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|
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "IEEEIO.hh"
#ifdef WIN32
// Are we Microsoft VC++ 5.0 or 6.0?
#if defined(_MSC_VER) && ( (_MSC_VER == 1100) || (_MSC_VER == 1200) || (_MSC_VER == 1300)) // yes we are
#include <fcntl.h>
#ifdef O_RDONLY
#undef O_RDONLY
#endif
#define O_RDONLY _O_RDONLY|_O_BINARY
#ifdef O_RDWR
#undef O_RDWR
#endif
#define O_RDWR _O_RDWR|_O_BINARY
#ifdef O_WRONLY
#undef O_WRONLY
#endif
#define O_WRONLY _O_WRONLY|_O_BINARY
#ifdef O_CREAT
#undef O_CREAT
#endif
#define O_CREAT _O_CREAT|_O_BINARY
#ifdef O_TRUNC
#undef O_TRUNC
#endif
#define O_TRUNC _O_TRUNC|_O_BINARY
#ifdef O_APPEND
#undef O_APPEND
#endif
#define O_APPEND _O_APPEND|_O_BINARY
#else // not an MSC compiler (use the old defines)
#define O_RDONLY _O_RDONLY
#define O_RDWR _O_RDWR
#define O_WRONLY _O_WRONLY
#define O_CREAT _O_CREAT
#define O_TRUNC _O_TRUNC
#define O_APPEND _O_APPEND
#endif // not an MSC compiler
#endif // WIN32
#ifdef FFIO
#include <ffio.h>
static struct ffsw ffopens_status;
//#define open(x,y,z) ffopens(x,y,z, 0, 0, &ffopens_status, "bufa.bufsize=256.num_buffers=4")
#define LAYERS ""
#ifdef T3E
#define open(x,y,z) ffopens(x,y,S_IWRITE|S_IREAD,0,100,&ffopens_status,LAYERS);
#else // its probably an SGI
#define open(x,y,z) ffopens(x,y,S_IWRITE|S_IREAD,0,0,&ffopens_status,LAYERS);
#endif
#define close(x) ffclose(x)
#endif
#ifdef T3E
int IEEEIO::ffioIsTrue(){
#ifdef FFIO
return 1;
#else
return 0;
#endif
}
#endif
// int IEEEIO::nextRecord() (stores state in current_record)
// also garauntees integrity of datasetnumber and
// the current_rec and current_dat
IEEEIO::AttribRef::AttribRef(IEEEIO::AttribRef &src){
//puts("AttribRef::copy constructor");
rec=src.rec;
offset=src.offset;
strcpy(name,src.name);
}
IEEEIO::AttribRef::AttribRef(){
//puts("empty attribref constructor");
}
/*
IEEEIO::AttribRef::~AttribRef(){
//puts("delete an attrib ref");
}
IEEEIO::RecRef::~RecRef(){
//puts("delete a recref");
}
*/
IEEEIO::AttribRef &IEEEIO::AttribRef::operator=(IEEEIO::AttribRef &src){
if(this != &src) {
//puts("\tAttribRef::copy operator");
rec=src.rec;
offset=src.offset;
//name=src.name; // uses the flexarray copy constructor
strcpy(name,src.name);
}
return *this;
}
IEEEIO::DataRef::DataRef():end_offset(0){
//puts("Empty DataRef Constructor!!");
}
IEEEIO::DataRef::DataRef(IEEEIO::DataRef &src){
//puts("DataRef:: copy constructor");
rec=src.rec;
offset=src.offset;
end_offset=src.end_offset;
annotations = src.annotations;
attributes = src.attributes;
//puts("DataRef:: copy constructor DONE");
}
/*
IEEEIO::DataRef::~DataRef(){
// puts("dataref destructor");
}*/
IEEEIO::DataRef &IEEEIO::DataRef::operator=(IEEEIO::DataRef &src){
if(this != &src){
rec=src.rec;
offset=src.offset;
end_offset=src.end_offset;
annotations = src.annotations;
attributes = src.attributes;
}
return *this;
}
void IEEEIO::initPosition(){
// init
#ifdef FFIO
actual_position = ::ffseek(fid,0,L_INCR);
#else
actual_position = ::lseek(fid,0,L_INCR);
#endif
virtual_position = actual_position + writebuffercount;
// get actual filesize
#ifdef FFIO
file_length = ::ffseek(fid,0,L_XTND);
::ffseek(fid,actual_position,L_SET); // seek back to original pos
#else
#ifdef SGI
file_length = ::lseek64(fid,0,L_XTND);
::lseek64(fid,actual_position,L_SET); // seek back to original pos
#else
file_length = ::lseek(fid,0,L_XTND);
::lseek(fid,actual_position,L_SET); // seek back to original pos
#endif
#endif
if(virtual_position > file_length)
file_length = virtual_position;
// printf("Init position: a=%ld v=%ld f=%ld\n",
// actual_position,virtual_position,file_length);
}
//long IEEEIO::getPosition(int immediate) {
//#ifdef FFIO
// if(!writebuffer || immediate)
// return ::ffseek(fid,0,L_INCR);
// else
// return ::ffseek(fid,0,L_INCR)+writebuffercount;
//#else
// if(!writebuffer || immediate)
// return ::lseek(fid,0,L_INCR);
// else
// return ::lseek(fid,0,L_INCR)+writebuffercount;
//#endif
//}
void IEEEIO::restart(){
// this->initPosition();
//puts("restart seek");
IEEEIO::lseek(FileHdrSize,L_SET); // T3E Kludge
//puts("restart");
current_rec_offset=current_dat_offset=FileHdrSize; // T3E Kludge
current_rec.recordsize=0;
current_dat.datasize=0;
current_dat.rank=0;
datasetnumber=0; // initial
hasread=0; // and it hasn't been read yet...
