objc4-787.1.tar.gz

[apple/objc4.git] / objcdt / json.h

diff --git a/objcdt/json.h b/objcdt/json.h
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+/*
+* Copyright (c) 2019 Apple Inc.  All Rights Reserved.
+*
+* @APPLE_LICENSE_HEADER_START@
+*
+* This file contains Original Code and/or Modifications of Original Code
+* as defined in and that are subject to the Apple Public Source License
+* Version 2.0 (the 'License'). You may not use this file except in
+* compliance with the License. Please obtain a copy of the License at
+* http://www.opensource.apple.com/apsl/ and read it before using this
+* file.
+*
+* The Original Code and all software distributed under the License are
+* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
+* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
+* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
+* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
+* Please see the License for the specific language governing rights and
+* limitations under the License.
+*
+* @APPLE_LICENSE_HEADER_END@
+*/
+
+#ifndef _OBJC_OBJCDT_JSON_H_
+#define _OBJC_OBJCDT_JSON_H_
+
+#include <cstdint>
+#include <cstdbool>
+#include <stdio.h>
+#include <functional>
+
+namespace json {
+
+enum context: uint8_t {
+    root,
+    array_value,
+    object_value,
+    object_key,
+    done,
+};
+
+class writer {
+private:
+    FILE *_file;
+    context _context;
+    int _depth;
+    bool _needs_comma;
+
+    void begin_value(int sep = '\0');
+    void advance(context old);
+    void key(const char *key);
+
+public:
+
+    writer(FILE *f);
+    ~writer();
+
+    void object(std::function<void()>);
+    void object(const char *key, std::function<void()>);
+
+    void array(std::function<void()>);
+    void array(const char *key, std::function<void()>);
+
+    void boolean(bool value);
+    void boolean(const char *key, bool value);
+
+    void number(uint64_t value);
+    void number(const char *key, uint64_t value);
+
+    void string(const char *s);
+    void string(const char *key, const char *s);
+
+    __printflike(2, 3)
+    void stringf(const char *fmt, ...);
+
+    __printflike(3, 4)
+    void stringf(const char *key, const char *fmt, ...);
+};
+
+}
+
+#endif /* _OBJC_OBJCDT_JSON_H_ */