Libraries: Move to Userland/Libraries/

3 files changed, 337 insertions, 0 deletions

diff --git a/Userland/Libraries/LibTextCodec/CMakeLists.txt b/Userland/Libraries/LibTextCodec/CMakeLists.txt
new file mode 100644
index 0000000000..f99a6caa03
--- /dev/null
+++ b/Userland/Libraries/LibTextCodec/CMakeLists.txt
@@ -0,0 +1,6 @@
+set(SOURCES
+    Decoder.cpp
+)
+
+serenity_lib(LibTextCodec textcodec)
+target_link_libraries(LibTextCodec LibC)
diff --git a/Userland/Libraries/LibTextCodec/Decoder.cpp b/Userland/Libraries/LibTextCodec/Decoder.cpp
new file mode 100644
index 0000000000..6d4f2790f0
--- /dev/null
+++ b/Userland/Libraries/LibTextCodec/Decoder.cpp
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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 DAMAGE.
+ */
+
+#include <AK/String.h>
+#include <AK/StringBuilder.h>
+#include <LibTextCodec/Decoder.h>
+
+namespace TextCodec {
+
+namespace {
+Latin1Decoder& latin1_decoder()
+{
+    static Latin1Decoder* decoder;
+    if (!decoder)
+        decoder = new Latin1Decoder;
+    return *decoder;
+}
+
+UTF8Decoder& utf8_decoder()
+{
+    static UTF8Decoder* decoder;
+    if (!decoder)
+        decoder = new UTF8Decoder;
+    return *decoder;
+}
+
+Latin2Decoder& latin2_decoder()
+{
+    static Latin2Decoder* decoder = nullptr;
+    if (!decoder)
+        decoder = new Latin2Decoder;
+    return *decoder;
+}
+
+}
+
+Decoder* decoder_for(const String& a_encoding)
+{
+    auto encoding = get_standardized_encoding(a_encoding);
+    if (encoding.equals_ignoring_case("windows-1252"))
+        return &latin1_decoder();
+    if (encoding.equals_ignoring_case("utf-8"))
+        return &utf8_decoder();
+    if (encoding.equals_ignoring_case("iso-8859-2"))
+        return &latin2_decoder();
+    dbgln("TextCodec: No decoder implemented for encoding '{}'", a_encoding);
+    return nullptr;
+}
+
+// https://encoding.spec.whatwg.org/#concept-encoding-get
+String get_standardized_encoding(const String& encoding)
+{
+    String trimmed_lowercase_encoding = encoding.trim_whitespace().to_lowercase();
+
+    if (trimmed_lowercase_encoding.is_one_of("unicode-1-1-utf-8", "unicode11utf8", "unicode20utf8", "utf-8", "utf8", "x-unicode20utf8"))
+        return "UTF-8";
+    if (trimmed_lowercase_encoding.is_one_of("866", "cp866", "csibm866", "ibm666"))
+        return "IBM666";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatin2", "iso-8859-2", "iso-ir-101", "iso8859-2", "iso88592", "iso_8859-2", "iso_8859-2:1987", "l2", "latin2"))
+        return "ISO-8859-2";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatin3", "iso-8859-3", "iso-ir-109", "iso8859-3", "iso88593", "iso_8859-3", "iso_8859-3:1988", "l3", "latin3"))
+        return "ISO-8859-3";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatin4", "iso-8859-4", "iso-ir-110", "iso8859-4", "iso88594", "iso_8859-4", "iso_8859-4:1989", "l4", "latin4"))
+        return "ISO-8859-4";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatincyrillic", "cyrillic", "iso-8859-5", "iso-ir-144", "iso8859-5", "iso88595", "iso_8859-5", "iso_8859-5:1988"))
