util

package module
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 Go to latest Published: Aug 30, 2017 License: MIT Imports: 23 Imported by: 0

README

util

util is some utilities used by me!

Documentation

Index

Constants

View Source 
const (
	Fcstart = 101
	Fcstop  = 102
	Fostart = 111
	Fostop  = 112
	Ffstart = 21
	Ffstop  = 22
)

code of string format

Variables

View Source 
var (
	// Sf is the alias of fmt.Sprintf
	Sf = fmt.Sprintf
	// Ff is the alias of fmt.Fprintf
	Ff = fmt.Fprintf
)
View Source 
var (

	// LogColorStringFuncs maps to a serious of [*]ColorString functions with key as golog.Level
	LogColorStringFuncs = map[string]func(a ...interface{}) string{

		"disable": fmt.Sprint,
		"error":   errorColorStr,
		"warn":    warnColorStr,
		"info":    infoColorStr,
		"debug":   debugColorStr,
		"debug2":  debugColorStr2,
		"debug3":  debugColorStr2,
		"goro":    goroColorStr,
	}

	// LogfMapFuncs are the maps of Glog functions
	LogfMapFuncs = map[string]func(string, ...interface{}){
		"error": Glog.Errorf,
		"warn":  Glog.Warnf,
		"info":  Glog.Infof,
		"debug": Glog.Debugf,
		"fatal": Glog.Fatalf,
	}

	// LogMapFuncs are the maps of Glog functions
	LogMapFuncs = map[string]func(...interface{}){
		"error": Glog.Error,
		"warn":  Glog.Warn,
		"info":  Glog.Info,
		"debug": Glog.Debug,
		"fatal": Glog.Fatal,
		"print": Glog.Print,
	}
)
View Source 
var (

	// Verbose activates display of messages on console
	Verbose = true

	// ColorsOn activates use of colors on console
	ColorsOn = true

	// Format is the format of message
	Format = map[int]string{

		Fcstart: "# Start to configure. -- %q\n",
		Fcstop:  "# Configuration has been concluded. -- %q\n",

		Fostart: "# Start to get case-options. -- %q\n",
		Fostop:  "# Case-options has been concluded. -- %q\n",

		Ffstart: "* Function %q start.\n",
		Ffstop:  "* Function %q stop.\n",
	}
)
View Source 
var (
	Pfstart = PfCyan
	Pfstop  = PfBlue
	Pfsep   = Pfdyel2
	Prun    = PfYel
	Pchk    = Pfgreen2
	Pstat   = Pfyel
	Plog    = Pf
	Pinfo   = Pfcyan2
	Pwarn   = Pforan
	Perr    = Pfred
	Pdebug  = Pfgreen2
)

specified function for output

View Source 
var (

	// Glog is a logger of golog
	Glog = golog.New() // Logger.Child("util")
)

Functions

func AlignToRight 

func AlignToRight(s string, size int) string

AlignToRight returns a string aligned to right

func AlignedString 

func AlignedString(str string, lenres int, filledChar string, alignFlag AlginedFlag) (res string)

AlignedString returns the aligned string what you want 

str 		: the original string
lenres 		: the length of `res` string
filledChar 	: fill `filedChar` in the spaces of `res` string
align		= 1 	: align at the left (default)
			= 0		: align at the center
			= -1	: align at the right

outputs 

res		: the aligned string

func Amax 

func Amax(x ...float64) (idx int, xmax float64, err error)

Amax return the maximum absolute value and the corressponding index of loation in x[]

func AppendToFile 

func AppendToFile(fn string, buffer ...*bytes.Buffer)

AppendToFile appends data to an existent (or new) file

func ArgsTable 

func ArgsTable(title string, data ...interface{}) string

ArgsTable prints a nice table with input arguments 

Input:
 title -- title of table; e.g. INPUT ARGUMENTS
 data  -- sets of THREE items in the following order:
               description, key, value, ...
               description, key, value, ...
                    ...
               description, key, value, ...

func ArgsTableN 

func ArgsTableN(title string, nledsp int, isleft bool, heads []string, data ...interface{}) string

ArgsTableN prints a nice table with input arguments 

 Input:
  title -- title of table; e.g. INPUT ARGUMENTS
	 heads -- heads of table; e.g. []string{ col1,  col2, ... }
	 nledsp -- length of leading spaces in every row
  data  -- sets of THREE items in the following order:
                column1, column2, column3, ...
                column1, column2, column3, ...
                     ...
                column1, column2, column3, ...

