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q_shared.c
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/* D-Day: Normandy by Vipersoft
************************************
* $Source: /usr/local/cvsroot/dday/src/q_shared.c,v $
* $Revision: 1.6 $
* $Date: 2002/07/23 19:12:49 $
*
***********************************
Copyright (C) 2002 Vipersoft
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#include "q_shared.h"
#define DEG2RAD( a ) ( a * M_PI ) / 180.0F
vec3_t vec3_origin = { 0,0,0 };
//============================================================================
#ifdef _WIN32
#pragma optimize( "", off )
#endif
void RotatePointAroundVector(vec3_t dst, const vec3_t dir, const vec3_t point, float degrees)
{
float m[3][3];
float im[3][3];
float zrot[3][3];
float tmpmat[3][3];
float rot[3][3];
int i;
vec3_t vr, vup, vf;
vf[0] = dir[0];
vf[1] = dir[1];
vf[2] = dir[2];
PerpendicularVector(vr, dir);
CrossProduct(vr, vf, vup);
m[0][0] = vr[0];
m[1][0] = vr[1];
m[2][0] = vr[2];
m[0][1] = vup[0];
m[1][1] = vup[1];
m[2][1] = vup[2];
m[0][2] = vf[0];
m[1][2] = vf[1];
m[2][2] = vf[2];
memcpy(im, m, sizeof(im));
im[0][1] = m[1][0];
im[0][2] = m[2][0];
im[1][0] = m[0][1];
im[1][2] = m[2][1];
im[2][0] = m[0][2];
im[2][1] = m[1][2];
memset(zrot, 0, sizeof(zrot));
zrot[0][0] = zrot[1][1] = zrot[2][2] = 1.0F;
zrot[0][0] = cos(DEG2RAD(degrees));
zrot[0][1] = sin(DEG2RAD(degrees));
zrot[1][0] = -sin(DEG2RAD(degrees));
zrot[1][1] = cos(DEG2RAD(degrees));
R_ConcatRotations(m, zrot, tmpmat);
R_ConcatRotations(tmpmat, im, rot);
for (i = 0; i < 3; i++)
{
dst[i] = rot[i][0] * point[0] + rot[i][1] * point[1] + rot[i][2] * point[2];
}
}
#ifdef _WIN32
#pragma optimize( "", on )
#endif
void AngleVectors(vec3_t angles, vec3_t forward, vec3_t right, vec3_t up)
{
float angle;
static float sr, sp, sy, cr, cp, cy;
// static to help MS compiler fp bugs
angle = angles[YAW] * (M_PI * 2 / 360);
sy = sin(angle);
cy = cos(angle);
angle = angles[PITCH] * (M_PI * 2 / 360);
sp = sin(angle);
cp = cos(angle);
angle = angles[ROLL] * (M_PI * 2 / 360);
sr = sin(angle);
cr = cos(angle);
if (forward)
{
forward[0] = cp * cy;
forward[1] = cp * sy;
forward[2] = -sp;
}
if (right)
{
right[0] = (-1 * sr * sp * cy + -1 * cr * -sy);
right[1] = (-1 * sr * sp * sy + -1 * cr * cy);
right[2] = -1 * sr * cp;
}
if (up)
{
up[0] = (cr * sp * cy + -sr * -sy);
up[1] = (cr * sp * sy + -sr * cy);
up[2] = cr * cp;
}
}
void ProjectPointOnPlane(vec3_t dst, const vec3_t p, const vec3_t normal)
{
float d;
vec3_t n;
float inv_denom;
inv_denom = 1.0F / DotProduct(normal, normal);
d = DotProduct(normal, p) * inv_denom;
n[0] = normal[0] * inv_denom;
n[1] = normal[1] * inv_denom;
n[2] = normal[2] * inv_denom;
dst[0] = p[0] - d * n[0];
dst[1] = p[1] - d * n[1];
dst[2] = p[2] - d * n[2];
}
/*
** assumes "src" is normalized
*/
void PerpendicularVector(vec3_t dst, const vec3_t src)
{
int pos;
int i;
float minelem = 1.0F;
vec3_t tempvec;
/*
** find the smallest magnitude axially aligned vector
*/
for (pos = 0, i = 0; i < 3; i++)
{
if (fabs(src[i]) < minelem)
{
pos = i;
minelem = fabs(src[i]);
}
}
tempvec[0] = tempvec[1] = tempvec[2] = 0.0F;
tempvec[pos] = 1.0F;
/*
** project the point onto the plane defined by src
*/
ProjectPointOnPlane(dst, tempvec, src);
/*
** normalize the result
*/
VectorNormalize(dst);
}
/*
================
R_ConcatRotations
================
*/
void R_ConcatRotations(float in1[3][3], float in2[3][3], float out[3][3])
{
out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] +
in1[0][2] * in2[2][0];