+        return "ISO-8859-5";
+    if (trimmed_lowercase_encoding.is_one_of("arabic", "asmo-708", "csiso88596e", "csiso88596i", "csisolatinarabic", "ecma-114", "iso-8859-6", "iso-8859-6-e", "iso-8859-6-i", "iso-ir-127", "iso8859-6", "iso88596", "iso_8859-6", "iso_8859-6:1987"))
+        return "ISO-8859-6";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatingreek", "ecma-118", "elot_928", "greek", "greek8", "iso-8859-7", "iso-ir-126", "iso8859-7", "iso88597", "iso_8859-7", "iso_8859-7:1987", "sun_eu_greek"))
+        return "ISO-8859-7";
+    if (trimmed_lowercase_encoding.is_one_of("csiso88598e", "csisolatinhebrew", "hebrew", "iso-8859-8", "iso-8859-8-e", "iso-ir-138", "iso8859-8", "iso88598", "iso_8859-8", "iso_8859-8:1988", "visual"))
+        return "ISO-8859-8";
+    if (trimmed_lowercase_encoding.is_one_of("csiso88598i", "iso-8859-8-i", "logical"))
+        return "ISO-8859-8-I";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatin6", "iso8859-10", "iso-ir-157", "iso8859-10", "iso885910", "l6", "latin6"))
+        return "ISO-8859-10";
+    if (trimmed_lowercase_encoding.is_one_of("iso-8859-13", "iso8859-13", "iso885913"))
+        return "ISO-8859-13";
+    if (trimmed_lowercase_encoding.is_one_of("iso-8859-14", "iso8859-14", "iso885914"))
+        return "ISO-8859-14";
+    if (trimmed_lowercase_encoding.is_one_of("csisolatin9", "iso-8859-15", "iso8859-15", "iso885915", "iso_8859-15", "l9"))
+        return "ISO-8859-15";
+    if (trimmed_lowercase_encoding == "iso-8859-16")
+        return "ISO-8859-16";
+    if (trimmed_lowercase_encoding.is_one_of("cskoi8r", "koi", "koi8", "koi8-r", "koi8_r"))
+        return "KOI8-R";
+    if (trimmed_lowercase_encoding.is_one_of("koi8-ru", "koi8-u"))
+        return "KOI8-U";
+    if (trimmed_lowercase_encoding.is_one_of("csmacintosh", "mac", "macintosh", "x-mac-roman"))
+        return "macintosh";
+    if (trimmed_lowercase_encoding.is_one_of("dos-874", "iso-8859-11", "iso8859-11", "iso885911", "tis-620", "windows-874"))
+        return "windows-874";
+    if (trimmed_lowercase_encoding.is_one_of("cp1250", "windows-1250", "x-cp1250"))
+        return "windows-1250";
+    if (trimmed_lowercase_encoding.is_one_of("cp1251", "windows-1251", "x-cp1251"))
+        return "windows-1251";
+    if (trimmed_lowercase_encoding.is_one_of("ansi_x3.4-1968", "ascii", "cp1252", "cp819", "csisolatin1", "ibm819", "iso-8859-1", "iso-ir-100", "iso8859-1", "iso88591", "iso_8859-1", "iso_8859-1:1987", "l1", "latin1", "us-ascii", "windows-1252", "x-cp1252"))
+        return "windows-1252";
+    if (trimmed_lowercase_encoding.is_one_of("cp1253", "windows-1253", "x-cp1253"))
+        return "windows-1253";
+    if (trimmed_lowercase_encoding.is_one_of("cp1254", "csisolatin5", "iso-8859-9", "iso-ir-148", "iso-8859-9", "iso-88599", "iso_8859-9", "iso_8859-9:1989", "l5", "latin5", "windows-1254", "x-cp1254"))
+        return "windows-1254";
+    if (trimmed_lowercase_encoding.is_one_of("cp1255", "windows-1255", "x-cp1255"))
+        return "windows-1255";
+    if (trimmed_lowercase_encoding.is_one_of("cp1256", "windows-1256", "x-cp1256"))
