diff options
Diffstat (limited to 'deps/rabbit_common/src/rabbit_resource_monitor_misc.erl')
| -rw-r--r-- | deps/rabbit_common/src/rabbit_resource_monitor_misc.erl | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/deps/rabbit_common/src/rabbit_resource_monitor_misc.erl b/deps/rabbit_common/src/rabbit_resource_monitor_misc.erl new file mode 100644 index 0000000000..6661706998 --- /dev/null +++ b/deps/rabbit_common/src/rabbit_resource_monitor_misc.erl @@ -0,0 +1,39 @@ +%% This Source Code Form is subject to the terms of the Mozilla Public +%% License, v. 2.0. If a copy of the MPL was not distributed with this +%% file, You can obtain one at https://mozilla.org/MPL/2.0/. +%% +%% Copyright (c) 2007-2020 VMware, Inc. or its affiliates. All rights reserved. +%% + + +-module(rabbit_resource_monitor_misc). + +-export([parse_information_unit/1]). + +-spec parse_information_unit(integer() | string()) -> + {ok, integer()} | {error, parse_error}. + +parse_information_unit(Value) when is_integer(Value) -> {ok, Value}; +parse_information_unit(Value0) -> + Value = rabbit_data_coercion:to_list(Value0), + case re:run(Value, + "^(?<VAL>[0-9]+)(?<UNIT>kB|KB|MB|GB|kb|mb|gb|Kb|Mb|Gb|kiB|KiB|MiB|GiB|kib|mib|gib|KIB|MIB|GIB|k|K|m|M|g|G)?$", + [{capture, all_but_first, list}]) of + {match, [[], _]} -> + {ok, list_to_integer(Value)}; + {match, [Num]} -> + {ok, list_to_integer(Num)}; + {match, [Num, Unit]} -> + Multiplier = case Unit of + KiB when KiB =:= "k"; KiB =:= "kiB"; KiB =:= "K"; KiB =:= "KIB"; KiB =:= "kib" -> 1024; + MiB when MiB =:= "m"; MiB =:= "MiB"; MiB =:= "M"; MiB =:= "MIB"; MiB =:= "mib" -> 1024*1024; + GiB when GiB =:= "g"; GiB =:= "GiB"; GiB =:= "G"; GiB =:= "GIB"; GiB =:= "gib" -> 1024*1024*1024; + KB when KB =:= "KB"; KB =:= "kB"; KB =:= "kb"; KB =:= "Kb" -> 1000; + MB when MB =:= "MB"; MB =:= "mB"; MB =:= "mb"; MB =:= "Mb" -> 1000000; + GB when GB =:= "GB"; GB =:= "gB"; GB =:= "gb"; GB =:= "Gb" -> 1000000000 + end, + {ok, list_to_integer(Num) * Multiplier}; + nomatch -> + % log error + {error, parse_error} + end. |