From c992230e545e9f18f15cf76d7a9c8ac08be0e7dd Mon Sep 17 00:00:00 2001
From: Neale Pickett <neale@lanl.gov>
Date: Wed, 6 Aug 2014 18:01:26 -0600
Subject: [PATCH] Start at Gapstr

---
 Makefile              |  3 +++
 src/Makefile          |  3 +++
 src/fred/gaptest.go   | 14 ++++++++++++++
 src/netarch/gapstr.go | 40 ++++++++++++++++++++++++++++++++++++++++
 4 files changed, 60 insertions(+)
 create mode 100644 src/Makefile
 create mode 100644 src/fred/gaptest.go
 create mode 100644 src/netarch/gapstr.go

diff --git a/Makefile b/Makefile
index 5474dc2..e4e4162 100644
--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,9 @@ export GOPATH
 
 all: $(TARGETS)
 
+%: src/%.go
+	go build $@
+
 %: %.go
 	go build $<
 	
diff --git a/src/Makefile b/src/Makefile
new file mode 100644
index 0000000..be33ee9
--- /dev/null
+++ b/src/Makefile
@@ -0,0 +1,3 @@
+all:
+%:
+	$(MAKE) -C .. $@
diff --git a/src/fred/gaptest.go b/src/fred/gaptest.go
new file mode 100644
index 0000000..7797da6
--- /dev/null
+++ b/src/fred/gaptest.go
@@ -0,0 +1,14 @@
+package main
+
+import (
+	"fmt"
+	"netarch"
+)
+
+func main() {
+	g := new(netarch.Gapstr)
+	g = g.AppendString("hello")
+	g = g.AppendGap(12)
+	g = g.AppendString("world")
+	fmt.Println("hi", g.String())
+}
diff --git a/src/netarch/gapstr.go b/src/netarch/gapstr.go
new file mode 100644
index 0000000..9ecc54e
--- /dev/null
+++ b/src/netarch/gapstr.go
@@ -0,0 +1,40 @@
+package netarch
+
+import (
+	"bytes"
+)
+
+type chunk interface{}
+
+type Gapstr struct {
+	chunks []chunk
+}
+
+func GapstrOfString(s string) *Gapstr {
+	return &Gapstr{[]chunk{s}}
+}
+
+func (g *Gapstr) appendChunk(c chunk) *Gapstr {
+	return &Gapstr{append(g.chunks, c)}
+}
+
+func (g *Gapstr) AppendString(s string) *Gapstr {
+	return g.appendChunk(s)
+}
+
+func (g *Gapstr) AppendGap(len int) *Gapstr {
+	return g.appendChunk(len)
+}
+
+func (g *Gapstr) String() string {
+	var b bytes.Buffer
+	for _, c := range g.chunks {
+		switch c.(type) {
+		case int:
+			b.Write(bytes.Repeat([]byte{0}, c.(int)))
+		case string:
+			b.WriteString(c.(string))
+		}
+	}
+	return b.String()
+}
\ No newline at end of file