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Big endian support for BSP loader #1466

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Big endian support for BSP loader #1466

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b4f5d30
Big endian support in TexInfo loader
Xav101 May 18, 1998
23e1c00
Minimal patch to wad loader to get the server to start.
Xav101 Apr 16, 2023
63e8006
Big endian support for BSP v30 headers
Xav101 Jan 9, 2002
d3e028a
Big endian support in planes loader
Xav101 Apr 23, 2023
afddc89
Big endian support in submodel loader
Xav101 Apr 23, 2023
b421591
Big endian support for vertex and texture loaders
Xav101 Apr 23, 2023
8d6ff81
Minor endian swap changes
Xav101 Oct 16, 2023
eebd914
Merge branch 'master' of https://github.com/FWGS/xash3d-fwgs into iri…
Xav101 Oct 16, 2023
255cd36
isnan fix for when using GCC on IRIX
Xav101 Oct 20, 2000
8ce95fc
Big endian support for face surface loader. Mostly working I think?
Xav101 Oct 22, 2023
6a33b66
Big endian support for marksurfaces loader
Xav101 Oct 22, 2023
15f2376
Big endian support for leaves loader
Xav101 Oct 22, 2023
3767989
Big endian support for nodes loader
Xav101 Oct 22, 2023
ea0a59f
Big endian support for clipnodes loader. Server now starts on big end…
Xav101 Oct 22, 2023
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128 changes: 83 additions & 45 deletions engine/common/mod_bmodel.c
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Original file line number Diff line number Diff line change
Expand Up @@ -226,7 +226,7 @@ static mip_t *Mod_GetMipTexForTexture( dbspmodel_t *bmod, int i )
if( bmod->textures->dataofs[i] == -1 )
return NULL;

return (mip_t *)((byte *)bmod->textures + bmod->textures->dataofs[i] );
return (mip_t *)((byte *)bmod->textures + LittleLong( bmod->textures->dataofs[i] ));
}

// Returns index of WAD that texture was found in, or -1 if not found.
Expand Down Expand Up @@ -1711,6 +1711,9 @@ static void Mod_LoadSubmodels( dbspmodel_t *bmod )
{
for( j = 0; j < 3; j++ )
{
in->mins[j] = LittleFloat( in->mins[j] );
in->maxs[j] = LittleFloat( in->maxs[j] );

// reset empty bounds to prevent error
if( in->mins[j] == 999999.0f )
in->mins[j] = 0.0f;
Expand All @@ -1720,15 +1723,15 @@ static void Mod_LoadSubmodels( dbspmodel_t *bmod )
// spread the mins / maxs by a unit
out->mins[j] = in->mins[j] - 1.0f;
out->maxs[j] = in->maxs[j] + 1.0f;
out->origin[j] = in->origin[j];
out->origin[j] = LittleFloat( in->origin[j] );
}

for( j = 0; j < MAX_MAP_HULLS; j++ )
out->headnode[j] = in->headnode[j];
out->headnode[j] = LittleLong( in->headnode[j] );

out->visleafs = in->visleafs;
out->firstface = in->firstface;
out->numfaces = in->numfaces;
out->visleafs = LittleLong( in->visleafs );
out->firstface = LittleLong( in->firstface );
out->numfaces = LittleLong( in->numfaces );

if( i == 0 && bmod->isworld )
continue; // skip the world to save mem
Expand Down Expand Up @@ -1878,7 +1881,7 @@ static void Mod_LoadPlanes( dbspmodel_t *bmod )
out->signbits = 0;
for( j = 0; j < 3; j++ )
{
out->normal[j] = in->normal[j];
out->normal[j] = LittleFloat( in->normal[j] );

if( out->normal[j] < 0.0f )
SetBits( out->signbits, BIT( j ));
Expand All @@ -1887,8 +1890,8 @@ static void Mod_LoadPlanes( dbspmodel_t *bmod )
if( VectorLength( out->normal ) < 0.5f )
Con_Printf( S_ERROR "bad normal for plane #%i\n", i );

out->dist = in->dist;
out->type = in->type;
out->dist = LittleFloat( in->dist );
out->type = LittleLong (in->type );
}
}

Expand All @@ -1901,7 +1904,7 @@ static void Mod_LoadVertexes( dbspmodel_t *bmod )
{
dvertex_t *in;
mvertex_t *out;
int i;
int i, j;

in = bmod->vertexes;
out = loadmodel->vertexes = Mem_Malloc( loadmodel->mempool, bmod->numvertexes * sizeof( mvertex_t ));
Expand All @@ -1913,7 +1916,15 @@ static void Mod_LoadVertexes( dbspmodel_t *bmod )
{
if( bmod->isworld )
AddPointToBounds( in->point, world.mins, world.maxs );
#ifdef XASH_BIG_ENDIAN
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You may completely remove this check. Compiler will optimize out a loop that does nothing on little endian.

