read_spectra_from_config_file - Reads spectra from a config file
Example compile flags (system dependent):
-DLINUX_X86_64 -DLINUX_X86_64_OPTERON -DGNU_COMPILER
-lKJB -lfftw3 -lgsl -lgslcblas -ljpeg -lSVM -lstdc++ -lpthread -lSLATEC -lg2c -lacml -lacml_mv -lblas -lg2c -lncursesw
const char *env_var,
const char *directory,
const char *file_name,
const char *message_name,
This routine reads spectra from a configuration file, checking several
possible locations for the file. If the parameter "env_var" is not NULL, then
it first tries using this string as the configuration file name. Next it
looks for "file_name" in the current directory, then the user's home
directory, and, depending on how the library was built, then the "shared"
home directory and/or the programmer's home directory. If "directory" is not
NULL, then it is used as a sub-directory in all paths starting from a home
directory (i.e., all paths except the current directory).
The parameter message_name can be used to specify a name for the
configuration file to be used in error and verbose output messages. If
message_name is NULL, then "configuration" is used.
If the buffer config_file_name is not NULL, then the file name actually used
is copied into it. If it is used, then its size must be passed in via
Either NO_ERROR, or ERROR, with an appropriate error message being set.
Suppose directory is "x" and file_name is "y". Also supposed that the
shared directory is "~iis" (compiled in constant) and the programmer's
directory is "~kobus" (another compiled in constant). Then the following
files are tried in the order listed.
The file name actually used is put into the buffer config_file_name whose
size must be passed in via max_len;
The spectra *result_sp_ptr is created or resized as necessary.
If file_name is the special name "off" (or "none" or "0"), then the above
does not apply. In this case, *result_sp_ptr is freed and set to NULL.
Spectra is plural! This routine will read as many spectra from the file
as there are. Normally the file is in Kobus's spectra file format which
has a line including the number for intervals, the interval size, and the
first interval wavelength in nano-meterst. If no such line is present,
then the values for the PhotoResearch PR-650 are used which is equivalent
to having the following header:
#! t=s n=101 o=380 s=4
(Note that the "#" is resettable by the user option "comment-char", and
the "!" is resettable by the user option "header-char").
This software is not adequatedly tested. It is recomended that
results are checked independantly where appropriate.