{ Copyright 2000-2005 The Apache Software Foundation or its licensors, as
 * applicable.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 }

{
 * @file apr_general.h
 * This is collection of oddballs that didn't fit anywhere else,
 * and might move to more appropriate headers with the release
 * of APR 1.0.
 * @brief APR Miscellaneous library routines
 }

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

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

{
 * @defgroup apr_general Miscellaneous library routines
 * @ingroup APR 
 * This is collection of oddballs that didn't fit anywhere else,
 * and might move to more appropriate headers with the release
 * of APR 1.0.
 }

const
{ a space }
  APR_ASCII_BLANK = #040;
{ a carrige return }
  APR_ASCII_CR    = #015;
{ a line feed }
  APR_ASCII_LF    = #012;
{ a tab }
  APR_ASCII_TAB   = #011;

{ signal numbers typedef }
type
  apr_signum_t = Integer;

{
 * 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...
 * @param p_type pointer type name
 * @param field  data field within the structure pointed to
 * @return offset
 }

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

#else} { !CRAY2 }

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

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

//#define APR_OFFSET(p_type,field) \
//        ((long) (((AnsiChar *) (&(((p_type)NULL)->field))) - ((AnsiChar *) NULL)))

//#endif { !CRAY }

{
 * Finding offsets of elements within structures.
 * @param s_type structure type name
 * @param field  data field within the structure
 * @return offset
 }
{#if defined(offsetof) && !defined(__cplusplus)
#define APR_OFFSETOF(s_type,field) offsetof(s_type,field)
#else
#define APR_OFFSETOF(s_type,field) APR_OFFSET(s_type*,field)
#endif}

{$ifndef DOXYGEN}

{ 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 AnsiChar *a, const AnsiChar *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 AnsiChar *a, const AnsiChar *b, size_t n);
#endif}

{$endif}

{
 * Alignment macros
 }

{ APR_ALIGN() is only to be used to align on a power of 2 boundary }
{#define APR_ALIGN(size, boundary) \
    (((size) + ((boundary) - 1)) & ~((boundary) - 1))}

{ Default alignment }
//#define APR_ALIGN_DEFAULT(size) APR_ALIGN(size, 8)


{
 * String and memory functions
 }

{ APR_STRINGIFY is defined here, and also in apr_release.h, so wrap it }
{$ifndef APR_STRINGIFY}
{ Properly quote a value as a string in the C preprocessor }
//#define APR_STRINGIFY(n) APR_STRINGIFY_HELPER(n)
{ Helper macro for APR_STRINGIFY }
{#define APR_STRINGIFY_HELPER(n) #n}
{$endif}

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

#if (!APR_HAVE_MEMCHR)
void *memchr(const void *s, int c, size_t n);
#endif}

{
 * @defgroup apr_library Library initialization and termination
 }

{
 * Setup any APR internal data structures.  This MUST be the first function 
 * called for any APR library.
 * @remark See apr_app_initialize if this is an application, rather than
 * a library consumer of apr.
 }
function apr_initialize: apr_status_t;
 {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
 external LibAPR name LibNamePrefix + 'apr_initialize' + LibSuff0;

{
 * Set up an application with normalized argc, argv (and optionally env) in
 * order to deal with platform-specific oddities, such as Win32 services,
 * code pages and signals.  This must be the first function called for any
 * APR program.
 * @param argc Pointer to the argc that may be corrected
 * @param argv Pointer to the argv that may be corrected
 * @param env Pointer to the env that may be corrected, may be NULL
 * @remark See apr_initialize if this is a library consumer of apr.
 * Otherwise, this call is identical to apr_initialize, and must be closed
 * with a call to apr_terminate at the end of program execution.
 }
function apr_app_initialize(argc: PInteger; argv, env: PPAnsiChar): apr_status_t;
 {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
 external LibAPR name LibNamePrefix + 'apr_app_initialize' + LibSuff12;

{
 * Tear down any APR internal data structures which aren't torn down 
 * automatically.
 * @remark 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.  When using APR from a language
 *         other than C that has problems with the calling convention, use
 *         apr_terminate2() instead.
 }
procedure apr_terminate;
 cdecl; external LibAPR name 'apr_terminate';

{
 * Tear down any APR internal data structures which aren't torn down 
 * automatically, same as apr_terminate
 * @remark An APR program must call either the apr_terminate or apr_terminate2 
 *         function once it it has finished using APR services.  The APR 
 *         developers suggest using atexit(apr_terminate) to ensure this is done.
 *         apr_terminate2 exists to allow non-c language apps to tear down apr, 
 *         while apr_terminate is recommended from c language applications.
 }
procedure apr_terminate2;
 cdecl; external LibAPR name LibNamePrefix + 'apr_terminate2' + LibSuff0;

{
 * @defgroup apr_random Random Functions
 }

{$if defined(APR_HAS_RANDOM) or defined(DOXYGEN)}

{ TODO: I'm not sure this is the best place to put this prototype...}
{
 * Generate random bytes.
 * @param buf Buffer to fill with random bytes
 * @param length Length of buffer in bytes (becomes apr_size_t in APR 1.0)
 }
function apr_generate_random_bytes(buf: PAnsiChar; length: Integer): apr_status_t;
 {$IFDEF WINDOWS} stdcall; {$ELSE} cdecl; {$ENDIF}
 external LibAPR name LibNamePrefix + 'apr_generate_random_bytes' + LibSuff8;

{$endif}

