/
ff_string.c
784 lines (664 loc) · 23.4 KB
/
ff_string.c
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/*
* FreeRTOS+FAT V2.3.3
* Copyright (C) 2021 Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of
* this software and associated documentation files (the "Software"), to deal in
* the Software without restriction, including without limitation the rights to
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
* the Software, and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* https://www.FreeRTOS.org
* https://github.com/FreeRTOS
*
*/
/**
* @file ff_string.c
* @ingroup STRING
*
* @defgroup STRING FreeRTOS+FAT String Library
* @brief Portable String Library for FreeRTOS+FAT
*
*
**/
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "ff_headers.h"
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
#include <wchar.h>
#include <wctype.h>
#endif
/*
* These will eventually be moved into a platform independent string
* library. Which will be optional. (To allow the use of system specific versions).
*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
void FF_cstrntowcs( FF_T_WCHAR * wcsDest,
const char * szpSource,
uint32_t ulLength )
{
while( ( *szpSource != '\0' ) && ( ulLength-- != 0 ) )
{
*( wcsDest++ ) = *( szpSource++ );
}
*wcsDest = '\0';
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
void FF_cstrtowcs( FF_T_WCHAR * wcsDest,
const char * szpSource )
{
while( *szpSource != '\0' )
{
*wcsDest++ = ( FF_T_WCHAR ) *( szpSource++ );
}
*wcsDest = '\0';
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
void FF_wcstocstr( char * szpDest,
const FF_T_WCHAR * wcsSource )
{
while( *wcsSource != '\0' )
{
*szpDest++ = ( int8_t ) *( wcsSource++ );
}
*szpDest = '\0';
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/*-----------------------------------------------------------*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
void FF_wcsntocstr( char * szpDest,
const FF_T_WCHAR * wcsSource,
uint32_t ulLength )
{
while( ( *wcsSource != '\0' ) && ( ulLength-- != 0 ) )
{
*( szpDest++ ) = ( int8_t ) *( wcsSource++ );
}
*szpDest = '\0';
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/*-----------------------------------------------------------*/
/*-----------------------------------------------------------*/
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 )
void FF_toupper( FF_T_WCHAR * string,
uint32_t ulLength )
{
uint32_t i;
for( i = 0; i < ulLength; i++ )
{
string[ i ] = towupper( string[ i ] );
}
}
/*-----------------------------------------------------------*/
void FF_tolower( FF_T_WCHAR * string,
uint32_t ulLength )
{
uint32_t i;
for( i = 0; i < ulLength; i++ )
{
string[ i ] = towlower( string[ i ] );
}
}
/*-----------------------------------------------------------*/
#else /* ffconfigUNICODE_UTF16_SUPPORT */
void FF_toupper( char * string,
uint32_t ulLength )
{
uint32_t i;
for( i = 0; i < ulLength; i++ )
{
if( ( string[ i ] >= 'a' ) && ( string[ i ] <= 'z' ) )
{
string[ i ] -= 32;
}
if( string[ i ] == '\0' )
{
break;
}
}
}
/*-----------------------------------------------------------*/
void FF_tolower( char * string,
uint32_t ulLength )
{
uint32_t i;
for( i = 0; i < ulLength; i++ )
{
if( ( string[ i ] >= 'A' ) && ( string[ i ] <= 'Z' ) )
{
string[ i ] += 32;
}
if( string[ i ] == '\0' )
{
break;
}
}
}
/*-----------------------------------------------------------*/
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/**
* @private
* @brief Compares 2 strings for the specified length, and returns pdTRUE is they are identical
* otherwise pdFALSE is returned.