}
int IEEEIO::nextRecord(){
RecordHdr rec;
// should have it check the datasetnumber before seeking
// this will require consistancy checks for the datasetnumber
// elsewhere in the code
Long8 src=current_rec_offset;
Long8 dst=src+current_rec.recordsize;
current_rec_offset=IEEEIO::lseek(dst,L_SET); // seek from start
// or use rec.read(rec,fid)
// or IEEEIO::RecordHdr::read(rec,fid)
if(RecordHdr::read(this,rec) <= 0)
return 0;
current_rec_offset=dst+RecordHdrSize;
current_rec=rec;
return 1;
}
int IEEEIO::nextDataRecord(){
hasread=0; // reset the hasread field
if(current_rec.recordtype==DataRecord &&
datasetnumber!=current_rec.sequenceID){
IEEEIO::lseek(current_rec_offset,L_SET); // seek to record start
}
else {
do { // scan through records for the next DataRecord
if(!nextRecord())
return 0; // reached end of file
} while(current_rec.recordtype!=DataRecord);
}
// dat_offset is same as current_rec_offset for the data record
// so nextRecord() can be used for scanning for annotations
current_dat_offset=current_rec_offset;
DataRecordHdr::read(this,current_dat);
datasetnumber=current_rec.sequenceID;
return 1;
}
//long IEEEIO::getLength(int immediate){
//#ifdef FFIO
// long currentpos=::ffseek(fid,0,L_INCR); // find currentposition
// long auspos = ::ffseek(fid,0,L_XTND); // seek to end to find length
//#else
// long currentpos=::lseek(fid,0,L_INCR); // find currentposition
// long auspos = ::lseek(fid,0,L_XTND); // seek to end to find length
//#endif
// if(writebuffer && writebuffercount && !immediate){
// // must compute real end of file
// register long pos1=currentpos+writebuffercount;
// if(pos1>auspos) auspos=pos1;
// }
//#ifdef FFIO
// ::ffseek(fid,currentpos,L_SET); // seek back to original position
//#else
// ::lseek(fid,currentpos,L_SET); // seek back to original position
//#endif
// return auspos; // return end position
//}
void IEEEIO::byteswapBuffer(void *buf,Long8 nelements,int elementsize){
char *buffer=(char *)buf; // treat as a character buffer
if(elementsize<=1) return;
for(Long8 i=0;i<nelements;i++,buffer+=elementsize){
register int s,d;
register char c;
// do the swap thang on each element
for(s=0,d=elementsize-1;s<d;s++,d--){
c=buffer[s];
buffer[s]=buffer[d];
buffer[d]=c;
}
}
}
void IEEEIO::byteswapBuffer(void *source,void *dest,Long8 nelements,int elementsize){
if(elementsize<=1) return;
// Lets optimize for integers
switch(elementsize){
case 4:
{
Int *src=(Int*)source;
Int *dst=(Int*)dest;
for(Long8 i=0;i<nelements;i++){
union IntChar {
int i;
char a[4];
};
register IntChar ts,td;
// do the swap thang on each element
td.i=ts.i=src[i];
td.a[0]=ts.a[3];
td.a[1]=ts.a[2];
td.a[2]=ts.a[1];
td.a[3]=ts.a[0];
dst[i]=td.i;
}
}
break;
//#ifndef WIN32 // Win32 can't have 8byte integers
case 8:
{
Long8 *src=(Long8*)source;
Long8 *dst=(Long8*)dest;
for(long i=0;i<nelements;i++){
union LongChar {
Long8 l;
char a[8];
};
register LongChar ts,td;
// do the swap thang on each element
td.l=ts.l=src[i];
td.a[0]=ts.a[7];
td.a[1]=ts.a[6];
td.a[2]=ts.a[5];
td.a[3]=ts.a[4];
td.a[4]=ts.a[3];
td.a[5]=ts.a[2];
td.a[6]=ts.a[1];
td.a[7]=ts.a[0];
dst[i]=td.l;
}
}
break;
//#endif
default:
{
char *src=(char *)source; // treat as a character buffer
char *dst=(char *)dest;
for(Long8 i=0;i<nelements;i++,src+=elementsize,dst+=elementsize){
register int s,d;
// do the swap thang on each element
for(s=0,d=elementsize-1;s<d;s++,d--){
dst[d]=src[s];
dst[s]=src[d];
}
}
}
break;
}
}
int IEEEIO::writeFileHeader(){
// Long8 pos=getPosition(); // use virtual_position
// this->flush();
//puts("WriteHeader");
for(int c=0;c<4;c++) // make sure magic is correct
file_header.magic.c[c]=c+1;
if(swapbytes)
file_header.byteorder.i=IEEE_REVERSE_MAGIC;
else
file_header.byteorder.i=IEEE_NATIVE_MAGIC;
file_header.majorversion = IEEE_MAJORVERSION;
file_header.minorversion = IEEE_MINORVERSION;
IEEEIO::lseek(0,L_SET); // will force a flush (if needed)
//puts("done writeheader seek");
if(swapbytes) file_header.byteswap();
// T3E Kludge
int sz=FileHdr::write(this,file_header);
if(swapbytes) file_header.byteswap();
// if(pos>=FileHdrSize) // T3E Kludge
// IEEEIO::lseek(pos,L_SET);
return sz;
}
// reads the start of the file (including the magic number)
// and determines if this is
// 1) A valid IEEEIO file
// 2) what the byte order is
// 3) How many datasets are contained
int IEEEIO::readFileHeader(){
Long8 pos=getPosition(); // use virtual_position
IEEEIO::lseek(0,L_SET);
// T3E Kludge
// int sz=FileHdr::read(this,file_header);
FileHdr::read(this,file_header);
IEEEIO::lseek(pos,L_SET); // return to original position
for(int c=0;c<4;c++){
if((c+1)!=file_header.magic.c[c]){
file_header.ndatasets=0;
// fprintf(stderr,"IEEEIO: File %s has the wrong magic number\n",filename);
return -1; // bad magic
}
}
// now compare byte order
if(file_header.byteorder.i==IEEE_NATIVE_MAGIC)
swapbytes=0;
else{
swapbytes=1;
//puts("byteswapping is On !!!!!!!!!!!!!!!");
}
if(swapbytes) file_header.byteswap();
ndatasets=file_header.ndatasets;
return 1;
}
void IEEEIO::rebuildFileHeader(){
int lndatasets;
Long8 pos=getPosition(); // save file position (use virtual position
restart();
// steal seek loop from the nextDataRecord()
for(lndatasets=0;
nextDataRecord()>0;
lndatasets++){
// now check the length of the record
// for each record.
