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SqMod/external/Squirrel/Lib/sqstdstream.cpp

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/* see copyright notice in squirrel.h */
#include <new>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <squirrel.h>
#include <sqstdio.h>
#include <sqstdblob.h>
#include "sqstdstream.h"
#include "sqstdblobimpl.h"
#define SETUP_STREAM(v) \
SQStream *self = NULL; \
if(SQ_FAILED(sq_getinstanceup(v,1,(SQUserPointer*)&self,(SQUserPointer)((SQUnsignedInteger)SQSTD_STREAM_TYPE_TAG)))) \
return sq_throwerror(v,_SC("invalid type tag")); \
if(!self || !self->IsValid()) \
return sq_throwerror(v,_SC("the stream is invalid"));
SQInteger _stream_readblob(HSQUIRRELVM v)
{
SETUP_STREAM(v);
SQUserPointer data,blobp;
SQInteger size,res;
sq_getinteger(v,2,&size);
if(size > self->Len()) {
size = self->Len();
}
data = sq_getscratchpad(v,size);
res = self->Read(data,size);
if(res <= 0)
return sq_throwerror(v,_SC("no data left to read"));
blobp = sqstd_createblob(v,res);
memcpy(blobp,data,res);
return 1;
}
#define SAFE_READN(ptr,len) { \
if(self->Read(ptr,len) != len) return sq_throwerror(v,_SC("io error")); \
}
SQInteger _stream_readn(HSQUIRRELVM v)
{
SETUP_STREAM(v);
SQInteger format;
sq_getinteger(v, 2, &format);
switch(format) {
case 'l': {
SQInteger i;
SAFE_READN(&i, sizeof(i));
sq_pushinteger(v, i);
}
break;
case 'i': {
SQInt32 i;
SAFE_READN(&i, sizeof(i));
sq_pushinteger(v, i);
}
break;
case 's': {
short s;
SAFE_READN(&s, sizeof(short));
sq_pushinteger(v, s);
}
break;
case 'w': {
unsigned short w;
SAFE_READN(&w, sizeof(unsigned short));
sq_pushinteger(v, w);
}
break;
case 'c': {
char c;
SAFE_READN(&c, sizeof(char));
sq_pushinteger(v, c);
}
break;
case 'b': {
unsigned char c;
SAFE_READN(&c, sizeof(unsigned char));
sq_pushinteger(v, c);
}
break;
case 'f': {
float f;
SAFE_READN(&f, sizeof(float));
sq_pushfloat(v, f);
}
break;
case 'd': {
double d;
SAFE_READN(&d, sizeof(double));
sq_pushfloat(v, (SQFloat)d);
}
break;
default:
return sq_throwerror(v, _SC("invalid format"));
}
return 1;
}
SQInteger _stream_writeblob(HSQUIRRELVM v)
{
SQUserPointer data;
SQInteger size;
SETUP_STREAM(v);
if(SQ_FAILED(sqstd_getblob(v,2,&data)))
return sq_throwerror(v,_SC("invalid parameter"));
size = sqstd_getblobsize(v,2);
if(self->Write(data,size) != size)
return sq_throwerror(v,_SC("io error"));
sq_pushinteger(v,size);
return 1;
}
SQInteger _stream_writen(HSQUIRRELVM v)
{
SETUP_STREAM(v);
SQInteger format, ti;
SQFloat tf;
sq_getinteger(v, 3, &format);
switch(format) {
case 'l': {
SQInteger i;
sq_getinteger(v, 2, &ti);
i = ti;
self->Write(&i, sizeof(SQInteger));
}
break;
case 'i': {
SQInt32 i;
sq_getinteger(v, 2, &ti);
i = (SQInt32)ti;
self->Write(&i, sizeof(SQInt32));
}
break;
case 's': {
short s;
sq_getinteger(v, 2, &ti);
s = (short)ti;
self->Write(&s, sizeof(short));
}
break;
case 'w': {
unsigned short w;
sq_getinteger(v, 2, &ti);
w = (unsigned short)ti;
self->Write(&w, sizeof(unsigned short));
}
break;
case 'c': {
char c;
sq_getinteger(v, 2, &ti);
c = (char)ti;
self->Write(&c, sizeof(char));
}
break;
case 'b': {
unsigned char b;
sq_getinteger(v, 2, &ti);
b = (unsigned char)ti;
self->Write(&b, sizeof(unsigned char));
}
break;
case 'f': {
float f;
sq_getfloat(v, 2, &tf);
f = (float)tf;
self->Write(&f, sizeof(float));
}
break;
case 'd': {
double d;
sq_getfloat(v, 2, &tf);
d = tf;
self->Write(&d, sizeof(double));
}
break;
default:
return sq_throwerror(v, _SC("invalid format"));
}
return 0;
}
SQInteger _stream_seek(HSQUIRRELVM v)
