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mpw/toolbox/os.cpp
Kelvin Sherlock 2c3388f76a SetFileDates (create / mod / backup)
2014-12-26 16:31:58 -05:00

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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:
*
* 1. Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* 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.
*
* 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.
*
*/
#include <cerrno>
#include <cctype>
#include <ctime>
#include <algorithm>
#include <chrono>
#include <deque>
#include <string>
#include <sys/xattr.h>
#include <sys/stat.h>
#include <sys/paths.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <strings.h>
#include <cpu/defs.h>
#include <cpu/CpuModule.h>
#include <cpu/fmem.h>
#include <macos/sysequ.h>
#include <macos/errors.h>
#include "os.h"
#include "os_internal.h"
#include "toolbox.h"
#include "stackframe.h"
#include "fs_spec.h"
using ToolBox::Log;
using MacOS::macos_error_from_errno;
namespace {
using namespace OS;
// time stuff.
const long EpochAdjust = 86400 * (365 * (1970 - 1904) + 17); // 17 leap years.
std::chrono::time_point<std::chrono::steady_clock> BootTime;
std::string extension(const std::string &s)
{
std::string tmp;
int pos;
pos = s.find_last_of("./:");
if (pos == s.npos) return tmp;
if (s[pos++] != '.') return tmp;
if (pos >= s.length()) return tmp;
tmp = s.substr(pos);
std::transform(tmp.begin(), tmp.end(), tmp.begin(),
[](char c) { return tolower(c); }
);
return tmp;
}
std::string basename(const std::string &s)
{
int pos = s.find_last_of("/:");
if (pos == s.npos) return s;
return s.substr(pos + 1);
}
}
namespace OS
{
bool Init()
{
BootTime = std::chrono::steady_clock::now();
memoryWriteLong(0, MacOS::Ticks); // 0 ticks since boot.
//std::chrono::system_clock::now(), to_time_t
// set global variable Time to the current time
time_t now = UnixToMac(::time(NULL));
memoryWriteLong(now, MacOS::TimeLM);
return true;
}
// known text file extensions
bool IsTextFile(const std::string &s)
{
// 1. check for a TEXT file type.
{
int rv;
char buffer[32];
rv = ::getxattr(s.c_str(), XATTR_FINDERINFO_NAME, buffer, 32, 0, 0);
if (rv >= 8 && memcmp(buffer, "TEXT", 4) == 0)
return true;
}
std::string ext = extension(s);
if (ext.empty()) return false;
char c = ext[0];
switch(c)
{
case 'a':
if (ext == "aii") // assembler
return true;
if (ext == "asm")
return true;
break;
case 'c':
if (ext == "c")
return true;
if (ext == "cpp")
return true;
break;
case 'e':
if (ext == "equ") // asm iigs include file.
return true;
break;
case 'i':
if (ext == "i") // asmiigs include file
return true;
if (ext == "inc")
return true;
break;
case 'h':
if (ext == "h") // c header
return true;
break;
case 'l':
if (ext == "lst") // asm iigs listing
return true;
break;
case 'm':
if (ext == "macros")
return true;
break;
case 'p':
if (ext == "p") // pascal
return true;
if (ext == "pas") // pascal
return true;
if (ext == "pii") // pascal
return true;
break;
case 'r':
if (ext == "r")
return true;
if (ext == "rez")
return true;
if (ext == "rii") // rez
return true;
break;
case 's':
if (ext == "src") // asm equates
return true;
break;
}
// check for e16.xxxx or m16.xxxx
ext = basename(s);
if (ext.length() > 4)
{
switch (ext[0])
{
case 'm':
case 'M':
case 'e':
case 'E':
if (!strncmp("16.", ext.c_str() + 1, 3))
return true;
break;
}
}
return false;
}
// known binary file extensions
bool IsBinaryFile(const std::string &s)
{
// first -- check for a finder info extension.
