mpw/toolbox/utility.cpp

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/*
* Copyright (c) 2013, Kelvin W Sherlock
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
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*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
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*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
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#include "utility.h"
#include "toolbox.h"
#include "mm.h"
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#include "rm.h"
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#include <cpu/defs.h>
#include <cpu/CpuModule.h>
#include <cpu/fmem.h>
#include "stackframe.h"
using ToolBox::Log;
namespace Utility {
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// FUNCTION NewString (theString: Str255): StringHandle;
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uint16_t NewString(uint16_t trap)
{
/*
* NewString allocates the specified string as a relocatable object
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* in the heap and returns a handle to it.
*/
uint32_t theString;
uint32_t theHandle;
uint32_t sp;
uint32_t length = 0;
uint32_t d0;
std::string s;
sp = StackFrame<4>(theString);
s = ToolBox::ReadPString(theString);
Log("%04x NewString(%s)\n", trap, s.c_str());
length = s.length() + 1;
// if (length) // always true...
{
uint32_t ptr;
d0 = MM::Native::NewHandle(s.length(), false, theHandle, ptr);
if (!d0)
{
ToolBox::WritePString(ptr, s);
}
}
ToolReturn<4>(sp, theHandle);
return d0;
}
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// FUNCTION GetString (stringID: Integer): StringHandle;
uint16_t GetString(uint16_t trap)
{
/*
* The GetString function loads a string from a string ('STR ')
* resource into memory. It returns a handle to the string with the
* specified resource ID, reading it from the resource file if
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* necessary.
*/
uint16_t stringID;
uint32_t sp;
uint32_t d0;
uint32_t theHandle;
sp = StackFrame<2>(stringID);
Log("%04x GetString($%04x)\n", trap, stringID);
d0 = RM::Native::GetResource(0x53545220, stringID, theHandle);
ToolReturn<4>(sp, theHandle);
return d0;
}
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// FUNCTION BitTst (bytePtr: Ptr; bitNum: LONGINT) : BOOLEAN;
uint16_t BitTst(uint16_t trap)
{
/*
* BitTst tests whether a given bit is set and returns TRUE if so or
* FALSE if not. The bit is specified by bitNum, an offset from the
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* high-order bit of the byte pointed to by bytePtr.
*/
uint32_t bytePtr;
uint32_t bitNum;
uint16_t rv;
uint32_t sp;
sp = StackFrame<8>(bytePtr, bitNum);
Log("%04x BitTst($%08x, $%08x)\n", trap, bytePtr, bitNum);
uint32_t offset = bitNum >> 3;
int mask = 0x80 >> (bitNum & 0x07);
uint32_t value = memoryReadByte(bytePtr + offset);
rv = value & mask ? 1 : 0;
ToolReturn<2>(sp, rv);
return 0;
}
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}