rfc822: Move check_header into helper.c

The check_header() test function will be useful to more than one testcase
so this patch moves it into the common helper.c file.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

ccan/rfc822/test/helper.c

@@ -56,3 +56,43 @@ void failtest_setup(int argc, char *argv[])
 	rfc822_set_allocation_failure_handler(allocation_failure_continue);
 	talloc_set_allocator(malloc_wrapper, free_wrapper, realloc_wrapper);
 }
+
+void check_header(struct rfc822_msg *msg, struct rfc822_header *h,
+		  const char *name, const char *val,
+		  int crlf)
+{
+	struct bytestring hname, hvalue, hfull;
+	size_t namelen = strlen(name);
+	size_t valuelen = strlen(val);
+	size_t nln = crlf ? 2 : 1;
+	size_t fulllen = namelen + valuelen + 1 + nln;
+
+	ok(rfc822_header_errors(msg, h) == 0, "Header valid");
+	allocation_failure_check();
+
+	hname = rfc822_header_raw_name(msg, h);
+	allocation_failure_check();
+
+	ok(hname.ptr && bytestring_eq(hname, bytestring_from_string(name)),
+	   "Header name \"%.*s\"", (int)hname.len, hname.ptr);
+
+	hvalue = rfc822_header_raw_value(msg, h);
+	allocation_failure_check();
+
+	ok(hvalue.ptr && ((valuelen + nln) == hvalue.len)
+	   && (memcmp(val, hvalue.ptr, valuelen) == 0)
+	   && (!crlf || (hvalue.ptr[hvalue.len - 2] == '\r'))
+	   && (hvalue.ptr[hvalue.len - 1] == '\n'),
+	   "Header value");
+
+	hfull = rfc822_header_raw_content(msg, h);
+	allocation_failure_check();
+
+	ok(hfull.ptr && (fulllen == hfull.len)
+	   && (memcmp(name, hfull.ptr, namelen) == 0)
+	   && (hfull.ptr[namelen] == ':')
+	   && (memcmp(val, hfull.ptr + namelen + 1, valuelen) == 0)
+	   && (!crlf || (hfull.ptr[fulllen-2] == '\r'))
+	   && (hfull.ptr[fulllen-1] == '\n'),
+	   "Full header");
+}

ccan/rfc822/test/helper.h

+#include <ccan/tap/tap.h>
+
 void failtest_setup(int argc, char *argv[]);
 void allocation_failure_check(void);
+
+#define CHECK_HEADER_NUMTESTS	4
+void check_header(struct rfc822_msg *msg, struct rfc822_header *h,
+		  const char *name, const char *val,
+		  int crlf);

ccan/rfc822/test/run-hdr-and-body.c

@@ -27,47 +27,6 @@
 		} \
 	} while (0)
 
-static void check_header(struct rfc822_msg *msg,
-			 struct rfc822_header *h,
-			 const char *name, const char *val,
-			 int crlf)
-{
-	struct bytestring hname, hvalue, hfull;
-	size_t namelen = strlen(name);
-	size_t valuelen = strlen(val);
-	size_t nln = crlf ? 2 : 1;
-	size_t fulllen = namelen + valuelen + 1 + nln;
-
-	ok(rfc822_header_errors(msg, h) == 0, "Header valid");
-	allocation_failure_check();
-
-	hname = rfc822_header_raw_name(msg, h);
-	allocation_failure_check();
-
-	ok(hname.ptr && bytestring_eq(hname, bytestring_from_string(name)),
-	   "Header name \"%.*s\"", (int)hname.len, hname.ptr);
-
-	hvalue = rfc822_header_raw_value(msg, h);
-	allocation_failure_check();
-
-	ok(hvalue.ptr && ((valuelen + nln) == hvalue.len)
-	   && (memcmp(val, hvalue.ptr, valuelen) == 0)
-	   && (!crlf || (hvalue.ptr[hvalue.len - 2] == '\r'))
-	   && (hvalue.ptr[hvalue.len - 1] == '\n'),
-	   "Header value");
-
-	hfull = rfc822_header_raw_content(msg, h);
-	allocation_failure_check();
-
-	ok(hfull.ptr && (fulllen == hfull.len)
-	   && (memcmp(name, hfull.ptr, namelen) == 0)
-	   && (hfull.ptr[namelen] == ':')
-	   && (memcmp(val, hfull.ptr + namelen + 1, valuelen) == 0)
-	   && (!crlf || (hfull.ptr[fulllen-2] == '\r'))
-	   && (hfull.ptr[fulllen-1] == '\n'),
-	   "Full header");
-}
-
 static void test_bodyhdr(const struct aexample *e, const char *buf, size_t len,
 			 const char *exname, int crlf)
 {
@@ -153,7 +112,8 @@ int main(int argc, char *argv[])
 	struct aexample *e;
 
 	/* This is how many tests you plan to run */
-	plan_tests(20*num_aexamples() + 40*num_aexample_hdrs());
+	plan_tests(20*num_aexamples()
+		   + (36 + CHECK_HEADER_NUMTESTS)*num_aexample_hdrs());
 
 	failtest_setup(argc, argv);