| /*- |
| * Copyright (c) 2004, 2006 Lev Walkin <vlm@lionet.info>. All rights reserved. |
| * Redistribution and modifications are permitted subject to BSD license. |
| */ |
| /* |
| * 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> |
| #include <OCTET_STRING.h> |
| #include <math.h> |
| |
| #if defined(__clang__) |
| /* |
| * isnan() is defined using generic selections and won't compile in |
| * strict C89 mode because of too fancy system's standard library. |
| * However, prior to C11 the math had a perfectly working isnan() |
| * in the math library. |
| * Disable generic selection warning so we can test C89 mode with newer libc. |
| */ |
| #pragma clang diagnostic push |
| #pragma clang diagnostic ignored "-Wc11-extensions" |
| static int asn_isnan(double d) { |
| return isnan(d); |
| } |
| #pragma clang diagnostic pop |
| #else |
| #define asn_isnan(v) isnan(v) |
| #endif /* generic selections */ |
| |
| /* |
| * NativeReal basic type description. |
| */ |
| static const ber_tlv_tag_t asn_DEF_NativeReal_tags[] = { |
| (ASN_TAG_CLASS_UNIVERSAL | (9 << 2)) |
| }; |
| asn_TYPE_operation_t asn_OP_NativeReal = { |
| NativeReal_free, |
| NativeReal_print, |
| NativeReal_compare, |
| NativeReal_decode_ber, |
| NativeReal_encode_der, |
| NativeReal_decode_xer, |
| NativeReal_encode_xer, |
| #ifdef ASN_DISABLE_OER_SUPPORT |
| 0, |
| 0, |
| #else |
| 0, |
| 0, |
| #endif /* ASN_DISABLE_OER_SUPPORT */ |
| #ifdef ASN_DISABLE_PER_SUPPORT |
| 0, |
| 0, |
| #else |
| NativeReal_decode_uper, |
| NativeReal_encode_uper, |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| 0 /* Use generic outmost tag fetcher */ |
| }; |
| asn_TYPE_descriptor_t asn_DEF_NativeReal = { |
| "REAL", /* The ASN.1 type is still REAL */ |
| "REAL", |
| &asn_OP_NativeReal, |
| asn_generic_no_constraint, |
| 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, /* No OER visible constraints */ |
| 0, /* No PER visible constraints */ |
| 0, 0, /* No members */ |
| 0 /* No specifics */ |
| }; |
| |
| /* |
| * Decode REAL type. |
| */ |
| asn_dec_rval_t |
| NativeReal_decode_ber(const 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; |
| union { |
| const void *constbuf; |
| void *nonconstbuf; |
| } unconst_buf; |
| double d; |
| |
| unconst_buf.constbuf = buf_ptr; |
| tmp.buf = (uint8_t *)unconst_buf.nonconstbuf; |
| tmp.size = length; |
| |
| if(length < (ber_tlv_len_t)size) { |
| int ret; |
| uint8_t saved_byte = tmp.buf[tmp.size]; |
| tmp.buf[tmp.size] = '\0'; |
| ret = asn_REAL2double(&tmp, &d); |
| tmp.buf[tmp.size] = saved_byte; |
| if(ret) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } else if(length < 48 /* Enough for longish %f value. */) { |
| tmp.buf = alloca(length + 1); |
| tmp.size = length; |
| memcpy(tmp.buf, buf_ptr, length); |
| tmp.buf[tmp.size] = '\0'; |
| if(asn_REAL2double(&tmp, &d)) { |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| } else { |
| /* This should probably never happen: impractically long value */ |
| tmp.buf = CALLOC(1, length + 1); |
| tmp.size = length; |
| if(tmp.buf) memcpy(tmp.buf, buf_ptr, length); |
| if(!tmp.buf || asn_REAL2double(&tmp, &d)) { |
| FREEMEM(tmp.buf); |
| rval.code = RC_FAIL; |
| rval.consumed = 0; |
| return rval; |
| } |
| FREEMEM(tmp.buf); |
| } |
| |
| *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_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp); |
| |
| return erval; |
| } |
| |
