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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2003-2014, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: uidna.h
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2003feb1
* created by: Ram Viswanadha
*/
#ifndef __UIDNA_H__
#define __UIDNA_H__
#include "unicode/utypes.h"
#if !UCONFIG_NO_IDNA
#include <stdbool.h>
#include "unicode/parseerr.h"
#if U_SHOW_CPLUSPLUS_API
#include "unicode/localpointer.h"
#endif // U_SHOW_CPLUSPLUS_API
/**
* \file
* \brief C API: Internationalizing Domain Names in Applications (IDNA)
*
* IDNA2008 is implemented according to UTS #46, see the IDNA C++ class in idna.h.
*
* The C API functions which do take a UIDNA * service object pointer
* implement UTS #46 and IDNA2008.
*
* IDNA2003 is obsolete.
* The C API functions which do not take a service object pointer
* implement IDNA2003. They are all deprecated.
*/
/*
* IDNA option bit set values.
*/
enum {
/**
* Default options value: None of the other options are set.
* For use in static worker and factory methods.
* @stable ICU 2.6
*/
UIDNA_DEFAULT=0,
#ifndef U_HIDE_DEPRECATED_API
/**
* Option to allow unassigned code points in domain names and labels.
* For use in static worker and factory methods.
* <p>This option is ignored by the UTS46 implementation.
* (UTS #46 disallows unassigned code points.)
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
UIDNA_ALLOW_UNASSIGNED=1,
#endif /* U_HIDE_DEPRECATED_API */
/**
* Option to check whether the input conforms to the STD3 ASCII rules,
* for example the restriction of labels to LDH characters
* (ASCII Letters, Digits and Hyphen-Minus).
* For use in static worker and factory methods.
* @stable ICU 2.6
*/
UIDNA_USE_STD3_RULES=2,
/**
* IDNA option to check for whether the input conforms to the BiDi rules.
* For use in static worker and factory methods.
* <p>This option is ignored by the IDNA2003 implementation.
* (IDNA2003 always performs a BiDi check.)
* @stable ICU 4.6
*/
UIDNA_CHECK_BIDI=4,
/**
* IDNA option to check for whether the input conforms to the CONTEXTJ rules.
* For use in static worker and factory methods.
* <p>This option is ignored by the IDNA2003 implementation.
* (The CONTEXTJ check is new in IDNA2008.)
* @stable ICU 4.6
*/
UIDNA_CHECK_CONTEXTJ=8,
/**
* IDNA option for nontransitional processing in ToASCII().
* For use in static worker and factory methods.
* <p>By default, ToASCII() uses transitional processing.
* <p>This option is ignored by the IDNA2003 implementation.
* (This is only relevant for compatibility of newer IDNA implementations with IDNA2003.)
* @stable ICU 4.6
*/
UIDNA_NONTRANSITIONAL_TO_ASCII=0x10,
/**
* IDNA option for nontransitional processing in ToUnicode().
* For use in static worker and factory methods.
* <p>By default, ToUnicode() uses transitional processing.
* <p>This option is ignored by the IDNA2003 implementation.
* (This is only relevant for compatibility of newer IDNA implementations with IDNA2003.)
* @stable ICU 4.6
*/
UIDNA_NONTRANSITIONAL_TO_UNICODE=0x20,
/**
* IDNA option to check for whether the input conforms to the CONTEXTO rules.
* For use in static worker and factory methods.
* <p>This option is ignored by the IDNA2003 implementation.
* (The CONTEXTO check is new in IDNA2008.)
* <p>This is for use by registries for IDNA2008 conformance.
* UTS #46 does not require the CONTEXTO check.
* @stable ICU 49
*/
UIDNA_CHECK_CONTEXTO=0x40
};
/**
* Opaque C service object type for the new IDNA API.
* @stable ICU 4.6
*/
struct UIDNA;
typedef struct UIDNA UIDNA; /**< C typedef for struct UIDNA. @stable ICU 4.6 */
/**
* Returns a UIDNA instance which implements UTS #46.
