ICU 4.8.1.1  4.8.1.1
Typedefs | Enumerations | Functions
unum.h File Reference

C API: NumberFormat. More...

#include "unicode/utypes.h"
#include "unicode/localpointer.h"
#include "unicode/uloc.h"
#include "unicode/umisc.h"
#include "unicode/parseerr.h"

Go to the source code of this file.

Typedefs

typedef void * UNumberFormat
 A number formatter.
typedef enum UNumberFormatStyle UNumberFormatStyle
 The possible number format styles.
typedef enum
UNumberFormatRoundingMode 
UNumberFormatRoundingMode
 The possible number format rounding modes.
typedef enum
UNumberFormatPadPosition 
UNumberFormatPadPosition
 The possible number format pad positions.
typedef enum UCurrencySpacing UCurrencySpacing
typedef enum UNumberFormatAttribute UNumberFormatAttribute
 The possible UNumberFormat numeric attributes.
typedef enum
UNumberFormatTextAttribute 
UNumberFormatTextAttribute
 The possible UNumberFormat text attributes.
typedef enum UNumberFormatSymbol UNumberFormatSymbol
 Constants for specifying a number format symbol.

Enumerations

enum  UNumberFormatStyle {
  UNUM_PATTERN_DECIMAL = 0, UNUM_DECIMAL = 1, UNUM_CURRENCY, UNUM_PERCENT,
  UNUM_SCIENTIFIC, UNUM_SPELLOUT, UNUM_ORDINAL, UNUM_DURATION,
  UNUM_NUMBERING_SYSTEM, UNUM_PATTERN_RULEBASED, UNUM_CURRENCY_ISO, UNUM_CURRENCY_PLURAL,
  UNUM_FORMAT_STYLE_COUNT, UNUM_DEFAULT = UNUM_DECIMAL, UNUM_IGNORE = UNUM_PATTERN_DECIMAL
}
 The possible number format styles. More...
enum  UNumberFormatRoundingMode {
  UNUM_ROUND_CEILING, UNUM_ROUND_FLOOR, UNUM_ROUND_DOWN, UNUM_ROUND_UP,
  UNUM_FOUND_HALFEVEN, UNUM_ROUND_HALFDOWN, UNUM_ROUND_HALFUP, UNUM_ROUND_UNNECESSARY,
  UNUM_ROUND_HALFEVEN = UNUM_FOUND_HALFEVEN
}
 The possible number format rounding modes. More...
enum  UNumberFormatPadPosition { UNUM_PAD_BEFORE_PREFIX, UNUM_PAD_AFTER_PREFIX, UNUM_PAD_BEFORE_SUFFIX, UNUM_PAD_AFTER_SUFFIX }
 The possible number format pad positions. More...
enum  UCurrencySpacing { UNUM_CURRENCY_MATCH, UNUM_CURRENCY_SURROUNDING_MATCH, UNUM_CURRENCY_INSERT, UNUM_CURRENCY_SPACING_COUNT }
 Constants for specifying currency spacing. More...
enum  UNumberFormatAttribute {
  UNUM_PARSE_INT_ONLY, UNUM_GROUPING_USED, UNUM_DECIMAL_ALWAYS_SHOWN, UNUM_MAX_INTEGER_DIGITS,
  UNUM_MIN_INTEGER_DIGITS, UNUM_INTEGER_DIGITS, UNUM_MAX_FRACTION_DIGITS, UNUM_MIN_FRACTION_DIGITS,
  UNUM_FRACTION_DIGITS, UNUM_MULTIPLIER, UNUM_GROUPING_SIZE, UNUM_ROUNDING_MODE,
  UNUM_ROUNDING_INCREMENT, UNUM_FORMAT_WIDTH, UNUM_PADDING_POSITION, UNUM_SECONDARY_GROUPING_SIZE,
  UNUM_SIGNIFICANT_DIGITS_USED, UNUM_MIN_SIGNIFICANT_DIGITS, UNUM_MAX_SIGNIFICANT_DIGITS, UNUM_LENIENT_PARSE
}
 The possible UNumberFormat numeric attributes. More...
enum  UNumberFormatTextAttribute {
  UNUM_POSITIVE_PREFIX, UNUM_POSITIVE_SUFFIX, UNUM_NEGATIVE_PREFIX, UNUM_NEGATIVE_SUFFIX,
  UNUM_PADDING_CHARACTER, UNUM_CURRENCY_CODE, UNUM_DEFAULT_RULESET, UNUM_PUBLIC_RULESETS
}
 The possible UNumberFormat text attributes. More...
enum  UNumberFormatSymbol {
  UNUM_DECIMAL_SEPARATOR_SYMBOL = 0, UNUM_GROUPING_SEPARATOR_SYMBOL = 1, UNUM_PATTERN_SEPARATOR_SYMBOL = 2, UNUM_PERCENT_SYMBOL = 3,
  UNUM_ZERO_DIGIT_SYMBOL = 4, UNUM_DIGIT_SYMBOL = 5, UNUM_MINUS_SIGN_SYMBOL = 6, UNUM_PLUS_SIGN_SYMBOL = 7,
  UNUM_CURRENCY_SYMBOL = 8, UNUM_INTL_CURRENCY_SYMBOL = 9, UNUM_MONETARY_SEPARATOR_SYMBOL = 10, UNUM_EXPONENTIAL_SYMBOL = 11,
  UNUM_PERMILL_SYMBOL = 12, UNUM_PAD_ESCAPE_SYMBOL = 13, UNUM_INFINITY_SYMBOL = 14, UNUM_NAN_SYMBOL = 15,
  UNUM_SIGNIFICANT_DIGIT_SYMBOL = 16, UNUM_MONETARY_GROUPING_SEPARATOR_SYMBOL = 17, UNUM_ONE_DIGIT_SYMBOL = 18, UNUM_TWO_DIGIT_SYMBOL = 19,
  UNUM_THREE_DIGIT_SYMBOL = 20, UNUM_FOUR_DIGIT_SYMBOL = 21, UNUM_FIVE_DIGIT_SYMBOL = 22, UNUM_SIX_DIGIT_SYMBOL = 23,
  UNUM_SEVEN_DIGIT_SYMBOL = 24, UNUM_EIGHT_DIGIT_SYMBOL = 25, UNUM_NINE_DIGIT_SYMBOL = 26, UNUM_FORMAT_SYMBOL_COUNT = 27
}
 Constants for specifying a number format symbol. More...

