/*

Copyright (c) 2014 <>< Charles Lohr

All rights reserved.

Redistribution and use in source and binary forms, with or without

modification, are permitted provided that the following conditions are met:

* Redistributions of source code must retain the above copyright

notice, this list of conditions and the following disclaimer.

* Redistributions in binary form must reproduce the above copyright

notice, this list of conditions and the following disclaimer in the

documentation and/or other materials provided with the distribution.

* Neither the name of the <organization> nor the

names of its contributors may be used to endorse or promote products

derived from this software without specific prior written permission.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY

DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES

(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;

LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND

ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS

SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/

#include "tccengine.h"

#include "tcc/libtcc.h"

#include "os_generic.h"

#include <string.h>

#include <stdio.h>

#include <stdlib.h>

TCCEngine * TCCECreate( const char * tccfile, PopulateTCCEFunction popfn )

{

TCCEngine * ret = malloc( sizeof( TCCEngine ) );

memset( ret, 0, sizeof( TCCEngine ) );

ret->filename = strdup( tccfile );

ret->popfn = popfn;

TCCECheck( ret );

return ret;

}

int TCCECheck( TCCEngine * tce )

{

int r;

/*

char * program;

int ifl;

FILE * f = fopen( tce->filename, "rb" );

if( !f || ferror( f ) )

{

if( f ) fclose( f );

fprintf( stderr, "Error: Cannot open TCC Tool on file: \"%s\"\n", tce->filename );

return;

}

fseek( f, 0, SEEK_END );

ifl = ftell( f );

fseek( f, 0, SEEK_SET );

program = malloc( ifl 1 );

int r = fread( program, ifl, 1, f );

program[ifl] = 0;

fclose( f );

if( r < 0 )

{

fprintf( stderr, "Error: File I/O Error on file: \"%s\"\n", tce->filename );

free( program );

return;

}*/

double readtime = OGGetFileTime( tce->filename );

if( tce->readtime == readtime )

{

return 0;

}

tce->readtime = readtime;

TCCState * backuptcc = tce->state;

tce->state = tcc_new();

tcc_set_output_type(tce->state, TCC_OUTPUT_MEMORY);

tce->popfn( tce ); //Populate everything.

tcc_add_library( tce->state, "m" );

tcc_add_include_path( tce->state, ".." );

tcc_add_include_path( tce->state, "." );

r = tcc_add_file( tce->state, tce->filename );

if( r )

{

fprintf( stderr, "TCC Comple Status: %d\n", r );

goto end_err;

}

#if __WORDSIZE == 64

tcc_add_file(tce->state, "tcc/libtcc1-x86_64.a");

#else

//#error No TCC Defined for this architecture.

#endif

r = tcc_relocate(tce->state, NULL);

if (r == -1)

{

fprintf( stderr, "TCC Reallocation error." );

goto end_err;

}

//Issue stop

if( tce->stop )

{

printf( "Stopping...\n" );

tce->stop( tce->id );

printf( "Stop done.\n" );

}

if( backuptcc )

tcc_delete( backuptcc );

if( tce->image ) free( tce->image );

tce->image = malloc(r);

tcc_relocate( tce->state, tce->image );

tce->stop = (TCELinkage)tcc_get_symbol(tce->state, "stop" );

tce->start = (TCELinkage)tcc_get_symbol(tce->state, "start" );

tce->start( tce->id );

tce->collision = (TCELinkage)tcc_get_symbol(tce->state, "collision" );

return 1;

end_err:

tcc_delete( tce->state );

tce->state = backuptcc;

return -1;

}

void TCCEDestroy( TCCEngine * tce )

{

tcc_delete( tce->state );

free( tce->image );

free( tce );

}

void * TCCEGetSym( TCCEngine * tce, const char * symname )

{

return tcc_get_symbol(tce->state, symname );

}

void TCCESetSym( TCCEngine * tce, const char * symname, void * sym )

{

tcc_add_symbol( tce->state, symname, sym );

}