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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 | ||
087cd0f5 | 10 | #include <stdio.h> |
1e649dff | 11 | |
3fadfbc0 | 12 | #include <babeltrace2/babeltrace.h> |
1e649dff | 13 | |
06be9946 | 14 | #include "common/uuid.h" |
70923576 | 15 | #include "cpp-common/bt2/trace-ir.hpp" |
0f5c5d5c SM |
16 | #include "cpp-common/bt2c/logging.hpp" |
17 | #include "cpp-common/vendor/fmt/format.h" /* IWYU pragma: keep */ | |
06be9946 | 18 | |
c942e7a2 SM |
19 | #include "../../../src/clk-cls-cfg.hpp" |
20 | ||
21 | /* A CTF metadata decoder object */ | |
22 | struct ctf_metadata_decoder; | |
23 | ||
1e649dff | 24 | /* CTF metadata decoder status */ |
4164020e SM |
25 | enum ctf_metadata_decoder_status |
26 | { | |
27 | CTF_METADATA_DECODER_STATUS_OK = 0, | |
28 | CTF_METADATA_DECODER_STATUS_NONE = 1, | |
29 | CTF_METADATA_DECODER_STATUS_ERROR = -1, | |
30 | CTF_METADATA_DECODER_STATUS_INCOMPLETE = -2, | |
31 | CTF_METADATA_DECODER_STATUS_INVAL_VERSION = -3, | |
32 | CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR = -4, | |
1e649dff PP |
33 | }; |
34 | ||
0f5c5d5c SM |
35 | inline const char *format_as(ctf_metadata_decoder_status status) noexcept |
36 | { | |
37 | switch (status) { | |
38 | case CTF_METADATA_DECODER_STATUS_OK: | |
39 | return "CTF_METADATA_DECODER_STATUS_OK"; | |
40 | ||
41 | case CTF_METADATA_DECODER_STATUS_NONE: | |
42 | return "CTF_METADATA_DECODER_STATUS_NONE"; | |
43 | ||
44 | case CTF_METADATA_DECODER_STATUS_ERROR: | |
45 | return "CTF_METADATA_DECODER_STATUS_ERROR"; | |
46 | ||
47 | case CTF_METADATA_DECODER_STATUS_INCOMPLETE: | |
48 | return "CTF_METADATA_DECODER_STATUS_INCOMPLETE"; | |
49 | ||
50 | case CTF_METADATA_DECODER_STATUS_INVAL_VERSION: | |
51 | return "CTF_METADATA_DECODER_STATUS_INVAL_VERSION"; | |
52 | ||
53 | case CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR: | |
54 | return "CTF_METADATA_DECODER_STATUS_IR_VISITOR_ERROR"; | |
55 | } | |
56 | ||
57 | bt_common_abort(); | |
58 | } | |
59 | ||
a2a54545 | 60 | /* Decoding configuration */ |
4164020e SM |
61 | struct ctf_metadata_decoder_config |
62 | { | |
0f5c5d5c SM |
63 | explicit ctf_metadata_decoder_config(const bt2c::Logger& parentLogger) : |
64 | logger {parentLogger, "PLUGIN/CTF/META/DECODER-CONFIG"} | |
65 | { | |
66 | } | |
4164020e | 67 | |
0f5c5d5c SM |
68 | bt2c::Logger logger; |
69 | ||
70 | /* Weak, used to create a bt_trace_class, if not nullptr. */ | |
afb0f12b | 71 | bt_self_component *self_comp = nullptr; |
4164020e | 72 | |
c942e7a2 | 73 | ctf::src::ClkClsCfg clkClsCfg; |
4164020e SM |
74 | |
75 | /* True to create trace class objects */ | |
afb0f12b | 76 | bool create_trace_class = false; |
4164020e SM |
77 | |
78 | /* | |
79 | * True to keep the plain text when content is appended with | |
80 | * ctf_metadata_decoder_append_content(). | |
81 | */ | |
afb0f12b | 82 | bool keep_plain_text = false; |
a2a54545 PP |
83 | }; |
84 | ||
1fa280c9 SM |
85 | struct ctf_metadata_decoder_deleter |
86 | { | |
87 | void operator()(struct ctf_metadata_decoder *decoder); | |
88 | }; | |
89 | ||
90 | using ctf_metadata_decoder_up = std::unique_ptr<ctf_metadata_decoder, ctf_metadata_decoder_deleter>; | |
91 | ||
1e649dff | 92 | /* |
862ca4ed | 93 | * Creates a CTF metadata decoder. |
1e649dff PP |
94 | * |
95 | * Returns `NULL` on error. | |
96 | */ | |
1fa280c9 | 97 | ctf_metadata_decoder_up |
4164020e | 98 | ctf_metadata_decoder_create(const struct ctf_metadata_decoder_config *config); |
1e649dff PP |
99 | |
100 | /* | |
101 | * Destroys a CTF metadata decoder that you created with | |
102 | * ctf_metadata_decoder_create(). | |
103 | */ | |
4164020e | 104 | void ctf_metadata_decoder_destroy(struct ctf_metadata_decoder *metadata_decoder); |
1e649dff PP |
105 | |
106 | /* | |
06be9946 | 107 | * Appends content to the metadata decoder. |
1e649dff PP |
108 | * |
109 | * This function reads the metadata from the current position of `fp` | |
06be9946 | 110 | * until the end of this file stream. |
