/*
 * "The Road goes ever on and on, down from the door where it began."
 */


#include "EXTERN.h"
#include "perl.h"

#ifdef PERL_OBJECT
#define NO_XSLOCKS
#endif

#include "XSUB.h"

#ifdef PERL_IMPLICIT_SYS
#include "win32iop.h"
#include <fcntl.h>
#endif /* PERL_IMPLICIT_SYS */


/* Register any extra external extensions */
char *staticlinkmodules[] = {
    "DynaLoader",
    NULL,
};

EXTERN_C void boot_DynaLoader (pTHXo_ CV* cv);

static void
xs_init(pTHXo)
{
    char *file = __FILE__;
    dXSUB_SYS;
    newXS("DynaLoader::boot_DynaLoader", boot_DynaLoader, file);
}

#ifdef PERL_IMPLICIT_SYS

#include "perlhost.h"

EXTERN_C void
perl_get_host_info(struct IPerlMemInfo* perlMemInfo,
		   struct IPerlMemInfo* perlMemSharedInfo,
		   struct IPerlMemInfo* perlMemParseInfo,
		   struct IPerlEnvInfo* perlEnvInfo,
		   struct IPerlStdIOInfo* perlStdIOInfo,
		   struct IPerlLIOInfo* perlLIOInfo,
		   struct IPerlDirInfo* perlDirInfo,
		   struct IPerlSockInfo* perlSockInfo,
		   struct IPerlProcInfo* perlProcInfo)
{
    if (perlMemInfo) {
	Copy(&perlMem, &perlMemInfo->perlMemList, perlMemInfo->nCount, void*);
	perlMemInfo->nCount = (sizeof(struct IPerlMem)/sizeof(void*));
    }
    if (perlMemSharedInfo) {
	Copy(&perlMem, &perlMemSharedInfo->perlMemList, perlMemSharedInfo->nCount, void*);
	perlMemSharedInfo->nCount = (sizeof(struct IPerlMem)/sizeof(void*));
    }
    if (perlMemParseInfo) {
	Copy(&perlMem, &perlMemParseInfo->perlMemList, perlMemParseInfo->nCount, void*);
	perlMemParseInfo->nCount = (sizeof(struct IPerlMem)/sizeof(void*));
    }
    if (perlEnvInfo) {
	Copy(&perlEnv, &perlEnvInfo->perlEnvList, perlEnvInfo->nCount, void*);
	perlEnvInfo->nCount = (sizeof(struct IPerlEnv)/sizeof(void*));
    }
    if (perlStdIOInfo) {
	Copy(&perlStdIO, &perlStdIOInfo->perlStdIOList, perlStdIOInfo->nCount, void*);
	perlStdIOInfo->nCount = (sizeof(struct IPerlStdIO)/sizeof(void*));
    }
    if (perlLIOInfo) {
	Copy(&perlLIO, &perlLIOInfo->perlLIOList, perlLIOInfo->nCount, void*);
	perlLIOInfo->nCount = (sizeof(struct IPerlLIO)/sizeof(void*));
    }
    if (perlDirInfo) {
	Copy(&perlDir, &perlDirInfo->perlDirList, perlDirInfo->nCount, void*);
	perlDirInfo->nCount = (sizeof(struct IPerlDir)/sizeof(void*));
    }
    if (perlSockInfo) {
	Copy(&perlSock, &perlSockInfo->perlSockList, perlSockInfo->nCount, void*);
	perlSockInfo->nCount = (sizeof(struct IPerlSock)/sizeof(void*));
    }
    if (perlProcInfo) {
	Copy(&perlProc, &perlProcInfo->perlProcList, perlProcInfo->nCount, void*);
	perlProcInfo->nCount = (sizeof(struct IPerlProc)/sizeof(void*));
    }
}