out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] +
in1[0][2] * in2[2][1];
out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] +
in1[0][2] * in2[2][2];
out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] +
in1[1][2] * in2[2][0];
out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] +
in1[1][2] * in2[2][1];
out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] +
in1[1][2] * in2[2][2];
out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] +
in1[2][2] * in2[2][0];
out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] +
in1[2][2] * in2[2][1];
out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] +
in1[2][2] * in2[2][2];
}
/*
================
R_ConcatTransforms
================
*/
void R_ConcatTransforms(float in1[3][4], float in2[3][4], float out[3][4])
{
out[0][0] = in1[0][0] * in2[0][0] + in1[0][1] * in2[1][0] +
in1[0][2] * in2[2][0];
out[0][1] = in1[0][0] * in2[0][1] + in1[0][1] * in2[1][1] +
in1[0][2] * in2[2][1];
out[0][2] = in1[0][0] * in2[0][2] + in1[0][1] * in2[1][2] +
in1[0][2] * in2[2][2];
out[0][3] = in1[0][0] * in2[0][3] + in1[0][1] * in2[1][3] +
in1[0][2] * in2[2][3] + in1[0][3];
out[1][0] = in1[1][0] * in2[0][0] + in1[1][1] * in2[1][0] +
in1[1][2] * in2[2][0];
out[1][1] = in1[1][0] * in2[0][1] + in1[1][1] * in2[1][1] +
in1[1][2] * in2[2][1];
out[1][2] = in1[1][0] * in2[0][2] + in1[1][1] * in2[1][2] +
in1[1][2] * in2[2][2];
out[1][3] = in1[1][0] * in2[0][3] + in1[1][1] * in2[1][3] +
in1[1][2] * in2[2][3] + in1[1][3];
out[2][0] = in1[2][0] * in2[0][0] + in1[2][1] * in2[1][0] +
in1[2][2] * in2[2][0];
out[2][1] = in1[2][0] * in2[0][1] + in1[2][1] * in2[1][1] +
in1[2][2] * in2[2][1];
out[2][2] = in1[2][0] * in2[0][2] + in1[2][1] * in2[1][2] +
in1[2][2] * in2[2][2];
out[2][3] = in1[2][0] * in2[0][3] + in1[2][1] * in2[1][3] +
in1[2][2] * in2[2][3] + in1[2][3];
}
//============================================================================
float Q_fabs(float f)
{
#if 0
if (f >= 0)
return f;
return -f;
#else
int tmp = *(int*)&f;
tmp &= 0x7FFFFFFF;
return *(float*)&tmp;
#endif
}
#if defined _M_IX86 && !defined C_ONLY
#pragma warning (disable:4035)
__declspec(naked) long Q_ftol(float f)
{
static int tmp;
__asm fld dword ptr[esp + 4]
__asm fistp tmp
__asm mov eax, tmp
__asm ret
}
#pragma warning (default:4035)
#endif
/*
===============
LerpAngle
===============
*/
float LerpAngle(float a1, float a2, float frac)
{
if (a1 - a2 > 180)
a1 -= 360;
if (a1 - a2 < -180)
a1 += 360;
return a2 + frac * (a1 - a2);
}
float anglemod(float a)
{
#if 0
if (a >= 0)
a -= 360 * (int)(a / 360);
else
a += 360 * (1 + (int)(-a / 360));
#endif
a = (360.0 / 65536) * ((int)(a * (65536 / 360.0)) & 65535);
return a;
}
// this is the slow, general version
int BoxOnPlaneSide2(vec3_t emins, vec3_t emaxs, struct cplane_s* p)
{
int i;
vec3_t corners[2] = { 0 };
float dist1, dist2;
int sides;
for (i = 0; i < 3; i++)
{
if (p->normal[i] < 0)
{
corners[0][i] = emins[i];
corners[1][i] = emaxs[i];
}
else
{
corners[1][i] = emins[i];
corners[0][i] = emaxs[i];
}
}
dist1 = DotProduct(p->normal, corners[0]) - p->dist;
dist2 = DotProduct(p->normal, corners[1]) - p->dist;
sides = 0;
if (dist1 >= 0)
sides = 1;
if (dist2 < 0)
sides |= 2;
return sides;
}
/*
==================
BoxOnPlaneSide
Returns 1, 2, or 1 + 2
==================
*/
#if !id386 || defined __linux__ || defined(AMIGA)
int BoxOnPlaneSide(vec3_t emins, vec3_t emaxs, struct cplane_s* p)
{
float dist1, dist2;
int sides;
// fast axial cases
if (p->type < 3)
{
if (p->dist <= emins[p->type])
