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#ifndef UDO_JSON
#define UDO_JSON ##
/*
JSON formatting and parsing
This file is part of the SONICS UDO collection by Richard Knight 2022
License: GPL-2.0-or-later
http://1bpm.net
*/
#include "/string_tools.udo"
#include "/array_tools.udo"
/*
Create a new empty JSON string
Sjson json_init
Sout empty JSON object/string
*/
opcode json_init, S, 0
xout "{}"
endop
/*
Append raw string to JSON string
Sout json_append Sjson, StoAppend
Sout string with appendage
Sjson input string to append to
StoAppend string to append
*/
opcode json_append, S, SS
Sjson, StoAppend xin
ilen strlen Sjson
Sjson = (ilen < 2) ? "{" : strsub(Sjson, 0, ilen-1)
Sout = sprintf("%s%s%s}", Sjson, (strlen(Sjson) == 1) ? "" : ",", StoAppend)
xout Sout
endop
/*
Append JSON object string to JSON object string with key
Sout json_appendobject Sjson, Skey, Svalue
Sout string with appendage
Sjson input string to append to
Skey key for appending
Svalue value for appending
*/
opcode json_appendobject, S, SSS
Sjson, Skey, Svalue xin
Sout = json_append(Sjson, sprintf("\"%s\":%s", Skey, Svalue))
xout Sout
endop
/*
Append string to JSON object string with key
Sout json_appendstring Sjson, Skey, Svalue
Sout string with quoted appendage
Sjson input string to append to
Skey key for appending
Svalue value for appending
*/
opcode json_appendstring, S, SSS
Sjson, Skey, Svalue xin
Sout = json_append(Sjson, sprintf("\"%s\":\"%s\"", Skey, Svalue))
xout Sout
endop
/*
Append numeric value to JSON object string with key
Sout json_appendvalue Sjson, Skey, ivalue
Sout string with appendage
Sjson input string to append to
Skey key for appending
ivalue value for appending
*/
opcode json_appendvalue, S, SSi
Sjson, Skey, ivalue xin
Sformat = (frac(ivalue) == 0) ? "\"%s\":%d" : "\"%s\":%f"
Sout = json_append(Sjson, sprintf(Sformat, Skey, ivalue))
xout Sout
endop
/*
Append numeric array to JSON object string with key
Sout json_appendarray Sjson, Skey, iarray[]
Sout string with appendage
Sjson input string to append to
Skey key for appending
iarray[] array for appending
*/
opcode json_appendarray, S, SSi[]o
Sjson, Skey, iarray[] xin
Sformatted = ""
ilen = lenarray(iarray)
index = 0
while (index < ilen) do
ivalue = iarray[index]
Sformat = (frac(ivalue) == 0) ? "%d" : "%f"
Sformatted strcat Sformatted, sprintf(Sformat, ivalue)
if (index != ilen - 1) then
Sformatted strcat Sformatted, ","
endif
index += 1
od
Sout = json_appendobject(Sjson, Skey, sprintf("[%s]", Sformatted))
xout Sout
endop
/*
Append string array to JSON object string with key
Sout json_appendarray Sjson, Skey, Sarray[]
Sout string with appendage
Sjson input string to append to
Skey key for appending
Sarray[] array for appending
iomitempty leave out empty strings
*/
opcode json_appendarray, S, SSS[]o
Sjson, Skey, Sarray[], iomitempty xin
Sformatted = ""
ilen = lenarray(Sarray)
index = 0
while (index < ilen) do
isempty = (strcmp(Sarray[index], "") == 0) ? 1 : 0
if ((iomitempty == 0 && isempty == 1) || isempty == 0) then
Sformatted strcat Sformatted, sprintf("\"%s\",", Sarray[index])
endif
index += 1
od
Sout = json_appendobject(Sjson, Skey, sprintf("[%s]", strsub(Sformatted, 0, strlen(Sformatted) - 1)))
xout Sout
endop
/*
Append f-table to JSON object string with key
Sout json_appendtable Sjson, Skey, ifn
Sout string with appendage
Sjson input string to append to
Skey key for appending
ifn f-table number
*/
opcode json_appendtable, S, SSi
Sjson, Skey, ifn xin
Sformatted = ""
ilen = ftlen(ifn)
index = 0
while (index < ilen) do
ivalue = table:i(index, ifn)
Sformat = (frac(ivalue) == 0) ? "%d" : "%f"
Sformatted strcat Sformatted, sprintf(Sformat, ivalue)
if (index != ilen - 1) then
Sformatted strcat Sformatted, ","
endif
