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asn1c/skeletons/NativeReal.c

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/*-
* Copyright (c) 2004-2017 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>
#include <float.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
NativeReal_decode_oer,
NativeReal_encode_oer,
#endif /* ASN_DISABLE_OER_SUPPORT */
#ifdef ASN_DISABLE_PER_SUPPORT
0,
0,
#else
NativeReal_decode_uper,
NativeReal_encode_uper,
#endif /* ASN_DISABLE_PER_SUPPORT */
NativeReal_random_fill,
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_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, asn_generic_no_constraint },
0, 0, /* No members */
0 /* No specifics */
};
static size_t NativeReal__float_size(const asn_TYPE_descriptor_t *td);
static double NativeReal__get_double(const asn_TYPE_descriptor_t *td,
const void *ptr);
static ssize_t NativeReal__set(const asn_TYPE_descriptor_t *td, void **sptr,
double d);
/*
* Decode REAL type.
*/
asn_dec_rval_t
NativeReal_decode_ber(const asn_codec_ctx_t *opt_codec_ctx,
const asn_TYPE_descriptor_t *td, void **sptr,
const void *buf_ptr, size_t size, int tag_mode) {
asn_dec_rval_t rval;
ber_tlv_len_t length;
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;
assert(length >= 0); /* Ensured by ber_check_tags */
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.
*/
{
uint8_t scratch[24]; /* Longer than %.16f in decimal */
REAL_t tmp;
double d;
int ret;
if((size_t)length < sizeof(scratch)) {
tmp.buf = scratch;
tmp.size = length;
} else {
/* This rarely happens: impractically long value */
tmp.buf = CALLOC(1, length + 1);
tmp.size = length;
if(!tmp.buf) {
rval.code = RC_FAIL;
rval.consumed = 0;
return rval;
}
}
memcpy(tmp.buf, buf_ptr, length);
tmp.buf[length] = '\0';
ret = asn_REAL2double(&tmp, &d);
if(tmp.buf != scratch) FREEMEM(tmp.buf);
if(ret) {
rval.code = RC_FAIL;
rval.consumed = 0;
return rval;
}
if(NativeReal__set(td, sptr, d) < 0)
ASN__DECODE_FAILED;
}
rval.code = RC_OK;
rval.consumed += length;
ASN_DEBUG("Took %ld/%ld bytes to encode %s", (long)rval.consumed,
(long)length, td->name);
return rval;
}
/*
* Encode the NativeReal using the standard REAL type DER encoder.
*/
asn_enc_rval_t
NativeReal_encode_der(const asn_TYPE_descriptor_t *td, const void *sptr,
int tag_mode, ber_tlv_tag_t tag,
asn_app_consume_bytes_f *cb, void *app_key) {
double d = NativeReal__get_double(td, sptr);
asn_enc_rval_t erval;
REAL_t tmp;
/* Prepare a temporary clean structure */
memset(&tmp, 0, sizeof(tmp));
if(asn_double2REAL(&tmp, d))
ASN__ENCODE_FAILED;
/* 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 = sptr;
}
/* 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,
const asn_TYPE_descriptor_t *td,
const asn_per_constraints_t *constraints, void **sptr,
asn_per_data_t *pd) {
asn_dec_rval_t rval;
double d;
REAL_t tmp;
void *ptmp = &tmp;
int ret;
(void)constraints;
memset(&tmp, 0, sizeof(tmp));
rval = OCTET_STRING_decode_uper(opt_codec_ctx, &asn_DEF_REAL,
NULL, &ptmp, pd);
if(rval.code != RC_OK) {
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp);
return rval;
}
ret = asn_REAL2double(&tmp, &d);
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp);
if(ret) ASN__DECODE_FAILED;
if(NativeReal__set(td, sptr, d) < 0 )
ASN__DECODE_FAILED;
return rval;
}
/*
* Encode the NativeReal using the OCTET STRING PER encoder.
