src: alias BINARY to LATIN1

Make BINARY an alias for LATIN1 rather than a distinct enum value.

PR-URL: https://github.com/nodejs/node/pull/7284
Refs: https://github.com/nodejs/node/pull/7262
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>

src/node.cc

@@ -1358,7 +1358,7 @@ enum encoding ParseEncoding(const char* encoding,
   } else if (StringEqualNoCase(encoding, "latin1")) {
     return LATIN1;
   } else if (StringEqualNoCase(encoding, "binary")) {
-    return BINARY;
+    return LATIN1;  // BINARY is a deprecated alias of LATIN1.
   } else if (StringEqualNoCase(encoding, "buffer")) {
     return BUFFER;
   } else if (StringEqualNoCase(encoding, "hex")) {

src/node.h

@@ -278,7 +278,9 @@ inline void NODE_SET_PROTOTYPE_METHOD(v8::Local<v8::FunctionTemplate> recv,
 }
 #define NODE_SET_PROTOTYPE_METHOD node::NODE_SET_PROTOTYPE_METHOD
 
-enum encoding {ASCII, UTF8, BASE64, UCS2, LATIN1, BINARY, HEX, BUFFER};
+// BINARY is a deprecated alias of LATIN1.
+enum encoding {ASCII, UTF8, BASE64, UCS2, BINARY, HEX, BUFFER, LATIN1 = BINARY};
+
 NODE_EXTERN enum encoding ParseEncoding(
     v8::Isolate* isolate,
     v8::Local<v8::Value> encoding_v,

src/string_bytes.cc

@@ -272,7 +272,6 @@ size_t StringBytes::Write(Isolate* isolate,
   switch (encoding) {
     case ASCII:
     case LATIN1:
-    case BINARY:
       if (is_extern && str->IsOneByte()) {
         memcpy(buf, data, nbytes);
       } else {
@@ -377,8 +376,7 @@ size_t StringBytes::StorageSize(Isolate* isolate,
   size_t data_size = 0;
   bool is_buffer = Buffer::HasInstance(val);
 
-  if (is_buffer &&
-      (encoding == BUFFER || encoding == BINARY || encoding == LATIN1)) {
+  if (is_buffer && (encoding == BUFFER || encoding == LATIN1)) {
     return Buffer::Length(val);
   }
 
@@ -387,7 +385,6 @@ size_t StringBytes::StorageSize(Isolate* isolate,
   switch (encoding) {
     case ASCII:
     case LATIN1:
-    case BINARY:
       data_size = str->Length();
       break;
 
@@ -428,8 +425,7 @@ size_t StringBytes::Size(Isolate* isolate,
   size_t data_size = 0;
   bool is_buffer = Buffer::HasInstance(val);
 
-  if (is_buffer &&
-      (encoding == BUFFER || encoding == BINARY || encoding == LATIN1))
+  if (is_buffer && (encoding == BUFFER || encoding == LATIN1))
     return Buffer::Length(val);
 
   const char* data;
@@ -441,7 +437,6 @@ size_t StringBytes::Size(Isolate* isolate,
   switch (encoding) {
     case ASCII:
     case LATIN1:
-    case BINARY:
       data_size = str->Length();
       break;
 
@@ -645,7 +640,6 @@ Local<Value> StringBytes::Encode(Isolate* isolate,
       break;
 
     case LATIN1:
-    case BINARY:
       if (buflen < EXTERN_APEX)
         val = OneByteString(isolate, buf, buflen);
       else

test/addons/parse-encoding/binding.cc

@@ -12,6 +12,8 @@ namespace {
   V(UCS2)               \
   V(UTF8)               \
 
+static_assert(node::BINARY == node::LATIN1, "BINARY == LATIN1");
+
 void ParseEncoding(const v8::FunctionCallbackInfo<v8::Value>& args) {
   const node::encoding encoding =
       node::ParseEncoding(args.GetIsolate(), args[0],