*
**/
#if ( ffconfigUNICODE_UTF16_SUPPORT == 0 )
BaseType_t FF_strmatch( const char * str1,
const char * str2,
BaseType_t xLength )
{
register BaseType_t i;
register char char1, char2;
if( xLength == 0 )
{
xLength = ( BaseType_t ) strlen( str1 );
if( xLength != ( BaseType_t ) strlen( str2 ) )
{
return pdFALSE;
}
}
for( i = 0; i < xLength; i++ )
{
char1 = str1[ i ];
char2 = str2[ i ];
if( ( char1 >= 'A' ) && ( char1 <= 'Z' ) )
{
char1 += 32;
}
if( ( char2 >= 'A' ) && ( char2 <= 'Z' ) )
{
char2 += 32;
}
if( char1 != char2 )
{
return pdFALSE;
}
}
return pdTRUE;
}
#else /* ffconfigUNICODE_UTF16_SUPPORT */
BaseType_t FF_strmatch( const FF_T_WCHAR * str1,
const FF_T_WCHAR * str2,
BaseType_t xLength )
{
register BaseType_t i;
register FF_T_WCHAR char1, char2;
if( xLength == 0 )
{
xLength = wcslen( str1 );
if( xLength != wcslen( str2 ) )
{
return pdFALSE;
}
}
for( i = 0; i < xLength; i++ )
{
char1 = towlower( str1[ i ] );
char2 = towlower( str2[ i ] );
if( char1 != char2 )
{
return pdFALSE;
}
}
return pdTRUE;
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/**
* @private
* @brief A re-entrant Strtok function. No documentation is provided :P
* Use at your own risk. (This is for FreeRTOS+FAT's use only).
**/
#if ( ffconfigUNICODE_UTF16_SUPPORT == 0 )
char * FF_strtok( const char * string,
char * token,
uint16_t * tokenNumber,
BaseType_t * last,
BaseType_t xLength )
{
uint16_t i, y, tokenStart, tokenEnd = 0;
i = 0;
y = 0;
if( ( string[ i ] == '\\' ) || ( string[ i ] == '/' ) )
{
i++;
}
tokenStart = i;
while( i < xLength )
{
if( ( string[ i ] == '\\' ) || ( string[ i ] == '/' ) )
{
y++;
if( y == *tokenNumber )
{
tokenStart = ( uint16_t ) ( i + 1 );
}
if( y == ( *tokenNumber + 1 ) )
{
tokenEnd = i;
break;
}
}
i++;
}
if( tokenEnd == 0 )
{
if( *last == pdTRUE )
{
return NULL;
}
else
{
*last = pdTRUE;
}
tokenEnd = i;
}
if( ( tokenEnd - tokenStart ) < ffconfigMAX_FILENAME )
{
memcpy( token, ( string + tokenStart ), ( uint32_t ) ( tokenEnd - tokenStart ) );
token[ tokenEnd - tokenStart ] = '\0';
}
else
{
memcpy( token, ( string + tokenStart ), ( uint32_t ) ( ffconfigMAX_FILENAME ) );
token[ ffconfigMAX_FILENAME - 1 ] = '\0';
}
/*token[tokenEnd - tokenStart] = '\0'; */
*tokenNumber += 1;
return token;
}
#else /* ffconfigUNICODE_UTF16_SUPPORT */
FF_T_WCHAR * FF_strtok( const FF_T_WCHAR * string,
FF_T_WCHAR * token,
uint16_t * tokenNumber,
BaseType_t * last,
BaseType_t xLength )
{
uint16_t i, y, tokenStart, tokenEnd = 0;
i = 0;
y = 0;
if( ( string[ i ] == '\\' ) || ( string[ i ] == '/' ) )
{
i++;
}
tokenStart = i;
while( i < xLength )
{
if( ( string[ i ] == '\\' ) || ( string[ i ] == '/' ) )
{
y++;
if( y == *tokenNumber )
{
tokenStart = ( uint16_t ) ( i + 1 );
}
if( y == ( *tokenNumber + 1 ) )
{
tokenEnd = i;
break;
}
}
i++;
}
if( tokenEnd == 0 )
{
if( *last == pdTRUE )
{
return NULL;
}
else
{
*last = pdTRUE;
}
tokenEnd = i;
}
if( ( tokenEnd - tokenStart ) < ffconfigMAX_FILENAME )
{
memcpy( token, ( string + tokenStart ), ( uint32_t ) ( tokenEnd - tokenStart ) * sizeof( FF_T_WCHAR ) );
token[ tokenEnd - tokenStart ] = '\0';
}
else
{
memcpy( token, ( string + tokenStart ), ( uint32_t ) ( ffconfigMAX_FILENAME ) * sizeof( FF_T_WCHAR ) );
token[ ffconfigMAX_FILENAME - 1 ] = '\0';
}
/*token[tokenEnd - tokenStart] = '\0'; */
*tokenNumber += 1;
return token;
}
#endif /* ffconfigUNICODE_UTF16_SUPPORT */
/* UTF-8 Routines */
/*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*
* 0001 0000-001F FFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
* 0020 0000-03FF FFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx -- We don't encode these because we won't receive them. (Invalid UNICODE).
