (av, decode_ber ());
		591
		592	if (expect_false (cur > buf + seqend))
		593	croak ("CONSTRUCTED type %02x length overflow (0x%x 0x%x)\n", identifier, (int)(cur - buf), (int)seqend);
		594	}
		595
		596	res = newRV_inc ((SV *)av);
		597	}
		598	else
		599	{
486	UV len = get_length ();	600	UV len = get_length ();
487	UV seqend = (cur - buf) + len;
488	AV av = (AV )sv_2mortal ((SV *)newAV ());
489		601
490	while (cur < buf + seqend)
491	av_push (av, decode_ber ());
492
493	if (cur > buf + seqend)
494	croak ("constructed type %02x overflow (%x %x)\n", identifier, cur - buf, seqend);
495
496	res = newRV_inc ((SV *)av);
497	}
498	else
499	switch (profile_lookup (cur_profile, klass, tag))	602	switch (profile_lookup (cur_profile, klass, tag))
500	{	603	{
501	case BER_TYPE_NULL:	604	case BER_TYPE_NULL:
502	{	605	if (expect_false (len))
503	UV len = get_length ();
504
505	if (len)
506	croak ("BER_TYPE_NULL value with non-zero length %d encountered", len);	606	croak ("BER_TYPE_NULL value with non-zero length %d encountered (X.690 8.8.2)", len);
507		607
508	res = &PL_sv_undef;	608	res = &PL_sv_undef;
509	}
510	break;	609	break;
511		610
512	case BER_TYPE_BOOL:	611	case BER_TYPE_BOOL:
513	{
514	UV len = get_length ();
515
516	if (len != 1)	612	if (expect_false (len != 1))
517	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered", len);	613	croak ("BER_TYPE_BOOLEAN value with invalid length %d encountered (X.690 8.2.1)", len);
518		614
519	res = newSVcacheint (!!get_u8 ());	615	res = newSVcacheint (!!get_u8 ());
520	}
521	break;	616	break;
522		617
523	case BER_TYPE_OID:	618	case BER_TYPE_OID:
524	res = decode_oid (0);	619	res = decode_oid (len, 0);
525	break;	620	break;
526		621
527	case BER_TYPE_RELOID:	622	case BER_TYPE_RELOID:
528	res = decode_oid (1);	623	res = decode_oid (len, 1);
529	break;	624	break;
530		625
531	case BER_TYPE_INT:	626	case BER_TYPE_INT:
532	res = decode_int ();	627	res = decode_int (len);
533	break;	628	break;
534		629
535	case BER_TYPE_UTF8:	630	case BER_TYPE_UTF8:
536	res = decode_data ();	631	res = decode_data (len);
537	SvUTF8_on (res);	632	SvUTF8_on (res);
538	break;	633	break;
539		634
540	case BER_TYPE_BYTES:	635	case BER_TYPE_BYTES:
541	res = decode_data ();	636	res = decode_data (len);
542	break;	637	break;
543		638
544	case BER_TYPE_IPADDRESS:	639	case BER_TYPE_IPADDRESS:
545	{	640	{
546	UV len = get_length ();
547
548	if (len != 4)	641	if (len != 4)
549	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered", len);	642	croak ("BER_TYPE_IPADDRESS type with invalid length %d encountered (RFC 2578 7.1.5)", len);
550		643
551	U8 c1 = get_u8 ();	644	U8 *data = get_n (4);
552	U8 c2 = get_u8 ();	645	res = newSVpvf ("%d.%d.%d.%d", data [0], data [1], data [2], data [3]);
553	U8 c3 = get_u8 ();
554	U8 c4 = get_u8 ();
555
556	res = newSVpvf ("%d.%d.%d.%d", c1, c2, c3, c4);
557	}	646	}
558	break;	647	break;
559		648
560	case BER_TYPE_UCS2:	649	case BER_TYPE_UCS2:
561	res = decode_ucs (2);	650	res = decode_ucs (len, 2);
562	break;	651	break;
563		652
564	case BER_TYPE_UCS4:	653	case BER_TYPE_UCS4:
565	res = decode_ucs (4);	654	res = decode_ucs (len, 4);
566	break;	655	break;
567		656
568	case BER_TYPE_REAL:	657	case BER_TYPE_REAL:
		658	res = decode_real (len);
		659	break;
		660
569	case BER_TYPE_CROAK:	661	case BER_TYPE_CROAK:
		662	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		663
570	default:	664	default:
571	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);	665	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
