/*
Copyright (C) 1996-1997 Id Software, Inc.
Portions Copyright (C) 1999,2000  Nelson Rush.
Copyright (C) 1999,2000  contributors of the QuakeForge project
Please see the file "AUTHORS" for a list of contributors

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.

*/
// common.c -- misc functions used in client and server

/*
============================================================================

					LIBRARY REPLACEMENT FUNCTIONS

============================================================================
*/

void Q_memset (void *dest, int fill, int count)
{
	int             i;
	
	if ( (((long)dest | count) & 3) == 0)
	{
		count >>= 2;
		fill = fill | (fill<<8) | (fill<<16) | (fill<<24);
		for (i=0 ; i<count ; i++)
			((int *)dest)[i] = fill;
	}
	else
		for (i=0 ; i<count ; i++)
			((byte *)dest)[i] = fill;
}

void Q_memcpy (void *dest, void *src, int count)
{
	int             i;
	
	if (( ( (long)dest | (long)src | count) & 3) == 0 )
	{
		count>>=2;
		for (i=0 ; i<count ; i++)
			((int *)dest)[i] = ((int *)src)[i];
	}
	else
		for (i=0 ; i<count ; i++)
			((byte *)dest)[i] = ((byte *)src)[i];
}

int Q_memcmp (void *m1, void *m2, int count)
{
	while(count)
	{
		count--;
		if (((byte *)m1)[count] != ((byte *)m2)[count])
			return -1;
	}
	return 0;
}

void Q_strcpy (char *dest, char *src)
{
	while (*src)
	{
		*dest++ = *src++;
	}
	*dest++ = 0;
}

void Q_strncpy (char *dest, char *src, int count)
{
	while (*src && count--)
	{
		*dest++ = *src++;
	}
	if (count)
		*dest++ = 0;
}

int Q_strlen (char *str)
{
	int             count;
	
	count = 0;
	while (str[count])
		count++;

	return count;
}

char *Q_strrchr(char *s, char c)
{
    int len = Q_strlen(s);
    s += len;
    while (len--)
	if (*--s == c) return s;
    return 0;
}

void Q_strcat (char *dest, char *src)
{
	dest += Q_strlen(dest);
	Q_strcpy (dest, src);
}

int Q_strcmp (char *s1, char *s2)
{
	while (1)
	{
		if (*s1 != *s2)
			return -1;              // strings not equal    
		if (!*s1)
			return 0;               // strings are equal
		s1++;
		s2++;
	}
	
	return -1;
}

int Q_strncmp (char *s1, char *s2, int count)
{
	while (1)
	{
		if (!count--)
			return 0;
		if (*s1 != *s2)
			return -1;              // strings not equal    
		if (!*s1)
			return 0;               // strings are equal
		s1++;
		s2++;
	}
	
	return -1;
}

int Q_strncasecmp (char *s1, char *s2, int n)
{
	int             c1, c2;
	
	while (1)
	{
		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
		}
		if (!c1)
			return 0;               // strings are equal
//              s1++;
//              s2++;
	}
	
	return -1;
}

int Q_strcasecmp (char *s1, char *s2)
{
	return Q_strncasecmp (s1, s2, 99999);
}

int Q_atoi (char *str)
{
	int             val;
	int             sign;
	int             c;
	
	if (*str == '-')
	{
		sign = -1;
		str++;
	}
	else
		sign = 1;
		
	val = 0;

//
// check for hex
//
	if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X') )
	{
		str += 2;
		while (1)
		{
			c = *str++;
			if (c >= '0' && c <= '9')
				val = (val<<4) + c - '0';
			else if (c >= 'a' && c <= 'f')
				val = (val<<4) + c - 'a' + 10;
			else if (c >= 'A' && c <= 'F')
				val = (val<<4) + c - 'A' + 10;
			else
				return val*sign;
		}
	}
	
//
// check for character
//
	if (str[0] == '\'')
	{
		return sign * str[1];
	}
	
//
// assume decimal
//
	while (1)
	{
		c = *str++;
		if (c <'0' || c > '9')
			return val*sign;
		val = val*10 + c - '0';
	}
	
	return 0;
}


float Q_atof (char *str)
{
	double			val;
	int             sign;
	int             c;
	int             decimal, total;
	
	if (*str == '-')
	{
		sign = -1;
		str++;
	}
	else
		sign = 1;
		
	val = 0;

//
// check for hex
//
	if (str[0] == '0' && (str[1] == 'x' || str[1] == 'X') )
	{
		str += 2;
		while (1)
		{
			c = *str++;
			if (c >= '0' && c <= '9')
				val = (val*16) + c - '0';
			else if (c >= 'a' && c <= 'f')
				val = (val*16) + c - 'a' + 10;
			else if (c >= 'A' && c <= 'F')
				val = (val*16) + c - 'A' + 10;
			else
				return val*sign;
		}
	}
	
//
// check for character
//
	if (str[0] == '\'')
	{
		return sign * str[1];
	}
	
//
// assume decimal
//
	decimal = -1;
	total = 0;
	while (1)
	{
		c = *str++;
		if (c == '.')
		{
			decimal = total;
			continue;
		}
		if (c <'0' || c > '9')
			break;
		val = val*10 + c - '0';
		total++;
	}

	if (decimal == -1)
		return val*sign;
	while (total > decimal)
	{
		val /= 10;
		total--;
	}
	
	return val*sign;
}