boolean.h

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#ifndef CLIBS_BOOLEAN_H
#define CLIBS_BOOLEAN_H
 
#if defined(_WIN32)
    /* On Windows, use the native Win32 BOOL */
    #include <windows.h>
 
#else  /* Not Windows */
 
    #ifndef CLIBS_BOOL_DEFINED
 
        #if defined(__cplusplus)
            typedef bool BOOL;
            #define TRUE  true
            #define FALSE false
 
        #elif defined(__STDC_VERSION__) && __STDC_VERSION__ >= 199901L
            #include <stdbool.h>
            typedef bool BOOL;
            #define TRUE  true
            #define FALSE false
 
        #else
            typedef unsigned char BOOL;
            #define TRUE  1
            #define FALSE 0
        #endif
 
        #define CLIBS_BOOL_DEFINED
    #endif  /* CLIBS_BOOL_DEFINED */
 
#endif  /* _WIN32 */
 
#endif  /* CLIBS_BOOLEAN_H */