diff options
Diffstat (limited to 'test/core/json/json_rewrite.cc')
| -rw-r--r-- | test/core/json/json_rewrite.cc | 241 |
1 files changed, 241 insertions, 0 deletions
diff --git a/test/core/json/json_rewrite.cc b/test/core/json/json_rewrite.cc new file mode 100644 index 0000000000..98e76e9772 --- /dev/null +++ b/test/core/json/json_rewrite.cc @@ -0,0 +1,241 @@ +/* + * + * Copyright 2015 gRPC authors. + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + * + */ + +#include <stdio.h> +#include <stdlib.h> + +#include <grpc/support/alloc.h> +#include <grpc/support/cmdline.h> +#include <grpc/support/log.h> + +#include "src/core/lib/json/json_reader.h" +#include "src/core/lib/json/json_writer.h" + +typedef struct json_writer_userdata { + FILE* out; +} json_writer_userdata; + +typedef struct stacked_container { + grpc_json_type type; + struct stacked_container* next; +} stacked_container; + +typedef struct json_reader_userdata { + FILE* in; + grpc_json_writer* writer; + char* scratchpad; + char* ptr; + size_t free_space; + size_t allocated; + size_t string_len; + stacked_container* top; +} json_reader_userdata; + +static void json_writer_output_char(void* userdata, char c) { + json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata); + fputc(c, state->out); +} + +static void json_writer_output_string(void* userdata, const char* str) { + json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata); + fputs(str, state->out); +} + +static void json_writer_output_string_with_len(void* userdata, const char* str, + size_t len) { + json_writer_userdata* state = static_cast<json_writer_userdata*>(userdata); + fwrite(str, len, 1, state->out); +} + +grpc_json_writer_vtable writer_vtable = {json_writer_output_char, + json_writer_output_string, + json_writer_output_string_with_len}; + +static void check_string(json_reader_userdata* state, size_t needed) { + if (state->free_space >= needed) return; + needed -= state->free_space; + needed = (needed + 0xffu) & ~0xffu; + state->scratchpad = static_cast<char*>( + gpr_realloc(state->scratchpad, state->allocated + needed)); + state->free_space += needed; + state->allocated += needed; +} + +static void json_reader_string_clear(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + state->free_space = state->allocated; + state->string_len = 0; +} + +static void json_reader_string_add_char(void* userdata, uint32_t c) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + check_string(state, 1); + GPR_ASSERT(c < 256); + state->scratchpad[state->string_len++] = (char)c; +} + +static void json_reader_string_add_utf32(void* userdata, uint32_t c) { + if (c <= 0x7f) { + json_reader_string_add_char(userdata, c); + } else if (c <= 0x7ff) { + uint32_t b1 = 0xc0u | ((c >> 6u) & 0x1fu); + uint32_t b2 = 0x80u | (c & 0x3fu); + json_reader_string_add_char(userdata, b1); + json_reader_string_add_char(userdata, b2); + } else if (c <= 0xffffu) { + uint32_t b1 = 0xe0u | ((c >> 12u) & 0x0fu); + uint32_t b2 = 0x80u | ((c >> 6u) & 0x3fu); + uint32_t b3 = 0x80u | (c & 0x3fu); + json_reader_string_add_char(userdata, b1); + json_reader_string_add_char(userdata, b2); + json_reader_string_add_char(userdata, b3); + } else if (c <= 0x1fffffu) { + uint32_t b1 = 0xf0u | ((c >> 18u) & 0x07u); + uint32_t b2 = 0x80u | ((c >> 12u) & 0x3fu); + uint32_t b3 = 0x80u | ((c >> 6u) & 0x3fu); + uint32_t b4 = 0x80u | (c & 0x3fu); + json_reader_string_add_char(userdata, b1); + json_reader_string_add_char(userdata, b2); + json_reader_string_add_char(userdata, b3); + json_reader_string_add_char(userdata, b4); + } +} + +static uint32_t json_reader_read_char(void* userdata) { + int r; + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + + r = fgetc(state->in); + if (r == EOF) r = GRPC_JSON_READ_CHAR_EOF; + return (uint32_t)r; +} + +static void json_reader_container_begins(void* userdata, grpc_json_type type) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + stacked_container* container = + static_cast<stacked_container*>(gpr_malloc(sizeof(stacked_container))); + + container->type = type; + container->next = state->top; + state->top = container; + + grpc_json_writer_container_begins(state->writer, type); +} + +static grpc_json_type json_reader_container_ends(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + stacked_container* container = state->top; + + grpc_json_writer_container_ends(state->writer, container->type); + state->top = container->next; + gpr_free(container); + return state->top ? state->top->type : GRPC_JSON_TOP_LEVEL; +} + +static void json_reader_set_key(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + json_reader_string_add_char(userdata, 0); + + grpc_json_writer_object_key(state->writer, state->scratchpad); +} + +static void json_reader_set_string(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + json_reader_string_add_char(userdata, 0); + + grpc_json_writer_value_string(state->writer, state->scratchpad); +} + +static int json_reader_set_number(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + + grpc_json_writer_value_raw_with_len(state->writer, state->scratchpad, + state->string_len); + + return 1; +} + +static void json_reader_set_true(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + + grpc_json_writer_value_raw_with_len(state->writer, "true", 4); +} + +static void json_reader_set_false(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + + grpc_json_writer_value_raw_with_len(state->writer, "false", 5); +} + +static void json_reader_set_null(void* userdata) { + json_reader_userdata* state = static_cast<json_reader_userdata*>(userdata); + + grpc_json_writer_value_raw_with_len(state->writer, "null", 4); +} + +static grpc_json_reader_vtable reader_vtable = { + json_reader_string_clear, json_reader_string_add_char, + json_reader_string_add_utf32, json_reader_read_char, + json_reader_container_begins, json_reader_container_ends, + json_reader_set_key, json_reader_set_string, + json_reader_set_number, json_reader_set_true, + json_reader_set_false, json_reader_set_null}; + +int rewrite(FILE* in, FILE* out, int indent) { + grpc_json_writer writer; + grpc_json_reader reader; + grpc_json_reader_status status; + json_writer_userdata writer_user; + json_reader_userdata reader_user; + + reader_user.writer = &writer; + reader_user.in = in; + reader_user.top = NULL; + reader_user.scratchpad = NULL; + reader_user.string_len = 0; + reader_user.free_space = 0; + reader_user.allocated = 0; + + writer_user.out = out; + + grpc_json_writer_init(&writer, indent, &writer_vtable, &writer_user); + grpc_json_reader_init(&reader, &reader_vtable, &reader_user); + + status = grpc_json_reader_run(&reader); + + free(reader_user.scratchpad); + while (reader_user.top) { + stacked_container* container = reader_user.top; + reader_user.top = container->next; + free(container); + } + + return status == GRPC_JSON_DONE; +} + +int main(int argc, char** argv) { + int indent = 2; + gpr_cmdline* cl; + + cl = gpr_cmdline_create(NULL); + gpr_cmdline_add_int(cl, "indent", NULL, &indent); + gpr_cmdline_parse(cl, argc, argv); + gpr_cmdline_destroy(cl); + + return rewrite(stdin, stdout, indent) ? 0 : 1; +} |