static int unpack_long (grib_accessor* a, long* val, size_t *len)
{
grib_accessor_signed_bits* self = (grib_accessor_signed_bits*)a;
int i;
int ret=0;
long pos = a->offset*8;
long rlen = value_count(a);
long numberOfBits = 0;
if(*len < rlen)
{
grib_context_log(a->parent->h->context, GRIB_LOG_ERROR,
" wrong size (%ld) for %s it contains %d values ",*len, a->name , rlen);
*len = 0;
return GRIB_ARRAY_TOO_SMALL;
}
ret=grib_get_long(a->parent->h,self->numberOfBits,&numberOfBits);
if (ret) return ret;
if (numberOfBits==0) {
int i;
for (i=0;i<rlen;i++) val[i]=0;
return GRIB_SUCCESS;
}
for (i=0;i<rlen;i++)
val[i] = grib_decode_signed_longb(a->parent->h->buffer->data, &pos, numberOfBits);
*len = rlen;
return GRIB_SUCCESS;
}
static int unpack_double(grib_accessor* a, double* val, size_t *len)
{
grib_accessor_data_2order_packing* self = (grib_accessor_data_2order_packing*)a;
size_t i = 0;
size_t j = 0;
size_t n_vals = 0;
int err=0;
long vcount = 0, bias = 0;
double reference_value;
long binary_scale_factor;
long bits_per_value, decimal_scale_factor;
long n1 = 0, n2 = 0, extraValues = 0, p1 = 0, p2 = 0;
long offsetsection = 0, snd_bitmap = 0, 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 nbits_per_width =0;
long nbits_per_group_size =0;
long octet_start_group =0;
long width_spd_sp_desc =0;
grib_handle* gh = grib_handle_of_accessor(a);
unsigned char* buf_size_of_groups = (unsigned char*)gh->buffer->data;
unsigned char* buf_width_of_group = (unsigned char*)gh->buffer->data;
unsigned char* bufrefs = (unsigned char*)gh->buffer->data;
unsigned char* bufvals = (unsigned char*)gh->buffer->data;
double s = 0;
double d = 0;
double max = 0;
double min = 0;
unsigned long* sec_val = NULL;
long ref_vals = 0;
short n_sp_diff = 0;
short f_size_of_group = 0;
short f_width_of_group = 0;
long bitp = 0;
long pointer_of_group_size = 0;
long pointer_of_group_width = 0;
long refsp = 0;
long nap = 0;
long nn=0;
unsigned char* bitmap=NULL;
grib_accessor* abitmap=NULL;
size_t bitmap_len=0;
err=grib_value_count(a,&nn);
n_vals=nn;
if((err = grib_get_long_internal(gh,self->offsetsection,&offsetsection))
!= 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_double_internal(gh,self->reference_value, &reference_value))
!= GRIB_SUCCESS)return err;
if((err = grib_get_long_internal(gh,self->binary_scale_factor, &binary_scale_factor))
!= 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->n1,&n1)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->n2, &n2)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->p1, &p1)) != GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->extraValues, &extraValues)) != GRIB_SUCCESS) return err;
p1=p1+65536*extraValues;
if((err = grib_get_long_internal(gh,self->p2, &p2)) != 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->two_ordr_spd, &two_ordr_spd))
!= GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->plus1_spd, &plus1_spd))
!= GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->width_widths, &nbits_per_width))
!= GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->width_lengths, &nbits_per_group_size))
!= GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->octet_start_group, &octet_start_group))
!= GRIB_SUCCESS) return err;
if((err = grib_get_long_internal(gh,self->width_spd_sp_desc, &width_spd_sp_desc))
!= GRIB_SUCCESS) width_spd_sp_desc=-1;
if((err = grib_get_long_internal(gh,self->nap, &nap)) != GRIB_SUCCESS) return err;
self->dirty=0;
n_sp_diff = two_ordr_spd*2+plus1_spd;
Assert(bits_per_value < (sizeof(unsigned long)*8)-1);
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;}
}
if(bits_per_value == 0)
return GRIB_NOT_IMPLEMENTED;
/* I have everything now start decoding */
/*
fprintf(stdout,"\n****************************************\n");
fprintf(stdout," bits_per_value = %ld\n", bits_per_value);
fprintf(stdout," reference_value = %g\n", reference_value);
fprintf(stdout," binary_scale_factor = %ld\n", binary_scale_factor);