index += 1
od
Sout = json_appendobject(Sjson, Skey, sprintf("[%s]", Sformatted))
xout Sout
endop
/*
Obtain an object, array or value from a json object given a string key
itype, Stringvalue, inumericvalue json_parse Sjson, Skey
itype type of returned value: 0=string, 1=object, 2=array, 3=numeric (1 and 2 are returned as strings for further parsing)
Stringvalue the requested value as a string
inumericvalue the numeric value if itype is 3 , otherwise -1
Sjson the json to parse
Skey the key to lookup
*/
opcode json_parse, iSi, SS
Sjson, Skey xin
itype = -1
index = 0
idepth = 0
idepthrequest = -1
iobjectstart = -1
inval = 0
instring = 0
inrequested = 0
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, "[") == 0 && instring == 0) then
idepth += 1
if (inrequested == 1 && iobjectstart == -1) then
iobjectstart = index
endif
elseif (strcmp(Schar, "]") == 0 && instring == 0) then
idepth -= 1
if (idepthrequest == idepth) then
itype = 2
goto complete
endif
elseif (strcmp(Schar, "{") == 0 && instring == 0) then
idepth += 1
if (inrequested == 1 && iobjectstart == -1) then
iobjectstart = index
endif
elseif (strcmp(Schar, "}") == 0 && instring == 0) then
idepth -= 1
if (idepthrequest == idepth) then
itype = 1
goto complete
endif
elseif (strcmp(Schar, ":") == 0 && instring == 0) then
inval = 1
iobjectstart = index + 1
elseif (strcmp(Schar, ",") == 0 && instring == 0) then
if (inval == 1) then
inval = 0
if (inrequested == 1 && idepthrequest == idepth) then
index -= 1
itype = 3
goto complete
endif
endif
elseif (strcmp(Schar, "\"") == 0) then
instring = 1 - instring
if (instring == 1) then
istringstart = index + 1
else
String = strsub(Sjson, istringstart, index)
if (inrequested == 1 && idepthrequest == idepth) then
iobjectstart = istringstart
index -= 1
itype = 0
goto complete
elseif (strcmp(String, Skey) == 0) then
idepthrequest = idepth
inrequested = 1
endif
endif
endif
index += 1
od
complete:
Stringvalue = strsub(Sjson, iobjectstart, index+1) ; +1 required?
if (itype == 3) then
ivalid, inumericvalue try_strtod strstrip(Stringvalue)
itype = (ivalid == 1) ? 3 : 0
endif
xout itype, Stringvalue, inumericvalue
endop
; itype: 0=S, 1=i
opcode _json_getarray, S[]i[], Si
Sjson, itype xin
index = 0
instring = 0
iobjectstart = -1
iobjectcount = 0
iwriteindex = 0
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, ",") == 0 && instring == 0) then
iobjectcount += 1
elseif (strcmp(Schar, "\"") == 0) then
instring = 1 - instring
endif
index += 1
od
if (itype == 0) then
Soutput[] init iobjectcount + 1
ioutput[] init 1
else
Soutput[] init 1
ioutput[] init iobjectcount + 1
endif
index = 0
instring = 0
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, ",") == 0 && instring == 0) then
if (itype == 1) then
ioutput[iwriteindex] = strtod(strsub(Sjson, iobjectstart, index))
iobjectstart = index + 1
endif
iwriteindex += 1
elseif (strcmp(Schar, "[") == 0 && instring == 0) then
iobjectstart = index + 1
elseif (strcmp(Schar, "]") == 0 && instring == 0) then
if (itype == 1) then
ioutput[iwriteindex] = strtod(strsub(Sjson, iobjectstart, index))
endif
elseif (strcmp(Schar, "\"") == 0) then
if (instring == 0) then
iobjectstart = index + 1
elseif (itype == 0) then
Svalue = strsub(Sjson, iobjectstart, index)
Soutput[iwriteindex] = Svalue
endif
instring = 1 - instring
endif
index += 1
od
xout Soutput, ioutput
endop
opcode json_getstringarray, S[], S
Sjson xin
Soutput[], i_[] _json_getarray Sjson, 0
xout Soutput
endop
opcode json_getnumericarray, i[], S
Sjson xin
S_[], ioutput[] _json_getarray Sjson, 1
xout ioutput
endop
/*
Obtain an object, array or value from a json array given an index
itype, Stringvalue, inumericvalue json_parsearray Sjson, irequestindex
