BLI_path: only operate on native path slashes for BLI_path_join

Previously both slashes were considered when joining paths, meaning
slashes that were part of the path name could be stripped before joining
the path.

Prefer using the native path separator for low level path functions,
callers can always convert slashes into the expected direction if they
need. This also matches BLI_path_append behavior.

1 files changed, 6 insertions, 5 deletions

diff --git a/source/blender/blenlib/intern/path_util.c b/source/blender/blenlib/intern/path_util.c
index bb87a26dada..4e3d9be6186 100644
--- a/source/blender/blenlib/intern/path_util.c
+++ b/source/blender/blenlib/intern/path_util.c
@@ -1487,9 +1487,10 @@ size_t BLI_path_join_array(char *__restrict dst,
   bool has_trailing_slash = false;
   if (ofs != 0) {
     size_t len = ofs;
-    while ((len != 0) && ELEM(path[len - 1], SEP, ALTSEP)) {
+    while ((len != 0) && (path[len - 1] == SEP)) {
       len -= 1;
     }
+
     if (len != 0) {
       ofs = len;
     }
@@ -1500,18 +1501,18 @@ size_t BLI_path_join_array(char *__restrict dst,
     path = path_array[path_index];
     has_trailing_slash = false;
     const char *path_init = path;
-    while (ELEM(path[0], SEP, ALTSEP)) {
+    while (path[0] == SEP) {
       path++;
     }
     size_t len = strlen(path);
     if (len != 0) {
-      while ((len != 0) && ELEM(path[len - 1], SEP, ALTSEP)) {
+      while ((len != 0) && (path[len - 1] == SEP)) {
         len -= 1;
       }
 
       if (len != 0) {
         /* the very first path may have a slash at the end */
-        if (ofs && !ELEM(dst[ofs - 1], SEP, ALTSEP)) {
+        if (ofs && (dst[ofs - 1] != SEP)) {
           dst[ofs++] = SEP;
           if (ofs == dst_last) {
             break;
@@ -1534,7 +1535,7 @@ size_t BLI_path_join_array(char *__restrict dst,
   }
 
   if (has_trailing_slash) {
-    if ((ofs != dst_last) && (ofs != 0) && (ELEM(dst[ofs - 1], SEP, ALTSEP) == 0)) {
+    if ((ofs != dst_last) && (ofs != 0) && (dst[ofs - 1] != SEP)) {
       dst[ofs++] = SEP;
     }
   }