func Atob 

func Atob(val string) (bres bool)

Atob converts string to bool

func Atof 

func Atof(val string) (res float64)

Atof converts string to float64

func Atoi 

func Atoi(val string) (res int)

Atoi converts string to integer

func BtoStr 

func BtoStr(bs []byte) string

BtoStr convert []byte to string

func Btoa 

func Btoa(flag bool) string

Btoa converts flag to string 

Note: true  => "true"
      false => "false"

func Btoi 

func Btoi(flag bool) int

Btoi converts flag to interger 

Note: true  => 1
      false => 0

func BytesSizeToString 

func BytesSizeToString(byteCount int) string

BytesSizeToString convert bytes to a human-readable size

func CallerInfo 

func CallerInfo(idx int)

CallerInfo returns the file and line positions where an error occurred 

idx -- use idx=2 to get the caller of Panic

func CallerName 

func CallerName(idx int) string

CallerName return the name of function calling

func CheckErr 

func CheckErr(err error)

CheckErr check error

func CountChars 

func CountChars(str string) (nc, ne, n int)

CountChars returns the number of each other of chinses and english characters

func DblSf 

func DblSf(msg string, slice []float64) string

DblSf is the Sprintf for a slice of float64 (without brackets)

func DebugPrintCaller 

func DebugPrintCaller()

DebugPrintCaller print the name of function called and calling

func EnableLoggerOutToFile 

func EnableLoggerOutToFile(levelname string)

EnableLoggerOutToFile enables the "Glog" out to os.Stderr and os.File

func Err 

func Err(msg string, prm ...interface{}) error

Err returns a new error

func FieldValueFromTagMap 

func FieldValueFromTagMap(e interface{}, tag string, ignoredFields ...string) (out map[string]interface{}, err error)

FieldValueFromTagMap returns a string to interface map that uses as key the tag name, key: tag name for the given field value: the value of the field

func FieldValueMap 

func FieldValueMap(e interface{}, ignoredFields ...string) (out map[string]interface{}, err error)

FieldValueMap returns a string to interface map, key: field as defined on the struct value: the value of the field

func FnExt 

func FnExt(fn string) string

FnExt returns the extension of a file name. The extension is the suffix beginning at the final dot in the final element of path; it is empty if there is no dot.

func FnKey 

func FnKey(fn string) string

FnKey returns the file name key (without path and extension, if any)

func GetColStr 

func GetColStr(s string, size int, isleft bool) string

GetColStr return string use in field

func GetErrMessage 

func GetErrMessage(err error) string

GetErrMessage get error message if error

func GetFieldsInfo 

func GetFieldsInfo(obj interface{},
	tagname string,
	ignoreFields ...string) (fields, types, kinds, tags []string, err error)

GetFieldsInfo return information of fields

func GetSizes 

func GetSizes(h []string) []int

GetSizes is filled and returns len(e), e is element of slice h

func GetTags 

func GetTags(obj interface{}, tag string) map[string]string

GetTags returns map["Field"]="tag_value"

func GetTypes 

func GetTypes(obj interface{}) map[string]string

GetTypes returns map["Field"]="Type"

func Hstring 

func Hstring(str string, explen int, fillchar string, align int) (rstr string)

Hstring return the formatted string what you wants. parameters 

str 		: the original string
explen 		: the length of 'rstr' string
fillchar 	: fill 'fillchar' in the spaces of 'rstr' string
align		= 1 	: align at the left (default)
			= 0		: align at the center
			= -1	: align at the right

outputs 

rstr		: the return string
err			: the error if therer are errors

func Imax 

func Imax(a, b int) int

Imax returns the maximum value

func Imin 

func Imin(a, b int) int

Imin returns the minimum value

func InitLogger 

func InitLogger()

InitLogger initialize logger's environment

func IntRange 

func IntRange(args ...int) <-chan int

IntRange using args [start, stop, step] to generate a set of serial numbers

func IntSf 

func IntSf(msg string, slice []int) string

IntSf is the Sprintf for a slice of integers (without brackets)

func IsChineseChar 

func IsChineseChar(str string) bool

IsChineseChar judges whether the chinese character exists ?

func IsFileExist 

func IsFileExist(filename string) bool

IsFileExist checks whether a file exist

func Isum 

func Isum(vals ...int) int

Isum returns the summation

func Itob 

func Itob(val int) bool

Itob converts from integer to bool 

Note: only zero returns false
      anything else returns true

func LogColorString 

func LogColorString(levelname, s string) string

LogColorString gives a colorful string w.r.t. levelname

func Max 

func Max(a, b float64) float64

Max returns the maximum value

func Min 

func Min(a, b float64) float64

Min returns the minimum value

func Names 

func Names(e interface{}, ignoredFields ...string) (out []string, err error)

