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lseek

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This commit is contained in:
Kelvin Sherlock 2013-02-15 23:47:15 -05:00
parent 475cbc47eb
commit 989b91a465
1 changed files with 62 additions and 5 deletions
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67
mpw/mpw.cpp
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@ -121,8 +121,10 @@ namespace {
if (f.flags & kO_RSRC)
sname.append(_PATH_RSRCFORKSPEC);
if (f.flags & kO_CREAT) fd = ::open(sname.c_str(), nativeFlags, 0666);
else fd = ::open(sname.c_str(), nativeFlags);
if (f.flags & kO_CREAT)
fd = ::open(sname.c_str(), nativeFlags, 0666);
else
fd = ::open(sname.c_str(), nativeFlags);
if (fd < 0)
{
@ -450,6 +452,63 @@ namespace {
return kEINVAL;
}
uint32_t ftrap_lseek(uint32_t parm, uint32_t arg)
{
MPWFile f;
uint32_t d0;
uint32_t whence = memoryReadLong(arg);
int32_t offset =memoryReadLong(arg + 4);
int nativeWhence = 0;
f.flags = memoryReadWord(parm);
f.error = memoryReadWord(parm + 2);
f.device = memoryReadLong(parm + 4);
f.cookie = memoryReadLong(parm + 8);
f.count = memoryReadLong(parm + 12);
f.buffer = memoryReadLong(parm + 16);
int fd = f.cookie;
// TODO - MacOS returns eofERR and sets mark to eof
// if seeking past the eof.
// TODO - MacOS treats offset as a signed value, unix is unsigned [?]
switch (whence)
{
case kSEEK_CUR:
nativeWhence = SEEK_CUR;
break;
case kSEEK_END:
nativeWhence = SEEK_END;
break;
case kSEEK_SET:
nativeWhence = SEEK_SET;
break;
default:
memoryWriteWord(0, parm + 2);
return kEINVAL;
}
fprintf(stderr, " seek(%02x, %08x, %02x)\n", fd, offset, nativeWhence);
if (::lseek(fd, offset, nativeWhence) < 0)
{
d0 = errno_to_errno(errno);
f.error = 0;
}
else
{
d0 = 0;
f.error = 0;
}
memoryWriteWord(f.error, parm + 2);
return d0;
}
void ftrap_ioctl(uint16_t trap)
{
@ -467,11 +526,10 @@ namespace {
switch (cmd)
{
/*
case kFIOLSEEK:
d0 = ftrap_lseek(fd, arg);
break;
*/
case kFIODUPFD:
d0 = ftrap_dup(fd, arg);
break;
@ -488,7 +546,6 @@ namespace {
d0 = ftrap_iofname(fd, arg);
break;
case kFIOLSEEK:
case kFIOREFNUM:
case kFIOSETEOF:
fprintf(stderr, "ioctl - unsupported op %04x\n", cmd);