-/*-
- * Copyright (c) 2004, 2005, 2006 Lev Walkin <vlm@lionet.info>.
- * All rights reserved.
- * Redistribution and modifications are permitted subject to BSD license.
- */
-/*
- * Read the NativeInteger.h for the explanation wrt. differences between
- * INTEGER and NativeInteger.
- * Basically, both are decoders and encoders of ASN.1 INTEGER type, but this
- * implementation deals with the standard (machine-specific) representation
- * of them instead of using the platform-independent buffer.
- */
-#include <asn_internal.h>
-#include <NativeInteger.h>
-
-/*
- * NativeInteger basic type description.
- */
-static ber_tlv_tag_t asn_DEF_NativeInteger_tags[] = {
- (ASN_TAG_CLASS_UNIVERSAL | (2 << 2))
-};
-asn_TYPE_descriptor_t asn_DEF_NativeInteger = {
- "INTEGER", /* The ASN.1 type is still INTEGER */
- "INTEGER",
- NativeInteger_free,
- NativeInteger_print,
- asn_generic_no_constraint,
- NativeInteger_decode_ber,
- NativeInteger_encode_der,
- NativeInteger_decode_xer,
- NativeInteger_encode_xer,
- NativeInteger_decode_uper, /* Unaligned PER decoder */
- NativeInteger_encode_uper, /* Unaligned PER encoder */
- 0, /* Use generic outmost tag fetcher */
- asn_DEF_NativeInteger_tags,
- sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]),
- asn_DEF_NativeInteger_tags, /* Same as above */
- sizeof(asn_DEF_NativeInteger_tags) / sizeof(asn_DEF_NativeInteger_tags[0]),
- 0, /* No PER visible constraints */
- 0, 0, /* No members */
- 0 /* No specifics */
-};
-
-/*
- * Decode INTEGER type.
- */
-asn_dec_rval_t
-NativeInteger_decode_ber(asn_codec_ctx_t *opt_codec_ctx,
- asn_TYPE_descriptor_t *td,
- void **nint_ptr, const void *buf_ptr, size_t size, int tag_mode) {
- long *native = (long *)*nint_ptr;
- asn_dec_rval_t rval;
- ber_tlv_len_t length;
-
- /*
- * If the structure is not there, allocate it.
- */
- if(native == NULL) {
- native = (long *)(*nint_ptr = CALLOC(1, sizeof(*native)));
- if(native == NULL) {
- rval.code = RC_FAIL;
- rval.consumed = 0;
- return rval;
- }
- }
-
- ASN_DEBUG("Decoding %s as INTEGER (tm=%d)",
- td->name, tag_mode);
-
- /*
- * Check tags.
- */
- rval = ber_check_tags(opt_codec_ctx, td, 0, buf_ptr, size,
- tag_mode, 0, &length, 0);
- if(rval.code != RC_OK)
- return rval;
-
- ASN_DEBUG("%s length is %d bytes", td->name, (int)length);
-
- /*
- * Make sure we have this length.
- */
- buf_ptr = ((const char *)buf_ptr) + rval.consumed;
- size -= rval.consumed;
- if(length > (ber_tlv_len_t)size) {
- rval.code = RC_WMORE;
- rval.consumed = 0;
- return rval;
- }
-
- /*
- * ASN.1 encoded INTEGER: buf_ptr, length
- * Fill the native, at the same time checking for overflow.
- * If overflow occured, return with RC_FAIL.
- */
- {
- INTEGER_t tmp;
- union {
- const void *constbuf;
- void *nonconstbuf;
- } unconst_buf;
- long l;
-
- unconst_buf.constbuf = buf_ptr;
- tmp.buf = (uint8_t *)unconst_buf.nonconstbuf;
- tmp.size = length;
-
- if(asn_INTEGER2long(&tmp, &l)) {
- rval.code = RC_FAIL;
- rval.consumed = 0;
- return rval;
- }
-
- *native = l;
- }
-
- rval.code = RC_OK;
- rval.consumed += length;
-
- ASN_DEBUG("Took %ld/%ld bytes to encode %s (%ld)",
- (long)rval.consumed, (long)length, td->name, (long)*native);
-
- return rval;
-}
-
-/*
- * Encode the NativeInteger using the standard INTEGER type DER encoder.
- */
-asn_enc_rval_t
-NativeInteger_encode_der(asn_TYPE_descriptor_t *sd, void *ptr,
- int tag_mode, ber_tlv_tag_t tag,
- asn_app_consume_bytes_f *cb, void *app_key) {
- unsigned long native = *(unsigned long *)ptr; /* Disable sign ext. */
- asn_enc_rval_t erval;
- INTEGER_t tmp;
-
-#ifdef WORDS_BIGENDIAN /* Opportunistic optimization */
-
- tmp.buf = (uint8_t *)&native;
- tmp.size = sizeof(native);
-
-#else /* Works even if WORDS_BIGENDIAN is not set where should've been */
- uint8_t buf[sizeof(native)];
- uint8_t *p;
-
- /* Prepare a fake INTEGER */
- for(p = buf + sizeof(buf) - 1; p >= buf; p--, native >>= 8)
- *p = native;
-
- tmp.buf = buf;
- tmp.size = sizeof(buf);
-#endif /* WORDS_BIGENDIAN */
-
- /* Encode fake INTEGER */
- erval = INTEGER_encode_der(sd, &tmp, tag_mode, tag, cb, app_key);
- if(erval.encoded == -1) {
- assert(erval.structure_ptr == &tmp);
- erval.structure_ptr = ptr;
- }
- return erval;
-}
-
-/*
- * Decode the chunk of XML text encoding INTEGER.
