157 lines
5.5 KiB
C
157 lines
5.5 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2003-2006, 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: US-ASCII
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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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/**
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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 classied into
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* <ul>
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* <li> Unassinged 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 prohibted from
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* the output of the StringPrep processing function. </li>
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* <li> Mapping Table: Contains code ponts 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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* 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_STABLE 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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* 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_STABLE void U_EXPORT2
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usprep_close(UStringPrepProfile* profile);
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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 prohited 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_NONE 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_STABLE 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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