| 1 | /* |
| 2 | * ctf_events.c |
| 3 | * |
| 4 | * Babeltrace Library |
| 5 | * |
| 6 | * Copyright 2011-2012 EfficiOS Inc. and Linux Foundation |
| 7 | * |
| 8 | * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
| 9 | * Julien Desfossez <julien.desfossez@efficios.com> |
| 10 | * |
| 11 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 12 | * of this software and associated documentation files (the "Software"), to deal |
| 13 | * in the Software without restriction, including without limitation the rights |
| 14 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 15 | * copies of the Software, and to permit persons to whom the Software is |
| 16 | * furnished to do so, subject to the following conditions: |
| 17 | * |
| 18 | * The above copyright notice and this permission notice shall be included in |
| 19 | * all copies or substantial portions of the Software. |
| 20 | */ |
| 21 | |
| 22 | #include <babeltrace/babeltrace.h> |
| 23 | #include <babeltrace/format.h> |
| 24 | #include <babeltrace/ctf/events.h> |
| 25 | #include <babeltrace/ctf-ir/metadata.h> |
| 26 | #include <glib.h> |
| 27 | |
| 28 | /* |
| 29 | * thread local storage to store the last error that occured |
| 30 | * while reading a field, this variable must be accessed by |
| 31 | * bt_ctf_field_error only |
| 32 | */ |
| 33 | __thread int bt_ctf_last_field_error = 0; |
| 34 | |
| 35 | struct definition *bt_ctf_get_top_level_scope(struct bt_ctf_event *event, |
| 36 | enum bt_ctf_scope scope) |
| 37 | { |
| 38 | struct definition *tmp = NULL; |
| 39 | |
| 40 | switch (scope) { |
| 41 | case BT_TRACE_PACKET_HEADER: |
| 42 | if (!event->stream) |
| 43 | goto error; |
| 44 | if (event->stream->trace_packet_header) |
| 45 | tmp = &event->stream->trace_packet_header->p; |
| 46 | break; |
| 47 | case BT_STREAM_PACKET_CONTEXT: |
| 48 | if (!event->stream) |
| 49 | goto error; |
| 50 | if (event->stream->stream_packet_context) |
| 51 | tmp = &event->stream->stream_packet_context->p; |
| 52 | break; |
| 53 | case BT_STREAM_EVENT_HEADER: |
| 54 | if (!event->stream) |
| 55 | goto error; |
| 56 | if (event->stream->stream_event_header) |
| 57 | tmp = &event->stream->stream_event_header->p; |
| 58 | break; |
| 59 | case BT_STREAM_EVENT_CONTEXT: |
| 60 | if (!event->stream) |
| 61 | goto error; |
| 62 | if (event->stream->stream_event_context) |
| 63 | tmp = &event->stream->stream_event_context->p; |
| 64 | break; |
| 65 | case BT_EVENT_CONTEXT: |
| 66 | if (!event->event) |
| 67 | goto error; |
| 68 | if (event->event->event_context) |
| 69 | tmp = &event->event->event_context->p; |
| 70 | break; |
| 71 | case BT_EVENT_FIELDS: |
| 72 | if (!event->event) |
| 73 | goto error; |
| 74 | if (event->event->event_fields) |
| 75 | tmp = &event->event->event_fields->p; |
| 76 | break; |
| 77 | } |
| 78 | return tmp; |
| 79 | |
| 80 | error: |
| 81 | return NULL; |
| 82 | } |
| 83 | |
| 84 | struct definition *bt_ctf_get_field(struct bt_ctf_event *event, |
| 85 | struct definition *scope, |
| 86 | const char *field) |
| 87 | { |
| 88 | struct definition *def; |
| 89 | |
| 90 | if (scope) { |
| 91 | def = lookup_definition(scope, field); |
| 92 | if (bt_ctf_field_type(def) == CTF_TYPE_VARIANT) { |
