X-Git-Url: https://sigrok.org/gitweb/?a=blobdiff_plain;f=session_file.c;h=6cd9b72025ad54a3146d40c8d1e856963d4fa23e;hb=5724a20af7a6449204d79972c6804d6c9b34b3f8;hp=4838a6be00566b2f0fc7fb140697bc7f4b653b2c;hpb=29a27196a13de2ffd9b671185e4b464b9db9b549;p=libsigrok.git

diff --git a/session_file.c b/session_file.c
index 4838a6be..6cd9b720 100644
--- a/session_file.c
+++ b/session_file.c
@@ -51,54 +51,36 @@
 extern struct sr_session *session;
 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)
+/** @private */
+SR_PRIV int sr_sessionfile_check(const char *filename)
 {
-	GKeyFile *kf;
-	GPtrArray *capturefiles;
 	struct zip *archive;
 	struct zip_file *zf;
 	struct zip_stat zs;
-	struct sr_dev_inst *sdi;
-	struct sr_probe *probe;
-	int ret, probenum, devcnt, version, i, j;
-	uint64_t tmp_u64, total_probes, enabled_probes, p;
-	char **sections, **keys, *metafile, *val, s[11];
-	char probename[SR_MAX_PROBENAME_LEN + 1];
+	int version, ret;
+	char s[11];
 
-	if (!filename) {
-		sr_err("%s: filename was NULL", __func__);
+	if (!filename)
 		return SR_ERR_ARG;
-	}
 
-	if (!(archive = zip_open(filename, 0, &ret))) {
-		sr_dbg("Failed to open session file: zip error %d", ret);
+	if (!(archive = zip_open(filename, 0, &ret)))
+		/* No logging: this can be used just to check if it's
+		 * a sigrok session file or not. */
 		return SR_ERR;
-	}
 
 	/* check "version" */
 	version = 0;
 	if (!(zf = zip_fopen(archive, "version", 0))) {
-		sr_dbg("Not a sigrok session file.");
+		sr_dbg("Not a sigrok session file: no version found.");
 		return SR_ERR;
 	}
-	if ((ret = zip_fread(zf, s, 10)) == -1) {
-		sr_dbg("Not a valid sigrok session file.");
+	if ((ret = zip_fread(zf, s, 10)) == -1)
 		return SR_ERR;
-	}
 	zip_fclose(zf);
 	s[ret] = 0;
 	version = strtoull(s, NULL, 10);
 	if (version != 1) {
-		sr_dbg("Not a valid sigrok session file version.");
+		sr_dbg("Cannot handle sigrok session file version %d.", version);
 		return SR_ERR;
 	}
 
@@ -108,6 +90,41 @@ SR_API int sr_session_load(const char *filename)
 		return SR_ERR;
 	}
 
+	return SR_OK;
+}
+
+/**
+ * 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_inst *sdi;
+	struct sr_probe *probe;
+	int ret, probenum, devcnt, i, j;
+	uint64_t tmp_u64, total_probes, enabled_probes, p;
+	char **sections, **keys, *metafile, *val;
+	char probename[SR_MAX_PROBENAME_LEN + 1];
+
+	if ((ret = sr_sessionfile_check(filename)) != SR_OK)
+		return ret;
+
+	if (!(archive = zip_open(filename, 0, &ret)))
+		return SR_ERR;
+
+	if (zip_stat(archive, "metadata", 0, &zs) == -1)
+		return SR_ERR;
+
 	if (!(metafile = g_try_malloc(zs.size))) {
 		sr_err("%s: metafile malloc failed", __func__);
 		return SR_ERR_MALLOC;
@@ -306,4 +323,65 @@ SR_API int sr_session_save(const char *filename, const struct sr_dev_inst *sdi,
 	return SR_OK;
 }
 
+/**
+ * Append data to an existing session file.
+ *
+ * @param filename The name of the filename to append to. Must not be NULL.
+ * @param buf The data to be appended.
+ * @param unitsize The number of bytes per sample.
+ * @param units The number of samples.
+ *
+ * @return SR_OK upon success, SR_ERR_ARG upon invalid arguments, or SR_ERR
+ *         upon other errors.
+ */
+SR_API int sr_session_append(const char *filename, unsigned char *buf,
+		int unitsize, int units)
+{
+	struct zip *archive;
+	struct zip_source *logicsrc;
+	zip_int64_t num_files;
+	int chunk_num, next_chunk_num, ret, i;
+	const char *entry_name;
+	char chunkname[16];
+
+	if ((ret = sr_sessionfile_check(filename)) != SR_OK)
+		return ret;
+
+	if (!(archive = zip_open(filename, 0, &ret)))
+		return SR_ERR;
+
+	next_chunk_num = 1;
+	num_files = zip_get_num_entries(archive, 0);
+	for (i = 0; i < num_files; i++) {
+		entry_name = zip_get_name(archive, i, 0);
+		if (strncmp(entry_name, "logic-1", 7))
+			continue;
+		if (strlen(entry_name) == 7) {
+			/* This file has no extra chunks, just a single "logic-1".
+			 * Rename it to "logic-1-1" * and continue with chunk 2. */
+			if (zip_rename(archive, i, "logic-1-1") == -1) {
+				sr_err("Failed to rename 'logic-1' to 'logic-1-1'.");
+				return SR_ERR;
+			}
+			next_chunk_num = 2;
+			break;
+		} else if (strlen(entry_name) > 8 && entry_name[7] == '-') {
+			chunk_num = strtoull(entry_name + 8, NULL, 10);
+			if (chunk_num >= next_chunk_num)
+				next_chunk_num = chunk_num + 1;
+		}
+	}
+	snprintf(chunkname, 15, "logic-1-%d", next_chunk_num);
+	if (!(logicsrc = zip_source_buffer(archive, buf, units * unitsize, FALSE)))
+		return SR_ERR;
+	if (zip_add(archive, chunkname, logicsrc) == -1)
+		return SR_ERR;
+	if ((ret = zip_close(archive)) == -1) {
+		sr_info("error saving session file: %s", zip_strerror(archive));
+		return SR_ERR;
+	}
+
+	return SR_OK;
+}
+
 /** @} */