}
file_header.ndatasets=lndatasets;
writeFileHeader();
IEEEIO::lseek(pos,L_SET);
}
void IEEEIO::appendRecordTable(){
//printf("appending records==================\n");
while(nextRecord()>0){
//printf("appending record\n");
switch(current_rec.recordtype){
case DataRecord:
//fprintf(stderr,"DataRecord");
(rec_table[current_rec.sequenceID]).rec=current_rec;
// use virtual_position
(rec_table[current_rec.sequenceID]).offset=getPosition()-RecordHdrSize;
break;
case AnnotationRecord:{
//fprintf(stderr,"\tAnnotationRecord\n");
RecRef ref;
ref.rec=current_rec;
ref.offset=getPosition()- RecordHdrSize; // T3E Kludge
(rec_table[current_rec.sequenceID]).annotations.append(ref);
}
break;
case AttributeRecord:{
//fprintf(stderr,"\tAttributeRecord\n");
AttribRef ref,*refp;
AttributeRecordHdr attribhdr;
ref.rec=current_rec;
ref.offset=getPosition()- RecordHdrSize; // T3E Kludge
(rec_table[current_rec.sequenceID]).attributes.append(ref);
int idx=(rec_table[current_rec.sequenceID]).attributes.getSize()-1;
refp = &((rec_table[current_rec.sequenceID]).attributes[idx]);
AttributeRecordHdr::read(this,attribhdr);
IEEEIO::read(refp->name,attribhdr.namesize);
}
break;
default:
fprintf(stderr,"\tIEEEIO::Error UNKNOWN RECORD TYPE [%d]... recovering.",
(int)(current_rec.recordtype));
return;
}
(rec_table[current_rec.sequenceID]).end_offset =
current_rec_offset + current_rec.recordsize;
}
}
void IEEEIO::buildRecordTable(){
if(file_header.ndatasets<0)
return; // failure
restart();
rec_table.setSize(file_header.ndatasets);
appendRecordTable();
}
void IEEEIO::openFile(CONST char *fname,IObase::AccessMode amode,int swbytes){
swbytes = swbytes;
switch(amode){
case IObase::Read:
fid=open(fname,O_RDONLY,0644);
if(fid<0){
fprintf(stderr,"IEEEIO: Failed to open %s for reading\n",fname);
return;
}
initPosition();
if(readFileHeader()<=0){
close(fid);
// fprintf(stderr,"IEEEIO: File %s is empty (opened for reading)\n",fname);
fid=-1; // invalid file
return;
}
if(file_header.ndatasets<0){
// must recover from crash
close(fid);
fid=open(fname,O_RDWR,0644);
rebuildFileHeader();
close(fid);
fid=open(fname,O_RDONLY,0644);
readFileHeader(); // reread..
}
buildRecordTable();
restart(); // go to start of file
ndatasets = file_header.ndatasets;
nextRecord(); // prime the recordnumber
break;
case IObase::Write: // truncates
fid=open(fname,O_WRONLY|O_CREAT|O_TRUNC,0644);
if(fid<0){
fprintf(stderr,"IEEEIO: Failed to create %s for writing\n",fname);
return;
}
initPosition();
file_header.ndatasets=-1;
ndatasets=0;
writeFileHeader();
restart();
break;
case IObase::Append:
default:
fid=open(fname,O_RDWR,0644); // PW: We *don't* want O_APPEND here.
// O_Append moves the file ptr to end
// of file before a write; this means
// when we do the writeHeader() below
// this is stuck at the end of this file
// which makes it puke.
if(fid<0){
fprintf(stderr,"IEEEIO: Failed to open %s for append\n",fname);
return;
}
initPosition();
if(readFileHeader()<=0){
close(fid);
fprintf(stderr,"IEEEIO: File %s is empty (opened for append)\n",fname);
fid=-1; // invalid file
return;
}
if(file_header.ndatasets<0){
// must recover from crash
close(fid);
fid=open(fname,O_RDWR,0644);
initPosition();
rebuildFileHeader();
close(fid);
fid=open(fname,O_RDWR,0644); // PW: We want to open RDWR again
initPosition();
readFileHeader(); // reread..
}
buildRecordTable();
restart(); // go to start of file
ndatasets = file_header.ndatasets;
// now we sync up in the way we would for a write
file_header.ndatasets=-1;
writeFileHeader(); // write header with -1 to indicate we are writing
// could refcount by increasing the - of numbers in header
// (needs extra flag for synced)
restart();
nextRecord(); // prime the recordnumber
//seek(ndatasets);
break;
}
}
IEEEIO::IEEEIO(IEEEIO *file): // read only dup
IObase(file->filename,IObase::Read),fid(dup(file->fid)),
datasetnumber(0),ndatasets(file->ndatasets),
swapbytes(file->swapbytes),hasread(0),
writebuffersize(0),writebuffercount(0),writebuffer(0),
savedposition(-1),virtual_position(-1),actual_position(-1),
file_length(-1)
{
if(file->masterfile) masterfile=file->masterfile;
else masterfile=file;
initPosition(); // initial positional pointers
ndatasets = file_header.ndatasets = file->ndatasets;
buildRecordTable();
restart(); // go to start of file
nextRecord(); // prime the recordnumber
}
IEEEIO::IEEEIO(CONST char *fname, ExtendedAccessMode amode,int swbytes):
IObase(fname,mode(amode)),fid(-1),datasetnumber(0),
ndatasets(0),swapbytes(swbytes),hasread(0),masterfile(0),
writebuffersize(0),writebuffercount(0),writebuffer(0),
savedposition(-1),virtual_position(-1),actual_position(-1),
file_length(-1)
{
if(amode==IEEEIO::SharedRead){
masterfile=this; // we are multi-reading
fid=open(fname,O_RDONLY,0644);
if(fid<0){
fprintf(stderr,"IEEEIO: Failed to open %s for reading\n",fname);
return;
}
this->initPosition();
if(readFileHeader()<=0){
close(fid);
fprintf(stderr,"IEEEIO: File %s is empty (opened for reading)\n",fname);
fid=-1; // invalid file
return;
}
buildRecordTable();
restart(); // go to start of file
ndatasets = file_header.ndatasets;
nextRecord(); // prime the recordnumber
}
else
openFile(fname,mode(amode),swbytes);
}
IEEEIO::IEEEIO(CONST char *fname,IObase::AccessMode amode,int swbytes):
IObase(fname,amode),fid(-1),datasetnumber(0),
ndatasets(0),swapbytes(swbytes),hasread(0),masterfile(0),
writebuffersize(0),writebuffercount(0),writebuffer(0),
savedposition(-1)
{
// Long8 fpos;
openFile(fname,amode,swbytes);
}
IEEEIO::~IEEEIO(){
if(fid<0 && savedposition>=0) resume();
// resume IO only if it is paused so that
// we can do the final writes to the file before
// closing
//puts("do bufferoff");
if(writebuffer) bufferOff(); // automatically flushes buffer
//puts("now rewrite header");
if(fid>=0){
if(accessmode!=IObase::Read){
file_header.ndatasets=ndatasets;
writeFileHeader();
}
close(fid);
}
fid=-1;
}
int IEEEIO::isValid(){
if(fid>=0) return 1;
else return 0;
}
int IEEEIO::write(IObase::DataType typeID,int rank,CONST int *dims,const void *data){
int i;
RecordHdr rec;
DataRecordHdr hdr;
// make sure its the EOF
if(accessmode==IObase::Read) return 0;
hasread=0; // reset hasread; (JMS: changed from local Thu Mar 12 13:53:13 CST 1998)
if(rec_table.getSize()>0){
Long8 endpos = rec_table[rec_table.getSize()-1].end_offset;
IEEEIO::lseek(endpos,L_SET); // don't know if this is costly
}
else
IEEEIO::lseek(0,L_XTND); // seek to end of file
// if 0-length seeks are costly, then alternative
// logic can be constructed to ensure writes to end of file
for(i=0,hdr.datasize=1;i<rank;i++)
hdr.datasize*=dims[i];
if(chunkdims.getSize()<rank)
chunkdims.setSize(rank);
for(i=0;i<rank;i++) chunkdims[i]=dims[i];
hdr.datasize*=sizeOf(typeID);
hdr.numbertype=typeID;
hdr.rank=rank;
// if last annotation slot is filled, it is a pointer
// to another block of 8 annotation pointers.
