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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
********************************************************************************
* Copyright (C) 2013-2014, International Business Machines Corporation and others.
* All Rights Reserved.
********************************************************************************
*
* File UFORMATTABLE.H
*
* Modification History:
*
* Date Name Description
* 2013 Jun 7 srl New
********************************************************************************
*/
/**
* \file
* \brief C API: UFormattable is a thin wrapper for primitive types used for formatting and parsing.
*
* This is a C interface to the icu::Formattable class. Static functions on this class convert
* to and from this interface (via reinterpret_cast). Note that Formattables (and thus UFormattables)
* are mutable, and many operations (even getters) may actually modify the internal state. For this
* reason, UFormattables are not thread safe, and should not be shared between threads.
*
* See {@link unum_parseToUFormattable} for example code.
*/
#ifndef UFORMATTABLE_H
#define UFORMATTABLE_H
#include "unicode/utypes.h"
#if !UCONFIG_NO_FORMATTING
#include "unicode/localpointer.h"
/**
* Enum designating the type of a UFormattable instance.
* Practically, this indicates which of the getters would return without conversion
* or error.
* @see icu::Formattable::Type
* @stable ICU 52
*/
typedef enum UFormattableType {
UFMT_DATE = 0, /**< ufmt_getDate() will return without conversion. @see ufmt_getDate*/
UFMT_DOUBLE, /**< ufmt_getDouble() will return without conversion. @see ufmt_getDouble*/
UFMT_LONG, /**< ufmt_getLong() will return without conversion. @see ufmt_getLong */
UFMT_STRING, /**< ufmt_getUChars() will return without conversion. @see ufmt_getUChars*/
UFMT_ARRAY, /**< ufmt_countArray() and ufmt_getArray() will return the value. @see ufmt_getArrayItemByIndex */
UFMT_INT64, /**< ufmt_getInt64() will return without conversion. @see ufmt_getInt64 */
UFMT_OBJECT, /**< ufmt_getObject() will return without conversion. @see ufmt_getObject*/
#ifndef U_HIDE_DEPRECATED_API
/**
* One more than the highest normal UFormattableType value.
* @deprecated ICU 58 The numeric value may change over time, see ICU ticket #12420.
*/
UFMT_COUNT
#endif /* U_HIDE_DEPRECATED_API */
} UFormattableType;
/**
* Opaque type representing various types of data which may be used for formatting
* and parsing operations.
* @see icu::Formattable
* @stable ICU 52
*/
typedef void *UFormattable;
/**
* Initialize a UFormattable, to type UNUM_LONG, value 0
* may return error if memory allocation failed.
* parameter status error code.
* See {@link unum_parseToUFormattable} for example code.
* @stable ICU 52
* @return the new UFormattable
* @see ufmt_close
* @see icu::Formattable::Formattable()
*/
U_STABLE UFormattable* U_EXPORT2
ufmt_open(UErrorCode* status);
/**
* Cleanup any additional memory allocated by this UFormattable.
* @param fmt the formatter
* @stable ICU 52
* @see ufmt_open
*/
U_STABLE void U_EXPORT2
ufmt_close(UFormattable* fmt);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUFormattablePointer
* "Smart pointer" class, closes a UFormattable via ufmt_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 52
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattablePointer, UFormattable, ufmt_close);
U_NAMESPACE_END
#endif
/**
* Return the type of this object
* @param fmt the UFormattable object
* @param status status code - U_ILLEGAL_ARGUMENT_ERROR is returned if the UFormattable contains data not supported by
* the API
* @return the value as a UFormattableType
* @see ufmt_isNumeric
* @see icu::Formattable::getType() const
* @stable ICU 52
*/
U_STABLE UFormattableType U_EXPORT2
ufmt_getType(const UFormattable* fmt, UErrorCode *status);
/**
* Return whether the object is numeric.
* @param fmt the UFormattable object
* @return true if the object is a double, long, or int64 value, else false.
* @see ufmt_getType
* @see icu::Formattable::isNumeric() const
* @stable ICU 52
*/
U_STABLE UBool U_EXPORT2
ufmt_isNumeric(const UFormattable* fmt);
/**
* Gets the UDate value of this object. If the type is not of type UFMT_DATE,
* status is set to U_INVALID_FORMAT_ERROR and the return value is
* undefined.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @return the value
* @stable ICU 52
* @see icu::Formattable::getDate(UErrorCode&) const
*/
U_STABLE UDate U_EXPORT2
ufmt_getDate(const UFormattable* fmt, UErrorCode *status);
/**
* Gets the double value of this object. If the type is not a UFMT_DOUBLE, or
* if there are additional significant digits than fit in a double type,
* a conversion is performed with possible loss of precision.