*/
asn_enc_rval_t
NativeReal_encode_uper(const asn_TYPE_descriptor_t *td,
const asn_per_constraints_t *constraints,
const void *sptr, asn_per_outp_t *po) {
double d = NativeReal__get_double(td, 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, d))
ASN__ENCODE_FAILED;
/* Encode a DER REAL */
erval = OCTET_STRING_encode_uper(&asn_DEF_REAL, 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 */
#ifndef ASN_DISABLE_OER_SUPPORT
/*
* Swap bytes from/to network, if local is little-endian.
* Unused endianness sections are likely removed at compile phase.
*/
static void
NativeReal__network_swap(size_t float_size, const void *srcp, uint8_t *dst) {
const uint8_t *src = srcp;
double test = -0.0;
int float_big_endian = *(const char *)&test != 0;
/* In lieu of static_assert(sizeof(double) == 8) */
static const char sizeof_double_is_8_a[sizeof(double)-7] CC_NOTUSED;
static const char sizeof_double_is_8_b[9-sizeof(double)] CC_NOTUSED;
/* In lieu of static_assert(sizeof(sizeof) == 4) */
static const char sizeof_float_is_4_a[sizeof(float)-3] CC_NOTUSED;
static const char sizeof_float_is_4_b[5-sizeof(float)] CC_NOTUSED;
switch(float_size) {
case sizeof(double):
assert(sizeof(double) == 8);
if(float_big_endian) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
dst[4] = src[4];
dst[5] = src[5];
dst[6] = src[6];
dst[7] = src[7];
} else {
dst[0] = src[7];
dst[1] = src[6];
dst[2] = src[5];
dst[3] = src[4];
dst[4] = src[3];
dst[5] = src[2];
dst[6] = src[1];
dst[7] = src[0];
}
return;
case sizeof(float):
assert(sizeof(float) == 4);
if(float_big_endian) {
dst[0] = src[0];
dst[1] = src[1];
dst[2] = src[2];
dst[3] = src[3];
} else {
dst[0] = src[3];
dst[1] = src[2];
dst[2] = src[1];
dst[3] = src[0];
}
return;
}
}
/*
* Encode as Canonical OER.
*/
asn_enc_rval_t
NativeReal_encode_oer(const asn_TYPE_descriptor_t *td,
const asn_oer_constraints_t *constraints,
const void *sptr, asn_app_consume_bytes_f *cb,
void *app_key) {
asn_enc_rval_t er = {0, 0, 0};
if(!constraints) constraints = td->encoding_constraints.oer_constraints;
if(constraints && constraints->value.width != 0) {
/* X.696 IEEE 754 binary32 and binary64 encoding */
uint8_t scratch[sizeof(double)];
const asn_NativeReal_specifics_t *specs =
(const asn_NativeReal_specifics_t *)td->specifics;
size_t wire_size = constraints->value.width;
if(specs ? (wire_size == specs->float_size)
: (wire_size == sizeof(double))) {
/*
* Our representation matches the wire, modulo endianness.
* That was the whole point of compact encoding!
*/
} else {
assert((wire_size == sizeof(double))
|| (specs && specs->float_size == wire_size));
ASN__ENCODE_FAILED;
}
/*
* The X.696 standard doesn't specify endianness, neither is IEEE 754.
* So we assume the network format is big endian.
*/
NativeReal__network_swap(wire_size, sptr, scratch);
if(cb(scratch, wire_size, app_key) < 0) {
ASN__ENCODE_FAILED;
} else {
er.encoded = wire_size;
ASN__ENCODED_OK(er);
}
} else {
double d = NativeReal__get_double(td, sptr);
ssize_t len_len;
REAL_t tmp;
/* Prepare a temporary clean structure */
memset(&tmp, 0, sizeof(tmp));
if(asn_double2REAL(&tmp, d)) {
ASN__ENCODE_FAILED;
}
/* Encode a fake REAL */
len_len = oer_serialize_length(tmp.size, cb, app_key);
if(len_len < 0 || cb(tmp.buf, tmp.size, app_key) < 0) {
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp);
ASN__ENCODE_FAILED;
} else {
er.encoded = len_len + tmp.size;
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &tmp);
ASN__ENCODED_OK(er);
}
}
}
asn_dec_rval_t
NativeReal_decode_oer(const asn_codec_ctx_t *opt_codec_ctx,
const asn_TYPE_descriptor_t *td,
const asn_oer_constraints_t *constraints, void **sptr,
const void *ptr, size_t size) {
asn_dec_rval_t ok = {RC_OK, 0};
double d;
ssize_t len_len;
size_t real_body_len;
(void)opt_codec_ctx;
if(!constraints) constraints = td->encoding_constraints.oer_constraints;
if(constraints && constraints->value.width != 0) {
/* X.696 IEEE 754 binary32 and binary64 encoding */
uint8_t scratch[sizeof(double)];
size_t wire_size = constraints->value.width;
if(size < wire_size)
ASN__DECODE_STARVED;
/*
* The X.696 standard doesn't specify endianness, neither is IEEE 754.
