1 files changed, 102 insertions, 0 deletions
diff --git a/sql/json_schema_helper.cc b/sql/json_schema_helper.cc
new file mode 100644
index 00000000000..e843b34b6b2
--- /dev/null
+++ b/sql/json_schema_helper.cc
@@ -0,0 +1,102 @@
+/* Copyright (c) 2016, 2022, MariaDB Corporation.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program 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 General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA */
+
+
+#include "mariadb.h"
+#include "sql_class.h"
+#include "sql_parse.h" // For check_stack_overrun
+#include <m_string.h>
+#include "json_schema_helper.h"
+
+
+bool json_key_equals(const char* key,  LEX_CSTRING val, int key_len)
+{
+  return (size_t)key_len == val.length && !strncmp(key, val.str, key_len);
+}
+
+bool json_assign_type(uint *curr_type, json_engine_t *je)
+{
+  const char* curr_value= (const char*)je->value;
+  int len= je->value_len;
+
+  if (json_key_equals(curr_value, { STRING_WITH_LEN("number") }, len))
+      *curr_type|= (1 << JSON_VALUE_NUMBER);
+  else if(json_key_equals(curr_value, { STRING_WITH_LEN("string") }, len))
+      *curr_type|= (1 << JSON_VALUE_STRING);
+  else if(json_key_equals(curr_value, { STRING_WITH_LEN("array") }, len))
+      *curr_type|= (1 << JSON_VALUE_ARRAY);
+  else if(json_key_equals(curr_value, { STRING_WITH_LEN("object") }, len))
+      *curr_type|= (1 << JSON_VALUE_OBJECT);
+  else if (json_key_equals(curr_value, { STRING_WITH_LEN("boolean") }, len))
+      *curr_type|= ((1 << JSON_VALUE_TRUE) | (1 << JSON_VALUE_FALSE));
+  else if (json_key_equals(curr_value, { STRING_WITH_LEN("null") }, len))
+      *curr_type|= (1 << JSON_VALUE_NULL);
+  else
+  {
+    my_error(ER_JSON_INVALID_VALUE_FOR_KEYWORD, MYF(0), "type");
+    return true;
+  }
+  return false;
+}
+
+uchar* get_key_name(const char *key_name, size_t *length,
+                    my_bool /* unused */)
+{
+  *length= strlen(key_name);
+  return (uchar*) key_name;
+}
+
+void json_get_normalized_string(json_engine_t *je, String *res,
+                                int *error)
+{
+  char *val_begin= (char*)je->value, *val_end;
+  String val;
+  DYNAMIC_STRING a_res;
+
+  if (init_dynamic_string(&a_res, NULL, 0, 0))
+    goto error;
+
+  if (!json_value_scalar(je))
+  {
+    if (json_skip_level(je))
+      goto error;
+  }
+
+  val_end= json_value_scalar(je) ? val_begin+je->value_len :
+                                   (char *)je->s.c_str;
+  val.set((const char*)val_begin, val_end-val_begin, je->s.cs);
+
+  if (je->value_type == JSON_VALUE_NUMBER ||
+      je->value_type == JSON_VALUE_ARRAY ||
+      je->value_type == JSON_VALUE_OBJECT)
+  {
+    if (json_normalize(&a_res, (const char*)val.ptr(),
+                       val_end-val_begin, je->s.cs))
+      goto error;
+  }
+  else if(je->value_type == JSON_VALUE_STRING)
+  {
+    strncpy((char*)a_res.str, val.ptr(), je->value_len);
+    a_res.length= je->value_len;
+  }
+
+  res->append(a_res.str, a_res.length, je->s.cs);
+  *error= 0;
+
+  error:
+  dynstr_free(&a_res);
+
+  return;
+}