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1e649dff | 1 | /* |
0235b0db | 2 | * SPDX-License-Identifier: MIT |
1e649dff | 3 | * |
0235b0db | 4 | * Copyright 2016-2017 Philippe Proulx <pproulx@efficios.com> |
1e649dff PP |
5 | */ |
6 | ||
0235b0db MJ |
7 | #ifndef _METADATA_DECODER_H |
8 | #define _METADATA_DECODER_H | |
9 | ||
1e649dff | 10 | #include <stdint.h> |
a2a54545 | 11 | #include <stdbool.h> |
087cd0f5 | 12 | #include <stdio.h> |
1e649dff | 13 | |
3fadfbc0 | 14 | #include <babeltrace2/babeltrace.h> |
1e649dff | 15 | |
91d81473 | 16 | #include "common/macros.h" |
06be9946 PP |
17 | #include "common/uuid.h" |
18 | ||
19 | struct ctf_trace_class; | |
91d81473 | 20 | |
1e649dff PP |
21 | /* A CTF metadata decoder object */ |
22 | struct ctf_metadata_decoder; | |
23 | ||
24 | /* CTF metadata decoder status */ | |
25 | enum ctf_metadata_decoder_status { | |
26 | CTF_METADATA_DECODER_STATUS_OK = 0, | |
1a6da3f9 | 27 | CTF_METADATA_DECODER_STATUS_NONE = 1, |
1e649dff PP |
28 | CTF_METADATA_DECODER_STATUS_ERROR = -1, |
29 | CTF_METADATA_DECODER_STATUS_INCOMPLETE = -2, | |
30 | CTF_METADATA_DECODER_STATUS_INVAL_VERSION = -3, | |
31 | CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR = -4, | |
32 | }; | |
33 | ||
a2a54545 PP |
34 | /* Decoding configuration */ |
35 | struct ctf_metadata_decoder_config { | |
06be9946 | 36 | /* Active log level to use */ |
0746848c | 37 | bt_logging_level log_level; |
f7b785ac | 38 | |
50f6fce8 SM |
39 | /* |
40 | * Component or component class to use for logging (exactly one of | |
41 | * them must be non-`NULL`); weak | |
42 | */ | |
f7b785ac | 43 | bt_self_component *self_comp; |
50f6fce8 | 44 | bt_self_component_class *self_comp_class; |
f7b785ac | 45 | |
06be9946 | 46 | /* Additional clock class offset to apply */ |
a2a54545 PP |
47 | int64_t clock_class_offset_s; |
48 | int64_t clock_class_offset_ns; | |
c0aa240b | 49 | bool force_clock_class_origin_unix_epoch; |
06be9946 PP |
50 | |
51 | /* True to create trace class objects */ | |
52 | bool create_trace_class; | |
53 | ||
54 | /* | |
55 | * True to keep the plain text when content is appended with | |
56 | * ctf_metadata_decoder_append_content(). | |
57 | */ | |
58 | bool keep_plain_text; | |
a2a54545 PP |
59 | }; |
60 | ||
1e649dff | 61 | /* |
862ca4ed | 62 | * Creates a CTF metadata decoder. |
1e649dff PP |
63 | * |
64 | * Returns `NULL` on error. | |
65 | */ | |
66 | BT_HIDDEN | |
55314f2a | 67 | struct ctf_metadata_decoder *ctf_metadata_decoder_create( |
862ca4ed | 68 | const struct ctf_metadata_decoder_config *config); |
1e649dff PP |
69 | |
70 | /* | |
71 | * Destroys a CTF metadata decoder that you created with | |
72 | * ctf_metadata_decoder_create(). | |
73 | */ | |
74 | BT_HIDDEN | |
75 | void ctf_metadata_decoder_destroy( | |
76 | struct ctf_metadata_decoder *metadata_decoder); | |
77 | ||
78 | /* | |
06be9946 | 79 | * Appends content to the metadata decoder. |
1e649dff PP |
80 | * |
81 | * This function reads the metadata from the current position of `fp` | |
06be9946 | 82 | * until the end of this file stream. |
1e649dff PP |
83 | * |
84 | * The metadata can be packetized or not. | |
85 | * | |
06be9946 PP |
86 | * The metadata chunk needs to be complete and lexically scannable, that |
87 | * is, zero or more complete top-level blocks. If it's incomplete, this | |
1e649dff PP |
88 | * function returns `CTF_METADATA_DECODER_STATUS_INCOMPLETE`. If this |
89 | * function returns `CTF_METADATA_DECODER_STATUS_INCOMPLETE`, then you | |
06be9946 | 90 | * need to call it again with the _same_ metadata and more to make it |
1e649dff PP |
91 | * complete. For example: |
92 | * | |
93 | * First call: event { name = hell | |
