Add helper function for passing Go string slices to C; document some functions that won't be ported

0.go

@@ -27,6 +27,21 @@ func getPascalStringFromBytes(goBytes []byte) C.PascalString {
 	}
 }
 
+// getCPascalStringArrayFromStringSlice converts a Go slice
+// of strings to a C array of pascal strings.
+func getCPascalStringArrayFromStringSlice(goSlice []string) *C.PascalString {
+	// allocate C array for PascalStrings
+	cArrPtr := (*C.PascalString)(C.malloc(C.size_t(len(goSlice)) * C.size_t(C.sizeof_PascalString)))
+
+	// populate the array with the decrypted lines
+	cArr := (*[1 << 30]C.PascalString)(unsafe.Pointer(cArrPtr))[:len(goSlice):len(goSlice)]
+	for i := range goSlice {
+		cArr[i] = getPascalString(goSlice[i])
+	}
+
+	return cArrPtr
+}
+
 // GetPascalStringFromCString is a helper meant to be used from C.
 //
 //export GetPascalStringFromCString

README.md

@@ -111,11 +111,11 @@ int main() {
     - [ ] ShearRemote(vanityPath string, onlyShearAgeFile bool) error
     - [ ] RunJob() (*syncListsT, error)
 - [ ] synccommon
-    - [ ] AddFolderLocal(vanityPath string) error
-    - [ ] RenameLocal(oldVanityPath, newVanityPath string) error
-    - [ ] ShearAgeFileLocal(vanityPath string) error
-    - [ ] ShearLocal(vanityPath, clientDeviceID string, onlyShearAgeFile bool) (string, bool, error)
+    - [X] ~~AddFolderLocal(vanityPath string) error~~ (not for use outside of libmutton)
+    - [X] ~~RenameLocal(oldVanityPath, newVanityPath string) error~~ (not for use outside of libmutton)
+    - [X] ~~ShearAgeFileLocal(vanityPath string) error~~ (not for use outside of libmutton)
+    - [X] ~~ShearLocal(vanityPath, clientDeviceID string, onlyShearAgeFile bool) (string, bool, error)~~ (not for use outside of libmutton)
     - [ ] WalkEntryDir() ([]string, []string, error)
-    - [ ] GetAllEntryData() (EntryMapT, error)
+    - [X] ~~GetAllEntryData() (EntryMapT, error)~~ (not easy to port to C; also not needed)
 - [ ] syncserver
     - [ ] GetRemoteDataFromServer(clientDeviceID string)

crypt.go

@@ -4,8 +4,6 @@ package main
 // #include "types.h"
 import "C"
 import (
-	"unsafe"
-
 	"github.com/rwinkhart/libmutton/crypt"
 	"github.com/rwinkhart/rcw/wrappers"
 )
@@ -28,16 +26,7 @@ func DecryptFileToSlice(realPath, rcwPassword C.PascalString) (*C.char, *C.Pasca
 		return nil, nil, 0
 	}
 
-	// allocate C array for PascalStrings
-	cLinesPtr := (*C.PascalString)(C.malloc(C.size_t(len(lines)) * C.size_t(C.sizeof_PascalString)))
-
-	// populate the array with the decrypted lines
-	cLinesSlice := (*[1 << 30]C.PascalString)(unsafe.Pointer(cLinesPtr))[:len(lines):len(lines)]
-	for i, line := range lines {
-		cLinesSlice[i] = getPascalString(line)
-	}
-
-	return nil, cLinesPtr, C.int(len(lines))
+	return nil, getCPascalStringArrayFromStringSlice(lines), C.int(len(lines))
 }
 
 // EncryptBytes returns: