ddnet/src/engine/e_packer.c

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/* copyright (c) 2007 magnus auvinen, see licence.txt for more info */
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#include "e_packer.h"
#include "e_compression.h"
void packer_reset(PACKER *p)
{
p->error = 0;
p->current = p->buffer;
p->end = p->current + PACKER_BUFFER_SIZE;
}
void packer_add_int(PACKER *p, int i)
{
p->current = vint_pack(p->current, i);
}
void packer_add_string(PACKER *p, const char *str, int limit)
{
if(limit > 0)
{
while(*str && limit != 0)
{
*p->current++ = *str++;
limit--;
}
*p->current++ = 0;
}
else
{
while(*str)
*p->current++ = *str++;
*p->current++ = 0;
}
}
void packer_add_raw(PACKER *p, const unsigned char *data, int size)
{
while(size)
{
*p->current++ = *data++;
size--;
}
}
int packer_size(PACKER *p)
{
return (const unsigned char *)p->current-(const unsigned char *)p->buffer;
}
const unsigned char *packer_data(PACKER *p)
{
return (const unsigned char *)p->buffer;
}
void unpacker_reset(UNPACKER *p, const unsigned char *data, int size)
{
p->error = 0;
p->start = data;
p->end = p->start + size;
p->current = p->start;
}
int unpacker_get_int(UNPACKER *p)
{
int i;
if(p->current >= p->end)
return 0;
p->current = vint_unpack(p->current, &i);
return i;
}
const char *unpacker_get_string(UNPACKER *p)
{
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const char *ptr;
if(p->current >= p->end)
return "";
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ptr = (const char *)p->current;
while(*p->current) /* skip the string */
p->current++;
p->current++;
return ptr;
}
const unsigned char *unpacker_get_raw(UNPACKER *p, int size)
{
const unsigned char *ptr = p->current;
p->current += size;
return ptr;
}