[PATCH 03/41] robocopy: add source / destination / file argument parser

[Florian Eder]

Parses (relative / absolute) path arguments as source, destination
and files to include

Signed-off-by: Florian Eder 
---
Splitted from the next patch to enhance readabilty a bit :-)
---
 programs/robocopy/Makefile.in |  2 +-
 programs/robocopy/main.c      | 80 +++++++++++++++++++++++++++++++++++
 programs/robocopy/robocopy.h  | 14 +++++-
 3 files changed, 94 insertions(+), 2 deletions(-)

diff --git a/programs/robocopy/Makefile.in b/programs/robocopy/Makefile.in
index 5463edcb8b3..3f16d00c0a8 100644
--- a/programs/robocopy/Makefile.in
+++ b/programs/robocopy/Makefile.in
@@ -1,5 +1,5 @@
 MODULE    = robocopy.exe
-IMPORTS   =
+IMPORTS   = kernelbase

EXTRADLLFLAGS = -mconsole -municode -mno-cygwin

diff --git a/programs/robocopy/main.c b/programs/robocopy/main.c
index a184235e488..8f8974b3528 100644
--- a/programs/robocopy/main.c
+++ b/programs/robocopy/main.c
@@ -21,9 +21,89 @@ WINE_DEFAULT_DEBUG_CHANNEL(robocopy);

#define WIN32_LEAN_AND_MEAN
 #include <windows.h>
+#include <stdlib.h>
+#include <pathcch.h>
+#include "robocopy.h"
+
+struct robocopy_options options;
+
+static BOOL is_valid_robocopy_flag(WCHAR *string)
+{
+    /*
+     * Robocopy switches contain one (and only one) backslash at the start
+     * /xf => valid flag
+     * /r:1 => valid flag
+     * /r:1aö => valid flag
+     * /r:1aö/ => not a valid flag, is interpreted as a filename
+     */
+    if (string[0] != L'/') return FALSE;
+    if (wcschr(string + 1, L'/') != NULL) return FALSE;
+    return TRUE;
+}
+
+WCHAR *get_absolute_path_with_trailing_backslash(WCHAR *path)
+{
+    DWORD size;
+    WCHAR *absolute_path;
+
+    /* allocate absolute path + potential backslash + null WCHAR */
+    size = GetFullPathNameW(path, 0, NULL, NULL) + 2;
+    if (!wcsnicmp(path, L"\\?\", 4))
+    {
+        /* already prefixed with \?\ */
+        absolute_path = calloc(size, sizeof(WCHAR));
+        GetFullPathNameW(path, size, absolute_path, NULL);
+        PathCchAddBackslashEx(absolute_path, size, NULL, NULL);
+    }
+    else
+    {
+        absolute_path = calloc(size + 4, sizeof(WCHAR));
+        wcscpy(absolute_path, L"\\?\");
+        GetFullPathNameW(path, size, &(absolute_path[4]), NULL);
+        PathCchAddBackslashEx(absolute_path, size + 4, NULL, NULL);
+    }
+    return absolute_path;
+}
+
+static void parse_arguments(int argc, WCHAR *argv[])
+{
+    int i;
+
+    memset(&options, 0, sizeof(options));
+    options.files = calloc(1, offsetof(struct path_array, array) + (argc * sizeof(WCHAR*)));
+
+    for (i = 1; i < argc; i++)
+    {
+        if (is_valid_robocopy_flag(argv[i]))
+            WINE_FIXME("encountered an unknown robocopy flag: %S\n", argv[i]);
+        else
+        {
+            /*
+            *(Probably) not a flag, we can parse it as the source / the destination / a filename
+            * Priority: Source > Destination > (more than one) File
+            */
+            if (!options.source)
+            {
+                options.source = get_absolute_path_with_trailing_backslash(argv[i]);
+            }
+            else if (!options.destination)
+            {
+                options.destination = get_absolute_path_with_trailing_backslash(argv[i]);
+            }
+            else
+            {
+                options.files->array[options.files->size] = calloc(wcslen(argv[i]) + 1, sizeof(WCHAR));
+                wcscpy(options.files->array[options.files->size], argv[i]);
+                options.files->size++;
+            }
+        }
+    }
+}

int __cdecl wmain(int argc, WCHAR *argv[])
 {
+    parse_arguments(argc, argv);
+
     WINE_FIXME("robocopy stub");
     return 0;
 }
\ No newline at end of file
diff --git a/programs/robocopy/robocopy.h b/programs/robocopy/robocopy.h
index 33e84b82ea0..aa857cd8c35 100644
--- a/programs/robocopy/robocopy.h
+++ b/programs/robocopy/robocopy.h
@@ -16,4 +16,16 @@
  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  */

-#define WIN32_LEAN_AND_MEAN
\ No newline at end of file
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+struct path_array {
+    UINT size;
+    WCHAR *array[1];
+};
+
+struct robocopy_options {
+    WCHAR *destination;
+    WCHAR *source;
+    struct path_array* files;
+};
\ No newline at end of file