/*
* Re-open a suspended file for reading. This allocates all the necessary
* buffers and data structures to restart reading from the file
*/
void
ExecWorkFile_Restart(ExecWorkFile *workfile)
{
Assert(workfile != NULL);
Assert((workfile->flags & EXEC_WORKFILE_SUSPENDABLE) != 0);
switch(workfile->fileType)
{
case BFZ:
bfz_scan_begin((bfz_t *) workfile->file);
break;
default:
insist_log(false, "invalid work file type: %d", workfile->fileType);
}
}
/*
* Tests that bfz->freeable_stuff->tot_bytes is initialized to 0
* in bfz_scan_begin
*/
void
test__bfz_scan_begin_initbytes(void **state)
{
bfz_t *bfz = palloc0(sizeof(bfz_t));
bfz->compression_index = 0; /* compress_nothing */
bfz->mode = BFZ_MODE_FREED;
bfz->fd = 1;
bfz_scan_begin(bfz);
assert_true(bfz->mode == BFZ_MODE_SCAN);
struct bfz_freeable_stuff *fs = bfz->freeable_stuff;
assert_true(fs->buffer_pointer == fs->buffer_end);
assert_true((void *) fs->buffer_end == (void *) fs->buffer);
assert_true(fs->tot_bytes == 0L);
}
/*
* ExecWorkFile_Rewind
* rewind the pointer position to the beginning of the file.
*
* This function returns true if this succeeds. Otherwise, return false.
*/
bool
ExecWorkFile_Rewind(ExecWorkFile *workfile)
{
Assert(workfile != NULL);
long ret = 0;
int64 file_size = 0;
switch(workfile->fileType)
{
case BUFFILE:
ret = BufFileSeek((BufFile *)workfile->file, 0L /* offset */, SEEK_SET);
/* BufFileSeek returns 0 if everything went OK */
return (0 == ret);
case BFZ:
file_size = bfz_append_end((bfz_t *)workfile->file);
ExecWorkFile_AdjustBFZSize(workfile, file_size);
bfz_scan_begin((bfz_t *)workfile->file);
break;
default:
insist_log(false, "invalid work file type: %d", workfile->fileType);
}
return true;
}
