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src/sql/engine/expr/ob_expr_int2ip.cpp

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+/**
+ * Copyright (c) 2021 OceanBase
+ * OceanBase CE is licensed under Mulan PubL v2.
+ * You can use this software according to the terms and conditions of the Mulan PubL v2.
+ * You may obtain a copy of Mulan PubL v2 at:
+ *          http://license.coscl.org.cn/MulanPubL-2.0
+ * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
+ * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
+ * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
+ * See the Mulan PubL v2 for more details.
+ */
+
+#define USING_LOG_PREFIX SQL_ENG
+#include <string.h>
+#include "sql/parser/ob_item_type.h"
+#include "sql/engine/expr/ob_expr_int2ip.h"
+//#include "sql/engine/expr/ob_expr_promotion_util.h"
+
+using namespace oceanbase::common;
+
+namespace oceanbase {
+namespace sql {
+
+ObExprInt2ip::ObExprInt2ip(ObIAllocator& alloc) : ObStringExprOperator(alloc, T_FUN_SYS_INT2IP, N_INT2IP, 1)
+{}
+
+ObExprInt2ip::~ObExprInt2ip()
+{}
+
+int ObExprInt2ip::calc(ObObj& result, const ObObj& text, common::ObExprStringBuf& string_buf)
+{
+  int ret = OB_SUCCESS;
+  if (text.is_null()) {
+    result.set_null();
+  } else {
+    TYPE_CHECK(text, ObIntType);
+    int64_t int_val = text.get_int();
+    if (OB_FAIL(int2ip(result, int_val, string_buf))) {
+      LOG_WARN("fail to convert int 2 ip", K(ret), K(int_val));
+    }
+  }
+  return ret;
+}
+
+int ObExprInt2ip::calc_result1(ObObj& result, const ObObj& text, ObExprCtx& expr_ctx) const
+{
+  int ret = OB_SUCCESS;
+  if (OB_ISNULL(expr_ctx.calc_buf_)) {
+    ret = OB_NOT_INIT;
+    LOG_WARN("varchar buffer not init", K(ret));
+  } else if (OB_FAIL(calc(result, text, *expr_ctx.calc_buf_))) {
+    LOG_WARN("fail to calc", K(ret), K(text));
+  } else if (OB_LIKELY(!result.is_null())) {
+    result.set_collation_type(result_type_.get_collation_type());
+    result.set_collation_level(result_type_.get_collation_level());
+  } else {
+  }
+  return ret;
+}
+
+int ObExprInt2ip::int2ip(ObObj& result, const int64_t int_val, ObExprStringBuf& string_buf)
+{
+  int ret = OB_SUCCESS;
+  ObString str_result;
+  char* buf = static_cast<char*>(string_buf.alloc(16));
+  if (OB_ISNULL(buf)) {
+    result.set_null();
+    ret = OB_ALLOCATE_MEMORY_FAILED;
+    LOG_ERROR("alloc memory failed", K(ret));
+  } else {
+    if ((int_val >> 32) > 0 || int_val < 0) {
+      result.set_null();
+    } else {
+      in_addr addr;
+      addr.s_addr = htonl(static_cast<uint32_t>(int_val));
+      const char* iret = inet_ntop(AF_INET, &addr, buf, 16);
+      if (OB_ISNULL(iret)) {
+        ret = OB_ERR_UNEXPECTED;
+        LOG_ERROR("fail to inet_ntop", K(ret), K(int_val), K(addr.s_addr));
+      } else {
+        str_result.assign_ptr(buf, static_cast<ObString::obstr_size_t>(strlen(buf)));
+        result.set_varchar(str_result);
+      }
+    }
+  }
+  return ret;
+}
+
+int ObExprInt2ip::int2ip(ObDatum& result, const int64_t int_val)
+{
+  int ret = OB_SUCCESS;
+  ObString str_result = result.get_string();
+  char* buf = str_result.ptr();
+  if ((int_val >> 32) > 0 || int_val < 0) {
+    result.set_null();
+  } else {
+    in_addr addr;
+    addr.s_addr = htonl(static_cast<uint32_t>(int_val));
+    const char* iret = inet_ntop(AF_INET, &addr, buf, 16);
+    if (OB_ISNULL(iret)) {
+      ret = OB_ERR_UNEXPECTED;
+      LOG_ERROR("fail to inet_ntop", K(ret), K(int_val), K(addr.s_addr));
+    } else {
+      str_result.assign_ptr(buf, static_cast<ObString::obstr_size_t>(strlen(buf)));
+      result.set_string(str_result);
+    }
+  }
+
+  return ret;
+}
+
+int ObExprInt2ip::cg_expr(ObExprCGCtx& op_cg_ctx, const ObRawExpr& raw_expr, ObExpr& rt_expr) const
+{
+  UNUSED(op_cg_ctx);
+  UNUSED(raw_expr);
+  int ret = OB_SUCCESS;
+  if (rt_expr.arg_cnt_ != 1) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_WARN("int2ip expr should have one param", K(ret), K(rt_expr.arg_cnt_));
+  } else if (OB_ISNULL(rt_expr.args_) || OB_ISNULL(rt_expr.args_[0])) {
+    ret = OB_ERR_UNEXPECTED;
+    LOG_WARN("children of int2ip expr is null", K(ret), K(rt_expr.args_));
+  } else {
+    CK(ObIntType == rt_expr.args_[0]->datum_meta_.type_);
+    rt_expr.eval_func_ = ObExprInt2ip::int2ip_varchar;
+  }
+  return ret;
+}
+
+int ObExprInt2ip::int2ip_varchar(const ObExpr& expr, ObEvalCtx& ctx, ObDatum& expr_datum)
+{
+  int ret = OB_SUCCESS;
+  if (OB_FAIL(expr.eval_param_value(ctx))) {
+    LOG_WARN("int2ip expr eval param value failed", K(ret));
+  } else {
+    ObDatum& text = expr.locate_param_datum(ctx, 0);
+    if (text.is_null()) {
+      expr_datum.set_null();
+    } else {
+      CK(expr.res_buf_len_ >= 16);
+      int64_t int_val = text.get_int();
+      if (OB_FAIL(int2ip(expr_datum, int_val))) {
+        LOG_WARN("fail to convert int 2 ip", K(ret), K(int_val));
+      }
+    }
+  }
+  return ret;
+}
+
+}  // namespace sql
+}  // namespace oceanbase