* Added parser demo

* Removed debug statements from parser code


git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@8556 3ad0048d-3df7-0310-abae-a5850022a9f2

3 files changed, 169 insertions, 2 deletions

diff --git a/packages/fcl-json/demo/parsedemo.lpi b/packages/fcl-json/demo/parsedemo.lpi
new file mode 100644
index 0000000000..f341e42371
--- /dev/null
+++ b/packages/fcl-json/demo/parsedemo.lpi
@@ -0,0 +1,46 @@
+<?xml version="1.0"?>
+<CONFIG>
+  <ProjectOptions>
+    <PathDelim Value="/"/>
+    <Version Value="5"/>
+    <General>
+      <SessionStorage Value="InProjectDir"/>
+      <MainUnit Value="0"/>
+      <TargetFileExt Value=""/>
+    </General>
+    <VersionInfo>
+      <ProjectVersion Value=""/>
+    </VersionInfo>
+    <PublishOptions>
+      <Version Value="2"/>
+      <IgnoreBinaries Value="False"/>
+      <IncludeFileFilter Value="*.(pas|pp|inc|lfm|lpr|lrs|lpi|lpk|sh|xml)"/>
+      <ExcludeFileFilter Value="*.(bak|ppu|ppw|o|so);*~;backup"/>
+    </PublishOptions>
+    <RunParams>
+      <local>
+        <FormatVersion Value="1"/>
+        <LaunchingApplication PathPlusParams="/usr/X11R6/bin/xterm -T 'Lazarus Run Output' -e $(LazarusDir)/tools/runwait.sh $(TargetCmdLine)"/>
+      </local>
+    </RunParams>
+    <Units Count="1">
+      <Unit0>
+        <Filename Value="parsedemo.pp"/>
+        <IsPartOfProject Value="True"/>
+        <UnitName Value="parsedemo"/>
+      </Unit0>
+    </Units>
+  </ProjectOptions>
+  <CompilerOptions>
+    <Version Value="5"/>
+    <SearchPaths>
+      <OtherUnitFiles Value="../src/"/>
+    </SearchPaths>
+    <CodeGeneration>
+      <Generate Value="Faster"/>
+    </CodeGeneration>
+    <Other>
+      <CompilerPath Value="$(CompPath)"/>
+    </Other>
+  </CompilerOptions>
+</CONFIG>
diff --git a/packages/fcl-json/demo/parsedemo.pp b/packages/fcl-json/demo/parsedemo.pp
new file mode 100644
index 0000000000..19e389f40e
--- /dev/null
+++ b/packages/fcl-json/demo/parsedemo.pp
@@ -0,0 +1,123 @@
+program parsedemo;
+
+{$mode objfpc}{$H+}
+
+uses
+  Classes, SysUtils, fpjson,jsonparser;
+
+Procedure DoParse(P : TJSONParser);
+
+Var
+  J : TJSONData;
+  
+begin
+  Try
+    J:=P.Parse;
+    Try
+      Writeln('Parse succesful. Dumping JSON data : ');
+      If Assigned(J) then
+        begin
+        Writeln('Returned JSON structure has class : ',J.ClassName);
+        Writeln(J.AsJSON)
+        end
+      else
+        Writeln('No JSON data available');
+    Finally
+      FreeAndNil(J);
+    end;
+  except
+    On E : Exception do
+      Writeln('An Exception occurred when parsing : ',E.Message);
+  end;
+end;
+
+
+Procedure ParseFile (FileName : String);
+
+Var
+  F : TFileStream;
+  P : TJSONParser;
+
+begin
+  F:=TFileStream.Create(FileName,fmopenRead);
+  try
+    // Create parser with Stream as source.
+    P:=TJSONParser.Create(F);
+    try
+      DoParse(P);
+    finally
+      FreeAndNil(P);
+    end;
+  finally
+    F.Destroy;
+  end;
+end;
+
+Procedure ParseString(S : String);
+
+Var
+  P : TJSONParser;
+begin
+  // Create parser with Stream as source.
+  P:=TJSONParser.Create(S);
+  try
+    DoParse(P);
+  finally
+    FreeAndNil(P);
+  end;
+end;
+
+Procedure DefaultParsing;
+
+Const
+  // From JSON website
+ SAddr ='{ "addressbook": { "name": "Mary Lebow", '+
+         '  "address": {'+
+         '      "street": "5 Main Street",'+LineEnding+
+         '        "city": "San Diego, CA",'+LineEnding+
+         '        "zip": 91912,'+LineEnding+
+         '    },'+LineEnding+
+         '    "phoneNumbers": [  '+LineEnding+
+         '        "619 332-3452",'+LineEnding+
+         '        "664 223-4667"'+LineEnding+
+         '    ]'+LineEnding+
+         ' }'+LineEnding+
+         '}';
+
+
+begin
+  ParseString('');
+  ParseString('NULL');
+  ParseString('1');
+  ParseString('2.3');
+  ParseString('True');
+  ParseString('False');
+  ParseString('"A string"');
+  ParseString('[ Null, False, 1 , 2.3,  "a" , { "b" : 1 }]');
+  ParseString('{ "a" : 1, "b" : "Something" }');
+  ParseString(SAddr);
+end;
+
+Procedure Usage;
+
+begin
+  Writeln('Usage : parsedemo arg1 [arg2 [arg3 ...[argN]]]');
+  Writeln('  ArgN can be the name of an existing file, or a JSON string');
+end;
+
+Var
+  I : Integer;
+  
+begin
+  If (ParamCount=0) then
+    DefaultParsing
+  else if (ParamCount=1) and ((Paramstr(1)='-h') or (ParamStr(1)='--help')) then
+    Usage
+  else
+    For I:=1 to ParamCount do
+      If FileExists(Paramstr(i)) then
+        ParseFile(ParamStr(I))
+      else
+        ParseString(Paramstr(I));
+end.
+
diff --git a/packages/fcl-json/src/jsonparser.pp b/packages/fcl-json/src/jsonparser.pp
index 58564e72bb..dcf00df23c 100644
--- a/packages/fcl-json/src/jsonparser.pp
+++ b/packages/fcl-json/src/jsonparser.pp
@@ -164,7 +164,6 @@ begin
       T:=GetNextToken;
       If (T<>tkColon) then
         DoError(SErrExpectedColon);
-      Writeln('Getting element');
       E:=DoParse(False,False);
       Result.Add(N,E);
       T:=GetNextToken;
@@ -221,7 +220,6 @@ begin
   Repeat
     Result:=FScanner.FetchToken;
   Until (Result<>tkWhiteSpace);
-  Writeln('GetNextToken : ',CurrentTokenString);
 end;
 
 Procedure TJSONParser.DoError(Msg : String);