{
uint8_t buffer[32];
int rv;
rv = ::getxattr(s.c_str(), XATTR_FINDERINFO_NAME, buffer, 32, 0, 0);
if (rv >= 8 && ::memcmp(buffer + 4, "pdos",4) == 0)
{
// Bx__ ?
if (buffer[0] == 'B' && buffer[2] == ' ' && buffer[3] == ' ')
return true;
// "p" $uv $wx $yz
if (buffer[0] == 'p')
{
uint8_t fileType = buffer[1];
//uint16_t auxType = buffer[2] | (buffer[3] << 8);
if (fileType >= 0xb1 && fileType <= 0xbf)
return true;
}
}
}
std::string ext = extension(s);
if (ext.empty()) return false;
char c = ext[0];
switch(c)
{
case 'l':
if (ext == "lib")
return true;
break;
case 'o':
if (ext == "o")
return true;
if (ext == "obj")
return true;
break;
}
return false;
}
uint16_t Close(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x Close(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
int rv = OS::Internal::FDEntry::close(ioRefNum, true);
if (rv < 0) d0 = macos_error_from_errno();
else d0 = 0;
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t Create(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x Create(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint32_t namePtr = memoryReadLong(parm + 18);
//uint16_t ioVRefNum = memoryReadWord(parm + 22);
//uint8_t ioFVersNum = memoryReadByte(parm + 26);
std::string sname = ToolBox::ReadPString(namePtr, true);
if (!sname.length())
{
memoryWriteWord(MacOS::bdNamErr, parm + 16);
return MacOS::bdNamErr;
}
Log(" Create(%s)\n", sname.c_str());
int fd;
fd = ::open(sname.c_str(), O_WRONLY | O_CREAT | O_EXCL, 0666);
if (fd < 0)
{
d0 = macos_error_from_errno();
}
else
{
::close(fd);
d0 = 0;
}
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t OpenCommon(uint32_t parm, bool fsspec, bool resource)
{
enum {
/* IOParam */
_qLink = 0,
_qType = 4,
_ioTrap = 6,
_ioCmdAddr = 8,
_ioCompletion = 12,
_ioResult = 16,
_ioNamePtr = 18,
_ioVRefNum = 22,
_ioRefNum = 24,
_ioVersNum = 26,
_ioPermssn = 27,
_ioMisc = 28,
_ioBuffer = 32,
_ioReqCount = 36,
_ioActCount = 40,
_ioPosMode = 44,
_ioPosOffset = 46,
_ioDirID = 48,
};
uint32_t d0;
int fd;
uint8_t ioPermission = memoryReadByte(parm + _ioPermssn);
uint32_t namePtr = memoryReadLong(parm + _ioNamePtr);
std::string sname = ToolBox::ReadPString(namePtr, true);
if (fsspec)
{
uint32_t ioDirID = memoryReadLong(parm + _ioDirID);
sname = FSSpecManager::ExpandPath(sname, ioDirID);
}
fd = Internal::FDEntry::open(sname, ioPermission, resource);
d0 = fd < 0 ? fd : 0;
if (fd >= 0)
{
memoryWriteWord(fd, parm + _ioRefNum);
}
memoryWriteWord(d0, parm + _ioResult);
return d0;
}
uint16_t Open(uint16_t trap)
{
uint32_t parm = cpuGetAReg(0);
Log("%04x Open(%08x)\n", trap, parm);
return OpenCommon(parm, false, false);
}
uint16_t OpenRF(uint16_t trap)
{
uint32_t parm = cpuGetAReg(0);
Log("%04x Open(%08x)\n", trap, parm);
return OpenCommon(parm, false, true);
}
uint16_t Read(uint16_t trap)
{
uint32_t d0;
int32_t pos;
uint32_t parm = cpuGetAReg(0);
Log("%04x Read(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
uint32_t ioBuffer = memoryReadLong(parm + 32);
int32_t ioReqCount = memoryReadLong(parm + 36);
uint16_t ioPosMode = memoryReadWord(parm + 44);
int32_t ioPosOffset = memoryReadLong(parm + 46);
if (ioReqCount < 0)
{
d0 = MacOS::paramErr;
memoryWriteWord(d0, parm + 16);
return d0;
}
pos = Internal::mac_seek(ioRefNum, ioPosMode, ioPosOffset);
if (pos < 0)
{
d0 = pos;
pos = 0;
memoryWriteLong(pos, parm + 46); // new offset.
memoryWriteWord(d0, parm + 16);
return d0;
}
Log(" read(%04x, %08x, %08x)\n", ioRefNum, ioBuffer, ioReqCount);
ssize_t count = OS::Internal::FDEntry::read(ioRefNum, memoryPointer(ioBuffer), ioReqCount);
if (count >= 0)
{
d0 = 0;
pos += count;
memoryWriteLong(count, parm + 40);
}
if (count == 0)
{
d0 = MacOS::eofErr;
}
if (count < 0)
{
d0 = macos_error_from_errno();
}
memoryWriteLong(pos, parm + 46); // new offset.
