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/*
 *******************************************************************************
 *
 *   © 2016 and later: Unicode, Inc. and others.
 *   License & terms of use: http://www.unicode.org/copyright.html#License
 *
 *******************************************************************************
 *******************************************************************************
 *
 *   Copyright (C) 2001-2005, International Business Machines
 *   Corporation and others.  All Rights Reserved.
 *
 *******************************************************************************
 *   file name:  oldcol.cpp
 *   encoding:   UTF-8
 *   tab size:   8 (not used)
 *   indentation:4
 *
 *   created on: 2001jul24
 *   created by: Vladimir Weinstein
 */

/******************************************************************************
 * This is the module that uses old collation
 ******************************************************************************/

#include <stdio.h>
#include <stdlib.h>
#include <unicode/putil.h>
#include <unicode/ucol.h>

// Very simple example code - sticks a sortkey in the buffer
// Not much error checking
int32_t getSortKey_legacy(const char *locale, const UChar *string, int32_t sLen, uint8_t *buffer, int32_t bLen) {
  UErrorCode status = U_ZERO_ERROR;
  UCollator *coll = ucol_open(locale, &status);
  if(U_FAILURE(status)) {
    return -1;
  }
  int32_t result = ucol_getSortKey(coll, string, sLen, buffer, bLen);
  ucol_close(coll);
  return result;  
}

// This one can be used for passing to qsort function
// Not thread safe or anything
static UCollator *compareCollator = NULL;

int compare_legacy(const void *string1, const void *string2) {
  if(compareCollator != NULL) {
    UCollationResult res = ucol_strcoll(compareCollator, (UChar *) string1, -1, (UChar *) string2, -1);
    if(res == UCOL_LESS) {
      return -1;
    } else if(res == UCOL_GREATER) {
      return 1;
    } else {
      return 0;
    }
  } else {
    return 0;
  }
}

void initCollator_legacy(const char *locale) {
  UErrorCode status = U_ZERO_ERROR;
  compareCollator = ucol_open(locale, &status);
  
  if(U_FAILURE(status))
  {
    fprintf(stderr, "initCollator_legacy(%s): error opening collator, %s!\n", locale, u_errorName(status));
    fprintf(stderr, "Note: ICU data directory is %s\n", u_getDataDirectory());
    fprintf(stderr, "Read the README!\n");
    exit(0);
  }
}

void closeCollator_legacy(void) {
  if(compareCollator != NULL)
  {
    ucol_close(compareCollator);
  }
  else
  {
    fprintf(stderr, "closeCollator_legacy(): collator was already NULL!\n");
  }
  compareCollator = NULL;
}


extern "C" void test_legacy(UChar data[][5], uint32_t size, uint32_t maxlen, uint8_t keys[4][32]) {
  uint32_t i = 0;
  int32_t keySize = 0;

  UVersionInfo uvi;

  u_getVersion(uvi);
  fprintf(stderr, "Entered legacy, version: [%d.%d.%d.%d]\nMoving to sortkeys\n", uvi[0], uvi[1], uvi[2], uvi[3]);

  for(i = 0; i<size; i++) {
    keySize = getSortKey_legacy("ja", data[i], -1, keys[i], 32);
    fprintf(stderr, "For i=%d, size of sortkey is %d\n", i, keySize);
  }

  fprintf(stderr, "Done sortkeys, doing qsort test\n");

  initCollator_legacy("ja");
  qsort(data, size, maxlen*sizeof(UChar), compare_legacy);
  closeCollator_legacy();

  fprintf(stderr, "Done legacy!\n");
}