return 1;
if (p->dist >= emaxs[p->type])
return 2;
return 3;
}
// general case
switch (p->signbits)
{
case 0:
dist1 = p->normal[0] * emaxs[0] + p->normal[1] * emaxs[1] + p->normal[2] * emaxs[2];
dist2 = p->normal[0] * emins[0] + p->normal[1] * emins[1] + p->normal[2] * emins[2];
break;
case 1:
dist1 = p->normal[0] * emins[0] + p->normal[1] * emaxs[1] + p->normal[2] * emaxs[2];
dist2 = p->normal[0] * emaxs[0] + p->normal[1] * emins[1] + p->normal[2] * emins[2];
break;
case 2:
dist1 = p->normal[0] * emaxs[0] + p->normal[1] * emins[1] + p->normal[2] * emaxs[2];
dist2 = p->normal[0] * emins[0] + p->normal[1] * emaxs[1] + p->normal[2] * emins[2];
break;
case 3:
dist1 = p->normal[0] * emins[0] + p->normal[1] * emins[1] + p->normal[2] * emaxs[2];
dist2 = p->normal[0] * emaxs[0] + p->normal[1] * emaxs[1] + p->normal[2] * emins[2];
break;
case 4:
dist1 = p->normal[0] * emaxs[0] + p->normal[1] * emaxs[1] + p->normal[2] * emins[2];
dist2 = p->normal[0] * emins[0] + p->normal[1] * emins[1] + p->normal[2] * emaxs[2];
break;
case 5:
dist1 = p->normal[0] * emins[0] + p->normal[1] * emaxs[1] + p->normal[2] * emins[2];
dist2 = p->normal[0] * emaxs[0] + p->normal[1] * emins[1] + p->normal[2] * emaxs[2];
break;
case 6:
dist1 = p->normal[0] * emaxs[0] + p->normal[1] * emins[1] + p->normal[2] * emins[2];
dist2 = p->normal[0] * emins[0] + p->normal[1] * emaxs[1] + p->normal[2] * emaxs[2];
break;
case 7:
dist1 = p->normal[0] * emins[0] + p->normal[1] * emins[1] + p->normal[2] * emins[2];
dist2 = p->normal[0] * emaxs[0] + p->normal[1] * emaxs[1] + p->normal[2] * emaxs[2];
break;
default:
dist1 = dist2 = 0; // shut up compiler
assert(0);
break;
}
sides = 0;
if (dist1 >= p->dist)
sides = 1;
if (dist2 < p->dist)
sides |= 2;
assert(sides != 0);
return sides;
}
#else
#pragma warning( disable: 4035 )
__declspec(naked) int BoxOnPlaneSide(vec3_t emins, vec3_t emaxs, struct cplane_s* p)
{
static int bops_initialized;
static int Ljmptab[8];
__asm {
push ebx
cmp bops_initialized, 1
je initialized
mov bops_initialized, 1
mov Ljmptab[0 * 4], offset Lcase0
mov Ljmptab[1 * 4], offset Lcase1
mov Ljmptab[2 * 4], offset Lcase2
mov Ljmptab[3 * 4], offset Lcase3
mov Ljmptab[4 * 4], offset Lcase4
mov Ljmptab[5 * 4], offset Lcase5
mov Ljmptab[6 * 4], offset Lcase6
mov Ljmptab[7 * 4], offset Lcase7
initialized :
mov edx, ds : dword ptr[4 + 12 + esp]
mov ecx, ds : dword ptr[4 + 4 + esp]
xor eax, eax
mov ebx, ds : dword ptr[4 + 8 + esp]
mov al, ds : byte ptr[17 + edx]
cmp al, 8
jge Lerror
fld ds : dword ptr[0 + edx]
fld st(0)
jmp dword ptr[Ljmptab + eax * 4]
Lcase0 :
fmul ds : dword ptr[ebx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ebx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase1 :
fmul ds : dword ptr[ecx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ebx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase2 :
fmul ds : dword ptr[ebx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ecx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase3 :
fmul ds : dword ptr[ecx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ecx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase4 :
fmul ds : dword ptr[ebx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ebx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase5 :
fmul ds : dword ptr[ecx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ebx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase6 :
fmul ds : dword ptr[ebx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ecx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ecx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