Functions

UNumberFormatunum_open (UNumberFormatStyle style, const UChar *pattern, int32_t patternLength, const char *locale, UParseError *parseErr, UErrorCode *status)
 Create and return a new UNumberFormat for formatting and parsing numbers.
void unum_close (UNumberFormat *fmt)
 Close a UNumberFormat.
UNumberFormatunum_clone (const UNumberFormat *fmt, UErrorCode *status)
 Open a copy of a UNumberFormat.
int32_t unum_format (const UNumberFormat *fmt, int32_t number, UChar *result, int32_t resultLength, UFieldPosition *pos, UErrorCode *status)
 Format an integer using a UNumberFormat.
int32_t unum_formatInt64 (const UNumberFormat *fmt, int64_t number, UChar *result, int32_t resultLength, UFieldPosition *pos, UErrorCode *status)
 Format an int64 using a UNumberFormat.
int32_t unum_formatDouble (const UNumberFormat *fmt, double number, UChar *result, int32_t resultLength, UFieldPosition *pos, UErrorCode *status)
 Format a double using a UNumberFormat.
int32_t unum_formatDecimal (const UNumberFormat *fmt, const char *number, int32_t length, UChar *result, int32_t resultLength, UFieldPosition *pos, UErrorCode *status)
 Format a decimal number using a UNumberFormat.
int32_t unum_formatDoubleCurrency (const UNumberFormat *fmt, double number, UChar *currency, UChar *result, int32_t resultLength, UFieldPosition *pos, UErrorCode *status)
 Format a double currency amount using a UNumberFormat.
int32_t unum_parse (const UNumberFormat *fmt, const UChar *text, int32_t textLength, int32_t *parsePos, UErrorCode *status)
 Parse a string into an integer using a UNumberFormat.
int64_t unum_parseInt64 (const UNumberFormat *fmt, const UChar *text, int32_t textLength, int32_t *parsePos, UErrorCode *status)
 Parse a string into an int64 using a UNumberFormat.
double unum_parseDouble (const UNumberFormat *fmt, const UChar *text, int32_t textLength, int32_t *parsePos, UErrorCode *status)
 Parse a string into a double using a UNumberFormat.
int32_t unum_parseDecimal (const UNumberFormat *fmt, const UChar *text, int32_t textLength, int32_t *parsePos, char *outBuf, int32_t outBufLength, UErrorCode *status)
 Parse a number from a string into an unformatted numeric string using a UNumberFormat.
double unum_parseDoubleCurrency (const UNumberFormat *fmt, const UChar *text, int32_t textLength, int32_t *parsePos, UChar *currency, UErrorCode *status)
 Parse a string into a double and a currency using a UNumberFormat.
void unum_applyPattern (UNumberFormat *format, UBool localized, const UChar *pattern, int32_t patternLength, UParseError *parseError, UErrorCode *status)
 Set the pattern used by a UNumberFormat.
const char * unum_getAvailable (int32_t localeIndex)
 Get a locale for which decimal formatting patterns are available.
int32_t unum_countAvailable (void)
 Determine how many locales have decimal formatting patterns available.
int32_t unum_getAttribute (const UNumberFormat *fmt, UNumberFormatAttribute attr)
 Get a numeric attribute associated with a UNumberFormat.
void unum_setAttribute (UNumberFormat *fmt, UNumberFormatAttribute attr, int32_t newValue)
 Set a numeric attribute associated with a UNumberFormat.
double unum_getDoubleAttribute (const UNumberFormat *fmt, UNumberFormatAttribute attr)
 Get a numeric attribute associated with a UNumberFormat.
void unum_setDoubleAttribute (UNumberFormat *fmt, UNumberFormatAttribute attr, double newValue)
 Set a numeric attribute associated with a UNumberFormat.
int32_t unum_getTextAttribute (const UNumberFormat *fmt, UNumberFormatTextAttribute tag, UChar *result, int32_t resultLength, UErrorCode *status)
 Get a text attribute associated with a UNumberFormat.
void unum_setTextAttribute (UNumberFormat *fmt, UNumberFormatTextAttribute tag, const UChar *newValue, int32_t newValueLength, UErrorCode *status)
 Set a text attribute associated with a UNumberFormat.
int32_t unum_toPattern (const UNumberFormat *fmt, UBool isPatternLocalized, UChar *result, int32_t resultLength, UErrorCode *status)
 Extract the pattern from a UNumberFormat.
int32_t unum_getSymbol (const UNumberFormat *fmt, UNumberFormatSymbol symbol, UChar *buffer, int32_t size, UErrorCode *status)
 Get a symbol associated with a UNumberFormat.
void unum_setSymbol (UNumberFormat *fmt, UNumberFormatSymbol symbol, const UChar *value, int32_t length, UErrorCode *status)
 Set a symbol associated with a UNumberFormat.
const char * unum_getLocaleByType (const UNumberFormat *fmt, ULocDataLocaleType type, UErrorCode *status)
 Get the locale for this number format object.

