static int pack_long (grib_accessor* a, const long* val, size_t *len)
{
grib_accessor_signed_bits* self = (grib_accessor_signed_bits*)a;
int ret = 0;
long off = 0;
long numberOfBits=0;
size_t buflen = 0;
unsigned char *buf = NULL;
unsigned long i = 0;
unsigned long rlen = value_count(a);
if(*len != rlen) {
ret=grib_set_long(a->parent->h,self->numberOfElements,rlen);
}
ret=grib_get_long(a->parent->h,self->numberOfBits,&numberOfBits);
if (ret) return ret;
buflen = compute_byte_count(a);
buf = grib_context_malloc_clear(a->parent->h->context,buflen+sizeof(long));
for(i=0; i < rlen;i++)
grib_encode_signed_longb(buf, val[i] , &off, numberOfBits);
grib_buffer_replace(a, buf, buflen,1,1);
grib_context_free(a->parent->h->context,buf);
return ret;
}
static int pack_double(grib_accessor* a, const double* val, size_t *len)
{
grib_accessor_data_2order_packing* self = (grib_accessor_data_2order_packing*)a;
grib_handle* gh = grib_handle_of_accessor(a);
size_t i = 0;
size_t j = 0;
size_t n_vals = *len;
size_t buff_len = 0;
double divisor = 1;
long vcount = 0;
int err = 0;
long bias = 0;
double reference_value;
long binary_scale_factor;
long bits_per_value;
/*long bit_per_val_rectified_for_gribex;*/
long decimal_scale_factor;
long n1 = 0;
long n2 = 0;
long p1 = 0;
long n_unused_bits = 0;
long used_bits = 0;
long offsetsection = 0;
long snd_bitmap = 0;
long snd_ordr_wdiff = 0;
long matrix_values = 0;
long general_ext = 0;
long boustrophedonic = 0;
long two_ordr_spd = 0;
long plus1_spd = 0;
long octet_start_group = 0;
long width_spd_sp_desc = 0;
unsigned char* buf = NULL;
unsigned char* buf_size_of_groups = NULL;
unsigned char* buf_width_of_group = NULL;
unsigned char* buf_refs = NULL;
unsigned char* buf_vals = NULL;
double d = 0;
unsigned long* sec_val = NULL;
unsigned long* group_val = NULL;
short n_sp_diff = 0;
unsigned char* bitmap=NULL;
grib_accessor* abitmap=NULL;
size_t bitmap_len=0;
#if KEEP_OLD == 1
#else
second_order_packed* sd = NULL;
#endif
long bitp = 0;
long pointer_of_group_size = 0;
long pointer_of_group_width = 0;
long refsp = 0;
long nap = 0;
long offsetdata = 0;
double max;
double min;
int extraValues=0;
size_t nv =0;
if (*len ==0) return GRIB_NO_VALUES;
if((err = grib_get_long_internal(gh,self->offsetsection,&offsetsection)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->offsetdata,&offsetdata)) != GRIB_SUCCESS)
return err;
if((err = grib_get_long_internal(gh,self->bits_per_value,&bits_per_value)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->decimal_scale_factor, &decimal_scale_factor)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->matrix_values, &matrix_values)) != GRIB_SUCCESS)return err;
if((err = grib_get_long_internal(gh,self->snd_bitmap, &snd_bitmap)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->snd_ordr_wdiff, &snd_ordr_wdiff)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->general_ext, &general_ext)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->boustrophedonic, &boustrophedonic)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->width_spd_sp_desc, &width_spd_sp_desc)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->nap, &nap)) != GRIB_SUCCESS) return err;
if ((abitmap=grib_find_accessor(gh,self->bitmap))!=NULL) {
bitmap_len=grib_byte_count(abitmap);
bitmap=(unsigned char*)grib_context_malloc_clear(a->context,sizeof(char)*bitmap_len);
err=grib_unpack_bytes(abitmap,bitmap,&bitmap_len);
if (err) {grib_context_free(a->context,bitmap); return err;}
}
two_ordr_spd = 1;
plus1_spd = 0;
if(bits_per_value == 0)
return GRIB_NOT_IMPLEMENTED;
n_sp_diff = two_ordr_spd*2+plus1_spd;
/* calculation of integer array */
sec_val = (unsigned long*)grib_context_malloc(a->context,(n_vals)*sizeof(long));
d = grib_power(decimal_scale_factor,10) ;
max = val[0];
min = max;
for(i=0;i< n_vals;i++)
{
if ( val[i] > max ) max = val[i];
else if ( val[i] < min ) min = val[i];
}
min *= d;
max *= d;
/*bit_per_val_rectified_for_gribex = bits_per_value+8-bits_per_value%8;*/
if (grib_get_nearest_smaller_value(gh,self->reference_value,min,&reference_value)
!=GRIB_SUCCESS) {
grib_context_log(a->context,GRIB_LOG_ERROR,
"unable to find nearest_smaller_value of %g for %s",min,self->reference_value);
return GRIB_INTERNAL_ERROR;
}
/* the scale factor in Grib 1 is adjusted in gribex, for "normalization purpose" ... ?*/
binary_scale_factor = grib_get_binary_scale_fact(max,reference_value,bits_per_value,&err);
