ICU 65.1 65.1

Namespaces | Typedefs | Enumerations | Functions
ulistformatter.h File Reference

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

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

Go to the source code of this file.

## Namespaces
| icu
| File coll.h.

## Typedefs
typedef struct UListFormatter | UListFormatter
| C typedef for struct UListFormatter. More...
typedef struct UFormattedList | UFormattedList
| Opaque struct to contain the results of a UListFormatter operation. More...
typedef enum UListFormatterField | UListFormatterField
| FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter. More...

## Enumerations
enum | UListFormatterField { ULISTFMT_LITERAL_FIELD, ULISTFMT_ELEMENT_FIELD }
| FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter. More...

## Functions
U_CAPI UListFormatter * | ulistfmt_open (const char *locale, UErrorCode *status)
| Open a new UListFormatter object using the rules for a given locale. More...
U_CAPI void | ulistfmt_close (UListFormatter *listfmt)
| Close a UListFormatter object. More...
U_CAPI UFormattedList * | ulistfmt_openResult (UErrorCode *ec)
| Creates an object to hold the result of a UListFormatter operation. More...
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. More...
U_CAPI void | ulistfmt_closeResult (UFormattedList *uresult)
| Releases the UFormattedList created by ulistfmt_openResult(). More...
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. More...
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(). More...

## 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.

Draft:
  This API may be changed in the future versions and was introduced in ICU 64

Definition at line 43 of file ulistformatter.h.

## ◆ UListFormatter

typedef struct UListFormatter UListFormatter

C typedef for struct UListFormatter.

Stable:
  ICU 55

Definition at line 35 of file ulistformatter.h.

## ◆ UListFormatterField

typedef enum UListFormatterField UListFormatterField

FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter.

Draft:
  This API may be changed in the future versions and was introduced in ICU 63

## Enumeration Type Documentation

## ◆ UListFormatterField

enum UListFormatterField

FieldPosition and UFieldPosition selectors for format fields defined by ListFormatter.

Draft:
  This API may be changed in the future versions and was introduced in ICU 63

Enumerator
ULISTFMT_LITERAL_FIELD | The literal text in the result which came from the resources. Draft: This API may be changed in the future versions and was introduced in ICU 63
ULISTFMT_ELEMENT_FIELD | The element text in the result which came from the input strings. Draft: This API may be changed in the future versions and was introduced in ICU 63

Definition at line 52 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.

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

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

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_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.

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

Draft:
  This API may be changed in the future versions and was introduced in ICU 64