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fs: update + consolidate path normalization logic

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Michael Scire 2020-12-06 19:56:45 -08:00
parent 5ef93778f6
commit 32803d9920
22 changed files with 1007 additions and 463 deletions
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154
libraries/libvapours/source/util/util_character_encoding.cpp Normal file
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/*
* Copyright (c) 2018-2020 Atmosphère-NX
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope 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, see <http://www.gnu.org/licenses/>.
*/
#include <vapours.hpp>
namespace ams::util {
namespace {
constexpr inline int8_t Utf8NBytesInnerTable[0x100 + 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, 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, 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, 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, 1, 1,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8,
};
constexpr inline const char * const Utf8NBytesTable = static_cast<const char *>(static_cast<const void *>(Utf8NBytesInnerTable + 1));
}
CharacterEncodingResult ConvertCharacterUtf8ToUtf32(u32 *dst, const char *src) {
/* Check pre-conditions. */
AMS_ASSERT(dst != nullptr);
AMS_ASSERT(src != nullptr);
/* Perform the conversion. */
const unsigned char *p = reinterpret_cast<const unsigned char *>(src);
switch (Utf8NBytesTable[p[0]]) {
case 1:
*dst = static_cast<u32>(p[0]);
return CharacterEncodingResult_Success;
case 2:
if ((p[0] & 0x1E) != 0) {
if (Utf8NBytesTable[p[1]] == 0) {
*dst = (static_cast<uint32_t>(p[0] & 0x1F) << 6) | (static_cast<uint32_t>(p[1] & 0x3F) << 0);
return CharacterEncodingResult_Success;
}
}
break;
case 3:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0) {
const u32 c = (static_cast<uint32_t>(p[0] & 0xF) << 12) | (static_cast<uint32_t>(p[1] & 0x3F) << 6) | (static_cast<uint32_t>(p[2] & 0x3F) << 0);
if ((c & 0xF800) != 0 && (c & 0xF800) != 0xD800) {
*dst = c;
return CharacterEncodingResult_Success;
}
}
return CharacterEncodingResult_InvalidFormat;
case 4:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0 && Utf8NBytesTable[p[3]] == 0) {
const u32 c = (static_cast<uint32_t>(p[0] & 0x7) << 18) | (static_cast<uint32_t>(p[1] & 0x3F) << 12) | (static_cast<uint32_t>(p[2] & 0x3F) << 6) | (static_cast<uint32_t>(p[3] & 0x3F) << 0);
if (c >= 0x10000 && c < 0x110000) {
*dst = c;
return CharacterEncodingResult_Success;
}
}
return CharacterEncodingResult_InvalidFormat;
default:
break;
}
/* We failed to convert. */
return CharacterEncodingResult_InvalidFormat;
}
CharacterEncodingResult PickOutCharacterFromUtf8String(char *dst, const char **str) {
/* Check pre-conditions. */
AMS_ASSERT(dst != nullptr);
AMS_ASSERT(str != nullptr);
AMS_ASSERT(*str != nullptr);
/* Clear the output. */
dst[0] = 0;
dst[1] = 0;
dst[2] = 0;
dst[3] = 0;
/* Perform the conversion. */
const unsigned char *p = reinterpret_cast<const unsigned char *>(*str);
u32 c = *p;
switch (Utf8NBytesTable[c]) {
case 1:
dst[0] = (*str)[0];
++(*str);
break;
case 2:
if ((p[0] & 0x1E) != 0) {
if (Utf8NBytesTable[p[1]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0x1F) << 6) | (static_cast<uint32_t>(p[1] & 0x3F) << 0);
dst[0] = (*str)[0];
dst[1] = (*str)[1];
(*str) += 2;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
case 3:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0xF) << 12) | (static_cast<uint32_t>(p[1] & 0x3F) << 6) | (static_cast<uint32_t>(p[2] & 0x3F) << 0);
if ((c & 0xF800) != 0 && (c & 0xF800) != 0xD800) {
dst[0] = (*str)[0];
dst[1] = (*str)[1];
dst[2] = (*str)[2];
(*str) += 3;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
case 4:
if (Utf8NBytesTable[p[1]] == 0 && Utf8NBytesTable[p[2]] == 0 && Utf8NBytesTable[p[3]] == 0) {
c = (static_cast<uint32_t>(p[0] & 0x7) << 18) | (static_cast<uint32_t>(p[1] & 0x3F) << 12) | (static_cast<uint32_t>(p[2] & 0x3F) << 6) | (static_cast<uint32_t>(p[3] & 0x3F) << 0);
if (c >= 0x10000 && c < 0x110000) {
dst[0] = (*str)[0];
dst[1] = (*str)[1];
dst[2] = (*str)[2];
dst[3] = (*str)[3];
(*str) += 4;
break;
}
}
return CharacterEncodingResult_InvalidFormat;
default:
return CharacterEncodingResult_InvalidFormat;
}
return CharacterEncodingResult_Success;
}
}