mpw/toolbox/rm.cpp

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#include "rm.h"
#include <cpu/defs.h>
#include <cpu/CpuModule.h>
#include <cpu/fmem.h>
#include <string>
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namespace
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{
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uint32_t PopLong()
{
uint32_t sp = cpuGetAReg(7);
uint32_t value = memoryReadLong(sp);
cpuSetAReg(7, sp + 4);
return value;
}
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uint16_t PopWord()
{
uint32_t sp = cpuGetAReg(7);
uint16_t value = memoryReadWord(sp);
cpuSetAReg(7, sp + 2);
return value;
}
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uint32_t StackFrame(uint32_t &b, uint32_t &a)
{
uint32_t sp = cpuGetAReg(7);
a = memoryReadLong(sp); sp += 4;
b = memoryReadLong(sp); sp += 4;
cpuSetAReg(7, sp);
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return sp;
}
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void ToolReturn(uint32_t sp, uint32_t value)
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{
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memoryWriteLong(sp, value);
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}
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std::string PString(uint32_t address)
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{
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std::string s;
unsigned length = address == 0 ? 0 : memoryReadByte(address++);
if (length == 0)
{
return s;
}
s.reserve(length);
for (unsigned i = 0; i < length; ++i)
{
s.push_back((char)memoryReadByte(address++));
}
return s;
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}
}
namespace RM
{
uint16_t Get1NamedResource()
{
// Get1NamedResource (theType: ResType; name: Str255) : Handle;
/*
* -----------
* +8 outHandle
* ------------
* +4 theType
* ------------
* +0 name
* ------------
*
*/
// nb - return address is not on the stack.
uint32_t sp;
uint32_t theType;
uint32_t name;
sp = StackFrame(theType, name);
std::string sname = PString(name);
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fprintf(stderr, "Get1NamedResource(%08x, %s)\n", theType, sname.c_str());
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ToolReturn(sp, (uint32_t)0);
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return -192;
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}
}