Also, if you didn't know, platform macros are defined into positive values in build.h, so they can be checked with just #if and used in complex expressions without defined() usage.

for( int j = 0; j < 3; j++ )
{

out->position[j] = LittleFloat( in->point[j] );
}
#elif
VectorCopy( in->point, out->position );
#endif
}

if( !bmod->isworld ) return;
Expand Down Expand Up @@ -1947,8 +1958,8 @@ static void Mod_LoadEdges( dbspmodel_t *bmod )

for( i = 0; i < bmod->numedges; i++, in++, out++ )
{
out->v[0] = in->v[0];
out->v[1] = in->v[1];
out->v[0] = LittleLong( in->v[0] );
out->v[1] = LittleLong( in->v[1] );
}
}
else
Expand All @@ -1957,8 +1968,8 @@ static void Mod_LoadEdges( dbspmodel_t *bmod )

for( i = 0; i < bmod->numedges; i++, in++, out++ )
{
out->v[0] = (word)in->v[0];
out->v[1] = (word)in->v[1];
out->v[0] = LittleShort( (word)in->v[0] );
out->v[1] = LittleShort( (word)in->v[1] );
}
}
}
Expand All @@ -1972,6 +1983,12 @@ static void Mod_LoadSurfEdges( dbspmodel_t *bmod )
{
loadmodel->surfedges = Mem_Malloc( loadmodel->mempool, bmod->numsurfedges * sizeof( dsurfedge_t ));
memcpy( loadmodel->surfedges, bmod->surfedges, bmod->numsurfedges * sizeof( dsurfedge_t ));
#ifdef XASH_BIG_ENDIAN
for( int i = 0; i < bmod->numsurfedges; i++ )
{
LittleLongSW( loadmodel->surfedges[i] );
}
#endif
loadmodel->numsurfedges = bmod->numsurfedges;
}

Expand Down Expand Up @@ -2005,9 +2022,9 @@ static void Mod_LoadMarkSurfaces( dbspmodel_t *bmod )

for( i = 0; i < bmod->nummarkfaces; i++, in++ )
{
if( *in < 0 || *in >= loadmodel->numsurfaces )
if( LittleShort( *in ) < 0 || LittleShort( *in ) >= loadmodel->numsurfaces )
Host_Error( "Mod_LoadMarkFaces: bad surface number in '%s'\n", loadmodel->name );
out[i] = loadmodel->surfaces + *in;
out[i] = loadmodel->surfaces + LittleShort( *in );
}
}
}
Expand Down Expand Up @@ -2147,8 +2164,8 @@ static void Mod_LoadTexture( dbspmodel_t *bmod, int textureIndex )
// Ensure texture name is lowercase.
Q_strnlwr( mipTex->name, texture->name, sizeof( texture->name ));

texture->width = mipTex->width;
texture->height = mipTex->height;
texture->width = LittleLong( mipTex->width );
texture->height = LittleLong( mipTex->height );

Mod_LoadTextureData( bmod, textureIndex );
}
Expand Down Expand Up @@ -2314,6 +2331,7 @@ static void Mod_LoadTextures( dbspmodel_t *bmod )
#endif

lump = bmod->textures;
LittleLongSW( lump->nummiptex );

if( bmod->texdatasize < 1 || !lump || lump->nummiptex < 1 )
{
Expand Down Expand Up @@ -2362,9 +2380,9 @@ static void Mod_LoadTexInfo( dbspmodel_t *bmod )
{
for( j = 0; j < 2; j++ )
for( k = 0; k < 4; k++ )
out->vecs[j][k] = in->vecs[j][k];
out->vecs[j][k] = LittleFloat( in->vecs[j][k] );

miptex = in->miptex;
miptex = LittleLong( in->miptex );
if( miptex < 0 || miptex > loadmodel->numtextures )
miptex = 0; // this is possible?
out->texture = loadmodel->textures[miptex];
Expand Down Expand Up @@ -2427,21 +2445,21 @@ static void Mod_LoadSurfaces( dbspmodel_t *bmod )
{
dface_t *in = &bmod->surfaces[i];

