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UnpackObjects.cpp
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370 lines (354 loc) · 7.19 KB
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#include"framework.h"
#include"Packing.h"
#include<stdio.h>
void pym_init(pyUnmarshalString_t *pms, uint8 *rawData, sint32 len)
{
pms->buffer = rawData;
pms->len = len;
pms->idx = 0;
pms->unpackErrorEncountered = false;
pms->stackIndex = 0;
}
bool pym_unpackTuple_begin(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x80 )
{
sint32 c = p & 0x0F;
sint32 tupleLen;
if( c <= 0xC )
{
tupleLen = c;
pms->idx++;
}
else if( c == 0xD )
{
tupleLen = *(uint8*)(pms->buffer+pms->idx+1);
pms->idx += 2;
}
else if( c == 0xE )
{
tupleLen = *(uint16*)(pms->buffer+pms->idx+1);
pms->idx += 3;
}
else
{
tupleLen = *(uint32*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
// add tuple container
pms->containerStack[pms->stackIndex].type = 't';
pms->containerStack[pms->stackIndex].size = tupleLen;
pms->containerStack[pms->stackIndex].subelementsLeft = tupleLen;
// dont reduce parent yet
pms->stackIndex++;
return true;
}
else
{
pms->unpackErrorEncountered = true;
return false;
}
}
/*
* Tries to unpack a list
* Returns the number of items in this list or -1 on error
*/
sint32 pym_unpackList_begin(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x70 )
{
sint32 c = p & 0x0F;
sint32 listLen;
if( c <= 0xC )
{
listLen = c;
pms->idx++;
}
else if( c == 0xD )
{
listLen = *(uint8*)(pms->buffer+pms->idx+1);
pms->idx += 2;
}
else if( c == 0xE )
{
listLen = *(uint16*)(pms->buffer+pms->idx+1);
pms->idx += 3;
}
else
{
listLen = *(uint32*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
// add list container
pms->containerStack[pms->stackIndex].type = 'l';
pms->containerStack[pms->stackIndex].size = listLen;
pms->containerStack[pms->stackIndex].subelementsLeft = listLen;
// dont reduce parent yet
pms->stackIndex++;
return listLen;
}
else
{
pms->unpackErrorEncountered = true;
return -1;
}
}
bool pym_unpackDict_begin(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x60 )
{
sint32 c = p & 0x0F;
sint32 dictSize;
if( c <= 0xC )
{
dictSize = c;
pms->idx++;
}
else if( c == 0xD )
{
dictSize = *(uint8*)(pms->buffer+pms->idx+1);
pms->idx += 2;
}
else if( c == 0xE )
{
dictSize = *(uint16*)(pms->buffer+pms->idx+1);
pms->idx += 3;
}
else
{
dictSize = *(uint32*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
// add dict container
pms->containerStack[pms->stackIndex].type = 'd';
pms->containerStack[pms->stackIndex].size = dictSize;
pms->containerStack[pms->stackIndex].subelementsLeft = dictSize*2;
pms->stackIndex++;
return true;
}
else
{
pms->unpackErrorEncountered = true;
return false;
}
}
sint32 pym_getContainerSize(pyUnmarshalString_t *pms)
{
if( pms->stackIndex == 0 )
return 0;
return pms->containerStack[pms->stackIndex-1].size;
}
sint32 pym_unpackInt(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x10 )
{
sint32 c = p & 0x0F;
sint32 value;
if( c <= 0xC )
{
value = c;
pms->idx++;
}
else if( c == 0xD )
{
value = *(sint8*)(pms->buffer+pms->idx+1);
pms->idx += 2;
}
else if( c == 0xE )
{
value = *(sint16*)(pms->buffer+pms->idx+1);
pms->idx += 3;
}
else
{
value = *(sint32*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
