Move ctf-metadata plugin into its own shared object

[babeltrace.git] / formats / ctf-metadata / ctf-metadata.c

diff --git a/formats/ctf-metadata/ctf-metadata.c b/formats/ctf-metadata/ctf-metadata.c
new file mode 100644 (file)
index 0000000..578e8da
--- /dev/null
+++ b/formats/ctf-metadata/ctf-metadata.c
@@ -0,0 +1,143 @@
+/*
+ * BabelTrace - Common Trace Format (CTF)
+ *
+ * CTF Metadata Dump.
+ *
+ * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
+ *
+ * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include <babeltrace/format.h>
+#include <babeltrace/ctf-text/types.h>
+#include <babeltrace/babeltrace-internal.h>
+#include <babeltrace/ctf/events-internal.h>
+#include <inttypes.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <dirent.h>
+#include <glib.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+static
+struct bt_trace_descriptor *ctf_metadata_open_trace(const char *path, int flags,
+               void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
+                       int whence), FILE *metadata_fp);
+static
+int ctf_metadata_close_trace(struct bt_trace_descriptor *descriptor);
+
+static
+struct bt_format ctf_metadata_format = {
+       .open_trace = ctf_metadata_open_trace,
+       .close_trace = ctf_metadata_close_trace,
+};
+
+static
+int ctf_metadata_trace_pre_handler(struct bt_stream_pos *ppos,
+                       struct bt_trace_descriptor *td)
+{
+       struct ctf_text_stream_pos *pos =
+               container_of(ppos, struct ctf_text_stream_pos, parent);
+       struct ctf_trace *trace;
+
+       trace = container_of(td, struct ctf_trace, parent);
+       if (!trace->metadata_string)
+               return -EINVAL;
+       if (trace->metadata_packetized) {
+               fprintf(pos->fp, "/* CTF %u.%u */\n",
+                       BT_CTF_MAJOR, BT_CTF_MINOR);
+       }
+       fprintf(pos->fp, "%s", trace->metadata_string);
+       return 0;
+}
+
+static
+struct bt_trace_descriptor *ctf_metadata_open_trace(const char *path, int flags,
+               void (*packet_seek)(struct bt_stream_pos *pos, size_t index,
+                       int whence), FILE *metadata_fp)
+{
+       struct ctf_text_stream_pos *pos;
+       FILE *fp;
+
+       pos = g_new0(struct ctf_text_stream_pos, 1);
+
+       pos->last_real_timestamp = -1ULL;
+       pos->last_cycles_timestamp = -1ULL;
+       switch (flags & O_ACCMODE) {
+       case O_RDWR:
+               if (!path)
+                       fp = stdout;
+               else
+                       fp = fopen(path, "w");
+               if (!fp)
+                       goto error;
+               pos->fp = fp;
+               pos->parent.pre_trace_cb = ctf_metadata_trace_pre_handler;
+               pos->print_names = 0;
+               break;
+       case O_RDONLY:
+       default:
+               fprintf(stderr, "[error] Incorrect open flags.\n");
+               goto error;
+       }
+
+       return &pos->trace_descriptor;
+error:
+       g_free(pos);
+       return NULL;
+}
+
+static
+int ctf_metadata_close_trace(struct bt_trace_descriptor *td)
+{
+       int ret;
+       struct ctf_text_stream_pos *pos =
+               container_of(td, struct ctf_text_stream_pos, trace_descriptor);
+       if (pos->fp != stdout) {
+               ret = fclose(pos->fp);
+               if (ret) {
+                       perror("Error on fclose");
+                       return -1;
+               }
+       }
+       g_free(pos);
+       return 0;
+}
+
+static
+void __attribute__((constructor)) ctf_metadata_init(void)
+{
+       int ret;
+
+       ctf_metadata_format.name = g_quark_from_static_string("ctf-metadata");
+       ret = bt_register_format(&ctf_metadata_format);
+       assert(!ret);
+}
+
+static
+void __attribute__((destructor)) ctf_metadata_exit(void)
+{
+       bt_unregister_format(&ctf_metadata_format);
+}