| /* |
| * |
| * Copyright 2015, Google Inc. |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are |
| * met: |
| * |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following disclaimer |
| * in the documentation and/or other materials provided with the |
| * distribution. |
| * * Neither the name of Google Inc. nor the names of its |
| * contributors may be used to endorse or promote products derived from |
| * this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| * |
| */ |
| |
| /* The idea of the writer is basically symmetrical of the reader. While the |
| * reader emits various calls to your code, the writer takes basically the |
| * same calls and emit json out of it. It doesn't try to make any check on |
| * the order of the calls you do on it. Meaning you can theorically force |
| * it to generate invalid json. |
| * |
| * Also, unlike the reader, the writer expects UTF-8 encoded input strings. |
| * These strings will be UTF-8 validated, and any invalid character will |
| * cut the conversion short, before any invalid UTF-8 sequence, thus forming |
| * a valid UTF-8 string overall. |
| */ |
| |
| #ifndef GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H |
| #define GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H |
| |
| #include <stdlib.h> |
| |
| #include "src/core/json/json_common.h" |
| |
| typedef struct grpc_json_writer_vtable { |
| /* Adds a character to the output stream. */ |
| void (*output_char)(void *userdata, char); |
| /* Adds a zero-terminated string to the output stream. */ |
| void (*output_string)(void *userdata, const char *str); |
| /* Adds a fixed-length string to the output stream. */ |
| void (*output_string_with_len)(void *userdata, const char *str, size_t len); |
| |
| } grpc_json_writer_vtable; |
| |
| typedef struct grpc_json_writer { |
| void *userdata; |
| grpc_json_writer_vtable *vtable; |
| int indent; |
| int depth; |
| int container_empty; |
| int got_key; |
| } grpc_json_writer; |
| |
| /* Call this to initialize your writer structure. The indent parameter is |
| * specifying the number of spaces to use for indenting the output. If you |
| * use indent=0, then the output will not have any newlines either, thus |
| * emitting a condensed json output. |
| */ |
| void grpc_json_writer_init(grpc_json_writer *writer, int indent, |
| grpc_json_writer_vtable *vtable, void *userdata); |
| |
| /* Signals the beginning of a container. */ |
| void grpc_json_writer_container_begins(grpc_json_writer *writer, |
| grpc_json_type type); |
| /* Signals the end of a container. */ |
| void grpc_json_writer_container_ends(grpc_json_writer *writer, |
| grpc_json_type type); |
| /* Writes down an object key for the next value. */ |
| void grpc_json_writer_object_key(grpc_json_writer *writer, const char *string); |
| /* Sets a raw value. Useful for numbers. */ |
| void grpc_json_writer_value_raw(grpc_json_writer *writer, const char *string); |
| /* Sets a raw value with its length. Useful for values like true or false. */ |
| void grpc_json_writer_value_raw_with_len(grpc_json_writer *writer, |
| const char *string, size_t len); |
| /* Sets a string value. It'll be escaped, and utf-8 validated. */ |
| void grpc_json_writer_value_string(grpc_json_writer *writer, |
| const char *string); |
| |
| #endif /* GRPC_INTERNAL_CORE_JSON_JSON_WRITER_H */ |