adding a merge map function #6
1 changed files with 25 additions and 32 deletions
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@ -1262,40 +1262,31 @@ sparsemap_merge(sparsemap_t *map, sparsemap_t *other)
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{
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uint8_t *src, *dst, *dst_tail;
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size_t src_count = __sm_get_chunk_map_count(other),
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dst_count = __sm_get_chunk_map_count(map);
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dst_count = __sm_get_chunk_map_count(map),
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max_chunk_count = src_count + dst_count;
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dst = __sm_get_chunk_map_data(map, 0);
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src = __sm_get_chunk_map_data(other, 0);
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/* Foreach destination chunk, is there a source chunk with the same starting
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offset? If so, if so let's merge them. */
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for (size_t i = 0; i < dst_count + src_count; i++) {
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next_iteration:;
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for (size_t i = 0; i < max_chunk_count && src_count; i++) {
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__sm_chunk_t dst_chunk;
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sm_idx_t dst_start = *(sm_idx_t *)dst;
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__sm_chunk_map_init(&dst_chunk, dst + sizeof(sm_idx_t));
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if (i < dst_count) {
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size_t j = 0;
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while (j < src_count) {
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__sm_chunk_t src_chunk;
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sm_idx_t src_start = *(sm_idx_t *)src;
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__sm_chunk_map_init(&src_chunk, src + sizeof(sm_idx_t));
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if (src_start == dst_start) {
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if (dst_count > 0 && src_start == dst_start) {
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/* Chunks overlap, merge them. */
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__sm_chunk_map_merge(map, src_start, src_chunk);
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src = SM_NEXT_CHUNK_ADDR(src);
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dst = SM_NEXT_CHUNK_ADDR(dst);
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i++;
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goto next_iteration;
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}
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src = __sm_get_chunk_map_data(other, 0);
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j++;
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}
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}
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__sm_chunk_t src_chunk;
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sm_idx_t src_start = *(sm_idx_t *)src;
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__sm_chunk_map_init(&src_chunk, src + sizeof(sm_idx_t));
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/* Copy the chunk data to the buffer. */
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dst_count--;
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src_count--;
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continue;
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} else {
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/* Copy the chunk data directly into the buffer. */
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// TODO capacity check? ENOMEM
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dst_tail = __sm_get_chunk_map_end(map);
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*(sm_idx_t *)dst_tail = src_start;
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size_t size = __sm_chunk_map_get_size(&src_chunk);
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@ -1305,6 +1296,8 @@ sparsemap_merge(sparsemap_t *map, sparsemap_t *other)
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map->m_data_used = 0;
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__sm_set_chunk_map_count(map, __sm_get_chunk_map_count(map) + 1);
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src = SM_NEXT_CHUNK_ADDR(src);
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src_count--;
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}
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}
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}
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