itype type of returned value: 0=string, 1=object, 2=array, 3=numeric (1 and 2 are returned as strings for further parsing)
Stringvalue the requested value as a string
inumericvalue the numeric value if itype is 3 , otherwise -1
Sjson the json to parse
irequestindex index in the array to obtain
*/
opcode json_parsearray, iSi, Si
Sjson, irequestindex xin
itype = -1
inmainarray = 0
index = 0
iobjectstart = 0
iscanindex = 0
instring = 0
idepth = 0
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, "[") == 0 && instring == 0) then
if (inmainarray == 0) then
inmainarray = 1
iobjectstart = index + 1
else
idepth += 1
endif
elseif (strcmp(Schar, "]") == 0 && instring == 0) then
if (inmainarray == 1 && idepth == 0) then
itype = 0
goto complete
else
idepth -= 1
itype = 2
endif
elseif (strcmp(Schar, "{") == 0 && inmainarray == 1 && instring == 0) then
idepth += 1
elseif (strcmp(Schar, "}") == 0 && inmainarray == 1 && instring == 0) then
idepth -= 1
itype = 1
elseif (strcmp(Schar, ",") == 0 && idepth == 0 && inmainarray == 1 && instring == 0) then
if (iscanindex == irequestindex) then
itype = 0
goto complete
endif
iobjectstart = index + 1
iscanindex += 1
elseif (strcmp(Schar, "\"") == 0 && idepth == 0 && inmainarray == 1 && iscanindex == irequestindex) then
instring = 1 - instring
if (instring == 1) then
iobjectstart = index + 1
else
itype = 0
goto complete
endif
endif
index += 1
od
complete:
Stringvalue = strsub(Sjson, iobjectstart, index)
if (itype == 0) then
ivalid, inumericvalue try_strtod strstrip(Stringvalue)
itype = (ivalid == 1) ? 3 : 0
endif
xout itype, Stringvalue, inumericvalue
endop
/*
Get the length of a json array
ilength json_arraylength Sjson
ilength length determined
Sjson input array
*/
opcode json_arraylength, i, S
Sjson xin
idepth = -1
idepthmax = -1
ihasitems = 0
instring = 0
index = 0
itemnum = 0
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, "[") == 0 && instring == 0) then
idepth += 1
idepthmax += 1
elseif (strcmp(Schar, "]") == 0 && instring == 0) then
idepth -= 1
if (idepth < 0) then
goto complete
endif
elseif (strcmp(Schar, "{") == 0 && instring == 0 && idepth >= 0) then
idepth += 1
idepthmax += 1
elseif (strcmp(Schar, "}") == 0 && instring == 0 && idepth >= 0) then
idepth -= 1
elseif (strcmp(Schar, ",") == 0 && instring == 0 && idepth == 0) then
itemnum += 1
elseif (strcmp(Schar, "\"") == 0) then
if (idepth == 0) then
ihasitems = 1
endif
instring = 1 - instring
endif
index += 1
od
complete:
if (idepthmax != 0 || ihasitems == 1) then
itemnum += 1
endif
xout itemnum
endop
/*
Get the keys from an object
Skeys[] json_getkeys Sjson
Skeys[] the keys found
Sjson input json
*/
opcode json_getkeys, S[], S
Sjson xin
Stemp[] init 999
itempindex init 0
idepth = -1
instring = 0
index = 0
inmainobject = 0
iskey = 1
while (index < strlen(Sjson)) do
Schar = strsub(Sjson, index, index + 1)
if (strcmp(Schar, "[") == 0 && instring == 0 && idepth >= 0) then
idepth += 1
elseif (strcmp(Schar, "]") == 0 && instring == 0 && idepth >= 0) then
idepth -= 1
elseif (strcmp(Schar, "{") == 0 && instring == 0) then
idepth += 1
elseif (strcmp(Schar, "}") == 0 && instring == 0) then
idepth -= 1
if (idepth < 0) then
goto complete
endif
elseif (strcmp(Schar, ":") == 0 && instring == 0 && idepth == 0) then
iskey = 0
elseif (strcmp(Schar, ",") == 0 && instring == 0 && idepth == 0) then
iskey = 1
elseif (strcmp(Schar, "\"") == 0 && idepth == 0) then
instring = 1 - instring
if (instring == 1) then
istringstart = index + 1
elseif (iskey == 1) then
Stemp[itempindex] = strsub(Sjson, istringstart, index)
itempindex += 1
endif
endif
index += 1
od
complete:
Skeys[] init itempindex ;+ 1
index = 0
while (index < itempindex) do
Skeys[index] = Stemp[index]
index += 1
od
xout Skeys
endop
#end
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