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cuberite-2a/squirrel_3_0_1_stable/sqstdlib/sqstdblob.cpp

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/* see copyright notice in squirrel.h */
#include <new>
#include <squirrel.h>
#include <sqstdio.h>
#include <string.h>
#include <sqstdblob.h>
#include "sqstdstream.h"
#include "sqstdblobimpl.h"
#define SQSTD_BLOB_TYPE_TAG (SQSTD_STREAM_TYPE_TAG | 0x00000002)
//Blob
#define SETUP_BLOB(v) \
SQBlob *self = NULL; \
{ if(SQ_FAILED(sq_getinstanceup(v,1,(SQUserPointer*)&self,(SQUserPointer)SQSTD_BLOB_TYPE_TAG))) \
return SQ_ERROR; }
static SQInteger _blob_resize(HSQUIRRELVM v)
{
SETUP_BLOB(v);
SQInteger size;
sq_getinteger(v,2,&size);
if(!self->Resize(size))
return sq_throwerror(v,_SC("resize failed"));
return 0;
}
static void __swap_dword(unsigned int *n)
{
*n=(unsigned int)(((*n&0xFF000000)>>24) |
((*n&0x00FF0000)>>8) |
((*n&0x0000FF00)<<8) |
((*n&0x000000FF)<<24));
}
static void __swap_word(unsigned short *n)
{
*n=(unsigned short)((*n>>8)&0x00FF)| ((*n<<8)&0xFF00);
}
static SQInteger _blob_swap4(HSQUIRRELVM v)
{
SETUP_BLOB(v);
SQInteger num=(self->Len()-(self->Len()%4))>>2;
unsigned int *t=(unsigned int *)self->GetBuf();
for(SQInteger i = 0; i < num; i++) {
__swap_dword(&t[i]);
}
return 0;
}
static SQInteger _blob_swap2(HSQUIRRELVM v)
{
SETUP_BLOB(v);
SQInteger num=(self->Len()-(self->Len()%2))>>1;
unsigned short *t = (unsigned short *)self->GetBuf();
for(SQInteger i = 0; i < num; i++) {
__swap_word(&t[i]);
}
return 0;
}
static SQInteger _blob__set(HSQUIRRELVM v)
{
SETUP_BLOB(v);
SQInteger idx,val;
sq_getinteger(v,2,&idx);
sq_getinteger(v,3,&val);
if(idx < 0 || idx >= self->Len())
return sq_throwerror(v,_SC("index out of range"));
((unsigned char *)self->GetBuf())[idx] = (unsigned char) val;
sq_push(v,3);
return 1;
}
static SQInteger _blob__get(HSQUIRRELVM v)
{
SETUP_BLOB(v);
SQInteger idx;
sq_getinteger(v,2,&idx);
if(idx < 0 || idx >= self->Len())
return sq_throwerror(v,_SC("index out of range"));
sq_pushinteger(v,((unsigned char *)self->GetBuf())[idx]);
return 1;
}
static SQInteger _blob__nexti(HSQUIRRELVM v)
{
SETUP_BLOB(v);
if(sq_gettype(v,2) == OT_NULL) {
sq_pushinteger(v, 0);
return 1;
}
SQInteger idx;
if(SQ_SUCCEEDED(sq_getinteger(v, 2, &idx))) {
if(idx+1 < self->Len()) {
sq_pushinteger(v, idx+1);
return 1;
}
sq_pushnull(v);
return 1;
}
return sq_throwerror(v,_SC("internal error (_nexti) wrong argument type"));
}
static SQInteger _blob__typeof(HSQUIRRELVM v)
{
sq_pushstring(v,_SC("blob"),-1);
return 1;
}
static SQInteger _blob_releasehook(SQUserPointer p, SQInteger size)
{
SQBlob *self = (SQBlob*)p;
self->~SQBlob();
sq_free(self,sizeof(SQBlob));
return 1;
}
static SQInteger _blob_constructor(HSQUIRRELVM v)
{
SQInteger nparam = sq_gettop(v);
SQInteger size = 0;
if(nparam == 2) {
sq_getinteger(v, 2, &size);
}
if(size < 0) return sq_throwerror(v, _SC("cannot create blob with negative size"));
//SQBlob *b = new SQBlob(size);
SQBlob *b = new (sq_malloc(sizeof(SQBlob)))SQBlob(size);
if(SQ_FAILED(sq_setinstanceup(v,1,b))) {
b->~SQBlob();
sq_free(b,sizeof(SQBlob));
return sq_throwerror(v, _SC("cannot create blob"));
}
sq_setreleasehook(v,1,_blob_releasehook);
return 0;
}
static SQInteger _blob__cloned(HSQUIRRELVM v)
{
SQBlob *other = NULL;
