101 lines
2.5 KiB
C
101 lines
2.5 KiB
C
/*
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* This file is part of the sigrok project.
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*
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* Copyright (C) 2010 Bert Vermeulen <bert@biot.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <glib.h>
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#include "sigrok.h"
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static gpointer new_chunk(struct datastore **ds);
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struct datastore *datastore_new(int unitsize)
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{
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struct datastore *ds;
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ds = g_malloc(sizeof(struct datastore));
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ds->ds_unitsize = unitsize;
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ds->num_units = 0;
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ds->chunklist = NULL;
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return ds;
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}
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void datastore_destroy(struct datastore *ds)
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{
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GSList *chunk;
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for(chunk = ds->chunklist; chunk; chunk = chunk->next)
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g_free(chunk->data);
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g_slist_free(ds->chunklist);
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g_free(ds);
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}
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void datastore_put(struct datastore *ds, void *data, unsigned int length, int in_unitsize, int *probelist)
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{
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int capacity, stored, size, num_chunks, chunk_bytes_free, chunk_offset;
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gpointer chunk;
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if(ds->chunklist == NULL)
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chunk = new_chunk(&ds);
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else
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chunk = g_slist_last(ds->chunklist)->data;
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num_chunks = g_slist_length(ds->chunklist);
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capacity = (num_chunks * DATASTORE_CHUNKSIZE);
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chunk_bytes_free = capacity - (ds->ds_unitsize * ds->num_units);
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chunk_offset = capacity - (DATASTORE_CHUNKSIZE * (num_chunks - 1)) - chunk_bytes_free;
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stored = 0;
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while(stored < length) {
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if(chunk_bytes_free == 0) {
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chunk = new_chunk(&ds);
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chunk_bytes_free = DATASTORE_CHUNKSIZE;
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chunk_offset = 0;
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}
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if(length - stored > chunk_bytes_free)
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size = chunk_bytes_free;
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else
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/* last part, won't fill up this chunk */
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size = length - stored;
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memcpy(chunk + chunk_offset, data + stored, size);
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chunk_bytes_free -= size;
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stored += size;
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}
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ds->num_units += stored / ds->ds_unitsize;
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}
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static gpointer new_chunk(struct datastore **ds)
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{
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gpointer chunk;
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chunk = g_malloc(DATASTORE_CHUNKSIZE * (*ds)->ds_unitsize);
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(*ds)->chunklist = g_slist_append((*ds)->chunklist, chunk);
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return chunk;
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}
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