obs-studio/libobs/util/serializer.h

/*
 * Copyright (c) 2013 Hugh Bailey <obs.jim@gmail.com>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

#pragma once

/*
 *   General programmable serialization functions.  (A shared interface to
 * various reading/writing to/from different inputs/outputs)
 *
 * TODO: Not currently implemented
 */

#ifdef __cplusplus
extern "C" {
#endif

enum serialize_seek_type {
	SERIALIZE_SEEK_START,
	SERIALIZE_SEEK_CURRENT,
	SERIALIZE_SEEK_END
};

struct serializer {
	void *param;
	size_t (*serialize)(struct serializer, void *, size_t);
	uint64_t (*seek)(struct serializer, int64_t, enum serialize_seek_type);
	uint64_t (*getpos)(struct serializer);
};

static inline size_t serialize(struct serializer *s, void *data, size_t len)
{
	if (s->serialize)
		return s->serialize(s, data, len);

	return 0;
}

static inline uint64_t serializer_seek(struct serializer *s, int64_t offset,
		enum serialize_seek_type seek_type)
{
	if (s->seek)
		return s->seek(s, offset, seek_type);
	return 0;
}

static inline uint64_t serializer_getpos(struct serializer *s)
{
	if (s->getpos)
		return s->getpos(s);
	return 0;
}

static inline void serializer_write_u8(struct serializer *s, uint8_t u8)
{
	serialize(s, &u8, sizeof(uint8_t));
}

static inline void serializer_write_i8(struct serializer *s, int8_t i8)
{
	serialize(s, &i8, sizeof(int8_t));
}

static inline void serializer_write_u16(struct serializer *s, uint16_t u16)
{
	serialize(s, &u16, sizeof(uint16_t));
}

static inline void serializer_write_i16(struct serializer *s, int16_t i16)
{
	serialize(s, &i16, sizeof(int16_t));
}

static inline void serializer_write_u32(struct serializer *s, uint32_t u32)
{
	serialize(s, &u32, sizeof(uint32_t));
}

static inline void serializer_write_i32(struct serializer *s, int32_t i32)
{
	serialize(s, &i32, sizeof(int32_t));
}

static inline void serializer_write_u64(struct serializer *s, uint32_t u64)
{
	serialize(s, &u64, sizeof(uint64_t));
}

static inline void serializer_write_i64(struct serializer *s, int32_t i64)
{
	serialize(s, &i64, sizeof(int64_t));
}

static inline void serializer_write_float(struct serializer *s, float f)
{
	serialize(s, &f, sizeof(float));
}

static inline void serializer_write_double(struct serializer *s, double d)
{
	serialize(s, &d, sizeof(double));
}

#ifdef __cplusplus
}
#endif