From 7b84046d79e48f801deba929f20170479acbc0e8 Mon Sep 17 00:00:00 2001
From: Gavin Hayes <gavin@dylibso.com>
Date: Fri, 22 Dec 2023 13:47:36 -0500
Subject: [PATCH] fix: add input_offset

---
 extism_test.go         |  15 +++++++++++++++
 host.go                |   1 +
 wasm/input_offset.wasm | Bin 0 -> 318 bytes
 3 files changed, 16 insertions(+)
 create mode 100644 wasm/input_offset.wasm

diff --git a/extism_test.go b/extism_test.go
index 6c0e8ba..bb4ee75 100644
--- a/extism_test.go
+++ b/extism_test.go
@@ -701,6 +701,21 @@ func TestJsonManifest(t *testing.T) {
 	}
 }
 
+func TestInputOffset(t *testing.T) {
+	manifest := manifest("input_offset.wasm")
+
+	if plugin, ok := plugin(t, manifest); ok {
+		defer plugin.Close()
+
+		input_data := []byte("hello world")
+		exit, output, err := plugin.Call("input_offset_length", input_data)
+
+		if assertCall(t, err, exit) {
+			assert.Equal(t, len(input_data), int(output[0]))
+		}
+	}
+}
+
 func BenchmarkInitialize(b *testing.B) {
 	ctx := context.Background()
 	cache := wazero.NewCompilationCache()
diff --git a/host.go b/host.go
index 31cd6cd..c99c739 100644
--- a/host.go
+++ b/host.go
@@ -256,6 +256,7 @@ func buildEnvModule(ctx context.Context, rt wazero.Runtime, extism api.Module) (
 	wrap("input_set", []ValueType{ValueTypeI64, ValueTypeI64}, []ValueType{})
 	wrap("output_set", []ValueType{ValueTypeI64, ValueTypeI64}, []ValueType{})
 	wrap("input_length", []ValueType{}, []ValueType{ValueTypeI64})
+	wrap("input_offset", []ValueType{}, []ValueType{ValueTypeI64})
 	wrap("output_length", []ValueType{}, []ValueType{ValueTypeI64})
 	wrap("output_offset", []ValueType{}, []ValueType{ValueTypeI64})
 	wrap("length", []ValueType{ValueTypeI64}, []ValueType{ValueTypeI64})
diff --git a/wasm/input_offset.wasm b/wasm/input_offset.wasm
new file mode 100644
index 0000000000000000000000000000000000000000..163adce509d225ba6de9e1d80ba0563d0a256e66
GIT binary patch
literal 318
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zs|f%Nf(^)T$k&6tN4?$nPO`5q?r8PmV62;{;@mqHr^=;fx3kIt%{a_ev3CbhGw4`n
zN|jdgDY%)*EYHpM|0Xh(dzL+$STG4GYHKUuP%CZ9D`W7jN#ETv8qtu*uiCK~BSDOq
kVop%+!4h4pgCf(4W)eTo(A&-*s(8tQF9>%@62h140m`vjSO5S3

literal 0
HcmV?d00001