Detailed Description

C API: NumberFormat.

Number Format C API

Number Format C API Provides functions for formatting and parsing a number. Also provides methods for determining which locales have number formats, and what their names are.

UNumberFormat helps you to format and parse numbers for any locale. Your code can be completely independent of the locale conventions for decimal points, thousands-separators, or even the particular decimal digits used, or whether the number format is even decimal. There are different number format styles like decimal, currency, percent and spellout.

To format a number for the current Locale, use one of the static factory methods:

 
    UChar myString[20];
    double myNumber = 7.0;
    UErrorCode status = U_ZERO_ERROR;
    UNumberFormat* nf = unum_open(UNUM_DEFAULT, NULL, -1, NULL, NULL, &status);
    unum_formatDouble(nf, myNumber, myString, 20, NULL, &status);
    printf(" Example 1: %s\n", austrdup(myString) ); //austrdup( a function used to convert UChar* to char*)

If you are formatting multiple numbers, it is more efficient to get the format and use it multiple times so that the system doesn't have to fetch the information about the local language and country conventions multiple times.

 
 uint32_t i, resultlength, reslenneeded;
 UErrorCode status = U_ZERO_ERROR;
 UFieldPosition pos;
 uint32_t a[] = { 123, 3333, -1234567 };
 const uint32_t a_len = sizeof(a) / sizeof(a[0]);
 UNumberFormat* nf;
 UChar* result = NULL;

 nf = unum_open(UNUM_DEFAULT, NULL, -1, NULL, NULL, &status);
 for (i = 0; i < a_len; i++) {
    resultlength=0;
    reslenneeded=unum_format(nf, a[i], NULL, resultlength, &pos, &status);
    result = NULL;
    if(status==U_BUFFER_OVERFLOW_ERROR){
       status=U_ZERO_ERROR;
       resultlength=reslenneeded+1;
       result=(UChar*)malloc(sizeof(UChar) * resultlength);
       unum_format(nf, a[i], result, resultlength, &pos, &status);
    }
    printf( " Example 2: %s\n", austrdup(result));
    free(result);
 }

To format a number for a different Locale, specify it in the call to unum_open().

 
     UNumberFormat* nf = unum_open(UNUM_DEFAULT, NULL, -1, "fr_FR", NULL, &success)

You can use a NumberFormat API unum_parse() to parse.

 
    UErrorCode status = U_ZERO_ERROR;
    int32_t pos=0;
    int32_t num;
    num = unum_parse(nf, str, u_strlen(str), &pos, &status);

Use UNUM_DECIMAL to get the normal number format for that country. There are other static options available. Use UNUM_CURRENCY to get the currency number format for that country. Use UNUM_PERCENT to get a format for displaying percentages. With this format, a fraction from 0.53 is displayed as 53%.

Use a pattern to create either a DecimalFormat or a RuleBasedNumberFormat formatter. The pattern must conform to the syntax defined for those formatters.

You can also control the display of numbers with such function as unum_getAttribues() and unum_setAtributes(), which let you set the miminum fraction digits, grouping, etc.

See also:
UNumberFormatAttributes for more details

You can also use forms of the parse and format methods with ParsePosition and UFieldPosition to allow you to:

It is also possible to change or set the symbols used for a particular locale like the currency symbol, the grouping seperator , monetary seperator etc by making use of functions unum_setSymbols() and unum_getSymbols().

Definition in file unum.h.


Typedef Documentation

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8

Definition at line 261 of file unum.h.

typedef void* UNumberFormat

A number formatter.

For usage in C programs.

Stable:
ICU 2.0

Definition at line 130 of file unum.h.

The possible UNumberFormat numeric attributes.

Stable:
ICU 2.0

The possible number format pad positions.

Stable:
ICU 2.0

The possible number format rounding modes.

Stable:
ICU 2.0

The possible number format styles.

Stable:
ICU 2.0

Constants for specifying a number format symbol.

Stable:
ICU 2.0

The possible UNumberFormat text attributes.

Stable:
ICU 2.0

Enumeration Type Documentation

Constants for specifying currency spacing.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8

Definition at line 255 of file unum.h.

The possible UNumberFormat numeric attributes.

Stable:
ICU 2.0
Enumerator:
UNUM_PARSE_INT_ONLY 

Parse integers only.

UNUM_GROUPING_USED 

Use grouping separator.

UNUM_DECIMAL_ALWAYS_SHOWN 

Always show decimal point.

UNUM_MAX_INTEGER_DIGITS 

Maximum integer digits.

UNUM_MIN_INTEGER_DIGITS 

Minimum integer digits.

UNUM_INTEGER_DIGITS 

Integer digits.

UNUM_MAX_FRACTION_DIGITS 

Maximum fraction digits.

UNUM_MIN_FRACTION_DIGITS 

Minimum fraction digits.