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t Write(uint16_t trap)
{
uint32_t d0;
int32_t pos;
uint32_t parm = cpuGetAReg(0);
Log("%04x Write(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
uint32_t ioBuffer = memoryReadLong(parm + 32);
int32_t ioReqCount = memoryReadLong(parm + 36);
uint16_t ioPosMode = memoryReadWord(parm + 44);
int32_t ioPosOffset = memoryReadLong(parm + 46);
if (ioReqCount < 0)
{
d0 = MacOS::paramErr;
memoryWriteWord(d0, parm + 16);
return d0;
}
pos = Internal::mac_seek(ioRefNum, ioPosMode, ioPosOffset);
if (pos < 0)
{
d0 = pos;
pos = 0;
memoryWriteLong(pos, parm + 46); // new offset.
memoryWriteWord(d0, parm + 16);
return d0;
}
Log(" write(%04x, %08x, %08x)\n", ioRefNum, ioBuffer, ioReqCount);
ssize_t count = OS::Internal::FDEntry::write(ioRefNum, memoryPointer(ioBuffer), ioReqCount);
if (count >= 0)
{
d0 = 0;
pos += count;
memoryWriteLong(count, parm + 40);
}
if (count < 0)
{
d0 = macos_error_from_errno();
}
memoryWriteLong(pos, parm + 46); // new offset.
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t Delete(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x Delete(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint32_t namePtr = memoryReadLong(parm + 18);
//uint16_t ioVRefNum = memoryReadWord(parm + 22);
//uint8_t ioFVersNum = memoryReadByte(parm + 26);
std::string sname = ToolBox::ReadPString(namePtr, true);
if (!sname.length())
{
memoryWriteWord(MacOS::bdNamErr, parm + 16);
return MacOS::bdNamErr;
}
Log(" Delete(%s)\n", sname.c_str());
int ok = ::unlink(sname.c_str());
if (ok < 0)
d0 = macos_error_from_errno();
else
d0 = 0;
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t GetEOF(uint16_t trap)
{
uint32_t d0;
size_t size;
uint32_t parm = cpuGetAReg(0);
Log("%04x GetEOF(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
struct stat st;
if (::fstat(ioRefNum, &st) < 0)
{
d0 = macos_error_from_errno();
size = 0;
}
else
{
d0 = 0;
size = st.st_size;
}
memoryWriteWord(d0, parm + 16);
memoryWriteLong(size, parm + 28);
return d0;
}
uint16_t SetEOF(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x SetEOF(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
uint32_t ioMisc = memoryReadLong(parm + 28);
int rv = ::ftruncate(ioRefNum, ioMisc);
d0 = rv < 0 ? macos_error_from_errno() : 0;
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t GetFPos(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x GetFPos(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
int rv = ::lseek(ioRefNum, 0, SEEK_CUR);
if (rv < 0)
{
d0 = macos_error_from_errno();
}
else
{
memoryWriteLong(0, parm + 36); // ioReqCount
memoryWriteLong(0, parm + 40); // ioActCount
memoryWriteWord(0, parm + 44); // ioPosMode
memoryWriteLong(rv, parm + 46); // ioPosOffset
d0 = 0;
}
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t SetFPos(uint16_t trap)
{
uint32_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x SetFPos(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint16_t ioRefNum = memoryReadWord(parm + 24);
uint16_t ioPosMode = memoryReadWord(parm + 44);
int32_t ioPosOffset = memoryReadLong(parm + 46);
ioPosOffset = Internal::mac_seek(ioRefNum, ioPosMode, ioPosOffset);
d0 = 0;
if (ioPosOffset < 0)
{
d0 = ioPosOffset;
ioPosOffset = 0;
}
memoryWriteLong(ioPosOffset, parm + 46); // new offset.
memoryWriteWord(d0, parm + 16);
return d0;
}
uint16_t FlushVol(uint16_t trap)
{
uint32_t parm = cpuGetAReg(0);
Log("%04x FlushVol(%08x)\n", trap, parm);
// ioResult
memoryWriteWord(0, parm + 16);
return 0;
}
// return the name of the default volume.