{
if(SQ_FAILED(sq_getinstanceup(v,2,(SQUserPointer*)&other,(SQUserPointer)SQSTD_BLOB_TYPE_TAG)))
return SQ_ERROR;
}
//SQBlob *thisone = new SQBlob(other->Len());
SQBlob *thisone = new (sq_malloc(sizeof(SQBlob)))SQBlob(other->Len());
memcpy(thisone->GetBuf(),other->GetBuf(),thisone->Len());
if(SQ_FAILED(sq_setinstanceup(v,1,thisone))) {
thisone->~SQBlob();
sq_free(thisone,sizeof(SQBlob));
return sq_throwerror(v, _SC("cannot clone blob"));
}
sq_setreleasehook(v,1,_blob_releasehook);
return 0;
}
#define _DECL_BLOB_FUNC(name,nparams,typecheck) {_SC(#name),_blob_##name,nparams,typecheck}
static SQRegFunction _blob_methods[] = {
_DECL_BLOB_FUNC(constructor,-1,_SC("xn")),
_DECL_BLOB_FUNC(resize,2,_SC("xn")),
_DECL_BLOB_FUNC(swap2,1,_SC("x")),
_DECL_BLOB_FUNC(swap4,1,_SC("x")),
_DECL_BLOB_FUNC(_set,3,_SC("xnn")),
_DECL_BLOB_FUNC(_get,2,_SC("xn")),
_DECL_BLOB_FUNC(_typeof,1,_SC("x")),
_DECL_BLOB_FUNC(_nexti,2,_SC("x")),
_DECL_BLOB_FUNC(_cloned,2,_SC("xx")),
{0,0,0,0}
};
//GLOBAL FUNCTIONS
static SQInteger _g_blob_casti2f(HSQUIRRELVM v)
{
SQInteger i;
sq_getinteger(v,2,&i);
sq_pushfloat(v,*((SQFloat *)&i));
return 1;
}
static SQInteger _g_blob_castf2i(HSQUIRRELVM v)
{
SQFloat f;
sq_getfloat(v,2,&f);
sq_pushinteger(v,*((SQInteger *)&f));
return 1;
}
static SQInteger _g_blob_swap2(HSQUIRRELVM v)
{
SQInteger i;
sq_getinteger(v,2,&i);
short s=(short)i;
sq_pushinteger(v,(s<<8)|((s>>8)&0x00FF));
return 1;
}
static SQInteger _g_blob_swap4(HSQUIRRELVM v)
{
SQInteger i;
sq_getinteger(v,2,&i);
unsigned int t4 = (unsigned int)i;
__swap_dword(&t4);
sq_pushinteger(v,(SQInteger)t4);
return 1;
}
static SQInteger _g_blob_swapfloat(HSQUIRRELVM v)
{
SQFloat f;
sq_getfloat(v,2,&f);
__swap_dword((unsigned int *)&f);
sq_pushfloat(v,f);
return 1;
}
#define _DECL_GLOBALBLOB_FUNC(name,nparams,typecheck) {_SC(#name),_g_blob_##name,nparams,typecheck}
static SQRegFunction bloblib_funcs[]={
_DECL_GLOBALBLOB_FUNC(casti2f,2,_SC(".n")),
_DECL_GLOBALBLOB_FUNC(castf2i,2,_SC(".n")),
_DECL_GLOBALBLOB_FUNC(swap2,2,_SC(".n")),
_DECL_GLOBALBLOB_FUNC(swap4,2,_SC(".n")),
_DECL_GLOBALBLOB_FUNC(swapfloat,2,_SC(".n")),
{0,0}
};
SQRESULT sqstd_getblob(HSQUIRRELVM v,SQInteger idx,SQUserPointer *ptr)
{
SQBlob *blob;
if(SQ_FAILED(sq_getinstanceup(v,idx,(SQUserPointer *)&blob,(SQUserPointer)SQSTD_BLOB_TYPE_TAG)))
return -1;
*ptr = blob->GetBuf();
return SQ_OK;
}
SQInteger sqstd_getblobsize(HSQUIRRELVM v,SQInteger idx)
{
SQBlob *blob;
if(SQ_FAILED(sq_getinstanceup(v,idx,(SQUserPointer *)&blob,(SQUserPointer)SQSTD_BLOB_TYPE_TAG)))
return -1;
return blob->Len();
}
SQUserPointer sqstd_createblob(HSQUIRRELVM v, SQInteger size)
{
SQInteger top = sq_gettop(v);
sq_pushregistrytable(v);
sq_pushstring(v,_SC("std_blob"),-1);
if(SQ_SUCCEEDED(sq_get(v,-2))) {
sq_remove(v,-2); //removes the registry
sq_push(v,1); // push the this
sq_pushinteger(v,size); //size
SQBlob *blob = NULL;
if(SQ_SUCCEEDED(sq_call(v,2,SQTrue,SQFalse))
&& SQ_SUCCEEDED(sq_getinstanceup(v,-1,(SQUserPointer *)&blob,(SQUserPointer)SQSTD_BLOB_TYPE_TAG))) {
sq_remove(v,-2);
return blob->GetBuf();
}
}
sq_settop(v,top);
return NULL;
}
SQRESULT sqstd_register_bloblib(HSQUIRRELVM v)
{
return declare_stream(v,_SC("blob"),(SQUserPointer)SQSTD_BLOB_TYPE_TAG,_SC("std_blob"),_blob_methods,bloblib_funcs);
}