King_DuckZ
fd8a1cbabc
This is needed to recognize what type of tiles a layer contains. Client code has to fill in a map of hash => add_layer<T>() pointers. As a layer is loaded, the correct add_layer<T>() is called based on the hash saved with the layer itself.
239 lines
9.8 KiB
C++
239 lines
9.8 KiB
C++
#include "doorkeeper/helpers/tylermapsource.hpp"
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#include <limits>
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#include <algorithm>
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#include <ciso646>
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#include <boost/lexical_cast.hpp>
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#include <boost/utility/string_ref.hpp>
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#include <iterator>
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#if defined(__GNUC__)
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# include <endian.h>
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#else
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# error "Unsupported compiler"
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#endif
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#include <algorithm>
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#include <iterator>
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//Vorbis comment specification: https://www.xiph.org/vorbis/doc/v-comment.html
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//The comment header logically is a list of eight-bit-clean vectors; the number
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//of vectors is bounded to 2^32-1 and the length of each vector is limited to
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//2^32-1 bytes. The vector length is encoded; the vector contents themselves
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//are not null terminated. In addition to the vector list, there is a single
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//vector for vendor name (also 8 bit clean, length encoded in 32 bits). For
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//example, the 1.0 release of libvorbis set the vendor string to "Xiph.Org
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//libVorbis I 20020717".
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//
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//The comment header is decoded as follows:
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//
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// 1) [vendor_length] = read an unsigned integer of 32 bits
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// 2) [vendor_string] = read a UTF-8 vector as [vendor_length] octets
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// 3) [user_comment_list_length] = read an unsigned integer of 32 bits
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// 4) iterate [user_comment_list_length] times {
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// 5) [length] = read an unsigned integer of 32 bits
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// 6) this iteration's user comment = read a UTF-8 vector as [length] octets
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// }
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namespace dkh {
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namespace {
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const uint32_t g_signature = 0x52504B44; //DKPR
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template <typename T> T lil_endian_to_machine ( T parIn ) a_pure;
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template<> uint64_t lil_endian_to_machine ( uint64_t parIn ) a_pure;
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template<> uint32_t lil_endian_to_machine ( uint32_t parIn ) a_pure;
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template<> uint16_t lil_endian_to_machine ( uint16_t parIn ) a_pure;
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template<> uint8_t lil_endian_to_machine ( uint8_t parIn ) a_pure;
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template<> implem::TylerMapHeader lil_endian_to_machine ( implem::TylerMapHeader parIn ) a_pure;
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template<> implem::TylerMapLayerHeader lil_endian_to_machine ( implem::TylerMapLayerHeader parIn ) a_pure;
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#if defined(WITH_TYLERMAP_WRITER)
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template <typename T> T machine_to_lil_endian ( T parIn ) a_pure;
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template<> uint64_t machine_to_lil_endian ( uint64_t parIn ) a_pure;
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template<> uint32_t machine_to_lil_endian ( uint32_t parIn ) a_pure;
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template<> uint16_t machine_to_lil_endian ( uint16_t parIn ) a_pure;
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template<> uint8_t machine_to_lil_endian ( uint8_t parIn ) a_pure;
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template<> implem::TylerMapHeader machine_to_lil_endian ( implem::TylerMapHeader parIn ) a_pure;
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template<> implem::TylerMapLayerHeader machine_to_lil_endian ( implem::TylerMapLayerHeader parIn ) a_pure;
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#endif
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template<> uint64_t lil_endian_to_machine (uint64_t parIn) { return le64toh(parIn); }
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template<> uint32_t lil_endian_to_machine (uint32_t parIn) { return le32toh(parIn); }
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template<> uint16_t lil_endian_to_machine (uint16_t parIn) { return le16toh(parIn); }
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template<> uint8_t lil_endian_to_machine (uint8_t parIn) { return parIn; }
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bool isdigit (char parChar) a_pure a_flatten;
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template<> implem::TylerMapHeader lil_endian_to_machine (implem::TylerMapHeader parIn) {
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parIn.signature = lil_endian_to_machine(parIn.signature);
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parIn.file_size = lil_endian_to_machine(parIn.file_size);
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parIn.version_major = lil_endian_to_machine(parIn.version_major);
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parIn.version_minor = lil_endian_to_machine(parIn.version_minor);
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parIn.layer_count = lil_endian_to_machine(parIn.layer_count);
