Versioning.m

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/* ActiveResourceKit Versioning.m
 *
 * Copyright © 2011, 2012, Roy Ratcliffe, Pioneering Software, United Kingdom
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the “Software”), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in
 *  all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED “AS IS,” WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO
 * EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES
 * OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 ******************************************************************************/

#import "Versioning.h"

NSString *ActiveResourceKitVersionString()
{
    // The implementation assumes that the raw C-language version string
    // terminates with null. It also trims assuming that the very last character
    // is a terminating line feed. Also assumes UTF-8 encoding.
    static NSString *__strong versionString;
    if (versionString == nil)
    {
        versionString = [[NSString stringWithCString:(const char *)kActiveResourceKitVersionString encoding:NSUTF8StringEncoding] stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
        atexit_b(^(void) {
            versionString = nil;
        });
    }
    return versionString;
}