Userland: Use LibPCIDB in lspci to print device names

Author: https://github.com/deoxxa
Commit: https://github.com/SerenityOS/serenity/commit/c7040cee62b
Pull-request: https://github.com/SerenityOS/serenity/pull/452
Reviewed-by: https://github.com/awesomekling

Userland/lspci.cpp

@@ -2,6 +2,7 @@
 #include <AK/JsonArray.h>
 #include <AK/JsonObject.h>
 #include <LibCore/CFile.h>
+#include <LibPCIDB/Database.h>
 #include <stdio.h>
 
 int main(int argc, char** argv)
@@ -9,15 +10,19 @@ int main(int argc, char** argv)
     UNUSED_PARAM(argc);
     UNUSED_PARAM(argv);
 
-    CFile file("/proc/pci");
-    if (!file.open(CIODevice::ReadOnly)) {
-        fprintf(stderr, "Error: %s\n", file.error_string());
+    auto db = PCIDB::Database::open();
+    if (!db)
+        fprintf(stderr, "Couldn't open PCI ID database\n");
+
+    CFile proc_pci("/proc/pci");
+    if (!proc_pci.open(CIODevice::ReadOnly)) {
+        fprintf(stderr, "Error: %s\n", proc_pci.error_string());
         return 1;
     }
 
-    auto file_contents = file.read_all();
+    auto file_contents = proc_pci.read_all();
     auto json = JsonValue::from_string(file_contents).as_array();
-    json.for_each([](auto& value) {
+    json.for_each([db](auto& value) {
         auto dev = value.as_object();
 
         auto bus = dev.get("bus").to_u32();
@@ -28,10 +33,25 @@ int main(int argc, char** argv)
         auto revision_id = dev.get("revision_id").to_u32();
         auto class_id = dev.get("class").to_u32();
 
-        printf("%02x:%02x.%d %04x: %04x:%04x (rev %02x)\n",
+        String vendor_name = String::format("%02x", vendor_id);
+        auto vendor = db->get_vendor(vendor_id);
+        if (vendor != "")
+            vendor_name = vendor;
+
+        String device_name = String::format("%02x", device_id);
+        auto device = db->get_device(vendor_id, device_id);
+        if (device != "")
+            device_name = device;
+
+        String class_name = String::format("%04x", class_id);
+        auto class_ptr = db->get_class(class_id);
+        if (class_ptr != "")
+            class_name = class_ptr;
+
+        printf("%02x:%02x.%d %s: %s %s (rev %02x)\n",
             bus, slot, function,
-            class_id, vendor_id, device_id, revision_id
-        );
+            class_name.characters(), vendor_name.characters(),
+            device_name.characters(), revision_id);
     });
 
     return 0;