rec.recordtype = DataRecord;
rec.recordsize = hdr.datasize +
DataRecordHdrSize +
sizeof(Int) * rank;
rec.sequenceID = datasetnumber = ndatasets++;
// need to byteswap the header and records if swapbytes==True
current_dat=hdr; // first copy native info to current
current_rec=rec;
RecordHdr::write(this,rec);
current_dat_offset=current_rec_offset=getPosition();
DataRecordHdr::write(this,hdr);
// write the dims.... (byteswap if necessary)
union { void *data; const void *const_data;} cast_union;
cast_union.const_data = chunkdims.getData();
if(swapbytes) byteswapBuffer(cast_union.data,rank,sizeof(Int));
IEEEIO::write(cast_union.const_data,sizeof(Int)*rank);
if(swapbytes) byteswapBuffer(cast_union.data,rank,sizeof(Int)); // swap back
cast_union.const_data = data;
if(swapbytes) byteswapBuffer(cast_union.data,hdr.datasize/sizeOf(typeID),sizeOf(typeID));
int sz = IEEEIO::write(data,hdr.datasize);
// yeah! double bytswap seem stupid, but consider the alternatives
// write one byte at a time (swapping as we go) == systemcall overhead
// copy to a temporary buffer and swap bytes == malloc, copy, and free!
// strangely its faster to swap twice
if(swapbytes) byteswapBuffer(cast_union.data,hdr.datasize/sizeOf(typeID),sizeOf(typeID));
DataRef dref;
dref.rec=current_rec;
// Must find exact size!!!
dref.offset = current_rec_offset - RecordHdrSize;
dref.end_offset = current_rec_offset + current_rec.recordsize;
if(accessmode!=IObase::Write) // do not store if in write-only mode
rec_table.append(dref);
return sz;
}
//setCurrentRec(offset);
// storing in 8*1024 byte blocks (always aligned to chunk boundaries)
// will result in more efficient seeking behavior due to
// disk block size... thus file is always aligned to unix
// filesystem blocks. (for now, we'll use die method maximo-stupido...
int IEEEIO::readInfo(IObase::DataType &typeID,int &rank,int *dims,int maxdims){
if(accessmode!=IObase::Read && accessmode!=IObase::Append)
return 0;
//int sz;
if(hasread) datasetnumber++; // increment to the next one if this has been read
if(datasetnumber>=rec_table.getSize()) return 0; // end of file
// read the record + header
hasread=1; // we've read this, so next time we hit it, we'll increment again
IEEEIO::lseek(rec_table[datasetnumber].offset,L_SET);
// T3E Kludge
RecordHdr::read(this,current_rec);
DataRecordHdr::read(this,current_dat);
rank=current_dat.rank;
if(chunkdims.getSize()<rank) chunkdims.setSize(rank);
typeID=Int2DataType(current_dat.numbertype);
IEEEIO::read(chunkdims.getData(),sizeof(Int)*rank);
if(swapbytes) byteswapBuffer(chunkdims.getData(),(rank>maxdims)?maxdims:rank,sizeof(Int));
for(int i=0;i<maxdims && i<rank;i++) dims[i]=chunkdims[i];
streaming=0;
return 1;
}
/*
It does not appear that the bytswapping is really configured here...
*/
int IEEEIO::read(void *data){
if(accessmode!=IObase::Read && accessmode!=IObase::Append)
return 0; // can't readif write only
if(datasetnumber>=rec_table.getSize()) return 0; // seek past end.
Long8 datapos=rec_table[datasetnumber].offset+RecordHdrSize+DataRecordHdrSize+
sizeof(Int)*current_dat.rank;
// should make certain current file position is correct
// if(getPosition() != datapos) (redundant call to lseek())
IEEEIO::lseek(datapos,L_SET); // seek to position
int sz=IEEEIO::read(data,current_dat.datasize); // read nbytes
int typelen = sizeOf(Int2DataType(current_dat.numbertype));// compute elem sz
if(swapbytes) byteswapBuffer(data,current_dat.datasize/typelen,typelen);
return sz;
}
int IEEEIO::seek(int idx){
if(accessmode!=IObase::Read &&
accessmode!=IObase::Append) // can't seek unless readable
return -1; // failed to seek
if (idx >= ndatasets || idx < 0) {
return -1; // do a bounds check (probably should just clip)
}
// bound the index
if((1+idx)>rec_table.getSize()) idx=rec_table.getSize();
if(idx<0) idx=0;
index = idx;
IEEEIO::lseek(rec_table[index].offset,L_SET);
// T3E Kludge
RecordHdr::read(this,current_rec);
current_rec_offset=getPosition();
datasetnumber=current_rec.sequenceID; // Changed: had -1
hasread=0; // new file position
return current_rec.sequenceID;
}
int IEEEIO::nDatasets() {
// can work across threads or across processes since
// it gathers information directly from the file.
// it does not need to share info with masterfile
// in fact you can delete the masterfile
if(masterfile){ // we are passive read-only. update nDatasets
// seek-scan to find datasets?
int oldlength = (rec_table.getSize())?(rec_table[rec_table.getSize()-1].end_offset):0;
//printf("oldlength=%u newlength=%u\n",oldlength,(unsigned int)(getLength()));
if(getLength()>oldlength){
// lets scan to find the end
int lndatasets;
puts("We should clearly not be here!!!");
restart(); // go to beginning
// steal seek loop from the nextDataRecord()
for(lndatasets=0;
nextDataRecord()>0;
lndatasets++){
//printf("scan dataset[%u]\n",lndatasets);
}
file_header.ndatasets = lndatasets;
rec_table.setSize(lndatasets);
// printf("counted %u datasets. old was %u datasets\n",lndatasets,ndatasets);
seek(ndatasets); // seek to current last
ndatasets = lndatasets; // then reset the last
appendRecordTable(); // append new stuff to record table
}
}
return ndatasets;
}
int IEEEIO::writeAnnotation(CONST char *annotation){
int stringlen;
RecRef aref;
RecordHdr rec;
if(accessmode==IObase::Read || !annotation) return 0;
stringlen=strlen(annotation)+1;
if(rec_table.getSize()>0){
Long8 endpos = rec_table[rec_table.getSize()-1].end_offset;
IEEEIO::lseek(endpos,L_SET); // don't know if this is costly
}
else
IEEEIO::lseek(0,L_XTND); // seek to end of file
rec.recordtype=AnnotationRecord;
rec.recordsize=stringlen;
if(datasetnumber>=0) rec.sequenceID=datasetnumber;
else rec.sequenceID=current_rec.sequenceID; // a kludge for error immunity
current_rec = rec;
// T3E Kludge
current_rec_offset = getPosition() + RecordHdrSize;
// T3E Kludge
RecordHdr::write(this,rec);
// if(swapbytes) byteswap(rec);
int sz=IEEEIO::write(annotation,stringlen);
aref.rec=current_rec;
// T3E Kludge
aref.offset=current_rec_offset-RecordHdrSize;
if(accessmode!=IObase::Write){ // don't write to index cache if in write-only mode
rec_table[datasetnumber].annotations.append(aref);
rec_table[datasetnumber].end_offset=getPosition();
}
return sz;
}
/*
If objects could have all attributes implicitly availible for querying
when passed to subroutines. Basic object methods for data movement like
linearize() or object.linearized[index] object.linearized.size.