{
SETUP_STREAM(v);
SQInteger offset, origin = SQ_SEEK_SET;
sq_getinteger(v, 2, &offset);
if(sq_gettop(v) > 2) {
SQInteger t;
sq_getinteger(v, 3, &t);
switch(t) {
case 'b': origin = SQ_SEEK_SET; break;
case 'c': origin = SQ_SEEK_CUR; break;
case 'e': origin = SQ_SEEK_END; break;
default: return sq_throwerror(v,_SC("invalid origin"));
}
}
sq_pushinteger(v, self->Seek(offset, origin));
return 1;
}
SQInteger _stream_tell(HSQUIRRELVM v)
{
SETUP_STREAM(v);
sq_pushinteger(v, self->Tell());
return 1;
}
SQInteger _stream_len(HSQUIRRELVM v)
{
SETUP_STREAM(v);
sq_pushinteger(v, self->Len());
return 1;
}
SQInteger _stream_flush(HSQUIRRELVM v)
{
SETUP_STREAM(v);
if(!self->Flush())
sq_pushinteger(v, 1);
else
sq_pushnull(v);
return 1;
}
SQInteger _stream_eos(HSQUIRRELVM v)
{
SETUP_STREAM(v);
if(self->EOS())
sq_pushinteger(v, 1);
else
sq_pushnull(v);
return 1;
}
SQInteger _stream__cloned(HSQUIRRELVM v)
{
return sq_throwerror(v,_SC("this object cannot be cloned"));
}
static const SQRegFunction _stream_methods[] = {
_DECL_STREAM_FUNC(readblob,2,_SC("xn")),
_DECL_STREAM_FUNC(readn,2,_SC("xn")),
_DECL_STREAM_FUNC(writeblob,-2,_SC("xx")),
_DECL_STREAM_FUNC(writen,3,_SC("xnn")),
_DECL_STREAM_FUNC(seek,-2,_SC("xnn")),
_DECL_STREAM_FUNC(tell,1,_SC("x")),
_DECL_STREAM_FUNC(len,1,_SC("x")),
_DECL_STREAM_FUNC(eos,1,_SC("x")),
_DECL_STREAM_FUNC(flush,1,_SC("x")),
_DECL_STREAM_FUNC(_cloned,0,NULL),
{NULL,(SQFUNCTION)0,0,NULL}
};
void init_streamclass(HSQUIRRELVM v)
{
sq_pushregistrytable(v);
sq_pushstring(v,_SC("std_stream"),-1);
if(SQ_FAILED(sq_get(v,-2))) {
sq_pushstring(v,_SC("std_stream"),-1);
sq_newclass(v,SQFalse);
sq_settypetag(v,-1,(SQUserPointer)((SQUnsignedInteger)SQSTD_STREAM_TYPE_TAG));
SQInteger i = 0;
while(_stream_methods[i].name != 0) {
const SQRegFunction &f = _stream_methods[i];
sq_pushstring(v,f.name,-1);
sq_newclosure(v,f.f,0);
sq_setparamscheck(v,f.nparamscheck,f.typemask);
sq_newslot(v,-3,SQFalse);
i++;
}
sq_newslot(v,-3,SQFalse);
sq_pushroottable(v);
sq_pushstring(v,_SC("stream"),-1);
sq_pushstring(v,_SC("std_stream"),-1);
sq_get(v,-4);
sq_newslot(v,-3,SQFalse);
sq_pop(v,1);
}
else {
sq_pop(v,1); //result
}
sq_pop(v,1);
}
SQRESULT declare_stream(HSQUIRRELVM v,const SQChar* name,SQUserPointer typetag,const SQChar* reg_name,const SQRegFunction *methods,const SQRegFunction *globals)
{
if(sq_gettype(v,-1) != OT_TABLE)
return sq_throwerror(v,_SC("table expected"));
SQInteger top = sq_gettop(v);
//create delegate
init_streamclass(v);
sq_pushregistrytable(v);
sq_pushstring(v,reg_name,-1);
sq_pushstring(v,_SC("std_stream"),-1);
if(SQ_SUCCEEDED(sq_get(v,-3))) {
sq_newclass(v,SQTrue);
sq_settypetag(v,-1,typetag);
SQInteger i = 0;
while(methods[i].name != 0) {
const SQRegFunction &f = methods[i];
sq_pushstring(v,f.name,-1);
sq_newclosure(v,f.f,0);
sq_setparamscheck(v,f.nparamscheck,f.typemask);
sq_setnativeclosurename(v,-1,f.name);
sq_newslot(v,-3,SQFalse);
i++;
}
sq_newslot(v,-3,SQFalse);
sq_pop(v,1);
i = 0;
while(globals[i].name!=0)
{
const SQRegFunction &f = globals[i];
sq_pushstring(v,f.name,-1);
sq_newclosure(v,f.f,0);
sq_setparamscheck(v,f.nparamscheck,f.typemask);
sq_setnativeclosurename(v,-1,f.name);
sq_newslot(v,-3,SQFalse);
i++;
}
//register the class in the target table
sq_pushstring(v,name,-1);
sq_pushregistrytable(v);
sq_pushstring(v,reg_name,-1);
sq_get(v,-2);
sq_remove(v,-2);
sq_newslot(v,-3,SQFalse);
sq_settop(v,top);
return SQ_OK;
}
sq_settop(v,top);
return SQ_ERROR;
}
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