/* 
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You 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.
 */

#if !defined(hycomp_h)
#define hycomp_h

/**
 * USE_PROTOTYPES:         Use full ANSI prototypes.
 *
 * CLOCK_PRIMS:            We want the timer/clock prims to be used
 *
 * LITTLE_ENDIAN:          This is for the intel machines or other
 *                         little endian processors. Defaults to big endian.
 *
 * NO_LVALUE_CASTING:      This is for compilers that don't like the left side
 *                         of assigns to be cast.  It hacks around to do the
 *                         right thing.
 *
 * ATOMIC_FLOAT_ACCESS:    So that float operations will work.
 *
 * LINKED_USER_PRIMITIVES: Indicates that user primitives are statically linked
 *                         with the VM executeable.
 *
 * OLD_SPACE_SIZE_DIFF:    The 68k uses a different amount of old space.
 *                         This "legitimizes" the change.
 *
 * SIMPLE_SIGNAL:          For machines that don't use real signals in C.
 *                         (eg: PC, 68k)
 *
 * OS_NAME_LOOKUP:         Use nlist to lookup user primitive addresses.
 *
 * VMCALL:                 Tag for all functions called by the VM.
 *
 * VMAPICALL:              Tag for all functions called via the PlatformFunction
 *                         callWith: mechanism.
 *      
 * SYS_FLOAT:              For some math functions where extended types (80 or 96 bits) are returned
 *                         Most platforms return as a double
 *
 * FLOAT_EXTENDED:         If defined, the type name for extended precision floats.
 *
 * PLATFORM_IS_ASCII:      Must be defined if the platform is ASCII
 *
 * EXE_EXTENSION_CHAR:     the executable has a delimiter that we want to stop at as part of argv[0].
 *
 * By default order doubles in the native (that is big/little endian) ordering. 
 */

#define HY_PLATFORM_DOUBLE_ORDER

/**
 * Provide some reasonable defaults for the VM types:
 * <ul>
 * <li><code>UDATA</code>        - unsigned data, can be used as an integer or 
 *                                 pointer storage</li>
 * <li><code>IDATA</code>        - signed data, can be used as an integer or 
 *                                 pointer storage</li>
 * <li><code>U_64 / I_64</code>  - unsigned/signed 64 bits</li>
 * <li><code>U_32 / I_32</code>  - unsigned/signed 32 bits</li>
 * <li><code>U_16 / I_16</code>  - unsigned/signed 16 bits</li>
 * <li><code>U_8 / I_8</code>    - unsigned/signed 8 bits (bytes -- not to be 
 *                                 confused with char)</li>
 * <li><code>BOOLEAN</code>      - something that can be zero or non-zero</li>
 * </ul>
 */
#if defined(LINUX) || defined(FREEBSD)
#if defined(_EM64T_) || defined(_IPF_)
typedef long int I_64;
typedef unsigned long int U_64;
#else
typedef long long I_64;
typedef unsigned long long U_64;
#endif

typedef double SYS_FLOAT;
#define HYCONST64(x) x##LL
#define NO_LVALUE_CASTING
#define FLOAT_EXTENDED  long double
#define PLATFORM_IS_ASCII
#define PLATFORM_LINE_DELIMITER "\012"
#define DIR_SEPARATOR '/'
#define DIR_SEPARATOR_STR "/"
/**
 * No priorities on Linux 
 */
#define HY_PRIORITY_MAP {0,0,0,0,0,0,0,0,0,0,0,0}
#else
typedef __int64 I_64;
typedef unsigned __int64 U_64;

typedef double SYS_FLOAT;
#define NO_LVALUE_CASTING
#define VMAPICALL _stdcall
#define VMCALL _cdecl
#define EXE_EXTENSION_CHAR  '.'

#define DIR_SEPARATOR '\\'
#define DIR_SEPARATOR_STR "\\"

#define HY_PRIORITY_MAP { \
  THREAD_PRIORITY_IDLE,             /* 0 */\
  THREAD_PRIORITY_LOWEST,           /* 1 */\
  THREAD_PRIORITY_BELOW_NORMAL,     /* 2 */\
  THREAD_PRIORITY_BELOW_NORMAL,     /* 3 */\
  THREAD_PRIORITY_BELOW_NORMAL,     /* 4 */\
  THREAD_PRIORITY_NORMAL,           /* 5 */\
  THREAD_PRIORITY_ABOVE_NORMAL,     /* 6 */\
  THREAD_PRIORITY_ABOVE_NORMAL,     /* 7 */\
  THREAD_PRIORITY_ABOVE_NORMAL,     /* 8 */\
  THREAD_PRIORITY_ABOVE_NORMAL,     /* 9 */\
  THREAD_PRIORITY_HIGHEST,          /*10 */\
  THREAD_PRIORITY_TIME_CRITICAL     /*11 */}
#endif