EXTERN_C PerlInterpreter*
perl_alloc_override(struct IPerlMem** ppMem, struct IPerlMem** ppMemShared,
		 struct IPerlMem** ppMemParse, struct IPerlEnv** ppEnv,
		 struct IPerlStdIO** ppStdIO, struct IPerlLIO** ppLIO,
		 struct IPerlDir** ppDir, struct IPerlSock** ppSock,
		 struct IPerlProc** ppProc)
{
    PerlInterpreter *my_perl = NULL;
    CPerlHost* pHost = new CPerlHost(ppMem, ppMemShared, ppMemParse, ppEnv,
				     ppStdIO, ppLIO, ppDir, ppSock, ppProc);

    if (pHost) {
	my_perl = perl_alloc_using(pHost->m_pHostperlMem,
				   pHost->m_pHostperlMemShared,
				   pHost->m_pHostperlMemParse,
				   pHost->m_pHostperlEnv,
				   pHost->m_pHostperlStdIO,
				   pHost->m_pHostperlLIO,
				   pHost->m_pHostperlDir,
				   pHost->m_pHostperlSock,
				   pHost->m_pHostperlProc);
	if (my_perl) {
#ifdef PERL_OBJECT
	    CPerlObj* pPerl = (CPerlObj*)my_perl;
#endif
	    w32_internal_host = pHost;
	}
    }
    return my_perl;
}

EXTERN_C PerlInterpreter*
perl_alloc(void)
{
    PerlInterpreter* my_perl = NULL;
    CPerlHost* pHost = new CPerlHost();
    if (pHost) {
	my_perl = perl_alloc_using(pHost->m_pHostperlMem,
				   pHost->m_pHostperlMemShared,
				   pHost->m_pHostperlMemParse,
				   pHost->m_pHostperlEnv,
				   pHost->m_pHostperlStdIO,
				   pHost->m_pHostperlLIO,
				   pHost->m_pHostperlDir,
				   pHost->m_pHostperlSock,
				   pHost->m_pHostperlProc);
	if (my_perl) {
#ifdef PERL_OBJECT
	    CPerlObj* pPerl = (CPerlObj*)my_perl;
#endif
	    w32_internal_host = pHost;
	}
    }
    return my_perl;
}

#ifdef PERL_OBJECT

EXTERN_C void
perl_construct(PerlInterpreter* my_perl)
{
    CPerlObj* pPerl = (CPerlObj*)my_perl;
    try
    {
	Perl_construct();
    }
    catch(...)
    {
	win32_fprintf(stderr, "%s\n",
		      "Error: Unable to construct data structures");
	CPerlHost* pHost = (CPerlHost*)w32_internal_host;
	Perl_free();
	delete pHost;
	SetPerlInterpreter(NULL);
    }
}

EXTERN_C void
perl_destruct(PerlInterpreter* my_perl)
{
    CPerlObj* pPerl = (CPerlObj*)my_perl;
#ifdef DEBUGGING
    Perl_destruct();
#else
    try
    {
	Perl_destruct();
    }
    catch(...)
    {
    }
#endif
}

EXTERN_C void
perl_free(PerlInterpreter* my_perl)
{
    CPerlObj* pPerl = (CPerlObj*)my_perl;
#ifdef DEBUGGING
    CPerlHost* pHost = (CPerlHost*)w32_internal_host;
    Perl_free();
    delete pHost;
#else
    try
    {
	CPerlHost* pHost = (CPerlHost*)w32_internal_host;
	Perl_free();
	delete pHost;
    }
    catch(...)
    {
    }
#endif
    SetPerlInterpreter(NULL);
}

EXTERN_C int
perl_run(PerlInterpreter* my_perl)
{
    CPerlObj* pPerl = (CPerlObj*)my_perl;
#ifdef DEBUGGING
    return Perl_run();
#else
    int retVal;
    try
    {
	retVal = Perl_run();
    }
    catch(...)
    {
	win32_fprintf(stderr, "Error: Runtime exception\n");
	retVal = -1;
    }
    return retVal;
#endif
}

EXTERN_C int
perl_parse(PerlInterpreter* my_perl, void (*xsinit)(CPerlObj*), int argc, char** argv, char** env)
{
    int retVal;
    CPerlObj* pPerl = (CPerlObj*)my_perl;
#ifdef DEBUGGING
    retVal = Perl_parse(xsinit, argc, argv, env);
#else
    try
    {
	retVal = Perl_parse(xsinit, argc, argv, env);
    }
    catch(...)
    {
	win32_fprintf(stderr, "Error: Parse exception\n");
	retVal = -1;
    }
#endif
    *win32_errno() = 0;
    return retVal;
}

#undef PL_perl_destruct_level
#define PL_perl_destruct_level int dummy

#endif /* PERL_OBJECT */
#endif /* PERL_IMPLICIT_SYS */

EXTERN_C HANDLE w32_perldll_handle;

static DWORD g_TlsAllocIndex;