* Returns an unmodifiable instance, owned by the caller.
* Cache it for multiple operations, and uidna_close() it when done.
* The instance is thread-safe, that is, it can be used concurrently.
*
* For details about the UTS #46 implementation see the IDNA C++ class in idna.h.
*
* @param options Bit set to modify the processing and error checking.
* See option bit set values in uidna.h.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return the UTS #46 UIDNA instance, if successful
* @stable ICU 4.6
*/
U_CAPI UIDNA * U_EXPORT2
uidna_openUTS46(uint32_t options, UErrorCode *pErrorCode);
/**
* Closes a UIDNA instance.
* @param idna UIDNA instance to be closed
* @stable ICU 4.6
*/
U_CAPI void U_EXPORT2
uidna_close(UIDNA *idna);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUIDNAPointer
* "Smart pointer" class, closes a UIDNA via uidna_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 4.6
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUIDNAPointer, UIDNA, uidna_close);
U_NAMESPACE_END
#endif
/**
* Output container for IDNA processing errors.
* Initialize with UIDNA_INFO_INITIALIZER:
* \code
* UIDNAInfo info = UIDNA_INFO_INITIALIZER;
* int32_t length = uidna_nameToASCII(..., &info, &errorCode);
* if(U_SUCCESS(errorCode) && info.errors!=0) { ... }
* \endcode
* @stable ICU 4.6
*/
typedef struct UIDNAInfo {
/** sizeof(UIDNAInfo) @stable ICU 4.6 */
int16_t size;
/**
* Set to true if transitional and nontransitional processing produce different results.
* For details see C++ IDNAInfo::isTransitionalDifferent().
* @stable ICU 4.6
*/
UBool isTransitionalDifferent;
UBool reservedB3; /**< Reserved field, do not use. @internal */
/**
* Bit set indicating IDNA processing errors. 0 if no errors.
* See UIDNA_ERROR_... constants.
* @stable ICU 4.6
*/
uint32_t errors;
int32_t reservedI2; /**< Reserved field, do not use. @internal */
int32_t reservedI3; /**< Reserved field, do not use. @internal */
} UIDNAInfo;
/**
* Static initializer for a UIDNAInfo struct.
* @stable ICU 4.6
*/
#define UIDNA_INFO_INITIALIZER { \
(int16_t)sizeof(UIDNAInfo), \
false, false, \
0, 0, 0 }
/**
* Converts a single domain name label into its ASCII form for DNS lookup.
* If any processing step fails, then pInfo->errors will be non-zero and
* the result might not be an ASCII string.
* The label might be modified according to the types of errors.
* Labels with severe errors will be left in (or turned into) their Unicode form.
*
* The UErrorCode indicates an error only in exceptional cases,
* such as a U_MEMORY_ALLOCATION_ERROR.
*
* @param idna UIDNA instance
* @param label Input domain name label
* @param length Label length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_labelToASCII(const UIDNA *idna,
const UChar *label, int32_t length,
UChar *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a single domain name label into its Unicode form for human-readable display.
* If any processing step fails, then pInfo->errors will be non-zero.
* The label might be modified according to the types of errors.
*
* The UErrorCode indicates an error only in exceptional cases,
* such as a U_MEMORY_ALLOCATION_ERROR.
*
* @param idna UIDNA instance
* @param label Input domain name label
* @param length Label length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_labelToUnicode(const UIDNA *idna,
const UChar *label, int32_t length,
UChar *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a whole domain name into its ASCII form for DNS lookup.
* If any processing step fails, then pInfo->errors will be non-zero and
* the result might not be an ASCII string.
* The domain name might be modified according to the types of errors.
* Labels with severe errors will be left in (or turned into) their Unicode form.
*
* The UErrorCode indicates an error only in exceptional cases,
* such as a U_MEMORY_ALLOCATION_ERROR.
*
* @param idna UIDNA instance
* @param name Input domain name
* @param length Domain name length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_nameToASCII(const UIDNA *idna,
const UChar *name, int32_t length,
UChar *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a whole domain name into its Unicode form for human-readable display.
