Initial checkin of gRPC to third_party/

third_party/grpc/test/core/json/json_rewrite_test.c

Index: third_party/grpc/test/core/json/json_rewrite_test.c
diff --git a/third_party/grpc/test/core/json/json_rewrite_test.c b/third_party/grpc/test/core/json/json_rewrite_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..d99cb0dd03f804af22a3d807073ea7e4e58a99c6
--- /dev/null
+++ b/third_party/grpc/test/core/json/json_rewrite_test.c
@@ -0,0 +1,305 @@
+/*
+ *
+ * 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.
+ *
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/useful.h>
+#include <grpc/support/log.h>
+#include "test/core/util/test_config.h"
+
+#include "src/core/json/json_reader.h"
+#include "src/core/json/json_writer.h"
+
+typedef struct json_writer_userdata { FILE *cmp; } 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;
+  int did_eagain;
+} json_reader_userdata;
+
+static void json_writer_output_char(void *userdata, char c) {
+  json_writer_userdata *state = userdata;
+  int cmp = fgetc(state->cmp);
+
+  /* treat CRLF as LF */
+  if (cmp == '\r' && c == '\n') {
+    cmp = fgetc(state->cmp);
+  }
+  GPR_ASSERT(cmp == c);
+}
+
+static void json_writer_output_string(void *userdata, const char *str) {
+  while (*str) {
+    json_writer_output_char(userdata, *str++);
+  }
+}
+
+static void json_writer_output_string_with_len(void *userdata, const char *str,
+                                               size_t len) {
+  size_t i;
+  for (i = 0; i < len; i++) {
+    json_writer_output_char(userdata, str[i]);
+  }
+}
+
+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 = 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 = 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 = 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 <= 0x7ffu) {
+    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 = userdata;
+
+  if (!state->did_eagain) {
+    state->did_eagain = 1;
+    return GRPC_JSON_READ_CHAR_EAGAIN;
+  }
+
+  state->did_eagain = 0;
+
+  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 = userdata;
+  stacked_container *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 = 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 = 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 = 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 = 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 = userdata;
+
+  grpc_json_writer_value_raw_with_len(state->writer, "true", 4);
+}
+
+static void json_reader_set_false(void *userdata) {
+  json_reader_userdata *state = userdata;
+
+  grpc_json_writer_value_raw_with_len(state->writer, "false", 5);
+}
+
+static void json_reader_set_null(void *userdata) {
+  json_reader_userdata *state = 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_and_compare(FILE *in, FILE *cmp, 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;
+
+  GPR_ASSERT(in);
+  GPR_ASSERT(cmp);
+
+  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;
+  reader_user.did_eagain = 0;
+
+  writer_user.cmp = cmp;
+
+  grpc_json_writer_init(&writer, indent, &writer_vtable, &writer_user);
+  grpc_json_reader_init(&reader, &reader_vtable, &reader_user);
+
+  do {
+    status = grpc_json_reader_run(&reader);
+  } while (status == GRPC_JSON_EAGAIN);
+
+  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;
+}
+
+typedef struct test_file {
+  const char *input;
+  const char *cmp;
+  int indent;
+} test_file;
+
+static test_file test_files[] = {
+    {"test/core/json/rewrite_test_input.json",
+     "test/core/json/rewrite_test_output_condensed.json", 0},
+    {"test/core/json/rewrite_test_input.json",
+     "test/core/json/rewrite_test_output_indented.json", 2},
+    {"test/core/json/rewrite_test_output_indented.json",
+     "test/core/json/rewrite_test_output_condensed.json", 0},
+    {"test/core/json/rewrite_test_output_condensed.json",
+     "test/core/json/rewrite_test_output_indented.json", 2},
+};
+
+void test_rewrites() {
+  unsigned i;
+
+  for (i = 0; i < GPR_ARRAY_SIZE(test_files); i++) {
+    test_file *test = test_files + i;
+    FILE *input = fopen(test->input, "rb");
+    FILE *cmp = fopen(test->cmp, "rb");
+    int status;
+    gpr_log(GPR_INFO, "Testing file %s against %s using indent=%i", test->input,
+            test->cmp, test->indent);
+    status = rewrite_and_compare(input, cmp, test->indent);
+    GPR_ASSERT(status);
+    fclose(input);
+    fclose(cmp);
+  }
+}
+
+int main(int argc, char **argv) {
+  grpc_test_init(argc, argv);
+  test_rewrites();
+  gpr_log(GPR_INFO, "json_rewrite_test success");
+  return 0;
+}