Add support for parsing zip archives.

Also add unit tests for test it.

8 files changed, 409 insertions, 8 deletions

diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index b70bf269d..91fc76c9f 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -897,6 +897,9 @@ SET(SRCS
     fs/virtlist.h
     fs/virtfs.cpp
     fs/virtfs.h
+    fs/zip.cpp
+    fs/zip.h
+    fs/ziplocalheader.h
     utils/process.cpp
     utils/process.h
     utils/sdl2helper.cpp
@@ -1787,6 +1790,9 @@ SET(DYE_CMD_SRCS
     fs/virtlist.h
     fs/virtfs.cpp
     fs/virtfs.h
+    fs/zip.cpp
+    fs/zip.h
+    fs/ziplocalheader.h
     utils/sdl2helper.cpp
     utils/sdl2helper.h
     utils/sdlcheckutils.cpp
diff --git a/src/Makefile.am b/src/Makefile.am
index 6c9b56543..2b53079f1 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -561,6 +561,9 @@ BASE_SRC += events/actionevent.h \
 	      fs/virtlist.h \
 	      fs/virtfs.cpp \
 	      fs/virtfs.h \
+	      fs/zip.cpp \
+	      fs/zip.h \
+	      fs/ziplocalheader.h \
 	      utils/process.cpp \
 	      utils/process.h \
 	      utils/sdl2helper.cpp \
@@ -1924,6 +1927,7 @@ manaplustests_SOURCES = ${SRC} \
 	      utils/dumplibs_unittest.cc \
 	      utils/checkutils_unittest.cc \
 	      fs/virtfs_unittest.cc \
+	      fs/zip_unittest.cc \
 	      fs/virtfsdir_unittest.cc \
 	      utils/xml_unittest.cc \
 	      utils/timer_unittest.cc \
diff --git a/src/fs/virtfs_unittest.cc b/src/fs/virtfs_unittest.cc
index b26381f08..a79f01aee 100644
--- a/src/fs/virtfs_unittest.cc
+++ b/src/fs/virtfs_unittest.cc
@@ -115,8 +115,8 @@ TEST_CASE("VirtFs enumerateFiles1")
 
     VirtList *list = nullptr;
 
-    const int cnt1 = VirtFs::exists("test/test2.txt") ? 24 : 23;
-    const int cnt2 = 24;
+    const int cnt1 = VirtFs::exists("test/test2.txt") ? 27 : 26;
+    const int cnt2 = 27;
 
     VirtFs::permitLinks(false);
     list = VirtFs::enumerateFiles("test");
@@ -363,8 +363,8 @@ TEST_CASE("VirtFs permitLinks")
     VirtFs::addDirToSearchPath("data", Append_false);
     VirtFs::addDirToSearchPath("../data", Append_false);
 
-    const int cnt1 = VirtFs::exists("test/test2.txt") ? 22 : 21;
-    const int cnt2 = 22;
+    const int cnt1 = VirtFs::exists("test/test2.txt") ? 25 : 24;
+    const int cnt2 = 25;
 
     StringVect list;
     VirtFs::permitLinks(false);
diff --git a/src/fs/virtfsdir_unittest.cc b/src/fs/virtfsdir_unittest.cc
index 91c573f61..df596712b 100644
--- a/src/fs/virtfsdir_unittest.cc
+++ b/src/fs/virtfsdir_unittest.cc
@@ -387,8 +387,8 @@ TEST_CASE("VirtFsDir enumerateFiles1")
 
     VirtList *list = nullptr;
 
-    const int cnt1 = VirtFsDir::exists("test/test2.txt") ? 24 : 23;
-    const int cnt2 = 24;
+    const int cnt1 = VirtFsDir::exists("test/test2.txt") ? 27 : 26;
+    const int cnt2 = 27;
 
     VirtFsDir::permitLinks(false);
     list = VirtFsDir::enumerateFiles("test");
@@ -616,8 +616,8 @@ TEST_CASE("VirtFsDir permitLinks")
         Append_false,
         SkipError_false);
 
-    const int cnt1 = VirtFsDir::exists("test/test2.txt") ? 22 : 21;
-    const int cnt2 = 22;
+    const int cnt1 = VirtFsDir::exists("test/test2.txt") ? 25 : 24;
+    const int cnt2 = 25;
 
