Move and refactor util packages

.gitignore

@@ -0,0 +1,15 @@
+# Toolchain
+# Goland project folder
+.idea/
+# Visual Studio Code
+.vscode/
+# emacs/vim
+GPATH
+GRTAGS
+GTAGS
+TAGS
+tags
+cscope.*
+# mac
+.DS_Store
+

.golangci.yml

@@ -0,0 +1,331 @@
+# This file contains all available configuration options
+# with their default values.
+# options for analysis running
+run:
+  # default concurrency is a available CPU number
+  concurrency: 4
+  # timeout for analysis, e.g. 30s, 5m, default is 1m
+  timeout: 1m
+  # exit code when at least one issue was found, default is 1
+  issues-exit-code: 1
+  # include test files or not, default is true
+  tests: true
+  # list of build tags, all linters use it. Default is empty list.
+  build-tags:
+  # which dirs to skip: issues from them won't be reported;
+  # can use regexp here: generated.*, regexp is applied on full path;
+  # default value is empty list, but default dirs are skipped independently
+  # from this option's value (see skip-dirs-use-default).
+  # "/" will be replaced by current OS file path separator to properly work
+  # on Windows.
+  skip-dirs:
+  # default is true. Enables skipping of directories:
+  #   vendor$, third_party$, testdata$, examples$, Godeps$, builtin$
+  skip-dirs-use-default: true
+  # which files to skip: they will be analyzed, but issues from them
+  # won't be reported. Default value is empty list, but there is
+  # no need to include all autogenerated files, we confidently recognize
+  # autogenerated files. If it's not please let us know.
+  # "/" will be replaced by current OS file path separator to properly work
+  # on Windows.
+  skip-files:
+    - "api_.*\\.go$"
+    - "model_.*\\.go$"
+    - "routers.go"
+    - "client.go"
+    - "configuration.go"
+    - "nas.go"
+  # by default isn't set. If set we pass it to "go list -mod={option}". From "go help modules":
+  # If invoked with -mod=readonly, the go command is disallowed from the implicit
+  # automatic updating of go.mod described above. Instead, it fails when any changes
+  # to go.mod are needed. This setting is most useful to check that go.mod does
+  # not need updates, such as in a continuous integration and testing system.
+  # If invoked with -mod=vendor, the go command assumes that the vendor
+  # directory holds the correct copies of dependencies and ignores
+  # the dependency descriptions in go.mod.
+  #modules-download-mode: readonly|release|vendor
+  # Allow multiple parallel golangci-lint instances running.
+  # If false (default) - golangci-lint acquires file lock on start.
+  allow-parallel-runners: true
+# output configuration options
+output:
+  # colored-line-number|line-number|json|tab|checkstyle|code-climate, default is "colored-line-number"
+  format: colored-line-number
+  # print lines of code with issue, default is true
+  print-issued-lines: true
+  # print linter name in the end of issue text, default is true
+  print-linter-name: true
+  # make issues output unique by line, default is true
+  uniq-by-line: true
+# all available settings of specific linters
+linters-settings:
+  errcheck:
+    # report about not checking of errors in type assertions: `a := b.(MyStruct)`;
+    # default is false: such cases aren't reported by default.
+    check-type-assertions: false
+    # report about assignment of errors to blank identifier: `num, _ := strconv.Atoi(numStr)`;
+    # default is false: such cases aren't reported by default.
+    check-blank: true
+    # [deprecated] comma-separated list of pairs of the form pkg:regex
+    # the regex is used to ignore names within pkg. (default "fmt:.*").
+    # see https://github.com/kisielk/errcheck#the-deprecated-method for details
+    #ignore: fmt:.*,io/ioutil:^Read.*
+    # path to a file containing a list of functions to exclude from checking
+    # see https://github.com/kisielk/errcheck#excluding-functions for details
+    #exclude: /path/to/file.txt
+  funlen:
+    lines: 60
+    statements: 40
+  gocognit:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 10
+  nestif:
+    # minimal complexity of if statements to report, 5 by default
+    min-complexity: 4
+  goconst:
+    # minimal length of string constant, 3 by default
+    min-len: 3
+    # minimal occurrences count to trigger, 3 by default
+    min-occurrences: 3
+  gocritic:
+    # Which checks should be enabled; can't be combined with 'disabled-checks';
+    # See https://go-critic.github.io/overview#checks-overview
+    # To check which checks are enabled run `GL_DEBUG=gocritic golangci-lint run`
+    # By default list of stable checks is used.
+    enabled-checks:
+      #- rangeValCopy
+    # Which checks should be disabled; can't be combined with 'enabled-checks'; default is empty
+    disabled-checks:
+      - regexpMust
+    # Enable multiple checks by tags, run `GL_DEBUG=gocritic golangci-lint run` to see all tags and checks.
+    # Empty list by default. See https://github.com/go-critic/go-critic#usage -> section "Tags".
+    enabled-tags:
+      - performance
+    disabled-tags:
+      - experimental
+    settings: # settings passed to gocritic
