Use O_RDWR for open write mode (for mmap)

[babeltrace.git] / formats / ctf-text / ctf-text.c

/*
 * BabelTrace - Common Trace Format (CTF)
 *
 * CTF Text Format registration.
 *
 * Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

#include <babeltrace/format.h>
#include <babeltrace/ctf-text/types.h>
#include <babeltrace/babeltrace.h>
#include <inttypes.h>
#include <uuid/uuid.h>
#include <sys/mman.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <dirent.h>
#include <glib.h>
#include <unistd.h>
#include <stdlib.h>

struct trace_descriptor *ctf_text_open_trace(const char *path, int flags);
void ctf_text_close_trace(struct trace_descriptor *descriptor);

static
rw_dispatch write_dispatch_table[] = {
	[ CTF_TYPE_INTEGER ] = ctf_text_integer_write,
	[ CTF_TYPE_FLOAT ] = ctf_text_float_write,
	[ CTF_TYPE_ENUM ] = ctf_text_enum_write,
	[ CTF_TYPE_STRING ] = ctf_text_string_write,
	[ CTF_TYPE_STRUCT ] = ctf_text_struct_write,
	[ CTF_TYPE_VARIANT ] = ctf_text_variant_write,
	[ CTF_TYPE_ARRAY ] = ctf_text_array_write,
	[ CTF_TYPE_SEQUENCE ] = ctf_text_sequence_write,
};

static
struct format ctf_text_format = {
	.open_trace = ctf_text_open_trace,
	.close_trace = ctf_text_close_trace,
};

struct trace_descriptor *ctf_text_open_trace(const char *path, int flags)
{
	struct ctf_text_stream_pos *pos;
	FILE *fp;

	pos = g_new0(struct ctf_text_stream_pos, 1);

	switch (flags & O_ACCMODE) {
	case O_RDWR:
		if (!path)
			fp = stdout;
		else
			fp = fopen(path, "w");
		if (!fp)
			goto error;
		pos->fp = fp;
		pos->parent.rw_table = write_dispatch_table;
		break;
	case O_RDONLY:
	default:
		fprintf(stdout, "[error] Incorrect open flags.\n");
		goto error;
	}

	return &pos->trace_descriptor;
error:
	g_free(pos);
	return NULL;
}

void ctf_text_close_trace(struct trace_descriptor *td)
{
	struct ctf_text_stream_pos *pos =
		container_of(td, struct ctf_text_stream_pos, trace_descriptor);
	fclose(pos->fp);
	g_free(pos);
}

void __attribute__((constructor)) ctf_text_init(void)
{
	int ret;

	ctf_text_format.name = g_quark_from_static_string("text");
	ret = bt_register_format(&ctf_text_format);
	assert(!ret);
}

/* TODO: finalize */