275 lines
8.2 KiB
C++
275 lines
8.2 KiB
C++
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// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*******************************************************************************
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*
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* Copyright (C) 2003-2014, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: usprep.h
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* encoding: UTF-8
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2003jul2
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* created by: Ram Viswanadha
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*/
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#ifndef __USPREP_H__
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#define __USPREP_H__
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/**
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* \file
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* \brief C API: Implements the StringPrep algorithm.
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*/
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#include "unicode/utypes.h"
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#if U_SHOW_CPLUSPLUS_API
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#include "unicode/localpointer.h"
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#endif // U_SHOW_CPLUSPLUS_API
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/**
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*
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* StringPrep API implements the StingPrep framework as described by RFC 3454.
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* StringPrep prepares Unicode strings for use in network protocols.
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* Profiles of StingPrep are set of rules and data according to with the
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* Unicode Strings are prepared. Each profiles contains tables which describe
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* how a code point should be treated. The tables are broadly classified into
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* <ul>
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* <li> Unassigned Table: Contains code points that are unassigned
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* in the Unicode Version supported by StringPrep. Currently
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* RFC 3454 supports Unicode 3.2. </li>
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* <li> Prohibited Table: Contains code points that are prohibited from
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* the output of the StringPrep processing function. </li>
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* <li> Mapping Table: Contains code points that are deleted from the output or case mapped. </li>
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* </ul>
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*
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* The procedure for preparing Unicode strings:
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* <ol>
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* <li> Map: For each character in the input, check if it has a mapping
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* and, if so, replace it with its mapping. </li>
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* <li> Normalize: Possibly normalize the result of step 1 using Unicode
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* normalization. </li>
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* <li> Prohibit: Check for any characters that are not allowed in the
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* output. If any are found, return an error.</li>
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* <li> Check bidi: Possibly check for right-to-left characters, and if
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* any are found, make sure that the whole string satisfies the
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* requirements for bidirectional strings. If the string does not
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* satisfy the requirements for bidirectional strings, return an
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* error. </li>
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* </ol>
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* @author Ram Viswanadha
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*/
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#if !UCONFIG_NO_IDNA
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#include "unicode/parseerr.h"
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/**
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* The StringPrep profile
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* @stable ICU 2.8
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*/
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typedef struct UStringPrepProfile UStringPrepProfile;
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/**
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* Option to prohibit processing of unassigned code points in the input
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*
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* @see usprep_prepare
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* @stable ICU 2.8
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*/
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#define USPREP_DEFAULT 0x0000
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/**
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* Option to allow processing of unassigned code points in the input
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*
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* @see usprep_prepare
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* @stable ICU 2.8
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*/
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#define USPREP_ALLOW_UNASSIGNED 0x0001
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/**
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* enums for the standard stringprep profile types
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* supported by usprep_openByType.
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* @see usprep_openByType
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* @stable ICU 4.2
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*/
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typedef enum UStringPrepProfileType {
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/**
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* RFC3491 Nameprep
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* @stable ICU 4.2
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*/
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USPREP_RFC3491_NAMEPREP,
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/**
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* RFC3530 nfs4_cs_prep
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* @stable ICU 4.2
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*/
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USPREP_RFC3530_NFS4_CS_PREP,
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/**
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* RFC3530 nfs4_cs_prep with case insensitive option
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* @stable ICU 4.2
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*/
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USPREP_RFC3530_NFS4_CS_PREP_CI,
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/**
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* RFC3530 nfs4_cis_prep
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* @stable ICU 4.2
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*/
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USPREP_RFC3530_NFS4_CIS_PREP,
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/**
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* RFC3530 nfs4_mixed_prep for prefix
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* @stable ICU 4.2
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*/
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USPREP_RFC3530_NFS4_MIXED_PREP_PREFIX,
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/**
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* RFC3530 nfs4_mixed_prep for suffix
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* @stable ICU 4.2
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*/
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USPREP_RFC3530_NFS4_MIXED_PREP_SUFFIX,
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/**
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* RFC3722 iSCSI
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* @stable ICU 4.2
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*/
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USPREP_RFC3722_ISCSI,
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/**
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* RFC3920 XMPP Nodeprep
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* @stable ICU 4.2
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*/
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USPREP_RFC3920_NODEPREP,
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/**
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* RFC3920 XMPP Resourceprep
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* @stable ICU 4.2
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*/
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USPREP_RFC3920_RESOURCEPREP,
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/**
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* RFC4011 Policy MIB Stringprep
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* @stable ICU 4.2
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*/
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USPREP_RFC4011_MIB,
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/**
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* RFC4013 SASLprep
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* @stable ICU 4.2
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*/
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USPREP_RFC4013_SASLPREP,
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/**
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* RFC4505 trace
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* @stable ICU 4.2
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*/
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USPREP_RFC4505_TRACE,
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/**
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* RFC4518 LDAP
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* @stable ICU 4.2
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*/
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USPREP_RFC4518_LDAP,
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/**
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* RFC4518 LDAP for case ignore, numeric and stored prefix
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* matching rules
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* @stable ICU 4.2
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*/
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USPREP_RFC4518_LDAP_CI
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} UStringPrepProfileType;
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/**
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* Creates a StringPrep profile from the data file.