* If the type is UFMT_OBJECT and the
* object is a Measure, then the result of
* getNumber().getDouble(status) is returned. If this object is
* neither a numeric type nor a Measure, then 0 is returned and
* the status is set to U_INVALID_FORMAT_ERROR.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @return the value
* @stable ICU 52
* @see icu::Formattable::getDouble(UErrorCode&) const
*/
U_STABLE double U_EXPORT2
ufmt_getDouble(UFormattable* fmt, UErrorCode *status);
/**
* Gets the long (int32_t) value of this object. If the magnitude is too
* large to fit in a long, then the maximum or minimum long value,
* as appropriate, is returned and the status is set to
* U_INVALID_FORMAT_ERROR. If this object is of type UFMT_INT64 and
* it fits within a long, then no precision is lost. If it is of
* type kDouble or kDecimalNumber, then a conversion is peformed, with
* truncation of any fractional part. If the type is UFMT_OBJECT and
* the object is a Measure, then the result of
* getNumber().getLong(status) is returned. If this object is
* neither a numeric type nor a Measure, then 0 is returned and
* the status is set to U_INVALID_FORMAT_ERROR.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @return the value
* @stable ICU 52
* @see icu::Formattable::getLong(UErrorCode&) const
*/
U_STABLE int32_t U_EXPORT2
ufmt_getLong(UFormattable* fmt, UErrorCode *status);
/**
* Gets the int64_t value of this object. If this object is of a numeric
* type and the magnitude is too large to fit in an int64, then
* the maximum or minimum int64 value, as appropriate, is returned
* and the status is set to U_INVALID_FORMAT_ERROR. If the
* magnitude fits in an int64, then a casting conversion is
* peformed, with truncation of any fractional part. If the type
* is UFMT_OBJECT and the object is a Measure, then the result of
* getNumber().getDouble(status) is returned. If this object is
* neither a numeric type nor a Measure, then 0 is returned and
* the status is set to U_INVALID_FORMAT_ERROR.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @return the value
* @stable ICU 52
* @see icu::Formattable::getInt64(UErrorCode&) const
*/
U_STABLE int64_t U_EXPORT2
ufmt_getInt64(UFormattable* fmt, UErrorCode *status);
/**
* Returns a pointer to the UObject contained within this
* formattable (as a const void*), or NULL if this object
* is not of type UFMT_OBJECT.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @return the value as a const void*. It is a polymorphic C++ object.
* @stable ICU 52
* @see icu::Formattable::getObject() const
*/
U_STABLE const void *U_EXPORT2
ufmt_getObject(const UFormattable* fmt, UErrorCode *status);
/**
* Gets the string value of this object as a UChar string. If the type is not a
* string, status is set to U_INVALID_FORMAT_ERROR and a NULL pointer is returned.
* This function is not thread safe and may modify the UFormattable if need be to terminate the string.
* The returned pointer is not valid if any other functions are called on this UFormattable, or if the UFormattable is closed.
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors
* @param len if non null, contains the string length on return
* @return the null terminated string value - must not be referenced after any other functions are called on this UFormattable.
* @stable ICU 52
* @see icu::Formattable::getString(UnicodeString&)const
*/
U_STABLE const UChar* U_EXPORT2
ufmt_getUChars(UFormattable* fmt, int32_t *len, UErrorCode *status);
/**
* Get the number of array objects contained, if an array type UFMT_ARRAY
* @param fmt the UFormattable object
* @param status the error code - any conversion or format errors. U_ILLEGAL_ARGUMENT_ERROR if not an array type.
* @return the number of array objects or undefined if not an array type
* @stable ICU 52
* @see ufmt_getArrayItemByIndex
*/
U_STABLE int32_t U_EXPORT2
ufmt_getArrayLength(const UFormattable* fmt, UErrorCode *status);
/**
* Get the specified value from the array of UFormattables. Invalid if the object is not an array type UFMT_ARRAY
* @param fmt the UFormattable object
* @param n the number of the array to return (0 based).
* @param status the error code - any conversion or format errors. Returns an error if n is out of bounds.
* @return the nth array value, only valid while the containing UFormattable is valid. NULL if not an array.
* @stable ICU 52
* @see icu::Formattable::getArray(int32_t&, UErrorCode&) const
*/
U_STABLE UFormattable * U_EXPORT2
ufmt_getArrayItemByIndex(UFormattable* fmt, int32_t n, UErrorCode *status);
/**
* Returns a numeric string representation of the number contained within this
* formattable, or NULL if this object does not contain numeric type.
* For values obtained by parsing, the returned decimal number retains
* the full precision and range of the original input, unconstrained by
* the limits of a double floating point or a 64 bit int.
*
* This function is not thread safe, and therfore is not declared const,
* even though it is logically const.
* The resulting buffer is owned by the UFormattable and is invalid if any other functions are
* called on the UFormattable.
*
* Possible errors include U_MEMORY_ALLOCATION_ERROR, and
* U_INVALID_STATE if the formattable object has not been set to
* a numeric type.
* @param fmt the UFormattable object
* @param len if non-null, on exit contains the string length (not including the terminating null)
* @param status the error code
* @return the character buffer as a NULL terminated string, which is owned by the object and must not be accessed if any other functions are called on this object.
* @stable ICU 52
* @see icu::Formattable::getDecimalNumber(UErrorCode&)
*/
U_STABLE const char * U_EXPORT2
ufmt_getDecNumChars(UFormattable *fmt, int32_t *len, UErrorCode *status);
#endif
#endif
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