     StringVect list;
     VirtFsDir::permitLinks(false);
diff --git a/src/fs/zip.cpp b/src/fs/zip.cpp
new file mode 100644
index 000000000..2164a4303
--- /dev/null
+++ b/src/fs/zip.cpp
@@ -0,0 +1,161 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2017  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that 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 "fs/zip.h"
+
+#include "fs/ziplocalheader.h"
+
+#include "utils/checkutils.h"
+#include "utils/stringutils.h"
+
+#include <iostream>
+#include <unistd.h>
+
+#include "debug.h"
+
+#define readVal(val, sz, msg) \
+    cnt = fread(static_cast<void*>(val), 1, sz, arcFile); \
+    if (cnt != sz) \
+    { \
+        reportAlways("Error reading " msg " in file %s", \
+            archiveName.c_str()); \
+        delete header; \
+        delete [] buf; \
+        fclose(arcFile); \
+        return false; \
+    } \
+
+namespace Zip
+{
+    bool readArchiveInfo(const std::string &restrict archiveName,
+                         std::vector<ZipLocalHeader*> &restrict headers)
+    {
+        FILE *restrict const arcFile = fopen(archiveName.c_str(),
+            "r");
+        if (arcFile == nullptr)
+        {
+            reportAlways("Can't open zip file %s",
+                archiveName.c_str());
+            return false;
+        }
+        size_t cnt = 0U;
+        uint8_t *const buf = new uint8_t[65535 + 10];
+        uint16_t val16 = 0U;
+        ZipLocalHeader *header = nullptr;
+
+        logger->log("Read archive: %s", archiveName.c_str());
+        // format source https://en.wikipedia.org/wiki/Zip_%28file_format%29
+        while (feof(arcFile) == 0)
+        {
+            // file header pointer on 0
+            // read file header signature
+            readVal(buf, 4, "zip file header");  // + 4
+            // pointer on 4
+
+            if (buf[0] == 0x50 &&
+                buf[1] == 0x4B &&
+                buf[2] == 0x03 &&
+                buf[3] == 0x04)
+            {   // local file header
+                header = new ZipLocalHeader;
+                header->archiveName = archiveName;
+                // skip useless fields
+                fseek(arcFile, 14, SEEK_CUR);  // + 14
+                // file header pointer on 18
+                readVal(&header->compressSize, 4,
+                    "zip compressed size") // + 4
+                // file header pointer on 22
+                // +++ need add endian specific decoding for val32
+                readVal(&header->uncompressSize, 4,
+                    "zip uncompressed size")  // + 4
+                // file header pointer on 26
+                // +++ need add endian specific decoding for val32
+                readVal(&val16, 2, "file name length")  // + 2
+                // file header pointer on 28
+                const uint32_t fileNameLen = CAST_U32(val16);
+                if (fileNameLen > 1000)
+                {
+                    reportAlways("Error too long file name in file %s",
+                        archiveName.c_str());
+                    delete header;
+                    delete [] buf;
+                    fclose(arcFile);
+                    return false;
+                }
+                readVal(&val16, 2, "extra field length")  // + 2
+                // file header pointer on 30
+                const uint32_t extraFieldLen = CAST_U32(val16);
+                readVal(buf, fileNameLen, "file name");
+                // file header pointer on 30 + fileNameLen
+                buf[fileNameLen] = 0;
+                header->fileName = std::string(
+                    reinterpret_cast<char*>(buf));
+                header->dataOffset = ftell(arcFile) + extraFieldLen;
+                fseek(arcFile, extraFieldLen + header->compressSize, SEEK_CUR);
+                // pointer on 30 + fileNameLen + extraFieldLen + compressSize
+                if (findLast(header->fileName, "/") == false)
+                {
+                    headers.push_back(header);
+                    logger->log(" file name: %s",