Names returns an array with all the field names (with the same order) as defined on the struct

func NamesFromTag 

func NamesFromTag(e interface{}, tag string, ignoredFields ...string) (out []string, err error)

NamesFromTag returns an array with all the tag names for each field

func NewLogFile 

func NewLogFile() (*os.File, error)

NewLogFile get a new logging file handler

func OpenFileR 

func OpenFileR(fn string) (fil *os.File, err error)

OpenFileR opens a file for reading data

func Panic 

func Panic(msg string, prm ...interface{})

Panic panicks

func PathKey 

func PathKey(fn string) string

PathKey returs the full path except the extension

func Pf 

func Pf(format string, prm ...interface{})

Pf prints formatted string

func PfBlue 

func PfBlue(format string, prm ...interface{})

PfBlue prints formatted string in high intensity blue

func PfCyan 

func PfCyan(format string, prm ...interface{})

PfCyan prints formatted string in high intensity cyan

func PfGreen 

func PfGreen(format string, prm ...interface{})

PfGreen prints formatted string in high intensity green

func PfMag 

func PfMag(format string, prm ...interface{})

PfMag prints formatted string in high intensity magenta

func PfRed 

func PfRed(format string, prm ...interface{})

PfRed prints formatted string in high intensity red

func PfWhite 

func PfWhite(format string, prm ...interface{})

PfWhite prints formatted string in high intensity white

func PfYel 

func PfYel(format string, prm ...interface{})

PfYel prints formatted string in high intensity yello

func Pfblue 

func Pfblue(format string, prm ...interface{})

Pfblue prints formatted string in blue

func Pfblue2 

func Pfblue2(format string, prm ...interface{})

Pfblue2 prints formatted string in another shade of blue

func Pfcyan 

func Pfcyan(format string, prm ...interface{})

Pfcyan prints formatted string in cyan

func Pfcyan2 

func Pfcyan2(format string, prm ...interface{})

Pfcyan2 prints formatted string in another shade of cyan

func Pfdgreen 

func Pfdgreen(format string, prm ...interface{})

Pfdgreen prints formatted string in dark green

func Pfdyel 

func Pfdyel(format string, prm ...interface{})

Pfdyel prints formatted string in dark yellow

func Pfdyel2 

func Pfdyel2(format string, prm ...interface{})

Pfdyel2 prints formatted string in another shade of dark yellow

func Pfgreen 

func Pfgreen(format string, prm ...interface{})

Pfgreen prints formatted string in green

func Pfgreen2 

func Pfgreen2(format string, prm ...interface{})

Pfgreen2 prints formatted string in another shade of green

func Pfgrey 

func Pfgrey(format string, prm ...interface{})

Pfgrey prints formatted string in grey

func Pfgrey2 

func Pfgrey2(format string, prm ...interface{})

Pfgrey2 prints formatted string in another shade of grey

func Pflmag 

func Pflmag(format string, prm ...interface{})

Pflmag prints formatted string in light magenta

func Pfmag 

func Pfmag(format string, prm ...interface{})

Pfmag prints formatted string in magenta

func Pforan 

func Pforan(format string, prm ...interface{})

Pforan prints formatted string in orange

func Pfpink 

func Pfpink(format string, prm ...interface{})

Pfpink prints formatted string in pink

func Pfpurple 

func Pfpurple(format string, prm ...interface{})

Pfpurple prints formatted string in purple

func Pfred 

func Pfred(format string, prm ...interface{})

Pfred prints formatted string in red

func Pfyel 

func Pfyel(format string, prm ...interface{})

Pfyel prints formatted string in yellow

func Pl 

func Pl()

Pl prints new line

func PrintSepline 

func PrintSepline(n int)

PrintSepline print the separate-line

func ReadFile 

func ReadFile(fn string) (b []byte, err error)

ReadFile reads bytes from a file

func ReadLines 

func ReadLines(b []byte, cb ReadLinesCallback)

ReadLines reads lines from a []byte and calls ReadLinesCallback to process each line being read

func ReadLinesFile 

func ReadLinesFile(fil *os.File, cb ReadLinesCallback) (oserr error)

