diff options
Diffstat (limited to 'contrib/idn/idnkit-1.0-src/tools/idnconv/selectiveencode.c')
| -rw-r--r-- | contrib/idn/idnkit-1.0-src/tools/idnconv/selectiveencode.c | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/contrib/idn/idnkit-1.0-src/tools/idnconv/selectiveencode.c b/contrib/idn/idnkit-1.0-src/tools/idnconv/selectiveencode.c new file mode 100644 index 0000000..ae509df --- /dev/null +++ b/contrib/idn/idnkit-1.0-src/tools/idnconv/selectiveencode.c @@ -0,0 +1,127 @@ +#ifndef lint +static char *rcsid = "$Id: selectiveencode.c,v 1.1.1.1 2003/06/04 00:27:07 marka Exp $"; +#endif + +/* + * Copyright (c) 2000,2002 Japan Network Information Center. + * All rights reserved. + * + * By using this file, you agree to the terms and conditions set forth bellow. + * + * LICENSE TERMS AND CONDITIONS + * + * The following License Terms and Conditions apply, unless a different + * license is obtained from Japan Network Information Center ("JPNIC"), + * a Japanese association, Kokusai-Kougyou-Kanda Bldg 6F, 2-3-4 Uchi-Kanda, + * Chiyoda-ku, Tokyo 101-0047, Japan. + * + * 1. Use, Modification and Redistribution (including distribution of any + * modified or derived work) in source and/or binary forms is permitted + * under this License Terms and Conditions. + * + * 2. Redistribution of source code must retain the copyright notices as they + * appear in each source code file, this License Terms and Conditions. + * + * 3. Redistribution in binary form must reproduce the Copyright Notice, + * this License Terms and Conditions, in the documentation and/or other + * materials provided with the distribution. For the purposes of binary + * distribution the "Copyright Notice" refers to the following language: + * "Copyright (c) 2000-2002 Japan Network Information Center. All rights reserved." + * + * 4. The name of JPNIC may not be used to endorse or promote products + * derived from this Software without specific prior written approval of + * JPNIC. + * + * 5. Disclaimer/Limitation of Liability: THIS SOFTWARE IS PROVIDED BY JPNIC + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A + * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JPNIC BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR + * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, + * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR + * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF + * ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. + */ + +#include <config.h> + +#include <stddef.h> + +#include <idn/assert.h> +#include <idn/logmacro.h> +#include <idn/result.h> +#include <idn/utf8.h> +#include <idn/debug.h> + +#include "selectiveencode.h" + +static int is_domain_delimiter(char c); +static char *find_nonascii(const char *s); + +idn_result_t +idn_selectiveencode_findregion(const char *s, + char **startp, char **endp) +{ + char *non_ascii; + char *start, *end; + + assert(s != NULL && startp != NULL && endp != NULL); + + TRACE(("idn_selectiveencode_findregion(s=\"%s\")\n", + idn__debug_xstring(s, 20))); + + /* + * Scan the specified string looking for non-ascii character. + */ + if ((non_ascii = find_nonascii(s)) == NULL) + return (idn_notfound); + + /* + * Non-ascii character found. + * Determine the region to encode. + */ + + /* + * First, we scan backwards to find the beginning of the region + * that should be converted. + */ + start = non_ascii; + while (start > s) { + char *prev = idn_utf8_findfirstbyte(start - 1, s); + if (is_domain_delimiter(*prev)) + break; /* Found */ + start = prev; + } + *startp = start; + + /* + * Next we scan forwards looking for the end of the region. + */ + end = non_ascii + idn_utf8_mblen(non_ascii); + while (!is_domain_delimiter(*end)) + end += idn_utf8_mblen(end); + *endp = end; + + return (idn_success); +} + +static int +is_domain_delimiter(char c) { + return ((unsigned char)c < 0x80 && + !('A' <= c && c <= 'Z') && + !('a' <= c && c <= 'z') && + !('0' <= c && c <= '9') && + c != '-' && c != '.'); +} + +static char * +find_nonascii(const char *s) { + while (*s != '\0' && (unsigned char)*s < 0x80) + s++; + if (*s == '\0') + return (NULL); + else + return ((char *)s); +} |