jmp LSetSides
Lcase7 :
fmul ds : dword ptr[ecx]
fld ds : dword ptr[0 + 4 + edx]
fxch st(2)
fmul ds : dword ptr[ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[4 + ecx]
fld ds : dword ptr[0 + 8 + edx]
fxch st(2)
fmul ds : dword ptr[4 + ebx]
fxch st(2)
fld st(0)
fmul ds : dword ptr[8 + ecx]
fxch st(5)
faddp st(3), st(0)
fmul ds : dword ptr[8 + ebx]
fxch st(1)
faddp st(3), st(0)
fxch st(3)
faddp st(2), st(0)
LSetSides :
faddp st(2), st(0)
fcomp ds : dword ptr[12 + edx]
xor ecx, ecx
fnstsw ax
fcomp ds : dword ptr[12 + edx]
and ah, 1
xor ah, 1
add cl, ah
fnstsw ax
and ah, 1
add ah, ah
add cl, ah
pop ebx
mov eax, ecx
ret
Lerror :
int 3
}
}
#pragma warning( default: 4035 )
#endif
void ClearBounds(vec3_t mins, vec3_t maxs)
{
mins[0] = mins[1] = mins[2] = 99999;
maxs[0] = maxs[1] = maxs[2] = -99999;
}
void AddPointToBounds(vec3_t v, vec3_t mins, vec3_t maxs)
{
int i;
vec_t val;
for (i = 0; i < 3; i++)
{
val = v[i];
if (val < mins[i])
mins[i] = val;
if (val > maxs[i])
maxs[i] = val;
}
}
int VectorCompare(vec3_t v1, vec3_t v2)
{
if (v1[0] != v2[0] || v1[1] != v2[1] || v1[2] != v2[2])
return 0;
return 1;
}
vec_t VectorNormalize(vec3_t v)
{
float length, ilength;
length = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
length = sqrt(length); // FIXME
if (length)
{
ilength = 1 / length;
v[0] *= ilength;
v[1] *= ilength;
v[2] *= ilength;
}
return length;
}
vec_t VectorNormalize2(vec3_t v, vec3_t out)
{
float length, ilength;
length = v[0] * v[0] + v[1] * v[1] + v[2] * v[2];
length = sqrt(length); // FIXME
if (length)
{
ilength = 1 / length;
out[0] = v[0] * ilength;
out[1] = v[1] * ilength;
out[2] = v[2] * ilength;
}
return length;
}
void VectorMA(vec3_t veca, float scale, vec3_t vecb, vec3_t vecc)
{
vecc[0] = veca[0] + scale * vecb[0];
vecc[1] = veca[1] + scale * vecb[1];
vecc[2] = veca[2] + scale * vecb[2];
}
vec_t _DotProduct(vec3_t v1, vec3_t v2)
{
return v1[0] * v2[0] + v1[1] * v2[1] + v1[2] * v2[2];
}
void _VectorSubtract(vec3_t veca, vec3_t vecb, vec3_t out)
{
out[0] = veca[0] - vecb[0];
out[1] = veca[1] - vecb[1];
out[2] = veca[2] - vecb[2];
}
void _VectorAdd(vec3_t veca, vec3_t vecb, vec3_t out)
{
out[0] = veca[0] + vecb[0];
out[1] = veca[1] + vecb[1];
out[2] = veca[2] + vecb[2];
}
void _VectorCopy(vec3_t in, vec3_t out)
{
out[0] = in[0];
out[1] = in[1];
out[2] = in[2];
}
void CrossProduct(vec3_t v1, vec3_t v2, vec3_t cross)
{
cross[0] = v1[1] * v2[2] - v1[2] * v2[1];
cross[1] = v1[2] * v2[0] - v1[0] * v2[2];
cross[2] = v1[0] * v2[1] - v1[1] * v2[0];
}
/* MetalGod already defined in corcrt_math.h
double sqrt(double x);
*/
vec_t VectorLength(vec3_t v)
{
int i;
float length;
length = 0;
for (i = 0; i < 3; i++)
length += v[i] * v[i];
length = sqrt(length); // FIXME
return length;
}
void VectorInverse(vec3_t v)
{
v[0] = -v[0];
v[1] = -v[1];
v[2] = -v[2];
}
void VectorScale(vec3_t in, vec_t scale, vec3_t out)
{
out[0] = in[0] * scale;
out[1] = in[1] * scale;
out[2] = in[2] * scale;
}
int Q_log2(int val)
{
int answer = 0;
while (val >>= 1)
answer++;
return answer;
}
//====================================================================================
/*
============
COM_SkipPath
============
*/
char* COM_SkipPath(char* pathname)
{
char* last;
last = pathname;
while (*pathname)
{
if (*pathname == '/')
last = pathname + 1;
pathname++;
}
return last;
}
/*
============
COM_StripExtension
============
*/
void COM_StripExtension(char* in, char* out)
{
while (*in && *in != '.')
