ham_status_t
os_pwrite(ham_fd_t fd, ham_offset_t addr, const void *buffer,
ham_offset_t bufferlen)
{
ham_status_t st;
st=os_seek(fd, addr, HAM_OS_SEEK_SET);
if (st)
return (st);
return (os_write(fd, buffer, bufferlen));
}
/* Fill a given buffer with the given block in volume.
*/
int
volume_readinbuf(volume * vol,void* buf, long block)
{
UInt16 blksize_bits;
ASSERT( block < vol->maxblocks);
blksize_bits = vol->blksize_bits;
block += vol->startblock;
if( os_seek(vol->os_fd, block, blksize_bits) == block)
if( 1 == os_read(vol->os_fd, buf, 1, blksize_bits))
return 0;
return -1;
}
ham_status_t
os_truncate(ham_fd_t fd, ham_offset_t newsize)
{
ham_status_t st;
st=os_seek(fd, newsize, HAM_OS_SEEK_SET);
if (st)
return (st);
if (!SetEndOfFile((HANDLE)fd)) {
char buf[256];
st=(ham_status_t)GetLastError();
ham_log(("SetEndOfFile failed with OS status %u (%s)", st, DisplayError(buf, sizeof(buf), st)));
return (HAM_IO_ERROR);
}
return (HAM_SUCCESS);
}
void cw_close(CompoundWriter *cw)
{
OutStream *os = NULL;
int i;
if (cw->ids->size <= 0) {
RAISE(STATE_ERROR, "Tried to merge compound file with no entries");
}
os = cw->store->new_output(cw->store, cw->name);
os_write_vint(os, ary_size(cw->file_entries));
/* Write the directory with all offsets at 0.
* Remember the positions of directory entries so that we can adjust the
* offsets later */
for (i = 0; i < ary_size(cw->file_entries); i++) {
cw->file_entries[i].dir_offset = os_pos(os);
os_write_u64(os, 0); /* for now */
os_write_string(os, cw->file_entries[i].name);
}
/* Open the files and copy their data into the stream. Remember the
* locations of each file's data section. */
for (i = 0; i < ary_size(cw->file_entries); i++) {
cw->file_entries[i].data_offset = os_pos(os);
cw_copy_file(cw, &cw->file_entries[i], os);
}
/* Write the data offsets into the directory of the compound stream */
for (i = 0; i < ary_size(cw->file_entries); i++) {
os_seek(os, cw->file_entries[i].dir_offset);
os_write_u64(os, cw->file_entries[i].data_offset);
}
if (os) {
os_close(os);
}
hs_destroy(cw->ids);
ary_free(cw->file_entries);
free(cw);
}
ham_status_t
os_pread(ham_fd_t fd, ham_offset_t addr, void *buffer,
ham_offset_t bufferlen)
{
ham_status_t st;
DWORD read=0;
st=os_seek(fd, addr, HAM_OS_SEEK_SET);
if (st)
return (st);
if (!ReadFile((HANDLE)fd, buffer, (DWORD)bufferlen, &read, 0)) {
char buf[256];
st=(ham_status_t)GetLastError();
ham_log(("ReadFile failed with OS status %u (%s)", st, DisplayError(buf, sizeof(buf), st)));
return (HAM_IO_ERROR);
}
return (read==bufferlen ? 0 : HAM_IO_ERROR);
}
s32 FFS_Seek(s32 fd, s32 offset, s32 mode)
{
return os_seek(fd, offset, mode);
}
void ramo_reset(OutStream *os)
{
os_seek(os, 0);
os->file.rf->len = 0;
}
