mirror of
https://github.com/gbdev/rgbds.git
synced 2025-11-20 18:22:07 +00:00
94fad97aed
Argh, that obnoxious platform again... ;-) Signed-off-by: Vegard Nossum <vegard.nossum@gmail.com>
546 lines
10 KiB
C
546 lines
10 KiB
C
/*
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* Here we have the routines that read an objectfile
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mylink.h"
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#include "main.h"
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struct sSymbol **tSymbols;
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struct sSection *pSections=NULL;
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struct sSection *pLibSections=NULL;
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UBYTE dummymem;
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BBOOL oReadLib=0;
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/*
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* The usual byte order stuff
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*
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*/
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SLONG readlong( FILE *f )
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{
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SLONG r;
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r =fgetc(f);
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r|=fgetc(f)<<8;
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r|=fgetc(f)<<16;
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r|=fgetc(f)<<24;
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return( r );
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}
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UWORD readword( FILE *f )
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{
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UWORD r;
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r =fgetc(f);
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r|=fgetc(f)<<8;
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return( r );
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}
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/*
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* Read a NULL terminated string from a file
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*
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*/
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SLONG readasciiz( char *s, FILE *f )
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{
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SLONG r=0;
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while( ((*s++)=fgetc(f))!=0 )
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r+=1;
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return( r+1 );
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}
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/*
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* Allocate a new section and link it into the list
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*
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*/
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struct sSection *AllocSection( void )
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{
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struct sSection **ppSections;
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if( oReadLib==1 )
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ppSections=&pLibSections;
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else
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ppSections=&pSections;
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while( *ppSections )
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ppSections=&((*ppSections)->pNext);
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if( (*ppSections)=(struct sSection *)malloc(sizeof(struct sSection)) )
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{
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(*ppSections)->tSymbols=tSymbols;
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(*ppSections)->pNext=NULL;
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(*ppSections)->pPatches=NULL;
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(*ppSections)->oAssigned=0;
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return( *ppSections );
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}
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else
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{
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fatalerror( "Out of memory!" );
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return( NULL );
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}
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}
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/*
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* Read a symbol from a file
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*
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*/
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struct sSymbol *obj_ReadSymbol( FILE *f )
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{
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char s[256];
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struct sSymbol *pSym;
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if( pSym=(struct sSymbol *)malloc(sizeof(struct sSymbol)) )
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{
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readasciiz( s, f );
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if( pSym->pzName=(char *)malloc(strlen(s)+1) )
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{
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strcpy( pSym->pzName, s );
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if( (pSym->Type=(enum eSymbolType)fgetc(f))!=SYM_IMPORT )
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{
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pSym->nSectionID=readlong(f);
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pSym->nOffset=readlong(f);
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}
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return( pSym );
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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fatalerror( "Out of memory!" );
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return( NULL );
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}
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/*
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* RGB0 object reader routines
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*
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*/
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struct sSection *obj_ReadRGB0Section( FILE *f )
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{
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struct sSection *pSection;
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pSection=AllocSection();
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pSection->nByteSize=readlong( f );
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pSection->Type=(enum eSectionType)fgetc( f );
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pSection->nOrg=-1;
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pSection->nBank=-1;
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/* does the user want the -s mode? */
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if( (options&OPT_SMALL) && (pSection->Type==SECT_CODE) )
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{
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pSection->Type=SECT_HOME;
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}
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if( (pSection->Type==SECT_CODE) || (pSection->Type==SECT_HOME) )
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{
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/*
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* These sectiontypes contain data...
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*
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*/
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if( pSection->nByteSize )
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{
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if( pSection->pData=(UBYTE *)malloc(pSection->nByteSize) )
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{
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SLONG nNumberOfPatches;
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struct sPatch **ppPatch, *pPatch;
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char s[256];
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fread( pSection->pData, sizeof(UBYTE), pSection->nByteSize, f );
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nNumberOfPatches=readlong(f);
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ppPatch=&pSection->pPatches;
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/*
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* And patches...