Then for objects that a receiver can't deal with either
1: have compiletime "gatekeepers" that restrict allowable types
that it can receive
2: Do a treesearch through object space to find a convertor sequence
that can convert the current type into the one that the object
accepts. If no such object can be found, indicate runtime
object adaptor failure.
*/
int IEEEIO::readAnnotationInfo(int number,int &length){
if(datasetnumber<0 ||
number>=rec_table[datasetnumber].annotations.getSize()){
length=0;
return -1;
}
length=rec_table[datasetnumber].annotations[number].rec.recordsize;
return length;
}
int IEEEIO::readAnnotation(int number,char *annotation,int maxsize){
// returns actual size of annotation or -1 if error
if(datasetnumber<0 || accessmode==IObase::Write ||
number>=rec_table[datasetnumber].annotations.getSize()){
return -1;
}
IEEEIO::lseek(rec_table[datasetnumber].annotations[number].offset,L_SET);
// T3E Kludge
RecordHdr::read(this,current_rec);
IEEEIO::read(annotation,(maxsize<rec_table[datasetnumber].annotations[number].rec.recordsize)?
maxsize:(rec_table[datasetnumber].annotations[number].rec.recordsize));
annotation[maxsize-1]='\0';
return rec_table[datasetnumber].annotations[number].rec.recordsize;
}
int IEEEIO::nAnnotations(){
if(datasetnumber<0 || accessmode==IObase::Write)
return -1;
return rec_table[datasetnumber].annotations.getSize();
}
// for attributes
int IEEEIO::writeAttribute(CONST char *aname,IObase::DataType typeID,Long length,const void *data){
int stringlen;
AttribRef aref;
RecordHdr rec;
AttributeRecordHdr attrib;
if(datasetnumber<0){
fprintf(stderr,"IEEEIO::writeAttribute(): Error, cannot write attribute before any datasets have been written!\n");
return 0;
}
if(accessmode==IObase::Read) return 0;
stringlen=strlen(aname)+1;
if(rec_table.getSize()>0){
Long8 endpos = rec_table[rec_table.getSize()-1].end_offset;
IEEEIO::lseek(endpos,L_SET); // don't know if this is costly
}
else
IEEEIO::lseek(0,L_XTND); // seek to end of file
attrib.datasize=length*sizeOf(typeID);
attrib.namesize=stringlen;
attrib.numbertype=typeID;
rec.recordtype=AttributeRecord;
rec.recordsize=attrib.datasize+attrib.namesize+AttributeRecordHdrSize;
if(datasetnumber>=0) rec.sequenceID=datasetnumber;
else rec.sequenceID=current_rec.sequenceID; // a kludge for error immunity
current_rec=rec;
current_rec_offset=getPosition() + RecordHdrSize;
aref.rec=current_rec;
aref.offset=current_rec_offset-RecordHdrSize;
// no copy constructor for aref, so must do manually
if(accessmode != IObase::Write){
int lastindex;
rec_table[datasetnumber].attributes.append(aref);
lastindex=rec_table[datasetnumber].attributes.getSize()-1;
strcpy(rec_table[datasetnumber].attributes[lastindex].name,aname);
}
// T3E Kludge
RecordHdr::write(this,rec);
AttributeRecordHdr::write(this,attrib);
//printf("\tnow write the string\n");
IEEEIO::write(aname,stringlen);
//printf("\tdone IEEEIO::stringlen=%u typeid=%u\n",attrib.namesize,attrib.numbertype);
// data is not byte-reversed...
int sz=0;
union { void *data; const void *const_data;} cast_union;
cast_union.const_data = data;
if(swapbytes) byteswapBuffer(cast_union.data,length,sizeOf(typeID));
IEEEIO::write(cast_union.const_data,length*sizeOf(typeID));
if(swapbytes) byteswapBuffer(cast_union.data,length,sizeOf(typeID)); // swap back
if(accessmode != IObase::Write)
rec_table[datasetnumber].end_offset=getPosition();
// doesn't appear to store attributes properly
return sz;
}
int IEEEIO::readAttributeInfo(int number,char *aname,IObase::DataType &typeID,
Long &nelem,int maxnamelen){
if(accessmode==IObase::Write) return -1;
FlexArray<AttribRef> *attribs= &(rec_table[datasetnumber].attributes);
if(number>=(*attribs).getSize()) return -1; // > number of attributes
AttribRef *attrib=&((*attribs)[number]);
if(strlen(attrib->name)>(size_t)maxnamelen){
strncpy(aname,attrib->name,maxnamelen); // don't we want to copy the other way?
