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quake2/game/q_shared.c

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26 KiB
C
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as released 2001-12-22
2001-12-22 00:00:00 +00:00
/*
Copyright (C) 1997-2001 Id Software, Inc.
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 a2, float a1, 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;
}
int i;
vec3_t corners[2];
// this is the slow, general version
int BoxOnPlaneSide2 (vec3_t emins, vec3_t emaxs, struct cplane_s *p)
{
int i;
float dist1, dist2;
int sides;
vec3_t corners[2];
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__
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];
}
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};
// set the byte swapping variables in a portable manner
if ( *(short *)swaptest == 1)
{
bigendien = false;
_BigShort = ShortSwap;
_LittleShort = ShortNoSwap;
_BigLong = LongSwap;
_LittleLong = LongNoSwap;
_BigFloat = FloatSwap;
_LittleFloat = FloatNoSwap;
}
else
{
bigendien = true;
_BigShort = ShortNoSwap;
_LittleShort = ShortSwap;
_BigLong = LongNoSwap;
_LittleLong = LongSwap;
_BigFloat = FloatNoSwap;
_LittleFloat = FloatSwap;
}
}
/*
============
va
does a varargs printf into a temp buffer, so I don't need to have
varargs versions of all text functions.
FIXME: make this buffer size safe someday
============
*/
char *va(char *format, ...)
{
va_list argptr;
static char string[1024];
va_start (argptr, format);
vsprintf (string, format,argptr);
va_end (argptr);
return string;
}
char com_token[MAX_TOKEN_CHARS];
/*
==============
COM_Parse
Parse a token out of a string
==============
*/
char *COM_Parse (char **data_p)
{
int c;
int len;
char *data;
data = *data_p;
len = 0;
com_token[0] = 0;
if (!data)
{
*data_p = NULL;
return "";
}
// skip whitespace
skipwhite:
while ( (c = *data) <= ' ')
{
if (c == 0)
{
*data_p = NULL;
return "";
}
data++;
}
// skip // comments
if (c=='/' && data[1] == '/')
{
while (*data && *data != '\n')
data++;
goto skipwhite;
}
// handle quoted strings specially
if (c == '\"')
{
data++;
while (1)
{
c = *data++;
if (c=='\"' || !c)
{
com_token[len] = 0;
*data_p = data;
return com_token;
}
if (len < MAX_TOKEN_CHARS)
{
com_token[len] = c;
len++;
}
}
}
// parse a regular word
do
{
if (len < MAX_TOKEN_CHARS)
{
com_token[len] = c;
len++;
}
data++;
c = *data;
} while (c>32);
if (len == MAX_TOKEN_CHARS)
{
// Com_Printf ("Token exceeded %i chars, discarded.\n", MAX_TOKEN_CHARS);
len = 0;
}
com_token[len] = 0;
*data_p = data;
return com_token;
}
/*
===============
Com_PageInMemory
===============
*/
int paged_total;
void Com_PageInMemory (byte *buffer, int size)
{
int i;
for (i=size-1 ; i>0 ; i-=4096)
paged_total += buffer[i];
}
/*
============================================================================
LIBRARY REPLACEMENT FUNCTIONS
============================================================================
*/
// FIXME: replace all Q_stricmp with Q_strcasecmp
int Q_stricmp (char *s1, char *s2)
{
#if defined(WIN32)
return _stricmp (s1, s2);
#else
return strcasecmp (s1, s2);
#endif
}
int Q_strncasecmp (char *s1, char *s2, int n)
{
int c1, c2;
do
{
c1 = *s1++;
c2 = *s2++;
if (!n--)
return 0; // strings are equal until end point
if (c1 != c2)
{
if (c1 >= 'a' && c1 <= 'z')
c1 -= ('a' - 'A');
if (c2 >= 'a' && c2 <= 'z')
c2 -= ('a' - 'A');
if (c1 != c2)
return -1; // strings not equal
}
} while (c1);
return 0; // strings are equal
}
int Q_strcasecmp (char *s1, char *s2)
{
return Q_strncasecmp (s1, s2, 99999);
}
void Com_sprintf (char *dest, int size, char *fmt, ...)
{
int len;
va_list argptr;
char bigbuffer[0x10000];
va_start (argptr,fmt);
len = vsprintf (bigbuffer,fmt,argptr);
va_end (argptr);
if (len >= size)
Com_Printf ("Com_sprintf: overflow of %i in %i\n", len, size);
strncpy (dest, bigbuffer, size-1);
}
/*
=====================================================================
INFO STRINGS
=====================================================================
*/
/*
===============
Info_ValueForKey
Searches the string for the given
key and returns the associated value, or an empty string.
===============
*/
char *Info_ValueForKey (char *s, char *key)
{
char pkey[512];
static char value[2][512]; // use two buffers so compares
// work without stomping on each other
static int valueindex;
char *o;
valueindex ^= 1;
if (*s == '\\')
s++;
while (1)
{
o = pkey;
while (*s != '\\')
{
if (!*s)
return "";
*o++ = *s++;
}
*o = 0;
s++;
o = value[valueindex];
while (*s != '\\' && *s)
{
if (!*s)
return "";
*o++ = *s++;
}
*o = 0;
if (!strcmp (key, pkey) )
return value[valueindex];
if (!*s)
return "";
s++;
}
}
void Info_RemoveKey (char *s, char *key)
{
char *start;
char pkey[512];
char value[512];
char *o;
if (strstr (key, "\\"))
{
// Com_Printf ("Can't use a key with a \\\n");
return;
}
while (1)
{
start = s;
if (*s == '\\')
s++;
o = pkey;
while (*s != '\\')
{
if (!*s)
return;
*o++ = *s++;
}
*o = 0;
s++;
o = value;
while (*s != '\\' && *s)
{
if (!*s)
return;
*o++ = *s++;
}
*o = 0;
if (!strcmp (key, pkey) )
{
strcpy (start, s); // remove this part
return;
}
if (!*s)
return;
}
}
/*
==================
Info_Validate
Some characters are illegal in info strings because they
can mess up the server's parsing
==================
*/
qboolean Info_Validate (char *s)
{
if (strstr (s, "\""))
return false;
if (strstr (s, ";"))
return false;
return true;
}
void Info_SetValueForKey (char *s, char *key, char *value)
{
char newi[MAX_INFO_STRING], *v;
int c;
int maxsize = MAX_INFO_STRING;
if (strstr (key, "\\") || strstr (value, "\\") )
{
Com_Printf ("Can't use keys or values with a \\\n");
return;
}
if (strstr (key, ";") )
{
Com_Printf ("Can't use keys or values with a semicolon\n");
return;
}
if (strstr (key, "\"") || strstr (value, "\"") )
{
Com_Printf ("Can't use keys or values with a \"\n");
return;
}
if (strlen(key) > MAX_INFO_KEY-1 || strlen(value) > MAX_INFO_KEY-1)
{
Com_Printf ("Keys and values must be < 64 characters.\n");
return;
}
Info_RemoveKey (s, key);
if (!value || !strlen(value))
return;
Com_sprintf (newi, sizeof(newi), "\\%s\\%s", key, value);
if (strlen(newi) + strlen(s) > maxsize)
{
Com_Printf ("Info string length exceeded\n");
return;
}
// only copy ascii values
s += strlen(s);
v = newi;
while (*v)
{
c = *v++;
c &= 127; // strip high bits
if (c >= 32 && c < 127)
*s++ = c;
}
*s = 0;
}
//====================================================================
Reference in a new issue Copy permalink