mirror of https://github.com/ksherlock/mpw.git
112 lines
2.2 KiB
C++
112 lines
2.2 KiB
C++
#include "utility.h"
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#include "toolbox.h"
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#include "mm.h"
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#include "rm.h"
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#include <cpu/defs.h>
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#include <cpu/CpuModule.h>
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#include <cpu/fmem.h>
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#include "stackframe.h"
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using ToolBox::Log;
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namespace Utility {
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// FUNCTION NewString (theString: Str255): StringHandle;
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uint16_t NewString(uint16_t trap)
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{
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/*
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* NewString allocates the specified string as a relocatable object
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* in the heap and returns a handle to it.
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*/
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uint32_t theString;
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uint32_t theHandle;
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uint32_t sp;
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uint32_t length = 0;
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uint32_t d0;
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std::string s;
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sp = StackFrame<4>(theString);
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s = ToolBox::ReadPString(theString);
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Log("%04x NewString(%s)\n", trap, s.c_str());
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length = s.length() + 1;
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// if (length) // always true...
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{
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uint32_t ptr;
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d0 = MM::Native::NewHandle(s.length(), false, theHandle, ptr);
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if (!d0)
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{
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ToolBox::WritePString(ptr, s);
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}
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}
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ToolReturn<4>(sp, theHandle);
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return d0;
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}
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// FUNCTION GetString (stringID: Integer): StringHandle;
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uint16_t GetString(uint16_t trap)
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{
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/*
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* The GetString function loads a string from a string ('STR ')
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* resource into memory. It returns a handle to the string with the
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* specified resource ID, reading it from the resource file if
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* necessary.
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*/
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uint16_t stringID;
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uint32_t sp;
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uint32_t d0;
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uint32_t theHandle;
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sp = StackFrame<2>(stringID);
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Log("%04x GetString($%04x)\n", trap, stringID);
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d0 = RM::Native::GetResource(0x53545220, stringID, theHandle);
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ToolReturn<4>(sp, theHandle);
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return d0;
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}
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// FUNCTION BitTst (bytePtr: Ptr; bitNum: LONGINT) : BOOLEAN;
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uint16_t BitTst(uint16_t trap)
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{
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/*
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* BitTst tests whether a given bit is set and returns TRUE if so or
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* FALSE if not. The bit is specified by bitNum, an offset from the
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* high-order bit of the byte pointed to by bytePtr.
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*/
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uint32_t bytePtr;
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uint32_t bitNum;
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uint16_t rv;
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uint32_t sp;
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sp = StackFrame<8>(bytePtr, bitNum);
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Log("%04x BitTst($%08x, $%08x)\n", trap, bytePtr, bitNum);
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uint32_t offset = bitNum >> 3;
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int mask = 0x80 >> (bitNum & 0x07);
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uint32_t value = memoryReadByte(bytePtr + offset);
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rv = value & mask ? 1 : 0;
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ToolReturn<2>(sp, rv);
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return 0;
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}
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}
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