* If any processing step fails, then pInfo->errors will be non-zero.
* The domain name might be modified according to the types of errors.
*
* The UErrorCode indicates an error only in exceptional cases,
* such as a U_MEMORY_ALLOCATION_ERROR.
*
* @param idna UIDNA instance
* @param name Input domain name
* @param length Domain name length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_nameToUnicode(const UIDNA *idna,
const UChar *name, int32_t length,
UChar *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/* UTF-8 versions of the processing methods --------------------------------- */
/**
* Converts a single domain name label into its ASCII form for DNS lookup.
* UTF-8 version of uidna_labelToASCII(), same behavior.
*
* @param idna UIDNA instance
* @param label Input domain name label
* @param length Label length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_labelToASCII_UTF8(const UIDNA *idna,
const char *label, int32_t length,
char *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a single domain name label into its Unicode form for human-readable display.
* UTF-8 version of uidna_labelToUnicode(), same behavior.
*
* @param idna UIDNA instance
* @param label Input domain name label
* @param length Label length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_labelToUnicodeUTF8(const UIDNA *idna,
const char *label, int32_t length,
char *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a whole domain name into its ASCII form for DNS lookup.
* UTF-8 version of uidna_nameToASCII(), same behavior.
*
* @param idna UIDNA instance
* @param name Input domain name
* @param length Domain name length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_nameToASCII_UTF8(const UIDNA *idna,
const char *name, int32_t length,
char *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/**
* Converts a whole domain name into its Unicode form for human-readable display.
* UTF-8 version of uidna_nameToUnicode(), same behavior.
*
* @param idna UIDNA instance
* @param name Input domain name
* @param length Domain name length, or -1 if NUL-terminated
* @param dest Destination string buffer
* @param capacity Destination buffer capacity
* @param pInfo Output container of IDNA processing details.
* @param pErrorCode Standard ICU error code. Its input value must
* pass the U_SUCCESS() test, or else the function returns
* immediately. Check for U_FAILURE() on output or use with
* function chaining. (See User Guide for details.)
* @return destination string length
* @stable ICU 4.6
*/
U_CAPI int32_t U_EXPORT2
uidna_nameToUnicodeUTF8(const UIDNA *idna,
const char *name, int32_t length,
char *dest, int32_t capacity,
UIDNAInfo *pInfo, UErrorCode *pErrorCode);
/*
* IDNA error bit set values.
* When a domain name or label fails a processing step or does not meet the
* validity criteria, then one or more of these error bits are set.
*/
enum {
/**
* A non-final domain name label (or the whole domain name) is empty.
* @stable ICU 4.6
*/
UIDNA_ERROR_EMPTY_LABEL=1,
/**
* A domain name label is longer than 63 bytes.
* (See STD13/RFC1034 3.1. Name space specifications and terminology.)
* This is only checked in ToASCII operations, and only if the output label is all-ASCII.
* @stable ICU 4.6
*/
UIDNA_ERROR_LABEL_TOO_LONG=2,
/**
* A domain name is longer than 255 bytes in its storage form.
* (See STD13/RFC1034 3.1. Name space specifications and terminology.)
* This is only checked in ToASCII operations, and only if the output domain name is all-ASCII.
* @stable ICU 4.6
*/
UIDNA_ERROR_DOMAIN_NAME_TOO_LONG=4,
/**
* A label starts with a hyphen-minus ('-').
* @stable ICU 4.6
*/
UIDNA_ERROR_LEADING_HYPHEN=8,
/**
* A label ends with a hyphen-minus ('-').
* @stable ICU 4.6
*/
UIDNA_ERROR_TRAILING_HYPHEN=0x10,
/**
* A label contains hyphen-minus ('-') in the third and fourth positions.
* @stable ICU 4.6
*/
UIDNA_ERROR_HYPHEN_3_4=0x20,
/**
* A label starts with a combining mark.
