From 7f30a03f9411d2169ee9e413ceb8f5b9c07dc120 Mon Sep 17 00:00:00 2001
From: Zeex <zeex@rocketmail.com>
Date: Mon, 7 Apr 2014 22:24:52 +0700
Subject: [PATCH] Ignore #pragma tabsize with non-positive arguments

#pragma tabsize X will now have no effect for X <= 0. Same goes for
the -t option (will display usage instead).

Closes #24.
---
 source/compiler/sc1.c | 6 +++++-
 source/compiler/sc2.c | 3 ++-
 2 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/source/compiler/sc1.c b/source/compiler/sc1.c
index 590b7e6..f69f439 100644
--- a/source/compiler/sc1.c
+++ b/source/compiler/sc1.c
@@ -1098,7 +1098,11 @@ static void parseoptions(int argc,char **argv,char *oname,char *ename,char *pnam
         skipinput=atoi(option_value(ptr));
         break;
       case 't':
-        sc_tabsize=atoi(option_value(ptr));
+        i=atoi(option_value(ptr));
+        if (i>0)
+          sc_tabsize=i;
+        else
+          about();
         break;
       case 'v':
         verbosity= isdigit(*option_value(ptr)) ? atoi(option_value(ptr)) : 2;
diff --git a/source/compiler/sc2.c b/source/compiler/sc2.c
index 14d62de..6315ca3 100644
--- a/source/compiler/sc2.c
+++ b/source/compiler/sc2.c
@@ -1144,7 +1144,8 @@ static int command(void)
         } else if (strcmp(str,"tabsize")==0) {
           cell val;
           preproc_expr(&val,NULL);
-          sc_tabsize=(int)val;
+          if (val>0)
+            sc_tabsize=(int)val;
         } else if (strcmp(str,"align")==0) {
           sc_alignnext=TRUE;
         } else if (strcmp(str,"unused")==0) {