/*

* Copyright (c) 2003 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  

*

*/

/*

**-------------------------------------------------------------------------

**  Component Generic Include

**-------------------------------------------------------------------------

*/

#include "nwx_mem.h"

#include "nwx_string.h"

#include "nwx_url_utils.h"

/*

**-------------------------------------------------------------------------

**  Module Specific Includes

**-------------------------------------------------------------------------

*/

#include "nw_nvpair.h"

#include "BrsrStatusCodes.h"

/*

**-------------------------------------------------------------------------

**  Constants

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  Internal Types

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  Macros

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  Internal Prototypes

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  File Scoped Static Variables

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  Global Variable Definitions

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  Internal Functions

**-------------------------------------------------------------------------

*/

/*

**-------------------------------------------------------------------------

**  External Public (Exported) Functions

**-------------------------------------------------------------------------

*/

/* WMLScript Spec 6.1.6 Identifiers */

NW_Bool NW_CheckName(const NW_Ucs2* name)

{

  const NW_Ucs2 *pChar = name;

  NW_ASSERT(name != NULL);

  if (!NW_Str_Isalpha(*name) && (*name != WAE_URL_UNDER_CHAR))

  {

    return NW_FALSE;

  }

  while (*pChar != 0) {

    if (!NW_Str_Isalnum(*pChar) && (*pChar != WAE_URL_UNDER_CHAR))

    {

      return NW_FALSE;

    } else {

      pChar++;

    }

  }

  return NW_TRUE;

}

NW_NVPair_t*  NW_NVPair_New (void)

{

  NW_NVPair_t* thisObj;

  thisObj = (NW_NVPair_t*) NW_Mem_Malloc( sizeof(NW_NVPair_t) );

  if ( thisObj != NULL) {

    NW_Mem_memset( thisObj, 0, sizeof(NW_NVPair_t) );

  }

  return thisObj;

}

void NW_NVPair_Delete (NW_NVPair_t* thisObj)

{

  if ( thisObj == NULL ) {

    return;

  }

  if ( thisObj->strTable != NULL ) {

    NW_Mem_Free( thisObj->strTable );

    thisObj->strTable = NULL;

  }

  NW_Mem_Free( thisObj );

}

NW_Bool NW_NVPair_IsEmpty (NW_NVPair_t* thisObj)

{

  return NW_BOOL_CAST(( thisObj == NULL ) || ( thisObj->size == 0 ));

}

TBrowserStatusCode NW_NVPair_CalSize (NW_NVPair_t* thisObj, 

                               const NW_Ucs2* name,

                               const NW_Ucs2* value)

{

  NW_Uint32 len;

  NW_ASSERT( thisObj != NULL );

  NW_ASSERT( thisObj->iterPtr == NULL );

  NW_ASSERT( thisObj->strTable == NULL );

  NW_ASSERT( name != NULL ); 

      return KBrsrSuccess;

  }

  thisObj->size = thisObj->size + NW_Str_Strlen( name ) + 1;

  /* Treat NULL pointer as an empty string (""). */

  len = ( value == NULL ) ? 1 : (NW_Str_Strlen(value) + 1);

  thisObj->size = thisObj->size + len;

  return KBrsrSuccess;

}

TBrowserStatusCode NW_NVPair_AllocStorage (NW_NVPair_t* thisObj)

{

  NW_Ucs2* storage;

  NW_Uint32 byteCnt;

  NW_ASSERT( thisObj != NULL );

  NW_ASSERT( thisObj->iterPtr == NULL );

  NW_ASSERT( thisObj->strTable == NULL );

  /* Require an empty structure or at least 1 name-value pair. */

  NW_ASSERT( (thisObj->size == 0) || ( thisObj->size >= 3));

  /* Allow an empty structure. */

  if ( thisObj->size == 0 ) {

    return KBrsrSuccess;

  }

  byteCnt = thisObj->size * sizeof (NW_Ucs2);

  storage = (NW_Ucs2*) NW_Mem_Malloc( byteCnt );

  if (storage == NULL) {

    return KBrsrOutOfMemory;

