ulistformatter.h File Reference

C API: Format a list in a locale-appropriate way. More...

`#include "unicode/utypes.h"`
`#include "unicode/uformattedvalue.h"`
`#include "unicode/localpointer.h"`

Go to the source code of this file.

## Namespaces

namespace | icu
| File coll.h.

## Typedefs

typedef struct UListFormatter | UListFormatter
| C typedef for struct UListFormatter.
typedef struct UFormattedList | UFormattedList
| Opaque struct to contain the results of a UListFormatter operation.
typedef enum UListFormatterField | UListFormatterField
| FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter.
typedef enum UListFormatterType | UListFormatterType
| Type of meaning expressed by the list.
typedef enum UListFormatterWidth | UListFormatterWidth
| Verbosity level of the list patterns.

## Enumerations

enum | UListFormatterField { ULISTFMT_LITERAL_FIELD , ULISTFMT_ELEMENT_FIELD }
| FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter. More...
enum | UListFormatterType { ULISTFMT_TYPE_AND , ULISTFMT_TYPE_OR , ULISTFMT_TYPE_UNITS }
| Type of meaning expressed by the list. More...
enum | UListFormatterWidth { ULISTFMT_WIDTH_WIDE , ULISTFMT_WIDTH_SHORT , ULISTFMT_WIDTH_NARROW }
| Verbosity level of the list patterns. More...

## Functions

U_CAPI UListFormatter * | ulistfmt_open (const char *locale, UErrorCode *status)
| Open a new UListFormatter object using the rules for a given locale.
U_CAPI UListFormatter * | ulistfmt_openForType (const char *locale, UListFormatterType type, UListFormatterWidth width, UErrorCode *status)
| Open a new UListFormatter object appropriate for the given locale, list type, and style.
U_CAPI void | ulistfmt_close (UListFormatter *listfmt)
| Close a UListFormatter object.
U_CAPI UFormattedList * | ulistfmt_openResult (UErrorCode *ec)
| Creates an object to hold the result of a UListFormatter operation.
U_CAPI const UFormattedValue * | ulistfmt_resultAsValue (const UFormattedList *uresult, UErrorCode *ec)
| Returns a representation of a UFormattedList as a UFormattedValue, which can be subsequently passed to any API requiring that type.
U_CAPI void | ulistfmt_closeResult (UFormattedList *uresult)
| Releases the UFormattedList created by ulistfmt_openResult().
U_CAPI int32_t | ulistfmt_format (const UListFormatter *listfmt, const UChar *const strings[], const int32_t *stringLengths, int32_t stringCount, UChar *result, int32_t resultCapacity, UErrorCode *status)
| Formats a list of strings using the conventions established for the UListFormatter object.
U_CAPI void | ulistfmt_formatStringsToResult (const UListFormatter *listfmt, const UChar *const strings[], const int32_t *stringLengths, int32_t stringCount, UFormattedList *uresult, UErrorCode *status)
| Formats a list of strings to a UFormattedList, which exposes more information than the string exported by ulistfmt_format().

## Detailed Description

C API: Format a list in a locale-appropriate way.

A UListFormatter is used to format a list of items in a locale-appropriate way, using data from CLDR. Example: Input data ["Alice", "Bob", "Charlie", "Delta"] will be formatted as "Alice, Bob, Charlie, and Delta" in English.

Definition in file ulistformatter.h.

## Typedef Documentation

## UFormattedList

typedef struct UFormattedList UFormattedList

Opaque struct to contain the results of a UListFormatter operation.

Stable:
  ICU 64

Definition at line 45 of file ulistformatter.h.

## UListFormatter

typedef struct UListFormatter UListFormatter

C typedef for struct UListFormatter.

Stable:
  ICU 55

Definition at line 38 of file ulistformatter.h.

## UListFormatterField

typedef enum UListFormatterField UListFormatterField

FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter.

Stable:
  ICU 63

## UListFormatterType

typedef enum UListFormatterType UListFormatterType

Type of meaning expressed by the list.