// this does not translate well.
uint16_t GetVol(uint16_t trap)
{
uint32_t parm = cpuGetAReg(0);
Log("%04x GetVol(%08x)\n", trap, parm);
//uint32_t ioCompletion = memoryReadLong(parm + 12);
uint32_t namePtr = memoryReadLong(parm + 18);
// ioResult
memoryWriteWord(0, parm + 16);
// ioVRefNum
memoryWriteWord(0, parm + 22);
std::string tmp = "MacOS";
ToolBox::WritePString(namePtr, tmp);
return 0;
}
uint16_t SetVol(uint16_t trap)
{
enum { // WDPBRec
_qLink = 0,
_qType = 4,
_ioTrap = 6,
_ioCmdAddr = 8,
_ioCompletion = 12,
_ioResult = 16,
_ioNamePtr = 18,
_ioVRefNum = 22,
_ioWDDirID = 48,
};
uint16_t d0;
uint32_t parm = cpuGetAReg(0);
Log("%04x SetVol(%08x)\n", trap, parm);
uint32_t ioNamePtr = memoryReadLong(parm + _ioNamePtr);
uint32_t ioVRefNum = memoryReadWord(parm + _ioVRefNum);
uint32_t ioWDDirID = trap & 0x0200 ? memoryReadLong(parm + _ioWDDirID) : 0;
std::string name = ToolBox::ReadPString(ioNamePtr);
Log(" SetVol(%s, %d, %d)\n", name.c_str(), ioVRefNum, ioWDDirID);
if (name.length() || ioVRefNum || ioWDDirID)
{
fprintf(stderr, "SetVol(%s, %d, %d) is not supported yet.\n", name.c_str(), ioVRefNum, ioWDDirID);
exit(1);
}
d0 = 0;
memoryWriteWord(d0, parm + _ioResult);
return d0;
}
#pragma mark - String Utilities
uint16_t CmpString(uint16_t trap)
{
/*
* on entry:
* A0 Pointer to first character of first string
* A1 Pointer to first character of second string
* D0 (high) length of first string
* D0 (low) length of second string
*
* on exit:
* D0 0 if strings equal, 1 if strings not equal.
*
*/
bool caseSens = trap & (1 << 9);
//bool diacSens = trap & (1 << 10); // ignore for now...
uint32_t aStr = cpuGetAReg(0);
uint32_t bStr = cpuGetAReg(1);
uint32_t length = cpuGetDReg(0);
uint32_t aLen = (length >> 16);
uint32_t bLen = (length & 0xffff);
std::string a = ToolBox::ReadString(aStr, aLen);
std::string b = ToolBox::ReadString(bStr, bLen);
Log("%04x CmpString(%s, %s)\n", trap, a.c_str(), b.c_str());
if (aLen != bLen) return 1; // different length...
if (aStr == bStr) return 0; // same ptr...
bool eq;
eq = std::equal(
a.begin(),
a.end(),
b.begin(),
[caseSens](char a, char b){
if (!caseSens)
{
a = toupper(a);
b = toupper(b);
}
return a == b;
}
);
return eq ? 0 : 1;
}
#pragma mark - Time Utilities
time_t UnixToMac(time_t t)
{
return t + EpochAdjust;
}
time_t MacToUnix(time_t t)
{
return t - EpochAdjust;
}
uint16_t ReadDateTime(uint16_t trap)
{
/*
* on entry:
* A0 Pointer to long word secs
*
* on exit:
* A0 pointer to long word secs
* D0 Result code
*
*/
time_t now;
uint32_t secsPtr = cpuGetAReg(0);
Log("%04x ReadDateTime(%08x)\n", trap, secsPtr);
now = ::time(NULL);
now = UnixToMac(now);
if (secsPtr) memoryWriteLong(now, secsPtr);
// also set global variable Time.