| #ifndef ASN_DISABLE_PER_SUPPORT |
| |
| /* |
| * Decode REAL type using PER. |
| */ |
| asn_dec_rval_t |
| NativeReal_decode_uper(const asn_codec_ctx_t *opt_codec_ctx, |
| asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, void **dbl_ptr, |
| asn_per_data_t *pd) { |
| double *Dbl = (double *)*dbl_ptr; |
| asn_dec_rval_t rval; |
| REAL_t tmp; |
| void *ptmp = &tmp; |
| int ret; |
| |
| (void)constraints; |
| |
| /* |
| * If the structure is not there, allocate it. |
| */ |
| if(Dbl == NULL) { |
| *dbl_ptr = CALLOC(1, sizeof(*Dbl)); |
| Dbl = (double *)*dbl_ptr; |
| if(Dbl == NULL) |
| ASN__DECODE_FAILED; |
| } |
| |
| memset(&tmp, 0, sizeof(tmp)); |
| rval = OCTET_STRING_decode_uper(opt_codec_ctx, td, NULL, |
| &ptmp, pd); |
| if(rval.code != RC_OK) { |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp); |
| return rval; |
| } |
| |
| ret = asn_REAL2double(&tmp, Dbl); |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp); |
| if(ret) ASN__DECODE_FAILED; |
| |
| return rval; |
| } |
| |
| /* |
| * Encode the NativeReal using the OCTET STRING PER encoder. |
| */ |
| asn_enc_rval_t |
| NativeReal_encode_uper(asn_TYPE_descriptor_t *td, |
| const asn_per_constraints_t *constraints, void *sptr, |
| asn_per_outp_t *po) { |
| double Dbl = *(const double *)sptr; |
| asn_enc_rval_t erval; |
| REAL_t tmp; |
| |
| (void)constraints; |
| |
| /* Prepare a temporary clean structure */ |
| memset(&tmp, 0, sizeof(tmp)); |
| |
| if(asn_double2REAL(&tmp, Dbl)) |
| ASN__ENCODE_FAILED; |
| |
| /* Encode a DER REAL */ |
| erval = OCTET_STRING_encode_uper(td, NULL, &tmp, po); |
| if(erval.encoded == -1) |
| erval.structure_ptr = sptr; |
| |
| /* Free possibly allocated members of the temporary structure */ |
| ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp); |
| |
| return erval; |
| } |
| |
| #endif /* ASN_DISABLE_PER_SUPPORT */ |
| |
| /* |
| * Decode the chunk of XML text encoding REAL. |
| */ |
| asn_dec_rval_t |
| NativeReal_decode_xer(const 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; |
| REAL_t **stp = &st; |
| 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 **)stp, 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_STRUCT_FREE(asn_DEF_REAL, st); |
| 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; |
| |
| ASN__ENCODED_OK(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; |
| } |
| |
| int |
| NativeReal_compare(const asn_TYPE_descriptor_t *td, const void *aptr, |
| const void *bptr) { |
| const double *a = aptr; |
| const double *b = bptr; |
| (void)td; |
| |
| if(a && b) { |
| /* NaN sorted above everything else */ |
| if(asn_isnan(*a)) { |
| if(asn_isnan(*b)) { |
| return 0; |
| } else { |
| return -1; |
| } |
| } else if(asn_isnan(*b)) { |
| return 1; |
| } |
| /* Value comparison. */ |
| if(*a < *b) { |
| return -1; |
| } else if(*a > *b) { |
| return 1; |
| } else { |
| return 0; |
| } |
| } else if(!a) { |
| return -1; |
| } else { |
| return 1; |
| } |
| } |
| |
| void |
| NativeReal_free(const asn_TYPE_descriptor_t *td, void *ptr, |
| enum asn_struct_free_method method) { |
| if(!td || !ptr) |
| return; |
| |
| ASN_DEBUG("Freeing %s as REAL (%d, %p, Native)", |
| td->name, method, ptr); |
| |
| switch(method) { |
| case ASFM_FREE_EVERYTHING: |
| FREEMEM(ptr); |
| break; |
| case ASFM_FREE_UNDERLYING: |
| break; |
| case ASFM_FREE_UNDERLYING_AND_RESET: |
| memset(ptr, 0, sizeof(double)); |
| break; |
| } |
| } |
| |