libsigrok/session_file.c

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/*
* This file is part of the sigrok project.
*
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* Copyright (C) 2010-2012 Bert Vermeulen <bert@biot.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <zip.h>
#include <glib.h>
#include <glib/gstdio.h>
#include "config.h"
#include "sigrok.h"
#include "sigrok-internal.h"
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extern struct sr_session *session;
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extern SR_PRIV struct sr_dev_driver session_driver;
/**
* Load the session from the specified filename.
*
* @param filename The name of the session file to load. Must not be NULL.
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments,
* SR_ERR_MALLOC upon memory allocation errors, or SR_ERR upon
* other errors.
*/
SR_API int sr_session_load(const char *filename)
{
GKeyFile *kf;
GPtrArray *capturefiles;
struct zip *archive;
struct zip_file *zf;
struct zip_stat zs;
struct sr_dev *dev;
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struct sr_probe *probe;
int ret, probenum, devcnt, i, j;
uint64_t tmp_u64, total_probes, enabled_probes, p;
char **sections, **keys, *metafile, *val, c;
char probename[SR_MAX_PROBENAME_LEN + 1];
if (!filename) {
sr_err("session file: %s: filename was NULL", __func__);
return SR_ERR_ARG;
}
if (!(archive = zip_open(filename, 0, &ret))) {
sr_dbg("session file: Failed to open session file: zip "
"error %d", ret);
return SR_ERR;
}
/* check "version" */
if (!(zf = zip_fopen(archive, "version", 0))) {
sr_dbg("session file: Not a sigrok session file.");
return SR_ERR;
}
ret = zip_fread(zf, &c, 1);
if (ret != 1 || c != '1') {
sr_dbg("session file: Not a valid sigrok session file.");
return SR_ERR;
}
zip_fclose(zf);
/* read "metadata" */
if (zip_stat(archive, "metadata", 0, &zs) == -1) {
sr_dbg("session file: Not a valid sigrok session file.");
return SR_ERR;
}
if (!(metafile = g_try_malloc(zs.size))) {
sr_err("session file: %s: metafile malloc failed", __func__);
return SR_ERR_MALLOC;
}
zf = zip_fopen_index(archive, zs.index, 0);
zip_fread(zf, metafile, zs.size);
zip_fclose(zf);
kf = g_key_file_new();
if (!g_key_file_load_from_data(kf, metafile, zs.size, 0, NULL)) {
sr_dbg("session file: Failed to parse metadata.");
return SR_ERR;
}
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sr_session_new();
devcnt = 0;
capturefiles = g_ptr_array_new_with_free_func(g_free);
sections = g_key_file_get_groups(kf, NULL);
for (i = 0; sections[i]; i++) {
if (!strcmp(sections[i], "global"))
/* nothing really interesting in here yet */
continue;
if (!strncmp(sections[i], "device ", 7)) {
/* device section */
dev = NULL;
enabled_probes = 0;
keys = g_key_file_get_keys(kf, sections[i], NULL, NULL);
for (j = 0; keys[j]; j++) {
val = g_key_file_get_string(kf, sections[i], keys[j], NULL);
if (!strcmp(keys[j], "capturefile")) {
dev = sr_dev_new(&session_driver, devcnt);
if (devcnt == 0)
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/* first device, init the driver */
dev->driver->init((char *)filename);
sr_session_dev_add(dev);
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dev->driver->dev_config_set(devcnt, SR_HWCAP_CAPTUREFILE, val);
g_ptr_array_add(capturefiles, val);
} else if (!strcmp(keys[j], "samplerate")) {
sr_parse_sizestring(val, &tmp_u64);
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dev->driver->dev_config_set(devcnt, SR_HWCAP_SAMPLERATE, &tmp_u64);
} else if (!strcmp(keys[j], "unitsize")) {
tmp_u64 = strtoull(val, NULL, 10);
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dev->driver->dev_config_set(devcnt, SR_HWCAP_CAPTURE_UNITSIZE, &tmp_u64);
} else if (!strcmp(keys[j], "total probes")) {
total_probes = strtoull(val, NULL, 10);
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dev->driver->dev_config_set(devcnt, SR_HWCAP_CAPTURE_NUM_PROBES, &total_probes);
for (p = 0; p < total_probes; p++) {
snprintf(probename, SR_MAX_PROBENAME_LEN, "%" PRIu64, p);
sr_dev_probe_add(dev, probename);
}
} else if (!strncmp(keys[j], "probe", 5)) {
if (!dev)
continue;
enabled_probes++;
tmp_u64 = strtoul(keys[j]+5, NULL, 10);
sr_dev_probe_name_set(dev, tmp_u64, val);
} else if (!strncmp(keys[j], "trigger", 7)) {
probenum = strtoul(keys[j]+7, NULL, 10);
sr_dev_trigger_set(dev, probenum, val);
}
}
g_strfreev(keys);
for (p = enabled_probes; p < total_probes; p++) {
probe = g_slist_nth_data(dev->probes, p);
probe->enabled = FALSE;
}
}
}
g_strfreev(sections);
g_key_file_free(kf);
return SR_OK;
}
/**
* Save the current session to the specified file.