UNUM_FRACTION_DIGITS 

Fraction digits.

UNUM_MULTIPLIER 

Multiplier.

UNUM_GROUPING_SIZE 

Grouping size.

UNUM_ROUNDING_MODE 

Rounding Mode.

UNUM_ROUNDING_INCREMENT 

Rounding increment.

UNUM_FORMAT_WIDTH 

The width to which the output of format() is padded.

UNUM_PADDING_POSITION 

The position at which padding will take place.

UNUM_SECONDARY_GROUPING_SIZE 

Secondary grouping size.

UNUM_SIGNIFICANT_DIGITS_USED 

Use significant digits.

Stable:
ICU 3.0
UNUM_MIN_SIGNIFICANT_DIGITS 

Minimum significant digits.

Stable:
ICU 3.0
UNUM_MAX_SIGNIFICANT_DIGITS 

Maximum significant digits.

Stable:
ICU 3.0
UNUM_LENIENT_PARSE 

Lenient parse mode used by rule-based formats.

Stable:
ICU 3.0

Definition at line 679 of file unum.h.

The possible number format pad positions.

Stable:
ICU 2.0

Definition at line 244 of file unum.h.

The possible number format rounding modes.

Stable:
ICU 2.0
Enumerator:
UNUM_FOUND_HALFEVEN 

Half-even rounding, misspelled name.

Deprecated:
, ICU 3.8
UNUM_ROUND_UNNECESSARY 

ROUND_UNNECESSARY reports an error if formatted result is not exact.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8
UNUM_ROUND_HALFEVEN 

Half-even rounding.

Stable:
, ICU 3.8

Definition at line 217 of file unum.h.

The possible number format styles.

Stable:
ICU 2.0
Enumerator:
UNUM_PATTERN_DECIMAL 

Decimal format defined by a pattern string.

Stable:
ICU 3.0
UNUM_DECIMAL 

Decimal format ("normal" style).

Stable:
ICU 2.0
UNUM_CURRENCY 

Currency format with a currency symbol, e.g., "$1.00".

Stable:
ICU 2.0
UNUM_PERCENT 

Percent format.

Stable:
ICU 2.0
UNUM_SCIENTIFIC 

Scientific format.

Stable:
ICU 2.1
UNUM_SPELLOUT 

Spellout rule-based format.

Stable:
ICU 2.0
UNUM_ORDINAL 

Ordinal rule-based format.

Stable:
ICU 3.0
UNUM_DURATION 

Duration rule-based format.

Stable:
ICU 3.0
UNUM_NUMBERING_SYSTEM 

Numbering system rule-based format.

Stable:
ICU 4.2
UNUM_PATTERN_RULEBASED 

Rule-based format defined by a pattern string.

Stable:
ICU 3.0
UNUM_CURRENCY_ISO 

Currency format with an ISO currency code, e.g., "USD1.00".

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8
UNUM_CURRENCY_PLURAL 

Currency format with a pluralized currency name, e.g., "1.00 US dollar" and "3.00 US dollars".

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8
UNUM_FORMAT_STYLE_COUNT 

One more than the highest number format style constant.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.8
UNUM_DEFAULT 

Default format.

Stable:
ICU 2.0
UNUM_IGNORE 

Alias for UNUM_PATTERN_DECIMAL.

Stable:
ICU 3.0

Definition at line 135 of file unum.h.

Constants for specifying a number format symbol.

Stable:
ICU 2.0
Enumerator:
UNUM_DECIMAL_SEPARATOR_SYMBOL 

The decimal separator.

UNUM_GROUPING_SEPARATOR_SYMBOL 

The grouping separator.

UNUM_PATTERN_SEPARATOR_SYMBOL 

The pattern separator.

UNUM_PERCENT_SYMBOL 

The percent sign.

UNUM_ZERO_DIGIT_SYMBOL 

Zero.

UNUM_DIGIT_SYMBOL 

Character representing a digit in the pattern.

UNUM_MINUS_SIGN_SYMBOL 

The minus sign.

UNUM_PLUS_SIGN_SYMBOL 

The plus sign.

UNUM_CURRENCY_SYMBOL 

The currency symbol.

UNUM_INTL_CURRENCY_SYMBOL 

The international currency symbol.

UNUM_MONETARY_SEPARATOR_SYMBOL 

The monetary separator.

UNUM_EXPONENTIAL_SYMBOL 

The exponential symbol.

UNUM_PERMILL_SYMBOL 

Per mill symbol.

UNUM_PAD_ESCAPE_SYMBOL 

Escape padding character.

UNUM_INFINITY_SYMBOL 

Infinity symbol.

UNUM_NAN_SYMBOL 

Nan symbol.

UNUM_SIGNIFICANT_DIGIT_SYMBOL 

Significant digit symbol.

Stable:
ICU 3.0
UNUM_MONETARY_GROUPING_SEPARATOR_SYMBOL 

The monetary grouping separator.

Stable:
ICU 3.6
UNUM_ONE_DIGIT_SYMBOL 

One.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_TWO_DIGIT_SYMBOL 

Two.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_THREE_DIGIT_SYMBOL 

Three.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_FOUR_DIGIT_SYMBOL 

Four.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_FIVE_DIGIT_SYMBOL 

Five.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_SIX_DIGIT_SYMBOL 

Six.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_SEVEN_DIGIT_SYMBOL 

Seven.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_EIGHT_DIGIT_SYMBOL 

Eight.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_NINE_DIGIT_SYMBOL 

Nine.

