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/* Copyright (c) 2010 The Chromium Authors. All rights reserved.
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef PPAPI_C_PP_VAR_H_
#define PPAPI_C_PP_VAR_H_
/**
* @file
* Defines the API ...
*/
#include "ppapi/c/pp_bool.h"
#include "ppapi/c/pp_macros.h"
#include "ppapi/c/pp_stdint.h"
/**
*
* @addtogroup Enums
* @{
*/
typedef enum {
PP_VARTYPE_UNDEFINED,
PP_VARTYPE_NULL,
PP_VARTYPE_BOOL,
PP_VARTYPE_INT32,
PP_VARTYPE_DOUBLE,
PP_VARTYPE_STRING,
PP_VARTYPE_OBJECT
} PP_VarType;
PP_COMPILE_ASSERT_SIZE_IN_BYTES(PP_VarType, 4);
/**
* @}
*/
/**
* @addtogroup Structs
* @{
*/
/**
* Do not rely on having a predictable and reproducible
* int/double differentiation.
* JavaScript has a "number" type for holding a number, and
* does not differentiate between floating point and integer numbers. The
* JavaScript library will try to optimize operations by using integers
* when possible, but could end up with doubles depending on how the number
* was arrived at.
*
* Your best bet is to have a wrapper for variables
* that always gets out the type you expect, converting as necessary.
*
*/
struct PP_Var {
PP_VarType type;
/** Ensures @a value is aligned on an 8-byte boundary relative to the
* start of the struct. Some compilers align doubles on 8-byte boundaries
* for 32-bit x86, and some align on 4-byte boundaries.
*/
int32_t padding;
union {
PP_Bool as_bool;
int32_t as_int;
double as_double;
/**
* Internal ID for strings and objects. The identifier is an opaque handle
* assigned by the browser to the plugin. It is guaranteed never to be 0,
* so a plugin can initialize this ID to 0 to indicate a "NULL handle."
*/
int64_t as_id;
} value;
};
PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(PP_Var, 16);
/**
* @}
*/
/**
* @addtogroup Functions
* @{
*/
PP_INLINE struct PP_Var PP_MakeUndefined() {
struct PP_Var result = { PP_VARTYPE_UNDEFINED, 0, {PP_FALSE} };
return result;
}
PP_INLINE struct PP_Var PP_MakeNull() {
struct PP_Var result = { PP_VARTYPE_NULL, 0, {PP_FALSE} };
return result;
}
PP_INLINE struct PP_Var PP_MakeBool(PP_Bool value) {
struct PP_Var result = { PP_VARTYPE_BOOL, 0, {PP_FALSE} };
result.value.as_bool = value;
return result;
}
PP_INLINE struct PP_Var PP_MakeInt32(int32_t value) {
struct PP_Var result = { PP_VARTYPE_INT32, 0, {PP_FALSE} };
result.value.as_int = value;
return result;
}
PP_INLINE struct PP_Var PP_MakeDouble(double value) {
struct PP_Var result = { PP_VARTYPE_DOUBLE, 0, {PP_FALSE} };
result.value.as_double = value;
return result;
}
/**
* @}
*/
#endif /* PPAPI_C_PP_VAR_H_ */
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