* So we assume the network format is big endian.
*/
NativeReal__network_swap(wire_size, ptr, scratch);
switch(wire_size) {
case sizeof(double):
{
double tmp;
memcpy(&tmp, scratch, sizeof(double));
if(NativeReal__set(td, sptr, tmp) < 0)
ASN__DECODE_FAILED;
}
break;
case sizeof(float):
{
float tmp;
memcpy(&tmp, scratch, sizeof(float));
if(NativeReal__set(td, sptr, tmp) < 0)
ASN__DECODE_FAILED;
}
break;
default:
ASN__DECODE_FAILED;
}
ok.consumed = wire_size;
return ok;
}
len_len = oer_fetch_length(ptr, size, &real_body_len);
if(len_len < 0) ASN__DECODE_FAILED;
if(len_len == 0) ASN__DECODE_STARVED;
ptr = (const char *)ptr + len_len;
size -= len_len;
if(real_body_len > size) ASN__DECODE_STARVED;
{
uint8_t scratch[24]; /* Longer than %.16f in decimal */
REAL_t tmp;
int ret;
if(real_body_len < sizeof(scratch)) {
tmp.buf = scratch;
tmp.size = real_body_len;
} else {
/* This rarely happens: impractically long value */
tmp.buf = CALLOC(1, real_body_len + 1);
tmp.size = real_body_len;
if(!tmp.buf) {
ASN__DECODE_FAILED;
}
}
memcpy(tmp.buf, ptr, real_body_len);
tmp.buf[real_body_len] = '\0';
ret = asn_REAL2double(&tmp, &d);
if(tmp.buf != scratch) FREEMEM(tmp.buf);
if(ret) {
ASN_DEBUG("REAL decoded in %zu bytes, but can't convert t double",
real_body_len);
ASN__DECODE_FAILED;
}
}
if(NativeReal__set(td, sptr, d) < 0)
ASN__DECODE_FAILED;
ok.consumed = len_len + real_body_len;
return ok;
}
#endif /* ASN_DISABLE_OER_SUPPORT */
/*
* Decode the chunk of XML text encoding REAL.
*/
asn_dec_rval_t
NativeReal_decode_xer(const asn_codec_ctx_t *opt_codec_ctx,
const 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, 0 };
REAL_t *stp = &st;
rval = REAL_decode_xer(opt_codec_ctx, td, (void **)&stp, opt_mname,
buf_ptr, size);
if(rval.code == RC_OK) {
double d;
if(asn_REAL2double(&st, &d) || NativeReal__set(td, sptr, d) < 0) {
rval.code = RC_FAIL;
rval.consumed = 0;
}
} else {
/* Convert all errors into RC_FAIL */
rval.consumed = 0;
}
ASN_STRUCT_FREE_CONTENTS_ONLY(asn_DEF_REAL, &st);
return rval;
}
asn_enc_rval_t
NativeReal_encode_xer(const asn_TYPE_descriptor_t *td, const void *sptr,
int ilevel, enum xer_encoder_flags_e flags,
asn_app_consume_bytes_f *cb, void *app_key) {
double d = NativeReal__get_double(td, sptr);
asn_enc_rval_t er;
(void)ilevel;
er.encoded = REAL__dump(d, 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(const asn_TYPE_descriptor_t *td, const void *sptr, int ilevel,
asn_app_consume_bytes_f *cb, void *app_key) {
(void)ilevel; /* Unused argument */
if(sptr) {
double d = NativeReal__get_double(td, sptr);
return (REAL__dump(d, 0, cb, app_key) < 0) ? -1 : 0;
} else {
return (cb("<absent>", 8, app_key) < 0) ? -1 : 0;
}
}
int
NativeReal_compare(const asn_TYPE_descriptor_t *td, const void *aptr,
const void *bptr) {
if(aptr && bptr) {
double a = NativeReal__get_double(td, aptr);
double b = NativeReal__get_double(td, bptr);
/* 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(!aptr) {
