jiri/LA_library
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

*** empty log message ***

Browse Source
This commit is contained in:
jiri
2005-02-06 14:01:27 +00:00
parent 1b602fe7a2
commit ac8afe89ad
8 changed files with 146 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

56
auxstorage.h
View File

@@ -21,10 +21,12 @@ class AuxStorage
{
char filename[32];
int fd;
bool deleteme;
size_t recl;
public:
AuxStorage(void);
~AuxStorage(void) {close(fd); unlink(filename);};
AuxStorage(const char *name);
~AuxStorage(void) {close(fd); if(deleteme) unlink(filename);};
void get(NRVec<T> &x, const int pos) const;
void put(const NRVec<T> &x, const int pos);
void get(NRMat<T> &x, const int pos) const;
@@ -42,8 +44,22 @@ unlink(filename);
fd=open(filename,O_CREAT|O_LARGEFILE|O_RDWR,0777);
if(fd<0) {perror(""); laerror("open failed in AuxStorage");}
recl=0;
deleteme=1;
}
template<typename T>
AuxStorage<T>::AuxStorage(const char *name)
{
strcpy(filename,name);
unlink(filename);
fd=open(filename,O_CREAT|O_LARGEFILE|O_RDWR,0777);
if(fd<0) {perror(""); laerror("open failed in AuxStorage");}
recl=0;
deleteme=0;
}
//vectors
template<typename T>
void AuxStorage<T>::get(NRVec<T> &x, const int pos) const
{
@@ -61,5 +77,43 @@ if((off64_t)-1 == lseek64(fd,pos*((off64_t)recl),SEEK_SET)) {perror(""); laerror
if(0>write(fd,&x[0],recl)) {perror(""); laerror("write failed in AuxStorage");}
}
//matrices
template<typename T>
void AuxStorage<T>::get(NRMat<T> &x, const int pos) const
{
if(recl==0) laerror("get from an empty file in AuxStorage");
if((off64_t)-1 == lseek64(fd,pos*((off64_t)recl),SEEK_SET)) {perror(""); laerror("seek failed in AuxStorage");}
if((ssize_t)recl!=read(fd,&x(0,0),recl)) {perror(""); laerror("read failed in AuxStorage");}
}
template<typename T>
void AuxStorage<T>::put(const NRMat<T> &x, const int pos)
{
if(recl) {if(recl!=x.nrows()*x.ncols()*sizeof(T)) laerror("attempt to write objects of different size to one AuxStorage");}
else recl=x.nrows()*x.ncols()*sizeof(T);
if((off64_t)-1 == lseek64(fd,pos*((off64_t)recl),SEEK_SET)) {perror(""); laerror("seek failed in AuxStorage");}
if(0>write(fd,&x(0,0),recl)) {perror(""); laerror("write failed in AuxStorage");}
}
//packed symmetric matrices
template<typename T>
void AuxStorage<T>::get(NRSMat<T> &x, const int pos) const
{
if(recl==0) laerror("get from an empty file in AuxStorage");
if((off64_t)-1 == lseek64(fd,pos*((off64_t)recl),SEEK_SET)) {perror(""); laerror("seek failed in AuxStorage");}
if((ssize_t)recl!=read(fd,&x(0,0),recl)) {perror(""); laerror("read failed in AuxStorage");}
}
template<typename T>
void AuxStorage<T>::put(const NRSMat<T> &x, const int pos)
{
if(recl) {if(recl!=x.nrows()*(x.nrows()+1)/2*sizeof(T)) laerror("attempt to write objects of different size to one AuxStorage");}
else recl=x.nrows()*(x.nrows()+1)/2*sizeof(T);
if((off64_t)-1 == lseek64(fd,pos*((off64_t)recl),SEEK_SET)) {perror(""); laerror("seek failed in AuxStorage");}
if(0>write(fd,&x(0,0),recl)) {perror(""); laerror("write failed in AuxStorage");}
}
#endif