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*
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*/
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while( nNumberOfPatches-- )
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{
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if( pPatch=(struct sPatch *)malloc(sizeof(struct sPatch)) )
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{
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*ppPatch=pPatch;
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readasciiz( s, f );
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if( pPatch->pzFilename=(char *)malloc(strlen(s)+1) )
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{
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strcpy( pPatch->pzFilename, s );
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pPatch->nLineNo=readlong( f );
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pPatch->nOffset=readlong( f );
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pPatch->Type=(enum ePatchType)fgetc( f );
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if( (pPatch->nRPNSize=readlong(f))>0 )
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{
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if( pPatch->pRPN=(UBYTE *)malloc(pPatch->nRPNSize) )
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fread( pPatch->pRPN, sizeof(UBYTE), pPatch->nRPNSize, f );
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else
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fatalerror( "Out of memory!" );
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}
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else
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pPatch->pRPN=NULL;
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pPatch->pNext=NULL;
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ppPatch=&(pPatch->pNext);
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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fatalerror( "Out of memory!" );
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}
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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{
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readlong(f); // Skip number of patches
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pSection->pData=&dummymem;
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}
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}
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return( pSection );
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}
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void obj_ReadRGB0( FILE *pObjfile )
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{
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struct sSection *pFirstSection;
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SLONG nNumberOfSymbols, nNumberOfSections, i;
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nNumberOfSymbols=readlong( pObjfile );
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nNumberOfSections=readlong( pObjfile );
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/* First comes the symbols */
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if( nNumberOfSymbols )
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{
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if( tSymbols=(struct sSymbol **)malloc(nNumberOfSymbols*sizeof(struct sSymbol *)) )
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{
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for( i=0; i<nNumberOfSymbols; i+=1 )
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tSymbols[i]=obj_ReadSymbol( pObjfile );
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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tSymbols=(struct sSymbol **)&dummymem;
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/* Next we have the sections */
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pFirstSection=NULL;
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while( nNumberOfSections-- )
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{
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struct sSection *pNewSection;
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pNewSection=obj_ReadRGB0Section( pObjfile );
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pNewSection->nNumberOfSymbols=nNumberOfSymbols;
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if( pFirstSection==NULL )
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pFirstSection=pNewSection;
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}
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/*
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* Fill in the pSection entry in the symbolstructure.
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* This REALLY needs some cleaning up... but, hey, it works
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*
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*/
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for( i=0; i<nNumberOfSymbols; i+=1 )
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{
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struct sSection *pConvSect=pFirstSection;
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if( tSymbols[i]->Type!=SYM_IMPORT && tSymbols[i]->nSectionID!=-1 )
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{
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SLONG j=0;
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while( j != tSymbols[i]->nSectionID )
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{
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j+=1;
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pConvSect=pConvSect->pNext;
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}
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tSymbols[i]->pSection=pConvSect;
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}
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else
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tSymbols[i]->pSection=NULL;
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}
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}
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/*
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* RGB1 object reader routines
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*
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*/
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struct sSection *obj_ReadRGB1Section( FILE *f )
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{
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struct sSection *pSection;
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pSection=AllocSection();
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pSection->nByteSize=readlong( f );
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pSection->Type=(enum eSectionType)fgetc( f );
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/*
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* And because of THIS new feature I'll have to rewrite loads and
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* loads of stuff... oh well it needed to be done anyway
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*
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*/
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pSection->nOrg=readlong( f );
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pSection->nBank=readlong( f );
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/* does the user want the -s mode? */
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if( (options&OPT_SMALL) && (pSection->Type==SECT_CODE) )
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{
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pSection->Type=SECT_HOME;
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}
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if( (pSection->Type==SECT_CODE) || (pSection->Type==SECT_HOME) )
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{
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/*
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* These sectiontypes contain data...
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*
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*/
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if( pSection->nByteSize )
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{
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if( pSection->pData=(UBYTE *)malloc(pSection->nByteSize) )
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{
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SLONG nNumberOfPatches;
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struct sPatch **ppPatch, *pPatch;
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char s[256];
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fread( pSection->pData, sizeof(UBYTE), pSection->nByteSize, f );
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nNumberOfPatches=readlong(f);
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ppPatch=&pSection->pPatches;
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/*
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* And patches...
