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/*********************************************************************
* Copyright 2018, UCAR/Unidata
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*********************************************************************/
#include "d4includes.h"
#include <stdarg.h>
#include "d4includes.h"
#include "ezxml.h"
/*
The primary purpose of this code is to recursively traverse
the incoming data to get the endianness correct.
*/
/* Forward */
static int walkAtomicVar(NCD4meta*, NCD4node*, NCD4node*, void** offsetp);
static int walkOpaqueVar(NCD4meta*,NCD4node*, NCD4node*, void** offsetp);
static int walkStructArray(NCD4meta*,NCD4node*, NCD4node*, void** offsetp);
static int walkStruct(NCD4meta*, NCD4node*, NCD4node*, void** offsetp);
static int walkSeqArray(NCD4meta*, NCD4node*, NCD4node*, void** offsetp);
static int walkSeq(NCD4meta*,NCD4node*, NCD4node*, void** offsetp);
/**************************************************/
/*
Assumes that compiler->swap is true; does necessary
byte swapping.
*/
int
NCD4_swapdata(NCD4meta* compiler, NClist* topvars)
{
int ret = NC_NOERR;
int i;
void* offset;
offset = compiler->serial.dap;
for(i=0;i<nclistlength(topvars);i++) {
NCD4node* var = (NCD4node*)nclistget(topvars,i);
var->data.dap4data.memory = offset;
switch (var->subsort) {
default:
if((ret=walkAtomicVar(compiler,var,var,&offset))) goto done;
break;
case NC_OPAQUE:
/* The only thing we need to do is swap the counts */
if((ret=walkOpaqueVar(compiler,var,var,&offset))) goto done;
break;
case NC_STRUCT:
if((ret=walkStructArray(compiler,var,var,&offset))) goto done;
break;
case NC_SEQ:
if((ret=walkSeqArray(compiler,var,var,&offset))) goto done;
break;
}
var->data.dap4data.size = DELTA(offset,var->data.dap4data.memory);
/* skip checksum, if there is one */
if(compiler->serial.remotechecksumming)
offset = INCR(offset,CHECKSUMSIZE);
}
done:
return THROW(ret);
}
static int
walkAtomicVar(NCD4meta* compiler, NCD4node* topvar, NCD4node* var, void** offsetp)
{
int ret = NC_NOERR;
void* offset;
d4size_t i;
nc_type subsort;
d4size_t dimproduct;
NCD4node* basetype;
basetype = (var->sort == NCD4_TYPE ? var : var->basetype);
subsort = basetype->subsort;
dimproduct = (var->sort == NCD4_TYPE ? 1 : NCD4_dimproduct(var));
offset = *offsetp;
if(subsort == NC_ENUM)
subsort = var->basetype->basetype->subsort;
/* Only need to swap multi-byte integers and floats */
if(subsort != NC_STRING) {
int typesize = NCD4_typesize(subsort);
d4size_t totalsize = typesize*dimproduct;
if(typesize == 1) {
offset = INCR(offset,totalsize);
} else { /*(typesize > 1)*/
for(i=0;i<dimproduct;i++) {
char* sp = (char*)offset;
if(compiler->swap) {
switch (typesize) {
case 2: swapinline16(sp); break;
case 4: swapinline32(sp); break;
case 8: swapinline64(sp); break;
default: break;
}
}
offset = INCR(offset,typesize);
}
}
} else if(subsort == NC_STRING) { /* remaining case; just convert the counts */
COUNTERTYPE count;
for(i=0;i<dimproduct;i++) {
/* Get string count */
if(compiler->swap)
swapinline64(offset);
count = GETCOUNTER(offset);
SKIPCOUNTER(offset);
/* skip count bytes */
offset = INCR(offset,count);
}
}
*offsetp = offset;
return THROW(ret);
}
static int
walkOpaqueVar(NCD4meta* compiler, NCD4node* topvar, NCD4node* var, void** offsetp)
