[babeltrace.git] / types / float.c

/*
 * float.c
 *
 * BabelTrace - Float Type Converter
 *
 * 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/compiler.h>
#include <babeltrace/format.h>

static
struct definition *_float_definition_new(struct type *type,
				   struct definition_scope *parent_scope);
static
void _float_definition_free(struct definition *definition);

void float_copy(struct stream_pos *destp,
		const struct format *fdest,
		struct stream_pos *srcp,
		const struct format *fsrc,
		struct definition *definition)
{
	struct definition_float *_float =
		container_of(definition, struct definition_float, p);
	struct type_float *float_type = _float->type;

	if (fsrc->float_copy == fdest->float_copy) {
		fsrc->float_copy(destp, srcp, float_type);
	} else {
		double v;

		v = fsrc->double_read(srcp, float_type);
		fdest->double_write(destp, float_type, v);
	}
}

static
void _float_type_free(struct type *type)
{
	struct type_float *float_type =
		container_of(type, struct type_float, p);

	type_unref(&float_type->exp->p);
	type_unref(&float_type->mantissa->p);
	type_unref(&float_type->sign->p);
	g_free(float_type);
}

struct type_float *
	float_type_new(const char *name, size_t mantissa_len,
		       size_t exp_len, int byte_order, size_t alignment)
{
	struct type_float *float_type;
	struct type *type;

	float_type = g_new(struct type_float, 1);
	type = &float_type->p;
	type->id = CTF_TYPE_FLOAT;
	type->name = g_quark_from_string(name);
	type->alignment = alignment;
	type->copy = float_copy;
	type->type_free = _float_type_free;
	type->definition_new = _float_definition_new;
	type->definition_free = _float_definition_free;
	type->ref = 1;
	float_type->byte_order = byte_order;

	float_type->sign = integer_type_new(NULL, 1,
					    byte_order, false, 1);
	float_type->mantissa = integer_type_new(NULL, mantissa_len - 1,
						byte_order, false, 1);
	float_type->exp = integer_type_new(NULL, exp_len,
					   byte_order, true, 1);
	return float_type;
}

static
struct definition *
	_float_definition_new(struct type *type,
			      struct definition_scope *parent_scope)
{
	struct type_float *float_type =
		container_of(type, struct type_float, p);
	struct definition_float *_float;

	_float = g_new(struct definition_float, 1);
	type_ref(&float_type->p);
	_float->p.type= type;
	_float->type= float_type;
	_float->p.ref = 1;
	_float->value = 0.0;
	return &_float->p;
}

static
void _float_definition_free(struct definition *definition)
{
	struct definition_float *_float =
		container_of(definition, struct definition_float, p);

	type_unref(_float->p.type);
	g_free(_float);
}
Commit	Line	Data
	1	/*
	2	* float.c
	3	*
	4	* BabelTrace - Float Type Converter
	5	*
	6	* Copyright 2010, 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	7	*
	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:
	14	*
	15	* The above copyright notice and this permission notice shall be included in
	16	* all copies or substantial portions of the Software.
	17	*/
	18
	19	#include <babeltrace/compiler.h>
	20	#include <babeltrace/format.h>
	21
	22	static
	23	struct definition _float_definition_new(struct type type,
	24	struct definition_scope *parent_scope);
	25	static
	26	void _float_definition_free(struct definition *definition);
	27
	28	void float_copy(struct stream_pos *destp,
	29	const struct format *fdest,
	30	struct stream_pos *srcp,
	31	const struct format *fsrc,
	32	struct definition *definition)
	33	{
	34	struct definition_float *_float =
	35	container_of(definition, struct definition_float, p);
	36	struct type_float *float_type = _float->type;
	37
	38	if (fsrc->float_copy == fdest->float_copy) {
	39	fsrc->float_copy(destp, srcp, float_type);
	40	} else {
	41	double v;
	42
	43	v = fsrc->double_read(srcp, float_type);
	44	fdest->double_write(destp, float_type, v);
	45	}
	46	}
	47
	48	static
	49	void _float_type_free(struct type *type)
	50	{
	51	struct type_float *float_type =
	52	container_of(type, struct type_float, p);
	53
	54	type_unref(&float_type->exp->p);
	55	type_unref(&float_type->mantissa->p);
	56	type_unref(&float_type->sign->p);
	57	g_free(float_type);
	58	}
	59
	60	struct type_float *
	61	float_type_new(const char *name, size_t mantissa_len,
	62	size_t exp_len, int byte_order, size_t alignment)
	63	{
	64	struct type_float *float_type;
	65	struct type *type;
	66
	67	float_type = g_new(struct type_float, 1);
	68	type = &float_type->p;
	69	type->id = CTF_TYPE_FLOAT;
	70	type->name = g_quark_from_string(name);
	71	type->alignment = alignment;
	72	type->copy = float_copy;
	73	type->type_free = _float_type_free;
	74	type->definition_new = _float_definition_new;
	75	type->definition_free = _float_definition_free;
	76	type->ref = 1;
	77	float_type->byte_order = byte_order;
	78
	79	float_type->sign = integer_type_new(NULL, 1,
	80	byte_order, false, 1);
	81	float_type->mantissa = integer_type_new(NULL, mantissa_len - 1,
	82	byte_order, false, 1);
	83	float_type->exp = integer_type_new(NULL, exp_len,
	84	byte_order, true, 1);
	85	return float_type;
	86	}
	87
	88	static
	89	struct definition *
	90	_float_definition_new(struct type *type,
	91	struct definition_scope *parent_scope)
	92	{
	93	struct type_float *float_type =
	94	container_of(type, struct type_float, p);
	95	struct definition_float *_float;
	96
	97	_float = g_new(struct definition_float, 1);
	98	type_ref(&float_type->p);
	99	_float->p.type= type;
	100	_float->type= float_type;
	101	_float->p.ref = 1;
	102	_float->value = 0.0;
	103	return &_float->p;
	104	}
	105
	106	static
	107	void _float_definition_free(struct definition *definition)
	108	{
	109	struct definition_float *_float =
	110	container_of(definition, struct definition_float, p);
	111
	112	type_unref(_float->p.type);
	113	g_free(_float);
	114	}