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parIn.map_type = lil_endian_to_machine(parIn.map_type);
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parIn.hashing_algorithm = lil_endian_to_machine(parIn.hashing_algorithm);
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parIn.dimensions = lil_endian_to_machine(parIn.dimensions);
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parIn.dimensions_start = lil_endian_to_machine(parIn.dimensions_start);
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parIn.comment_start = lil_endian_to_machine(parIn.comment_start);
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parIn.layer_start = lil_endian_to_machine(parIn.layer_start);
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return parIn;
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}
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template<> implem::TylerMapLayerHeader lil_endian_to_machine (implem::TylerMapLayerHeader parIn) {
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parIn.layer_length = lil_endian_to_machine(parIn.layer_length);
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parIn.layer_format = lil_endian_to_machine(parIn.layer_format);
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return parIn;
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}
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#if defined(WITH_TYLERMAP_WRITER)
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template<> uint64_t machine_to_lil_endian (uint64_t parIn) { return htole64(parIn); }
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template<> uint32_t machine_to_lil_endian (uint32_t parIn) { return htole32(parIn); }
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template<> uint16_t machine_to_lil_endian (uint16_t parIn) { return htole16(parIn); }
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template<> uint8_t machine_to_lil_endian (uint8_t parIn) { return parIn; }
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template<> implem::TylerMapHeader machine_to_lil_endian (implem::TylerMapHeader parIn) {
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parIn.signature = machine_to_lil_endian(parIn.signature);
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parIn.file_size = machine_to_lil_endian(parIn.file_size);
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parIn.version_major = machine_to_lil_endian(parIn.version_major);
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parIn.version_minor = machine_to_lil_endian(parIn.version_minor);
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parIn.layer_count = machine_to_lil_endian(parIn.layer_count);
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parIn.map_type = machine_to_lil_endian(parIn.map_type);
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parIn.hashing_algorithm = machine_to_lil_endian(parIn.hashing_algorithm);
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parIn.dimensions = machine_to_lil_endian(parIn.dimensions);
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parIn.dimensions_start = machine_to_lil_endian(parIn.dimensions_start);
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parIn.comment_start = machine_to_lil_endian(parIn.comment_start);
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parIn.layer_start = machine_to_lil_endian(parIn.layer_start);
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return parIn;
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}
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template<> implem::TylerMapLayerHeader machine_to_lil_endian (implem::TylerMapLayerHeader parIn) {
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parIn.layer_length = machine_to_lil_endian(parIn.layer_length);
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parIn.layer_format = machine_to_lil_endian(parIn.layer_format);
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return parIn;
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}
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#endif
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template <typename T>
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T read_int (std::istream& parStream, T parMax=std::numeric_limits<T>::max()) {
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T retval;
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parStream.read(reinterpret_cast<char*>(&retval), sizeof(T));
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retval = lil_endian_to_machine(retval);
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if (retval > parMax)
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throw InvalidMapFileException();
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return retval;
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}
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std::string& read_string (std::istream& parStream, std::string& parString) {
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const uint32_t max_string_length = 1024 * 2;
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const uint32_t len = std::min(read_int<uint32_t>(parStream), max_string_length);
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std::istream_iterator<char> itstream(parStream);
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parString.resize(len);
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std::copy_n(itstream, len, std::insert_iterator<std::string>(parString, parString.begin()));
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return parString;
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}
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#if defined(WITH_TYLERMAP_WRITER)
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template <typename T>
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void write_int (std::ostream& parStream, T parValue) {
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parValue = machine_to_lil_endian(parValue);
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parStream.write(reinterpret_cast<const char*>(&parValue), sizeof(T));
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}
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void write_string (std::ostream& parStream, const std::string& parString) {
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const uint32_t len = static_cast<uint32_t>(parString.size());
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write_int<uint32_t>(parStream, len);
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parStream.write(parString.c_str(), parString.size());
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}
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#endif
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bool isdigit (char parChar) {
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return std::isdigit(parChar);
