Adding upstream version 2.4.57+dfsg.upstream/2.4.57+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 485 insertions, 0 deletions

diff --git a/libraries/libldap/utf-8-conv.c b/libraries/libldap/utf-8-conv.c
new file mode 100644
index 0000000..eb55509
--- /dev/null
+++ b/libraries/libldap/utf-8-conv.c
@@ -0,0 +1,485 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2021 The OpenLDAP Foundation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ */
+/* Portions Copyright (C) 1999, 2000 Novell, Inc. All Rights Reserved.
+ * 
+ * THIS WORK IS SUBJECT TO U.S. AND INTERNATIONAL COPYRIGHT LAWS AND
+ * TREATIES. USE, MODIFICATION, AND REDISTRIBUTION OF THIS WORK IS SUBJECT
+ * TO VERSION 2.0.1 OF THE OPENLDAP PUBLIC LICENSE, A COPY OF WHICH IS
+ * AVAILABLE AT HTTP://WWW.OPENLDAP.ORG/LICENSE.HTML OR IN THE FILE "LICENSE"
+ * IN THE TOP-LEVEL DIRECTORY OF THE DISTRIBUTION. ANY USE OR EXPLOITATION
+ * OF THIS WORK OTHER THAN AS AUTHORIZED IN VERSION 2.0.1 OF THE OPENLDAP
+ * PUBLIC LICENSE, OR OTHER PRIOR WRITTEN CONSENT FROM NOVELL, COULD SUBJECT
+ * THE PERPETRATOR TO CRIMINAL AND CIVIL LIABILITY. 
+ *---
+ * Note: A verbatim copy of version 2.0.1 of the OpenLDAP Public License 
+ * can be found in the file "build/LICENSE-2.0.1" in this distribution
+ * of OpenLDAP Software.
+ */
+
+/*
+ * UTF-8 Conversion Routines
+ *
+ * These routines convert between Wide Character and UTF-8,
+ * or between MultiByte and UTF-8 encodings.
+ *
+ * Both single character and string versions of the functions are provided.
+ * All functions return -1 if the character or string cannot be converted.
+ */
+
+#include "portable.h"
+
+#if SIZEOF_WCHAR_T >= 4
+/* These routines assume ( sizeof(wchar_t) >= 4 ) */
+
+#include <stdio.h>
+#include <ac/stdlib.h>		/* For wctomb, wcstombs, mbtowc, mbstowcs */
+#include <ac/string.h>
+#include <ac/time.h>		/* for time_t */
+
+#include "ldap-int.h"
+
+#include <ldap_utf8.h>
+
+static unsigned char mask[] = { 0, 0x7f, 0x1f, 0x0f, 0x07, 0x03, 0x01 };
+
+
+/*-----------------------------------------------------------------------------
+					UTF-8 Format Summary
+
+ASCII chars 						7 bits
+    0xxxxxxx
+    
+2-character UTF-8 sequence:        11 bits
+    110xxxxx  10xxxxxx
+
+3-character UTF-8                  16 bits
+    1110xxxx  10xxxxxx  10xxxxxx   
+    
+4-char UTF-8                       21 bits 
+    11110xxx  10xxxxxx  10xxxxxx  10xxxxxx
+    
+5-char UTF-8                       26 bits
+    111110xx  10xxxxxx  10xxxxxx  10xxxxxx  10xxxxxx
+    
+6-char UTF-8                       31 bits
+    1111110x  10xxxxxx  10xxxxxx  10xxxxxx  10xxxxxx  10xxxxxx
+    
+Unicode address space   (0 - 0x10FFFF)    21 bits
+ISO-10646 address space (0 - 0x7FFFFFFF)  31 bits
+
+Note: This code does not prevent UTF-8 sequences which are longer than
+      necessary from being decoded.
+*/
+
+/*----------------------------------------------------------------------------- 
+   Convert a UTF-8 character to a wide char. 
+   Return the length of the UTF-8 input character in bytes.
