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 int datastore_new(int unitsize, struct datastore **ds)
34 return SIGROK_ERR; /* TODO: Different error? */
36 if (!(*ds = g_malloc(sizeof(struct datastore))))
37 return SIGROK_ERR_MALLOC;
39 (*ds)->ds_unitsize = unitsize;
41 (*ds)->chunklist = NULL;
46 int datastore_destroy(struct datastore *ds)
53 for (chunk = ds->chunklist; chunk; chunk = chunk->next)
55 g_slist_free(ds->chunklist);
61 void datastore_put(struct datastore *ds, void *data, unsigned int length,
62 int in_unitsize, int *probelist)
65 int capacity, size, num_chunks, chunk_bytes_free, chunk_offset;
68 /* Avoid compiler warnings. */
69 in_unitsize = in_unitsize;
70 probelist = probelist;
72 if (ds->chunklist == NULL)
73 chunk = new_chunk(&ds);
75 chunk = g_slist_last(ds->chunklist)->data;
77 num_chunks = g_slist_length(ds->chunklist);
78 capacity = (num_chunks * DATASTORE_CHUNKSIZE);
79 chunk_bytes_free = capacity - (ds->ds_unitsize * ds->num_units);
80 chunk_offset = capacity - (DATASTORE_CHUNKSIZE * (num_chunks - 1))
83 while (stored < length) {
84 if (chunk_bytes_free == 0) {
85 chunk = new_chunk(&ds);
86 chunk_bytes_free = DATASTORE_CHUNKSIZE;
90 if (length - stored > (unsigned int)chunk_bytes_free)
91 size = chunk_bytes_free;
93 /* Last part, won't fill up this chunk. */
94 size = length - stored;
96 memcpy(chunk + chunk_offset, data + stored, size);
97 chunk_bytes_free -= size;
100 ds->num_units += stored / ds->ds_unitsize;
103 static gpointer new_chunk(struct datastore **ds)
107 if (!(chunk = malloc(DATASTORE_CHUNKSIZE * (*ds)->ds_unitsize)))
110 (*ds)->chunklist = g_slist_append((*ds)->chunklist, chunk);