wire: add bool routines.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

tools/generate-wire.py

@@ -14,7 +14,7 @@ class FieldType(object):
         self.tsize = FieldType._typesize(name)
 
     def is_assignable(self):
-        return self.name == 'u8' or self.name == 'u16' or self.name == 'u32' or self.name == 'u64'
+        return self.name == 'u8' or self.name == 'u16' or self.name == 'u32' or self.name == 'u64' or self.name == 'bool'
 
     # Returns typename and base size
     @staticmethod
@@ -39,6 +39,8 @@ class FieldType(object):
             return 2
         elif typename == 'u8':
             return 1
+        elif typename == 'bool':
+            return 1
         else:
             raise ValueError('Unknown typename {}'.format(typename))
 

wire/fromwire.c

@@ -76,6 +76,17 @@ u64 fromwire_u64(const u8 **cursor, size_t *max)
 	return be64_to_cpu(ret);
 }
 
+bool fromwire_bool(const u8 **cursor, size_t *max)
+{
+	u8 ret;
+
+	if (!fromwire(cursor, max, &ret, sizeof(ret)))
+		return false;
+	if (ret != 0 && ret != 1)
+		fail_pull(cursor, max);
+	return ret;
+}
+
 void fromwire_pubkey(const u8 **cursor, size_t *max, struct pubkey *pubkey)
 {
 	u8 der[PUBKEY_DER_LEN];

wire/towire.c

@@ -35,6 +35,12 @@ void towire_u64(u8 **pptr, u64 v)
 	towire(pptr, &l, sizeof(l));
 }
 
+void towire_bool(u8 **pptr, bool v)
+{
+	u8 val = !!v;
+	towire(pptr, &val, sizeof(val));
+}
+
 void towire_pubkey(u8 **pptr, const struct pubkey *pubkey)
 {
 	u8 output[PUBKEY_DER_LEN];

wire/wire.h

@@ -32,6 +32,7 @@ void towire_u16(u8 **pptr, u16 v);
 void towire_u32(u8 **pptr, u32 v);
 void towire_u64(u8 **pptr, u64 v);
 void towire_pad(u8 **pptr, size_t num);
+void towire_bool(u8 **pptr, bool v);
 
 void towire_u8_array(u8 **pptr, const u8 *arr, size_t num);
 void towire_signature_array(u8 **pptr, const struct signature *arr, size_t num);
@@ -42,6 +43,7 @@ u8 fromwire_u8(const u8 **cursor, size_t *max);
 u16 fromwire_u16(const u8 **cursor, size_t *max);
 u32 fromwire_u32(const u8 **cursor, size_t *max);
 u64 fromwire_u64(const u8 **cursor, size_t *max);
+bool fromwire_bool(const u8 **cursor, size_t *max);
 void fromwire_pubkey(const u8 **cursor, size_t *max, struct pubkey *pubkey);
 void fromwire_signature(const u8 **cursor, size_t *max,
 			struct signature *signature);