/* -*- c -*- */
/**
 * libgamma — Display server abstraction layer for gamma ramp adjustments
 * Copyright © 2014  Mattias Andrée (maandree@member.fsf.org)
 * 
 * This library is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this library.  If not, see <http://www.gnu.org/licenses/>.
 */
#include "libgamma-error.h"


#include <stddef.h>
#include <sys/types.h>
#include <string.h>



/**
 * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned.
 */
gid_t libgamma_group_gid = 0;

/**
 * Group that the user needs to be a member of if `LIBGAMMA_DEVICE_REQUIRE_GROUP` is returned,
 * `NULL` if the name of the group `libgamma_group_gid` cannot be determined.
 */
const char* libgamma_group_name = NULL;



£>set -u
£>cd info
£>export PATH=".:${PATH}"


/**
 * Returns the name of the definition associated with a libgamma error code.
 * 
 * @param   value  The error code.
 * @return         The name of the definition associated with the error code,
 *                 `NULL` if the error code does not exist. The return string
 *                 should not be `free`:d.
 */
const char* libgamma_name_of_error(int value)
{
  static const char* error_names[] =
    {
£>for error in $(libgamma-error-extract --list); do
      "£{error}",
£>done
    };
  
  if ((value < LIBGAMMA_ERROR_MIN) || (value >= 0))
    return NULL;
  
  return error_names[-value - 1];
}


/**
 * Return the value of a libgamma error definition refered to by name.
 * 
 * @param   name  The name of the definition associated with the error code.
 * @return        The error code, zero if the name does is `NULL`
 *                or does not refer to an libgamma error.
 */
int libgamma_value_of_error(const char* name)
{
  if (name == NULL)
    return 0;
  
£>for error in $(libgamma-error-extract --list); do
  if (!strcmp(name, "£{error}"))  return £{error};
£>done
  
  return 0;
}