/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/**

 * MODULE NOTES:

 * @update  gess7/30/98

 *

 * Much as I hate to do it, we were using string compares wrong.

 * Often, programmers call functions like strcmp(s1,s2), and pass

 * one or more null strings. Rather than blow up on these, I've

 * added quick checks to ensure that cases like this don't cause

 * us to fail.

 *

 * In general, if you pass a null into any of these string compare

 * routines, we simply return 0.

 */

#include "nsCRT.h"

#include "nsDebug.h"

//----------------------------------------------------------------------

////////////////////////////////////////////////////////////////////////////////

// My lovely strtok routine

#define IS_DELIM(m, c)          ((m)[(c) >> 3] & (1 << ((c) & 7)))

#define SET_DELIM(m, c)         ((m)[(c) >> 3] |= (1 << ((c) & 7)))

#define DELIM_TABLE_SIZE        32

char*

nsCRT::strtok(char* aString, const char* aDelims, char** aNewStr)

{

  NS_ASSERTION(aString,

               "Unlike regular strtok, the first argument cannot be null.");

  char delimTable[DELIM_TABLE_SIZE];

  uint32_t i;

  char* result;

  char* str = aString;

  for (i = 0; i < DELIM_TABLE_SIZE; ++i) {

    delimTable[i] = '\0';

  }

  for (i = 0; aDelims[i]; i++) {

    SET_DELIM(delimTable, static_cast<uint8_t>(aDelims[i]));

  }

  NS_ASSERTION(aDelims[i] == '\0', "too many delimiters");

  // skip to beginning

  while (*str && IS_DELIM(delimTable, static_cast<uint8_t>(*str))) {

    str++;

  }

  result = str;

  // fix up the end of the token

  while (*str) {

    if (IS_DELIM(delimTable, static_cast<uint8_t>(*str))) {

      *str++ = '\0';

      break;

    }

    str++;

  }

  *aNewStr = str;

  return str == result ? nullptr : result;

}

////////////////////////////////////////////////////////////////////////////////

/**

 * Compare unichar string ptrs, stopping at the 1st null

 * NOTE: If both are null, we return 0.

 * NOTE: We terminate the search upon encountering a nullptr

 *

 * @update  gess 11/10/99

 * @param   s1 and s2 both point to unichar strings

 * @return  0 if they match, -1 if s1<s2; 1 if s1>s2

 */

int32_t

nsCRT::strcmp(const char16_t* aStr1, const char16_t* aStr2)

{

  if (aStr1 && aStr2) {

    for (;;) {

      char16_t c1 = *aStr1++;

      char16_t c2 = *aStr2++;

      if (c1 != c2) {

        if (c1 < c2) {

          return -1;

        }

        return 1;

      }

      if (c1 == 0 || c2 == 0) {

        break;

      }

    }

  } else {

    if (aStr1) {  // aStr2 must have been null

      return -1;

    }

    if (aStr2) {  // aStr1 must have been null

      return 1;

    }

  }

  return 0;

}

// This should use NSPR but NSPR isn't exporting its PR_strtoll function

// Until then...

int64_t

nsCRT::atoll(const char* aStr)

{

  if (!aStr) {

    return 0;

  }

  int64_t ll = 0;

  while (*aStr && *aStr >= '0' && *aStr <= '9') {

    ll *= 10;

    ll += *aStr - '0';

    aStr++;

  }

  return ll;

}