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*
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* @param path string containing the full path pointing to the directory
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* where the profile reside followed by the package name
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* e.g. "/usr/resource/my_app/profiles/mydata" on a Unix system.
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* if NULL, ICU default data files will be used.
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* @param fileName name of the profile file to be opened
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* @param status ICU error code in/out parameter. Must not be NULL.
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* Must fulfill U_SUCCESS before the function call.
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* @return Pointer to UStringPrepProfile that is opened. Should be closed by
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* calling usprep_close()
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* @see usprep_close()
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* @stable ICU 2.8
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*/
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U_CAPI UStringPrepProfile* U_EXPORT2
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usprep_open(const char* path,
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const char* fileName,
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UErrorCode* status);
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/**
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* Creates a StringPrep profile for the specified profile type.
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*
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* @param type The profile type
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* @param status ICU error code in/out parameter. Must not be NULL.
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* Must fulfill U_SUCCESS before the function call.
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* @return Pointer to UStringPrepProfile that is opened. Should be closed by
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* calling usprep_close()
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* @see usprep_close()
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* @stable ICU 4.2
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*/
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U_CAPI UStringPrepProfile* U_EXPORT2
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usprep_openByType(UStringPrepProfileType type,
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UErrorCode* status);
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/**
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* Closes the profile
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* @param profile The profile to close
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* @stable ICU 2.8
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*/
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U_CAPI void U_EXPORT2
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usprep_close(UStringPrepProfile* profile);
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#if U_SHOW_CPLUSPLUS_API
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U_NAMESPACE_BEGIN
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/**
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* \class LocalUStringPrepProfilePointer
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* "Smart pointer" class, closes a UStringPrepProfile via usprep_close().
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* For most methods see the LocalPointerBase base class.
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*
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* @see LocalPointerBase
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* @see LocalPointer
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* @stable ICU 4.4
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*/
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U_DEFINE_LOCAL_OPEN_POINTER(LocalUStringPrepProfilePointer, UStringPrepProfile, usprep_close);
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U_NAMESPACE_END
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#endif
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/**
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* Prepare the input buffer for use in applications with the given profile. This operation maps, normalizes(NFKC),
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* checks for prohibited and BiDi characters in the order defined by RFC 3454
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* depending on the options specified in the profile.
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*
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* @param prep The profile to use
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* @param src Pointer to UChar buffer containing the string to prepare
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* @param srcLength Number of characters in the source string
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* @param dest Pointer to the destination buffer to receive the output
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* @param destCapacity The capacity of destination array
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* @param options A bit set of options:
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*
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* - USPREP_DEFAULT Prohibit processing of unassigned code points in the input
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*
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* - USPREP_ALLOW_UNASSIGNED Treat the unassigned code points are in the input
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* as normal Unicode code points.
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*
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* @param parseError Pointer to UParseError struct to receive information on position
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* of error if an error is encountered. Can be NULL.
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* @param status ICU in/out error code parameter.
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* U_INVALID_CHAR_FOUND if src contains
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* unmatched single surrogates.
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* U_INDEX_OUTOFBOUNDS_ERROR if src contains
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* too many code points.
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* U_BUFFER_OVERFLOW_ERROR if destCapacity is not enough
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* @return The number of UChars in the destination buffer
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* @stable ICU 2.8
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*/
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U_CAPI int32_t U_EXPORT2
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usprep_prepare( const UStringPrepProfile* prep,
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const UChar* src, int32_t srcLength,
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UChar* dest, int32_t destCapacity,
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int32_t options,
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UParseError* parseError,
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UErrorCode* status );
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#endif /* #if !UCONFIG_NO_IDNA */
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#endif
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