Draft:
This API may be changed in the future versions and was introduced in ICU 4.6
UNUM_FORMAT_SYMBOL_COUNT 

count symbol constants

Definition at line 913 of file unum.h.

The possible UNumberFormat text attributes.

Stable:
ICU 2.0
Enumerator:
UNUM_POSITIVE_PREFIX 

Positive prefix.

UNUM_POSITIVE_SUFFIX 

Positive suffix.

UNUM_NEGATIVE_PREFIX 

Negative prefix.

UNUM_NEGATIVE_SUFFIX 

Negative suffix.

UNUM_PADDING_CHARACTER 

The character used to pad to the format width.

UNUM_CURRENCY_CODE 

The ISO currency code.

UNUM_DEFAULT_RULESET 

The default rule set.

This is only available with rule-based formatters.

Stable:
ICU 3.0
UNUM_PUBLIC_RULESETS 

The public rule sets.

This is only available with rule-based formatters. This is a read-only attribute. The public rulesets are returned as a single string, with each ruleset name delimited by ';' (semicolon).

Stable:
ICU 3.0

Definition at line 810 of file unum.h.


Function Documentation

void unum_applyPattern ( UNumberFormat format,
UBool  localized,
const UChar pattern,
int32_t  patternLength,
UParseError parseError,
UErrorCode status 
)

Set the pattern used by a UNumberFormat.

This can only be used on a DecimalFormat, other formats return U_ILLEGAL_ARGUMENT_ERROR in the status.

Parameters:
formatThe formatter to set.
localizedTRUE if the pattern is localized, FALSE otherwise.
patternThe new pattern
patternLengthThe length of pattern, or -1 if null-terminated.
parseErrorA pointer to UParseError to recieve information about errors occurred during parsing, or NULL if no parse error information is desired.
statusA pointer to an input-output UErrorCode.
See also:
unum_toPattern
DecimalFormat
Stable:
ICU 2.0
UNumberFormat* unum_clone ( const UNumberFormat fmt,
UErrorCode status 
)

Open a copy of a UNumberFormat.

This function performs a deep copy.

Parameters:
fmtThe format to copy
statusA pointer to an UErrorCode to receive any errors.
Returns:
A pointer to a UNumberFormat identical to fmt.
Stable:
ICU 2.0
void unum_close ( UNumberFormat fmt)

Close a UNumberFormat.

Once closed, a UNumberFormat may no longer be used.

Parameters:
fmtThe formatter to close.
Stable:
ICU 2.0

Determine how many locales have decimal formatting patterns available.

The results of this call are not valid for rule-based number formats. This function is useful for determining the loop ending condition for calls to unum_getAvailable.

Returns:
The number of locales for which decimal formatting patterns are available.
See also:
unum_getAvailable
Stable:
ICU 2.0
int32_t unum_format ( const UNumberFormat fmt,
int32_t  number,
UChar result,
int32_t  resultLength,
UFieldPosition pos,
UErrorCode status 
)

Format an integer using a UNumberFormat.

The integer will be formatted according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
numberThe number to format.
resultA pointer to a buffer to receive the formatted number.
resultLengthThe maximum size of result.
posA pointer to a UFieldPosition. On input, position->field is read. On output, position->beginIndex and position->endIndex indicate the beginning and ending indices of field number position->field, if such a field exists. This parameter may be NULL, in which case no field
statusA pointer to an UErrorCode to receive any errors
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_formatInt64
unum_formatDouble
unum_parse
unum_parseInt64
unum_parseDouble
UFieldPosition
Stable:
ICU 2.0
int32_t unum_formatDecimal ( const UNumberFormat fmt,
const char *  number,
int32_t  length,
UChar result,
int32_t  resultLength,
UFieldPosition pos,
UErrorCode status 
)

Format a decimal number using a UNumberFormat.

The number will be formatted according to the UNumberFormat's locale. The syntax of the input number is a "numeric string" as defined in the Decimal Arithmetic Specification, available at http://speleotrove.com/decimal

Parameters:
fmtThe formatter to use.
numberThe number to format.
lengthThe length of the input number, or -1 if the input is nul-terminated.
resultA pointer to a buffer to receive the formatted number.
resultLengthThe maximum size of result.
posA pointer to a UFieldPosition. On input, position->field is read. On output, position->beginIndex and position->endIndex indicate the beginning and ending indices of field number position->field, if such a field exists. This parameter may be NULL, in which case it is ignored.
statusA pointer to an UErrorCode to receive any errors
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_format
unum_formatInt64
unum_parse
unum_parseInt64
unum_parseDouble
UFieldPosition
Stable:
ICU 4.4
int32_t unum_formatDouble ( const UNumberFormat fmt,
double  number,
UChar result,
int32_t  resultLength,
UFieldPosition pos,
UErrorCode status 
)

Format a double using a UNumberFormat.

The double will be formatted according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
numberThe number to format.
resultA pointer to a buffer to receive the formatted number.
resultLengthThe maximum size of result.
posA pointer to a UFieldPosition. On input, position->field is read. On output, position->beginIndex and position->endIndex indicate the beginning and ending indices of field number position->field, if such a field exists. This parameter may be NULL, in which case no field
statusA pointer to an UErrorCode to receive any errors
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_format
unum_formatInt64
unum_parse
unum_parseInt64
unum_parseDouble
UFieldPosition
Stable:
ICU 2.0
int32_t unum_formatDoubleCurrency ( const UNumberFormat fmt,
double  number,
UChar currency,
UChar result,
int32_t  resultLength,
UFieldPosition pos,
UErrorCode status 
)

Format a double currency amount using a UNumberFormat.