aname[maxnamelen-1]='\0';
}
else strcpy(aname,attrib->name);
aname[maxnamelen-1]='\0'; // make certain it is null capped
AttributeRecordHdr attribhdr;
IEEEIO::lseek((*attribs)[number].offset,L_SET);
RecordHdr::read(this,current_rec);
AttributeRecordHdr::read(this,attribhdr);
//printf("IEEEIO:attribrechdr = ds,nt,ns %d,%d,%d\n",
// attribhdr.datasize,
// attribhdr.numbertype,
// attribhdr.namesize);
typeID = Int2DataType(attribhdr.numbertype);
nelem = attribhdr.datasize/sizeOf(typeID);
return -1;
}
int IEEEIO::readAttributeInfo(CONST char *aname,IObase::DataType &typeID,Long &nelem){
// by name
if(accessmode==IObase::Write) return -1;
FlexArray<AttribRef> *attribs= &(rec_table[datasetnumber].attributes);
for(int i=0;i<attribs->getSize();i++){
if(!strcmp(aname,(*attribs)[i].name)){
// must read the record to get this info
AttributeRecordHdr attribhdr;
IEEEIO::lseek((*attribs)[i].offset,L_SET);
RecordHdr::read(this,current_rec);
AttributeRecordHdr::read(this,attribhdr);
typeID = Int2DataType(attribhdr.numbertype);
nelem = attribhdr.datasize/sizeOf(typeID);
return i;
}
}
return -1; // Attribute not found
}
int IEEEIO::readAttribute(int number,void *data){
if(accessmode==IObase::Write) return -1;
FlexArray<AttribRef> *attribs= &(rec_table[datasetnumber].attributes);
if(number>=(*attribs).getSize()) return -1; // > number of attributes
AttributeRecordHdr attribhdr;
IEEEIO::lseek((*attribs)[number].offset,L_SET);
RecordHdr::read(this,current_rec);
AttributeRecordHdr::read(this,attribhdr);
IObase::DataType typeID = Int2DataType(attribhdr.numbertype);
if(typeID==IObase::Error) return -1; // read failed due to bad datatype
// Long8 nelem = attribhdr.datasize/sizeOf(typeID);
IEEEIO::lseek(attribhdr.namesize,L_INCR);
int sz=IEEEIO::read(data,attribhdr.datasize)/sizeOf(typeID);
if(swapbytes) byteswapBuffer(data,sz,sizeOf(typeID));
if(typeID==IObase::String){
char *cdata=(char *)data;
cdata[sz]='\0'; /* Null Terminate String data */
}
return sz; // returns number of elements read
}
int IEEEIO::nAttributes(){
if(datasetnumber<0 || accessmode == IObase::Write) return -1;
return rec_table[datasetnumber].attributes.getSize();
}
//================Chunking Interface-----------------------
void IEEEIO::clearChunk(int nbytes){
#ifdef T3E
#define DISKBLOCKSIZE 128*1024
#else
#define DISKBLOCKSIZE 8192
#endif
// This is a wasteful feature that will be eliminated in later releases
// This is currently done because I needed the disk space to be zero'ed
// prior to writing for debugging purposes... Could have a writeStream
// class.
int nwritten;
char dummy[DISKBLOCKSIZE];
for(int i=0;i<DISKBLOCKSIZE;i++)
dummy[i]=0; // bzero it (reserve space with zero'ed data)
while(nbytes>DISKBLOCKSIZE){
nwritten=IEEEIO::write(dummy,DISKBLOCKSIZE);
if(nwritten<=0) return; // this aint working
nbytes-=nwritten;
}
if(nbytes>0) IEEEIO::write(dummy,nbytes); // write the remaining bytes
#undef DISKBLOCKSIZE
}
int IEEEIO::reserveChunk(IObase::DataType typeID,int rank,CONST int *dims){
reserveStream(typeID,rank,dims); // sets up the chunking state machine
// clearing does not appear to be needed... just need header
//clearChunk(IObase::nBytes(typeID,rank,dims)); // this pre-clears the reserved area to 0. (inefficient)
return 1;
}
// Chunking should probably include striding....
// But thats a pain since you'll need to read + write to
// Accomplish that (yuck!). Lots of seeking.
// Lets leave striding out for now.
// should also check for contiguous data (eg. slicing) and optimize for that layout
// for now, the streaming interface best serves contiguous data.
int IEEEIO::writeChunk(CONST int *dims,CONST int *origin,const void *data){
int i,sz=-1;
// make sure its the EOF
if(accessmode==IObase::Read) {
fprintf(stderr,"IEEEIO::writeChunk(): Error! Access is ReadOnly\n");
return 0;
}
// should have a "chunk reserved" flag set.
if(current_reserved_chunk!=datasetnumber){
fprintf(stderr,"IEEEIO::writeChunk(): Error! You forgot to reserve space for the chunk using IO::reserveChunk()\n");
return 0;
}
// now we need to seek to the position of the data
int rank = current_dat.rank;
IObase::DataType typeID = IObase::Int2DataType(current_dat.numbertype);
int typesize=sizeOf(typeID);
// Long8 basefileoffset = rec_table[datasetnumber].offset+
Long8 basefileoffset = stream_offset +
RecordHdrSize+DataRecordHdrSize+sizeof(Int)*current_dat.rank; // T3E Kludge
Long8 chunkcolumnsize=dims[0]*typesize; // stride between columns in chunk
Long8 filecolumnsize=chunkdims[0]*typesize; // stride between columns on disk (full array size)
Long8 originoffset;
Long8 accumdims;
for(originoffset=0,accumdims=typesize,i=0;i<rank;i++){
originoffset += (origin[i]*accumdims);
accumdims *= chunkdims[i];
}
for(i=0;i<rank;i++){
if((origin[i]+dims[i])>chunkdims[i]){
fprintf(stderr,"IEEEIO::writeChunk(): ERROR!! specified dims and origin exceed reserved block size\n");
fprintf(stderr,"\tfor dimension %u origin=%u and dims=%u\n",i,origin[i],
dims[i]);
fprintf(stderr,"\torigin+dims=%u whereas the maximum must be less than %u\n",origin[i]+dims[i],chunkdims[i]);
}
}
originoffset+=basefileoffset; // for absolute seeking
Long8 maxindex,minindex;
minindex=basefileoffset;
maxindex=basefileoffset+current_dat.datasize;
int ncolumns; // computed in loop below
for(ncolumns=1,i=1;i<rank;i++) ncolumns*=dims[i];
union { void *data; const void *const_data; } cast_union;
cast_union.const_data = data;
if(swapbytes)
byteswapBuffer(cast_union.data,IObase::nElements(rank,dims),typesize);
for(i=0;i<ncolumns;i++){ // read the columns
if(originoffset<minindex){
fprintf(stderr,"WriteChunk() inconsistency. Writing less than min index\n");
fprintf(stderr,"\tCol[%u]: Requested %u, but minidex= %u\n",
i,(unsigned int)originoffset,(unsigned int)minindex);
}
if(originoffset>maxindex){
fprintf(stderr,"WriteChunk() inconsistency. Writing greater than maximum index\n");
fprintf(stderr,"\tCol[%u]: Requested %u, but maxindex= %u\n",
i,(unsigned int)originoffset,(unsigned int)maxindex);
}
if((originoffset+chunkcolumnsize)>maxindex){
fprintf(stderr,"WriteChunk() inconsistency. This write will overrun the reserved data\n");
fprintf(stderr,"\tCol[%u]: Requested %u, maxindex %u, and the write of %u will run to %u\n",
i,(unsigned int)originoffset,(unsigned int)maxindex,(unsigned int)chunkcolumnsize,(unsigned int)(originoffset+chunkcolumnsize));
}
IEEEIO::lseek(originoffset,L_SET);
sz=IEEEIO::write(((const char*)data)+i*chunkcolumnsize,(int)chunkcolumnsize);
originoffset+=filecolumnsize;
for(Long8 j=1,idx=dims[1],planesize=filecolumnsize;
j<(rank-1) && !((i+1)%idx);
idx*=dims[++j]){
Long8 extraoffset=planesize*(chunkdims.getData()[j]-dims[j]);
originoffset+=extraoffset;
planesize*=dims[j];
}
}
// now swap the data back to native order...
if(swapbytes)
byteswapBuffer(cast_union.data,IObase::nElements(rank,dims),typesize);
return sz;
}
int IEEEIO::readChunk(CONST int *dims,CONST int *origin,void *data){
int sz=-1,i;
if(accessmode!=IObase::Read && accessmode!=IObase::Append)
return 0;
// gonna have to stride through this sucker... (yuck)
// use the same chunkdims for this. Must set during readinfo...
