| /*- |
| * Copyright (c) 2004 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| /* |
| * Please read the NativeReal.h for the explanation wrt. differences between |
| * REAL and NativeReal. |
| * Basically, both are decoders and encoders of ASN.1 REAL 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 <NativeReal.h> |
| #include <REAL.h> |
| |
| /* |
| * NativeReal basic type description. |
| */ |
| static ber_tlv_tag_t asn_DEF_NativeReal_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (9 << 2)) |
| }; |
| asn_TYPE_descriptor_t asn_DEF_NativeReal = { |
| "REAL", /* The ASN.1 type is still REAL */ |
| "REAL", |
| NativeReal_free, |
| NativeReal_print, |
| asn_generic_no_constraint, |
| NativeReal_decode_ber, |
| NativeReal_encode_der, |
| NativeReal_decode_xer, |
| NativeReal_encode_xer, |
| 0, /* Use generic outmost tag fetcher */ |
| asn_DEF_NativeReal_tags, |
| sizeof(asn_DEF_NativeReal_tags) / sizeof(asn_DEF_NativeReal_tags[0]), |
| asn_DEF_NativeReal_tags, /* Same as above */ |
| sizeof(asn_DEF_NativeReal_tags) / sizeof(asn_DEF_NativeReal_tags[0]), |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| /* |
| * Decode REAL type. |
| */ |
| asn_dec_rval_t |
| NativeReal_decode_ber(asn_codec_ctx_t *opt_codec_ctx, |
| asn_TYPE_descriptor_t *td, |
| void **dbl_ptr, const void *buf_ptr, size_t size, int tag_mode) { |
| double *Dbl = (double *)*dbl_ptr; |
| asn_dec_rval_t rval; |
| ber_tlv_len_t length; |
| |
| /* |
| * If the structure is not there, allocate it. |
| */ |
| if(Dbl == NULL) { |
| *dbl_ptr = CALLOC(1, sizeof(*Dbl)); |
| Dbl = (double *)*dbl_ptr; |
| if(Dbl == NULL) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } |
| |
| ASN_DEBUG("Decoding %s as REAL (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 REAL: buf_ptr, length |
| * Fill the Dbl, at the same time checking for overflow. |
| * If overflow occured, return with RC_FAIL. |
| */ |
| { |
| REAL_t tmp; |
| double d; |
| (const uint8_t *)tmp.buf = (const uint8_t *)buf_ptr; |
| tmp.size = length; |
| |
| if(asn_REAL2double(&tmp, &d)) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| |
| *Dbl = d; |
| } |
| |
| rval.code = RC_OK; |
| rval.consumed += length; |
| |
| ASN_DEBUG("Took %ld/%ld bytes to encode %s (%f)", |
| (long)rval.consumed, (long)length, td->name, *Dbl); |
| |
| return rval; |
| } |
| |
| /* |
| * Encode the NativeReal using the standard REAL type DER encoder. |
| */ |
| asn_enc_rval_t |
| NativeReal_encode_der(asn_TYPE_descriptor_t *td, void *ptr, |
| int tag_mode, ber_tlv_tag_t tag, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| double Dbl = *(const double *)ptr; |
| asn_enc_rval_t erval; |
| REAL_t tmp; |
| |
| /* Prepare a temporary clean structure */ |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| if(asn_double2REAL(&tmp, Dbl)) { |
| erval.encoded = -1; |
| erval.failed_type = td; |
| erval.structure_ptr = ptr; |
| return erval; |
| } |
| |
| /* Encode a fake REAL */ |
| erval = der_encode_primitive(td, &tmp, tag_mode, tag, cb, app_key); |
| if(erval.encoded == -1) { |
| assert(erval.structure_ptr == &tmp); |
| erval.structure_ptr = ptr; |
| } |
| |
| /* Free possibly allocated members of the temporary structure */ |
| asn_DEF_REAL.free_struct(&asn_DEF_REAL, &tmp, 1); |
| |
| return erval; |
| } |
| |
| |
| |
| /* |
| * Decode the chunk of XML text encoding REAL. |
| */ |
| asn_dec_rval_t |
| NativeReal_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; |
| REAL_t *st = 0; |
| double *Dbl = (double *)*sptr; |
| |
| if(!Dbl) { |
| *sptr = CALLOC(1, sizeof(double)); |
| Dbl = (double *)*sptr; |
| if(!Dbl) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } |
| |
| rval = REAL_decode_xer(opt_codec_ctx, td, (void **)&st, opt_mname, |
| buf_ptr, size); |
| if(rval.code == RC_OK) { |
| if(asn_REAL2double(st, Dbl)) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| } |
| } else { |
| rval.consumed = 0; |
| } |
| asn_DEF_REAL.free_struct(&asn_DEF_REAL, st, 0); |
| return rval; |
| } |
| |
| asn_enc_rval_t |
| NativeReal_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) { |
| const double *Dbl = (const double *)sptr; |
| asn_enc_rval_t er; |
| |
| (void)ilevel; |
| |
| if(!Dbl) _ASN_ENCODE_FAILED; |
| |
| er.encoded = REAL__dump(*Dbl, flags & XER_F_CANONICAL, cb, app_key); |
| if(er.encoded < 0) _ASN_ENCODE_FAILED; |
| |
| return er; |
| } |
| |
| /* |
| * REAL specific human-readable output. |
| */ |
| int |
| NativeReal_print(asn_TYPE_descriptor_t *td, const void *sptr, int ilevel, |
| asn_app_consume_bytes_f *cb, void *app_key) { |
| const double *Dbl = (const double *)sptr; |
| |
| (void)td; /* Unused argument */ |
| (void)ilevel; /* Unused argument */ |
| |
| if(!Dbl) return (cb("<absent>", 8, app_key) < 0) ? -1 : 0; |
| |
| return (REAL__dump(*Dbl, 0, cb, app_key) < 0) ? -1 : 0; |
| } |
| |
| void |
| NativeReal_free(asn_TYPE_descriptor_t *td, void *ptr, int contents_only) { |
| |
| if(!td || !ptr) |
| return; |
| |
| ASN_DEBUG("Freeing %s as REAL (%d, %p, Native)", |
| td->name, contents_only, ptr); |
| |
| if(!contents_only) { |
| FREEMEM(ptr); |
| } |
| } |
| |