* 0400 0000-7FFF FFFF 1111110x 10xxxxxx ... 10xxxxxx -- We don't encode these because we won't receive them. (Invalid UNICODE).
*/
#if ( ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) && ( WCHAR_MAX > 0xFFFF ) ) || ( ffconfigUNICODE_UTF8_SUPPORT != 0 )
UBaseType_t FF_GetUtf16SequenceLen( uint16_t usLeadChar )
{
UBaseType_t uxReturn;
if( ( usLeadChar & 0xFC00 ) == 0xD800 )
{
uxReturn = 2;
}
else
{
uxReturn = 1;
}
return uxReturn;
} /* FF_GetUtf16SequenceLen() */
#endif /* if ( ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) && ( WCHAR_MAX > 0xFFFF ) ) || ( ffconfigUNICODE_UTF8_SUPPORT != 0 ) */
/*-----------------------------------------------------------*/
/*
* Returns the number of UTF-8 units read.
* Will not exceed ulSize UTF-16 units. (ulSize * 2 bytes).
*/
/*
* UCS-4 range (hex.) UTF-8 octet sequence (binary)
* 0000 0000-0000 007F 0xxxxxxx
* 0000 0080-0000 07FF 110xxxxx 10xxxxxx
* 0000 0800-0000 FFFF 1110xxxx 10xxxxxx 10xxxxxx
*
* 0001 0000-001F FFFF 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
* 0020 0000-03FF FFFF 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx -- We don't encode these because we won't receive them. (Invalid UNICODE).
* 0400 0000-7FFF FFFF 1111110x 10xxxxxx ... 10xxxxxx -- We don't encode these because we won't receive them. (Invalid UNICODE).
*/
#if ( ffconfigUNICODE_UTF8_SUPPORT != 0 )
int32_t FF_Utf8ctoUtf16c( uint16_t * utf16Dest,
const uint8_t * utf8Source,
uint32_t ulSize )
{
uint32_t ulUtf32char;
uint16_t utf16Source = 0;
register int32_t lSequenceNumber = 0;
/* Count number of set bits before a zero. */
while( ( ( *utf8Source != '\0' ) & ( 0x80 >> ( lSequenceNumber ) ) ) )
{
lSequenceNumber++;
}
if( lSequenceNumber == 0UL )
{
lSequenceNumber++;
}
if( ulSize == 0UL )
{
/* Returned value becomes an error, with the highest bit set. */
lSequenceNumber = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF8CTOUTF16C;
}
else
{
switch( lSequenceNumber )
{
case 1:
utf16Source = ( uint16_t ) *utf8Source;
memcpy( utf16Dest, &utf16Source, sizeof( uint16_t ) );
break;
case 2:
utf16Source = ( uint16_t ) ( ( *utf8Source & 0x1F ) << 6 ) | ( ( *( utf8Source + 1 ) & 0x3F ) );
memcpy( utf16Dest, &utf16Source, sizeof( uint16_t ) );
break;
case 3:
utf16Source = ( uint16_t ) ( ( *utf8Source & 0x0F ) << 12 ) | ( ( *( utf8Source + 1 ) & 0x3F ) << 6 ) | ( ( *( utf8Source + 2 ) & 0x3F ) );
memcpy( utf16Dest, &utf16Source, sizeof( uint16_t ) );
break;
case 4:
if( ulSize < 2 )
{
/* Returned value becomes an error. */
lSequenceNumber = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF8CTOUTF16C;
}
else
{
/* Convert to UTF-32 and then into UTF-16 */
ulUtf32char = ( uint16_t )
( ( *utf8Source & 0x0F ) << 18 ) |
( ( *( utf8Source + 1 ) & 0x3F ) << 12 ) |
( ( *( utf8Source + 2 ) & 0x3F ) << 6 ) |
( ( *( utf8Source + 3 ) & 0x3F ) );
utf16Source = ( uint16_t ) ( ( ( ulUtf32char - 0x10000 ) & 0xFFC00 ) >> 10 ) | 0xD800;
memcpy( utf16Dest, &utf16Source, sizeof( uint16_t ) );
utf16Source = ( uint16_t ) ( ( ( ulUtf32char - 0x10000 ) & 0x003FF ) >> 00 ) | 0xDC00;
memcpy( utf16Dest + 1, &utf16Source, sizeof( uint16_t ) );
}
break;
default:
break;
}
}
return lSequenceNumber;
} /* FF_Utf8ctoUtf16c() */
#endif /* ffconfigUNICODE_UTF8_SUPPORT */
/*-----------------------------------------------------------*/
/*
* Returns the number of UTF-8 units required to encode the UTF-16 sequence.