| 93 | struct definition_variant *variant_definition; |
| 94 | variant_definition = container_of(def, |
| 95 | struct definition_variant, p); |
| 96 | return variant_definition->current_field; |
| 97 | } |
| 98 | return def; |
| 99 | } |
| 100 | return NULL; |
| 101 | } |
| 102 | |
| 103 | struct definition *bt_ctf_get_index(struct bt_ctf_event *event, |
| 104 | struct definition *field, |
| 105 | unsigned int index) |
| 106 | { |
| 107 | struct definition *ret = NULL; |
| 108 | |
| 109 | if (bt_ctf_field_type(field) == CTF_TYPE_ARRAY) { |
| 110 | struct definition_array *array_definition; |
| 111 | array_definition = container_of(field, |
| 112 | struct definition_array, p); |
| 113 | ret = array_index(array_definition, index); |
| 114 | } else if (bt_ctf_field_type(field) == CTF_TYPE_SEQUENCE) { |
| 115 | struct definition_sequence *sequence_definition; |
| 116 | sequence_definition = container_of(field, |
| 117 | struct definition_sequence, p); |
| 118 | ret = sequence_index(sequence_definition, index); |
| 119 | } |
| 120 | return ret; |
| 121 | } |
| 122 | |
| 123 | const char *bt_ctf_event_name(struct bt_ctf_event *event) |
| 124 | { |
| 125 | struct ctf_event *event_class; |
| 126 | struct ctf_stream_class *stream_class; |
| 127 | |
| 128 | if (!event) |
| 129 | return NULL; |
| 130 | stream_class = event->stream->stream_class; |
| 131 | event_class = g_ptr_array_index(stream_class->events_by_id, |
| 132 | event->stream->event_id); |
| 133 | return g_quark_to_string(event_class->name); |
| 134 | } |
| 135 | |
| 136 | const char *bt_ctf_field_name(const struct definition *def) |
| 137 | { |
| 138 | if (def) |
| 139 | return g_quark_to_string(def->name); |
| 140 | return NULL; |
| 141 | } |
| 142 | |
| 143 | enum ctf_type_id bt_ctf_field_type(struct definition *def) |
| 144 | { |
| 145 | if (def) |
| 146 | return def->declaration->id; |
| 147 | return CTF_TYPE_UNKNOWN; |
| 148 | } |
| 149 | |
| 150 | int bt_ctf_get_field_list(struct bt_ctf_event *event, |
| 151 | struct definition *scope, |
| 152 | struct definition const * const **list, |
| 153 | unsigned int *count) |
| 154 | { |
| 155 | switch (bt_ctf_field_type(scope)) { |
| 156 | case CTF_TYPE_INTEGER: |
| 157 | case CTF_TYPE_FLOAT: |
| 158 | case CTF_TYPE_STRING: |
| 159 | case CTF_TYPE_ENUM: |
| 160 | goto error; |
| 161 | case CTF_TYPE_STRUCT: |
| 162 | { |
| 163 | struct definition_struct *def_struct; |
| 164 | |
| 165 | def_struct = container_of(scope, struct definition_struct, p); |
| 166 | if (!def_struct) |
| 167 | goto error; |
| 168 | if (def_struct->fields->pdata) { |
| 169 | *list = (struct definition const* const*) def_struct->fields->pdata; |
| 170 | *count = def_struct->fields->len; |
| 171 | goto end; |
| 172 | } else { |
| 173 | goto error; |
| 174 | } |
| 175 | } |
| 176 | case CTF_TYPE_UNTAGGED_VARIANT: |
| 177 | goto error; |
| 178 | case CTF_TYPE_VARIANT: |
| 179 | { |
| 180 | struct definition_variant *def_variant; |
| 181 | |
| 182 | def_variant = container_of(scope, struct definition_variant, p); |
| 183 | if (!def_variant) |
| 184 | goto error; |
| 185 | if (def_variant->fields->pdata) { |
| 186 | *list = (struct definition const* const*) def_variant->fields->pdata; |
