bool CompileRepeatPreWhileOrUntil(int column, int param)
{
BlockStack_Write(0, g_pCompilerData->obj_ptr); // set 'next'/reverse address
if (!CompileExpression()) // compile pre-while/until expression
{
return false;
}
if (!g_pElementizer->GetElement(type_end))
{
return false;
}
if (!EnterObj((unsigned char)(param & 0xFF))) // enter the passed in bytecode (jz or jnz)
{
return false;
}
if (!BlockStack_CompileAddress(1)) // compile forward address
{
return false;
}
if (!CompileBlock(column)) // compile repeat-while/until block
{
return false;
}
if (!EnterObj(0x04)) // (jmp)
{
return false;
}
if (!BlockStack_CompileAddress(0)) // compile reverse address
{
return false;
}
BlockStack_Write(1, g_pCompilerData->obj_ptr); // set 'quit'/forward address
return true;
}
bool CompileIfOrIfNot_FinalJmp(int& addressCount)
{
if (!EnterObj(0x04)) // jmp
{
return false;
}
if (!BlockStack_CompileAddress(0))
{
return false;
}
BlockStack_Write(addressCount, g_pCompilerData->obj_ptr);
addressCount++;
return true;
}
bool CompileRepeatCount(int column, int param)
{
param = param; // stop warning
if (!CompileExpression()) // compile count expression
{
return false;
}
if (!g_pElementizer->GetElement(type_end))
{
return false;
}
if (!EnterObj(0x08)) // (tjz)
{
return false;
}
if (!BlockStack_CompileAddress(1)) // compile forward address
{
return false;
}
BlockStack_Write(2, g_pCompilerData->obj_ptr); // set reverse address
if (!CompileBlock(column)) // compile repeat-count block
{
return false;
}
BlockStack_Write(0, g_pCompilerData->obj_ptr); // set 'next' address
if (!EnterObj(0x09)) // (djnz)
{
return false;
}
if (!BlockStack_CompileAddress(2)) // compile reverse address
{
return false;
}
BlockStack_Write(1, g_pCompilerData->obj_ptr); // set 'quit'/forward address
return true;
}
bool CompileTopBlock()
{
g_pCompilerData->bnest_ptr = 0;
g_pCompilerData->bstack_ptr = 0;
StringConstant_PreProcess();
if (!CompileBlock(0))
{
return false;
}
// enter a return into obj
if (!EnterObj(0x32)) // 0x32 = 00110010b
{
return false;
}
return StringConstant_PostProcess();
}
bool CompileIfOrIfNot_Condition(int& addressCount, unsigned char byteCode)
{
if (!CompileExpression())
{
return false;
}
if (!g_pElementizer->GetElement(type_end))
{
return false;
}
if (!EnterObj(byteCode))
{
return false;
}
if (!BlockStack_CompileAddress(addressCount))
{
return false;
}
return true;
}
bool CompileRepeatPlain(int column, int param)
{
param = param; // stop warning
BlockStack_Write(2, g_pCompilerData->obj_ptr); // set revearse address
if (!s_bHasPost)
{
BlockStack_Write(0, g_pCompilerData->obj_ptr); // set plain 'next' address
}
if (!CompileBlock(column))
{
return false;
}
bool bEof = false;
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
unsigned char byteCode = 0x04;
if (!bEof)
{
s_column = g_pElementizer->GetColumn();
if (s_column < column)
{
g_pElementizer->Backup();
}
else
{
// check for post while or until
int postType = g_pElementizer->GetType();
if ((postType == type_while) ||
(postType == type_until))
{
s_bHasPost = true;
BlockStack_Write(0, g_pCompilerData->obj_ptr); // set post-while/until 'next' address
if (!CompileExpression()) // compile post-while/until expression
{
return false;
}
if (!g_pElementizer->GetElement(type_end))
{
return false;
}
byteCode = (postType == type_while) ? 0x0B : 0x0A;
}
else
{
g_pElementizer->Backup();
}
}
}
if (!EnterObj(byteCode))
{
return false;
}
if (!BlockStack_CompileAddress(2)) // compile reverse address
{
return false;
}
BlockStack_Write(1, g_pCompilerData->obj_ptr); // set 'quit' address
return true;
}
bool CompileCase(int column, int param)
{
param = param; // stop warning
if (!BlockStack_CompileConstant())
{
return false;
}
if (!CompileExpression())
{
return false;
}
if (!g_pElementizer->GetElement(type_end))
{
return false;
}
int savedSourcePtr = g_pElementizer->GetSourcePtr();
int otherSourcePtr = 0;
bool bOther = false;
int caseCount = 0;
bool bEof = false;
while (!bEof)
{
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
if (bEof)
{
break;
}
if (g_pElementizer->GetType() == type_end)
{
continue;
}
s_column = g_pElementizer->GetColumn();
g_pElementizer->Backup();
if (s_column <= column)
{
break;
}
if (bOther) // if we have OTHER: it should have been the last case, so we shouldn't get here again
