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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
// This is a copy of url/url_canon_internal.h circa 2023. It should be used only
// by components/feedback/redaction_tool/. We need a copy because the
// components/feedback/redaction_tool source code is shared into ChromeOS and
// needs to have no dependencies outside of base/.
#ifndef COMPONENTS_FEEDBACK_REDACTION_TOOL_URL_CANON_INTERNAL_H_
#define COMPONENTS_FEEDBACK_REDACTION_TOOL_URL_CANON_INTERNAL_H_
// This file is intended to be included in another C++ file where the character
// types are defined. This allows us to write mostly generic code, but not have
// template bloat because everything is inlined when anybody calls any of our
// functions.
#include <stddef.h>
#include <stdlib.h>
#include "components/feedback/redaction_tool/url_canon.h"
namespace redaction_internal {
// Character type handling -----------------------------------------------------
// Bits that identify different character types. These types identify different
// bits that are set for each 8-bit character in the kSharedCharTypeTable.
enum SharedCharTypes {
// Characters that do not require escaping in queries. Characters that do
// not have this flag will be escaped; see url_canon_query.cc
CHAR_QUERY = 1,
// Valid in the username/password field.
CHAR_USERINFO = 2,
// Valid in a IPv4 address (digits plus dot and 'x' for hex).
CHAR_IPV4 = 4,
// Valid in an ASCII-representation of a hex digit (as in %-escaped).
CHAR_HEX = 8,
// Valid in an ASCII-representation of a decimal digit.
CHAR_DEC = 16,
// Valid in an ASCII-representation of an octal digit.
CHAR_OCT = 32,
// Characters that do not require escaping in encodeURIComponent. Characters
// that do not have this flag will be escaped; see url_util.cc.
CHAR_COMPONENT = 64,
};
// This table contains the flags in SharedCharTypes for each 8-bit character.
// Some canonicalization functions have their own specialized lookup table.
// For those with simple requirements, we have collected the flags in one
// place so there are fewer lookup tables to load into the CPU cache.
//
// Using an unsigned char type has a small but measurable performance benefit
// over using a 32-bit number.
extern const unsigned char kSharedCharTypeTable[0x100];
// More readable wrappers around the character type lookup table.
inline bool IsCharOfType(unsigned char c, SharedCharTypes type) {
return !!(kSharedCharTypeTable[c] & type);
}
inline bool IsQueryChar(unsigned char c) {
return IsCharOfType(c, CHAR_QUERY);
}
inline bool IsIPv4Char(unsigned char c) {
return IsCharOfType(c, CHAR_IPV4);
}
inline bool IsHexChar(unsigned char c) {
return IsCharOfType(c, CHAR_HEX);
}
inline bool IsComponentChar(unsigned char c) {
return IsCharOfType(c, CHAR_COMPONENT);
}
#ifndef WIN32
// Implementations of Windows' int-to-string conversions
int _itoa_s(int value, char* buffer, size_t size_in_chars, int radix);
// Secure template overloads for these functions
template <size_t N>
inline int _itoa_s(int value, char (&buffer)[N], int radix) {
return _itoa_s(value, buffer, N, radix);
}
// _strtoui64 and strtoull behave the same
inline uint64_t _strtoui64(const char* nptr, char** endptr, int base) {
return strtoull(nptr, endptr, base);
}
#endif // WIN32
} // namespace redaction_internal
#endif // COMPONENTS_FEEDBACK_REDACTION_TOOL_URL_CANON_INTERNAL_H_
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