* Will not exceed ulSize UTF-8 units. (ulSize * 1 bytes).
*/
#if ( ffconfigUNICODE_UTF8_SUPPORT != 0 )
int32_t FF_Utf16ctoUtf8c( uint8_t * utf8Dest,
const uint16_t * utf16Source,
uint32_t ulSize )
{
uint32_t ulUtf32char;
uint16_t ulUtf16char;
int32_t lReturn = 0L;
do
{
if( ulSize == 0UL )
{
lReturn = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF16CTOUTF8C;
break;
}
memcpy( &ulUtf16char, utf16Source, sizeof( uint16_t ) );
/* A surrogate sequence was encountered. Must transform to UTF32 first. */
if( ( ulUtf16char & 0xF800 ) == 0xD800 )
{
ulUtf32char = ( ( uint32_t ) ( ulUtf16char & 0x003FF ) << 10 ) + 0x10000;
memcpy( &ulUtf16char, utf16Source + 1, sizeof( uint16_t ) );
if( ( ulUtf16char & 0xFC00 ) != 0xDC00 )
{
/* Invalid UTF-16 sequence. */
lReturn = FF_ERR_UNICODE_INVALID_SEQUENCE | FF_UTF16CTOUTF8C;
break;
}
ulUtf32char |= ( ( uint32_t ) ( ulUtf16char & 0x003FF ) );
}
else
{
ulUtf32char = ( uint32_t ) ulUtf16char;
}
/* Now convert to the UTF-8 sequence. */
/* Single byte UTF-8 sequence. */
if( ulUtf32char < 0x00000080 )
{
*( utf8Dest + 0 ) = ( uint8_t ) ulUtf32char;
lReturn = 1;
break;
}
/* Double byte UTF-8 sequence. */
if( ulUtf32char < 0x00000800 )
{
if( ulSize < 2 )
{
lReturn = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF16CTOUTF8C;
}
else
{
*( utf8Dest + 0 ) = ( uint8_t ) ( 0xC0 | ( ( ulUtf32char >> 6 ) & 0x1F ) );
*( utf8Dest + 1 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 0 ) & 0x3F ) );
lReturn = 2;
}
break;
}
/* Triple byte UTF-8 sequence. */
if( ulUtf32char < 0x00010000 )
{
if( ulSize < 3 )
{
lReturn = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF16CTOUTF8C;
}
else
{
*( utf8Dest + 0 ) = ( uint8_t ) ( 0xE0 | ( ( ulUtf32char >> 12 ) & 0x0F ) );
*( utf8Dest + 1 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 6 ) & 0x3F ) );
*( utf8Dest + 2 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 0 ) & 0x3F ) );
lReturn = 3;
}
break;
}
/* Quadruple byte UTF-8 sequence. */
if( ulUtf32char < 0x00200000 )
{
if( ulSize < 4 )
{
lReturn = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF16CTOUTF8C;
}
else
{
*( utf8Dest + 0 ) = ( uint8_t ) ( 0xF0 | ( ( ulUtf32char >> 18 ) & 0x07 ) );
*( utf8Dest + 1 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 12 ) & 0x3F ) );
*( utf8Dest + 2 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 6 ) & 0x3F ) );
*( utf8Dest + 3 ) = ( uint8_t ) ( 0x80 | ( ( ulUtf32char >> 0 ) & 0x3F ) );
lReturn = 4;
}
break;
}
lReturn = FF_ERR_UNICODE_INVALID_CODE | FF_UTF16CTOUTF8C; /* Invalid Character */
}
while( pdFALSE );
return lReturn;
} /* FF_Utf16ctoUtf8c() */
#endif /* ffconfigUNICODE_UTF8_SUPPORT */
/*-----------------------------------------------------------*/
/* UTF-16 Support Functions */
/* Converts a UTF-32 Character into its equivalent UTF-16 sequence. */
#if ( ffconfigUNICODE_UTF16_SUPPORT != 0 ) && ( WCHAR_MAX > 0xFFFF )
int32_t FF_Utf32ctoUtf16c( uint16_t * utf16Dest,
uint32_t utf32char,
uint32_t ulSize )
{
int32_t lReturn;
/* Check that its a valid UTF-32 wide-char! */
/* This range is not a valid Unicode code point. */
