| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you 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 "util/parse-util.h" |
| #include "util/mem-info.h" |
| #include "util/string-parser.h" |
| |
| #include "common/names.h" |
| |
| namespace impala { |
| |
| int64_t ParseUtil::ParseMemSpec(const string& mem_spec_str, bool* is_percent, |
| int64_t relative_reference) { |
| *is_percent = false; |
| if (mem_spec_str.empty()) return 0; |
| |
| int64_t multiplier = -1; |
| int32_t number_str_len = mem_spec_str.size(); |
| |
| // Look for an accepted suffix such as "MB", "M", or "%". |
| string::const_reverse_iterator suffix_char = mem_spec_str.rbegin(); |
| if (*suffix_char == 'b' || *suffix_char == 'B') { |
| // Skip "B", the default is bytes anyways. |
| if (suffix_char == mem_spec_str.rend()) return -1; |
| suffix_char++; |
| number_str_len--; |
| } |
| switch (*suffix_char) { |
| case 't': |
| case 'T': |
| // Terabytes. |
| number_str_len--; |
| multiplier = 1024L * 1024L * 1024L * 1024L; |
| break; |
| case 'g': |
| case 'G': |
| // Gigabytes. |
| number_str_len--; |
| multiplier = 1024L * 1024L * 1024L; |
| break; |
| case 'm': |
| case 'M': |
| // Megabytes. |
| number_str_len--; |
| multiplier = 1024L * 1024L; |
| break; |
| case 'k': |
| case 'K': |
| // Kilobytes |
| number_str_len--; |
| multiplier = 1024L; |
| break; |
| case '%': |
| // Don't allow a suffix of "%B". |
| if (suffix_char != mem_spec_str.rbegin()) return -1; |
| number_str_len--; |
| *is_percent = true; |
| break; |
| // The default is bytes. If there was a trailing "B" it was handled above. |
| } |
| |
| StringParser::ParseResult result; |
| int64_t bytes; |
| if (multiplier != -1) { |
| // Parse float - MB or GB |
| double limit_val = StringParser::StringToFloat<double>(mem_spec_str.data(), |
| number_str_len, &result); |
| if (result != StringParser::PARSE_SUCCESS) return -1; |
| bytes = multiplier * limit_val; |
| } else { |
| // Parse int - bytes or percent |
| int64_t limit_val = StringParser::StringToInt<int64_t>(mem_spec_str.data(), |
| number_str_len, &result); |
| if (result != StringParser::PARSE_SUCCESS) return -1; |
| |
| if (*is_percent) { |
| bytes = (static_cast<double>(limit_val) / 100.0) * relative_reference; |
| } else { |
| bytes = limit_val; |
| } |
| } |
| // Accept -1 as indicator for infinite memory that we report by a 0 return value. |
| if (bytes == -1) { |
| return 0; |
| } |
| |
| return bytes; |
| } |
| |
| } |