/* ******************************************************************************* * * Copyright (C) 2003-2004, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: uidna.h * encoding: US-ASCII * 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 "unicode/parseerr.h" /** *\file * 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 labels * containing non-ASCII code points are required to be processed by * ToASCII operation before passing it to resolver libraries. Domain names * that are obtained from resolver libraries are required to be processed by * 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). * */ #ifndef U_HIDE_DRAFT_API /** * Option to prohibit processing of unassigned codepoints in the input and * do not check if the input conforms to STD-3 ASCII rules. * * @see uidna_toASCII uidna_toUnicode * @stable ICU 2.6 */ #define UIDNA_DEFAULT 0x0000 /** * Option to allow processing of unassigned codepoints in the input * * @see uidna_toASCII uidna_toUnicode * @stable ICU 2.6 */ #define UIDNA_ALLOW_UNASSIGNED 0x0001 /** * Option to check if input conforms to STD-3 ASCII rules * * @see uidna_toASCII uidna_toUnicode * @stable ICU 2.6 */ #define UIDNA_USE_STD3_RULES 0x0002 #endif /*U_HIDE_DRAFT_API*/ /** * 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". * * * @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 Number of ASCII characters converted. * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 uidna_toASCII(const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status); /** * 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 Number of Unicode characters converted. * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 uidna_toUnicode(const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status); /** * 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 Number of ASCII characters converted. * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 uidna_IDNToASCII( const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status); /** * 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 Number of ASCII characters converted. * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 uidna_IDNToUnicode( const UChar* src, int32_t srcLength, UChar* dest, int32_t destCapacity, int32_t options, UParseError* parseError, UErrorCode* status); /** * 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 * @stable ICU 2.6 */ U_STABLE int32_t U_EXPORT2 uidna_compare( const UChar *s1, int32_t length1, const UChar *s2, int32_t length2, int32_t options, UErrorCode* status); #endif /* #if !UCONFIG_NO_IDNA */ #endif