C++ (Cpp) per_get_many_bits Examples

Example #1

File: constr_SEQUENCE.c Project: mojmir-svoboda/BlackBoxTT

asn_dec_rval_t
SEQUENCE_decode_uper(Allocator * allocator, asn_codec_ctx_t *opt_codec_ctx, asn_TYPE_descriptor_t *td,
	asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
	asn_SEQUENCE_specifics_t *specs = (asn_SEQUENCE_specifics_t *)td->specifics;
	void *st = *sptr;	/* Target structure. */
	int extpresent;		/* Extension additions are present */
	uint8_t *opres;		/* Presence of optional root members */
	asn_per_data_t opmd;
	asn_dec_rval_t rv;
	int edx;

	(void)constraints;

	if(_ASN_STACK_OVERFLOW_CHECK(opt_codec_ctx))
		_ASN_DECODE_FAILED;

	if(!st) {
		st = *sptr = CXX_ALLOC_WRAP CALLOC(1, specs->struct_size);
		if(!st) _ASN_DECODE_FAILED;
	}

	ASN_DEBUG("Decoding %s as SEQUENCE (UPER)", td->name);

	/* Handle extensions */
	if(specs->ext_before >= 0) {
		extpresent = per_get_few_bits(pd, 1);
		if(extpresent < 0) _ASN_DECODE_STARVED;
	} else {
		extpresent = 0;
	}

	/* Prepare a place and read-in the presence bitmap */
	memset(&opmd, 0, sizeof(opmd));
	if(specs->roms_count) {
		opres = (uint8_t *)CXX_ALLOC_WRAP MALLOC(((specs->roms_count + 7) >> 3) + 1);
		if(!opres) _ASN_DECODE_FAILED;
		/* Get the presence map */
		if(per_get_many_bits(pd, opres, 0, specs->roms_count)) {
			CXX_ALLOC_WRAP FREEMEM(opres);
			_ASN_DECODE_STARVED;
		}
		opmd.buffer = opres;
		opmd.nbits = specs->roms_count;
		ASN_DEBUG("Read in presence bitmap for %s of %d bits (%x..)",
			td->name, specs->roms_count, *opres);
	} else {

Example #2

File: per_opentype.c Project: andrepuschmann/v2x-lte

static asn_dec_rval_t
uper_open_type_get_simple(asn_codec_ctx_t *ctx, asn_TYPE_descriptor_t *td,
	asn_per_constraints_t *constraints, void **sptr, asn_per_data_t *pd) {
	asn_dec_rval_t rv;
	ssize_t chunk_bytes;
	int repeat;
	uint8_t *buf = 0;
	size_t bufLen = 0;
	size_t bufSize = 0;
	asn_per_data_t spd;
	size_t padding;

	_ASN_STACK_OVERFLOW_CHECK(ctx);

	ASN_DEBUG("Getting open type %s...", td->name);

	do {
		chunk_bytes = uper_get_length(pd, -1, &repeat);
		if(chunk_bytes < 0) {
			FREEMEM(buf);
			_ASN_DECODE_STARVED;
		}
		if(bufLen + chunk_bytes > bufSize) {
			void *ptr;
			bufSize = chunk_bytes + (bufSize << 2);
			ptr = REALLOC(buf, bufSize);
			if(!ptr) {
				FREEMEM(buf);
				_ASN_DECODE_FAILED;
			}
			buf = ptr;
		}
		if(per_get_many_bits(pd, buf + bufLen, 0, chunk_bytes << 3)) {
			FREEMEM(buf);
			_ASN_DECODE_STARVED;
		}
		bufLen += chunk_bytes;
	} while(repeat);

	ASN_DEBUG("Getting open type %s encoded in %ld bytes", td->name,
		(long)bufLen);

	memset(&spd, 0, sizeof(spd));
	spd.buffer = buf;
	spd.nbits = bufLen << 3;

	ASN_DEBUG_INDENT_ADD(+4);
	rv = td->uper_decoder(ctx, td, constraints, sptr, &spd);
	ASN_DEBUG_INDENT_ADD(-4);

	if(rv.code == RC_OK) {
		/* Check padding validity */
		padding = spd.nbits - spd.nboff;
                if ((padding < 8 ||
		/* X.691#10.1.3 */
		(spd.nboff == 0 && spd.nbits == 8 && spd.buffer == buf)) &&
                    per_get_few_bits(&spd, padding) == 0) {
			/* Everything is cool */
			FREEMEM(buf);
			return rv;
		}
		FREEMEM(buf);
		if(padding >= 8) {
			ASN_DEBUG("Too large padding %d in open type", (int)padding);
			_ASN_DECODE_FAILED;
		} else {
			ASN_DEBUG("Non-zero padding");
			_ASN_DECODE_FAILED;
		}
	} else {
		FREEMEM(buf);
		/* rv.code could be RC_WMORE, nonsense in this context */
		rv.code = RC_FAIL; /* Noone would give us more */
	}

	return rv;
}