-/**
- * 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;
-}
-