+*/
+int
+ldap_x_utf8_to_wc ( wchar_t *wchar, const char *utf8char )
+{
+	int utflen, i;
+	wchar_t ch;
+
+	if (utf8char == NULL) return -1;
+
+	/* Get UTF-8 sequence length from 1st byte */
+	utflen = LDAP_UTF8_CHARLEN2(utf8char, utflen);
+	
+	if( utflen==0 || utflen > (int)LDAP_MAX_UTF8_LEN ) return -1;
+
+	/* First byte minus length tag */
+	ch = (wchar_t)(utf8char[0] & mask[utflen]);
+	
+	for(i=1; i < utflen; i++) {
+		/* Subsequent bytes must start with 10 */
+		if ((utf8char[i] & 0xc0) != 0x80) return -1;
+	
+		ch <<= 6;			/* 6 bits of data in each subsequent byte */
+		ch |= (wchar_t)(utf8char[i] & 0x3f);
+	}
+	
+	if (wchar) *wchar = ch;
+
+	return utflen;
+}
+
+/*-----------------------------------------------------------------------------
+   Convert a UTF-8 string to a wide char string.
+   No more than 'count' wide chars will be written to the output buffer.
+   Return the size of the converted string in wide chars, excl null terminator.
+*/
+int
+ldap_x_utf8s_to_wcs ( wchar_t *wcstr, const char *utf8str, size_t count )
+{
+	size_t wclen = 0;
+	int utflen, i;
+	wchar_t ch;
+
+
+	/* If input ptr is NULL or empty... */
+	if (utf8str == NULL || !*utf8str) {
+		if ( wcstr )
+			*wcstr = 0;
+		return 0;
+	}
+
+	/* Examine next UTF-8 character.  If output buffer is NULL, ignore count */
+	while ( *utf8str && (wcstr==NULL || wclen<count) ) {
+		/* Get UTF-8 sequence length from 1st byte */
+		utflen = LDAP_UTF8_CHARLEN2(utf8str, utflen);
+		
+		if( utflen==0 || utflen > (int)LDAP_MAX_UTF8_LEN ) return -1;
+
+		/* First byte minus length tag */
+		ch = (wchar_t)(utf8str[0] & mask[utflen]);
+		
+		for(i=1; i < utflen; i++) {
+			/* Subsequent bytes must start with 10 */
+			if ((utf8str[i] & 0xc0) != 0x80) return -1;
+		
+			ch <<= 6;			/* 6 bits of data in each subsequent byte */
+			ch |= (wchar_t)(utf8str[i] & 0x3f);
+		}
+		
+		if (wcstr) wcstr[wclen] = ch;
+		
+		utf8str += utflen;	/* Move to next UTF-8 character */
+		wclen++;			/* Count number of wide chars stored/required */
+	}
+
+	/* Add null terminator if there's room in the buffer. */
+	if (wcstr && wclen < count) wcstr[wclen] = 0;
+
+	return wclen;
+}
+
+
+/*----------------------------------------------------------------------------- 
+   Convert one wide char to a UTF-8 character.
+   Return the length of the converted UTF-8 character in bytes.
+   No more than 'count' bytes will be written to the output buffer.
+*/
+int
+ldap_x_wc_to_utf8 ( char *utf8char, wchar_t wchar, size_t count )
+{
+	int len=0;
+
+	if (utf8char == NULL)   /* Just determine the required UTF-8 char length. */
+	{						/* Ignore count */
+		if( wchar < 0 )
+			return -1;
+		if( wchar < 0x80 )
+			return 1;
+		if( wchar < 0x800 )
+			return 2; 
+		if( wchar < 0x10000 )
+			return 3;
+		if( wchar < 0x200000 ) 
+			return 4;
+		if( wchar < 0x4000000 ) 
+			return 5;
+#if SIZEOF_WCHAR_T > 4
+		/* UL is not strictly needed by ANSI C */
+		if( wchar < (wchar_t)0x80000000UL )
+#endif /* SIZEOF_WCHAR_T > 4 */
+			return 6;
+		return -1;
+	}
+
+	
+	if ( wchar < 0 ) {				/* Invalid wide character */
+		len = -1;
+
+	} else if( wchar < 0x80 ) {
+		if (count >= 1) {
+			utf8char[len++] = (char)wchar;
+		}
+
+	} else if( wchar < 0x800 ) {
+		if (count >=2) {
+			utf8char[len++] = 0xc0 | ( wchar >> 6 );
+			utf8char[len++] = 0x80 | ( wchar & 0x3f );
+		}
+
+	} else if( wchar < 0x10000 ) {
+		if (count >= 3) {	
+			utf8char[len++] = 0xe0 | ( wchar >> 12 );
+			utf8char[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
+			utf8char[len++] = 0x80 | ( wchar & 0x3f );
+		}
+	
+	} else if( wchar < 0x200000 ) {
+		if (count >= 4) {
+			utf8char[len++] = 0xf0 | ( wchar >> 18 );
+			utf8char[len++] = 0x80 | ( (wchar >> 12) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