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*
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*/
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while( nNumberOfPatches-- )
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{
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if( pPatch=(struct sPatch *)malloc(sizeof(struct sPatch)) )
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{
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*ppPatch=pPatch;
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readasciiz( s, f );
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if( pPatch->pzFilename=(char *)malloc(strlen(s)+1) )
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{
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strcpy( pPatch->pzFilename, s );
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pPatch->nLineNo=readlong( f );
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pPatch->nOffset=readlong( f );
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pPatch->Type=(enum ePatchType)fgetc( f );
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if( (pPatch->nRPNSize=readlong(f))>0 )
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{
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if( pPatch->pRPN=(UBYTE *)malloc(pPatch->nRPNSize) )
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fread( pPatch->pRPN, sizeof(UBYTE), pPatch->nRPNSize, f );
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else
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fatalerror( "Out of memory!" );
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}
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else
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pPatch->pRPN=NULL;
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pPatch->pNext=NULL;
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ppPatch=&(pPatch->pNext);
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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fatalerror( "Out of memory!" );
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}
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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{
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readlong(f); // Skip number of patches
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pSection->pData=&dummymem;
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}
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}
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return( pSection );
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}
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void obj_ReadRGB1( FILE *pObjfile )
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{
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struct sSection *pFirstSection;
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SLONG nNumberOfSymbols, nNumberOfSections, i;
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nNumberOfSymbols=readlong( pObjfile );
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nNumberOfSections=readlong( pObjfile );
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/* First comes the symbols */
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if( nNumberOfSymbols )
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{
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if( tSymbols=(struct sSymbol **)malloc(nNumberOfSymbols*sizeof(struct sSymbol *)) )
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{
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for( i=0; i<nNumberOfSymbols; i+=1 )
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tSymbols[i]=obj_ReadSymbol( pObjfile );
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}
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else
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fatalerror( "Out of memory!" );
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}
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else
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tSymbols=(struct sSymbol **)&dummymem;
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/* Next we have the sections */
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pFirstSection=NULL;
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while( nNumberOfSections-- )
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{
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struct sSection *pNewSection;
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pNewSection=obj_ReadRGB1Section( pObjfile );
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pNewSection->nNumberOfSymbols=nNumberOfSymbols;
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if( pFirstSection==NULL )
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pFirstSection=pNewSection;
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}
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/*
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* Fill in the pSection entry in the symbolstructure.
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* This REALLY needs some cleaning up... but, hey, it works
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*
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*/
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for( i=0; i<nNumberOfSymbols; i+=1 )
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{
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struct sSection *pConvSect=pFirstSection;
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if( tSymbols[i]->Type!=SYM_IMPORT && tSymbols[i]->nSectionID!=-1 )
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{
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SLONG j=0;
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while( j != tSymbols[i]->nSectionID )
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{
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j+=1;
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pConvSect=pConvSect->pNext;
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}
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tSymbols[i]->pSection=pConvSect;
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}
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else
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tSymbols[i]->pSection=NULL;
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}
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}
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/*
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* The main objectfileloadroutine (phew)
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*
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*/
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void obj_ReadOpenFile( FILE *pObjfile, char *tzObjectfile )
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{
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char tzHeader[8];
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fread( tzHeader, sizeof(char), 4, pObjfile );
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tzHeader[4]=0;
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if( strncmp(tzHeader,"RGB", 3)==0 )
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{
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switch( tzHeader[3] )
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{
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case '0':
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obj_ReadRGB0( pObjfile );
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break;
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case '1':
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case '2': // V2 is really the same but the are new patch types
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obj_ReadRGB1( pObjfile );
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break;
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default:
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sprintf( temptext, "'%s' is an unsupported version\n", tzObjectfile );
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fatalerror( temptext );
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break;
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}
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}
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else
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{
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sprintf( temptext, "'%s' is not a valid object\n", tzObjectfile );
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fatalerror( temptext );
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}
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}
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void obj_Readfile( char *tzObjectfile )
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{
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FILE *pObjfile;
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if( options&OPT_SMART_C_LINK )
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oReadLib=1;
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else
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oReadLib=0;
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if( pObjfile=fopen(tzObjectfile,"rb") )
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{
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obj_ReadOpenFile( pObjfile, tzObjectfile );
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fclose( pObjfile );
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}
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else
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{
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sprintf( temptext, "Unable to open '%s'\n", tzObjectfile );
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fatalerror( temptext );
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}
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oReadLib=0;
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}
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SLONG file_Length( FILE *f )
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{
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ULONG r,
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p;
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p=ftell( f );
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fseek( f, 0, SEEK_END );
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r=ftell( f );
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fseek( f, p, SEEK_SET );
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return( r );
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}
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void lib_ReadXLB0( FILE *f )
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{
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SLONG size;
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size=file_Length( f )-4;
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while( size )
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{
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char name[256];
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size-=readasciiz( name, f );
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readword( f ); size-=2;
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readword( f ); size-=2;
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size-=readlong( f ); size-=4;
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obj_ReadOpenFile( f, name );
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}
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}
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void lib_Readfile( char *tzLibfile )
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{
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FILE *pObjfile;
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oReadLib=1;
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if( pObjfile=fopen(tzLibfile,"rb") )
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{
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char tzHeader[5];
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fread( tzHeader, sizeof(char), 4, pObjfile );
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tzHeader[4]=0;
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if( strcmp(tzHeader,"XLB0")==0 )
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lib_ReadXLB0( pObjfile );
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else
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{
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sprintf( temptext, "'%s' is an invalid library\n", tzLibfile );
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fatalerror( temptext );
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}
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fclose( pObjfile );
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}
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else
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{
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sprintf( temptext, "Unable to open '%s'\n", tzLibfile );
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fatalerror( temptext );
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}
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} |