if(( in->firstedge + in->numedges ) > loadmodel->numsurfedges )
if(( LittleLong( in->firstedge ) + LittleShort( in->numedges ) ) > loadmodel->numsurfedges )
{
Con_Reportf( S_ERROR "bad surface %i from %zu\n", i, bmod->numsurfaces );
Con_Reportf( S_ERROR "bad surface %i from %d\n", i, bmod->numsurfaces );
continue;
}

out->firstedge = in->firstedge;
out->numedges = in->numedges;
out->firstedge = LittleLong( in->firstedge );
out->numedges = LittleShort( in->numedges );
if( in->side ) SetBits( out->flags, SURF_PLANEBACK );
out->plane = loadmodel->planes + in->planenum;
out->texinfo = loadmodel->texinfo + in->texinfo;
out->plane = loadmodel->planes + LittleShort( in->planenum );
out->texinfo = loadmodel->texinfo + LittleShort( in->texinfo );

for( j = 0; j < MAXLIGHTMAPS; j++ )
out->styles[j] = in->styles[j];
lightofs = in->lightofs;
lightofs = LittleLong( in->lightofs );
}

tex = out->texinfo->texture;
Expand Down Expand Up @@ -2573,18 +2591,18 @@ static void Mod_LoadNodes( dbspmodel_t *bmod )

for( j = 0; j < 3; j++ )
{
out->minmaxs[j+0] = in->mins[j];
out->minmaxs[j+3] = in->maxs[j];
out->minmaxs[j+0] = LittleShort( in->mins[j] );
out->minmaxs[j+3] = LittleShort( in->maxs[j] );
}

p = in->planenum;
p = LittleLong( in->planenum );
out->plane = loadmodel->planes + p;
out->firstsurface = in->firstface;
out->numsurfaces = in->numfaces;
out->firstsurface = LittleShort( in->firstface );
out->numsurfaces = LittleShort( in->numfaces );

for( j = 0; j < 2; j++ )
{
p = in->children[j];
p = LittleShort( in->children[j] );
if( p >= 0 ) out->children[j] = loadmodel->nodes + p;
else out->children[j] = (mnode_t *)(loadmodel->leafs + ( -1 - p ));
}
Expand Down Expand Up @@ -2644,18 +2662,18 @@ static void Mod_LoadLeafs( dbspmodel_t *bmod )

for( j = 0; j < 3; j++ )
{
out->minmaxs[j+0] = in->mins[j];
out->minmaxs[j+3] = in->maxs[j];
out->minmaxs[j+0] = LittleLong( in->mins[j] );
out->minmaxs[j+3] = LittleLong( in->maxs[j] );
}

out->contents = in->contents;
p = in->visofs;
out->contents = LittleLong( in->contents );
p = LittleLong( in->visofs );

for( j = 0; j < 4; j++ )
out->ambient_sound_level[j] = in->ambient_level[j];

out->firstmarksurface = loadmodel->marksurfaces + in->firstmarksurface;
out->nummarksurfaces = in->nummarksurfaces;
out->firstmarksurface = loadmodel->marksurfaces + LittleShort( in->firstmarksurface );
out->nummarksurfaces = LittleShort( in->nummarksurfaces );
}

if( bmod->isworld )
Expand Down Expand Up @@ -2726,10 +2744,10 @@ static void Mod_LoadClipnodes( dbspmodel_t *bmod )

for( i = 0; i < bmod->numclipnodes; i++, out++, in++ )
{
out->planenum = in->planenum;
out->planenum = LittleLong( in->planenum );

out->children[0] = (unsigned short)in->children[0];
out->children[1] = (unsigned short)in->children[1];
out->children[0] = LittleShort( (unsigned short)in->children[0] );
out->children[1] = LittleShort( (unsigned short)in->children[1] );

// Arguire QBSP 'broken' clipnodes
if( out->children[0] >= bmod->numclipnodes )
Expand Down Expand Up @@ -2879,6 +2897,26 @@ static int Mod_LumpLooksLikeEntities( const char *lump, const size_t lumplen )
return Q_memmem( lump, lumplen, "\"classname\"", sizeof( "\"classname\"" ) - 1 ) != NULL ? 1 : 0;
}

/*
=================
Mod_LoadBSPHeader

=================
*/
_inline dheader_t* Mod_LoadBSPHeader( const byte *mod_base )
{
dheader_t *header = (dheader_t *)mod_base;
#ifdef XASH_BIG_ENDIAN
LittleLongSW( header->version );
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You're potentially writing to const here. While this memory isn't read-only, I'm not sure if it's a good solution here. I think we can remove const modifier from BSP model loader for now.

