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src/share/ob_list_parser.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 SHARE
+
+#include <string.h>
+#include <ctype.h>
+#include "ob_list_parser.h"
+#include "lib/ob_errno.h"
+#include "lib/utility/ob_macro_utils.h"
+#include "lib/oblog/ob_log.h"
+
+using namespace oceanbase::common;
+
+namespace oceanbase {
+namespace share {
+
+int ObListParser::match(int sym)
+{
+  int ret = OB_SUCCESS;
+  if (sym != token_) {
+    ret = OB_INVALID_ARGUMENT;
+  } else {
+    if (sym == SYM_VALUE && NULL != cb_) {
+      ret = cb_->match(value_buf_);
+    }
+    if (OB_SUCC(ret)) {
+      ret = get_token();
+    }
+  }
+  return ret;
+}
+
+int ObListParser::get_token()
+{
+  int ret = OB_SUCCESS;
+  while (OB_SUCC(ret)) {
+    if ('\0' == *cur_) {
+      token_ = SYM_END;
+      break;
+    } else if (SYM_LIST_SEP == *cur_) {
+      cur_++;
+      token_ = SYM_LIST_SEP;
+      break;
+    } else if (isspace(*cur_)) {
+      if (allow_space_) {
+        cur_++;  // Skip the spaces before and after the token
+      } else {
+        ret = OB_INVALID_ARGUMENT;
+      }
+    } else if (isprint(*cur_)) {
+      const char* start = cur_;
+      while (isprint(*cur_) && !isspace(*cur_) && SYM_LIST_SEP != *cur_ && '\0' != *cur_) {
+        cur_++;
+      }
+      if (cur_ - start >= MAX_TOKEN_SIZE) {
+        ret = OB_SIZE_OVERFLOW;
+        LOG_WARN("token size is too large", "actual", cur_ - start, K(ret));
+      } else {
+        STRNCPY(value_buf_, start, cur_ - start);
+        value_buf_[cur_ - start] = '\0';
+        token_ = SYM_VALUE;
+      }
+      break;
+    } else {
+      // Unknown character
+      ret = OB_INVALID_ARGUMENT;
+    }
+  }
+  return ret;
+}
+
+int ObListParser::parse(const char* data)
+{
+  int ret = OB_SUCCESS;
+  bool finish = false;
+  if (OB_ISNULL(data)) {
+    ret = OB_INVALID_ARGUMENT;
+    LOG_WARN("null data ptr", K(ret));
+  } else {
+    cur_ = data;
+    ret = get_token();
+  }
+  while (OB_SUCC(ret) && !finish) {
+    if (SYM_END == token_) {
+      if (OB_FAIL(match(SYM_END))) {
+        LOG_WARN("fail match SYM_END");
+      } else {
+        finish = true;
+      }
+    } else if (SYM_VALUE == token_) {
+      if (OB_FAIL(match(SYM_VALUE))) {
+        LOG_WARN("fail match value");
+      }
+    } else if (SYM_LIST_SEP == token_) {
+      if (OB_FAIL(match(SYM_LIST_SEP))) {
+        LOG_WARN("fail match SYM_LIST_SEP");
+      } else if (OB_FAIL(match(SYM_VALUE))) {
+        LOG_WARN("fail match value");
+      }
+    } else {
+      ret = OB_INVALID_ARGUMENT;
+    }
+  }
+  if (OB_SUCC(ret) && NULL != cb_) {
+    if (false == cb_->finish()) {
+      ret = OB_INVALID_ARGUMENT;
+      LOG_WARN("fail check parsed data", K(ret));
+    }
+  }
+  return ret;
+}
+
+}  // namespace share
+}  // namespace oceanbase