mirror of
https://gitlab.isc.org/isc-projects/bind9
synced 2025-08-24 11:08:45 +00:00
58bd26b6cf
This commit converts the license handling to adhere to the REUSE specification. It specifically: 1. Adds used licnses to LICENSES/ directory 2. Add "isc" template for adding the copyright boilerplate 3. Changes all source files to include copyright and SPDX license header, this includes all the C sources, documentation, zone files, configuration files. There are notes in the doc/dev/copyrights file on how to add correct headers to the new files. 4. Handle the rest that can't be modified via .reuse/dep5 file. The binary (or otherwise unmodifiable) files could have license places next to them in <foo>.license file, but this would lead to cluttered repository and most of the files handled in the .reuse/dep5 file are system test files.
89 lines
2.2 KiB
C
89 lines
2.2 KiB
C
/*
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* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
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*
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* SPDX-License-Identifier: MPL-2.0
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, you can obtain one at https://mozilla.org/MPL/2.0/.
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*
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* See the COPYRIGHT file distributed with this work for additional
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* information regarding copyright ownership.
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*/
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#include <string.h>
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#include <isc/utf8.h>
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#include <isc/util.h>
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/*
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* UTF-8 is defined in "The Unicode Standard -- Version 4.0"
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* Also see RFC 3629.
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*
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* Char. number range | UTF-8 octet sequence
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* (hexadecimal) | (binary)
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* --------------------+---------------------------------------------
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* 0000 0000-0000 007F | 0xxxxxxx
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* 0000 0080-0000 07FF | 110xxxxx 10xxxxxx
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* 0000 0800-0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
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* 0001 0000-0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
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*/
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bool
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isc_utf8_valid(const unsigned char *buf, size_t len) {
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REQUIRE(buf != NULL);
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for (size_t i = 0; i < len; i++) {
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if (buf[i] <= 0x7f) {
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continue;
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}
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if ((i + 1) < len && (buf[i] & 0xe0) == 0xc0 &&
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(buf[i + 1] & 0xc0) == 0x80) {
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unsigned int w;
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w = (buf[i] & 0x1f) << 6;
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w |= (buf[++i] & 0x3f);
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if (w < 0x80) {
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return (false);
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}
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continue;
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}
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if ((i + 2) < len && (buf[i] & 0xf0) == 0xe0 &&
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(buf[i + 1] & 0xc0) == 0x80 && (buf[i + 2] & 0xc0) == 0x80)
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{
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unsigned int w;
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w = (buf[i] & 0x0f) << 12;
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w |= (buf[++i] & 0x3f) << 6;
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w |= (buf[++i] & 0x3f);
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if (w < 0x0800) {
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return (false);
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}
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continue;
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}
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if ((i + 3) < len && (buf[i] & 0xf8) == 0xf0 &&
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(buf[i + 1] & 0xc0) == 0x80 &&
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(buf[i + 2] & 0xc0) == 0x80 && (buf[i + 3] & 0xc0) == 0x80)
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{
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unsigned int w;
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w = (buf[i] & 0x07) << 18;
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w |= (buf[++i] & 0x3f) << 12;
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w |= (buf[++i] & 0x3f) << 6;
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w |= (buf[++i] & 0x3f);
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if (w < 0x10000 || w > 0x10FFFF) {
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return (false);
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}
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continue;
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}
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return (false);
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}
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return (true);
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}
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bool
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isc_utf8_bom(const unsigned char *buf, size_t len) {
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REQUIRE(buf != NULL);
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if (len >= 3U && !memcmp(buf, "\xef\xbb\xbf", 3)) {
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return (true);
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}
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return (false);
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}
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