fix issues with listing and extracting mpq files

.gitignore

@@ -1 +1 @@
-*.mpq
+asset

formats/mpq/mpq.go

@@ -22,6 +22,7 @@ import (
 	"fmt"
 	"io"
 	"math"
+	"os"
 	"strings"
 	"unsafe"
 )
@@ -124,7 +125,7 @@ func (a *archive) Close() error {
 }
 
 func (a *archive) OpenFile(path string) (File, error) {
-	cs := C.CString(path)
+	cs := C.CString(strings.Replace(path, string(os.PathSeparator), "\\", -1))
 	defer C.free(unsafe.Pointer(cs))
 
 	file := &file{size: math.MaxUint32}
@@ -153,6 +154,7 @@ func (a *archive) GetPaths() ([]string, error) {
 
 	for _, line := range strings.Split(string(buff.Bytes()), "\r\n") {
 		line = strings.TrimSpace(line)
+		line = strings.Replace(line, "\\", string(os.PathSeparator), -1)
 		if len(line) > 0 {
 			a.paths = append(a.paths, line)
 		}

tools/mpq/mpq.go

@@ -86,7 +86,7 @@ func extract(mpqPath, filter, targetDir string) error {
 
 func main() {
 	var (
-		filter    = flag.String("filter", "*.*", "wildcard file filter")
+		filter    = flag.String("filter", "**", "wildcard file filter")
 		targetDir = flag.String("target", ".", "target directory")
 	)
 
@@ -107,14 +107,14 @@ func main() {
 	case "list":
 		for i := 1; i < flag.NArg(); i++ {
 			if err := list(flag.Arg(i), *filter); err != nil {
-				fmt.Fprintln(os.Stderr)
+				fmt.Fprintln(os.Stderr, err)
 				os.Exit(1)
 			}
 		}
 	case "extract":
 		for i := 1; i < flag.NArg(); i++ {
 			if err := extract(flag.Arg(i), *filter, *targetDir); err != nil {
-				fmt.Fprintln(os.Stderr)
+				fmt.Fprintln(os.Stderr, err)
 				os.Exit(1)
 			}
 		}