572	}	666	}
		667	}
573		668
574	AV *av = newAV ();	669	AV *av = newAV ();
575	av_fill (av, BER_ARRAYSIZE - 1);	670	av_fill (av, BER_ARRAYSIZE - 1);
576	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);	671	AvARRAY (av)[BER_CLASS] = newSVcacheint (klass);
577	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);	672	AvARRAY (av)[BER_TAG ] = newSVcacheint (tag);
…		…
589	strlen_sum (STRLEN l1, STRLEN l2)	684	strlen_sum (STRLEN l1, STRLEN l2)
590	{	685	{
591	size_t sum = l1 + l2;	686	size_t sum = l1 + l2;
592		687
593	if (sum < (size_t)l2 \|\| sum != (size_t)(STRLEN)sum)	688	if (sum < (size_t)l2 \|\| sum != (size_t)(STRLEN)sum)
594	croak ("JSON::XS: string size overflow");	689	croak ("Convert::BER::XS: string size overflow");
595		690
596	return sum;	691	return sum;
597	}	692	}
598		693
599	static void	694	static void
…		…
664	}	759	}
665		760
666	static U8 *	761	static U8 *
667	put_length_at (UV val, U8 *cur)	762	put_length_at (UV val, U8 *cur)
668	{	763	{
669	if (val < 0x7fU)	764	if (val <= 0x7fU)
670	*cur++ = val;	765	*cur++ = val;
671	else	766	else
672	{	767	{
673	U8 *lenb = cur++;	768	U8 *lenb = cur++;
674		769
675	#if UVSIZE > 4	770	#if UVSIZE > 4
676	cur = val >> 56; cur += cur > 0;	771	cur = val >> 56; cur += val >= ((UV)1 << (8 7));
677	cur = val >> 48; cur += cur > 0;	772	cur = val >> 48; cur += val >= ((UV)1 << (8 6));
678	cur = val >> 40; cur += cur > 0;	773	cur = val >> 40; cur += val >= ((UV)1 << (8 5));
679	cur = val >> 32; cur += cur > 0;	774	cur = val >> 32; cur += val >= ((UV)1 << (8 4));
680	#endif	775	#endif
681	cur = val >> 24; cur += cur > 0;	776	cur = val >> 24; cur += val >= ((UV)1 << (8 3));
682	cur = val >> 16; cur += cur > 0;	777	cur = val >> 16; cur += val >= ((UV)1 << (8 2));
683	cur = val >> 8; cur += cur > 0;	778	cur = val >> 8; cur += val >= ((UV)1 << (8 1));
684	*cur = val ; cur += 1;	779	*cur = val ; cur += 1;
685		780
686	*lenb = 0x80 + cur - lenb - 1;	781	*lenb = 0x80 + cur - lenb - 1;
687	}	782	}
688		783
…		…
690	}	785	}
691		786
692	static void	787	static void
693	put_length (UV val)	788	put_length (UV val)
694	{	789	{
695	need (5 + val);	790	need (9 + val);
696	cur = put_length_at (val, cur);	791	cur = put_length_at (val, cur);
697	}	792	}
698		793
699	// return how many bytes the encoded length requires	794	// return how many bytes the encoded length requires
700	static int length_length (UV val)	795	static int length_length (UV val)
701	{	796	{
702	return val < 0x7fU	797	// use hashing with a DeBruin sequence, anyone?
		798	return expect_true (val <= 0x7fU)
703	? 1	799	? 1
704	: 2	800	: 2
705	+ (val > 0xffU)	801	+ (val > 0x000000000000ffU)
706	+ (val > 0xffffU)	802	+ (val > 0x0000000000ffffU)
707	+ (val > 0xffffffU)	803	+ (val > 0x00000000ffffffU)
708	#if UVSIZE > 4	804	#if UVSIZE > 4
709	+ (val > 0xffffffffU)	805	+ (val > 0x000000ffffffffU)
710	+ (val > 0xffffffffffU)	806	+ (val > 0x0000ffffffffffU)
711	+ (val > 0xffffffffffffU)	807	+ (val > 0x00ffffffffffffU)
712	+ (val > 0xffffffffffffffU)	808	+ (val > 0xffffffffffffffU)
713	#endif	809	#endif
714	;	810	;
715	}	811	}
716		812
…		…
852	}	948	}
853		949
854	len_fixup (mark);	950	len_fixup (mark);
855	}	951	}
856		952
857	// check whether an SV is a BER tuple and returns its AV *	953	static void
858	static AV *	954	encode_real (SV *data)
859	ber_tuple (SV *tuple)
860	{	955	{
861	SV *rv;	956	NV nv = SvNV (data);
862		957
863	if (expect_false (!SvROK (tuple) \|\| SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))	958	if (expect_false (nv == (NV)0.))
