1 files changed, 116 insertions, 0 deletions
diff --git a/lib/names-hwdb.c b/lib/names-hwdb.c
new file mode 100644
index 0000000..171723b
--- /dev/null
+++ b/lib/names-hwdb.c
@@ -0,0 +1,116 @@
+/*
+ *	The PCI Library -- Looking up Names via UDEV and HWDB
+ *
+ *	Copyright (c) 2013--2014 Tom Gundersen <teg@jklm.no>
+ *	Copyright (c) 2014 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#include <string.h>
+
+#include "internal.h"
+#include "names.h"
+
+#ifdef PCI_HAVE_HWDB
+
+#include <libudev.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+char *
+pci_id_hwdb_lookup(struct pci_access *a, int cat, int id1, int id2, int id3, int id4)
+{
+  char modalias[64];
+  const char *key = NULL;
+
+  const char *disabled = pci_get_param(a, "hwdb.disable");
+  if (disabled && atoi(disabled))
+    return NULL;
+
+  switch (cat)
+    {
+    case ID_VENDOR:
+      sprintf(modalias, "pci:v%08X*", id1);
+      key = "ID_VENDOR_FROM_DATABASE";
+      break;
+    case ID_DEVICE:
+      sprintf(modalias, "pci:v%08Xd%08X*", id1, id2);
+      key = "ID_MODEL_FROM_DATABASE";
+      break;
+    case ID_SUBSYSTEM:
+      sprintf(modalias, "pci:v%08Xd%08Xsv%08Xsd%08X*", id1, id2, id3, id4);
+      key = "ID_MODEL_FROM_DATABASE";
+      break;
+    case ID_GEN_SUBSYSTEM:
+      sprintf(modalias, "pci:v*d*sv%08Xsd%08X*", id1, id2);
+      key = "ID_MODEL_FROM_DATABASE";
+      break;
+    case ID_CLASS:
+      sprintf(modalias, "pci:v*d*sv*sd*bc%02X*", id1);
+      key = "ID_PCI_CLASS_FROM_DATABASE";
+      break;
+    case ID_SUBCLASS:
+      sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02X*", id1, id2);
+      key = "ID_PCI_SUBCLASS_FROM_DATABASE";
+      break;
+    case ID_PROGIF:
+      sprintf(modalias, "pci:v*d*sv*sd*bc%02Xsc%02Xi%02X*", id1, id2, id3);
+      key = "ID_PCI_INTERFACE_FROM_DATABASE";
+      break;
+    }
+
+  if (key)
+    {
+      if (!a->id_udev_hwdb)
+	{
+	  a->debug("Initializing UDEV HWDB\n");
+	  a->id_udev = udev_new();
+	  a->id_udev_hwdb = udev_hwdb_new(a->id_udev);
+	}
+
+      struct udev_list_entry *entry;
+      udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(a->id_udev_hwdb, modalias, 0))
+	{
+	  const char *entry_name = udev_list_entry_get_name(entry);
+	  if (entry_name && !strcmp(entry_name, key))
+	    {
+	      const char *entry_value = udev_list_entry_get_value(entry);
+	      if (entry_value)
+		return pci_strdup(a, entry_value);
+	    }
+	}
+    }
+
+  return NULL;
+}
+
+void
+pci_id_hwdb_free(struct pci_access *a)
+{
+  if (a->id_udev_hwdb)
+    {
+      udev_hwdb_unref(a->id_udev_hwdb);
+      a->id_udev_hwdb = NULL;
+    }
+  if (a->id_udev)
+    {
+      udev_unref(a->id_udev);
+      a->id_udev = NULL;
+    }
+}
+
+#else
+
+char *
+pci_id_hwdb_lookup(struct pci_access *a UNUSED, int cat UNUSED, int id1 UNUSED, int id2 UNUSED, int id3 UNUSED, int id4 UNUSED)
+{
+  return NULL;
+}
+
+void
+pci_id_hwdb_free(struct pci_access *a UNUSED)
+{
+}
+
+#endif