+                        header->fileName.c_str());
+                    logger->log(" compressed size: %u", header->compressSize);
+                    logger->log(" uncompressed size: %u", header->uncompressSize);
+                }
+            }
+            else if (buf[0] == 0x50 &&
+                     buf[1] == 0x4B &&
+                     buf[2] == 0x01 &&
+                     buf[3] == 0x02)
+            {   // central directory file header
+                // !!! This is quick way for read zip archives. !!!
+                // !!! It ignore modified files in archive. !!!
+                // ignoring central directory entries because all data already read.
+                break;
+            }
+            else if (buf[0] == 0x50 &&
+                     buf[1] == 0x4B &&
+                     buf[2] == 0x05 &&
+                     buf[3] == 0x06)
+            {   // end of central directory
+                // !!! This is quick way for read zip archives. !!!
+                // !!! It ignore modified files in archive. !!!
+                // ignoring central directory entries because all data already read.
+                break;
+            }
+            else
+            {
+                reportAlways("Error in header signature (0x%02x%02x%02x%02x)"
+                    " in file %s",
+                    buf[0],
+                    buf[1],
+                    buf[2],
+                    buf[3],
+                    archiveName.c_str());
+                delete [] buf;
+                fclose(arcFile);
+                return false;
+            }
+        }
+        delete [] buf;
+        fclose(arcFile);
+        return true;
+    }
+
+}  // namespace Zip
diff --git a/src/fs/zip.h b/src/fs/zip.h
new file mode 100644
index 000000000..145be5c88
--- /dev/null
+++ b/src/fs/zip.h
@@ -0,0 +1,37 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2017  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that 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/>.
+ */
+
+#ifndef UTILS_ZIP_H
+#define UTILS_ZIP_H
+
+#include "localconsts.h"
+
+#include <string>
+#include <vector>
+
+struct ZipLocalHeader;
+
+namespace Zip
+{
+    bool readArchiveInfo(const std::string &restrict archiveName,
+                         std::vector<ZipLocalHeader*> &restrict headers);
+}  // namespace Zip
+
+#endif  // UTILS_ZIP_H
diff --git a/src/fs/zip_unittest.cc b/src/fs/zip_unittest.cc
new file mode 100644
index 000000000..3f0c49cdf
--- /dev/null
+++ b/src/fs/zip_unittest.cc
@@ -0,0 +1,147 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2017  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that 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 "catch.hpp"
+
+#include "logger.h"
+
+#include "fs/files.h"
+#include "fs/zip.h"
+#include "fs/ziplocalheader.h"
+
+#include "utils/delete2.h"
+#include "utils/dtor.h"
+
+#include "debug.h"
+
+TEST_CASE("Zip readArchiveInfo")
+{
+    logger = new Logger();
+    std::string name("data/test/test.zip");
+    std::string prefix;
+    std::vector<ZipLocalHeader*> headers;
+    if (Files::existsLocal(name) == false)
+        prefix = "../";
+
+    SECTION("test 1")
+    {
+        name = prefix + "data/test/test.zip";
+
+        REQUIRE(Zip::readArchiveInfo(name, headers));
+        REQUIRE(headers.size() == 2);
+        REQUIRE(headers[0]->archiveName == name);
+        REQUIRE(headers[0]->fileName == "dir/hide.png");
+        REQUIRE(headers[0]->compressSize == 365);
+        REQUIRE(headers[0]->uncompressSize == 368);
+        REQUIRE(headers[1]->archiveName == name);
+        REQUIRE(headers[1]->fileName == "dir/brimmedhat.png");
+        REQUIRE(headers[1]->compressSize == 1959);
+        REQUIRE(headers[1]->uncompressSize == 1959);
+    }
+
+    SECTION("test 2")
+    {
+        name = prefix + "data/test/test2.zip";
+
+        REQUIRE(Zip::readArchiveInfo(name, headers));
+        REQUIRE(headers.size() == 11);
+        REQUIRE(headers[0]->archiveName == name);
+        REQUIRE(headers[0]->fileName == "test.txt");
+        REQUIRE(headers[0]->compressSize == 17);