  }

  /* Zero out structure. */

  NW_Mem_memset( storage, 0, byteCnt );

  thisObj->iterPtr = storage;

  thisObj->strTable = storage;

  return KBrsrSuccess;

}

TBrowserStatusCode NW_NVPair_Add (NW_NVPair_t* thisObj, 

                           const NW_Ucs2* name,

                           const NW_Ucs2* value)

{

  NW_Uint32 len;

  NW_Int32  strTableLen;

  NW_ASSERT( thisObj != NULL );

  NW_ASSERT( thisObj->iterPtr != NULL );

  NW_ASSERT( thisObj->strTable != NULL );

  NW_ASSERT( name != NULL ); 

  /* WML Spec says that the name is required 

  If name is NULL, do not add this pair*/

  if (name[0] == '\0') {

      return KBrsrSuccess;

  }

  len = NW_Str_Strlen( name ) + 1;

  strTableLen = thisObj->iterPtr - thisObj->strTable;

  NW_ASSERT( strTableLen >= 0 );

  if ( (NW_UINT32_CAST(strTableLen) + len) > thisObj->size ) {

    return KBrsrBufferTooSmall;

  }

  NW_Str_Strcpy( thisObj->iterPtr, name );

  thisObj->iterPtr += len;

  /* Treat null pointer for value as empty string (""). */

  len = (value == NULL) ? 1 : NW_Str_Strlen( value ) + 1;

  strTableLen = thisObj->iterPtr - thisObj->strTable;

  NW_ASSERT( strTableLen >= 0 );

  if ( (NW_UINT32_CAST(strTableLen) + len) > thisObj->size ) {

    return KBrsrBufferTooSmall;

  }

  if ( value == NULL) {

    /* Store NULL pointer as empty string (""). */

    thisObj->iterPtr[0] = 0;

  } else {

    NW_Str_Strcpy( thisObj->iterPtr, value );

  }

  thisObj->iterPtr += len;

  return KBrsrSuccess;

}

TBrowserStatusCode NW_NVPair_ResetIter (NW_NVPair_t* thisObj)

{

  if ( thisObj == NULL ) {

    /* Treat NULL pointer like an empty object. */

    return KBrsrSuccess;

  }

  thisObj->iterPtr = thisObj->strTable;

  return KBrsrSuccess;

}

TBrowserStatusCode NW_NVPair_GetNext (NW_NVPair_t* thisObj, NW_Ucs2** name,

                               NW_Ucs2** value)

{

  NW_Int32 strTableLen;

  NW_ASSERT( name != NULL );

  NW_ASSERT( value != NULL );

  *name = NULL;

  *value = NULL;

  if ( thisObj == NULL ) {

    /* Treat NULL pointer like an empty object. */

    return KBrsrNotFound;

  }

  NW_ASSERT( thisObj->iterPtr != NULL );

  NW_ASSERT( thisObj->strTable != NULL );

  strTableLen = thisObj->iterPtr - thisObj->strTable;

  NW_ASSERT( strTableLen >= 0 );

  if ( NW_UINT32_CAST(strTableLen) >= thisObj->size ) {

    return KBrsrNotFound;

  }

  /* Require that name is not an empty string (""). */

  NW_ASSERT( thisObj->iterPtr[0] != 0 ); 

  *name = thisObj->iterPtr;

  thisObj->iterPtr += (NW_Str_Strlen( thisObj->iterPtr ) + 1);

  /* Must be value if found name because always insert in pairs. */

  strTableLen = thisObj->iterPtr - thisObj->strTable;

  NW_ASSERT( ( strTableLen >= 0 ) && 

             ( NW_UINT32_CAST(strTableLen) < thisObj->size ) ); 

  *value = thisObj->iterPtr;

  thisObj->iterPtr += (NW_Str_Strlen( thisObj->iterPtr ) + 1);

  return KBrsrSuccess;

}