SIZE_OR_ERROR FS_read(const char *path, char *buf, const size_t size, const off_t offset)
{
SIZE_OR_ERROR read_or_error;
OWQ_allocate_struct_and_pointer(owq);
LEVEL_CALL("path=%s size=%d offset=%d", SAFESTRING(path), (int) size, (int) offset);
// Parseable path?
if ( BAD( OWQ_create(path, owq) ) ) { // for read
return -ENOENT;
}
OWQ_assign_read_buffer( buf, size, offset, owq) ;
read_or_error = FS_read_postparse(owq);
OWQ_destroy(owq);
return read_or_error;
}
/* called when pn->extension==EXTENSION_ALL and pn->selected_filetype->ag->combined==ag_separate */
static ZERO_OR_ERROR FS_read_tester_array(struct one_wire_query *owq)
{
size_t elements = OWQ_pn(owq).selected_filetype->ag->elements;
size_t extension;
size_t entry_length = FileLength(PN(owq));
for (extension = 0; extension < elements; ++extension) {
struct one_wire_query * owq_single = OWQ_create_separate( extension, owq ) ;
if ( owq_single == NO_ONE_WIRE_QUERY ) {
return -ENOMEM ;
}
switch (OWQ_pn(owq).selected_filetype->format) {
case ft_integer:
case ft_yesno:
case ft_bitfield:
case ft_unsigned:
case ft_pressure:
case ft_temperature:
case ft_tempgap:
case ft_float:
case ft_date:
break;
case ft_vascii:
case ft_alias:
case ft_ascii:
case ft_binary:
OWQ_assign_read_buffer(&OWQ_buffer(owq)[extension * entry_length],entry_length,0,owq_single) ;
break;
case ft_directory:
case ft_subdir:
case ft_unknown:
OWQ_destroy(owq_single) ;
return -ENOENT;
}
if (FS_read_tester_single(owq_single)) {
OWQ_destroy(owq_single) ;
return -EINVAL;
}
memcpy(&OWQ_array(owq)[extension], &OWQ_val(owq_single), sizeof(union value_object));
OWQ_destroy(owq_single) ;
}
return 0;
}