+        REQUIRE(headers[0]->uncompressSize == 23);
+
+        REQUIRE(headers[1]->archiveName == name);
+        REQUIRE(headers[1]->fileName == "dir2/hide.png");
+        REQUIRE(headers[1]->compressSize == 365);
+        REQUIRE(headers[1]->uncompressSize == 368);
+
+        REQUIRE(headers[2]->archiveName == name);
+        REQUIRE(headers[2]->fileName == "dir2/test.txt");
+        REQUIRE(headers[2]->compressSize == 17);
+        REQUIRE(headers[2]->uncompressSize == 23);
+
+        REQUIRE(headers[3]->archiveName == name);
+        REQUIRE(headers[3]->fileName == "dir2/paths.xml");
+        REQUIRE(headers[3]->compressSize == 154);
+        REQUIRE(headers[3]->uncompressSize == 185);
+
+        REQUIRE(headers[4]->archiveName == name);
+        REQUIRE(headers[4]->fileName == "dir2/units.xml");
+        REQUIRE(headers[4]->compressSize == 202);
+        REQUIRE(headers[4]->uncompressSize == 306);
+
+        REQUIRE(headers[5]->archiveName == name);
+        REQUIRE(headers[5]->fileName == "dir/hide.png");
+        REQUIRE(headers[5]->compressSize == 365);
+        REQUIRE(headers[5]->uncompressSize == 368);
+
+        REQUIRE(headers[6]->archiveName == name);
+        REQUIRE(headers[6]->fileName == "dir/1/test.txt");
+        REQUIRE(headers[6]->compressSize == 17);
+        REQUIRE(headers[6]->uncompressSize == 23);
+
+        REQUIRE(headers[7]->archiveName == name);
+        REQUIRE(headers[7]->fileName == "dir/1/file1.txt");
+        REQUIRE(headers[7]->compressSize == 17);
+        REQUIRE(headers[7]->uncompressSize == 23);
+
+        REQUIRE(headers[8]->archiveName == name);
+        REQUIRE(headers[8]->fileName == "dir/gpl/palette.gpl");
+        REQUIRE(headers[8]->compressSize == 128);
+        REQUIRE(headers[8]->uncompressSize == 213);
+
+        REQUIRE(headers[9]->archiveName == name);
+        REQUIRE(headers[9]->fileName == "dir/dye.png");
+        REQUIRE(headers[9]->compressSize == 794);
+        REQUIRE(headers[9]->uncompressSize == 794);
+
+        REQUIRE(headers[10]->archiveName == name);
+        REQUIRE(headers[10]->fileName == "units.xml");
+        REQUIRE(headers[10]->compressSize == 202);
+        REQUIRE(headers[10]->uncompressSize == 306);
+    }
+
+    SECTION("test 3")
+    {
+        name = prefix + "data/test/test3.zip";
+
+        REQUIRE(Zip::readArchiveInfo(name, headers));
+        REQUIRE(headers.size() == 2);
+        REQUIRE(headers[0]->archiveName == name);
+        REQUIRE(headers[0]->fileName == "test.txt");
+        REQUIRE(headers[0]->compressSize == 17);
+        REQUIRE(headers[0]->uncompressSize == 23);
+        REQUIRE(headers[1]->archiveName == name);
+        REQUIRE(headers[1]->fileName == "units.xml");
+        REQUIRE(headers[1]->compressSize == 202);
+        REQUIRE(headers[1]->uncompressSize == 306);
+    }
+
+    SECTION("test 4")
+    {
+        name = prefix + "data/test/test4.zip";
+
+        REQUIRE(Zip::readArchiveInfo(name, headers));
+        REQUIRE(headers.size() == 0);
+    }
+
+    delete_all(headers);
+    delete2(logger);
+}
diff --git a/src/fs/ziplocalheader.h b/src/fs/ziplocalheader.h
new file mode 100644
index 000000000..1b00c3b54
--- /dev/null
+++ b/src/fs/ziplocalheader.h
@@ -0,0 +1,46 @@
+/*
+ *  The ManaPlus Client
+ *  Copyright (C) 2017  The ManaPlus Developers
+ *
+ *  This file is part of The ManaPlus Client.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  any later version.
+ *
+ *  This program is distributed in the hope that 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/>.
+ */
+
+#ifndef UTILS_ZIPLOCALHEADER_H
+#define UTILS_ZIPLOCALHEADER_H
+
+#include "localconsts.h"
+
+#include <string>
+
+struct ZipLocalHeader
+{
+    ZipLocalHeader() :
+        archiveName(),
+        fileName(),
+        dataOffset(0U),
+        compressSize(0U),
+        uncompressSize(0U)
+    {
+    }
+
+    std::string archiveName;
+    std::string fileName;
+    uint32_t dataOffset;
+    uint32_t compressSize;
+    uint32_t uncompressSize;
+};
+
+#endif  // UTILS_ZIPLOCALHEADER_H