memoryWriteLong(now, MacOS::TimeLM);
return 0;
}
uint16_t SecondsToDate(uint16_t trap)
{
/*
* on entry:
* D0 Seconds since midnight, January 1, 1904
* A0 pointer to date-time record
*
* on exit:
* D0 Result code
*
*/
uint32_t s = cpuGetDReg(0);
uint32_t dtPtr = cpuGetAReg(0);
Log("%04x SecondsToDate(%08x, %08x)\n", trap, s, dtPtr);
if (dtPtr)
{
struct tm *tm;
time_t t;
t = MacToUnix(s);
tm = ::localtime(&t);
memoryWriteWord(tm->tm_year + 1900, dtPtr + 0);
memoryWriteWord(tm->tm_mon + 1, dtPtr + 2);
memoryWriteWord(tm->tm_mday, dtPtr + 4);
memoryWriteWord(tm->tm_hour, dtPtr + 6);
memoryWriteWord(tm->tm_min, dtPtr + 8);
memoryWriteWord(tm->tm_sec, dtPtr + 10);
memoryWriteWord(tm->tm_wday + 1, dtPtr + 12);
}
return 0;
}
uint16_t TickCount(uint16_t trap)
{
typedef std::chrono::duration<int32_t, std::ratio<1, 60> > ticks;
Log("%04x TickCount()\n", trap);
auto now = std::chrono::steady_clock::now();
uint32_t t = std::chrono::duration_cast< ticks >(now - BootTime).count();
// global Ticks
memoryWriteLong(t, MacOS::Ticks);
ToolReturn<4>(-1, t);
return 0;
}
uint16_t Microseconds(uint16_t trap)
{
// UnsignedWide is a uint64_t
// Microseconds(UnsignedWide * microTickCount)
// FOURWORDINLINE(0xA193, 0x225F, 0x22C8, 0x2280);
uint32_t microTickCount;
StackFrame<4>(microTickCount);
Log("%04x %s(%08x)\n", trap, __func__, microTickCount);
auto now = std::chrono::steady_clock::now();
uint64_t t = std::chrono::duration_cast< std::chrono::microseconds >(now - BootTime).count();
if (microTickCount)
memoryWriteLongLong(t, microTickCount);
return 0;
}
uint16_t Pack6(uint16_t trap)
{
char buffer[256];
int length;
std::string out;
uint32_t dateTime;
uint16_t flag;
uint32_t result;
uint16_t selector;
// todo -- variable number of args. Pop selector, act from that.
StackFrame<12>(dateTime, flag, result, selector);
Log("%04x Pack6(%08x, %04x, %08x, %04x)\n",
trap, dateTime, flag, result, selector);
struct tm *tm;
time_t t;
t = MacToUnix(dateTime);
tm = ::localtime(&t);
if (selector == 0x00)
{
// void IUDateString(long dateTime,DateForm longFlag,Str255 result)
// DateForm doesn't seem to do anything.
// not strictly correct -- uses %d/%d/%2d form.
length = std::strftime(buffer, sizeof(buffer), "%m/%d/%y", tm);
out.assign(buffer, length);
}
else if (selector == 0x02)
{
// void IUTimeString(long dateTime,Boolean wantSeconds,Str255 result)
// output: 12:00:00 AM or 12:00 AM
length = std::strftime(buffer, sizeof(buffer), flag ? "%I:%M:%S %p" : "%I:%M %p", tm);
out.assign(buffer, length);
}
else
{
fprintf(stderr, "Pack6: selector %04x not supported\n", selector);
exit(1);
}
ToolBox::WritePString(result, out);
return 0;
}
#pragma mark - Trap Manager
uint16_t GetToolTrapAddress(uint16_t trap)
{
/*
* on entry:
* D0 trap number
*
* on exit:
* A0 Address of patch
*
*/
uint16_t trapNumber = cpuGetDReg(0);
Log("%04x GetToolTrapAddress($%04x)\n", trap, trapNumber);
cpuSetAReg(0, 0);
return MacOS::dsCoreErr;
}
uint16_t SetToolTrapAddress(uint16_t trap)
{
//pascal void SetToolTrapAddress(long trapAddr, short trapNum);
/*
* on entry:
* A0 Address of patch
* D0 trap number
*
* on exit:
*
*/
// this is used by the far model stub, presumably
// to replace LoadSeg.
uint16_t trapNumber = cpuGetDReg(0);
uint32_t trapAddress = cpuGetAReg(0);
Log("%04x SetToolTrapAddress($%08x, $%04x)\n",
trap, trapAddress, trapNumber);
return MacOS::dsCoreErr;
}
uint16_t GetOSTrapAddress(uint16_t trap)
{
/*
* on entry:
* D0 trap number
*
* on exit:
* A0 Address of patch
*
*/
uint16_t trapNumber = cpuGetDReg(0);
Log("%04x GetOSTrapAddress($%04x)\n", trap, trapNumber);
cpuSetAReg(0, 0);
return MacOS::dsCoreErr;
}
#pragma mark XP - RAM
// these are not particularly documented.
uint16_t ReadXPRam(uint16_t trap)
{
// a0 = address?
// d0 = count? item?