*
* @param filename The name of the file where to save the current session.
* Must not be NULL.
*
* @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
* upon other errors.
*/
int sr_session_save(const char *filename)
{
GSList *l, *p, *d;
FILE *meta;
struct sr_dev *dev;
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struct sr_probe *probe;
struct sr_datastore *ds;
struct zip *zipfile;
struct zip_source *versrc, *metasrc, *logicsrc;
int bufcnt, devcnt, tmpfile, ret, probecnt;
uint64_t samplerate;
char version[1], rawname[16], metafile[32], *buf, *s;
if (!filename) {
sr_err("session file: %s: filename was NULL", __func__);
return SR_ERR_ARG;
}
/* Quietly delete it first, libzip wants replace ops otherwise. */
unlink(filename);
if (!(zipfile = zip_open(filename, ZIP_CREATE, &ret)))
return SR_ERR;
/* "version" */
version[0] = '1';
if (!(versrc = zip_source_buffer(zipfile, version, 1, 0)))
return SR_ERR;
if (zip_add(zipfile, "version", versrc) == -1) {
sr_info("session file: error saving version into zipfile: %s",
zip_strerror(zipfile));
return SR_ERR;
}
/* init "metadata" */
strcpy(metafile, "sigrok-meta-XXXXXX");
if ((tmpfile = g_mkstemp(metafile)) == -1)
return SR_ERR;
close(tmpfile);
meta = g_fopen(metafile, "wb");
fprintf(meta, "[global]\n");
fprintf(meta, "sigrok version = %s\n", PACKAGE_VERSION);
/* TODO: save protocol decoders used */
/* all datastores in all devices */
devcnt = 1;
for (l = session->devs; l; l = l->next) {
dev = l->data;
/* metadata */
fprintf(meta, "[device %d]\n", devcnt);
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if (dev->driver)
fprintf(meta, "driver = %s\n", dev->driver->name);
ds = dev->datastore;
if (ds) {
/* metadata */
fprintf(meta, "capturefile = logic-%d\n", devcnt);
fprintf(meta, "unitsize = %d\n", ds->ds_unitsize);
fprintf(meta, "total probes = %d\n", g_slist_length(dev->probes));
if (sr_dev_has_hwcap(dev, SR_HWCAP_SAMPLERATE)) {
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samplerate = *((uint64_t *) dev->driver->dev_info_get(
dev->driver_index, SR_DI_CUR_SAMPLERATE));
s = sr_samplerate_string(samplerate);
fprintf(meta, "samplerate = %s\n", s);
g_free(s);
}
probecnt = 1;
for (p = dev->probes; p; p = p->next) {
probe = p->data;
if (probe->enabled) {
if (probe->name)
fprintf(meta, "probe%d = %s\n", probecnt, probe->name);
if (probe->trigger)
fprintf(meta, " trigger%d = %s\n", probecnt, probe->trigger);
probecnt++;
}
}
/* dump datastore into logic-n */
buf = g_try_malloc(ds->num_units * ds->ds_unitsize +
DATASTORE_CHUNKSIZE);
if (!buf) {
sr_err("session file: %s: buf malloc failed",
__func__);
return SR_ERR_MALLOC;
}
bufcnt = 0;
for (d = ds->chunklist; d; d = d->next) {
memcpy(buf + bufcnt, d->data,
DATASTORE_CHUNKSIZE);
bufcnt += DATASTORE_CHUNKSIZE;
}
if (!(logicsrc = zip_source_buffer(zipfile, buf,
ds->num_units * ds->ds_unitsize, TRUE)))
return SR_ERR;
snprintf(rawname, 15, "logic-%d", devcnt);
if (zip_add(zipfile, rawname, logicsrc) == -1)
return SR_ERR;
}
devcnt++;
}
fclose(meta);
if (!(metasrc = zip_source_file(zipfile, metafile, 0, -1)))
return SR_ERR;
if (zip_add(zipfile, "metadata", metasrc) == -1)
return SR_ERR;
if ((ret = zip_close(zipfile)) == -1) {
sr_info("session file: error saving zipfile: %s",
zip_strerror(zipfile));
return SR_ERR;
}
unlink(metafile);
return SR_OK;
}