temporary

elf.cc

@@ -35,3 +35,46 @@ std::string_view ElfFile::get_string(u32 idx) const {
     error(mb.name + ": invalid section index");
   return get_string(sections[idx]);
 }
+
+struct ArHdr {
+  std::string get_name() const {
+    std::string_view view(ar_name);
+    return std::string(view.substr(0, view.find(' ')));
+  }
+
+  u32 get_size() const {
+    u32 sz = 0;
+    for (char c : ar_size)
+      if (isdigit(c))
+        sz = sz * 10 + c - '0';
+    return sz;
+  }
+
+  char ar_name[16];
+  char ar_date[12];
+  char ar_uid[6];
+  char ar_gid[6];
+  char ar_mode[8];
+  char ar_size[10];
+  char ar_fmag[2];
+};
+
+std::vector<MemoryMappedFile> read_archive_members(MemoryMappedFile mb) {
+  if (mb.size < 8 || memcmp(mb.data, "!<arch>\n", 8))
+    error(mb.name + ": not an archive file");
+  u8 *data = mb.data + 8;
+
+  std::vector<MemoryMappedFile> vec;
+
+  while (data < mb.data + mb.size) {
+    ArHdr &hdr = *(ArHdr *)data;
+    data += sizeof(ArHdr);
+    
+    std::string name = hdr.get_name();
+    u32 size = hdr.get_size();
+    if (name != "/" && name != "//" && name != "__.SYMDEF")
+      vec.push_back({name, data, size});
+    data += size;
+  }
+  return vec;
+}

main.cc

@@ -146,8 +146,8 @@ MemoryMappedFile must_open_input_file(std::string path) {
 void read_file(MemoryMappedFile mb) {
   switch (identify_magic({(char *)mb.data, mb.size})) {
   case file_magic::archive:
-    for (MemoryMappedFile member : get_archive_members(mb))
-      out::objs.push_back(new ObjectFile(member, mb.name));
+    for (MemoryMappedFile &child : read_archive_members(mb))
+      out::objs.push_back(new ObjectFile(child, mb.name));
     break;
   case file_magic::elf_relocatable:
     out::objs.push_back(new ObjectFile(mb, ""));

mold.h

@@ -274,6 +274,8 @@ private:
   std::span<ElfShdr> sections;
 };
 
+std::vector<MemoryMappedFile> read_archive_members(MemoryMappedFile mb);
+
 //
 // Symbol
 //