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/>.
25 #include <sigrok-internal.h>
27 static gpointer new_chunk(struct sr_datastore **ds);
29 int sr_datastore_new(int unitsize, struct sr_datastore **ds)
35 return SR_ERR; /* TODO: Different error? */
37 if (!(*ds = g_malloc(sizeof(struct sr_datastore))))
40 (*ds)->ds_unitsize = unitsize;
42 (*ds)->chunklist = NULL;
47 int sr_datastore_destroy(struct sr_datastore *ds)
54 for (chunk = ds->chunklist; chunk; chunk = chunk->next)
56 g_slist_free(ds->chunklist);
62 void sr_datastore_put(struct sr_datastore *ds, void *data, unsigned int length,
63 int in_unitsize, int *probelist)
66 int capacity, size, num_chunks, chunk_bytes_free, chunk_offset;
69 /* Avoid compiler warnings. */
70 in_unitsize = in_unitsize;
71 probelist = probelist;
73 if (ds->chunklist == NULL)
74 chunk = new_chunk(&ds);
76 chunk = g_slist_last(ds->chunklist)->data;
78 num_chunks = g_slist_length(ds->chunklist);
79 capacity = (num_chunks * DATASTORE_CHUNKSIZE);
80 chunk_bytes_free = capacity - (ds->ds_unitsize * ds->num_units);
81 chunk_offset = capacity - (DATASTORE_CHUNKSIZE * (num_chunks - 1))
84 while (stored < length) {
85 if (chunk_bytes_free == 0) {
86 chunk = new_chunk(&ds);
87 chunk_bytes_free = DATASTORE_CHUNKSIZE;
91 if (length - stored > (unsigned int)chunk_bytes_free)
92 size = chunk_bytes_free;
94 /* Last part, won't fill up this chunk. */
95 size = length - stored;
97 memcpy(chunk + chunk_offset, data + stored, size);
98 chunk_bytes_free -= size;
101 ds->num_units += stored / ds->ds_unitsize;
104 static gpointer new_chunk(struct sr_datastore **ds)
108 if (!(chunk = malloc(DATASTORE_CHUNKSIZE * (*ds)->ds_unitsize)))
111 (*ds)->chunklist = g_slist_append((*ds)->chunklist, chunk);