864	croak ("BER tuple must be array-reference");	959	{
		960	if (signbit (nv))
		961	{
		962	// negative zero
		963	need (3);
		964	*cur++ = 2;
		965	*cur++ = 0x40;
		966	*cur++ = 0x43;
		967	}
		968	else
		969	{
		970	// positive zero
		971	need (1);
		972	*cur++ = 0;
		973	}
		974	}
		975	else if (expect_false (Perl_isinf (nv)))
		976	{
		977	need (3);
		978	*cur++ = 2;
		979	*cur++ = 0x40;
		980	*cur++ = nv < (NV)0. ? 0x41 : 0x40;
		981	}
		982	else if (expect_false (Perl_isnan (nv)))
		983	{
		984	need (3);
		985	*cur++ = 2;
		986	*cur++ = 0x40;
		987	*cur++ = 0x42;
		988	}
		989	else
		990	{
		991	// use decimal encoding
		992	dSP;
		993	SAVETMPS;
		994	PUSHMARK (SP);
		995	EXTEND (SP, 2);
		996	PUSHs (data);
		997	PUSHs (sv_2mortal (newSVcacheint (NV_DIG)));
		998	PUTBACK;
		999	call_pv ("Convert::BER::XS::_encode_real_decimal", G_SCALAR);
		1000	SPAGAIN;
865		1001
866	if (expect_false (SvRMAGICAL (rv)))	1002	SV *sv = POPs;
867	croak ("BER tuple must not be tied");	1003	STRLEN l;
		1004	char *f = SvPV (sv, l);
868		1005
869	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))	1006	put_length (l);
870	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);	1007	memcpy (cur, f, l);
		1008	cur += l;
871		1009
872	return (AV *)rv;	1010	PUTBACK;
		1011	FREETMPS;
		1012	}
873	}	1013	}
874		1014
875	static void	1015	static void
876	encode_ucs (SV *data, int chrsize)	1016	encode_ucs (SV *data, int chrsize)
877	{	1017	{
…		…
897		1037
898	*cur++ = uchr >> 8;	1038	*cur++ = uchr >> 8;
899	*cur++ = uchr;	1039	*cur++ = uchr;
900	}	1040	}
901	}	1041	}
		1042
		1043	// check whether an SV is a BER tuple and returns its AV *
		1044	static AV *
		1045	ber_tuple (SV *tuple)
		1046	{
		1047	SV *rv;
		1048
		1049	if (expect_false (!SvROK (tuple) \|\| SvTYPE ((rv = SvRV (tuple))) != SVt_PVAV))
		1050	croak ("BER tuple must be array-reference");
		1051
		1052	if (expect_false (SvRMAGICAL (rv)))
		1053	croak ("BER tuple must not be tied");
		1054
		1055	if (expect_false (AvFILL ((AV *)rv) != BER_ARRAYSIZE - 1))
		1056	croak ("BER tuple must contain exactly %d elements, not %d", BER_ARRAYSIZE, AvFILL ((AV *)rv) + 1);
		1057
		1058	return (AV *)rv;
		1059	}
		1060
902	static void	1061	static void
903	encode_ber (SV *tuple)	1062	encode_ber (SV *tuple)
904	{	1063	{
905	AV *av = ber_tuple (tuple);	1064	AV *av = ber_tuple (tuple);
906		1065
…		…
925	// and adjust later	1084	// and adjust later
926	need (1);	1085	need (1);
927	STRLEN mark = len_fixup_mark ();	1086	STRLEN mark = len_fixup_mark ();
928		1087
929	if (expect_false (!SvROK (data) \|\| SvTYPE (SvRV (data)) != SVt_PVAV))	1088	if (expect_false (!SvROK (data) \|\| SvTYPE (SvRV (data)) != SVt_PVAV))
930	croak ("BER constructed data must be array-reference");	1089	croak ("BER CONSTRUCTED data must be array-reference");
931		1090
932	AV av = (AV )SvRV (data);	1091	AV av = (AV )SvRV (data);
933	int fill = AvFILL (av);	1092	int fill = AvFILL (av);
934		1093
935	if (expect_false (SvRMAGICAL (av)))	1094	if (expect_false (SvRMAGICAL (av)))
936	croak ("BER constructed data must not be tied");	1095	croak ("BER CONSTRUCTED data must not be tied");
937		1096
938	int i;	1097	int i;
939	for (i = 0; i <= fill; ++i)	1098	for (i = 0; i <= fill; ++i)
940	encode_ber (AvARRAY (av)[i]);	1099	encode_ber (AvARRAY (av)[i]);
941		1100
…		…
996	case BER_TYPE_UCS4:	1155	case BER_TYPE_UCS4:
997	encode_ucs (data, 4);	1156	encode_ucs (data, 4);
