9 More Discussions You Might Find Interesting
1. Programming
This is from a program I wrote over in 1998 that I am trying to compile on a linux machine:
void write_line (FILE *fp, int rec_no, line_rec *arec)
{
fpos_t woffset;
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fwrite(arec,sizeof(line_rec),1,fp);
}On the line... (2 Replies)
Discussion started by: wbport
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2. Programming
i'm using a C program and running it on a linux server, i got 2 adressess of 2 variables, and 2 addresses of 2 chars, and compared it. and got the size of a int and the size of a char.
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also if i do &a-&b i get 1, but if i... (30 Replies)
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3. Web Development
Hi everybody,
I`m very new with PHP and Databases and I having the follow issue with prices data..
The original information is in CSV files.
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4. Shell Programming and Scripting
I am using perl 5.8.0.
I need to check some values to see it they are floats. Our system does not have Data::Types so I can't use is_float. Is there something else that I can use? The only thing in Data is Dump.pm. I am not allowed to download anything to our system so I have to use what I have.... (3 Replies)
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5. AIX
Hello,
I get this message : "Value too large to be stored in data type" when I try to open a 3Gb file.
Can someone helps me to resolve the problem.
Thank you very much (5 Replies)
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6. Shell Programming and Scripting
Where to start?
Ok, I need to pick up a Worldpay exchange rates file from a url such as:
https://select.worldpay.com/wcc/info?op=rates&instId=12345&op=rates-today
the http response returns a exchange rates file with content-type "text/plain" content as below:
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7. Programming
I am writing some code to do analysis on the file system (HP-UX 11.11).
I am using stat(..) to get file information. My problem is that the file-size may exceed the data types defined in 'sys/stat.h' & 'sys/types.h' respectively.
Thus file-sizes in the Giga-byte range are not read correctly.... (2 Replies)
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8. Programming
Hi,
I am trying to understand an very old C program.
....
time_t start, end;
ptr = localtime(&start);
...
fprintf(out, "%-35s 01 %5s %2s %10d 1 5 /tty/M%d/%02d %24s", buffer3, job, ver, start, mach_num,atoi(buffer), asctime(ptr));
fprintf(out, "%-35s 03 %5s %2s %10d 1 5... (9 Replies)
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9. Programming
Hi all,
Can anyone tell me a little about the datatype FILE, which represents stream. What does its structure look like, and in which header file is it defined and so on...
Ex :
FILE *fp ;
fp = fopen("filename", "w") ; (6 Replies)
Discussion started by: milhan
6 Replies
MPI_File_get_type_extent(3OpenMPI) MPI_File_get_type_extent(3OpenMPI)
NAME
MPI_File_get_type_extent - Returns the extent of the data type in a file.
SYNTAX
C Syntax
#include <mpi.h>
int MPI_File_get_type_extent(MPI_File fh, MPI_Datatype
datatype, MPI_Aint *extent)
Fortran Syntax (see FORTRAN 77 NOTES)
INCLUDE 'mpif.h'
MPI_FILE_GET_TYPE_EXTENT(FH, DATATYPE, EXTENT, IERROR)
INTEGER FH, DATATYPE, IERROR
INTEGER(KIND=MPI_ADDRESS_KIND) EXTENT
C++ Syntax
#include <mpi.h>
MPI::Aint MPI::File::Get_type_extent(const MPI::Datatype&
datatype) const
INPUT PARAMETERS
fh File handle (handle).
datatype Data type (handle).
OUTPUT PARAMETERS
extent Data type extent (integer).
IERROR Fortran only: Error status (integer).
DESCRIPTION
MPI_File_get_type_extent can be used to calculate extent for datatype in the file. The extent is the same for all processes accessing the
file associated with fh. If the current view uses a user-defined data representation, MPI_File_get_type_extent uses the
dtype_file_extent_fn callback to calculate the extent.
FORTRAN 77 NOTES
The MPI standard prescribes portable Fortran syntax for the EXTENT argument only for Fortran 90. FORTRAN 77 users may use the non-portable
syntax
INTEGER*MPI_ADDRESS_KIND EXTENT
where MPI_ADDRESS_KIND is a constant defined in mpif.h and gives the length of the declared integer in bytes.
NOTES
If the file data representation is other than "native," care must be taken in constructing etypes and file types. Any of the data-type con-
structor functions may be used; however, for those functions that accept displacements in bytes, the displacements must be specified in
terms of their values in the file for the file data representation being used. MPI will interpret these byte displacements as is; no scal-
ing will be done. The function MPI_File_get_type_extent can be used to calculate the extents of data types in the file. For etypes and
file types that are portable data types, MPI will scale any displacements in the data types to match the file data representation. Data
types passed as arguments to read/write routines specify the data layout in memory; therefore, they must always be constructed using dis-
placements corresponding to displacements in memory.
ERRORS
Almost all MPI routines return an error value; C routines as the value of the function and Fortran routines in the last argument. C++ func-
tions do not return errors. If the default error handler is set to MPI::ERRORS_THROW_EXCEPTIONS, then on error the C++ exception mechanism
will be used to throw an MPI:Exception object.
Before the error value is returned, the current MPI error handler is called. For MPI I/O function errors, the default error handler is set
to MPI_ERRORS_RETURN. The error handler may be changed with MPI_File_set_errhandler; the predefined error handler MPI_ERRORS_ARE_FATAL may
be used to make I/O errors fatal. Note that MPI does not guarantee that an MPI program can continue past an error.
Open MPI 1.2 September 2006 MPI_File_get_type_extent(3OpenMPI)