Also, you can use static inline instead of _inline. Or even just static, since most compilers do ignore inline keyword.

_inline is a legacy macro definition I forgot about, it's almost not used in new code.

for( int i = 0; i < HEADER_LUMPS; i++ )
{
LittleLongSW( header->lumps[i].fileofs );
LittleLongSW( header->lumps[i].filelen );
}
#endif
return header;
}

/*
=================
Mod_LoadBmodelLumps
Expand All @@ -2888,8 +2926,8 @@ loading and processing bmodel
*/
qboolean Mod_LoadBmodelLumps( const byte *mod_base, qboolean isworld )
{
const dheader_t *header = (const dheader_t *)mod_base;
const dextrahdr_t *extrahdr = (const dextrahdr_t *)(mod_base + sizeof( dheader_t ));
const dheader_t *header = Mod_LoadBSPHeader( mod_base );
const dextrahdr_t *extrahdr = (dextrahdr_t *)(mod_base + sizeof( dheader_t ));
dbspmodel_t *bmod = &srcmodel;
model_t *mod = loadmodel;
char wadvalue[2048];
Expand Down Expand Up @@ -3054,7 +3092,7 @@ return real entities lump (for bshift swapped lumps)
*/
qboolean Mod_TestBmodelLumps( file_t *f, const char *name, const byte *mod_base, qboolean silent, dlump_t *entities )
{
const dheader_t *header = (const dheader_t *)mod_base;
const dheader_t *header = Mod_LoadBSPHeader( mod_base );
const dextrahdr_t *extrahdr = (const dextrahdr_t *)( mod_base + sizeof( dheader_t ));
int i, flags = LUMP_TESTONLY;

Expand Down
2 changes: 1 addition & 1 deletion engine/common/model.c
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Expand Up @@ -303,7 +303,7 @@ model_t *Mod_LoadModel( model_t *mod, qboolean crash )
loaded = true;
break;
case Q1BSP_VERSION:
case HLBSP_VERSION:
case LittleLong(HLBSP_VERSION):
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I suggest you to change this:

uint32_t version;

version = LittleLong( *(uint *)buf );

So you don't have to add macro calls to every version check.

case QBSP2_VERSION:
Mod_LoadBrushModel( mod, buf, &loaded );
// ref.dllFuncs.Mod_LoadModel( mod_brush, mod, buf, &loaded, 0 );
Expand Down
4 changes: 4 additions & 0 deletions filesystem/wad.c
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Expand Up @@ -337,6 +337,10 @@ static wfile_t *W_Open( const char *filename, int *error )
return NULL;
}

LittleLongSW(header.ident);
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Spaces in parentheses. :)
It's fine to not have them in type casts and between consequent parentheses, but they should be everywhere else:
For example:

(T *)(expr + (expression2 * n))

should be formatted as:

(T *)( expr + ( expression2 * n ))

Sorry, don't have clang-format for this yet, but we probably will migrate to something similar later.

LittleLongSW(header.numlumps);
LittleLongSW(header.infotableofs);

if( header.ident != IDWAD2HEADER && header.ident != IDWAD3HEADER )
{
Con_Reportf( S_ERROR "W_Open: %s is not a WAD2 or WAD3 file\n", filename );
Expand Down
3 changes: 2 additions & 1 deletion public/xash3d_mathlib.h
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Expand Up @@ -80,8 +80,9 @@ GNU General Public License for more details.
#define Q_round( x, y ) (floor( x / y + 0.5f ) * y )
#define Q_rint(x) ((x) < 0.0f ? ((int)((x)-0.5f)) : ((int)((x)+0.5f)))

#ifdef XASH_IRIX
#if defined( XASH_IRIX ) && defined( __GNUC__ )
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Same as above. You can just use simple and readable #if XASH_IRIX && __GNUC__.

#undef isnan
#define isnan __builtin_isnan
#endif
#ifdef isnan // check for C99 isnan
#define IS_NAN isnan
Expand Down
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