fprintf(stdout," decimal_scale_factor = %ld\n", decimal_scale_factor);
fprintf(stdout," n1 = %ld\n", n1);
fprintf(stdout," n2 = %ld\n", n2);
fprintf(stdout," p1 = %ld\n", p1);
fprintf(stdout," p2 = %ld\n", p2);
fprintf(stdout," matrix_values = %ld\n", matrix_values);
fprintf(stdout," snd_bitmap = %ld\n", snd_bitmap);
fprintf(stdout," snd_ordr_wdiff = %ld\n", snd_ordr_wdiff);
fprintf(stdout," general_ext = %ld\n", general_ext);
fprintf(stdout," boustrophedonic = %ld\n", boustrophedonic);
fprintf(stdout," two_ordr_spd = %ld \n", two_ordr_spd);
fprintf(stdout," plus1_spd = %ld\n", plus1_spd);
fprintf(stdout," n_sp_diff = %d\n", n_sp_diff);
fprintf(stdout," width_widths = %ld\n", nbits_per_group_size);
fprintf(stdout," width_lengths = %ld\n", nbits_per_width);
fprintf(stdout," octet_start_group = %ld\n", octet_start_group);
fprintf(stdout," width_spd_sp_desc = %ld\n", width_spd_sp_desc);
fprintf(stdout," offsetsection = %ld\n", offsetsection);
fprintf(stdout," offset w = %ld\n", octet_start_group + offsetsection);
fprintf(stdout,"\n****************************************\n");
*/
if(snd_bitmap || matrix_values)
return GRIB_NOT_IMPLEMENTED;
sec_val = (unsigned long*)grib_context_malloc(a->context,(n_vals)*sizeof(unsigned long));
buf_width_of_group += a->offset;
buf_size_of_groups += offsetsection+(octet_start_group-1); /* -1 because of documented starting at 1(and not 0)*/
bufrefs += offsetsection+n1-1; /* -1 because of documented starting at 1(and not 0)*/
pointer_of_group_size = 0;
pointer_of_group_width = 0;
refsp = 0;
for(i=0;i < n_sp_diff;i++)
sec_val[i] = grib_decode_unsigned_long(buf_width_of_group, &pointer_of_group_width, width_spd_sp_desc);
bias = grib_decode_signed_longb(buf_width_of_group, &pointer_of_group_width, width_spd_sp_desc);
bufvals += offsetsection+n2-1;
bitp = 0;
vcount = n_sp_diff;
if(pointer_of_group_width%8)
pointer_of_group_width = 8+(pointer_of_group_width-(pointer_of_group_width%8));
#if KEEP_OLD == 1
if(sd == NULL){
sd = grib_context_malloc_clear(a->context,sizeof(second_order_packed));
sd->packed_byte_count = 0;
sd->nbits_per_group_size = nbits_per_group_size;
sd->nbits_per_widths = nbits_per_width;
sd->size_of_group_array = p1;
sd->array_of_group_size = grib_context_malloc_clear(a->context,sizeof(unsigned long)*sd->size_of_group_array);
sd->array_of_group_width = grib_context_malloc_clear(a->context,sizeof(unsigned long)*sd->size_of_group_array);
sd->array_of_group_refs = grib_context_malloc_clear(a->context,sizeof( long)*sd->size_of_group_array);
}
#endif
for(i=0;i < p1;i++){
f_width_of_group = (short) grib_decode_unsigned_long(buf_width_of_group, &pointer_of_group_width, nbits_per_width);
f_size_of_group = (short) grib_decode_unsigned_long(buf_size_of_groups, &pointer_of_group_size, nbits_per_group_size);
ref_vals = grib_decode_unsigned_long(bufrefs, &refsp, bits_per_value);
#if KEEP_OLD == 1
if(sd->packed_byte_count == 0){
sd->array_of_group_width[i] = f_width_of_group;
sd->array_of_group_size[i] = f_size_of_group;
sd->array_of_group_refs[i] = ref_vals;
}
#endif
for(j=0; j < f_size_of_group;j++){
sec_val[vcount+j] = ref_vals + grib_decode_unsigned_long(bufvals, &bitp, f_width_of_group);
}
vcount += f_size_of_group;
}
#if KEEP_OLD == 1
if(sd->packed_byte_count == 0) sd->packed_byte_count = (bitp+7)/8;
#endif
Assert (n_vals == vcount);
/*for(i=0;i < 10;i++)
printf("readvalue [%d] %ld %ld bias %ld <<\n", i,sec_val[i],binary_scale_factor,bias );*/
if(snd_ordr_wdiff)
de_spatial_difference(a->context,sec_val, n_vals, n_sp_diff, bias);
if(boustrophedonic)
reverse_rows(sec_val,n_vals,nap,bitmap,bitmap_len);
s = grib_power(binary_scale_factor,2);
d = grib_power(-decimal_scale_factor,10) ;
for(i=0;i < n_vals;i++)
val[i] = (double) ((((double)sec_val[i])*s)+reference_value)*d;
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;
grib_context_free(a->context,sec_val);
if (bitmap!=NULL) grib_context_free(a->context,bitmap);
return err;
}