Stable:
  ICU 67

## UListFormatterWidth

typedef enum UListFormatterWidth UListFormatterWidth

Verbosity level of the list patterns.

Stable:
  ICU 67

## Enumeration Type Documentation

## UListFormatterField

enum UListFormatterField

FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter.

Stable:
  ICU 63

Enumerator

ULISTFMT_LITERAL_FIELD

The literal text in the result which came from the resources.

Stable:
  ICU 63

ULISTFMT_ELEMENT_FIELD

The element text in the result which came from the input strings.

Stable:
  ICU 63

Definition at line 52 of file ulistformatter.h.

## UListFormatterType

enum UListFormatterType

Type of meaning expressed by the list.

Stable:
  ICU 67

Enumerator

ULISTFMT_TYPE_AND

Conjunction formatting, e.g.

"Alice, Bob, Charlie, and Delta".

Stable:
  ICU 67

ULISTFMT_TYPE_OR

Disjunction (or alternative, or simply one of) formatting, e.g.

"Alice, Bob, Charlie, or Delta".

Stable:
  ICU 67

ULISTFMT_TYPE_UNITS

Formatting of a list of values with units, e.g.

"5 pounds, 12 ounces".

Stable:
  ICU 67

Definition at line 70 of file ulistformatter.h.

## UListFormatterWidth

enum UListFormatterWidth

Verbosity level of the list patterns.

Stable:
  ICU 67

Enumerator

ULISTFMT_WIDTH_WIDE

Use list formatting with full words (no abbreviations) when possible.

Stable:
  ICU 67

ULISTFMT_WIDTH_SHORT

Use list formatting of typical length.

Stable:
  ICU 67

ULISTFMT_WIDTH_NARROW

Use list formatting of the shortest possible length.

Stable:
  ICU 67

Definition at line 99 of file ulistformatter.h.

## Function Documentation

## ulistfmt_close()

U_CAPI void ulistfmt_close | ( | UListFormatter * | listfmt | ) |

Close a UListFormatter object.

Once closed it may no longer be used.

Parameters

  listfmt | The UListFormatter object to close.

Stable:
  ICU 55

## ulistfmt_closeResult()

U_CAPI void ulistfmt_closeResult | ( | UFormattedList * | uresult | ) |

Releases the UFormattedList created by ulistfmt_openResult().

Parameters

  uresult | The object to release.

Stable:
  ICU 64

## ulistfmt_format()

U_CAPI int32_t ulistfmt_format | ( | const UListFormatter * | listfmt,
|  | const UChar *const | strings[],
|  | const int32_t * | stringLengths,
|  | int32_t | stringCount,
|  | UChar * | result,
|  | int32_t | resultCapacity,
|  | UErrorCode * | status
| ) |  |

Formats a list of strings using the conventions established for the UListFormatter object.

Parameters

  listfmt | The UListFormatter object specifying the list conventions.
  strings | An array of pointers to UChar strings; the array length is specified by stringCount. Must be non-NULL if stringCount > 0.
  stringLengths | An array of string lengths corresponding to the strings[] parameter; any individual length value may be negative to indicate that the corresponding strings[] entry is 0-terminated, or stringLengths itself may be NULL if all of the strings are 0-terminated. If non-NULL, the stringLengths array must have stringCount entries.
  stringCount | the number of entries in strings[], and the number of entries in the stringLengths array if it is not NULL. Must be >= 0.
  result | A pointer to a buffer to receive the formatted list.
  resultCapacity | The maximum size of result.
  status | A pointer to a standard ICU UErrorCode (input/output parameter). Its input value must pass the U_SUCCESS() test, or else the function returns immediately. The caller should check its output value with U_FAILURE(), or use with function chaining (see User Guide for details).

Returns
  The total buffer size needed; if greater than resultLength, the output was truncated. May be <=0 if unable to determine the total buffer size needed (e.g. for illegal arguments).