1e649dff PP |
111 | * |
112 | * The metadata can be packetized or not. | |
113 | * | |
06be9946 PP |
114 | * The metadata chunk needs to be complete and lexically scannable, that |
115 | * is, zero or more complete top-level blocks. If it's incomplete, this | |
1e649dff PP |
116 | * function returns `CTF_METADATA_DECODER_STATUS_INCOMPLETE`. If this |
117 | * function returns `CTF_METADATA_DECODER_STATUS_INCOMPLETE`, then you | |
06be9946 | 118 | * need to call it again with the _same_ metadata and more to make it |
1e649dff PP |
119 | * complete. For example: |
120 | * | |
121 | * First call: event { name = hell | |
122 | * Second call: event { name = hello_world; ... }; | |
123 | * | |
1e649dff PP |
124 | * If everything goes as expected, this function returns |
125 | * `CTF_METADATA_DECODER_STATUS_OK`. | |
126 | */ | |
4164020e SM |
127 | enum ctf_metadata_decoder_status |
128 | ctf_metadata_decoder_append_content(struct ctf_metadata_decoder *metadata_decoder, FILE *fp); | |
1e649dff | 129 | |
06be9946 PP |
130 | /* |
131 | * Returns the trace IR trace class of this metadata decoder (new | |
132 | * reference). | |
133 | * | |
134 | * Returns `NULL` if there's none yet or if the metadata decoder is not | |
135 | * configured to create trace classes. | |
136 | */ | |
70923576 | 137 | bt2::TraceClass::Shared ctf_metadata_decoder_get_ir_trace_class(struct ctf_metadata_decoder *mdec); |
44c440bc | 138 | |
06be9946 PP |
139 | /* |
140 | * Returns the CTF IR trace class of this metadata decoder. | |
141 | * | |
142 | * Returns `NULL` if there's none yet or if the metadata decoder is not | |
143 | * configured to create trace classes. | |
144 | */ | |
4164020e SM |
145 | struct ctf_trace_class * |
146 | ctf_metadata_decoder_borrow_ctf_trace_class(struct ctf_metadata_decoder *mdec); | |
1e649dff PP |
147 | |
148 | /* | |
06be9946 PP |
149 | * Checks whether or not a given metadata file stream `fp` is |
150 | * packetized, setting `is_packetized` accordingly on success. On | |
151 | * success, also sets `*byte_order` to the byte order of the first | |
152 | * packet. | |
1e649dff | 153 | */ |
4164020e | 154 | int ctf_metadata_decoder_is_packetized(FILE *fp, bool *is_packetized, int *byte_order, |
0f5c5d5c | 155 | const bt2c::Logger& logger); |
1e649dff PP |
156 | |
157 | /* | |
06be9946 PP |
158 | * Returns the byte order of the decoder's metadata stream as set by the |
159 | * last call to ctf_metadata_decoder_append_content(). | |
160 | * | |
161 | * Returns -1 if unknown (plain text content). | |
1e649dff | 162 | */ |
06be9946 PP |
163 | int ctf_metadata_decoder_get_byte_order(struct ctf_metadata_decoder *mdec); |
164 | ||
165 | /* | |
166 | * Returns the UUID of the decoder's metadata stream as set by the last | |
167 | * call to ctf_metadata_decoder_append_content(). | |
1a6da3f9 | 168 | */ |
4164020e | 169 | int ctf_metadata_decoder_get_uuid(struct ctf_metadata_decoder *mdec, bt_uuid_t uuid); |
1a6da3f9 PP |
170 | |
171 | /* | |
172 | * Returns the UUID of the decoder's trace class, if available. | |
06be9946 | 173 | * |
1a6da3f9 PP |
174 | * Returns: |
175 | * | |
176 | * * `CTF_METADATA_DECODER_STATUS_OK`: success. | |
177 | * * `CTF_METADATA_DECODER_STATUS_NONE`: no UUID. | |
178 | * * `CTF_METADATA_DECODER_STATUS_INCOMPLETE`: missing metadata content. | |
06be9946 | 179 | */ |
4164020e SM |
180 | enum ctf_metadata_decoder_status |
181 | ctf_metadata_decoder_get_trace_class_uuid(struct ctf_metadata_decoder *mdec, bt_uuid_t uuid); | |
06be9946 PP |
182 | |
183 | /* | |
184 | * Returns the metadata decoder's current metadata text. | |
185 | */ | |
06be9946 | 186 | const char *ctf_metadata_decoder_get_text(struct ctf_metadata_decoder *mdec); |
1e649dff | 187 | |
4164020e SM |
188 | static inline bool ctf_metadata_decoder_is_packet_version_valid(unsigned int major, |
189 | unsigned int minor) | |
3c8252a5 | 190 | { |
4164020e | 191 | return major == 1 && minor == 8; |
3c8252a5 PP |
192 | } |
193 | ||
1e649dff | 194 | #endif /* _METADATA_DECODER_H */ |