static void getdir( struct charblob * cb, struct one_wire_query * owq )
{
if ( FS_dir( getdircallback, cb, PN(owq) ) != 0 ) {
CharblobClear( cb ) ;
} else if ( CharblobLength(cb) == 0 ) {
CharblobAddChar( '\0', cb) ;
}
}
static int getdir( struct charblob * cb, struct one_wire_query * owq )
{
int ret = 0;
if ( (ret = FS_dir( getdircallback, cb, PN(owq) )) != 0 ) {
CharblobClear( cb ) ;
} else if ( CharblobLength(cb) == 0 ) {
CharblobAddChar( '\0', cb) ;
}
return ret;
}
SIZE_OR_ERROR FS_get(const char *path, char **return_buffer, size_t * buffer_length)
{
SIZE_OR_ERROR size = 0 ; /* current buffer string length */
OWQ_allocate_struct_and_pointer( owq ) ;
/* Check the parameters */
if (return_buffer == NULL) {
// No buffer for read result.
return -EINVAL;
}
if (path == NULL) {
path = "/";
}
*return_buffer = NULL; // default return string on error
if ( BAD( OWQ_create(path, owq) ) ) { /* Can we parse the input string */
return -ENOENT;
}
if ( IsDir( PN(owq) ) ) { /* A directory of some kind */
struct charblob cb ;
CharblobInit(&cb) ;
getdir( &cb, owq ) ;
size = CharblobLength(&cb) ;
*return_buffer = copy_buffer( CharblobData(&cb), size ) ;
CharblobClear( &cb ) ;
} else { /* A regular file -- so read */
if ( GOOD(OWQ_allocate_read_buffer(owq)) ) { // make the space in the buffer
size = FS_read_postparse(owq) ;
*return_buffer = copy_buffer( OWQ_buffer(owq), size ) ;
}
}
// the buffer is allocated by getdir or getval
OWQ_destroy(owq);
/* Check the parameters */
if (*return_buffer == NULL) {
// no data.
return -EINVAL;
}
if ( buffer_length != NULL ) {
*buffer_length = size ;
}
return size ;
}
SIZE_OR_ERROR FS_get(const char *path, char **return_buffer, size_t * buffer_length)
{
SIZE_OR_ERROR size = 0 ; /* current buffer string length */
OWQ_allocate_struct_and_pointer( owq ) ;
/* Check the parameters */
if (return_buffer == NULL) {
// No buffer supplied for read result.
return -EINVAL;
}
if (path == NULL) {
path = "/";
}
*return_buffer = NULL; // default return string on error
if ( BAD( OWQ_create(path, owq) ) ) { /* Can we parse the input string */
return -ENOENT;
}
// Check for known type.
if ( (PN(owq)->selected_filetype) != NO_FILETYPE ) {
// local owlib knows the type.
if ( IsDir( PN(owq) ) ) { /* A directory of some kind */
struct charblob cb ;
CharblobInit(&cb) ;
getdir( &cb, owq ) ;
size = CharblobLength(&cb) ;
*return_buffer = copy_buffer( CharblobData(&cb), size ) ;
CharblobClear(&cb) ;
} else { /* A regular file -- so read */
if ( GOOD(OWQ_allocate_read_buffer(owq)) ) { // make the space in the buffer
size = FS_read_postparse(owq) ;
*return_buffer = copy_buffer( OWQ_buffer(owq), size ) ;
}
}
} else {
// local owlib doesn't know the type.
struct charblob cb ;
CharblobInit(&cb) ;
// Try directory first.
if (getdir( &cb, owq ) != -ENOTDIR) {
// Is a directory.
size = CharblobLength(&cb) ;
*return_buffer = copy_buffer( CharblobData(&cb), size ) ;
} else {
// Is not a directory. Try file.
if ( GOOD(OWQ_allocate_read_buffer(owq)) ) { // make the space in the buffer
size = FS_read_postparse(owq) ;
*return_buffer = copy_buffer( OWQ_buffer(owq), size ) ;
}
}
CharblobClear(&cb) ;
}
// the buffer is allocated by getdir or getval
OWQ_destroy(owq);
/* Check the parameters */
if (*return_buffer == NULL) {
// error
return -EINVAL;
}
if ( buffer_length != NULL ) {
// return buffer length as well
*buffer_length = size ;
}
return size ;
}