+        return "windows-1256";
+    if (trimmed_lowercase_encoding.is_one_of("cp1257", "windows-1257", "x-cp1257"))
+        return "windows-1257";
+    if (trimmed_lowercase_encoding.is_one_of("cp1258", "windows-1258", "x-cp1258"))
+        return "windows-1258";
+    if (trimmed_lowercase_encoding.is_one_of("x-mac-cyrillic", "x-mac-ukrainian"))
+        return "x-mac-cyrillic";
+    if (trimmed_lowercase_encoding.is_one_of("chinese", "csgb2312", "csiso58gb231280", "gb2312", "gb_2312", "gb_2312-80", "gbk", "iso-ir-58", "x-gbk"))
+        return "GBK";
+    if (trimmed_lowercase_encoding == "gb18030")
+        return "gb18030";
+    if (trimmed_lowercase_encoding.is_one_of("big5", "big5-hkscs", "cn-big5", "csbig5", "x-x-big5"))
+        return "Big5";
+    if (trimmed_lowercase_encoding.is_one_of("cseucpkdfmtjapanese", "euc-jp", "x-euc-jp"))
+        return "EUC-JP";
+    if (trimmed_lowercase_encoding.is_one_of("csiso2022jp", "iso-2022-jp"))
+        return "ISO-2022-JP";
+    if (trimmed_lowercase_encoding.is_one_of("csshiftjis", "ms932", "ms_kanji", "shift-jis", "shift_jis", "sjis", "windows-31j", "x-sjis"))
+        return "Shift_JIS";
+    if (trimmed_lowercase_encoding.is_one_of("cseuckr", "csksc56011987", "euc-kr", "iso-ir-149", "korean", "ks_c_5601-1987", "ks_c_5601-1989", "ksc5601", "ksc_5601", "windows-949"))
+        return "EUC-KR";
+    if (trimmed_lowercase_encoding.is_one_of("csiso2022kr", "hz-gb-2312", "iso-2022-cn", "iso-2022-cn-ext", "iso-2022-kr", "replacement"))
+        return "replacement";
+    if (trimmed_lowercase_encoding.is_one_of("unicodefffe", "utf-16be"))
+        return "UTF-16BE";
+    if (trimmed_lowercase_encoding.is_one_of("csunicode", "iso-10646-ucs-2", "ucs-2", "unicode", "unicodefeff", "utf-16", "utf-16le"))
+        return "UTF-16LE";
+    if (trimmed_lowercase_encoding == "x-user-defined")
+        return "x-user-defined";
+
+    dbg() << "TextCodec: Unrecognized encoding: " << encoding;
+    return {};
+}
+
+bool is_standardized_encoding(const String& encoding)
+{
+    auto lowercase_encoding = encoding.to_lowercase();
+    return lowercase_encoding.is_one_of("utf-8", "ibm666", "iso-8859-2", "iso-8859-3", "iso-8859-4", "iso-8859-5", "iso-8859-6", "iso-8859-7", "iso-8859-8", "iso-8859-8-I", "iso-8859-10", "iso-8859-13", "iso-8859-14", "iso-8859-15", "iso-8859-16", "koi8-r", "koi8-u", "macintosh", "windows-874", "windows-1250", "windows-1251", "windows-1252", "windows-1253", "windows-1254", "windows-1255", "windows-1256", "windows-1257", "windows-1258", "x-mac-cyrillic", "gbk", "gb18030", "big5", "euc-jp", "iso-2022-JP", "shift_jis", "euc-kr", "replacement", "utf-16be", "utf-16le", "x-user-defined");
+}
+
+String UTF8Decoder::to_utf8(const StringView& input)
+{
+    return input;
+}
+
+String Latin1Decoder::to_utf8(const StringView& input)
+{
+    StringBuilder builder(input.length());
+    for (size_t i = 0; i < input.length(); ++i) {
+        u8 ch = input[i];
+        // Latin1 is the same as the first 256 Unicode code_points, so no mapping is needed, just utf-8 encoding.
