diff options
Diffstat (limited to 'core/structured_list.h')
| -rw-r--r-- | core/structured_list.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/core/structured_list.h b/core/structured_list.h new file mode 100644 index 000000000..232e4ee34 --- /dev/null +++ b/core/structured_list.h @@ -0,0 +1,30 @@ +// SPDX-License-Identifier: GPL-2.0 +#ifndef STRUCTURED_LIST_H +#define STRUCTURED_LIST_H + +/* Clear everything but the first element; + * this works for taglist, picturelist, even dive computers */ +#define STRUCTURED_LIST_FREE(_type, _start, _free) \ + { \ + _type *_ptr = _start; \ + while (_ptr) { \ + _type *_next = _ptr->next; \ + _free(_ptr); \ + _ptr = _next; \ + } \ + } + +#define STRUCTURED_LIST_COPY(_type, _first, _dest, _cpy) \ + { \ + _type *_sptr = _first; \ + _type **_dptr = &_dest; \ + while (_sptr) { \ + *_dptr = malloc(sizeof(_type)); \ + _cpy(_sptr, *_dptr); \ + _sptr = _sptr->next; \ + _dptr = &(*_dptr)->next; \ + } \ + *_dptr = 0; \ + } + +#endif |