* @stable ICU 4.6
*/
UIDNA_ERROR_LEADING_COMBINING_MARK=0x40,
/**
* A label or domain name contains disallowed characters.
* @stable ICU 4.6
*/
UIDNA_ERROR_DISALLOWED=0x80,
/**
* A label starts with "xn--" but does not contain valid Punycode.
* That is, an xn-- label failed Punycode decoding.
* @stable ICU 4.6
*/
UIDNA_ERROR_PUNYCODE=0x100,
/**
* A label contains a dot=full stop.
* This can occur in an input string for a single-label function.
* @stable ICU 4.6
*/
UIDNA_ERROR_LABEL_HAS_DOT=0x200,
/**
* An ACE label does not contain a valid label string.
* The label was successfully ACE (Punycode) decoded but the resulting
* string had severe validation errors. For example,
* it might contain characters that are not allowed in ACE labels,
* or it might not be normalized.
* @stable ICU 4.6
*/
UIDNA_ERROR_INVALID_ACE_LABEL=0x400,
/**
* A label does not meet the IDNA BiDi requirements (for right-to-left characters).
* @stable ICU 4.6
*/
UIDNA_ERROR_BIDI=0x800,
/**
* A label does not meet the IDNA CONTEXTJ requirements.
* @stable ICU 4.6
*/
UIDNA_ERROR_CONTEXTJ=0x1000,
/**
* A label does not meet the IDNA CONTEXTO requirements for punctuation characters.
* Some punctuation characters "Would otherwise have been DISALLOWED"
* but are allowed in certain contexts. (RFC 5892)
* @stable ICU 49
*/
UIDNA_ERROR_CONTEXTO_PUNCTUATION=0x2000,
/**
* A label does not meet the IDNA CONTEXTO requirements for digits.
* Arabic-Indic Digits (U+066x) must not be mixed with Extended Arabic-Indic Digits (U+06Fx).
* @stable ICU 49
*/
UIDNA_ERROR_CONTEXTO_DIGITS=0x4000
};
#ifndef U_HIDE_DEPRECATED_API
/* IDNA2003 API ------------------------------------------------------------- */
/**
* IDNA2003: This function implements the ToASCII operation as defined in the IDNA RFC.
* This operation is done on <b>single labels</b> before sending it to something that expects
* ASCII names. A label is an individual part of a domain name. Labels are usually
* separated by dots; e.g. "www.example.com" is composed of 3 labels "www","example", and "com".
*
* IDNA2003 API Overview:
*
* The uidna_ API implements the IDNA protocol as defined in the IDNA RFC
* (http://www.ietf.org/rfc/rfc3490.txt).
* The RFC defines 2 operations: ToASCII and ToUnicode. Domain name labels
* containing non-ASCII code points are processed by the
* ToASCII operation before passing it to resolver libraries. Domain names
* that are obtained from resolver libraries are processed by the
* ToUnicode operation before displaying the domain name to the user.
* IDNA requires that implementations process input strings with Nameprep
* (http://www.ietf.org/rfc/rfc3491.txt),
* which is a profile of Stringprep (http://www.ietf.org/rfc/rfc3454.txt),
* and then with Punycode (http://www.ietf.org/rfc/rfc3492.txt).
* Implementations of IDNA MUST fully implement Nameprep and Punycode;
* neither Nameprep nor Punycode are optional.
* The input and output of ToASCII and ToUnicode operations are Unicode
* and are designed to be chainable, i.e., applying ToASCII or ToUnicode operations
* multiple times to an input string will yield the same result as applying the operation
* once.
* ToUnicode(ToUnicode(ToUnicode...(ToUnicode(string)))) == ToUnicode(string)
* ToASCII(ToASCII(ToASCII...(ToASCII(string))) == ToASCII(string).
*
* @param src Input UChar array containing label in Unicode.
* @param srcLength Number of UChars in src, or -1 if NUL-terminated.
* @param dest Output UChar array with ASCII (ACE encoded) label.