*out++ = *in++;
*out = 0;
}
/*
============
COM_FileExtension
============
*/
char* COM_FileExtension(char* in)
{
static char exten[8];
int i;
while (*in && *in != '.')
in++;
if (!*in)
return "";
in++;
for (i = 0; i < 7 && *in; i++, in++)
exten[i] = *in;
exten[i] = 0;
return exten;
}
/*
============
COM_FileBase
============
*/
void COM_FileBase(char* in, char* out)
{
char* s, * s2;
s = in + strlen(in) - 1;
while (s != in && *s != '.')
s--;
for (s2 = s; s2 != in && *s2 != '/'; s2--)
;
if (s - s2 < 2)
out[0] = 0;
else
{
s--;
strncpy(out, s2 + 1, s - s2);
out[s - s2] = 0;
}
}
/*
============
COM_FilePath
Returns the path up to, but not including the last /
============
*/
void COM_FilePath(char* in, char* out)
{
char* s;
s = in + strlen(in) - 1;
while (s != in && *s != '/')
s--;
strncpy(out, in, s - in);
out[s - in] = 0;
}
/*
==================
COM_DefaultExtension
==================
*/
void COM_DefaultExtension(char* path, char* extension)
{
char* src;
//
// if path doesn't have a .EXT, append extension
// (extension should include the .)
//
src = path + strlen(path) - 1;
while (*src != '/' && src != path)
{
if (*src == '.')
return; // it has an extension
src--;
}
strcat(path, extension);
}
/*
============================================================================
BYTE ORDER FUNCTIONS
============================================================================
*/
qboolean bigendien;
// can't just use function pointers, or dll linkage can
// mess up when qcommon is included in multiple places
short (*_BigShort) (short l);
short (*_LittleShort) (short l);
int (*_BigLong) (int l);
int (*_LittleLong) (int l);
float (*_BigFloat) (float l);
float (*_LittleFloat) (float l);
short BigShort(short l) { return _BigShort(l); }
short LittleShort(short l) { return _LittleShort(l); }
int BigLong(int l) { return _BigLong(l); }
int LittleLong(int l) { return _LittleLong(l); }
float BigFloat(float l) { return _BigFloat(l); }
float LittleFloat(float l) { return _LittleFloat(l); }
short ShortSwap(short l)
{
byte b1, b2;
b1 = l & 255;
b2 = (l >> 8) & 255;
return (b1 << 8) + b2;
}
short ShortNoSwap(short l)
{
return l;
}
int LongSwap(int l)
{
byte b1, b2, b3, b4;
b1 = l & 255;
b2 = (l >> 8) & 255;
b3 = (l >> 16) & 255;
b4 = (l >> 24) & 255;
return ((int)b1 << 24) + ((int)b2 << 16) + ((int)b3 << 8) + b4;
}
int LongNoSwap(int l)
{
return l;
}
float FloatSwap(float f)
{
union
{
float f;
byte b[4];
} dat1, dat2;
dat1.f = f;
dat2.b[0] = dat1.b[3];
dat2.b[1] = dat1.b[2];
dat2.b[2] = dat1.b[1];
dat2.b[3] = dat1.b[0];
return dat2.f;
}
float FloatNoSwap(float f)
{
return f;
}
/*
================
Swap_Init
================
*/
void Swap_Init(void)
{
byte swaptest[2] = { 1,0 };