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Diffstat (limited to 'ldap/servers/slapd/utf8.c')
| -rw-r--r-- | ldap/servers/slapd/utf8.c | 310 |
1 files changed, 310 insertions, 0 deletions
diff --git a/ldap/servers/slapd/utf8.c b/ldap/servers/slapd/utf8.c new file mode 100644 index 00000000..df092024 --- /dev/null +++ b/ldap/servers/slapd/utf8.c @@ -0,0 +1,310 @@ +/** BEGIN COPYRIGHT BLOCK + * This Program is free software; you can redistribute it and/or modify it under + * the terms of the GNU General Public License as published by the Free Software + * Foundation; version 2 of the License. + * + * This Program is distributed in the hope that it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License along with + * this Program; if not, write to the Free Software Foundation, Inc., 59 Temple + * Place, Suite 330, Boston, MA 02111-1307 USA. + * + * In addition, as a special exception, Red Hat, Inc. gives You the additional + * right to link the code of this Program with code not covered under the GNU + * General Public License ("Non-GPL Code") and to distribute linked combinations + * including the two, subject to the limitations in this paragraph. Non-GPL Code + * permitted under this exception must only link to the code of this Program + * through those well defined interfaces identified in the file named EXCEPTION + * found in the source code files (the "Approved Interfaces"). The files of + * Non-GPL Code may instantiate templates or use macros or inline functions from + * the Approved Interfaces without causing the resulting work to be covered by + * the GNU General Public License. Only Red Hat, Inc. may make changes or + * additions to the list of Approved Interfaces. You must obey the GNU General + * Public License in all respects for all of the Program code and other code used + * in conjunction with the Program except the Non-GPL Code covered by this + * exception. If you modify this file, you may extend this exception to your + * version of the file, but you are not obligated to do so. If you do not wish to + * provide this exception without modification, you must delete this exception + * statement from your version and license this file solely under the GPL without + * exception. + * + * + * END COPYRIGHT BLOCK **/ +/* ***** BEGIN LICENSE BLOCK ***** + * + * The Original Code is Mozilla Communicator client code, released + * March 31, 1998. + * + * The Initial Developer of the Original Code is + * Netscape Communications Corporation. + * Portions created by the Initial Developer are Copyright (C) 1998-1999 + * the Initial Developer. All Rights Reserved. + * + * Contributor(s): + * + * Alternatively, the contents of this file may be used under the terms of + * either of the GNU General Public License Version 2 or later (the "GPL"), + * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), + * in which case the provisions of the GPL or the LGPL are applicable instead + * of those above. If you wish to allow use of your version of this file only + * under the terms of either the GPL or the LGPL, and not to allow others to + * use your version of this file under the terms of the MPL, indicate your + * decision by deleting the provisions above and replace them with the notice + * and other provisions required by the GPL or the LGPL. If you do not delete + * the provisions above, a recipient may use your version of this file under + * the terms of any one of the MPL, the GPL or the LGPL. + * + * June 25, 2009 - copied from Mozilla LDAP C SDK - relicensed to use GPLv2 + * with directory server plug-in exception as per the above paragraph + * + * ***** END LICENSE BLOCK ***** */ + +/* the openldap library has utf8 string handling functions, but they + are somewhat different, and not exposed/exported for use outside + of the library - therefore, we just copy these from mozldap when + using openldap +*/ +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#if defined(USE_OPENLDAP) + +/* uft8.c - misc. utf8 "string" functions. */ +#include "slapi-plugin.h" + +static char UTF8len[64] += {1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 5, 6}; + +int +ldap_utf8len (const char* s) + /* Return the number of char's in the character at *s. */ +{ + return ldap_utf8next((char*)s) - s; +} + +char* +ldap_utf8next (char* s) + /* Return a pointer to the character immediately following *s. + Handle any valid UTF-8 character, including '\0' and ASCII. + Try to handle a misaligned pointer or a malformed character. + */ +{ + register unsigned char* next = (unsigned char*)s; + switch (UTF8len [(*next >> 2) & 0x3F]) { + case 0: /* erroneous: s points to the middle of a character. */ + case 6: if ((*++next & 0xC0) != 0x80) break; + case 5: if ((*++next & 0xC0) != 0x80) break; + case 4: if ((*++next & 0xC0) != 0x80) break; + case 3: if ((*++next & 0xC0) != 0x80) break; + case 2: if ((*++next & 