* @param destCapacity Size of dest.
* @param options A bit set of options:
*
* - UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points
* and do not use STD3 ASCII rules
* If unassigned code points are found the operation fails with
* U_UNASSIGNED_ERROR error code.
*
* - UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations
* If this option is set, the unassigned code points are in the input
* are treated as normal Unicode code points.
*
* - UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions
* If this option is set and the input does not satisfy STD3 rules,
* the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR
*
* @param parseError Pointer to UParseError struct to receive information on position
* of error if an error is encountered. Can be NULL.
* @param status ICU in/out error code parameter.
* U_INVALID_CHAR_FOUND if src contains
* unmatched single surrogates.
* U_INDEX_OUTOFBOUNDS_ERROR if src contains
* too many code points.
* U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough
* @return The length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
U_DEPRECATED int32_t U_EXPORT2
uidna_toASCII(const UChar* src, int32_t srcLength,
UChar* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status);
/**
* IDNA2003: This function implements the ToUnicode operation as defined in the IDNA RFC.
* This operation is done on <b>single labels</b> before sending it to something that expects
* Unicode names. A label is an individual part of a domain name. Labels are usually
* separated by dots; for e.g. "www.example.com" is composed of 3 labels "www","example", and "com".
*
* @param src Input UChar array containing ASCII (ACE encoded) label.
* @param srcLength Number of UChars in src, or -1 if NUL-terminated.
* @param dest Output Converted UChar array containing Unicode equivalent of label.
* @param destCapacity Size of dest.
* @param options A bit set of options:
*
* - UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points
* and do not use STD3 ASCII rules
* If unassigned code points are found the operation fails with
* U_UNASSIGNED_ERROR error code.
*
* - UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations
* If this option is set, the unassigned code points are in the input
* are treated as normal Unicode code points. <b> Note: </b> This option is
* required on toUnicode operation because the RFC mandates
* verification of decoded ACE input by applying toASCII and comparing
* its output with source
*
* - UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions
* If this option is set and the input does not satisfy STD3 rules,
* the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR
*
* @param parseError Pointer to UParseError struct to receive information on position
* of error if an error is encountered. Can be NULL.
* @param status ICU in/out error code parameter.
* U_INVALID_CHAR_FOUND if src contains
* unmatched single surrogates.
* U_INDEX_OUTOFBOUNDS_ERROR if src contains
* too many code points.
* U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough
* @return The length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
U_DEPRECATED int32_t U_EXPORT2
uidna_toUnicode(const UChar* src, int32_t srcLength,
UChar* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status);
/**
* IDNA2003: Convenience function that implements the IDNToASCII operation as defined in the IDNA RFC.
* This operation is done on complete domain names, e.g: "www.example.com".
* It is important to note that this operation can fail. If it fails, then the input
* domain name cannot be used as an Internationalized Domain Name and the application
* should have methods defined to deal with the failure.
*
* <b>Note:</b> IDNA RFC specifies that a conformant application should divide a domain name
* into separate labels, decide whether to apply allowUnassigned and useSTD3ASCIIRules on each,
* and then convert. This function does not offer that level of granularity. The options once
* set will apply to all labels in the domain name
*
* @param src Input UChar array containing IDN in Unicode.
* @param srcLength Number of UChars in src, or -1 if NUL-terminated.
* @param dest Output UChar array with ASCII (ACE encoded) IDN.
* @param destCapacity Size of dest.
* @param options A bit set of options:
*
* - UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points
* and do not use STD3 ASCII rules
* If unassigned code points are found the operation fails with
* U_UNASSIGNED_CODE_POINT_FOUND error code.
*
* - UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations
* If this option is set, the unassigned code points are in the input
* are treated as normal Unicode code points.
*
* - UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions
* If this option is set and the input does not satisfy STD3 rules,
* the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR
*
* @param parseError Pointer to UParseError struct to receive information on position
* of error if an error is encountered. Can be NULL.
* @param status ICU in/out error code parameter.