ReadLinesFile reads lines from a file and calls ReadLinesCallback to process each line being read

func RemoveAll 

func RemoveAll(key string)

RemoveAll deletes all files matching filename specified by key (be careful)

func Rpad 

func Rpad(s string, padding int) string

Rpad adds padding to the right of a string.

func Spaces 

func Spaces(num int) string

Spaces returns the number of spaces

func SplitFloats 

func SplitFloats(str string) (res []float64)

SplitFloats splits space-separated float numbers

func SplitInts 

func SplitInts(str string) (res []int)

SplitInts splits space-separated integers

func SplitKeys 

func SplitKeys(keys string) []string

SplitKeys splits keys separeted by spaces

func SplitSpacesQuoted 

func SplitSpacesQuoted(str string) (res []string)

SplitSpacesQuoted splits string with quoted substrings. e.g. " a,b, 'c', \"d\" "

func SplitWithinParentheses 

func SplitWithinParentheses(s string) (res []string)

SplitWithinParentheses extracts arguments (substrings) within brackets e.g.: "(arg1, (arg2.1, arg2.2), arg3, arg4, (arg5.1,arg5.2, arg5.3 ) )"

func Startfunc 

func Startfunc(fid int)

Startfunc print the message at the start of function

func Stopfunc 

func Stopfunc(fid int)

Stopfunc print the message at the start of function

func StrSf 

func StrSf(msg string, slice []string) string

StrSf is the Sprintf for a slice of string (without brackets)

func StrSpaces 

func StrSpaces(n int) (l string)

StrSpaces returns a line with spaces

func StrThickLine 

func StrThickLine(n int) (l string)

StrThickLine returns a thick line (using '=')

func StrThinLine 

func StrThinLine(n int) (l string)

StrThinLine returns a thin line (using '-')

func StrValues 

func StrValues(e interface{}, ignoredFields ...string) ([]string, error)

StrValues returns an string array with all the values

func StrValuesWithFunc 

func StrValuesWithFunc(e interface{},
	cb ValuesCallback,
	ignoredFields ...string) (out []string, err error)

StrValuesWithFunc returns an interface array with all the string-values

func Sum 

func Sum(vals ...float64) float64

Sum returns the summation

func TodayFilename 

func TodayFilename() string

TodayFilename get a filename based on the date, file logs works that way the most times but these are just a sugar.

func Values 

func Values(e interface{}, ignoredFields ...string) (out []interface{}, err error)

Values returns an interface array with all the values

func ValuesWithFunc 

func ValuesWithFunc(e interface{},
	cb ValuesCallback,
	ignoredFields ...string) (out []interface{}, err error)

ValuesWithFunc returns an interface array with all the values

func WriteBytesToFile 

func WriteBytesToFile(fn string, b []byte)

WriteBytesToFile writes slice of bytes to a new file

func WriteFile 

func WriteFile(fn string, buffer ...*bytes.Buffer)

WriteFile writes data to a new file with given bytes.Buffer(s)

Types

type AlginedFlag 

type AlginedFlag int8

AlginedFlag is the type to assign align-format 

const (
	AlginedLeft AlginedFlag = iota
	AlginedMiddle
	AlignedRight
)

Align format

type FuncCallerInfo 

type FuncCallerInfo struct {
	PackageName string
	FileName    string
	FuncName    string
	Line        int
}

FuncCallerInfo describes the information of callers of function

func RetrieveCallerInfo 

func RetrieveCallerInfo(idx int) *FuncCallerInfo

RetrieveCallerInfo retrieve the information of callers of function

type ReadLinesCallback 

type ReadLinesCallback func(idx int, line string) (stop bool)

ReadLinesCallback is used in ReadLines to process line by line during reading of a file

type ValuesCallback 

type ValuesCallback func(f reflect.StructField, v interface{}) (value interface{}, isIgnored bool)

ValuesCallback is used in (Str)ValuesWithFunc to process line by line during retriving of 

a field-value
example:

var cb ValuesCallback = func(fieldName string, v interface{}) (value interface{}, isIgnored bool) { switch fieldName { case "Model", "Details": 

value, isIgnored = nil, true

case "UINumber": 

a := v.(string)
value, isIgnored = interface{}(a[0:2]+"-"+a[2:]), false

case "Date": 

value, isIgnored = interface{}(v.(time.Time).Format(ShortDateFormat)), false

case "Total": 

	value, isIgnored = interface{}(fmt.Sprintf("%.1f", v.(float64))), false
}

default: 

value, isIgnored = v, false

return value, isIgnored }

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