init commit

purego_darwin.go

@@ -0,0 +1,33 @@
+//go:build (!cgo || nocgo) && darwin
+
+package fitz
+
+import (
+	"fmt"
+
+	"github.com/ebitengine/purego"
+)
+
+const (
+	libname = "libmupdf.dylib"
+)
+
+// loadLibrary loads the so and panics on error.
+func loadLibrary() uintptr {
+	handle, err := purego.Dlopen(libname, purego.RTLD_NOW|purego.RTLD_GLOBAL)
+	if err != nil {
+		panic(fmt.Errorf("cannot load library: %w", err))
+	}
+
+	return handle
+}
+
+// procAddress returns the address of symbol name.
+func procAddress(handle uintptr, procName string) uintptr {
+	addr, err := purego.Dlsym(handle, procName)
+	if err != nil {
+		panic(fmt.Errorf("cannot get proc address for %s: %w", procName, err))
+	}
+
+	return addr
+}