{
g_pCompilerData->error = true;
g_pCompilerData->error_msg = g_pErrorStrings[error_omblc];
return false;
}
if (g_pElementizer->GetType() == type_other)
{
bOther = true;
if (!g_pElementizer->GetNext(bEof)) // get/skip 'other'
{
return false;
}
otherSourcePtr = g_pCompilerData->source_start; // save the pointer to the beginning of 'other'
}
else
{
caseCount++;
if (caseCount > case_limit)
{
g_pCompilerData->error = true;
g_pCompilerData->error_msg = g_pErrorStrings[error_loxce];
return false;
}
while (1)
{
bool bRange = false;
if (!CompileRange(bRange))
{
return false;
}
if (!EnterObj(bRange ? 0x0E : 0x0D)) // enter bytecode for case range or case value into obj
{
return false;
}
if (!BlockStack_CompileAddress(caseCount))
{
return false;
}
if (!g_pElementizer->CheckElement(type_comma))
{
break;
}
}
}
if (!g_pElementizer->GetElement(type_colon))
{
return false;
}
if (!SkipBlock(s_column))
{
return false;
}
}
if (caseCount == 0)
{
g_pCompilerData->error = true;
g_pCompilerData->error_msg = g_pErrorStrings[error_nce];
return false;
}
if (bOther)
{
// set the source pointer to where the OTHER is at, then get it to set the column
g_pElementizer->SetSourcePtr(otherSourcePtr);
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
int new_column = g_pElementizer->GetColumn();
// skip the colon
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
if (!CompileBlock(new_column))
{
return false;
}
}
if (!EnterObj(0x0C)) // casedone, end of range checks
{
return false;
}
g_pElementizer->SetSourcePtr(savedSourcePtr);
caseCount = 0;
bOther = false;
bEof = false;
while(!bEof)
{
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
if (bEof)
{
break;
}
if (g_pElementizer->GetType() == type_end)
{
continue;
}
s_column = g_pElementizer->GetColumn();
g_pElementizer->Backup();
if (s_column <= column)
{
break;
}
if (g_pElementizer->GetType() == type_other)
{
// skip over other, already compiled
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
if (!g_pElementizer->GetNext(bEof))
{
return false;
}
if (!SkipBlock(s_column))
{
return false;
}
}
else
{
// skip over range/values(s), allready compiled
while (1)
{
if (!SkipRange())
{
return false;
}
if (!g_pElementizer->CheckElement(type_comma))
{
break;
}
}
caseCount++;
BlockStack_Write(caseCount, g_pCompilerData->obj_ptr);
if (!g_pElementizer->GetElement(type_colon))
{
return false;
}
if (!CompileBlock(s_column))
{
return false;
}
if (!EnterObj(0x0C)) // casedone
{
return false;
}
}
}
BlockStack_Write(0, g_pCompilerData->obj_ptr);
return true;
}
bool CompileVariable(unsigned char vOperation, unsigned char vOperator, unsigned char type, unsigned char size, int address, int indexSourcePtr)
{
// compile and index(s)
if (type != type_reg)
{
if (type == type_spr || type == type_size)
{
if (!CompileOutOfSequenceExpression(address))
{
return false;
}
}
if (type != type_spr)
{
if (indexSourcePtr != 0)
{
if (!CompileOutOfSequenceExpression(indexSourcePtr))
{
return false;
}
}
}
}
unsigned char byteCode = 0;
if (type == type_spr)
{
byteCode = 0x24 | vOperation;
}
else if (type == type_reg)
{
byteCode = 0x3F;
if (size != 2)
{
bool bRange = false;
if (!CompileOutOfSequenceRange(indexSourcePtr, bRange))
{
return false;
}
if (bRange)
{
byteCode = 0x3E;
}
else
{
byteCode = 0x3D;
}
}
if (!EnterObj(byteCode))
{
return false;
}
// byteCode = 1 in high bit, bottom 2 bits of vOperation in next two bits, then bottom 5 bits of address
byteCode = 0x80 | ((vOperation & 3) << 5) | (address & 0x1F);
}
else
{
if ((type != type_var_byte && type != type_loc_byte) || size != 2 || address >= 8*4 || indexSourcePtr != 0)
{
// not compact
byteCode = 0x80 | (size << 5);
if (indexSourcePtr != 0)
{
byteCode |= 0x10;
}
byteCode |= vOperation;
if (type != type_size)
{
if (type == type_dat_byte)
{
byteCode += 4;
}
else if (type == type_var_byte)
{
byteCode += 8;
}
else if (type == type_loc_byte)
{
byteCode += 12;
}
else
{
g_pCompilerData->error = true;
g_pCompilerData->error_msg = g_pErrorStrings[error_internal];
return false;
}
if (!EnterObj(byteCode))
{
return false;
}
if (address > 0x7F)
{
// two byte address
byteCode = (unsigned char)(address >> 8) | 0x80;
if (!EnterObj(byteCode))
{
return false;
}
}
byteCode = (unsigned char)address;
}
}
