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// Copyright (c) 2017-2025 Cloudflare, Inc.
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// Licensed under the Apache 2.0 license found in the LICENSE file or at:
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//     https://opensource.org/licenses/Apache-2.0
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#pragma once
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#include <kj/common.h>
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#include <kj/parse/char.h>
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#include <kj/string.h>
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namespace workerd::util {
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inline bool isValidHeaderValue(kj::ArrayPtr<const char> value) {
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  if (value == nullptr) return true;
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  for (auto c: value) {
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    if (c == '\0' || c == '\r' || c == '\n') {
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      return false;
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    }
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  }
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  return true;
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}
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constexpr auto HTTP_SEPARATOR_CHARS = kj::parse::anyOfChars("()<>@,;:\\\"/[]?={} \t");
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// RFC2616 section 2.2: https://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2
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constexpr auto HTTP_TOKEN_CHARS = kj::parse::controlChar.orChar('\x7f')
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                                      .orGroup(kj::parse::whitespaceChar)
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                                      .orGroup(HTTP_SEPARATOR_CHARS)
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                                      .invert();
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// RFC2616 section 2.2: https://www.w3.org/Protocols/rfc2616/rfc2616-sec2.html#sec2.2
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// RFC2616 section 4.2: https://www.w3.org/Protocols/rfc2616/rfc2616-sec4.html#sec4.2
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inline constexpr bool isHttpWhitespace(char c) {
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  return c == '\t' || c == '\r' || c == '\n' || c == ' ';
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}
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static_assert(isHttpWhitespace(' '));
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static_assert(!isHttpWhitespace('A'));
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inline constexpr bool isHttpTokenChar(char c) {
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  return HTTP_TOKEN_CHARS.contains(c);
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}
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static_assert(isHttpTokenChar('A'));
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static_assert(!isHttpTokenChar(' '));
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}  // namespace workerd::util