- */
-asn_dec_rval_t
-NativeInteger_decode_xer(asn_codec_ctx_t *opt_codec_ctx,
- asn_TYPE_descriptor_t *td, void **sptr, const char *opt_mname,
- const void *buf_ptr, size_t size) {
- asn_dec_rval_t rval;
- INTEGER_t st;
- void *st_ptr = (void *)&st;
- long *native = (long *)*sptr;
-
- if(!native) {
- native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
- if(!native) _ASN_DECODE_FAILED;
- }
-
- memset(&st, 0, sizeof(st));
- rval = INTEGER_decode_xer(opt_codec_ctx, td, &st_ptr,
- opt_mname, buf_ptr, size);
- if(rval.code == RC_OK) {
- long l;
- if(asn_INTEGER2long(&st, &l)) {
- rval.code = RC_FAIL;
- rval.consumed = 0;
- } else {
- *native = l;
- }
- } else {
- /*
- * Cannot restart from the middle;
- * there is no place to save state in the native type.
- * Request a continuation from the very beginning.
- */
- rval.consumed = 0;
- }
- ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &st);
- return rval;
-}
-
-
-asn_enc_rval_t
-NativeInteger_encode_xer(asn_TYPE_descriptor_t *td, void *sptr,
- int ilevel, enum xer_encoder_flags_e flags,
- asn_app_consume_bytes_f *cb, void *app_key) {
- char scratch[32]; /* Enough for 64-bit int */
- asn_enc_rval_t er;
- const long *native = (const long *)sptr;
-
- (void)ilevel;
- (void)flags;
-
- if(!native) _ASN_ENCODE_FAILED;
-
- er.encoded = snprintf(scratch, sizeof(scratch), "%ld", *native);
- if(er.encoded <= 0 || (size_t)er.encoded >= sizeof(scratch)
- || cb(scratch, er.encoded, app_key) < 0)
- _ASN_ENCODE_FAILED;
-
- _ASN_ENCODED_OK(er);
-}
-
-asn_dec_rval_t
-NativeInteger_decode_uper(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_dec_rval_t rval;
- long *native = (long *)*sptr;
- INTEGER_t tmpint;
- void *tmpintptr = &tmpint;
-
- (void)opt_codec_ctx;
- ASN_DEBUG("Decoding NativeInteger %s (UPER)", td->name);
-
- if(!native) {
- native = (long *)(*sptr = CALLOC(1, sizeof(*native)));
- if(!native) _ASN_DECODE_FAILED;
- }
-
- memset(&tmpint, 0, sizeof tmpint);
- rval = INTEGER_decode_uper(opt_codec_ctx, td, constraints,
- &tmpintptr, pd);
- if(rval.code == RC_OK) {
- if(asn_INTEGER2long(&tmpint, native))
- rval.code = RC_FAIL;
- else
- ASN_DEBUG("NativeInteger %s got value %ld",
- td->name, *native);
- }
- ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
-
- return rval;
-}
-
-asn_enc_rval_t
-NativeInteger_encode_uper(asn_TYPE_descriptor_t *td,
- asn_per_constraints_t *constraints, void *sptr, asn_per_outp_t *po) {
- asn_enc_rval_t er;
- long native;
- INTEGER_t tmpint;
-
- if(!sptr) _ASN_ENCODE_FAILED;
-
- native = *(long *)sptr;
-
- ASN_DEBUG("Encoding NativeInteger %s %ld (UPER)", td->name, native);
-
- memset(&tmpint, 0, sizeof(tmpint));
- if(asn_long2INTEGER(&tmpint, native))
- _ASN_ENCODE_FAILED;
- er = INTEGER_encode_uper(td, constraints, &tmpint, po);
- ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_INTEGER, &tmpint);
- return er;
-}
-
-/*
- * INTEGER specific human-readable output.
- */
-int
-NativeInteger_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
- asn_app_consume_bytes_f *cb, void *app_key) {
- const long *native = (const long *)sptr;
-
- (void)td; /* Unused argument */
- (void)ilevel; /* Unused argument */
-
- if(native) {
- char scratch[32]; /* Enough for 64-bit int */
- int ret = snprintf(scratch, sizeof(scratch), "%ld", *native);
- assert(ret > 0 && (size_t)ret < sizeof(scratch));
- return (cb(scratch, ret, app_key) < 0) ? -1 : 0;
- } else {
- return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
- }
-}
-
-void
-NativeInteger_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) {
-
- if(!td || !ptr)
- return;
-
- ASN_DEBUG("Freeing %s as INTEGER (%d, %p, Native)",
- td->name, contents_only, ptr);
-
- if(!contents_only) {
- FREEMEM(ptr);
- }
-}
-
git.stg.codes / stg.git / blobdiff