Stable:
  ICU 55

## ulistfmt_formatStringsToResult()

U_CAPI void ulistfmt_formatStringsToResult | ( | const UListFormatter * | listfmt,
|  | const UChar *const | strings[],
|  | const int32_t * | stringLengths,
|  | int32_t | stringCount,
|  | UFormattedList * | uresult,
|  | UErrorCode * | status
| ) |  |

Formats a list of strings to a UFormattedList, which exposes more information than the string exported by ulistfmt_format().

Parameters

  listfmt | The UListFormatter object specifying the list conventions.
  strings | An array of pointers to UChar strings; the array length is specified by stringCount. Must be non-NULL if stringCount > 0.
  stringLengths | An array of string lengths corresponding to the strings[] parameter; any individual length value may be negative to indicate that the corresponding strings[] entry is 0-terminated, or stringLengths itself may be NULL if all of the strings are 0-terminated. If non-NULL, the stringLengths array must have stringCount entries.
  stringCount | the number of entries in strings[], and the number of entries in the stringLengths array if it is not NULL. Must be >= 0.
  uresult | The object in which to store the result of the list formatting operation. See ulistfmt_openResult().
  status | Error code set if an error occurred during formatting.

Stable:
  ICU 64

## ulistfmt_open()

U_CAPI UListFormatter * ulistfmt_open | ( | const char * | locale,
|  | UErrorCode * | status
| ) |  |

Open a new UListFormatter object using the rules for a given locale.

The object will be initialized with AND type and WIDE width.

Parameters

  locale | The locale whose rules should be used; may be NULL for default locale.
  status | A pointer to a standard ICU UErrorCode (input/output parameter). Its input value must pass the U_SUCCESS() test, or else the function returns immediately. The caller should check its output value with U_FAILURE(), or use with function chaining (see User Guide for details).

Returns
  A pointer to a UListFormatter object for the specified locale, or NULL if an error occurred.

Stable:
  ICU 55

## ulistfmt_openForType()

U_CAPI UListFormatter * ulistfmt_openForType | ( | const char * | locale,
|  | UListFormatterType | type,
|  | UListFormatterWidth | width,
|  | UErrorCode * | status
| ) |  |

Open a new UListFormatter object appropriate for the given locale, list type, and style.

Parameters

  locale | The locale whose rules should be used; may be NULL for default locale.
  type | The type of list formatting to use.
  width | The width of formatting to use.
  status | A pointer to a standard ICU UErrorCode (input/output parameter). Its input value must pass the U_SUCCESS() test, or else the function returns immediately. The caller should check its output value with U_FAILURE(), or use with function chaining (see User Guide for details).

Returns
  A pointer to a UListFormatter object for the specified locale, or NULL if an error occurred.

Stable:
  ICU 67

## ulistfmt_openResult()

U_CAPI UFormattedList * ulistfmt_openResult | ( | UErrorCode * | ec | ) |

Creates an object to hold the result of a UListFormatter operation.

The object can be used repeatedly; it is cleared whenever passed to a format function.

Parameters

  ec | Set if an error occurs.

Returns
  A pointer needing ownership.

Stable:
  ICU 64

## ulistfmt_resultAsValue()

U_CAPI const UFormattedValue * ulistfmt_resultAsValue | ( | const UFormattedList * | uresult,
|  | UErrorCode * | ec
| ) |  |

Returns a representation of a UFormattedList as a UFormattedValue, which can be subsequently passed to any API requiring that type.

The returned object is owned by the UFormattedList and is valid only as long as the UFormattedList is present and unchanged in memory.

You can think of this method as a cast between types.

When calling ufmtval_nextPosition(): The fields are returned from start to end. The special field category UFIELD_CATEGORY_LIST_SPAN is used to indicate which argument was inserted at the given position. The span category will always occur before the corresponding instance of UFIELD_CATEGORY_LIST in the ufmtval_nextPosition() iterator.

Parameters

  uresult | The object containing the formatted string.
  ec | Set if an error occurs.

Returns
  A UFormattedValue owned by the input object.

Stable:
  ICU 64