{
int ret = NC_NOERR;
void* offset;
d4size_t i;
unsigned long long count;
d4size_t dimproduct = NCD4_dimproduct(var);
dimproduct = (var->sort == NCD4_TYPE ? 1 : NCD4_dimproduct(var));
offset = *offsetp;
for(i=0;i<dimproduct;i++) {
/* Get and swap opaque count */
if(compiler->swap)
swapinline64(offset);
count = GETCOUNTER(offset);
SKIPCOUNTER(offset);
offset = INCR(offset,count);
}
*offsetp = offset;
return THROW(ret);
}
static int
walkStructArray(NCD4meta* compiler, NCD4node* topvar, NCD4node* var, void** offsetp)
{
int ret = NC_NOERR;
void* offset;
d4size_t i;
d4size_t dimproduct = NCD4_dimproduct(var);
NCD4node* basetype = var->basetype;
offset = *offsetp;
for(i=0;i<dimproduct;i++) {
/* Swap, possibly recursively, the single struct pointed to by offset*/
if((ret=walkStruct(compiler,topvar,basetype,&offset))) goto done;
}
*offsetp = offset;
done:
return THROW(ret);
}
static int
walkStruct(NCD4meta* compiler, NCD4node* topvar, NCD4node* structtype, void** offsetp)
{
int ret = NC_NOERR;
int i;
void* offset;
offset = *offsetp;
for(i=0;i<nclistlength(structtype->vars);i++) {
NCD4node* field = (NCD4node*)nclistget(structtype->vars,i);
NCD4node* fieldbase = field->basetype;
switch (fieldbase->subsort) {
default:
if((ret=walkAtomicVar(compiler,topvar,field,&offset))) goto done;
break;
case NC_OPAQUE:
/* The only thing we need to do is swap the counts */
if((ret=walkOpaqueVar(compiler,topvar,field,&offset))) goto done;
break;
case NC_STRUCT:
if((ret=walkStructArray(compiler,topvar,field,&offset))) goto done;
break;
case NC_SEQ:
if((ret=walkSeqArray(compiler,topvar,field,&offset))) goto done;
break;
}
}
*offsetp = offset;
done:
return THROW(ret);
}
static int
walkSeqArray(NCD4meta* compiler, NCD4node* topvar, NCD4node* var, void** offsetp)
{
int ret = NC_NOERR;
void* offset;
d4size_t i;
d4size_t dimproduct;
NCD4node* seqtype;
assert(var->sort == NCD4_VAR);
dimproduct = NCD4_dimproduct(var);
seqtype = var->basetype;
offset = *offsetp;
for(i=0;i<dimproduct;i++) {
/* Swap, possibly recursively, the single seq pointed to by offset*/
if((ret=walkSeq(compiler,topvar,seqtype,&offset))) goto done;
}
*offsetp = offset;
done:
return THROW(ret);
}
/*
Remember that the base type of var is a vlen.
*/
static int
walkSeq(NCD4meta* compiler, NCD4node* topvar, NCD4node* vlentype, void** offsetp)
{
int ret = NC_NOERR;
int i;
void* offset;
d4size_t recordcount;
NCD4node* basetype;
offset = *offsetp;
/* process the record count */
if(compiler->swap)
swapinline64(offset);
recordcount = GETCOUNTER(offset);
SKIPCOUNTER(offset);
basetype = vlentype->basetype; /* This may be of any type potentially */
assert(basetype->sort == NCD4_TYPE);
for(i=0;i<recordcount;i++) {
switch(basetype->subsort) {
default: /* atomic basetype */
if((ret=walkAtomicVar(compiler,topvar,basetype,&offset))) goto done;
break;
case NC_OPAQUE:
if((ret=walkOpaqueVar(compiler,topvar,basetype,&offset))) goto done;
break;
case NC_STRUCT:
/* We can treat each record like a structure instance */
if((ret=walkStruct(compiler,topvar,basetype,&offset))) goto done;
break;
case NC_SEQ:
if((ret=walkSeq(compiler,topvar,basetype,&offset))) goto done;
break;
}
}
*offsetp = offset;
done:
return THROW(ret);
}
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