Generate constants for HTTP status codes and reason phrases using macro.

net/http/http_status_code.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_HTTP_HTTP_STATUS_CODE_H_
 #define NET_HTTP_HTTP_STATUS_CODE_H_
 
 #include "net/base/net_export.h"
 
 namespace net {
 
 // HTTP status codes.
-// Taken from RFC 2616 Section 10.
 enum HttpStatusCode {
-  // Informational 1xx
-  HTTP_CONTINUE = 100,
-  HTTP_SWITCHING_PROTOCOLS = 101,
 
-  // Successful 2xx
-  HTTP_OK = 200,
-  HTTP_CREATED = 201,
-  HTTP_ACCEPTED = 202,
-  HTTP_NON_AUTHORITATIVE_INFORMATION = 203,
-  HTTP_NO_CONTENT = 204,
-  HTTP_RESET_CONTENT = 205,
-  HTTP_PARTIAL_CONTENT = 206,
+#define HTTP_STATUS(label, code, reason) HTTP_ ## label = code,
+#include "net/http/http_status_code_list.h"
+#undef HTTP_STATUS
 
-  // Redirection 3xx
-  HTTP_MULTIPLE_CHOICES = 300,
-  HTTP_MOVED_PERMANENTLY = 301,
-  HTTP_FOUND = 302,
-  HTTP_SEE_OTHER = 303,
-  HTTP_NOT_MODIFIED = 304,
-  HTTP_USE_PROXY = 305,
-  // 306 is no longer used.
-  HTTP_TEMPORARY_REDIRECT = 307,
-
-  // Client error 4xx
-  HTTP_BAD_REQUEST = 400,
-  HTTP_UNAUTHORIZED = 401,
-  HTTP_PAYMENT_REQUIRED = 402,
-  HTTP_FORBIDDEN = 403,
-  HTTP_NOT_FOUND = 404,
-  HTTP_METHOD_NOT_ALLOWED = 405,
-  HTTP_NOT_ACCEPTABLE = 406,
-  HTTP_PROXY_AUTHENTICATION_REQUIRED = 407,
-  HTTP_REQUEST_TIMEOUT = 408,
-  HTTP_CONFLICT = 409,
-  HTTP_GONE = 410,
-  HTTP_LENGTH_REQUIRED = 411,
-  HTTP_PRECONDITION_FAILED = 412,
-  HTTP_REQUEST_ENTITY_TOO_LARGE = 413,
-  HTTP_REQUEST_URI_TOO_LONG = 414,
-  HTTP_UNSUPPORTED_MEDIA_TYPE = 415,
-  HTTP_REQUESTED_RANGE_NOT_SATISFIABLE = 416,
-  HTTP_EXPECTATION_FAILED = 417,
-
-  // Server error 5xx
-  HTTP_INTERNAL_SERVER_ERROR = 500,
-  HTTP_NOT_IMPLEMENTED = 501,
-  HTTP_BAD_GATEWAY = 502,
-  HTTP_SERVICE_UNAVAILABLE = 503,
-  HTTP_GATEWAY_TIMEOUT = 504,
-  HTTP_VERSION_NOT_SUPPORTED = 505,
 };
 
 // Returns the corresponding HTTP status description to use in the Reason-Phrase
 // field in an HTTP response for given |code|. It's based on the IANA HTTP
 // Status Code Registry.
 // http://www.iana.org/assignments/http-status-codes/http-status-codes.xml
 //
-// This function doesn't cover all codes defined above. It returns an empty
-// string (or crash in debug build) for status codes which are not yet covered
-// or just invalid. Please extend it when needed.
+// This function doesn't cover all codes defined in the registry. It returns an

[wtc, 2013/06/07 21:24:18]

doesn't cover => may not cover

registry => IANA registry

You covered all the codes defined in the registry, right? So this problem
will only occur when new status codes are added.
 

[tyoshino (SeeGerritForStatus), 2013/06/10 06:14:00]

Done
Done
I added reason phrases for all codes which were already defined in this file,
but it still doesn't cover all the codes defined in the IANA registry. So, I
kept this comment but just replaced "above" with "in the registry".

+// empty string (or crash in debug build) for status codes which are not yet
+// covered or just invalid. Please extend it when needed.
 NET_EXPORT const char* GetHttpReasonPhrase(HttpStatusCode code);
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_STATUS_CODE_H_