json文本数据与obj互转 Autohotkey

本文来自于Thinkai’s Blog,thinkai也是我在ahk上面的引路人,对thinkai感兴趣的朋友请关注他的博客。
thinkai的博客简洁、有趣,即便是转载过来我也尽量保持作者原有的风格,主要是方便大家查阅。

json_fromobj( obj ) {
     
    If IsObject( obj )
    {
        isarray := 0 ; an empty object could be an array... but it ain't, says I
        for key in obj
            if ( key != ++isarray )
            {
                isarray := 0
                Break
            }
         
        for key, val in obj
            str .= ( A_Index = 1 ? "" : "," ) ( isarray ? "" : json_fromObj( key ) ":" ) json_fromObj( val )
         
        return isarray ? "[" str "]" : "{" str "}"
    }
    else if obj IS NUMBER
        return obj
    ;   else if obj IN null,true,false ; AutoHotkey does not natively distinguish these
    ;       return obj
     
    ; Encode control characters, starting with backslash.
    StringReplace, obj, obj, , \, A
    StringReplace, obj, obj, % Chr(08), b, A
    StringReplace, obj, obj, % A_Tab, t, A
    StringReplace, obj, obj, `n, n, A
    StringReplace, obj, obj, % Chr(12), f, A
    StringReplace, obj, obj, `r, r, A
    StringReplace, obj, obj, ", ", A
    StringReplace, obj, obj, /, /, A
    While RegexMatch( obj, "[^x20-x7e]", key )
    {
        str := Asc( key )
        val := "u" . Chr( ( ( str >> 12 ) & 15 ) + ( ( ( str >> 12 ) & 15 ) < 10 ? 48 : 55 ) )
        . Chr( ( ( str >> 8 ) & 15 ) + ( ( ( str >> 8 ) & 15 ) < 10 ? 48 : 55 ) )
        . Chr( ( ( str >> 4 ) & 15 ) + ( ( ( str >> 4 ) & 15 ) < 10 ? 48 : 55 ) )
        . Chr( ( str & 15 ) + ( ( str & 15 ) < 10 ? 48 : 55 ) )
        StringReplace, obj, obj, % key, % val, A
    }
    return """" obj """"
}
 
json_toobj(str){
     
    quot := """" ; firmcoded specifically for readability. Hardcode for (minor) performance gain
    ws := "`t`n`r " Chr(160) ; whitespace plus NBSP. This gets trimmed from the markup
    obj := {} ; dummy object
    objs := [] ; stack
    keys := [] ; stack
    isarrays := [] ; stack
    literals := [] ; queue
    y := nest := 0
     
    ; First pass swaps out literal strings so we can parse the markup easily
    StringGetPos, z, str, %quot% ; initial seek
    while !ErrorLevel
    {
        ; Look for the non-literal quote that ends this string. Encode literal backslashes as 'u005C' because the
        ; 'u..' entities are decoded last and that prevents literal backslashes from borking normal characters
        StringGetPos, x, str, %quot%,, % z + 1
        while !ErrorLevel
        {
            StringMid, key, str, z + 2, x - z - 1
            StringReplace, key, key, \, u005C, A
            If SubStr( key, 0 ) != ""
                Break
            StringGetPos, x, str, %quot%,, % x + 1
        }
        ;   StringReplace, str, str, %quot%%t%%quot%, %quot% ; this might corrupt the string
        str := ( z ? SubStr( str, 1, z ) : "" ) quot SubStr( str, x + 2 ) ; this won't
         
        ; Decode entities
        StringReplace, key, key, %quot%, %quot%, A
        StringReplace, key, key, b, % Chr(08), A
        StringReplace, key, key, t, % A_Tab, A
        StringReplace, key, key, n, `n, A
        StringReplace, key, key, f, % Chr(12), A
        StringReplace, key, key, r, `r, A
        StringReplace, key, key, /, /, A
        while y := InStr( key, "u", 0, y + 1 )
            if ( A_IsUnicode || Abs( "0x" SubStr( key, y + 2, 4 ) ) < 0x100 )
                key := ( y = 1 ? "" : SubStr( key, 1, y - 1 ) ) Chr( "0x" SubStr( key, y + 2, 4 ) ) SubStr( key, y + 6 )
         
        literals.insert(key)
         
        StringGetPos, z, str, %quot%,, % z + 1 ; seek
    }
     
    ; Second pass parses the markup and builds the object iteratively, swapping placeholders as they are encountered
    key := isarray := 1
     
    ; The outer loop splits the blob into paths at markers where nest level decreases
    Loop Parse, str, % "]}"
    {
        StringReplace, str, A_LoopField, [, [], A ; mark any array open-brackets
         
        ; This inner loop splits the path into segments at markers that signal nest level increases
        Loop Parse, str, % "[{"
        {
            ; The first segment might contain members that belong to the previous object
            ; Otherwise, push the previous object and key to their stacks and start a new object
            if ( A_Index != 1 )
            {
                objs.insert( obj )
                isarrays.insert( isarray )
                keys.insert( key )
                obj := {}
                isarray := key := Asc( A_LoopField ) = 93
            }
             
            ; arrrrays are made by pirates and they have index keys
            if ( isarray )
            {
                Loop Parse, A_LoopField, `,, % ws "]"
                    if ( A_LoopField != "" )
                        obj[key++] := A_LoopField = quot ? literals.remove(1) : A_LoopField
            }
            ; otherwise, parse the segment as key/value pairs
            else
            {
                Loop Parse, A_LoopField, `,
                    Loop Parse, A_LoopField, :, % ws
                        if ( A_Index = 1 )
                            key := A_LoopField = quot ? literals.remove(1) : A_LoopField
                else if ( A_Index = 2 && A_LoopField != "" )
                    obj[key] := A_LoopField = quot ? literals.remove(1) : A_LoopField
            }
            nest += A_Index > 1
        } ; Loop Parse, str, % "[{"
         
        If !--nest
            Break
         
        ; Insert the newly closed object into the one on top of the stack, then pop the stack
        pbj := obj
        obj := objs.remove()
        obj[key := keys.remove()] := pbj
        If ( isarray := isarrays.remove() )
            key++
         
    } ; Loop Parse, str, % "]}"
     
    Return obj
}

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