// now we need to seek to the position of the data
int rank = current_dat.rank;
IObase::DataType typeID = IObase::Int2DataType(current_dat.numbertype);
int typesize=sizeOf(typeID);
Long8 basefileoffset = rec_table[datasetnumber].offset+
// sizeof(RecordHdr)+sizeof(DataRecordHdr)+sizeof(Int)*current_dat.rank;
RecordHdrSize+DataRecordHdrSize+sizeof(Int)*current_dat.rank; // T3E Kludge
Long8 chunkcolumnsize=dims[0]*typesize; // stride between columns in chunk
Long8 filecolumnsize=chunkdims[0]*typesize; // stride between columns on disk (full array size)
Long8 originoffset;
Long8 accumdims;
// compute the offset into the data on disk required by the chunk origin (initial offset)
for(originoffset=0,accumdims=typesize,i=0;i<rank;i++){
originoffset += (origin[i]*accumdims);
accumdims *= chunkdims[i];
}
originoffset+=basefileoffset; // for absolute seeking
Long8 ncolumns; // computed in loop below
for(ncolumns=1,i=1;i<rank;i++) ncolumns*=dims[i];
for(i=0;i<ncolumns;i++){ // read the columns
IEEEIO::lseek(originoffset,L_SET);
sz=IEEEIO::read(((char*)data)+i*chunkcolumnsize,(int)chunkcolumnsize);
originoffset+=filecolumnsize;
for(Long8 j=1,idx=dims[1],planesize=filecolumnsize;
j<(rank-1) && !((i+1)%idx);
idx*=dims[++j]){
Long8 extraoffset=planesize*(chunkdims.getData()[j]-dims[j]);
originoffset+=extraoffset;
planesize*=dims[j];
}
}
// now swap the data back to native order...
if(swapbytes)
byteswapBuffer(data,IObase::nElements(rank,dims),typesize);
return sz;
}
// Nearly identical to reserveChunk except that we don't need to pre-clear
// the space to 0 for streamed data.
int IEEEIO::reserveStream(IObase::DataType typeID,int rank,CONST int *dims){
int i;
RecordHdr rec;
DataRecordHdr hdr;
// make sure its the EOF
if(accessmode==IObase::Read) return 0;
if(rec_table.getSize()>0){
Long8 endpos = rec_table[rec_table.getSize()-1].end_offset;
IEEEIO::lseek(endpos,L_SET); // don't know if this is costly
}
else {
IEEEIO::lseek(0,L_XTND); // seek to end of file
}
// if 0-length seeks are costly, then alternative
// logic can be constructed to ensure writes to end of file
if(chunkdims.getSize() != rank)
chunkdims.setSize(rank); // KLUDGE!
for(i=0,hdr.datasize=1;i<rank;i++) {
hdr.datasize*=dims[i];
chunkdims[i]=dims[i];
}
cur_type_size=sizeOf(typeID); // KLUDGE: for writeStream()
hdr.datasize*=sizeOf(typeID);
hdr.numbertype=typeID;
hdr.rank=rank;
// if last annotation slot is filled, it is a pointer
// to another block of 8 annotation pointers.
rec.recordtype = DataRecord;
rec.recordsize = hdr.datasize +
DataRecordHdrSize + // T3E Kludge
sizeof(Int) * rank; // need to change sizeof(Int) to something larger? For 64, yes!
rec.sequenceID = datasetnumber = ndatasets++;
// need to byteswap the header and records if swapbytes==True
current_dat=hdr; // first copy native info to current
current_rec=rec;
RecordHdr::write(this,rec);
current_dat_offset = current_rec_offset = getPosition();
DataRecordHdr::write(this,hdr);
union { void *data; const void *const_data;} cast_union;
cast_union.const_data = chunkdims.getData();
if(swapbytes) byteswapBuffer(cast_union.data,rank,sizeof(Int));
IEEEIO::write(cast_union.const_data,sizeof(Int)*rank); // for better for worse...
if(swapbytes) byteswapBuffer(cast_union.data,rank,sizeof(Int)); // swap back
// OK, now writing 8k at a time, reserve the space with 0's
current_reserved_chunk=datasetnumber;
DataRef dref;
dref.rec=current_rec;
dref.offset=current_rec_offset-RecordHdrSize;
dref.end_offset=current_rec_offset+current_rec.recordsize;
if(accessmode!=IObase::Write)
rec_table.append(dref);
// else (JMS debugging change 5/12/98)
stream_offset = current_rec_offset-RecordHdrSize;
streaming=0;
return 1;
}
int IEEEIO::writeStream(const void *data,int length){
Long8 len;
if(!streaming){// seek to starting offset
Long8 basefileoffset = stream_offset +
RecordHdrSize+DataRecordHdrSize+sizeof(Int)*current_dat.rank;
IEEEIO::lseek(basefileoffset,L_SET);
streaming=1;
}
// need to do a bounds check on the stream... for now it'll play dumb...
Long8 nbytes=cur_type_size * length;
len = IEEEIO::write(data,nbytes); // record file position??
if(len<0)
return -1; // write failure
return len;
}
int IEEEIO::readStream(void *data,int length){
int len;
if(!streaming){// seek to starting offset
Long8 basefileoffset = rec_table[datasetnumber].offset+
RecordHdrSize+DataRecordHdrSize+sizeof(Int)*current_dat.rank;
IEEEIO::lseek(basefileoffset,L_SET);
streaming=1;
}
// need to do a bounds check on the stream... for now it'll play dumb...
