json: Make JSONToken opaque outside json-parser.c

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180823164025.12553-52-armbru@redhat.com>

include/qapi/qmp/json-parser.h

@@ -15,7 +15,11 @@
 #define QEMU_JSON_PARSER_H
 
 #include "qemu-common.h"
+#include "qapi/qmp/json-lexer.h"
 
+typedef struct JSONToken JSONToken;
+
+JSONToken *json_token(JSONTokenType type, int x, int y, GString *tokstr);
 QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp);
 
 #endif

include/qapi/qmp/json-streamer.h

@@ -16,13 +16,6 @@
 
 #include "qapi/qmp/json-lexer.h"
 
-typedef struct JSONToken {
-    int type;
-    int x;
-    int y;
-    char str[];
-} JSONToken;
-
 typedef struct JSONMessageParser
 {
     void (*emit)(void *opaque, QObject *json, Error *err);

qobject/json-parser.c

@@ -26,6 +26,13 @@
 #include "qapi/qmp/json-lexer.h"
 #include "qapi/qmp/json-streamer.h"
 
+struct JSONToken {
+    JSONTokenType type;
+    int x;
+    int y;
+    char str[];
+};
+
 typedef struct JSONParserContext
 {
     Error *err;
@@ -538,6 +545,18 @@ static QObject *parse_value(JSONParserContext *ctxt, va_list *ap)
     }
 }
 
+JSONToken *json_token(JSONTokenType type, int x, int y, GString *tokstr)
+{
+    JSONToken *token = g_malloc(sizeof(JSONToken) + tokstr->len + 1);
+
+    token->type = type;
+    memcpy(token->str, tokstr->str, tokstr->len);
+    token->str[tokstr->len] = 0;
+    token->x = x;
+    token->y = y;
+    return token;
+}
+
 QObject *json_parser_parse(GQueue *tokens, va_list *ap, Error **errp)
 {
     JSONParserContext ctxt = { .buf = tokens };

qobject/json-streamer.c

@@ -82,13 +82,7 @@ void json_message_process_token(JSONLexer *lexer, GString *input,
         goto out_emit;
     }
 
-    token = g_malloc(sizeof(JSONToken) + input->len + 1);
+    token = json_token(type, x, y, input);
-    token->type = type;
-    memcpy(token->str, input->str, input->len);
-    token->str[input->len] = 0;
-    token->x = x;
-    token->y = y;
-
     parser->token_size += input->len;
 
     g_queue_push_tail(&parser->tokens, token);