cmd.exe: Support SHIFT /n option.

programs/cmd/batch.c

@@ -89,7 +89,7 @@ void WCMD_batch (char *file, char *command, int called, char *startLabel, HANDLE
   context = (BATCH_CONTEXT *)LocalAlloc (LMEM_FIXED, sizeof (BATCH_CONTEXT));
   context -> h = h;
   context -> command = command;
-  context -> shift_count = 0;
+  memset(context -> shift_count, 0x00, sizeof(context -> shift_count));
   context -> prev_context = prev_context;
   context -> skip_rest = FALSE;
 
@@ -386,7 +386,7 @@ void WCMD_HandleTildaModifiers(char **start, char *forVariable) {
   /* Extract the parameter to play with */
   if ((*lastModifier >= '0' && *lastModifier <= '9')) {
     strcpy(outputparam, WCMD_parameter (context -> command,
-                 *lastModifier-'0' + context -> shift_count, NULL));
+                 *lastModifier-'0' + context -> shift_count[*lastModifier-'0'], NULL));
   } else {
     /* FIXME: Retrieve 'for' variable %c\n", *lastModifier); */
     /* Need to get 'for' loop variable into outputparam      */

programs/cmd/builtins.c

@@ -1388,11 +1388,32 @@ void WCMD_setshow_time (void) {
  * WCMD_shift
  *
  * Shift batch parameters.
+ * Optional /n says where to start shifting (n=0-8)
  */
 
-void WCMD_shift (void) {
+void WCMD_shift (char *command) {
+  int start;
 
-  if (context != NULL) context -> shift_count++;
+  if (context != NULL) {
+    char *pos = strchr(command, '/');
+    int   i;
+
+    if (pos == NULL) {
+      start = 0;
+    } else if (*(pos+1)>='0' && *(pos+1)<='8') {
+      start = (*(pos+1) - '0');
+    } else {
+      SetLastError(ERROR_INVALID_PARAMETER);
+      WCMD_print_error();
+      return;
+    }
+
+    WINE_TRACE("Shifting variables, starting at %d\n", start);
+    for (i=start;i<=8;i++) {
+      context -> shift_count[i] = context -> shift_count[i+1] + 1;
+    }
+    context -> shift_count[9] = context -> shift_count[9] + 1;
+  }
 
 }
 

programs/cmd/wcmd.h

@@ -68,7 +68,7 @@ void WCMD_setshow_env (char *command);
 void WCMD_setshow_path (char *command);
 void WCMD_setshow_prompt (void);
 void WCMD_setshow_time (void);
-void WCMD_shift (void);
+void WCMD_shift (char *command);
 void WCMD_show_prompt (void);
 void WCMD_title (char *);
 void WCMD_type (void);
@@ -91,7 +91,7 @@ void WCMD_splitpath(const CHAR* path, CHAR* drv, CHAR* dir, CHAR* name, CHAR* ex
 typedef struct {
   char *command;	/* The command which invoked the batch file */
   HANDLE h;             /* Handle to the open batch file */
-  int shift_count;	/* Number of SHIFT commands executed */
+  int shift_count[10];	/* Offset in terms of shifts for %0 - %9 */
   void *prev_context;	/* Pointer to the previous context block */
   BOOL  skip_rest;      /* Skip the rest of the batch program and exit */
 } BATCH_CONTEXT;

programs/cmd/wcmdmain.c

@@ -411,7 +411,7 @@ void WCMD_process_command (char *command)
       /* Replace use of %0...%9 if in batch program*/
       } else if (context && (i >= 0) && (i <= 9)) {
         s = strdup (p+2);
-        t = WCMD_parameter (context -> command, i + context -> shift_count, NULL);
+        t = WCMD_parameter (context -> command, i + context -> shift_count[i], NULL);
         strcpy (p, t);
         strcat (p, s);
         free (s);
@@ -629,7 +629,7 @@ void WCMD_process_command (char *command)
         WCMD_setshow_env (p);
 	break;
       case WCMD_SHIFT:
-        WCMD_shift ();
+        WCMD_shift (p);
         break;
       case WCMD_TIME:
         WCMD_setshow_time ();