* U_INVALID_CHAR_FOUND if src contains
* unmatched single surrogates.
* U_INDEX_OUTOFBOUNDS_ERROR if src contains
* too many code points.
* U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough
* @return The length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
U_DEPRECATED int32_t U_EXPORT2
uidna_IDNToASCII( const UChar* src, int32_t srcLength,
UChar* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status);
/**
* IDNA2003: Convenience function that implements the IDNToUnicode operation as defined in the IDNA RFC.
* This operation is done on complete domain names, e.g: "www.example.com".
*
* <b>Note:</b> IDNA RFC specifies that a conformant application should divide a domain name
* into separate labels, decide whether to apply allowUnassigned and useSTD3ASCIIRules on each,
* and then convert. This function does not offer that level of granularity. The options once
* set will apply to all labels in the domain name
*
* @param src Input UChar array containing IDN in ASCII (ACE encoded) form.
* @param srcLength Number of UChars in src, or -1 if NUL-terminated.
* @param dest Output UChar array containing Unicode equivalent of source IDN.
* @param destCapacity Size of dest.
* @param options A bit set of options:
*
* - UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points
* and do not use STD3 ASCII rules
* If unassigned code points are found the operation fails with
* U_UNASSIGNED_CODE_POINT_FOUND error code.
*
* - UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations
* If this option is set, the unassigned code points are in the input
* are treated as normal Unicode code points.
*
* - UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions
* If this option is set and the input does not satisfy STD3 rules,
* the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR
*
* @param parseError Pointer to UParseError struct to receive information on position
* of error if an error is encountered. Can be NULL.
* @param status ICU in/out error code parameter.
* U_INVALID_CHAR_FOUND if src contains
* unmatched single surrogates.
* U_INDEX_OUTOFBOUNDS_ERROR if src contains
* too many code points.
* U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough
* @return The length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
U_DEPRECATED int32_t U_EXPORT2
uidna_IDNToUnicode( const UChar* src, int32_t srcLength,
UChar* dest, int32_t destCapacity,
int32_t options,
UParseError* parseError,
UErrorCode* status);
/**
* IDNA2003: Compare two IDN strings for equivalence.
* This function splits the domain names into labels and compares them.
* According to IDN RFC, whenever two labels are compared, they are
* considered equal if and only if their ASCII forms (obtained by
* applying toASCII) match using an case-insensitive ASCII comparison.
* Two domain names are considered a match if and only if all labels
* match regardless of whether label separators match.
*
* @param s1 First source string.
* @param length1 Length of first source string, or -1 if NUL-terminated.
*
* @param s2 Second source string.
* @param length2 Length of second source string, or -1 if NUL-terminated.
* @param options A bit set of options:
*
* - UIDNA_DEFAULT Use default options, i.e., do not process unassigned code points
* and do not use STD3 ASCII rules
* If unassigned code points are found the operation fails with
* U_UNASSIGNED_CODE_POINT_FOUND error code.
*
* - UIDNA_ALLOW_UNASSIGNED Unassigned values can be converted to ASCII for query operations
* If this option is set, the unassigned code points are in the input
* are treated as normal Unicode code points.
*
* - UIDNA_USE_STD3_RULES Use STD3 ASCII rules for host name syntax restrictions
* If this option is set and the input does not satisfy STD3 rules,
* the operation will fail with U_IDNA_STD3_ASCII_RULES_ERROR
*
* @param status ICU error code in/out parameter.
* Must fulfill U_SUCCESS before the function call.
* @return <0 or 0 or >0 as usual for string comparisons
* @deprecated ICU 55 Use UTS #46 instead via uidna_openUTS46() or class IDNA.
*/
U_DEPRECATED int32_t U_EXPORT2
uidna_compare( const UChar *s1, int32_t length1,
const UChar *s2, int32_t length2,
int32_t options,
UErrorCode* status);
#endif /* U_HIDE_DEPRECATED_API */
#endif /* #if !UCONFIG_NO_IDNA */
#endif
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