0xC0) != 0x80) break; + case 1: ++next; + } + return (char*) next; +} + +char* +ldap_utf8prev (char* s) + /* Return a pointer to the character immediately preceding *s. + Handle any valid UTF-8 character, including '\0' and ASCII. + Try to handle a misaligned pointer or a malformed character. + */ +{ + register unsigned char* prev = (unsigned char*)s; + unsigned char* limit = prev - 6; + while (((*--prev & 0xC0) == 0x80) && (prev != limit)) { + ; + } + return (char*) prev; +} + +int +ldap_utf8copy (char* dst, const char* src) + /* Copy a character from src to dst; return the number of char's copied. + Handle any valid UTF-8 character, including '\0' and ASCII. + Try to handle a misaligned pointer or a malformed character. + */ +{ + register const unsigned char* s = (const unsigned char*)src; + switch (UTF8len [(*s >> 2) & 0x3F]) { + case 0: /* erroneous: s points to the middle of a character. */ + case 6: *dst++ = *s++; if ((*s & 0xC0) != 0x80) break; + case 5: *dst++ = *s++; if ((*s & 0xC0) != 0x80) break; + case 4: *dst++ = *s++; if ((*s & 0xC0) != 0x80) break; + case 3: *dst++ = *s++; if ((*s & 0xC0) != 0x80) break; + case 2: *dst++ = *s++; if ((*s & 0xC0) != 0x80) break; + case 1: *dst = *s++; + } + return s - (const unsigned char*)src; +} + +size_t +ldap_utf8characters (const char* src) + /* Return the number of UTF-8 characters in the 0-terminated array s. */ +{ + register char* s = (char*)src; + size_t n; + for (n = 0; *s; LDAP_UTF8INC(s)) ++n; + return n; +} + +unsigned long +ldap_utf8getcc( const char** src ) +{ + register unsigned long c = 0; + register const unsigned char* s = (const unsigned char*)*src; + switch (UTF8len [(*s >> 2) & 0x3F]) { + case 0: /* erroneous: s points to the middle of a character. */ + c = (*s++) & 0x3F; goto more5; + case 1: c = (*s++); break; + case 2: c = (*s++) & 0x1F; goto more1; + case 3: c = (*s++) & 0x0F; goto more2; + case 4: c = (*s++) & 0x07; goto more3; + case 5: c = (*s++) & 0x03; goto more4; + case 6: c = (*s++) & 0x01; goto more5; + more5: if ((*s & 0xC0) != 0x80) break; c = (c << 6) | ((*s++) & 0x3F); + more4: if ((*s & 0xC0) != 0x80) break; c = (c << 6) | ((*s++) & 0x3F); + more3: if ((*s & 0xC0) != 0x80) break; c = (c << 6) | ((*s++) & 0x3F); + more2: if ((*s & 0xC0) != 0x80) break; c = (c << 6) | ((*s++) & 0x3F); + more1: if ((*s & 0xC0) != 0x80) break; c = (c << 6) | ((*s++) & 0x3F); + break; + } + *src = (const char*)s; + return c; +} + +char* +ldap_utf8strtok_r( char* sp, const char* brk, char** next) +{ + const char *bp; + unsigned long sc, bc; + char *tok; + + if (sp == NULL && (sp = *next) == NULL) + return NULL; + + /* Skip leading delimiters; roughly, sp += strspn(sp, brk) */ + cont: + sc = LDAP_UTF8GETC(sp); + for (bp = brk; (bc = LDAP_UTF8GETCC(bp)) != 0;) { + if (sc == bc) + goto cont; + } + + if (sc == 0) { /* no non-delimiter characters */ + *next = NULL; + return NULL; + } + tok = LDAP_UTF8PREV(sp); + + /* Scan token; roughly, sp += strcspn(sp, brk) + * Note that brk must be 0-terminated; we stop if we see that, too. + */ + while (1) { + sc = LDAP_UTF8GETC(sp); + bp = brk; + do { + if ((bc = LDAP_UTF8GETCC(bp)) == sc) { + if (sc == 0) { + *next = NULL; + } else { + *next = sp; + *(LDAP_UTF8PREV(sp)) = 0; + } + return tok; + } + } while (bc != 0); + } + /* NOTREACHED */ +} + +int +ldap_utf8isalnum( char* s ) +{ + register unsigned char c = *(unsigned char*)s; + if (0x80 & c) return 0; + if (c >= 'A' && c <= 'Z') return 1; + if (c >= 'a' && c <= 'z') return 1; + if (c >= '0' && c <= '9') return 1; + return 0; +} + +int +ldap_utf8isalpha( char* s ) +{ + register unsigned char c = *(unsigned char*)s; + if (0x80 & c) return 0; + if (c >= 'A' && c <= 'Z') return 1; + if (c >= 'a' && c <= 'z') return 1; + return 0; +} + +int +ldap_utf8isdigit( char* s ) +{ + register unsigned char c = *(unsigned char*)s; + if (0x80 & c) return 0; + if (c >= '0' && c <= '9') return 1; + return 0; +} + +int +ldap_utf8isxdigit( char* s ) +{ + register unsigned char c = *(unsigned char*)s; + if (0x80 & c) return 0; + if (c >= '0' && c <= '9') return 1; + if (c >= 'A' && c <= 'F') return 1; + if (c >= 'a' && c <= 'f') return 1; + return 0; +} + +int +ldap_utf8isspace( char* s ) +{ + register unsigned char *c = (unsigned char*)s; + int len = ldap_utf8len(s); + + if (len == 0) { + return 0; + } else if (len == 1) { + switch (*c) { + case 0x09: + case 0x0A: + case 0x0B: + case 0x0C: + case 0x0D: + case 0x20: + return 1; + default: + return 0; + } + } else if (len == 2) { + if (*c == 0xc2) { + return *(c+1) == 0x80; + } + } else if (len == 3) { + if (*c == 0xE2) { + c++; + if (*c == 0x80) { + c++; + return (*c>=0x80 && *c<=0x8a); + } + } else if (*c == 0xE3) { + return (*(c+1)==0x80) && (*(c+2)==0x80); + } else if (*c==0xEF) { + return (*(c+1)==0xBB) && (*(c+2)==0xBF); + } + return 0; + } + + /* should never reach here */ + return 0; +} + +#endif /* USE_OPENLDAP */ |