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}
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} //unnamed namespace
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namespace implem {
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void read_header (std::istream& parStream, TylerMapHeader& parHeader) {
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parStream.read(reinterpret_cast<char*>(&parHeader), sizeof(TylerMapHeader));
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parHeader = lil_endian_to_machine(parHeader);
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if (g_signature != parHeader.signature)
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throw InvalidMapFileException();
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}
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void read_comments (std::istream& parStream, std::string& parVendor, CommentMap& parComments) {
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//Technically there is no limit on strings other than the uint32
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//max value, but wth
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const uint32_t max_entries = 200;
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read_string(parStream, parVendor);
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const uint32_t list_length = read_int<uint32_t>(parStream, max_entries);
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std::string full_string;
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for (uint32_t z = 0; z < list_length; ++z) {
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read_string(parStream, full_string);
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auto equal_pos = full_string.find('=');
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if (std::string::npos == equal_pos)
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throw InvalidMapFileException();
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parComments[full_string.substr(0, equal_pos)] = full_string.substr(equal_pos + 1);
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}
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}
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void read_layer_header (std::istream& parStream, TylerMapLayerHeader& parHeader) {
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parStream.read(reinterpret_cast<char*>(&parHeader), sizeof(TylerMapLayerHeader));
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parHeader = lil_endian_to_machine(parHeader);
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}
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void read_dimensions (std::istream& parStream, uint32_t parDimensions, std::vector<uint32_t>& parMap, std::vector<uint16_t>& parTile) {
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parMap.reserve(parMap.size() + parDimensions);
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for (uint32_t z = 0; z < parDimensions; ++z) {
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const auto dim = read_int<uint32_t>(parStream);
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parMap.push_back(dim);
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}
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parTile.reserve(parTile.size() + parDimensions);
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for (uint32_t z = 0; z < parDimensions; ++z) {
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const auto dim = read_int<uint16_t>(parStream);
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parTile.push_back(dim);
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}
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}
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void extract_array_from_comments (std::vector<std::string>& parOut, const std::string& parPrefix, const std::map<std::string, std::string>& parMap) {
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typedef decltype(std::distance(parPrefix.begin(), parPrefix.end())) diff_type;
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using std::size_t;
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using boost::lexical_cast;
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parOut.clear();
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for (const auto& itcurr : parMap) {
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const std::string& key = itcurr.first;
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if (parPrefix.size() + 3 > key.size())
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continue;
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if (not std::equal(parPrefix.begin(), parPrefix.end(), key.begin()))
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continue;
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if (key[parPrefix.size()] != '[')
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continue;
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auto it_past_index = std::find_if_not(key.begin() + parPrefix.size() + 1, key.end(), &isdigit);
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if (it_past_index == key.end())
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continue;
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if (*it_past_index != ']')
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continue;
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if (std::distance(key.begin(), it_past_index) + 1 != static_cast<diff_type>(key.size()))
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continue;
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boost::string_ref index_part(key);
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const auto dist = std::distance(key.begin(), it_past_index);
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DK_ASSERT(dist > static_cast<diff_type>(parPrefix.size() + 1));
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index_part = index_part.substr(parPrefix.size() + 1, dist - parPrefix.size() - 1);
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const size_t index = lexical_cast<size_t>(index_part);
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if (index >= parMap.size())
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continue;
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if (parOut.size() <= index)
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parOut.resize(index + 1);
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parOut[index] = itcurr.second;
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}
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}
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} //namespace implem
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} //namespace dkh
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