added stub of json writer

lib/webfuse_provider/impl/json/writer.c

@@ -0,0 +1,170 @@
+#include "webfuse_provider/impl/json/writer.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define WFP_JSON_WRITER_MAX_LEVEL 8
+
+enum wfp_json_writer_state
+{
+    WFP_JSON_WRITER_STATE_INIT
+};
+
+struct wfp_json_writer
+{
+    enum wfp_json_writer_state state[WFP_JSON_WRITER_MAX_LEVEL];
+    size_t level;
+    size_t capacity;
+    size_t pre;
+    size_t offset;
+    char * data;
+    char * raw_data;
+};
+
+static void
+wfp_impl_json_writer_reserve(
+    struct wfp_json_writer * writer,
+    size_t needed)
+{
+    if ((writer->capacity - writer->offset) < needed)
+    {
+        size_t new_capacity = 2 * writer->capacity;
+
+        while ((new_capacity - writer->offset) < needed)
+        {
+            new_capacity *= 2;
+        }
+
+        writer->raw_data = realloc(writer->raw_data, writer->pre + new_capacity);
+        writer->data = &(writer->data[writer->pre]);
+        writer->capacity = new_capacity;
+    }
+}
+
+void
+wfp_impl_json_writer_write_raw_char(
+    struct wfp_json_writer * writer,
+    char value)
+{
+    writer->data[writer->offset] = value;
+    writer->offset++;
+}
+
+void
+wfp_impl_json_writer_write_raw(
+    struct wfp_json_writer * writer,
+    char const * value,
+    size_t length)
+{
+    memcpy(&(writer->data[writer->offset]), value, length);
+    writer->offset += length;
+}
+
+struct wfp_json_writer *
+wfp_impl_json_writer_create(
+    size_t initial_capacity,
+    size_t pre)
+{
+    struct wfp_json_writer * writer = malloc(sizeof(struct wfp_json_writer));
+    writer->level = 0;
+    writer->state[writer->level] = WFP_JSON_WRITER_STATE_INIT;
+    writer->pre = pre;
+    writer->capacity = initial_capacity;
+    writer->offset = 0;
+    writer->raw_data = malloc(writer->pre + writer->capacity);
+    writer->data = &(writer->raw_data[pre]);
+
+    return writer; 
+}
+
+void
+wfp_impl_json_writer_dispose(
+    struct wfp_json_writer * writer)
+{
+    free(writer->raw_data);
+    free(writer);
+}
+
+char *
+wfp_impl_json_writer_take_data(
+    struct wfp_json_writer * writer)
+{
+    wfp_impl_json_writer_reserve(writer, 1);    
+    writer->data[writer->offset] = '\0';
+
+    char * result = writer->raw_data;
+    writer->raw_data = NULL;
+
+    return result;
+}
+
+void
+wfp_impl_json_writer_write_int(
+    struct wfp_json_writer * writer,
+    int value)
+{
+
+}
+
+void
+wfp_impl_json_writer_write_string(
+    struct wfp_json_writer * writer,
+    char const * value)
+{
+    size_t length = strlen(value);
+    wfp_impl_json_writer_reserve(writer, length + 2);
+
+    wfp_impl_json_writer_write_raw_char(writer, '\"');
+    wfp_impl_json_writer_write_raw(writer, value, length);
+    wfp_impl_json_writer_write_raw_char(writer, '\"');
+
+}
+
+void
+wfp_impl_json_writer_write_bytes(
+    struct wfp_json_writer * writer,
+    char const * data,
+    size_t length)
+{
+
+}
+
+void
+wfp_impl_json_writer_object_begin(
+    struct wfp_json_writer * writer)
+{
+    wfp_impl_json_writer_reserve(writer, 1);
+    wfp_impl_json_writer_write_raw_char(writer, '{');
+}
+
+void
+wfp_impl_json_writer_object_end(
+    struct wfp_json_writer * writer)
+{
+    wfp_impl_json_writer_reserve(writer, 1);
+    wfp_impl_json_writer_write_raw_char(writer, '}');
+}
+
+void
+wfp_impl_json_writer_object_key(
+    struct wfp_json_writer * writer,
+    char const * key)
+{
+    wfp_impl_json_writer_reserve(writer, 1);
+    wfp_impl_json_writer_write_raw_char(writer, '[');
+}
+
+void
+wfp_impl_json_writer_array_begin(
+    struct wfp_json_writer * writer)
+{
+    wfp_impl_json_writer_reserve(writer, 1);
+    wfp_impl_json_writer_write_raw_char(writer, '[');
+}
+
+void
+wfp_impl_json_writer_array_end(
+    struct wfp_json_writer * writer)
+{
+    wfp_impl_json_writer_reserve(writer, 1);
+    wfp_impl_json_writer_write_raw_char(writer, ']');
+}

lib/webfuse_provider/impl/json/writer.h

@@ -0,0 +1,72 @@
+#ifndef WFP_IMPL_JSON_WRITER_H
+#define WFP_IMPL_JSON_WRTIER_H
+
+#ifndef __cplusplus
+#include <stddef.h>
+#else
+#include <cstddef.h>
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+struct wfp_json_writer;
+
+extern struct wfp_json_writer *
+wfp_impl_json_writer_create(
+    size_t initial_capacity,
+    size_t pre);
+
+extern void
+wfp_impl_json_writer_dispose(
+    struct wfp_json_writer * writer);
+
+extern char *
+wfp_impl_json_writer_take_data(
+    struct wfp_json_writer * writer);
+
+extern void
+wfp_impl_json_writer_write_int(
+    struct wfp_json_writer * writer,
+    int value);
+
+extern void
+wfp_impl_json_writer_write_string(
+    struct wfp_json_writer * writer,
+    char const * value);
+
+extern void
+wfp_impl_json_writer_write_bytes(
+    struct wfp_json_writer * writer,
+    char const * data,
+    size_t length);
+
+extern void
+wfp_impl_json_writer_object_begin(
+    struct wfp_json_writer * writer);
+
+extern void
+wfp_impl_json_writer_object_end(
+    struct wfp_json_writer * writer);
+
+extern void
+wfp_impl_json_writer_object_key(
+    struct wfp_json_writer * writer,
+    char const * key);
+
+extern void
+wfp_impl_json_writer_array_begin(
+    struct wfp_json_writer * writer);
+
+extern void
+wfp_impl_json_writer_array_end(
+    struct wfp_json_writer * writer);
+
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif

meson.build

@@ -29,6 +29,7 @@ webfuse_provider_static = static_library('webfuse_provider',
     'lib/webfuse_provider/impl/timer/manager.c',
     'lib/webfuse_provider/impl/timer/timepoint.c',
     'lib/webfuse_provider/impl/timer/timer.c',
+	'lib/webfuse_provider/impl/json/writer.c',
 	'lib/webfuse_provider/impl/jsonrpc/proxy.c',
 	'lib/webfuse_provider/impl/jsonrpc/proxy_variadic.c',
 	'lib/webfuse_provider/impl/jsonrpc/request.c',