Move String8 path functions to androidfw and aapt

Test: m checkbuild
Bug: 295394788
Change-Id: I9488bc5632cbd47c83f6b5f2df4c87eb324a1e8e

1 files changed, 23 insertions, 0 deletions

diff --git a/tools/aapt/Utils.cpp b/tools/aapt/Utils.cpp
index 36b018e7dd2c..946916a0598a 100644
--- a/tools/aapt/Utils.cpp
+++ b/tools/aapt/Utils.cpp
@@ -36,3 +36,26 @@ void convertToResPath([[maybe_unused]] String8& s) {
     }
 #endif
 }
+
+String8 walkPath(const String8& path, String8* outRemains) {
+    const char* cp;
+    const char* const str = path.c_str();
+    const char* buf = str;
+
+    cp = strchr(buf, OS_PATH_SEPARATOR);
+    if (cp == buf) {
+        // don't include a leading '/'.
+        buf = buf + 1;
+        cp = strchr(buf, OS_PATH_SEPARATOR);
+    }
+
+    if (cp == nullptr) {
+        String8 res = buf != str ? String8(buf) : path;
+        if (outRemains) *outRemains = String8();
+        return res;
+    }
+
+    String8 res(buf, cp - buf);
+    if (outRemains) *outRemains = String8(cp + 1);
+    return res;
+}