/*
* Copyright(c) 1997-2001 Id Software, Inc.
* Copyright(c) 2002 The Quakeforge Project.
* Copyright(c) 2006 Quetoo.
*
* 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};


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];
	}
}


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){
	int tmp = *(int *)(char *) & f;
	tmp &= 0x7FFFFFFF;
	return *(float *)(char *) &tmp;
}


/*
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){
	a =(360.0 / 65536) *((int)(a *(65536 / 360.0)) & 65535);
	return a;
}


/*
BoxOnPlaneSide
 
Returns 1, 2, or 1 + 2
*/
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;
}


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];
}

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];
}

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;
}


/* 
Like glob_match, but match pattern against any final segment of text.
*/
int COM_GlobMatchStar(char *pattern, char *text){
	register char *p = pattern, *t = text;
	register char c, c1;
	
	while((c = *p++) == '?' || c == '*')
		if(c == '?' && *t++ == '\0')
			return 0;
			
	if(c == '\0')
		return 1;
		
	if(c == '\\')
		c1 = *p;
	else
		c1 = c;
		
	while(1){
		if((c == '[' || *t == c1) && COM_GlobMatch(p - 1, t))
			return 1;
		if(*t++ == '\0')
			return 0;
	}
}

/* Match the pattern against the text;
   return 1 if it matches, 0 otherwise.
 
   A match means the entire string TEXT is used up in matching.
 
   In the pattern string, `*' matches any sequence of characters,
   `?' matches any character, [SET] matches any character in the specified set,
   [!SET] matches any character not in the specified set.
 
   A set is composed of characters or ranges; a range looks like
   character hyphen character(as in 0-9 or A-Z).
   [0-9a-zA-Z_] is the set of characters allowed in C identifiers.
   Any other character in the pattern must be matched exactly.
 
   To suppress the special syntactic significance of any of `[]*?!-\',
   and match the character exactly, precede it with a `\'.
*/

int COM_GlobMatch(char *pattern, char *text){
	register char *p = pattern, *t = text;
	register char c;
	
	while((c = *p++) != '\0')
		switch(c){
			case '?':
				if(*t == '\0')
					return 0;
				else
					++t;
				break;
				
			case '\\':
				if(*p++ != *t++)
					return 0;
				break;
				
			case '*':
				return COM_GlobMatchStar(p, t);
				
			case '[': {
					register char c1 = *t++;
					int invert;
					
					if(!c1)
						return(0);
						
					invert =((*p == '!') ||(*p == '^'));
					if(invert)
						p++;
						
					c = *p++;
					while(1){
						register char cstart = c, cend = c;
						
						if(c == '\\'){
							cstart = *p++;
							cend = cstart;
						}
						if(c == '\0')
							return 0;
							
						c = *p++;
						if(c == '-' && *p != ']'){
							cend = *p++;
							if(cend == '\\')
								cend = *p++;
							if(cend == '\0')
								return 0;
							c = *p++;
						}
						if(c1 >= cstart && c1 <= cend)
							goto match;
						if(c == ']')
							break;
					}
					if(!invert)
						return 0;
					break;
					
match:
					/* Skip the rest of the [...] construct that already matched.  */
					while(c != ']'){
						if(c == '\0')
							return 0;
						c = *p++;
						if(c == '\0')
							return 0;
						else if(c == '\\')
							++p;
					}
					if(invert)
						return 0;
					break;
				}
				
			default:
				if(c != *t++)
					return 0;
		}
		
	return *t == '\0';
}

/*
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;
}


/*
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);
	vsnprintf(string, 1024, 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){
		len = 0;
	}
	com_token[len] = 0;
	
	*data_p = data;
	return com_token;
}

/*
 
  LIBRARY REPLACEMENT FUNCTIONS
 
*/

int Q_stricmp(char *s1, char *s2){
#ifdef _WIN32
	return strnicmp(s1, s2, 9999);
#else
	return strncasecmp(s1, s2, 9999);
#endif
}

void Com_sprintf(char *dest, int size, char *fmt, ...){
	int len;
	va_list	argptr;
	static char bigbuffer[0x10000];
	
	va_start(argptr, fmt);
	len = vsnprintf(bigbuffer, 0x10000, fmt, argptr);
	va_end(argptr);
	
	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, "\\")){
		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;
}