998	break;	1157	break;
999		1158
1000	case BER_TYPE_REAL:	1159	case BER_TYPE_REAL:
		1160	encode_real (data);
		1161	break;
		1162
1001	case BER_TYPE_CROAK:	1163	case BER_TYPE_CROAK:
		1164	croak ("class/tag %d/%d mapped to BER_TYPE_CROAK", klass, tag);
		1165
1002	default:	1166	default:
1003	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);	1167	croak ("unconfigured/unsupported class/tag %d/%d", klass, tag);
1004	}	1168	}
1005		1169
1006	}	1170	}
…		…
1078	const_iv (BER_TYPE_IPADDRESS)	1242	const_iv (BER_TYPE_IPADDRESS)
1079	const_iv (BER_TYPE_CROAK)	1243	const_iv (BER_TYPE_CROAK)
1080		1244
1081	const_iv (SNMP_IPADDRESS)	1245	const_iv (SNMP_IPADDRESS)
1082	const_iv (SNMP_COUNTER32)	1246	const_iv (SNMP_COUNTER32)
		1247	const_iv (SNMP_GAUGE32)
1083	const_iv (SNMP_UNSIGNED32)	1248	const_iv (SNMP_UNSIGNED32)
1084	const_iv (SNMP_TIMETICKS)	1249	const_iv (SNMP_TIMETICKS)
1085	const_iv (SNMP_OPAQUE)	1250	const_iv (SNMP_OPAQUE)
1086	const_iv (SNMP_COUNTER64)	1251	const_iv (SNMP_COUNTER64)
1087	};	1252	};
1088		1253
1089	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)	1254	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1090	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));	1255	newCONSTSUB (stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1091	}	1256	}
1092		1257
1093	SV *	1258	void
1094	ber_decode (SV ber, SV profile = &PL_sv_undef)	1259	ber_decode (SV ber, SV profile = &PL_sv_undef)
		1260	ALIAS:
		1261	ber_decode_prefix = 1
1095	CODE:	1262	PPCODE:
1096	{	1263	{
1097	cur_profile = SvPROFILE (profile);	1264	cur_profile = SvPROFILE (profile);
1098	STRLEN len;	1265	STRLEN len;
1099	buf = (U8 *)SvPVbyte (ber, len);	1266	buf = (U8 *)SvPVbyte (ber, len);
1100	cur = buf;	1267	cur = buf;
1101	end = buf + len;	1268	end = buf + len;
1102		1269
		1270	PUTBACK;
1103	RETVAL = decode_ber ();	1271	SV *tuple = decode_ber ();
		1272	SPAGAIN;
		1273
		1274	EXTEND (SP, 2);
		1275	PUSHs (sv_2mortal (tuple));
		1276
		1277	if (ix)
		1278	PUSHs (sv_2mortal (newSViv (cur - buf)));
		1279	else if (cur != end)
		1280	error ("trailing garbage after BER value");
1104	}	1281	}
1105	OUTPUT: RETVAL
1106		1282
1107	void	1283	void
1108	ber_is (SV tuple, SV klass = &PL_sv_undef, SV tag = &PL_sv_undef, SV flags = &PL_sv_undef, SV *data = &PL_sv_undef)	1284	ber_is (SV tuple, SV klass = &PL_sv_undef, SV tag = &PL_sv_undef, SV flags = &PL_sv_undef, SV *data = &PL_sv_undef)
1109	PPCODE:	1285	PPCODE:
1110	{	1286	{
…		…
1186	cur_profile = SvPROFILE (profile);	1362	cur_profile = SvPROFILE (profile);
1187	buf_sv = sv_2mortal (NEWSV (0, 256));	1363	buf_sv = sv_2mortal (NEWSV (0, 256));
1188	SvPOK_only (buf_sv);	1364	SvPOK_only (buf_sv);
1189	set_buf (buf_sv);	1365	set_buf (buf_sv);
1190		1366
		1367	PUTBACK;
1191	encode_ber (tuple);	1368	encode_ber (tuple);
		1369	SPAGAIN;
1192		1370
1193	SvCUR_set (buf_sv, cur - buf);	1371	SvCUR_set (buf_sv, cur - buf);
1194	XPUSHs (buf_sv);	1372	XPUSHs (buf_sv);
1195	}	1373	}
1196		1374

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Comparing Convert-BER-XS/XS.xs (file contents): Revision 1.19 by root, Sat Apr 20 16:34:34 2019 UTC vs. Revision 1.33 by root, Thu Apr 25 22:30:21 2019 UTC

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Comparing Convert-BER-XS/XS.xs (file contents):
Revision 1.19 by root, Sat Apr 20 16:34:34 2019 UTC vs.
Revision 1.33 by root, Thu Apr 25 22:30:21 2019 UTC