/*
 *******************************************************************************
 *
 *   Copyright (C) 2003, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  sprpimpl.h
 *   encoding:   US-ASCII
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 2003feb1
 *   created by: Ram Viswanadha
 */

#ifndef SPRPIMPL_H
#define SPRPIMPL_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_IDNA

#include "unicode/ustring.h"
#include "unicode/parseerr.h"
#include "unicode/usprep.h"
#include "unicode/udata.h"
#include "utrie.h"
#include "udataswp.h"

#define _SPREP_DATA_TYPE "spp"

enum UStringPrepType{
    USPREP_UNASSIGNED           = 0x0000 ,
    USPREP_MAP                  = 0x0001 ,
    USPREP_PROHIBITED           = 0x0002 , 
    USPREP_DELETE               = 0x0003 ,
    USPREP_TYPE_LIMIT           = 0x0004  
};

typedef enum UStringPrepType UStringPrepType;

#ifdef USPREP_TYPE_NAMES_ARRAY
static const char* usprepTypeNames[] ={
    "UNASSIGNED" ,          
    "MAP" , 
    "PROHIBITED" ,        
    "DELETE",
    "TYPE_LIMIT" 
};
#endif

enum{
    _SPREP_NORMALIZATION_ON = 0x0001,
    _SPREP_CHECK_BIDI_ON    = 0x0002
};

enum{
    _SPREP_TYPE_THRESHOLD       = 0xFFF0,
    _SPREP_MAX_INDEX_VALUE      = 0x3FBF,   /*16139*/ 
    _SPREP_MAX_INDEX_TOP_LENGTH = 0x0003
};

/* indexes[] value names */
enum {
    _SPREP_INDEX_TRIE_SIZE                  = 0, /* number of bytes in StringPrep trie */
    _SPREP_INDEX_MAPPING_DATA_SIZE          = 1, /* The array that contains the mapping   */
    _SPREP_NORM_CORRECTNS_LAST_UNI_VERSION  = 2, /* The index of Unicode version of last entry in NormalizationCorrections.txt */ 
    _SPREP_ONE_UCHAR_MAPPING_INDEX_START    = 3, /* The starting index of 1 UChar mapping index in the mapping data array */
    _SPREP_TWO_UCHARS_MAPPING_INDEX_START   = 4, /* The starting index of 2 UChars mapping index in the mapping data array */
    _SPREP_THREE_UCHARS_MAPPING_INDEX_START = 5, /* The starting index of 3 UChars mapping index in the mapping data array */
    _SPREP_FOUR_UCHARS_MAPPING_INDEX_START  = 6, /* The starting index of 4 UChars mapping index in the mapping data array */
    _SPREP_OPTIONS                          = 7, /* Bit set of options to turn on in the profile */
    _SPREP_INDEX_TOP=16                          /* changing this requires a new formatVersion */
};

typedef struct UStringPrepKey UStringPrepKey;


struct UStringPrepKey{
    char* name;
    char* path;
};

struct UStringPrepProfile{
    int32_t indexes[_SPREP_INDEX_TOP];
    UTrie sprepTrie;
    const uint16_t* mappingData;
    UDataMemory* sprepData;
    UBool isDataLoaded;
    int32_t refCount;
    UBool doNFKC;
    UBool checkBiDi;
};

/**
 * Helper function for populating the UParseError struct
 * @internal
 */
U_CAPI void U_EXPORT2
uprv_syntaxError(const UChar* rules, 
                 int32_t pos,
                 int32_t rulesLen,
                 UParseError* parseError);


/**
 * Map every character in input stream with mapping character 
 * in the mapping table and populate the output stream.
 * For any individual character the mapping table may specify 
 * that that a character be mapped to nothing, mapped to one 
 * other character or to a string of other characters.
 *
 * @param prep          Profile to use 
 * @param src           Pointer to UChar buffer containing a single label
 * @param srcLength     Number of characters in the source label
 * @param dest          Pointer to the destination buffer to receive the output
 * @param destCapacity  The capacity of destination array
 * @param options
 * @param parseError
 * @param status        ICU error code in/out parameter.
 *                      Must fulfill U_SUCCESS before the function call.
 * @return The number of UChars in the destination buffer
 */
U_CFUNC int32_t
usprep_map(  UStringPrepProfile* prep, 
             const UChar* src, int32_t srcLength, 
             UChar* dest, int32_t destCapacity,
             int32_t options,
             UParseError* parseError,
             UErrorCode* status );


/**
 * Normalize the input stream using Normalization Form KC (NFKC)
 *
 * @param prep          Profile to use 
 * @param src           Pointer to UChar buffer containing a single label
 * @param srcLength     Number of characters in the source label
 * @param dest          Pointer to the destination buffer to receive the output
 * @param destCapacity  The capacity of destination array
 * @param status        ICU error code in/out parameter.
 *                      Must fulfill U_SUCCESS before the function call.
 * @return The number of UChars in the destination buffer
 */
U_CFUNC int32_t 
usprep_normalize(   UStringPrepProfile* prep,
                    const UChar* src, int32_t srcLength, 
                    UChar* dest, int32_t destCapacity,
                    UErrorCode* status );

/**
 * Swap StringPrep .spp profile data. See udataswp.h.
 * @internal
 */
U_CAPI int32_t U_EXPORT2
usprep_swap(const UDataSwapper *ds,
            const void *inData, int32_t length, void *outData,
            UErrorCode *pErrorCode);

#endif /* #if !UCONFIG_NO_IDNA */

#endif

/*
 * Hey, Emacs, please set the following:
 *
 * Local Variables:
 * indent-tabs-mode: nil
 * End:
 *
 */