Trivial cleanup
[babeltrace.git] / formats / ctf / ctf.c
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1/*
2 * BabelTrace - Common Trace Format (CTF)
3 *
4 * Format registration.
5 *
c054553d 6 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
fc93b2bd 7 *
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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:
fc93b2bd 14 *
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15 * The above copyright notice and this permission notice shall be included in
16 * all copies or substantial portions of the Software.
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17 */
18
19#include <babeltrace/format.h>
20#include <babeltrace/ctf/types.h>
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21#include <babeltrace/ctf/metadata.h>
22#include <errno.h>
23#include <sys/stat.h>
24#include <sys/types.h>
25#include <dirent.h>
26#include <fcntl.h>
27#include <glib.h>
28
29struct trace_descriptor {
30 struct ctf_trace ctf_trace;
31};
32
33struct trace_descriptor *ctf_open_trace(const char *path, int flags);
34void ctf_close_trace(struct trace_descriptor *descriptor);
fc93b2bd 35
4c8bfb7e 36static struct format ctf_format = {
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37 .uint_read = ctf_uint_read,
38 .int_read = ctf_int_read,
39 .uint_write = ctf_uint_write,
40 .int_write = ctf_int_write,
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41 .double_read = ctf_double_read,
42 .double_write = ctf_double_write,
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43 .float_copy = ctf_float_copy,
44 .string_copy = ctf_string_copy,
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45 .string_read = ctf_string_read,
46 .string_write = ctf_string_write,
47 .string_free_temp = ctf_string_free_temp,
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48 .enum_read = ctf_enum_read,
49 .enum_write = ctf_enum_write,
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50 .struct_begin = ctf_struct_begin,
51 .struct_end = ctf_struct_end,
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52 .variant_begin = ctf_variant_begin,
53 .variant_end = ctf_variant_end,
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54 .array_begin = ctf_array_begin,
55 .array_end = ctf_array_end,
56 .sequence_begin = ctf_sequence_begin,
57 .sequence_end = ctf_sequence_end,
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58 .open_trace = ctf_open_trace,
59 .close_trace = ctf_close_trace,
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60};
61
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62static
63int ctf_open_trace_read(struct trace_descriptor *td, const char *path, int flags)
64{
65 int ret;
66
67 td->ctf_trace.flags = flags;
68
69 /* Open trace directory */
70 td->ctf_trace.dir = opendir(path);
71 if (!td->ctf_trace.dir) {
72 fprintf(stdout, "Unable to open trace directory.\n");
73 ret = -ENOENT;
74 goto error;
75 }
76
77
78
79 /*
80 * Open each stream: for each file, try to open, check magic
81 * number, and get the stream ID to add to the right location in
82 * the stream array.
83 *
84 * Keep the metadata file separate.
85 */
86
87
88
89 /*
90 * Use the metadata file to populate the trace metadata.
91 */
92
93
94 return 0;
95error:
96 return ret;
97}
98
99static
100int ctf_open_trace_write(struct trace_descriptor *td, const char *path, int flags)
101{
102 int ret;
103
104 ret = mkdir(path, S_IRWXU|S_IRWXG);
105 if (ret)
106 return ret;
107
108 return 0;
109}
110
111struct trace_descriptor *ctf_open_trace(const char *path, int flags)
112{
113 struct trace_descriptor *td;
114 int ret;
115
116 td = g_new(struct trace_descriptor, 1);
117
118 switch (flags) {
119 case O_RDONLY:
120 ret = ctf_open_trace_read(td, path, flags);
121 if (ret)
122 goto error;
123 break;
124 case O_WRONLY:
125 ret = ctf_open_trace_write(td, path, flags);
126 if (ret)
127 goto error;
128 break;
129 default:
130 fprintf(stdout, "Incorrect open flags.\n");
131 goto error;
132 }
133
134 return td;
135error:
136 g_free(td);
137 return NULL;
138}
139
140void ctf_close_trace(struct trace_descriptor *td)
141{
142 closedir(td->ctf_trace.dir);
143 g_free(td);
144}
145
7fb21036 146void __attribute__((constructor)) ctf_init(void)
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147{
148 int ret;
149
4c8bfb7e 150 ctf_format.name = g_quark_from_static_string("ctf");
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151 ret = bt_register_format(&ctf_format);
152 assert(!ret);
153}
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154
155/* TODO: finalize */
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