/* ====================================================================
 * The Apache Software License, Version 1.1
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 *       "This product includes software developed by the
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 *    if and wherever such third-party acknowledgments normally appear.
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 *
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 * <http://www.apache.org/>.
 */

#ifndef APR_GENERAL_H
#define APR_GENERAL_H

#include "apr.h"
#include "apr_pools.h"
#include "apr_errno.h"

#if APR_HAVE_SIGNAL_H
#include <signal.h>
#endif

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif

#define MAXIMUM_WAIT_OBJECTS 64

#define APR_ASCII_BLANK  '\040'
#define APR_ASCII_CR     '\015'
#define APR_ASCII_LF     '\012'
#define APR_ASCII_TAB    '\011'

typedef int               apr_signum_t;

/* Finding offsets of elements within structures.
 * Taken from the X code... they've sweated portability of this stuff
 * so we don't have to.  Sigh...
 */

#if defined(CRAY) || (defined(__arm) && !defined(LINUX))
#ifdef __STDC__
#define XtOffset(p_type,field) _Offsetof(p_type,field)
#else
#ifdef CRAY2
#define XtOffset(p_type,field) \
        (sizeof(int)*((unsigned int)&(((p_type)NULL)->field)))

#else /* !CRAY2 */

#define XtOffset(p_type,field) ((unsigned int)&(((p_type)NULL)->field))

#endif /* !CRAY2 */
#endif /* __STDC__ */
#else /* ! (CRAY || __arm) */

#define XtOffset(p_type,field) \
        ((long) (((char *) (&(((p_type)NULL)->field))) - ((char *) NULL)))

#endif /* !CRAY */

#ifdef offsetof
#define XtOffsetOf(s_type,field) offsetof(s_type,field)
#else
#define XtOffsetOf(s_type,field) XtOffset(s_type*,field)
#endif


/* A couple of prototypes for functions in case some platform doesn't 
 * have it
 */
#if (!APR_HAVE_STRCASECMP) && (APR_HAVE_STRICMP) 
#define strcasecmp(s1, s2) stricmp(s1, s2)
#elif (!APR_HAVE_STRCASECMP)
int strcasecmp(const char *a, const char *b);
#endif

#if (!APR_HAVE_STRNCASECMP) && (APR_HAVE_STRNICMP)
#define strncasecmp(s1, s2, n) strnicmp(s1, s2, n)
#elif (!APR_HAVE_STRNCASECMP)
int strncasecmp(const char *a, const char *b, size_t n);
#endif

/*
 * String and memory functions
 */

#if (!APR_HAVE_MEMMOVE)
#define memmove(a,b,c) bcopy(b,a,c)
#endif

/**
 * @package APR Random Functions
 */

#if APR_HAS_RANDOM

/* TODO: I'm not sure this is the best place to put this prototype...*/
/**
 * Generate a string of random bytes.
 * @param buf Random bytes go here
 * @param length size of the buffer
 * @deffunc apr_status_t apr_generate_random_bytes(unsigned char * buf, int length)
 */
APR_DECLARE(apr_status_t) apr_generate_random_bytes(unsigned char * buf, 
                                                    int length);

#endif

/**
 * Setup any APR internal data structures.  This MUST be the first function 
 * called for any APR program.
 * @deffunc apr_status_t apr_initialize(void)
 */
APR_DECLARE(apr_status_t) apr_initialize(void);

/**
 * Tear down any APR internal data structures which aren't torn down 
 * automatically.
 * @tip An APR program must call this function at termination once it 
 *      has stopped using APR services.  The APR developers suggest using
 *      atexit to ensure this is called.
 * @deffunc void apr_terminate(void)
 */
APR_DECLARE(void) apr_terminate(void);

/**
 * Set the APR_ABORT function.
 * @tip This is in for backwards compatability.  If the program using
 *      APR wants APR to exit on a memory allocation error, then this
 *      function should be called to set the function to use in order
 *      to actually exit the program.  If this function is not called,
 *      then APR will return an error and expect the calling program to
 *      deal with the error accordingly.
 * @deffunc apr_status_t apr_set_abort(int (*apr_abort)(int retcode), apr_pool_t *cont)
 */
APR_DECLARE(apr_status_t) apr_set_abort(int (*apr_abort)(int retcode),
                                        apr_pool_t *cont);

#ifdef __cplusplus
}
#endif

#endif  /* ! APR_GENERAL_H */