+        builder.append_code_point(ch);
+    }
+    return builder.to_string();
+}
+
+namespace {
+u32 convert_latin2_to_utf8(u8 in)
+{
+    switch (in) {
+
+#define MAP(X, Y) \
+    case X:       \
+        return Y
+
+        MAP(0xA1, 0x104);
+        MAP(0xA2, 0x2D8);
+        MAP(0xA3, 0x141);
+        MAP(0xA5, 0x13D);
+        MAP(0xA6, 0x15A);
+        MAP(0xA9, 0x160);
+        MAP(0xAA, 0x15E);
+        MAP(0xAB, 0x164);
+        MAP(0xAC, 0x179);
+        MAP(0xAE, 0x17D);
+        MAP(0xAF, 0x17B);
+
+        MAP(0xB1, 0x105);
+        MAP(0xB2, 0x2DB);
+        MAP(0xB3, 0x142);
+        MAP(0xB5, 0x13E);
+        MAP(0xB6, 0x15B);
+        MAP(0xB7, 0x2C7);
+        MAP(0xB9, 0x161);
+        MAP(0xBA, 0x15F);
+        MAP(0xBB, 0x165);
+        MAP(0xBC, 0x17A);
+        MAP(0xBD, 0x2DD);
+        MAP(0xBE, 0x17E);
+        MAP(0xBF, 0x17C);
+
+        MAP(0xC0, 0x154);
+        MAP(0xC3, 0x102);
+        MAP(0xC5, 0x139);
+        MAP(0xC6, 0x106);
+        MAP(0xC8, 0x10C);
+        MAP(0xCA, 0x118);
+        MAP(0xCC, 0x11A);
+        MAP(0xCF, 0x10E);
+
+        MAP(0xD0, 0x110);
+        MAP(0xD1, 0x143);
+        MAP(0xD2, 0x147);
+        MAP(0xD5, 0x150);
+        MAP(0xD8, 0x158);
+        MAP(0xD9, 0x16E);
+        MAP(0xDB, 0x170);
+        MAP(0xDE, 0x162);
+
+        MAP(0xE0, 0x155);
+        MAP(0xE3, 0x103);
+        MAP(0xE5, 0x13A);
+        MAP(0xE6, 0x107);
+        MAP(0xE8, 0x10D);
+        MAP(0xEA, 0x119);
+        MAP(0xEC, 0x11B);
+        MAP(0xEF, 0x10F);
+
+        MAP(0xF0, 0x111);
+        MAP(0xF1, 0x144);
+        MAP(0xF2, 0x148);
+        MAP(0xF5, 0x151);
+        MAP(0xF8, 0x159);
+        MAP(0xF9, 0x16F);
+        MAP(0xFB, 0x171);
+        MAP(0xFE, 0x163);
+        MAP(0xFF, 0x2D9);
+#undef MAP
+
+    default:
+        return in;
+    }
+}
+}
+
+String Latin2Decoder::to_utf8(const StringView& input)
+{
+    StringBuilder builder(input.length());
+    for (auto c : input) {
+        builder.append_code_point(convert_latin2_to_utf8(c));
+    }
+
+    return builder.to_string();
+}
+
+}
diff --git a/Userland/Libraries/LibTextCodec/Decoder.h b/Userland/Libraries/LibTextCodec/Decoder.h
new file mode 100644
index 0000000000..84dd388ea5
--- /dev/null
+++ b/Userland/Libraries/LibTextCodec/Decoder.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright notice, this
+ *    list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright notice,
+ *    this list of conditions and the following disclaimer in the documentation
+ *    and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "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 THE COPYRIGHT HOLDER OR CONTRIBUTORS 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 DAMAGE.
+ */
+
+#pragma once
+
+#include <AK/Forward.h>
+
+namespace TextCodec {
+
+class Decoder {
+public:
+    virtual String to_utf8(const StringView&) = 0;
+};
+
+class UTF8Decoder final : public Decoder {
+public:
+    virtual String to_utf8(const StringView&) override;
+};
+
+class Latin1Decoder final : public Decoder {
+public:
+    virtual String to_utf8(const StringView&) override;
+};
+
+class Latin2Decoder final : public Decoder {
+public:
+    virtual String to_utf8(const StringView&) override;
+};
+
+Decoder* decoder_for(const String& encoding);
+String get_standardized_encoding(const String& encoding);
+bool is_standardized_encoding(const String& encoding);
+
+}