Log("%04x ReadXPRam()\n", trap);
return MacOS::prWrErr;
}
uint16_t WriteXPRam(uint16_t trap)
{
Log("%04x WriteXPRam()\n", trap);
return MacOS::prWrErr;
}
#pragma mark - Timer
struct TimerEntry {
uint32_t tmTaskPtr = 0; // address of the queue. passed back in A1.
uint32_t tmAddr = 0;
bool extended = false;
bool active = false;
std::chrono::time_point<std::chrono::steady_clock> when;
TimerEntry(uint32_t a, uint32_t b) : tmTaskPtr(a), tmAddr(b)
{}
};
// heap sorted by next task to run?
static std::deque<TimerEntry> TimerQueue;
namespace TMTask {
enum {
_qLink = 0,
_qType = 4,
_tmAddr = 6,
_tmCount = 10,
_tmWakeUp = 14,
_tmReserved = 18
};
}
uint16_t InsTime(uint16_t trap)
{
// PROCEDURE InsTime (tmTaskPtr: QElemPtr);
// this adds an entry to the queue but does not schedule it.
/*
* on entry
* A0 Address of the task record
*
* on exit
* D0 Result code
*/
using namespace TMTask;
uint32_t tmTaskPtr = cpuGetAReg(0);
Log("%04x InsTime(%08x)\n", trap, tmTaskPtr);
if (tmTaskPtr)
{
memoryWriteLong(0, tmTaskPtr + _qLink);
memoryWriteWord(0, tmTaskPtr + _qType);
memoryWriteLong(0, tmTaskPtr + _tmCount);
memoryWriteLong(0, tmTaskPtr + _tmWakeUp);
memoryWriteLong(0, tmTaskPtr + _tmReserved);
TimerQueue.emplace_back(tmTaskPtr, memoryReadLong(tmTaskPtr + _tmAddr));
}
return MacOS::noErr;
}
uint16_t PrimeTime(uint16_t trap)
{
// PROCEDURE PrimeTime (tmTaskPtr: QElemPtr; count: LongInt);
// this activates an entry.
/*
* on entry
* A0 Address of the task record
* D0 Specified delay time (long)
*
* on exit
* D0 Result code
*/
using namespace TMTask;
uint32_t tmTaskPtr = cpuGetAReg(0);
uint32_t count = cpuGetDReg(0);
Log("%04x PrimeTime(%08x, %08x)\n", trap, tmTaskPtr, count);
if (tmTaskPtr)
{
auto iter = std::find_if(TimerQueue.begin(), TimerQueue.end(), [tmTaskPtr](const TimerEntry &e){
return e.tmTaskPtr == tmTaskPtr;
});
if (iter != TimerQueue.end() && !iter->active)
{
auto now = std::chrono::steady_clock::now();
iter->active = true;
if (count == 0) {
// retain the original time or set it to now.
iter->when = std::max(now, iter->when);
}
else
{
int64_t micro;
if (count < 0x80000000)
micro = count * 1000;
else
micro = -(int32_t)count;
iter->when = now + std::chrono::microseconds(micro);
}
memoryWriteWord(tmTaskPtr + _qType, 0x8000);
}
}
return MacOS::noErr;
}
uint16_t RmvTime(uint16_t trap)
{
// PROCEDURE RmvTime (tmTaskPtr: QElemPtr);
// unschedule (but not actually remove)
/*
* on entry
* A0 Address of the task record
*
* on exit
* D0 Result code
*/
using namespace TMTask;
uint32_t tmTaskPtr = cpuGetAReg(0);
Log("%04x RmvTime(%08x)\n", trap, tmTaskPtr);
if (tmTaskPtr)
{
auto iter = std::find_if(TimerQueue.begin(), TimerQueue.end(), [tmTaskPtr](const TimerEntry &e){
return e.tmTaskPtr == tmTaskPtr;
});
if (iter != TimerQueue.end())
{
uint32_t count = 0;
if (iter->active)
{
iter->active = false;
// update tmCount to the amount of time remaining.
// uses negative microseconds
// or positive milliseconds.
auto now = std::chrono::steady_clock::now();
int64_t micro = std::chrono::duration_cast< std::chrono::microseconds >(iter->when - now).count();
if (micro < 0)
count = 0;
else if (micro < 0x80000000)
count = -micro;
else
count = micro / 10000;
}
memoryWriteWord(tmTaskPtr + _qType, 0);
memoryWriteLong(tmTaskPtr + _tmCount, count);
}
}
return MacOS::noErr;
}
}
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