divisor = grib_power(-binary_scale_factor,2);
for(i=0;i< n_vals;i++)
sec_val[i] = (unsigned long)((((val[i]*d)-reference_value)*divisor)+0.5);
/* reverse the rows*/
if(boustrophedonic)
reverse_rows(sec_val,n_vals,nap,bitmap,bitmap_len);
if(snd_ordr_wdiff)
if((err = spatial_difference(a->context,sec_val, n_vals, n_sp_diff, &bias))){
grib_context_free(a->context,sec_val);
return err;
}
/* for(i=0;i < 10;i++)
printf("packing value [%d] %g %ld %ld bias %ld <<\n", i, val[i],sec_val[i],binary_scale_factor,bias );
*/
nv = n_vals-n_sp_diff;
group_val = sec_val+n_sp_diff;
#if KEEP_OLD == 1
#else
sd = grib_get_second_order_groups(a->context, group_val, nv);
#endif
bitp = 0;
p1 = sd->size_of_group_array;
bitp = (width_spd_sp_desc*(n_sp_diff+1)) ;
octet_start_group = (bitp+7)/8;
bitp = (p1*sd->nbits_per_widths);
octet_start_group += (bitp+7)/8;
bitp = (octet_start_group*8) + (sd->nbits_per_group_size*p1);
n1 = (bitp+7)/8;
bitp = n1*8 + bits_per_value*p1;
n2 = (bitp+7)/8;
used_bits = n2*8;
buff_len = (n2+sd->packed_byte_count);
if((a->offset+buff_len)%2) buff_len++;
buf = NULL;
buf = (unsigned char*)grib_context_malloc_clear(a->context,buff_len);
buf_width_of_group = buf;
buf_size_of_groups = buf+octet_start_group;
buf_refs = buf+n1;
buf_vals = buf+n2;
pointer_of_group_size = 0;
pointer_of_group_width = 0;
refsp = 0;
bitp = 0;
for(i=0;i < n_sp_diff;i++)
grib_encode_unsigned_longb(buf_width_of_group,sec_val[i], &pointer_of_group_width, width_spd_sp_desc);
grib_encode_signed_longb(buf_width_of_group, bias, &pointer_of_group_width, width_spd_sp_desc);
if(pointer_of_group_width%8)
pointer_of_group_width = 8+(pointer_of_group_width-(pointer_of_group_width%8));
vcount = n_sp_diff;
for(i = 0;i<p1;i++){
grib_encode_unsigned_longb(buf_width_of_group,sd->array_of_group_width[i],&pointer_of_group_width,sd->nbits_per_widths);
grib_encode_unsigned_longb(buf_size_of_groups,sd->array_of_group_size[i], &pointer_of_group_size ,sd->nbits_per_group_size);
grib_encode_unsigned_longb(buf_refs, sd->array_of_group_refs[i], &refsp , bits_per_value);
used_bits += sd->array_of_group_size[i]*sd->array_of_group_width[i];
for(j=0; j < sd->array_of_group_size[i];j++){
grib_encode_unsigned_longb(buf_vals, sec_val[vcount+j]-sd->array_of_group_refs[i] ,&bitp , sd->array_of_group_width[i]);
/* if(vcount+j < 10)
printf(">>packing value [%ld] %g %ld %ld nb %ld <<\n", vcount+j, val[vcount+j],sec_val[vcount+j],binary_scale_factor,sd->array_of_group_refs[i] );*/
}
vcount+= sd->array_of_group_size[i];
}
n_unused_bits = (buff_len*8)-used_bits;
grib_buffer_replace(a, buf,buff_len,1,1);
if((buff_len + (offsetdata-offsetsection)) %2) {
buff_len ++;
grib_update_size(a,buff_len);
}
octet_start_group += 1+ a->offset-offsetsection;
if((err = grib_set_long_internal(gh,self->octet_start_group, octet_start_group)) != GRIB_SUCCESS) return err;
n1 += 1+a->offset-offsetsection;
if((err = grib_set_long_internal(gh,self->n1,n1)) != GRIB_SUCCESS) return err;
n2 += 1+a->offset-offsetsection;
if((err = grib_set_long_internal(gh,self->n2,n2)) != GRIB_SUCCESS) return err;
extraValues=0;
while (p1 > 65535) {
p1-=65536;
extraValues++;
}
if((err = grib_set_long_internal(gh,self->p1,p1)) != GRIB_SUCCESS) return err;
if((err = grib_set_long_internal(gh,self->extraValues,extraValues)) != GRIB_SUCCESS) return err;
if((err = grib_set_long_internal(gh,self->p2,n_vals - n_sp_diff)) != GRIB_SUCCESS) return err;
if((err = grib_set_double_internal(gh,self->reference_value, reference_value)) != GRIB_SUCCESS)return err;
{
/* Make sure we can decode it again */
double ref = 1e-100;
grib_get_double_internal(gh,self->reference_value,&ref);
Assert(ref == reference_value);
}
if((err = grib_set_long_internal(gh,self->binary_scale_factor, binary_scale_factor)) != GRIB_SUCCESS) return err;
if((err = grib_set_long_internal(gh,self->decimal_scale_factor, decimal_scale_factor)) != GRIB_SUCCESS) return err;
if((err = grib_set_long_internal(gh,self->width_widths, sd->nbits_per_widths)) != GRIB_SUCCESS) return err;
if((err = grib_set_long_internal(gh,self->width_lengths, sd->nbits_per_group_size)) != GRIB_SUCCESS) return err;
err = grib_set_long_internal(gh,self->half_byte, n_unused_bits);
if(err != GRIB_SUCCESS) return err;
#if KEEP_OLD == 1
#else
grib_free_second_order_groups(a->context,sd);
#endif
;
grib_context_free(a->context,buf);
grib_context_free(a->context,sec_val);
if (bitmap!=NULL) grib_context_free(a->context,bitmap);
return GRIB_SUCCESS;
}
