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The library provides functions for reading and writing permutations to a
file as binary data or formatted text.
- Function: int gsl_permutation_fwrite (FILE * stream, const gsl_permutation * p)
-
This function writes the elements of the permutation p to the
stream stream in binary format. The function returns
GSL_EFAILED
if there was a problem writing to the file. Since the
data is written in the native binary format it may not be portable
between different architectures.
- Function: int gsl_permutation_fread (FILE * stream, gsl_permutation * p)
-
This function reads into the permutation p from the open stream
stream in binary format. The permutation p must be
preallocated with the correct length since the function uses the size of
p to determine how many bytes to read. The function returns
GSL_EFAILED
if there was a problem reading from the file. The
data is assumed to have been written in the native binary format on the
same architecture.
- Function: int gsl_permutation_fprintf (FILE * stream, const gsl_permutation * p, const char *format)
-
This function writes the elements of the permutation p
line-by-line to the stream stream using the format specifier
format, which should be suitable for a type of size_t. On a
GNU system the type modifier
Z
represents size_t
, so
"%Zu\n"
is a suitable format. The function returns
GSL_EFAILED
if there was a problem writing to the file.
- Function: int gsl_permutation_fscanf (FILE * stream, gsl_permutation * p)
-
This function reads formatted data from the stream stream into the
permutation p. The permutation p must be preallocated with
the correct length since the function uses the size of p to
determine how many numbers to read. The function returns
GSL_EFAILED
if there was a problem reading from the file.
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