BLI_args: disallow zero to be used as a pass value

Introduced recently in 09139e41ed4ea.
While this worked in the cases it was used, '--threads' for example
was failing to parse the number when it's pass was set to 0.

Increase the enum values to start at 1 &
add asserts so this wont happen again.

2 files changed, 10 insertions, 5 deletions

diff --git a/source/blender/blenlib/intern/BLI_args.c b/source/blender/blenlib/intern/BLI_args.c
index 4a46bf73f78..45061c5a150 100644
--- a/source/blender/blenlib/intern/BLI_args.c
+++ b/source/blender/blenlib/intern/BLI_args.c
@@ -120,6 +120,9 @@ bArgs *BLI_argsInit(int argc, const char **argv)
   ba->argc = argc;
   ba->argv = argv;
 
+  /* Must be initialized by #BLI_argsPassSet. */
+  ba->current_pass = 0;
+
   return ba;
 }
 
@@ -133,6 +136,7 @@ void BLI_argsFree(struct bArgs *ba)
 
 void BLI_argsPassSet(struct bArgs *ba, int current_pass)
 {
+  BLI_assert((current_pass != 0) && (current_pass >= -1));
   ba->current_pass = current_pass;
 }
 
@@ -278,6 +282,7 @@ void BLI_argsPrintOtherDoc(struct bArgs *ba)
 
 void BLI_argsParse(struct bArgs *ba, int pass, BA_ArgCallback default_cb, void *default_data)
 {
+  BLI_assert((pass != 0) && (pass >= -1));
   int i = 0;
 
   for (i = 1; i < ba->argc; i++) { /* skip argv[0] */
diff --git a/source/creator/creator_intern.h b/source/creator/creator_intern.h
index fe8f8c4e20e..5f184e4cef3 100644
--- a/source/creator/creator_intern.h
+++ b/source/creator/creator_intern.h
@@ -57,14 +57,14 @@ extern struct ApplicationState app_state; /* creator.c */
  * Keep in order of execution.
  */
 enum {
-  ARG_PASS_ENVIRONMENT = 0,
-  ARG_PASS_SETTINGS = 1,
+  ARG_PASS_ENVIRONMENT = 1,
+  ARG_PASS_SETTINGS = 2,
   /** Windowing & graphical settings, ignored in background mode. */
-  ARG_PASS_SETTINGS_GUI = 2,
-  ARG_PASS_SETTINGS_FORCE = 3,
+  ARG_PASS_SETTINGS_GUI = 3,
+  ARG_PASS_SETTINGS_FORCE = 4,
 
   /** Actions & fall back to loading blend file. */
-  ARG_PASS_FINAL = 4,
+  ARG_PASS_FINAL = 5,
 };
 
 /* for the callbacks: */