| 187 | *count = def_variant->fields->len; |
| 188 | goto end; |
| 189 | } else { |
| 190 | goto error; |
| 191 | } |
| 192 | } |
| 193 | case CTF_TYPE_ARRAY: |
| 194 | { |
| 195 | struct definition_array *def_array; |
| 196 | |
| 197 | def_array = container_of(scope, struct definition_array, p); |
| 198 | if (!def_array) |
| 199 | goto error; |
| 200 | if (def_array->elems->pdata) { |
| 201 | *list = (struct definition const* const*) def_array->elems->pdata; |
| 202 | *count = def_array->elems->len; |
| 203 | goto end; |
| 204 | } else { |
| 205 | goto error; |
| 206 | } |
| 207 | } |
| 208 | case CTF_TYPE_SEQUENCE: |
| 209 | { |
| 210 | struct definition_sequence *def_sequence; |
| 211 | |
| 212 | def_sequence = container_of(scope, struct definition_sequence, p); |
| 213 | if (!def_sequence) |
| 214 | goto error; |
| 215 | if (def_sequence->elems->pdata) { |
| 216 | *list = (struct definition const* const*) def_sequence->elems->pdata; |
| 217 | *count = def_sequence->elems->len; |
| 218 | goto end; |
| 219 | } else { |
| 220 | goto error; |
| 221 | } |
| 222 | } |
| 223 | default: |
| 224 | break; |
| 225 | } |
| 226 | |
| 227 | end: |
| 228 | return 0; |
| 229 | |
| 230 | error: |
| 231 | *list = NULL; |
| 232 | *count = 0; |
| 233 | return -1; |
| 234 | } |
| 235 | |
| 236 | uint64_t bt_ctf_get_timestamp(struct bt_ctf_event *event) |
| 237 | { |
| 238 | if (event && event->stream->has_timestamp) |
| 239 | return event->stream->timestamp; |
| 240 | else |
| 241 | return 0; |
| 242 | } |
| 243 | |
| 244 | static void bt_ctf_field_set_error(int error) |
| 245 | { |
| 246 | bt_ctf_last_field_error = error; |
| 247 | } |
| 248 | |
| 249 | int bt_ctf_field_get_error(void) |
| 250 | { |
| 251 | int ret; |
| 252 | ret = bt_ctf_last_field_error; |
| 253 | bt_ctf_last_field_error = 0; |
| 254 | |
| 255 | return ret; |
| 256 | } |
| 257 | |
| 258 | uint64_t bt_ctf_get_uint64(struct definition *field) |
| 259 | { |
| 260 | unsigned int ret = 0; |
| 261 | |
| 262 | if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) |
| 263 | ret = get_unsigned_int(field); |
| 264 | else |
| 265 | bt_ctf_field_set_error(-EINVAL); |
| 266 | |
| 267 | return ret; |
| 268 | } |
| 269 | |
| 270 | int64_t bt_ctf_get_int64(struct definition *field) |
| 271 | { |
| 272 | int ret = 0; |
| 273 | |
| 274 | if (field && bt_ctf_field_type(field) == CTF_TYPE_INTEGER) |
| 275 | ret = get_signed_int(field); |
| 276 | else |
| 277 | bt_ctf_field_set_error(-EINVAL); |
| 278 | |
| 279 | return ret; |
| 280 | |
| 281 | } |
| 282 | |
| 283 | char *bt_ctf_get_char_array(struct definition *field) |
| 284 | { |
| 285 | char *ret = NULL; |
| 286 | |
| 287 | if (field && bt_ctf_field_type(field) == CTF_TYPE_ARRAY) |
| 288 | ret = get_char_array(field)->str; |
| 289 | else |
| 290 | bt_ctf_field_set_error(-EINVAL); |
| 291 | |
| 292 | return ret; |
| 293 | } |
| 294 | |
| 295 | char *bt_ctf_get_string(struct definition *field) |
| 296 | { |
| 297 | char *ret = NULL; |
| 298 | |
| 299 | if (field && bt_ctf_field_type(field) == CTF_TYPE_STRING) |
| 300 | ret = get_string(field); |
| 301 | else |
| 302 | bt_ctf_field_set_error(-EINVAL); |
| 303 | |
| 304 | return ret; |
| 305 | } |