The double will be formatted according to the UNumberFormat's locale.

Parameters:
fmtthe formatter to use
numberthe number to format
currencythe 3-letter null-terminated ISO 4217 currency code
resulta pointer to the buffer to receive the formatted number
resultLengththe maximum number of UChars to write to result
posa pointer to a UFieldPosition. On input, position->field is read. On output, position->beginIndex and position->endIndex indicate the beginning and ending indices of field number position->field, if such a field exists. This parameter may be NULL, in which case it is ignored.
statusa pointer to an input-output UErrorCode
Returns:
the total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_formatDouble
unum_parseDoubleCurrency
UFieldPosition
Stable:
ICU 3.0
int32_t unum_formatInt64 ( const UNumberFormat fmt,
int64_t  number,
UChar result,
int32_t  resultLength,
UFieldPosition pos,
UErrorCode status 
)

Format an int64 using a UNumberFormat.

The int64 will be formatted according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
numberThe number to format.
resultA pointer to a buffer to receive the formatted number.
resultLengthThe maximum size of result.
posA pointer to a UFieldPosition. On input, position->field is read. On output, position->beginIndex and position->endIndex indicate the beginning and ending indices of field number position->field, if such a field exists. This parameter may be NULL, in which case no field
statusA pointer to an UErrorCode to receive any errors
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_format
unum_formatDouble
unum_parse
unum_parseInt64
unum_parseDouble
UFieldPosition
Stable:
ICU 2.0

Get a numeric attribute associated with a UNumberFormat.

An example of a numeric attribute is the number of integer digits a formatter will produce.

Parameters:
fmtThe formatter to query.
attrThe attribute to query; one of UNUM_PARSE_INT_ONLY, UNUM_GROUPING_USED, UNUM_DECIMAL_ALWAYS_SHOWN, UNUM_MAX_INTEGER_DIGITS, UNUM_MIN_INTEGER_DIGITS, UNUM_INTEGER_DIGITS, UNUM_MAX_FRACTION_DIGITS, UNUM_MIN_FRACTION_DIGITS, UNUM_FRACTION_DIGITS, UNUM_MULTIPLIER, UNUM_GROUPING_SIZE, UNUM_ROUNDING_MODE, UNUM_FORMAT_WIDTH, UNUM_PADDING_POSITION, UNUM_SECONDARY_GROUPING_SIZE.
Returns:
The value of attr.
See also:
unum_setAttribute
unum_getDoubleAttribute
unum_setDoubleAttribute
unum_getTextAttribute
unum_setTextAttribute
Stable:
ICU 2.0
const char* unum_getAvailable ( int32_t  localeIndex)

Get a locale for which decimal formatting patterns are available.

A UNumberFormat in a locale returned by this function will perform the correct formatting and parsing for the locale. The results of this call are not valid for rule-based number formats.

Parameters:
localeIndexThe index of the desired locale.
Returns:
A locale for which number formatting patterns are available, or 0 if none.
See also:
unum_countAvailable
Stable:
ICU 2.0
double unum_getDoubleAttribute ( const UNumberFormat fmt,
UNumberFormatAttribute  attr 
)

Get a numeric attribute associated with a UNumberFormat.

An example of a numeric attribute is the number of integer digits a formatter will produce. If the formatter does not understand the attribute, -1 is returned.

Parameters:
fmtThe formatter to query.
attrThe attribute to query; e.g. UNUM_ROUNDING_INCREMENT.
Returns:
The value of attr.
See also:
unum_getAttribute
unum_setAttribute
unum_setDoubleAttribute
unum_getTextAttribute
unum_setTextAttribute
Stable:
ICU 2.0
const char* unum_getLocaleByType ( const UNumberFormat fmt,
ULocDataLocaleType  type,
UErrorCode status 
)

Get the locale for this number format object.

You can choose between valid and actual locale.

Parameters:
fmtThe formatter to get the locale from
typetype of the locale we're looking for (valid or actual)
statuserror code for the operation
Returns:
the locale name
Stable:
ICU 2.8
int32_t unum_getSymbol ( const UNumberFormat fmt,
UNumberFormatSymbol  symbol,
UChar buffer,
int32_t  size,
UErrorCode status 
)

Get a symbol associated with a UNumberFormat.

A UNumberFormat uses symbols to represent the special locale-dependent characters in a number, for example the percent sign. This API is not supported for rule-based formatters.

Parameters:
fmtThe formatter to query.
symbolThe UNumberFormatSymbol constant for the symbol to get
bufferThe string buffer that will receive the symbol string; if it is NULL, then only the length of the symbol is returned
sizeThe size of the string buffer
statusA pointer to an UErrorCode to receive any errors
Returns:
The length of the symbol; the buffer is not modified if length>=size
See also:
unum_setSymbol
Stable:
ICU 2.0
int32_t unum_getTextAttribute ( const UNumberFormat fmt,
UNumberFormatTextAttribute  tag,
UChar result,
int32_t  resultLength,
UErrorCode status 
)

Get a text attribute associated with a UNumberFormat.

An example of a text attribute is the suffix for positive numbers. If the formatter does not understand the attributre, U_UNSUPPORTED_ERROR is returned as the status. Rule-based formatters only understand UNUM_DEFAULT_RULESET and UNUM_PUBLIC_RULESETS.