+			utf8char[len++] = 0x80 | ( wchar & 0x3f );
+		}
+
+	} else if( wchar < 0x4000000 ) {
+		if (count >= 5) {
+			utf8char[len++] = 0xf8 | ( wchar >> 24 );
+			utf8char[len++] = 0x80 | ( (wchar >> 18) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 12) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
+			utf8char[len++] = 0x80 | ( wchar & 0x3f );
+		}
+
+	} else
+#if SIZEOF_WCHAR_T > 4
+		/* UL is not strictly needed by ANSI C */
+		if( wchar < (wchar_t)0x80000000UL )
+#endif /* SIZEOF_WCHAR_T > 4 */
+	{
+		if (count >= 6) {
+			utf8char[len++] = 0xfc | ( wchar >> 30 );
+			utf8char[len++] = 0x80 | ( (wchar >> 24) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 18) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 12) & 0x3f );
+			utf8char[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
+			utf8char[len++] = 0x80 | ( wchar & 0x3f );
+		}
+
+#if SIZEOF_WCHAR_T > 4
+	} else {
+		len = -1;
+#endif /* SIZEOF_WCHAR_T > 4 */
+	}
+	
+	return len;
+
+}
+
+
+/*-----------------------------------------------------------------------------
+   Convert a wide char string to a UTF-8 string.
+   No more than 'count' bytes will be written to the output buffer.
+   Return the # of bytes written to the output buffer, excl null terminator.
+*/
+int
+ldap_x_wcs_to_utf8s ( char *utf8str, const wchar_t *wcstr, size_t count )
+{
+	int len = 0;
+	int n;
+	char *p = utf8str;
+	wchar_t empty = 0;		/* To avoid use of L"" construct */
+
+	if (wcstr == NULL)		/* Treat input ptr NULL as an empty string */
+		wcstr = &empty;
+
+	if (utf8str == NULL)	/* Just compute size of output, excl null */
+	{
+		while (*wcstr)
+		{
+			/* Get UTF-8 size of next wide char */
+			n = ldap_x_wc_to_utf8( NULL, *wcstr++, LDAP_MAX_UTF8_LEN);
+			if (n == -1)
+				return -1;
+			len += n;
+		}
+
+		return len;
+	}
+
+	
+	/* Do the actual conversion. */
+
+	n = 1;					/* In case of empty wcstr */
+	while (*wcstr)
+	{
+		n = ldap_x_wc_to_utf8( p, *wcstr++, count);
+		
+		if (n <= 0)  		/* If encoding error (-1) or won't fit (0), quit */
+			break;
+		
+		p += n;
+		count -= n;			/* Space left in output buffer */
+	}
+
+	/* If not enough room for last character, pad remainder with null
+	   so that return value = original count, indicating buffer full. */
+	if (n == 0)
+	{
+		while (count--)
+			*p++ = 0;
+	}
+
+	/* Add a null terminator if there's room. */
+	else if (count)
+		*p = 0;
+
+	if (n == -1)			/* Conversion encountered invalid wide char. */
+		return -1;
+
+	/* Return the number of bytes written to output buffer, excl null. */ 
+	return (p - utf8str);
+}
+
+#ifdef ANDROID
+int wctomb(char *s, wchar_t wc) { return wcrtomb(s,wc,NULL); }
+int mbtowc(wchar_t *pwc, const char *s, size_t n) { return mbrtowc(pwc, s, n, NULL); }
+#endif
+
+/*-----------------------------------------------------------------------------
+   Convert a UTF-8 character to a MultiByte character.
+   Return the size of the converted character in bytes.
+*/
+int
+ldap_x_utf8_to_mb ( char *mbchar, const char *utf8char,
+		int (*f_wctomb)(char *mbchar, wchar_t wchar) )
+{
+	wchar_t wchar;
+	int n;
+	char tmp[6];				/* Large enough for biggest multibyte char */
+
+	if (f_wctomb == NULL)		/* If no conversion function was given... */
+		f_wctomb = wctomb;		/*    use the local ANSI C function */
+ 
+	/* First convert UTF-8 char to a wide char */
+	n = ldap_x_utf8_to_wc( &wchar, utf8char);
+
+	if (n == -1)
+		return -1;		/* Invalid UTF-8 character */
+
+	if (mbchar == NULL)
+		n = f_wctomb( tmp, wchar );
+	else
+		n = f_wctomb( mbchar, wchar);
+
+	return n;
+}
+
+/*-----------------------------------------------------------------------------
+   Convert a UTF-8 string to a MultiByte string.