if( ( utf32char >= 0xD800 ) && ( utf32char <= 0xDFFF ) )
{
lReturn = FF_ERR_UNICODE_INVALID_CODE | FF_UTF32CTOUTF16C; /* Invalid character. */
}
else if( utf32char < 0x10000 )
{
*utf16Dest = ( uint16_t ) utf32char; /* Simple conversion! Char comes within UTF-16 space (without surrogates). */
lReturn = 1;
}
else if( ulSize < 2 )
{
lReturn = FF_ERR_UNICODE_DEST_TOO_SMALL | FF_UTF32CTOUTF16C; /* Not enough UTF-16 units to record this character. */
}
else if( utf32char < 0x00200000 )
{
/* Conversion to a UTF-16 Surrogate pair! */
/*valueImage = utf32char - 0x10000; */
*( utf16Dest + 0 ) = ( uint16_t ) ( ( ( utf32char - 0x10000 ) & 0xFFC00 ) >> 10 ) | 0xD800;
*( utf16Dest + 1 ) = ( uint16_t ) ( ( ( utf32char - 0x10000 ) & 0x003FF ) >> 00 ) | 0xDC00;
lReturn = 2; /* Surrogate pair encoded value. */
}
else
{
/* Invalid Character */
lReturn = FF_ERR_UNICODE_INVALID_CODE | FF_UTF32CTOUTF16C;
}
return lReturn;
} /* FF_Utf32ctoUtf16c() */
#endif /* #if( ffconfigUNICODE_UTF16_SUPPORT != 0 ) && ( WCHAR_MAX > 0xFFFF ) */
/*-----------------------------------------------------------*/
/* Converts a UTF-16 sequence into its equivalent UTF-32 code point. */
#if ( ffconfigNOT_USED_FOR_NOW != 0 )
int32_t FF_Utf16ctoUtf32c( uint32_t * utf32Dest,
const uint16_t * utf16Source )
{
int32_t lReturn;
/*Not a surrogate sequence. */
if( ( *utf16Source & 0xFC00 ) != 0xD800 )
{
*utf32Dest = ( uint32_t ) *utf16Source;
lReturn = 1; /* A single UTF-16 item was used to represent the character. */
}
else
{
*utf32Dest = ( ( uint32_t ) ( *( utf16Source + 0 ) & 0x003FF ) << 10 ) + 0x10000;
if( ( *( utf16Source + 1 ) & 0xFC00 ) != 0xDC00 )
{
lReturn = FF_ERR_UNICODE_INVALID_SEQUENCE | FF_UTF16CTOUTF32C; /* Invalid UTF-16 sequence. */
}
else
{
*utf32Dest |= ( ( uint32_t ) ( *( utf16Source + 1 ) & 0x003FF ) );
lReturn = 2; /* 2 utf-16 units make up the Unicode code-point. */
}
}
return lReturn;
} /* FF_Utf16ctoUtf32c() */
#endif /* ffconfigNOT_USED_FOR_NOW */
/*-----------------------------------------------------------*/
/*
* Returns the total number of UTF-16 items required to represent
* the provided UTF-32 string in UTF-16 form.
*/
/*
* UBaseType_t FF_Utf32GetUtf16Len( const uint32_t *utf32String )
* {
* UBaseType_t utf16len = 0;
*
* while( *utf32String )
* {
* if( *utf32String++ <= 0xFFFF )
* {
* utf16len++;
* }
* else
* {
* utf16len += 2;
* }
* }
*
* return utf16len;
* }
*/
/*-----------------------------------------------------------*/
/* String conversions */
#if ( ffconfigNOT_USED_FOR_NOW != 0 )
int32_t FF_Utf32stoUtf8s( uint8_t * Utf8String,
uint32_t * Utf32String )
{
int i = 0, y = 0;
uint16_t utf16buffer[ 2 ];
while( Utf32String[ i ] != '\0' )
{
/* Convert to a UTF16 char. */
FF_Utf32ctoUtf16c( utf16buffer, Utf32String[ i ], 2 );
/* Now convert the UTF16 to UTF8 sequence. */
y += FF_Utf16ctoUtf8c( &Utf8String[ y ], utf16buffer, 4 );
i++;
}
Utf8String[ y ] = '\0';
return 0;
} /* FF_Utf32stoUtf8s() */
#endif /* ffconfigNOT_USED_FOR_NOW */
/*-----------------------------------------------------------*/