Parameters:
fmtThe formatter to query.
tagThe attribute to query; one of UNUM_POSITIVE_PREFIX, UNUM_POSITIVE_SUFFIX, UNUM_NEGATIVE_PREFIX, UNUM_NEGATIVE_SUFFIX, UNUM_PADDING_CHARACTER, UNUM_CURRENCY_CODE, UNUM_DEFAULT_RULESET, or UNUM_PUBLIC_RULESETS.
resultA pointer to a buffer to receive the attribute.
resultLengthThe maximum size of result.
statusA pointer to an UErrorCode to receive any errors
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_setTextAttribute
unum_getAttribute
unum_setAttribute
Stable:
ICU 2.0
UNumberFormat* unum_open ( UNumberFormatStyle  style,
const UChar pattern,
int32_t  patternLength,
const char *  locale,
UParseError parseErr,
UErrorCode status 
)

Create and return a new UNumberFormat for formatting and parsing numbers.

A UNumberFormat may be used to format numbers by calling unum_format, and to parse numbers by calling unum_parse. The caller must call unum_close when done to release resources used by this object.

Parameters:
styleThe type of number format to open: one of UNUM_DECIMAL, UNUM_CURRENCY, UNUM_PERCENT, UNUM_SCIENTIFIC, UNUM_SPELLOUT, UNUM_PATTERN_DECIMAL, UNUM_PATTERN_RULEBASED, or UNUM_DEFAULT. If UNUM_PATTERN_DECIMAL or UNUM_PATTERN_RULEBASED is passed then the number format is opened using the given pattern, which must conform to the syntax described in DecimalFormat or RuleBasedNumberFormat, respectively.
patternA pattern specifying the format to use. This parameter is ignored unless the style is UNUM_PATTERN_DECIMAL or UNUM_PATTERN_RULEBASED.
patternLengthThe number of characters in the pattern, or -1 if null-terminated. This parameter is ignored unless the style is UNUM_PATTERN.
localeA locale identifier to use to determine formatting and parsing conventions, or NULL to use the default locale.
parseErrA pointer to a UParseError struct to receive the details of any parsing errors, or NULL if no parsing error details are desired.
statusA pointer to an input-output UErrorCode.
Returns:
A pointer to a newly created UNumberFormat, or NULL if an error occurred.
See also:
unum_close
DecimalFormat
Stable:
ICU 2.0
int32_t unum_parse ( const UNumberFormat fmt,
const UChar text,
int32_t  textLength,
int32_t parsePos,
UErrorCode status 
)

Parse a string into an integer using a UNumberFormat.

The string will be parsed according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf not 0, on input a pointer to an integer specifying the offset at which to begin parsing. If not 0, on output the offset at which parsing ended.
statusA pointer to an UErrorCode to receive any errors
Returns:
The value of the parsed integer
See also:
unum_parseInt64
unum_parseDouble
unum_format
unum_formatInt64
unum_formatDouble
Stable:
ICU 2.0
int32_t unum_parseDecimal ( const UNumberFormat fmt,
const UChar text,
int32_t  textLength,
int32_t parsePos,
char *  outBuf,
int32_t  outBufLength,
UErrorCode status 
)

Parse a number from a string into an unformatted numeric string using a UNumberFormat.

The input string will be parsed according to the UNumberFormat's locale. The syntax of the output is a "numeric string" as defined in the Decimal Arithmetic Specification, available at http://speleotrove.com/decimal

Parameters:
fmtThe formatter to use.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf not 0, on input a pointer to an integer specifying the offset at which to begin parsing. If not 0, on output the offset at which parsing ended.
outBufA (char *) buffer to receive the parsed number as a string. The output string will be nul-terminated if there is sufficient space.
outBufLengthThe size of the output buffer. May be zero, in which case the outBuf pointer may be NULL, and the function will return the size of the output string.
statusA pointer to an UErrorCode to receive any errors
Returns:
the length of the output string, not including any terminating nul.
See also:
unum_parse
unum_parseInt64
unum_format
unum_formatInt64
unum_formatDouble
Stable:
ICU 4.4
double unum_parseDouble ( const UNumberFormat fmt,
const UChar text,
int32_t  textLength,
int32_t parsePos,
UErrorCode status 
)

Parse a string into a double using a UNumberFormat.

The string will be parsed according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf not 0, on input a pointer to an integer specifying the offset at which to begin parsing. If not 0, on output the offset at which parsing ended.
statusA pointer to an UErrorCode to receive any errors
Returns:
The value of the parsed double
See also:
unum_parse
unum_parseInt64
unum_format
unum_formatInt64
unum_formatDouble
Stable:
ICU 2.0
double unum_parseDoubleCurrency ( const UNumberFormat fmt,
const UChar text,
int32_t  textLength,
int32_t parsePos,
UChar currency,
UErrorCode status 
)

Parse a string into a double and a currency using a UNumberFormat.

The string will be parsed according to the UNumberFormat's locale.