EXTERN_C DllExport bool
SetPerlInterpreter(void *interp)
{
    return TlsSetValue(g_TlsAllocIndex, interp);
}

EXTERN_C DllExport void*
GetPerlInterpreter(void)
{
    return TlsGetValue(g_TlsAllocIndex);
}

EXTERN_C DllExport int
RunPerl(int argc, char **argv, char **env)
{
    int exitstatus;
    PerlInterpreter *my_perl, *new_perl = NULL;
    struct perl_thread *thr;

#ifndef __BORLANDC__
    /* XXX this _may_ be a problem on some compilers (e.g. Borland) that
     * want to free() argv after main() returns.  As luck would have it,
     * Borland's CRT does the right thing to argv[0] already. */
    char szModuleName[MAX_PATH];
    char *ptr;

    GetModuleFileName(NULL, szModuleName, sizeof(szModuleName));
    (void)win32_longpath(szModuleName);
    argv[0] = szModuleName;
#endif

#ifdef PERL_GLOBAL_STRUCT
#define PERLVAR(var,type) /**/
#define PERLVARA(var,type) /**/
#define PERLVARI(var,type,init) PL_Vars.var = init;
#define PERLVARIC(var,type,init) PL_Vars.var = init;
#include "perlvars.h"
#undef PERLVAR
#undef PERLVARA
#undef PERLVARI
#undef PERLVARIC
#endif

    PERL_SYS_INIT(&argc,&argv);

    if (!(my_perl = perl_alloc()))
	return (1);
    perl_construct( my_perl );
    PL_perl_destruct_level = 0;

    exitstatus = perl_parse(my_perl, xs_init, argc, argv, env);
    if (!exitstatus) {
#if defined(TOP_CLONE) && defined(USE_ITHREADS)		/* XXXXXX testing */
#  ifdef PERL_OBJECT
	CPerlHost *h = new CPerlHost();
	new_perl = perl_clone_using(my_perl, 1,
				    h->m_pHostperlMem,
				    h->m_pHostperlMemShared,
				    h->m_pHostperlMemParse,
				    h->m_pHostperlEnv,
				    h->m_pHostperlStdIO,
				    h->m_pHostperlLIO,
				    h->m_pHostperlDir,
				    h->m_pHostperlSock,
				    h->m_pHostperlProc
				    );
	CPerlObj *pPerl = (CPerlObj*)new_perl;
#  else
	new_perl = perl_clone(my_perl, 1);
#  endif
	exitstatus = perl_run( new_perl );
	SetPerlInterpreter(my_perl);
#else
	exitstatus = perl_run( my_perl );
#endif
    }

    perl_destruct( my_perl );
    perl_free( my_perl );
#ifdef USE_ITHREADS
    if (new_perl) {
	SetPerlInterpreter(new_perl);
	perl_destruct(new_perl);
	perl_free(new_perl);
    }
#endif

    PERL_SYS_TERM();

    return (exitstatus);
}

BOOL APIENTRY
DllMain(HANDLE hModule,		/* DLL module handle */
	DWORD fdwReason,	/* reason called */
	LPVOID lpvReserved)	/* reserved */
{ 
    switch (fdwReason) {
	/* The DLL is attaching to a process due to process
	 * initialization or a call to LoadLibrary.
	 */
    case DLL_PROCESS_ATTACH:
/* #define DEFAULT_BINMODE */
#ifdef DEFAULT_BINMODE
	setmode( fileno( stdin  ), O_BINARY );
	setmode( fileno( stdout ), O_BINARY );
	setmode( fileno( stderr ), O_BINARY );
	_fmode = O_BINARY;
#endif
	g_TlsAllocIndex = TlsAlloc();
	DisableThreadLibraryCalls((HMODULE)hModule);
	w32_perldll_handle = hModule;
	break;

	/* The DLL is detaching from a process due to
	 * process termination or call to FreeLibrary.
	 */
    case DLL_PROCESS_DETACH:
	TlsFree(g_TlsAllocIndex);
	break;

	/* The attached process creates a new thread. */
    case DLL_THREAD_ATTACH:
	break;

	/* The thread of the attached process terminates. */
    case DLL_THREAD_DETACH:
	break;

    default:
	break;
    }
    return TRUE;
}