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59e602447b
Introduce two DiveListNotifier signals which are sent by the undo commands if dives are added to / removed from the core. The signal has the dive site and the index in the global dive site table as payload. Thus, the model has only to remove the appropriate rows. Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>
94 lines
3.2 KiB
C
94 lines
3.2 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/* This header defines a number of macros that generate table-manipulation functions.
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* There is no design behind these macros - the functions were take as-is and transformed
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* into macros. Thus, this whole header could do with some redesign. */
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#ifndef CORE_TABLE_H
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#define CORE_TABLE_H
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#define MAKE_GROW_TABLE(table_type, item_type, array_name) \
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item_type *grow_##table_type(struct table_type *table) \
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{ \
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int nr = table->nr, allocated = table->allocated; \
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item_type *items = table->array_name; \
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\
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if (nr >= allocated) { \
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allocated = (nr + 32) * 3 / 2; \
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items = realloc(items, allocated * sizeof(item_type)); \
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if (!items) \
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exit(1); \
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table->array_name = items; \
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table->allocated = allocated; \
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} \
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return items; \
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}
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/* get the index where we want to insert an object so that everything stays
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* ordered according to a comparison function() */
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#define MAKE_GET_INSERTION_INDEX(table_type, item_type, array_name, fun) \
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int table_type##_get_insertion_index(struct table_type *table, item_type item) \
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{ \
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/* we might want to use binary search here */ \
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for (int i = 0; i < table->nr; i++) { \
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if (fun(item, table->array_name[i])) \
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return i; \
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} \
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return table->nr; \
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}
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/* add object at the given index to a table. */
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#define MAKE_ADD_TO(table_type, item_type, array_name) \
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void add_to_##table_type(struct table_type *table, int idx, item_type item) \
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{ \
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int i; \
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grow_##table_type(table); \
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table->nr++; \
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\
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for (i = idx; i < table->nr; i++) { \
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item_type tmp = table->array_name[i]; \
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table->array_name[i] = item; \
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item = tmp; \
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} \
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}
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#define MAKE_REMOVE_FROM(table_type, array_name) \
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void remove_from_##table_type(struct table_type *table, int idx) \
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{ \
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int i; \
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for (i = idx; i < table->nr - 1; i++) \
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table->array_name[i] = table->array_name[i + 1]; \
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table->array_name[--table->nr] = NULL; \
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}
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#define MAKE_GET_IDX(table_type, item_type, array_name) \
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int get_idx_in_##table_type(const struct table_type *table, const item_type item) \
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{ \
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for (int i = 0; i < table->nr; ++i) { \
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if (table->array_name[i] == item) \
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return i; \
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} \
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return -1; \
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}
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#define MAKE_SORT(table_type, item_type, array_name, fun) \
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static int sortfn_##table_type(const void *_a, const void *_b) \
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{ \
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const item_type a = (const item_type)*(const void **)_a; \
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const item_type b = (const item_type)*(const void **)_b; \
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return fun(a, b); \
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} \
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\
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void sort_##table_type(struct table_type *table) \
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{ \
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qsort(table->array_name, table->nr, sizeof(item_type), sortfn_##table_type); \
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}
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#define MAKE_REMOVE(table_type, item_type, item_name) \
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int remove_##item_name(const item_type item, struct table_type *table) \
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{ \
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int idx = get_idx_in_##table_type(table, item); \
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if (idx >= 0) \
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remove_from_##table_type(table, idx); \
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return idx; \
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}
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#endif
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