formats/ctf-text/ctf-text.c

   1 /*
   2  * BabelTrace - Common Trace Format (CTF)
   3  *
   4  * CTF Text Format registration.
   5  *
   6  * Copyright 2010, 2011 - 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 <babeltrace/format.h>
  20 #include <babeltrace/ctf-text/types.h>
  21 #include <babeltrace/babeltrace.h>
  22 #include <inttypes.h>
  23 #include <uuid/uuid.h>
  24 #include <sys/mman.h>
  25 #include <errno.h>
  26 #include <sys/types.h>
  27 #include <sys/stat.h>
  28 #include <fcntl.h>
  29 #include <dirent.h>
  30 #include <glib.h>
  31 #include <unistd.h>
  32 #include <stdlib.h>
  33
  34 struct trace_descriptor *ctf_text_open_trace(const char *path, int flags);
  35 void ctf_text_close_trace(struct trace_descriptor *descriptor);
  36
  37 static
  38 rw_dispatch read_dispatch_table[] = {
  39         /* All unimplemented */
  40 };
  41
  42 static
  43 rw_dispatch write_dispatch_table[] = {
  44         [ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
  45         [ CTF_TYPE_FLOAT ] = ctf_text_float_write,
  46         [ CTF_TYPE_ENUM ] = ctf_text_enum_write,
  47         [ CTF_TYPE_STRING ] = ctf_text_string_write,
  48         [ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
  49         [ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
  50         [ CTF_TYPE_ARRAY ] = ctf_text_array_write,
  51         [ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
  52 };
  53
  54 static
  55 struct format ctf_text_format = {
  56         .open_trace = ctf_text_open_trace,
  57         .close_trace = ctf_text_close_trace,
  58 };
  59
  60 struct trace_descriptor *ctf_text_open_trace(const char *path, int flags)
  61 {
  62         struct ctf_text_stream_pos *pos;
  63         FILE *fp;
  64
  65         pos = g_new0(struct ctf_text_stream_pos, 1);
  66
  67         switch (flags & O_ACCMODE) {
  68         case O_WRONLY:
  69                 if (!path)
  70                         path = "/dev/stdout";
  71                 fp = fopen(path, "w");
  72                 if (!fp)
  73                         goto error;
  74                 pos->fp = fp;
  75                 pos->parent.rw_table = write_dispatch_table;
  76                 break;
  77         case O_RDONLY:
  78         default:
  79                 fprintf(stdout, "[error] Incorrect open flags.\n");
  80                 goto error;
  81         }
  82
  83         return &pos->trace_descriptor;
  84 error:
  85         g_free(pos);
  86         return NULL;
  87 }
  88
  89 void ctf_text_close_trace(struct trace_descriptor *td)
  90 {
  91         struct ctf_text_stream_pos *pos =
  92                 container_of(td, struct ctf_text_stream_pos, trace_descriptor);
  93         fclose(pos->fp);
  94         g_free(pos);
  95 }
  96
  97 void __attribute__((constructor)) ctf_text_init(void)
  98 {
  99         int ret;
 100
 101         ctf_text_format.name = g_quark_from_static_string("text");
 102         ret = bt_register_format(&ctf_text_format);
 103         assert(!ret);
 104 }
 105
 106 /* TODO: finalize */