converter/babeltrace-lib.c

   1 /*
   2  * babeltrace-lib.c
   3  *
   4  * Babeltrace Trace Converter Library
   5  *
   6  * Copyright 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a copy
   9  * of this software and associated documentation files (the "Software"), to deal
  10  * in the Software without restriction, including without limitation the rights
  11  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  12  * copies of the Software, and to permit persons to whom the Software is
  13  * furnished to do so, subject to the following conditions:
  14  *
  15  * The above copyright notice and this permission notice shall be included in
  16  * all copies or substantial portions of the Software.
  17  */
  18
  19 #include <stdlib.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <inttypes.h>
  23 #include <babeltrace/babeltrace.h>
  24 #include <babeltrace/format.h>
  25 #include <babeltrace/ctf/types.h>
  26 #include <babeltrace/ctf/metadata.h>
  27 #include <babeltrace/ctf-text/types.h>
  28
  29 static
  30 int convert_event(struct ctf_text_stream_pos *sout,
  31                   struct ctf_file_stream *sin)
  32 {
  33         struct ctf_stream *stream_class = sin->stream;
  34         struct ctf_event *event_class;
  35         uint64_t id = 0;
  36         int len_index;
  37
  38         if (sin->pos.offset == -EOF)
  39                 return -EOF;
  40
  41         /* Hide event payload struct brackets */
  42         sout->depth = -1;
  43
  44         /* Read and print event header */
  45         if (stream_class->event_header) {
  46                 generic_rw(&sin->pos.parent, &stream_class->event_header->p);
  47
  48                 /* lookup event id */
  49                 len_index = struct_declaration_lookup_field_index(stream_class->event_header_decl,
  50                                 g_quark_from_static_string("id"));
  51                 if (len_index >= 0) {
  52                         struct definition_integer *defint;
  53                         struct field *field;
  54
  55                         field = struct_definition_get_field_from_index(stream_class->event_header, len_index);
  56                         assert(field->definition->declaration->id == CTF_TYPE_INTEGER);
  57                         defint = container_of(field->definition, struct definition_integer, p);
  58                         assert(defint->declaration->signedness == FALSE);
  59                         id = defint->value._unsigned;   /* set id */
  60                 }
  61
  62                 generic_rw(&sout->parent, &stream_class->event_header->p);
  63         }
  64
  65         /* Read and print stream-declared event context */
  66         if (stream_class->event_context) {
  67                 generic_rw(&sin->pos.parent, &stream_class->event_context->p);
  68                 generic_rw(&sout->parent, &stream_class->event_context->p);
  69         }
  70
  71         if (id >= stream_class->events_by_id->len) {
  72                 fprintf(stdout, "[error] Event id %" PRIu64 " is outside range.\n", id);
  73                 return -EINVAL;
  74         }
  75         event_class = g_ptr_array_index(stream_class->events_by_id, id);
  76         if (!event_class) {
  77                 fprintf(stdout, "[error] Event id %" PRIu64 " is unknown.\n", id);
  78                 return -EINVAL;
  79         }
  80
  81         /* Read and print event-declared event context */
  82         if (event_class->context) {
  83                 generic_rw(&sin->pos.parent, &event_class->context->p);
  84                 generic_rw(&sout->parent, &event_class->context->p);
  85         }
  86
  87         /* Read and print event payload */
  88         if (event_class->fields) {
  89                 generic_rw(&sin->pos.parent, &event_class->fields->p);
  90                 generic_rw(&sout->parent, &event_class->fields->p);
  91         }
  92
  93         return 0;
  94 }
  95
  96 static
  97 int convert_stream(struct ctf_text_stream_pos *sout,
  98                    struct ctf_file_stream *sin)
  99 {
 100         int ret;
 101
 102         /* For each event, print header, context, payload */
 103         /* TODO: order events by timestamps across streams */
 104         for (;;) {
 105                 ret = convert_event(sout, sin);
 106                 if (ret == -EOF)
 107                         break;
 108                 else if (ret) {
 109                         fprintf(stdout, "[error] Printing event failed.\n");
 110                         goto error;
 111                 }
 112         }
 113
 114         return 0;
 115
 116 error:
 117         return ret;
 118 }
 119
 120 int convert_trace(struct trace_descriptor *td_write,
 121                   struct trace_descriptor *td_read)
 122 {
 123         struct ctf_trace *tin = container_of(td_read, struct ctf_trace, parent);
 124         struct ctf_text_stream_pos *sout =
 125                 container_of(td_write, struct ctf_text_stream_pos, trace_descriptor);
 126         int stream_id, filenr;
 127         int ret;
 128
 129         /* For each stream (TODO: order events by timestamp) */
 130         for (stream_id = 0; stream_id < tin->streams->len; stream_id++) {
 131                 struct ctf_stream *stream = g_ptr_array_index(tin->streams, stream_id);
 132
 133                 if (!stream)
 134                         continue;
 135                 for (filenr = 0; filenr < stream->files->len; filenr++) {
 136                         struct ctf_file_stream *file_stream = g_ptr_array_index(stream->files, filenr);
 137                         ret = convert_stream(sout, file_stream);
 138                         if (ret) {
 139                                 fprintf(stdout, "[error] Printing stream %d failed.\n", stream_id);
 140                                 goto error;
 141                         }
 142                 }
 143         }
 144
 145         return 0;
 146
 147 error:
 148         return ret;
 149 }