int typesize= sizeOf(Int2DataType(current_dat.numbertype));
Long8 nbytes = typesize * length;
len = IEEEIO::read((char *)data,nbytes);
if(len<0)
return -1; // read failure
else
if(swapbytes) byteswapBuffer(data,length,typesize);
return len;
}
void IEEEIO::bufferOn(long size){
if(writebuffer) {
if(size==0)
bufferOff();
return;
}
else {
// if not Windows, use fstat() to choose optimal blocksiz
#if !defined(WIN32) && !defined(T3E)
if(size<0){
struct stat mystat;
fstat(fid,&mystat);
size=mystat.st_blksize;
}
#endif
// if windows then take a wild guess
#ifdef T3E
size=(size<=64)?8*1024*1024:size; // 8Meg is a good guess for T3E
#else
size=(size<=64)?8*1024:size; //(8k is a good guess for workstations/WinTel)
#endif
#ifdef SGI
{ // allocate the buffer block-aligned (most imp for DirIO)
struct stat mystat;
fstat(fid,&mystat);
writebuffer = (char*)memalign(mystat.st_blksize,size);
}
#else
writebuffer = new char[size];
#endif
}
writebuffersize=size;
writebuffercount=0;
}
void IEEEIO::bufferOff(){
if(!writebuffer) return;
if(fid<0 && writebuffercount>0){
fprintf(stderr,"IEEEIO::bufferOff() ERROR!!!!");
fprintf(stderr,"\tFile %s is either paused or invalid, so I can't deallocate the write buffer safely\n",filename);
return;
}
//printf("bufferoff on a=%ld v=%ld f=%ld b=%d\n",
// actual_position,virtual_position,file_length,writebuffercount);
this->flush();
#ifdef SGI // block-aligned write buffer
free(writebuffer);
#else
delete writebuffer;
#endif
writebuffer=0;
}
int IEEEIO::pause(){
if(fid<0) return 0; // fail
this->flush(); // flush the buffer to pause
savedposition=getPosition();
close(fid);
fid=-1;
return 1; // success
}
int IEEEIO::resume(){
if(fid>=0 || savedposition<0) return 0; // fail
switch(IObase::accessmode){
case IObase::Read:
fid=open(filename,O_RDONLY,0644);
break;
case IObase::Write:
fid=open(filename,O_WRONLY,0644);
break;
case IObase::Append:
fid=open(filename,O_RDWR,0644);
break;
}
if(fid<0){
printf("IEEEIO::resume failed for file %s\n",filename);
return -1;
}
::lseek(fid,savedposition,L_SET); // this is OK..
savedposition=-1;
return 1; // success
}
//=================== Experimental MPIO methods =================
void IEEEIO::getFilename(char *fn,int maxlen){
strncpy(fn,filename,maxlen-1);
}
int IEEEIO::reserveStream(IObase::DataType typeID,int rank,CONST int *dims,Long8 &soffset){
int rv=this->reserveStream(typeID,rank,dims);
soffset = stream_offset + RecordHdrSize+DataRecordHdrSize+sizeof(Int)*
current_dat.rank;
return rv;
}
// writes to explicit offset in file!
// always overrides the current filepointer position!
// only useful for the master process *if* it
// must write to a non-zero location
// *** So the usage scenario is that the master
// has the IEEEIO file handle and getFilename() is
// used to pass the name of the file to the slave procs
// which open it O_WRITE. The master gets the offset
// for a particular stream from the special version
// of the method reserverStream and uses that to position
// their respective file pointers. All slaves and
// the master then write to the file simultaneously to
// different file offsets. It remains to be seen how
// well this works without O_DIRECT. We can use timing
// loops to stagger the writes somewhat though.
int IEEEIO::writeStream(const void *data,int length,Long8 soffset){
IEEEIO::lseek(soffset,L_SET);
streaming=1;
return writeStream(data,length);
}
/*********************Fortran Interface**********************/
Long8 f_ieee_open (char *file,char *accessname,int flen,int alen){
alen = alen;
flen = flen;
// would have used tolower(), but it doesn't exist everywhere.... :(
IObase::AccessMode mode;
if(*accessname=='R' || *accessname=='r')
mode=IObase::Read;
else if(*accessname=='W' || *accessname=='w' ||
*accessname=='C' || *accessname=='c')
mode=IObase::Write;
else if(*accessname=='A' || *accessname=='a')
mode=IObase::Append;
else {
fprintf(stderr,"IEEEopen(): Error unknown option [%s] to open file %s\n",
accessname,file);
return 0;
}
IObase *fid=new IEEEIO(file,mode);
if(fid->isValid())
return (Long8)fid;
else
delete fid; // file open failed
return 0;
}
/*
Fortran passes strings without 0-bytes.
C requires a 0-byte at the end of a string.
We may not modify the passed string, because it
might reside in a read only text segment, thus
we need a local copy to append a 0-byte.
Performance is not an issue here, because file access
is much slower than this little memory shifting anyway.
*/
Long8 f_ieee_openr(char *filename,int namelen){
char*fn = new char[namelen+1];
strncpy(fn, filename, namelen);
fn[namelen]='\0';
Long8 ID = (Long8)(new IEEEIO(filename,IObase::Read));
delete fn;
return ID;
}
Long8 f_ieee_openw(char *filename,int namelen){
char*fn = new char[namelen+1];
strncpy(fn, filename, namelen);
fn[namelen]='\0';
Long8 ID = (Long8)(new IEEEIO(filename,IObase::Write));
delete fn;
return ID;
}
Long8 f_ieee_opena(char *filename,int namelen){
char*fn = new char[namelen+1];
strncpy(fn, filename, namelen);
fn[namelen]='\0';
Long8 ID = (Long8)(new IEEEIO(filename,IObase::Append));
delete fn;
return ID;
}
void ieee_bufon(Long8 *fileID,int bufsize){
IEEEIO *f=(IEEEIO*)(*fileID);
if(bufsize<0) f->bufferOn(); // use default size
else f->bufferOn(bufsize); // or specify
}
void ieee_bufoff(Long8 *fileID){
IEEEIO *f=(IEEEIO*)(*fileID);
f->bufferOff();
}
IOFile IEEEopen(char *filename,char *accessname){
// Parse all of the ansi stdio access option strings
IObase::AccessMode mode;
if(!strcmp(accessname,"read") ||
!strcmp(accessname,"r") ||
!strcmp(accessname,"rb"))
mode=IObase::Read;
else if(*accessname=='a')
mode=IObase::Append;
else if(!strcmp(accessname,"write") ||
!strcmp(accessname,"create") ||
!strcmp(accessname,"w") ||
!strcmp(accessname,"wb") ||
!strcmp(accessname,"w+") ||
!strcmp(accessname,"w+b") ||
!strcmp(accessname,"wb+"))
mode=IObase::Write;
else{
fprintf(stderr,"IEEEopen(): Error unknown option [%s] to open file %s\n",
accessname,filename);
return 0;
}
IObase *fid=new IEEEIO(filename,mode);
if(fid->isValid())
return (IOFile)fid;
else
delete fid; // file open failed
return 0; // unknown option
}
IOFile IEEEopenRead(char *filename){
return (IOFile)(new IEEEIO(filename,IObase::Read));
}
IOFile IEEEopenWrite(char *filename){
return (IOFile)(new IEEEIO(filename,IObase::Create));
}
IOFile IEEEopenAppend(char *filename){
return (IOFile)(new IEEEIO(filename,IObase::Append));
}
void IEEEbufferOn(IOFile fileID,int bufsize){
IEEEIO *f=(IEEEIO*)fileID;
if(bufsize<0) f->bufferOn(); // use default size
else f->bufferOn(bufsize); // or specify
}
void IEEEbufferOff(IOFile fileID){
IEEEIO *f=(IEEEIO*)fileID;
f->bufferOff();
}
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