Specify callback to move packet in open_trace

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

diff --git a/formats/ctf/ctf.c b/formats/ctf/ctf.c
index 0d1418c1b33cf7bc471c6a692e69309cd7729bff..93d13e8a5bc5bfcbfefe75529181fe5d41ab8fc0 100644 (file)
--- a/formats/ctf/ctf.c
+++ b/formats/ctf/ctf.c
@@ -55,7 +55,9 @@
 extern int yydebug;
 
 static
-struct trace_descriptor *ctf_open_trace(const char *path, int flags);
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+               void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                       int whence));
 static
 void ctf_close_trace(struct trace_descriptor *descriptor);
 
@@ -609,7 +611,9 @@ int ctf_open_trace_metadata_stream_read(struct ctf_trace *td, FILE **fp,
 }
 
 static
-int ctf_open_trace_metadata_read(struct ctf_trace *td)
+int ctf_open_trace_metadata_read(struct ctf_trace *td,
+               void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                       int whence))
 {
        struct ctf_scanner *scanner;
        struct ctf_file_stream *metadata_stream;
@@ -618,6 +622,15 @@ int ctf_open_trace_metadata_read(struct ctf_trace *td)
        int ret = 0;
 
        metadata_stream = g_new0(struct ctf_file_stream, 1);
+
+       if (move_pos_slow) {
+               metadata_stream->pos.move_pos_slow = move_pos_slow;
+       } else {
+               fprintf(stderr, "[error] move_pos_slow function undefined.\n");
+               ret = -1;
+               goto end_stream;
+       }
+
        td->metadata = &metadata_stream->parent;
        metadata_stream->pos.fd = openat(td->dirfd, "metadata", O_RDONLY);
        if (metadata_stream->pos.fd < 0) {
@@ -1083,7 +1096,9 @@ error:
  * description (metadata).
  */
 static
-int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
+int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags,
+               void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                       int whence))
 {
        int ret;
        struct ctf_file_stream *file_stream;
@@ -1092,6 +1107,15 @@ int ctf_open_file_stream_read(struct ctf_trace *td, const char *path, int flags)
        if (ret < 0)
                goto error;
        file_stream = g_new0(struct ctf_file_stream, 1);
+
+       if (move_pos_slow) {
+               file_stream->pos.move_pos_slow = move_pos_slow;
+       } else {
+               fprintf(stderr, "[error] move_pos_slow function undefined.\n");
+               ret = -1;
+               goto error_def;
+       }
+
        ctf_init_pos(&file_stream->pos, ret, flags);
        ret = create_trace_definitions(td, &file_stream->parent);
        if (ret)
@@ -1116,7 +1140,9 @@ error:
 }
 
 static
-int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
+int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags,
+               void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                       int whence))
 {
        int ret;
        struct dirent *dirent;
@@ -1144,7 +1170,7 @@ int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
         * Keep the metadata file separate.
         */
 
-       ret = ctf_open_trace_metadata_read(td);
+       ret = ctf_open_trace_metadata_read(td, move_pos_slow);
        if (ret) {
                goto error_metadata;
        }
@@ -1173,7 +1199,7 @@ int ctf_open_trace_read(struct ctf_trace *td, const char *path, int flags)
                                || !strcmp(diriter->d_name, "..")
                                || !strcmp(diriter->d_name, "metadata"))
                        continue;
-               ret = ctf_open_file_stream_read(td, diriter->d_name, flags);
+               ret = ctf_open_file_stream_read(td, diriter->d_name, flags, move_pos_slow);
                if (ret) {
                        fprintf(stdout, "[error] Open file stream error.\n");
                        goto readdir_error;
@@ -1194,7 +1220,9 @@ error:
 }
 
 static
-struct trace_descriptor *ctf_open_trace(const char *path, int flags)
+struct trace_descriptor *ctf_open_trace(const char *path, int flags,
+               void (*move_pos_slow)(struct ctf_stream_pos *pos, size_t offset,
+                       int whence))
 {
        struct ctf_trace *td;
        int ret;
@@ -1207,7 +1235,7 @@ struct trace_descriptor *ctf_open_trace(const char *path, int flags)
                        fprintf(stdout, "[error] Path missing for input CTF trace.\n");
                        goto error;
                }
-               ret = ctf_open_trace_read(td, path, flags);
+               ret = ctf_open_trace_read(td, path, flags, move_pos_slow);
                if (ret)
                        goto error;
                break;