#ifdef POINTER64
typedef U_64 UDATA;        /* 64bits */
typedef unsigned int U_32;
typedef unsigned short U_16;
typedef unsigned char U_8;
typedef I_64 IDATA;  /* 64bits */
typedef signed int I_32;
typedef signed short I_16;
typedef signed char I_8;
#else
typedef unsigned int UDATA;
typedef unsigned int U_32;
typedef unsigned short U_16;
typedef unsigned char U_8;
typedef int IDATA;
typedef int I_32;
typedef short I_16;
typedef char I_8;
#endif

#define GLOBAL_DATA(symbol) ((void*)&(symbol))
#define GLOBAL_TABLE(symbol) GLOBAL_DATA(symbol)

#if !defined(VMCALL)
#define VMCALL
#define VMAPICALL
#endif
#define PVMCALL VMCALL *

#if defined(LINUX) || defined(FREEBSD)
    typedef U_32 BOOLEAN;
#elif defined(_WIN32)
#   if _MSC_VER >= 1300 || __INTEL_COMPILER
// <winsock2.h> must be included before <windows.h> to avoid 
// compile-time errors with winsock.h. For more details, see:
// http://www.microsoft.com/msdownload/platformsdk/sdkupdate/2600.2180.7/contents.htm
#       include <winsock2.h>
#   endif
#   include <windows.h>
#endif

#if !defined(HYCONST64)
#define HYCONST64(x) x##L
#endif

#if !defined(HY_DEFAULT_SCHED)

/**
 * By default, pthreads platforms use the <code>SCHED_OTHER</code> thread 
 * scheduling policy. 
 */

#define HY_DEFAULT_SCHED SCHED_OTHER
#endif

#if !defined(HY_PRIORITY_MAP)

/** 
 * If no priority map if provided, priorities will be determined 
 * algorithmically. 
 */

#endif


#if !defined(NULL)
#if defined(__cplusplus)
#define NULL    (0)
#else
#define NULL    ((void *)0)
#endif
#endif
#define USE_PROTOTYPES
#if defined(USE_PROTOTYPES)
#define PROTOTYPE(x)  x
#define VARARGS   , ...
#else
#define PROTOTYPE(x)  ()
#define VARARGS
#endif

/** 
 * Assign the default line delimiter, if it was not set. 
 */

#if !defined(PLATFORM_LINE_DELIMITER)
#define PLATFORM_LINE_DELIMITER "\015\012"
#endif

/**
 * Set the max path length, if it was not set. 
 */

#if !defined(MAX_IMAGE_PATH_LENGTH)
#define MAX_IMAGE_PATH_LENGTH (2048)
#endif
typedef double ESDOUBLE;
typedef float ESSINGLE;

/** 
 * Helpers for U_64s. 
 */

#define CLEAR_U64(u64)  (u64 = (U_64)0)
#define LOW_LONG(l) (*((U_32 *) &(l)))
#define HIGH_LONG(l)  (*(((U_32 *) &(l)) + 1))
//conflicts with many IPF-related names
//#define I8(x)       ((I_8) (x))
#define I8P(x)      ((I_8 *) (x))
#define U16(x)      ((U_16) (x))
#define I16(x)      ((I_16) (x))
#define I16P(x)     ((I_16 *) (x))
#define U32(x)      ((U_32) (x))
#define I32(x)      ((I_32) (x))
#define I32P(x)     ((I_32 *) (x))
#define U16P(x)     ((U_16 *) (x))
#define U32P(x)     ((U_32 *) (x))
#define OBJP(x)     ((HyObject *) (x))
#define OBJPP(x)    ((HyObject **) (x))
#define OBJPPP(x)   ((HyObject ***) (x))
#define CLASSP(x)   ((Class *) (x))
#define CLASSPP(x)  ((Class **) (x))
#define BYTEP(x)    ((BYTE *) (x))

