NAME

read_lut_from_config_file - Reads lut from a config file

SYNOPSIS

#include "m/m_lut.h"

Example compile flags (system dependent):
  -DLINUX_X86_64 -DLINUX_X86_64_OPTERON  -DGNU_COMPILER 
   -I/home/kobus/include
   -L/home/kobus/misc/load/linux_x86_64_opteron -L/usr/lib/x86_64-linux-gnu
  -lKJB                               -lfftw3  -lgsl -lgslcblas -ljpeg  -lSVM -lstdc++                    -lpthread -lSLATEC -lg2c    -lacml -lacml_mv -lblas -lg2c      -lncursesw 


int read_lut_from_config_file
(
	Lut **result_lp_ptr,
	const char *env_var,
	const char *directory,
	const char *file_name,
	const char *message_name,
	char *config_file_name,
	size_t config_file_name_size
);

DESCRIPTION

This routine reads a lut 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 config_file_name_size;

RETURNS

Either NO_ERROR, or ERROR, with an appropriate error message being set.

EXAMPLE

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.
            ./y
            ~/x/y
            ~iis/x/y
            ~kobus/x/y
The file name actually used is put into the buffer config_file_name whose size must be passed in via max_len; The lut *result_lp_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_lp_ptr is freed and set to NULL.

DISCLAIMER

This software is not adequatedly tested. It is recomended that results are checked independantly where appropriate.

AUTHOR

Kobus Barnard

DOCUMENTER

Kobus Barnard

SEE ALSO

create_lut , free_lut , get_target_lut , copy_lut , convert_lut , read_lut , fp_read_lut , write_lut , fp_write_lut , apply_lut_inverse