2 * This file is part of the sigrok project.
4 * Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
6 * This program is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
26 static gpointer new_chunk(struct datastore **ds);
28 struct datastore *datastore_new(int unitsize)
32 ds = g_malloc(sizeof(struct datastore));
33 ds->ds_unitsize = unitsize;
40 void datastore_destroy(struct datastore *ds)
44 for (chunk = ds->chunklist; chunk; chunk = chunk->next)
46 g_slist_free(ds->chunklist);
50 void datastore_put(struct datastore *ds, void *data, unsigned int length,
51 int in_unitsize, int *probelist)
54 int capacity, size, num_chunks, chunk_bytes_free, chunk_offset;
58 in_unitsize = in_unitsize;
59 probelist = probelist;
61 if (ds->chunklist == NULL)
62 chunk = new_chunk(&ds);
64 chunk = g_slist_last(ds->chunklist)->data;
66 num_chunks = g_slist_length(ds->chunklist);
67 capacity = (num_chunks * DATASTORE_CHUNKSIZE);
68 chunk_bytes_free = capacity - (ds->ds_unitsize * ds->num_units);
69 chunk_offset = capacity - (DATASTORE_CHUNKSIZE * (num_chunks - 1))
72 while (stored < length) {
73 if (chunk_bytes_free == 0) {
74 chunk = new_chunk(&ds);
75 chunk_bytes_free = DATASTORE_CHUNKSIZE;
79 if (length - stored > (unsigned int)chunk_bytes_free)
80 size = chunk_bytes_free;
82 /* Last part, won't fill up this chunk. */
83 size = length - stored;
85 memcpy(chunk + chunk_offset, data + stored, size);
86 chunk_bytes_free -= size;
89 ds->num_units += stored / ds->ds_unitsize;
92 static gpointer new_chunk(struct datastore **ds)
96 chunk = g_malloc(DATASTORE_CHUNKSIZE * (*ds)->ds_unitsize);
97 (*ds)->chunklist = g_slist_append((*ds)->chunklist, chunk);