/**
 * Test - was conflicting with OS2.h 
 */

#define ESCHAR(x)   ((CHARACTER) (x))
#define FLT(x)      ((FLOAT) x)
#define FLTP(x)     ((FLOAT *) (x))
#if defined(NO_LVALUE_CASTING)
#define LI8(x)      (*((I_8 *) &(x)))
#define LI8P(x)     (*((I_8 **) &(x)))
#define LU16(x)     (*((U_16 *) &(x)))
#define LI16(x)     (*((I_16 *) &(x)))
#define LU32(x)     (*((U_32 *) &(x)))
#define LI32(x)     (*((I_32 *) &(x)))
#define LI32P(x)    (*((I_32 **) &(x)))
#define LU16P(x)    (*((U_16 **) &(x)))
#define LU32P(x)    (*((U_32 **) &(x)))
#define LOBJP(x)    (*((HyObject **) &(x)))
#define LOBJPP(x)   (*((HyObject ***) &(x)))
#define LOBJPPP(x)  (*((HyObject ****) &(x))
#define LCLASSP(x)  (*((Class **) &(x)))
#define LBYTEP(x)   (*((BYTE **) &(x)))
#define LCHAR(x)    (*((CHARACTER) &(x)))
#define LFLT(x)     (*((FLOAT) &x))
#define LFLTP(x)    (*((FLOAT *) &(x)))
#else
#define LI8(x)      I8((x))
#define LI8P(x)     I8P((x))
#define LU16(x)     U16((x))
#define LI16(x)     I16((x))
#define LU32(x)     U32((x))
#define LI32(x)     I32((x))
#define LI32P(x)    I32P((x))
#define LU16P(x)    U16P((x))
#define LU32P(x)    U32P((x))
#define LOBJP(x)    OBJP((x))
#define LOBJPP(x)   OBJPP((x))
#define LOBJPPP(x)  OBJPPP((x))
#define LIOBJP(x)   IOBJP((x))
#define LCLASSP(x)  CLASSP((x))
#define LBYTEP(x)   BYTEP((x))
#define LCHAR(x)    CHAR((x))
#define LFLT(x)     FLT((x))
#define LFLTP(x)    FLTP((x))
#endif

/**
 * Macros for converting between words and longs and accessing bits. 
 */

#define HIGH_WORD(x)  U16(U32((x)) >> 16)
#define LOW_WORD(x)   U16(U32((x)) & 0xFFFF)
#define LOW_BIT(o)    (U32((o)) & 1)
#define LOW_2_BITS(o) (U32((o)) & 3)
#define LOW_3_BITS(o) (U32((o)) & 7)
#define LOW_4_BITS(o) (U32((o)) & 15)
#define MAKE_32(h, l) ((U32((h)) << 16) | U32((l)))
#define MAKE_64(h, l) ((((I_64)(h)) << 32) | (l))
#if defined(__cplusplus)
#define HY_CFUNC "C"
#define HY_CDATA "C"
#else
#define HY_CFUNC
#define HY_CDATA
#endif

/**
 * Macros for tagging functions which read/write the vm thread. 
 */

#define READSVMTHREAD
#define WRITESVMTHREAD
#define REQUIRESSTACKFRAME

/**
 * Macro for tagging functions, which never return. 
 */

#if defined(__GNUC__)

/** 
 * On GCC, we can actually pass this information on to the compiler. 
 */

#define NORETURN __attribute__((noreturn))
#else
#define NORETURN
#endif

/**
 * Macros for accessing I_64 values. 
 */

#if defined(ATOMIC_LONG_ACCESS)
#define PTR_LONG_STORE(dstPtr, aLongPtr) ((*U32P(dstPtr) = *U32P(aLongPtr)), (*(U32P(dstPtr)+1) = *(U32P(aLongPtr)+1)))
#define PTR_LONG_VALUE(dstPtr, aLongPtr) ((*U32P(aLongPtr) = *U32P(dstPtr)), (*(U32P(aLongPtr)+1) = *(U32P(dstPtr)+1)))
#else
#define PTR_LONG_STORE(dstPtr, aLongPtr) (*(dstPtr) = *(aLongPtr))
#define PTR_LONG_VALUE(dstPtr, aLongPtr) (*(aLongPtr) = *(dstPtr))
#endif

/** 
 * Macro used when declaring tables which require relocations.
 */

#if !defined(HYCONST_TABLE)
#define HYCONST_TABLE const
#endif

/**
 * ANSI qsort is not always available. 
 */

#if !defined(HY_SORT)
#define HY_SORT(base, nmemb, size, compare) qsort((base), (nmemb), (size), (compare))
#endif

#endif /* hycomp_h */