// reduce parent
if( pms->stackIndex )
{
while( pms->stackIndex && pms->containerStack[pms->stackIndex-1].subelementsLeft == 1 )
{
pms->containerStack[pms->stackIndex-1].subelementsLeft = 0;
pms->stackIndex--;
}
}
return value;
}
else if( (p&0xF0) == 0x20 )
{
long long value = pym_unpackLongLong(pms);
return (sint32)value;
}
return 0;
}
long long pym_unpackLongLong(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x20 )
{
sint32 c = p & 0x0F;
long long value;
if( c <= 0xC )
{
__debugbreak();
}
else if( c == 0xD )
{
__debugbreak();
}
else if( c == 0xE )
{
__debugbreak();
}
else
{
value = *(signed long long*)(pms->buffer+pms->idx+1);
pms->idx += 9;
}
// reduce parent
if( pms->stackIndex )
{
while( pms->stackIndex && pms->containerStack[pms->stackIndex-1].subelementsLeft == 1 )
{
pms->containerStack[pms->stackIndex-1].subelementsLeft = 0;
pms->stackIndex--;
}
}
return value;
}
else if( (p&0xF0) == 0x10 )
{
long long value = pym_unpackInt(pms);
return value;
}
return 0;
}
sint32 pym_unpackUnicode(pyUnmarshalString_t *pms, sint8 *dst, sint32 limit)
{
// pyUnmarshalString_t *pms
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x50 )
{
sint32 c = p & 0x0F;
sint32 slen;
if( c <= 0xC )
{
slen = c;
pms->idx++;
}
else if( c == 0xD )
{
slen = *(uint8*)(pms->buffer+pms->idx+1);
pms->idx += 2;
}
else if( c == 0xE )
{
slen = *(uint16*)(pms->buffer+pms->idx+1);
pms->idx += 3;
}
else
{
slen = *(uint32*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
// read string data
sint32 rlen = min(slen,limit-1);
for(sint32 i=0; i<rlen; i++)
{
dst[i] = (sint8)pms->buffer[pms->idx+i];
}
dst[rlen] = '\0';
pms->idx += slen;
// reduce parent
if( pms->stackIndex )
{
while( pms->stackIndex && pms->containerStack[pms->stackIndex-1].subelementsLeft == 1 )
{
pms->containerStack[pms->stackIndex-1].subelementsLeft = 0;
pms->stackIndex--;
}
}
return rlen;
}
return -1;
}
float pym_unpackFloat(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( (p&0xF0) == 0x30 )
{
float value;
if( p == 0x31 )
{
value = 1.0f;
pms->idx++;
}
else if( p == 0x3F )
{
value = *(float*)(pms->buffer+pms->idx+1);
pms->idx += 5;
}
else if( p == 0x30 )
{
value = 0.0f;
pms->idx++;
}
else
__debugbreak();
// reduce parent
if( pms->stackIndex )
{
while( pms->stackIndex && pms->containerStack[pms->stackIndex-1].subelementsLeft == 1 )
{
pms->containerStack[pms->stackIndex-1].subelementsLeft = 0;
pms->stackIndex--;
}
}
return value;
}
return 0;
}
bool pym_unpackBool(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
bool ret = false;
if (p == 0x11)
{ ret = true; }
else if (p == 0x10)
{ ret = false; }
else if (p == 0x00) // int 0 ?
{ ret = false; }
else if (p == 0x01) // int 1 ?
{ ret = true; }
else
{ printf("Error unpacking bool\n"); }
pms->idx++;
// reduce parent
if( pms->stackIndex )
{
while( pms->stackIndex && pms->containerStack[pms->stackIndex-1].subelementsLeft == 1 )
{
pms->containerStack[pms->stackIndex-1].subelementsLeft = 0;
pms->stackIndex--;
}
}
return ret;
}
bool pym_unpack_isNoneStruct(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
return p == 0;
}
bool pym_unpackNoneStruct(pyUnmarshalString_t *pms)
{
uint8 p = pms->buffer[pms->idx];
if( p )
return false;
pms->idx++;
return true;
}