+      captLocal: # must be valid enabled check name
+        paramsOnly: true
+      rangeValCopy:
+        sizeThreshold: 32
+  gocyclo:
+    # minimal code complexity to report, 30 by default (but we recommend 10-20)
+    min-complexity: 10
+  godox:
+    # report any comments starting with keywords, this is useful for TODO or FIXME comments that
+    # might be left in the code accidentally and should be resolved before merging
+    keywords: # default keywords are TODO, BUG, and FIXME, these can be overwritten by this setting
+      #- TODO
+      - FIXME
+      - BUG
+      #- NOTE
+      #- OPTIMIZE # marks code that should be optimized before merging
+      #- HACK # marks hack-arounds that should be removed before merging
+      - XXX # Fatal! Important problem
+  gofmt:
+    # simplify code: gofmt with `-s` option, true by default
+    simplify: true
+  goimports:
+    # put imports beginning with prefix after 3rd-party packages;
+    # it's a comma-separated list of prefixes
+    local-prefixes: github.com/org/project
+  golint:
+    # minimal confidence for issues, default is 0.8
+    min-confidence: 0.8
+  gomnd:
+    settings:
+      mnd:
+        # the list of enabled checks, see https://github.com/tommy-muehle/go-mnd/#checks for description.
+        checks: argument,case,condition,operation,return,assign
+  gomodguard:
+    allowed:
+      modules:                                                        # List of allowed modules
+        # - gopkg.in/yaml.v2
+      domains:                                                        # List of allowed module domains
+        # - golang.org
+    blocked:
+      modules:                                                        # List of blocked modules
+        # - github.com/uudashr/go-module:                             # Blocked module
+        #     recommendations:                                        # Recommended modules that should be used instead (Optional)
+        #       - golang.org/x/mod
+        #     reason: "`mod` is the official go.mod parser library."  # Reason why the recommended module should be used (Optional)
+      versions:                                                       # List of blocked module version constraints
+        # - github.com/mitchellh/go-homedir:                          # Blocked module with version constraint
+        #     version: "< 1.1.0"                                      # Version constraint, see https://github.com/Masterminds/semver#basic-comparisons
+        #     reason: "testing if blocked version constraint works."  # Reason why the version constraint exists. (Optional)
+  govet:
+    # report about shadowed variables
+    check-shadowing: true
+    # settings per analyzer
+    settings:
+      printf: # analyzer name, run `go tool vet help` to see all analyzers
+        funcs: # run `go tool vet help printf` to see available settings for `printf` analyzer
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Infof
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Warnf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Errorf
+          - (github.com/golangci/golangci-lint/pkg/logutils.Log).Fatalf
+    # enable or disable analyzers by name
+    enable:
+      - atomicalign
+    enable-all: false
+    disable:
+      - shadow
+    disable-all: false
+  depguard:
+    list-type: blacklist
+    include-go-root: false
+    packages:
+      - github.com/sirupsen/logrus
+    packages-with-error-message:
+      # specify an error message to output when a blacklisted package is used
+      - github.com/sirupsen/logrus: "logging is allowed only by logutils.Log"
+  lll:
+    # max line length, lines longer will be reported. Default is 120.
+    # '\t' is counted as 1 character by default, and can be changed with the tab-width option
+    line-length: 120
+    # tab width in spaces. Default to 1.
+    tab-width: 1
+  maligned:
+    # print struct with more effective memory layout or not, false by default
+    suggest-new: true
+  nakedret:
+    # make an issue if func has more lines of code than this setting and it has naked returns; default is 30
+    max-func-lines: 30
+  testpackage:
+    # regexp pattern to skip files
+    skip-regexp: (export|internal)_test\.go
+  unused:
+    # treat code as a program (not a library) and report unused exported identifiers; default is false.
+    # XXX: if you enable this setting, unused will report a lot of false-positives in text editors:
+    # if it's called for subdir of a project it can't find funcs usages. All text editor integrations
+    # with golangci-lint call it on a directory with the changed file.
+    check-exported: false
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+  gci:
+    local-prefixes: "github.com/free5gc"
+  misspell:
+    #locale: US
+    ignore-words:
+  whitespace:
+    multi-if: false   # Enforces newlines (or comments) after every multi-line if statement
+    multi-func: false # Enforces newlines (or comments) after every multi-line function signature
+  wsl:
+    # If true append is only allowed to be cuddled if appending value is
+    # matching variables, fields or types on line above. Default is true.