94 | * Second call: event { name = hello_world; ... }; | |
95 | * | |
1e649dff PP |
96 | * If everything goes as expected, this function returns |
97 | * `CTF_METADATA_DECODER_STATUS_OK`. | |
98 | */ | |
99 | BT_HIDDEN | |
06be9946 | 100 | enum ctf_metadata_decoder_status ctf_metadata_decoder_append_content( |
1e649dff PP |
101 | struct ctf_metadata_decoder *metadata_decoder, FILE *fp); |
102 | ||
06be9946 PP |
103 | /* |
104 | * Returns the trace IR trace class of this metadata decoder (new | |
105 | * reference). | |
106 | * | |
107 | * Returns `NULL` if there's none yet or if the metadata decoder is not | |
108 | * configured to create trace classes. | |
109 | */ | |
1e649dff | 110 | BT_HIDDEN |
b19ff26f | 111 | bt_trace_class *ctf_metadata_decoder_get_ir_trace_class( |
44c440bc PP |
112 | struct ctf_metadata_decoder *mdec); |
113 | ||
06be9946 PP |
114 | /* |
115 | * Returns the CTF IR trace class of this metadata decoder. | |
116 | * | |
117 | * Returns `NULL` if there's none yet or if the metadata decoder is not | |
118 | * configured to create trace classes. | |
119 | */ | |
44c440bc PP |
120 | BT_HIDDEN |
121 | struct ctf_trace_class *ctf_metadata_decoder_borrow_ctf_trace_class( | |
122 | struct ctf_metadata_decoder *mdec); | |
1e649dff PP |
123 | |
124 | /* | |
06be9946 PP |
125 | * Checks whether or not a given metadata file stream `fp` is |
126 | * packetized, setting `is_packetized` accordingly on success. On | |
127 | * success, also sets `*byte_order` to the byte order of the first | |
128 | * packet. | |
129 | * | |
130 | * This function uses `log_level` and `self_comp` for logging purposes. | |
131 | * `self_comp` can be `NULL` if not available. | |
1e649dff PP |
132 | */ |
133 | BT_HIDDEN | |
06be9946 PP |
134 | int ctf_metadata_decoder_is_packetized(FILE *fp, bool *is_packetized, |
135 | int *byte_order, bt_logging_level log_level, | |
f7b785ac | 136 | bt_self_component *self_comp); |
1e649dff PP |
137 | |
138 | /* | |
06be9946 PP |
139 | * Returns the byte order of the decoder's metadata stream as set by the |
140 | * last call to ctf_metadata_decoder_append_content(). | |
141 | * | |
142 | * Returns -1 if unknown (plain text content). | |
1e649dff PP |
143 | */ |
144 | BT_HIDDEN | |
06be9946 PP |
145 | int ctf_metadata_decoder_get_byte_order(struct ctf_metadata_decoder *mdec); |
146 | ||
147 | /* | |
148 | * Returns the UUID of the decoder's metadata stream as set by the last | |
149 | * call to ctf_metadata_decoder_append_content(). | |
1a6da3f9 PP |
150 | */ |
151 | BT_HIDDEN | |
152 | int ctf_metadata_decoder_get_uuid( | |
153 | struct ctf_metadata_decoder *mdec, bt_uuid_t uuid); | |
154 | ||
155 | /* | |
156 | * Returns the UUID of the decoder's trace class, if available. | |
06be9946 | 157 | * |
1a6da3f9 PP |
158 | * Returns: |
159 | * | |
160 | * * `CTF_METADATA_DECODER_STATUS_OK`: success. | |
161 | * * `CTF_METADATA_DECODER_STATUS_NONE`: no UUID. | |
162 | * * `CTF_METADATA_DECODER_STATUS_INCOMPLETE`: missing metadata content. | |
06be9946 PP |
163 | */ |
164 | BT_HIDDEN | |
1a6da3f9 PP |
165 | enum ctf_metadata_decoder_status ctf_metadata_decoder_get_trace_class_uuid( |
166 | struct ctf_metadata_decoder *mdec, bt_uuid_t uuid); | |
06be9946 PP |
167 | |
168 | /* | |
169 | * Returns the metadata decoder's current metadata text. | |
170 | */ | |
171 | BT_HIDDEN | |
172 | const char *ctf_metadata_decoder_get_text(struct ctf_metadata_decoder *mdec); | |
1e649dff | 173 | |
3c8252a5 PP |
174 | static inline |
175 | bool ctf_metadata_decoder_is_packet_version_valid(unsigned int major, | |
176 | unsigned int minor) | |
177 | { | |
178 | return major == 1 && minor == 8; | |
179 | } | |
180 | ||
1e649dff | 181 | #endif /* _METADATA_DECODER_H */ |