add KCHR decoder

fuzziqersoftware · Oct 20, 2024 · c5a0d63 · c5a0d63
1 parent f370694
commit c5a0d63
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Showing 4 changed files with 164 additions and 190 deletions.
diff --git a/src/ResourceFile.cc b/src/ResourceFile.cc
@@ -4460,6 +4460,59 @@ string ResourceFile::decode_styl(shared_ptr<const Resource> res) const {
   return ret;
 }
 
+ResourceFile::DecodedKeyCharMap ResourceFile::decode_KCHR(int16_t id, uint32_t type) const {
+  return this->decode_KCHR(this->get_resource(type, id));
+}
+
+ResourceFile::DecodedKeyCharMap ResourceFile::decode_KCHR(std::shared_ptr<const Resource> res) {
+  return ResourceFile::decode_KCHR(res->data.data(), res->data.size());
+}
+
+ResourceFile::DecodedKeyCharMap ResourceFile::decode_KCHR(const void* data, size_t size) {
+  StringReader r(data, size);
+  uint16_t version = r.get_u16b();
+  if (version != 0) {
+    throw runtime_error(string_printf("unknown KCHR version: %hu", version));
+  }
+
+  DecodedKeyCharMap ret;
+  for (size_t z = 0; z < ret.table_index_for_modifiers.size(); z++) {
+    ret.table_index_for_modifiers[z] = r.get_u8();
+  }
+
+  size_t num_tables = r.get_u16b();
+  for (size_t z = 0; z < ret.table_index_for_modifiers.size(); z++) {
+    if (ret.table_index_for_modifiers[z] >= num_tables) {
+      throw runtime_error(string_printf(
+          "table index %zX refers to out-of-bounds table %02hhX (there are only %zX tables)",
+          z, ret.table_index_for_modifiers[z], num_tables));
+    }
+  }
+  while (ret.tables.size() < num_tables) {
+    auto& table = ret.tables.emplace_back();
+    for (size_t z = 0; z < table.size(); z++) {
+      table[z] = r.get_u8();
+    }
+  }
+
+  size_t num_dead_keys = r.get_u16b();
+  while (ret.dead_keys.size() < num_dead_keys) {
+    auto& dead_key = ret.dead_keys.emplace_back();
+    dead_key.table_index = r.get_u8();
+    dead_key.virtual_key_code = r.get_u8();
+    size_t num_completions = r.get_u16b();
+    while (dead_key.completions.size() < num_completions) {
+      auto& completion = dead_key.completions.emplace_back();
+      completion.completion_char = r.get_u8();
+      completion.substitute_char = r.get_u8();
+    }
+    dead_key.no_match_completion.completion_char = r.get_u8();
+    dead_key.no_match_completion.substitute_char = r.get_u8();
+  }
+
+  return ret;
+}
+
 ////////////////////////////////////////////////////////////////////////////////
 // Font decoding
 

diff --git a/src/ResourceFile.hh b/src/ResourceFile.hh
@@ -517,6 +517,22 @@ public:
     std::vector<Item> items;
   };
 
+  struct DecodedKeyCharMap {
+    struct DeadKey {
+      struct Completion {
+        uint8_t completion_char;
+        uint8_t substitute_char;
+      };
+      uint8_t table_index;
+      uint8_t virtual_key_code;
+      std::vector<Completion> completions;
+      Completion no_match_completion;
+    };
+    std::array<uint8_t, 0x100> table_index_for_modifiers;
+    std::vector<std::array<uint8_t, 0x80>> tables;
+    std::vector<DeadKey> dead_keys;
+  };
+
   struct TemplateEntry {
     enum class Type {
       VOID, // DVDR
@@ -790,6 +806,9 @@ public:
   static std::string decode_TEXT(const void* data, size_t size);
   std::string decode_styl(int16_t id, uint32_t type = RESOURCE_TYPE_styl) const;
   std::string decode_styl(std::shared_ptr<const Resource> res) const;
+  DecodedKeyCharMap decode_KCHR(int16_t id, uint32_t type = RESOURCE_TYPE_KCHR) const;
+  static DecodedKeyCharMap decode_KCHR(std::shared_ptr<const Resource> res);
+  static DecodedKeyCharMap decode_KCHR(const void* data, size_t size);
 
   // Font resources
   DecodedFontResource decode_FONT(int16_t id, uint32_t type = RESOURCE_TYPE_FONT) const;

diff --git a/src/ResourceTypes.hh b/src/ResourceTypes.hh
@@ -155,6 +155,7 @@ constexpr uint32_t RESOURCE_TYPE_itlb = resource_type("itlb");
 constexpr uint32_t RESOURCE_TYPE_itlc = resource_type("itlc");
 constexpr uint32_t RESOURCE_TYPE_itlk = resource_type("itlk");
 constexpr uint32_t RESOURCE_TYPE_KBDN = resource_type("KBDN");
+constexpr uint32_t RESOURCE_TYPE_KCHR = resource_type("KCHR");
 constexpr uint32_t RESOURCE_TYPE_kcs4 = resource_type("kcs4");
 constexpr uint32_t RESOURCE_TYPE_kcs8 = resource_type("kcs8");
 constexpr uint32_t RESOURCE_TYPE_kcsN = resource_type("kcs#");