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: {
const asn_NativeReal_specifics_t *specs;
size_t float_size;
specs = (const asn_NativeReal_specifics_t *)td->specifics;
float_size = specs ? specs->float_size : sizeof(double);
memset(ptr, 0, float_size);
} break;
}
}
asn_random_fill_result_t
NativeReal_random_fill(const asn_TYPE_descriptor_t *td, void **sptr,
const asn_encoding_constraints_t *constraints,
size_t max_length) {
asn_random_fill_result_t result_ok = {ARFILL_OK, 0};
asn_random_fill_result_t result_failed = {ARFILL_FAILED, 0};
asn_random_fill_result_t result_skipped = {ARFILL_SKIPPED, 0};
#ifndef INFINITY
#define INFINITY (1.0/0.0)
#endif
#ifndef NAN
#define NAN (0.0/0.0)
#endif
static const double double_values[] = {
-M_E, M_E, -M_PI, M_PI, /* Better precision than with floats */
-1E+308, 1E+308,
/* 2^51 */
-2251799813685248.0, 2251799813685248.0,
/* 2^52 */
-4503599627370496.0, 4503599627370496.0,
/* 2^100 */
-1267650600228229401496703205376.0, 1267650600228229401496703205376.0,
-DBL_MIN, DBL_MIN,
-DBL_MAX, DBL_MAX,
#ifdef DBL_TRUE_MIN
-DBL_TRUE_MIN, DBL_TRUE_MIN
#endif
};
static const float float_values[] = {
0, -0.0, -1, 1, -M_E, M_E, -3.14, 3.14, -M_PI, M_PI, -255, 255,
-FLT_MIN, FLT_MIN,
-FLT_MAX, FLT_MAX,
#ifdef FLT_TRUE_MIN
-FLT_TRUE_MIN, FLT_TRUE_MIN,
#endif
INFINITY, -INFINITY, NAN
};
ssize_t float_set_size = NativeReal__float_size(td);
const size_t n_doubles = sizeof(double_values) / sizeof(double_values[0]);
const size_t n_floats = sizeof(float_values) / sizeof(float_values[0]);
double d;
(void)constraints;
if(max_length == 0) return result_skipped;
if(float_set_size == sizeof(double) && asn_random_between(0, 1) == 0) {
d = double_values[asn_random_between(0, n_doubles - 1)];
} else {
d = float_values[asn_random_between(0, n_floats - 1)];
}
if(NativeReal__set(td, sptr, d) < 0) {
return result_failed;
}
result_ok.length = float_set_size;
return result_ok;
}
/*
* Local helper functions.
*/
static size_t
NativeReal__float_size(const asn_TYPE_descriptor_t *td) {
const asn_NativeReal_specifics_t *specs =
(const asn_NativeReal_specifics_t *)td->specifics;
return specs ? specs->float_size : sizeof(double);
}
static double
NativeReal__get_double(const asn_TYPE_descriptor_t *td, const void *ptr) {
size_t float_size = NativeReal__float_size(td);
if(float_size == sizeof(float)) {
return *(const float *)ptr;
} else {
return *(const double *)ptr;
}
}
static ssize_t /* Returns -1 or float size. */
NativeReal__set(const asn_TYPE_descriptor_t *td, void **sptr, double d) {
size_t float_size = NativeReal__float_size(td);
void *native;
if(!(native = *sptr)) {
native = (*sptr = CALLOC(1, float_size));
if(!native) {
return -1;
}
}
if(float_size == sizeof(float)) {
if(asn_double2float(d, (float *)native)) {
return -1;
}
} else {
*(double *)native = d;
}
return float_size;
}
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