json: remove json from public API

Part-of: <https://gitlab.freedesktop.org/pulseaudio/pulseaudio/-/merge_requests/570>

src/pulsecore/json.h

@@ -0,0 +1,110 @@
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2016 Arun Raghavan <mail@arunraghavan.net>
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as published
+  by the Free Software Foundation; either version 2.1 of the License,
+  or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public License
+  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
+***/
+
+#pragma once
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <pulsecore/hashmap.h>
+
+#define PA_DOUBLE_IS_EQUAL(x, y) (((x) - (y)) < 0.000001 && ((x) - (y)) > -0.000001)
+
+typedef enum {
+    PA_JSON_TYPE_INIT = 0,
+    PA_JSON_TYPE_NULL,
+    PA_JSON_TYPE_INT,
+    PA_JSON_TYPE_DOUBLE,
+    PA_JSON_TYPE_BOOL,
+    PA_JSON_TYPE_STRING,
+    PA_JSON_TYPE_ARRAY,
+    PA_JSON_TYPE_OBJECT,
+} pa_json_type;
+
+typedef struct pa_json_object pa_json_object;
+
+pa_json_object* pa_json_parse(const char *str);
+pa_json_type pa_json_object_get_type(const pa_json_object *obj);
+void pa_json_object_free(pa_json_object *obj);
+
+/* All pointer members that are returned are valid while the corresponding object is valid */
+
+int64_t pa_json_object_get_int(const pa_json_object *o);
+double pa_json_object_get_double(const pa_json_object *o);
+bool pa_json_object_get_bool(const pa_json_object *o);
+const char* pa_json_object_get_string(const pa_json_object *o);
+
+const pa_json_object* pa_json_object_get_object_member(const pa_json_object *o, const char *name);
+
+/** Returns pa_hashmap (char* -> const pa_json_object*) to iterate over object members. \since 15.0 */
+const pa_hashmap *pa_json_object_get_object_member_hashmap(const pa_json_object *o);
+
+int pa_json_object_get_array_length(const pa_json_object *o);
+const pa_json_object* pa_json_object_get_array_member(const pa_json_object *o, int index);
+
+bool pa_json_object_equal(const pa_json_object *o1, const pa_json_object *o2);
+
+/** @{ \name Write functions */
+
+/** Structure which holds a JSON encoder. Wrapper for pa_strbuf and encoder context. \since 15.0 */
+typedef struct pa_json_encoder pa_json_encoder;
+
+/** Create a new pa_json_encoder structure. \since 15.0 */
+pa_json_encoder *pa_json_encoder_new(void);
+/** Free a pa_json_encoder structure. \since 15.0 */
+void pa_json_encoder_free(pa_json_encoder *encoder);
+/** Convert pa_json_encoder to string, free pa_json_encoder structure.
+ * The returned string needs to be freed with pa_xree(). \since 15.0 */
+char *pa_json_encoder_to_string_free(pa_json_encoder *encoder);
+
+/** Start appending JSON object element by writing an opening brace. \since 15.0 */
+void pa_json_encoder_begin_element_object(pa_json_encoder *encoder);
+/** Start appending JSON object member to JSON object. \since 15.0 */
+void pa_json_encoder_begin_member_object(pa_json_encoder *encoder, const char *name);
+/** End appending JSON object element or member to JSON object. \since 15.0 */
+void pa_json_encoder_end_object(pa_json_encoder *encoder);
+/** Start appending JSON array element by writing an opening bracket. \since 15.0 */
+void pa_json_encoder_begin_element_array(pa_json_encoder *encoder);
+/** Start appending JSON array member to JSON object. \since 15.0 */
+void pa_json_encoder_begin_member_array(pa_json_encoder *encoder, const char *name);
+/** End appending JSON array element or member to JSON object. \since 15.0 */
+void pa_json_encoder_end_array(pa_json_encoder *encoder);
+/** Append null element to JSON. \since 15.0 */
+void pa_json_encoder_add_element_null(pa_json_encoder *encoder);
+/** Append null member to JSON object. \since 15.0 */
+void pa_json_encoder_add_member_null(pa_json_encoder *encoder, const char *name);
+/** Append boolean element to JSON. \since 15.0 */
+void pa_json_encoder_add_element_bool(pa_json_encoder *encoder, bool value);
+/** Append boolean member to JSON object. \since 15.0 */
+void pa_json_encoder_add_member_bool(pa_json_encoder *encoder, const char *name, bool value);
+/** Append string element to JSON. Value will be escaped. \since 15.0 */
+void pa_json_encoder_add_element_string(pa_json_encoder *encoder, const char *value);
+/** Append string member to JSON object. Value will be escaped. \since 15.0 */
+void pa_json_encoder_add_member_string(pa_json_encoder *encoder, const char *name, const char *value);
+/** Append integer element to JSON. \since 15.0 */
+void pa_json_encoder_add_element_int(pa_json_encoder *encoder, int64_t value);
+/** Append integer member to JSON object. \since 15.0 */
+void pa_json_encoder_add_member_int(pa_json_encoder *encoder, const char *name, int64_t value);
+/** Append double element to JSON. \since 15.0 */
+void pa_json_encoder_add_element_double(pa_json_encoder *encoder, double value, int precision);
+/** Append double member to JSON object. \since 15.0 */
+void pa_json_encoder_add_member_double(pa_json_encoder *encoder, const char *name, double value, int precision);
+/** Append raw json string element to JSON. String will be written as is. \since 15.0 */
+void pa_json_encoder_add_element_raw_json(pa_json_encoder *encoder, const char *raw_json_string);
+/** Append raw json string member to JSON object. String will be written as is. \since 15.0 */
+void pa_json_encoder_add_member_raw_json(pa_json_encoder *encoder, const char *name, const char *raw_json_string);