Switch kernel header parsing to python libclang

Replace the tokenizer in cpp.py with libclang.

Bug: 18937958
Change-Id: I27630904c6d2849418cd5ca3d3c612ec3078686d
diff --git a/libc/kernel/uapi/linux/if_tunnel.h b/libc/kernel/uapi/linux/if_tunnel.h
index 3b86ff0..fea3428 100644
--- a/libc/kernel/uapi/linux/if_tunnel.h
+++ b/libc/kernel/uapi/linux/if_tunnel.h
@@ -47,111 +47,111 @@
 #define GRE_VERSION __cpu_to_be16(0x0007)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ip_tunnel_parm {
- char name[IFNAMSIZ];
- int link;
- __be16 i_flags;
+  char name[IFNAMSIZ];
+  int link;
+  __be16 i_flags;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __be16 o_flags;
- __be32 i_key;
- __be32 o_key;
- struct iphdr iph;
+  __be16 o_flags;
+  __be32 i_key;
+  __be32 o_key;
+  struct iphdr iph;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
 enum {
- IFLA_IPTUN_UNSPEC,
- IFLA_IPTUN_LINK,
+  IFLA_IPTUN_UNSPEC,
+  IFLA_IPTUN_LINK,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_IPTUN_LOCAL,
- IFLA_IPTUN_REMOTE,
- IFLA_IPTUN_TTL,
- IFLA_IPTUN_TOS,
+  IFLA_IPTUN_LOCAL,
+  IFLA_IPTUN_REMOTE,
+  IFLA_IPTUN_TTL,
+  IFLA_IPTUN_TOS,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_IPTUN_ENCAP_LIMIT,
- IFLA_IPTUN_FLOWINFO,
- IFLA_IPTUN_FLAGS,
- IFLA_IPTUN_PROTO,
+  IFLA_IPTUN_ENCAP_LIMIT,
+  IFLA_IPTUN_FLOWINFO,
+  IFLA_IPTUN_FLAGS,
+  IFLA_IPTUN_PROTO,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_IPTUN_PMTUDISC,
- IFLA_IPTUN_6RD_PREFIX,
- IFLA_IPTUN_6RD_RELAY_PREFIX,
- IFLA_IPTUN_6RD_PREFIXLEN,
+  IFLA_IPTUN_PMTUDISC,
+  IFLA_IPTUN_6RD_PREFIX,
+  IFLA_IPTUN_6RD_RELAY_PREFIX,
+  IFLA_IPTUN_6RD_PREFIXLEN,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
- IFLA_IPTUN_ENCAP_TYPE,
- IFLA_IPTUN_ENCAP_FLAGS,
- IFLA_IPTUN_ENCAP_SPORT,
+  IFLA_IPTUN_6RD_RELAY_PREFIXLEN,
+  IFLA_IPTUN_ENCAP_TYPE,
+  IFLA_IPTUN_ENCAP_FLAGS,
+  IFLA_IPTUN_ENCAP_SPORT,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_IPTUN_ENCAP_DPORT,
- __IFLA_IPTUN_MAX,
+  IFLA_IPTUN_ENCAP_DPORT,
+  __IFLA_IPTUN_MAX,
 };
 #define IFLA_IPTUN_MAX (__IFLA_IPTUN_MAX - 1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 enum tunnel_encap_types {
- TUNNEL_ENCAP_NONE,
- TUNNEL_ENCAP_FOU,
- TUNNEL_ENCAP_GUE,
+  TUNNEL_ENCAP_NONE,
+  TUNNEL_ENCAP_FOU,
+  TUNNEL_ENCAP_GUE,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 };
-#define TUNNEL_ENCAP_FLAG_CSUM (1<<0)
-#define TUNNEL_ENCAP_FLAG_CSUM6 (1<<1)
+#define TUNNEL_ENCAP_FLAG_CSUM (1 << 0)
+#define TUNNEL_ENCAP_FLAG_CSUM6 (1 << 1)
 #define SIT_ISATAP 0x0001
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ip_tunnel_prl {
- __be32 addr;
- __u16 flags;
- __u16 __reserved;
+  __be32 addr;
+  __u16 flags;
+  __u16 __reserved;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u32 datalen;
- __u32 __reserved2;
+  __u32 datalen;
+  __u32 __reserved2;
 };
 #define PRL_DEFAULT 0x0001
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
 struct ip_tunnel_6rd {
- struct in6_addr prefix;
- __be32 relay_prefix;
- __u16 prefixlen;
+  struct in6_addr prefix;
+  __be32 relay_prefix;
+  __u16 prefixlen;
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __u16 relay_prefixlen;
+  __u16 relay_prefixlen;
 };
 enum {
- IFLA_GRE_UNSPEC,
+  IFLA_GRE_UNSPEC,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_GRE_LINK,
- IFLA_GRE_IFLAGS,
- IFLA_GRE_OFLAGS,
- IFLA_GRE_IKEY,
+  IFLA_GRE_LINK,
+  IFLA_GRE_IFLAGS,
+  IFLA_GRE_OFLAGS,
+  IFLA_GRE_IKEY,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_GRE_OKEY,
- IFLA_GRE_LOCAL,
- IFLA_GRE_REMOTE,
- IFLA_GRE_TTL,
+  IFLA_GRE_OKEY,
+  IFLA_GRE_LOCAL,
+  IFLA_GRE_REMOTE,
+  IFLA_GRE_TTL,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_GRE_TOS,
- IFLA_GRE_PMTUDISC,
- IFLA_GRE_ENCAP_LIMIT,
- IFLA_GRE_FLOWINFO,
+  IFLA_GRE_TOS,
+  IFLA_GRE_PMTUDISC,
+  IFLA_GRE_ENCAP_LIMIT,
+  IFLA_GRE_FLOWINFO,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_GRE_FLAGS,
- IFLA_GRE_ENCAP_TYPE,
- IFLA_GRE_ENCAP_FLAGS,
- IFLA_GRE_ENCAP_SPORT,
+  IFLA_GRE_FLAGS,
+  IFLA_GRE_ENCAP_TYPE,
+  IFLA_GRE_ENCAP_FLAGS,
+  IFLA_GRE_ENCAP_SPORT,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_GRE_ENCAP_DPORT,
- __IFLA_GRE_MAX,
+  IFLA_GRE_ENCAP_DPORT,
+  __IFLA_GRE_MAX,
 };
 #define IFLA_GRE_MAX (__IFLA_GRE_MAX - 1)
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
-#define VTI_ISVTI ((__force __be16)0x0001)
+#define VTI_ISVTI ((__force __be16) 0x0001)
 enum {
- IFLA_VTI_UNSPEC,
- IFLA_VTI_LINK,
+  IFLA_VTI_UNSPEC,
+  IFLA_VTI_LINK,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- IFLA_VTI_IKEY,
- IFLA_VTI_OKEY,
- IFLA_VTI_LOCAL,
- IFLA_VTI_REMOTE,
+  IFLA_VTI_IKEY,
+  IFLA_VTI_OKEY,
+  IFLA_VTI_LOCAL,
+  IFLA_VTI_REMOTE,
 /* WARNING: DO NOT EDIT, AUTO-GENERATED CODE - SEE TOP FOR INSTRUCTIONS */
- __IFLA_VTI_MAX,
+  __IFLA_VTI_MAX,
 };
 #define IFLA_VTI_MAX (__IFLA_VTI_MAX - 1)
 #endif