+    strict-append: true
+    # Allow calls and assignments to be cuddled as long as the lines have any
+    # matching variables, fields or types. Default is true.
+    allow-assign-and-call: true
+    # Allow multiline assignments to be cuddled. Default is true.
+    allow-multiline-assign: true
+    # Allow declarations (var) to be cuddled.
+    allow-cuddle-declarations: false
+    # Allow trailing comments in ending of blocks
+    allow-trailing-comment: true
+    # Force newlines in end of case at this limit (0 = never).
+    force-case-trailing-whitespace: 0
+    # Force cuddling of err checks with err var assignment
+    force-err-cuddling: false
+    # Allow leading comments to be separated with empty liens
+    allow-separated-leading-comment: false
+  custom:
+    # Each custom linter should have a unique name.
+
+linters:
+  enable:
+    - gofmt
+    - govet
+    - errcheck
+    - staticcheck
+    - unused
+    - gosimple
+    - structcheck
+    - varcheck
+    - ineffassign
+    - deadcode
+    - typecheck
+    # Additional
+    - lll
+    - godox
+    #- gomnd
+    #- goconst
+    # - gocognit
+    # - maligned
+    # - nestif
+    # - gomodguard
+    - nakedret
+    - gci
+    - misspell
+    - gofumpt
+    - whitespace
+    - unconvert
+    - predeclared
+    - noctx
+    - dogsled
+    - bodyclose
+    - asciicheck
+      #- stylecheck
+      # - unparam
+      # - wsl
+
+  #disable-all: false
+  fast: true
+issues:
+  # List of regexps of issue texts to exclude, empty list by default.
+  # But independently from this option we use default exclude patterns,
+  # it can be disabled by `exclude-use-default: false`. To list all
+  # excluded by default patterns execute `golangci-lint run --help`
+  exclude:
+  # Excluding configuration per-path, per-linter, per-text and per-source
+  exclude-rules:
+    # Exclude some linters from running on tests files.
+  # Independently from option `exclude` we use default exclude patterns,
+  # it can be disabled by this option. To list all
+  # excluded by default patterns execute `golangci-lint run --help`.
+  # Default value for this option is true.
+  exclude-use-default: false
+  # The default value is false. If set to true exclude and exclude-rules
+  # regular expressions become case sensitive.
+  exclude-case-sensitive: false
+  # The list of ids of default excludes to include or disable. By default it's empty.
+  include:
+    #- EXC0002 # disable excluding of issues about comments from golint
+  # Maximum issues count per one linter. Set to 0 to disable. Default is 50.
+  #max-issues-per-linter: 0
+  # Maximum count of issues with the same text. Set to 0 to disable. Default is 3.
+  #max-same-issues: 0
+  # Show only new issues: if there are unstaged changes or untracked files,
+  # only those changes are analyzed, else only changes in HEAD~ are analyzed.
+  # It's a super-useful option for integration of golangci-lint into existing
+  # large codebase. It's not practical to fix all existing issues at the moment
+  # of integration: much better don't allow issues in new code.
+  # Default is false.
+  new: false
+  # Show only new issues created after git revision `REV`
+  new-from-rev: ""
+  # Show only new issues created in git patch with set file path.
+  #new-from-patch: path/to/patch/file
+severity:
+  # Default value is empty string.
+  # Set the default severity for issues. If severity rules are defined and the issues
+  # do not match or no severity is provided to the rule this will be the default
+  # severity applied. Severities should match the supported severity names of the
+  # selected out format.
+  # - Code climate: https://docs.codeclimate.com/docs/issues#issue-severity
+  # -   Checkstyle: https://checkstyle.sourceforge.io/property_types.html#severity
+  # -       Github: https://help.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-error-message
+  default-severity: error
+  # The default value is false.
+  # If set to true severity-rules regular expressions become case sensitive.
+  case-sensitive: false
+  # Default value is empty list.
+  # When a list of severity rules are provided, severity information will be added to lint
+  # issues. Severity rules have the same filtering capability as exclude rules except you
+  # are allowed to specify one matcher per severity rule.
+  # Only affects out formats that support setting severity information.
+  rules:
+    - linters:
+      - gomnd
+      severity: ignore

LICENSE → LICENSE.txt

@@ -1,3 +1,4 @@
+
                                  Apache License
                            Version 2.0, January 2004
                         http://www.apache.org/licenses/
@@ -186,7 +187,7 @@
       same "printed page" as the copyright notice for easier
       identification within third-party archives.
 
-   Copyright [yyyy] [name of copyright owner]
+   Copyright 2019 Communication Service/Software Laboratory, National Chiao Tung University
 
    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
@@ -198,4 +199,4 @@
    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.
+   limitations under the License.