fftw3: Wisdom Import
4.7.2 Wisdom Import
-------------------
int fftw_import_system_wisdom(void);
int fftw_import_wisdom_from_filename(const char *filename);
int fftw_import_wisdom_from_string(const char *input_string);
int fftw_import_wisdom(int (*read_char)(void *), void *data);
These functions import wisdom into a program from data stored by the
'fftw_export_wisdom' functions above. (
Words of Wisdom-Saving
Plans.) The imported wisdom replaces any wisdom already accumulated
by the running program.
'fftw_import_wisdom' imports wisdom from any input medium, as
specified by the callback function 'read_char'. 'read_char' is a
'getc'-like function that returns the next character in the input; its
parameter is the 'data' pointer passed to 'fftw_import_wisdom'. If the
end of the input data is reached (which should never happen for valid
data), 'read_char' should return 'EOF' (as defined in '<stdio.h>'). For
convenience, the following three "wrapper" routines are provided:
'fftw_import_wisdom_from_filename' reads wisdom from a file named
'filename'. A lower-level function, which requires you to open and
close the file yourself (e.g. if you want to read wisdom from a portion
of a larger file) is 'fftw_import_wisdom_from_file'. This reads wisdom
from the current position in 'input_file' (which should be open with
read permission); upon exit, the file remains open, but the position of
the read pointer is unspecified.
'fftw_import_wisdom_from_string' reads wisdom from the
'NULL'-terminated string 'input_string'.
'fftw_import_system_wisdom' reads wisdom from an
implementation-defined standard file ('/etc/fftw/wisdom' on Unix and GNU
systems).
The return value of these import routines is '1' if the wisdom was
read successfully and '0' otherwise. Note that, in all of these
functions, any data in the input stream past the end of the wisdom data
is simply ignored.
Info Catalog
fftw3: Wisdom Export
fftw3: Wisdom
fftw3: Forgetting Wisdom