Parameters:
fmtthe formatter to use
textthe text to parse
textLengththe length of text, or -1 if null-terminated
parsePosa pointer to an offset index into text at which to begin parsing. On output, *parsePos will point after the last parsed character. This parameter may be 0, in which case parsing begins at offset 0.
currencya pointer to the buffer to receive the parsed null- terminated currency. This buffer must have a capacity of at least 4 UChars.
statusa pointer to an input-output UErrorCode
Returns:
the parsed double
See also:
unum_parseDouble
unum_formatDoubleCurrency
Stable:
ICU 3.0
int64_t unum_parseInt64 ( const UNumberFormat fmt,
const UChar text,
int32_t  textLength,
int32_t parsePos,
UErrorCode status 
)

Parse a string into an int64 using a UNumberFormat.

The string will be parsed according to the UNumberFormat's locale.

Parameters:
fmtThe formatter to use.
textThe text to parse.
textLengthThe length of text, or -1 if null-terminated.
parsePosIf not 0, on input a pointer to an integer specifying the offset at which to begin parsing. If not 0, on output the offset at which parsing ended.
statusA pointer to an UErrorCode to receive any errors
Returns:
The value of the parsed integer
See also:
unum_parse
unum_parseDouble
unum_format
unum_formatInt64
unum_formatDouble
Stable:
ICU 2.8
void unum_setAttribute ( UNumberFormat fmt,
UNumberFormatAttribute  attr,
int32_t  newValue 
)

Set a numeric attribute associated with a UNumberFormat.

An example of a numeric attribute is the number of integer digits a formatter will produce. If the formatter does not understand the attribute, the call is ignored. Rule-based formatters only understand the lenient-parse attribute.

Parameters:
fmtThe formatter to set.
attrThe attribute to set; one of UNUM_PARSE_INT_ONLY, UNUM_GROUPING_USED, UNUM_DECIMAL_ALWAYS_SHOWN, UNUM_MAX_INTEGER_DIGITS, UNUM_MIN_INTEGER_DIGITS, UNUM_INTEGER_DIGITS, UNUM_MAX_FRACTION_DIGITS, UNUM_MIN_FRACTION_DIGITS, UNUM_FRACTION_DIGITS, UNUM_MULTIPLIER, UNUM_GROUPING_SIZE, UNUM_ROUNDING_MODE, UNUM_FORMAT_WIDTH, UNUM_PADDING_POSITION, UNUM_SECONDARY_GROUPING_SIZE, or UNUM_LENIENT_PARSE.
newValueThe new value of attr.
See also:
unum_getAttribute
unum_getDoubleAttribute
unum_setDoubleAttribute
unum_getTextAttribute
unum_setTextAttribute
Stable:
ICU 2.0
void unum_setDoubleAttribute ( UNumberFormat fmt,
UNumberFormatAttribute  attr,
double  newValue 
)

Set a numeric attribute associated with a UNumberFormat.

An example of a numeric attribute is the number of integer digits a formatter will produce. If the formatter does not understand the attribute, this call is ignored.

Parameters:
fmtThe formatter to set.
attrThe attribute to set; e.g. UNUM_ROUNDING_INCREMENT.
newValueThe new value of attr.
See also:
unum_getAttribute
unum_setAttribute
unum_getDoubleAttribute
unum_getTextAttribute
unum_setTextAttribute
Stable:
ICU 2.0
void unum_setSymbol ( UNumberFormat fmt,
UNumberFormatSymbol  symbol,
const UChar value,
int32_t  length,
UErrorCode status 
)

Set a symbol associated with a UNumberFormat.

A UNumberFormat uses symbols to represent the special locale-dependent characters in a number, for example the percent sign. This API is not supported for rule-based formatters.

Parameters:
fmtThe formatter to set.
symbolThe UNumberFormatSymbol constant for the symbol to set
valueThe string to set the symbol to
lengthThe length of the string, or -1 for a zero-terminated string
statusA pointer to an UErrorCode to receive any errors.
See also:
unum_getSymbol
Stable:
ICU 2.0
void unum_setTextAttribute ( UNumberFormat fmt,
UNumberFormatTextAttribute  tag,
const UChar newValue,
int32_t  newValueLength,
UErrorCode status 
)

Set a text attribute associated with a UNumberFormat.

An example of a text attribute is the suffix for positive numbers. Rule-based formatters only understand UNUM_DEFAULT_RULESET.

Parameters:
fmtThe formatter to set.
tagThe attribute to set; one of UNUM_POSITIVE_PREFIX, UNUM_POSITIVE_SUFFIX, UNUM_NEGATIVE_PREFIX, UNUM_NEGATIVE_SUFFIX, UNUM_PADDING_CHARACTER, UNUM_CURRENCY_CODE, or UNUM_DEFAULT_RULESET.
newValueThe new value of attr.
newValueLengthThe length of newValue, or -1 if null-terminated.
statusA pointer to an UErrorCode to receive any errors
See also:
unum_getTextAttribute
unum_getAttribute
unum_setAttribute
Stable:
ICU 2.0
int32_t unum_toPattern ( const UNumberFormat fmt,
UBool  isPatternLocalized,
UChar result,
int32_t  resultLength,
UErrorCode status 
)

Extract the pattern from a UNumberFormat.

The pattern will follow the DecimalFormat pattern syntax.

Parameters:
fmtThe formatter to query.
isPatternLocalizedTRUE if the pattern should be localized, FALSE otherwise. This is ignored if the formatter is a rule-based formatter.
resultA pointer to a buffer to receive the pattern.
resultLengthThe maximum size of result.
statusA pointer to an input-output UErrorCode.
Returns:
The total buffer size needed; if greater than resultLength, the output was truncated.
See also:
unum_applyPattern
DecimalFormat
Stable:
ICU 2.0
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