+   No more than 'count' bytes will be written to the output buffer.
+   Return the size of the converted string in bytes, excl null terminator.
+*/
+int
+ldap_x_utf8s_to_mbs ( char *mbstr, const char *utf8str, size_t count,
+		size_t (*f_wcstombs)(char *mbstr, const wchar_t *wcstr, size_t count) )
+{
+	wchar_t *wcs;
+	size_t wcsize;
+    int n;
+
+	if (f_wcstombs == NULL)		/* If no conversion function was given... */
+		f_wcstombs = wcstombs;	/*    use the local ANSI C function */
+ 
+	if (utf8str == NULL || *utf8str == 0)	/* NULL or empty input string */
+	{
+		if (mbstr)
+			*mbstr = 0;
+		return 0;
+	}
+
+/* Allocate memory for the maximum size wchar string that we could get. */
+	wcsize = strlen(utf8str) + 1;
+	wcs = (wchar_t *)LDAP_MALLOC(wcsize * sizeof(wchar_t));
+	if (wcs == NULL)
+		return -1;				/* Memory allocation failure. */
+
+	/* First convert the UTF-8 string to a wide char string */
+	n = ldap_x_utf8s_to_wcs( wcs, utf8str, wcsize);
+
+	/* Then convert wide char string to multi-byte string */
+	if (n != -1)
+	{
+		n = f_wcstombs(mbstr, wcs, count);
+	}
+
+	LDAP_FREE(wcs);
+
+	return n;
+}
+
+/*-----------------------------------------------------------------------------
+   Convert a MultiByte character to a UTF-8 character.
+   'mbsize' indicates the number of bytes of 'mbchar' to check.
+   Returns the number of bytes written to the output character.
+*/
+int
+ldap_x_mb_to_utf8 ( char *utf8char, const char *mbchar, size_t mbsize,
+		int (*f_mbtowc)(wchar_t *wchar, const char *mbchar, size_t count) )
+{
+    wchar_t wchar;
+    int n;
+
+	if (f_mbtowc == NULL)		/* If no conversion function was given... */
+		f_mbtowc = mbtowc;		/*    use the local ANSI C function */
+ 
+    if (mbsize == 0)				/* 0 is not valid. */
+        return -1;
+
+    if (mbchar == NULL || *mbchar == 0)
+    {
+        if (utf8char)
+            *utf8char = 0;
+        return 1;
+    }
+
+	/* First convert the MB char to a Wide Char */
+	n = f_mbtowc( &wchar, mbchar, mbsize);
+
+	if (n == -1)
+		return -1;
+
+	/* Convert the Wide Char to a UTF-8 character. */
+	n = ldap_x_wc_to_utf8( utf8char, wchar, LDAP_MAX_UTF8_LEN);
+
+	return n;
+}
+
+
+/*-----------------------------------------------------------------------------
+   Convert a MultiByte string to a UTF-8 string.
+   No more than 'count' bytes will be written to the output buffer.
+   Return the size of the converted string in bytes, excl null terminator.
+*/   
+int
+ldap_x_mbs_to_utf8s ( char *utf8str, const char *mbstr, size_t count,
+		size_t (*f_mbstowcs)(wchar_t *wcstr, const char *mbstr, size_t count) )
+{
+	wchar_t *wcs;
+	int n;
+	size_t wcsize;
+
+	if (mbstr == NULL)		   /* Treat NULL input string as an empty string */
+		mbstr = "";
+
+	if (f_mbstowcs == NULL)		/* If no conversion function was given... */
+		f_mbstowcs = mbstowcs;	/*    use the local ANSI C function */
+ 
+	/* Allocate memory for the maximum size wchar string that we could get. */
+	wcsize = strlen(mbstr) + 1;
+	wcs = (wchar_t *)LDAP_MALLOC( wcsize * sizeof(wchar_t) );
+	if (wcs == NULL)
+		return -1;
+
+	/* First convert multi-byte string to a wide char string */
+	n = f_mbstowcs(wcs, mbstr, wcsize);
+
+	/* Convert wide char string to UTF-8 string */
+	if (n != -1)
+	{
+		n = ldap_x_wcs_to_utf8s( utf8str, wcs, count);
+	}
+
+	LDAP_FREE(wcs);
+
+	return n;	
+}
+
+#endif /* SIZEOF_WCHAR_T >= 4 */