Added a YAML benchmark that loads and optionally extracts data

from and/or dumps a YAML file.

cdc.d

@@ -143,16 +143,13 @@ void main(string[] args)
     args = args[1 .. $];
     foreach(arg; args)
     {
-        if(arg[0] == '-')
+        if(arg[0] == '-') switch(arg)
         {
-            switch(arg)
-            {
-                case "--help", "-h": help(); return;
-                case "--dmd": compiler = "dmd"; break;
-                case "--gdc": compiler = "gdmd"; break;
-                case "--ldc": compiler = "ldmd"; break;
-                default: extra_args ~= arg;
-            }
+            case "--help", "-h": help(); return;
+            case "--dmd": compiler = "dmd"; break;
+            case "--gdc": compiler = "gdmd"; break;
+            case "--ldc": compiler = "ldmd"; break;
+            default: extra_args ~= arg;
         }
     }
     if(args.length > 0 && args[$ - 1][0] != '-'){target = args[$ - 1];}

examples/yaml_bench/Makefile

@@ -0,0 +1,5 @@
+main:
+	dmd -w -I../../ -L-L../../ -L-ldyaml yaml_bench.d
+
+clean:
+	rm yaml_stats yaml_bench.o

examples/yaml_bench/yaml_bench.d

@@ -0,0 +1,106 @@
+
+//Benchmark that loads, and optionally extracts data from and/or emits a YAML file. 
+
+import std.datetime;
+import std.stdio;
+import yaml;
+
+///Print help information.
+void help()
+{
+    string help =
+        "D:YAML benchmark\n"
+        "Copyright (C) 2011 Ferdinand Majerech\n"
+        "Usage: yaml_bench [OPTION ...] [YAML_FILE]\n"
+        "\n"
+        "Loads and optionally extracts data and/or dumps a YAML file.\n"
+        "\n"
+        "Available options:\n"
+        " -h --help          Show this help information.\n"
+        " -g --get           Extract data from the file (using Node.get()).\n"
+        " -d --dump          Dump the loaded data (to YAML_FILE.dump).\n";
+    writeln(help);
+}
+
+///Get data out of every node.
+void extract(ref Node document)
+{
+    void crawl(ref Node root)
+    {
+        if(root.isScalar) switch(root.tag)
+        {
+            case "tag:yaml.org,2002:null":      auto value = root.get!YAMLNull;  break;
+            case "tag:yaml.org,2002:bool":      auto value = root.get!bool;      break;
+            case "tag:yaml.org,2002:int":       auto value = root.get!long;      break;
+            case "tag:yaml.org,2002:float":     auto value = root.get!real;      break;
+            case "tag:yaml.org,2002:binary":    auto value = root.get!(ubyte[]); break;
+            case "tag:yaml.org,2002:timestamp": auto value = root.get!SysTime;   break;
+            case "tag:yaml.org,2002:str":       auto value = root.get!string;    break;
+            default: writeln("Unrecognozed tag: ", root.tag);
+        }
+        else if(root.isSequence) foreach(ref Node node; root)
+        {
+            crawl(node);
+        }
+        else if(root.isMapping) foreach(ref Node key, ref Node value; root)
+        {
+            crawl(key);
+            crawl(value);
+        }
+    }
+
+    crawl(document);
+}
+
+void main(string[] args)
+{
+    bool get = false;
+    bool dump = false;
+    string file = null;
+
+    //Parse command line args
+    foreach(arg; args[1 .. $]) 
+    {
+        if(arg[0] == '-') switch(arg) 
+        {
+            case "--help", "-h": help(); return;
+            case "--get",  "-g": get = true; break;
+            case "--dump", "-d": dump = true; break;
+            default: writeln("\nUnknown argument: ", arg, "\n\n"); help(); return;
+        }
+        else
+        {
+            if(file !is null)
+            {
+                writeln("\nUnknown argument or file specified twice: ", arg, "\n\n"); 
+                help(); 
+                return;
+            }
+
+            file = arg;
+        }
+    }
+    if(file is null)
+    {
+        writeln("\nFile not specified.\n\n"); 
+        help(); 
+        return;
+    }
+
+    try
+    {
+        auto nodes = Loader(file).loadAll();
+        if(dump)
+        {
+            Dumper(file ~ ".dump").dump(nodes);
+        }
+        if(get) foreach(ref node; nodes)
+        {
+            extract(node);
+        }
+    }
+    catch(YAMLException e)
+    {
+        writeln("ERROR: ", e.msg);
+    }
+}

examples/yaml_gen/config.yaml

@@ -6,6 +6,9 @@ encoding:               utf-32
 indent:                 4
 text-width:             40
 
+#Note: setting collection probabilities too high can lead to stack overflow as 
+#we end up with extremely deeply nested structures
+
 string: 
     probability: 10 
     range: {min: 1, max: 40, dist: cubic}

examples/yaml_gen/yaml_gen.d

@@ -1,4 +1,6 @@
 
+///Random YAML generator. Used to generate benchmarking inputs.
+
 import std.conv;
 import std.datetime;
 import std.math;
@@ -8,7 +10,7 @@ import std.string;
 import yaml;
 
 
-immutable alphabet = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
+immutable alphabet = " abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ-_";
 immutable digits   = "0123456789";
 
 Node config;