From: kramm <kramm>
Date: Sun, 2 Dec 2001 11:01:56 +0000 (+0000)
Subject: new function is_in_range.
X-Git-Tag: release-0-2-1~75
X-Git-Url: http://git.asbjorn.biz/?p=swftools.git;a=commitdiff_plain;h=c69748fd50a518c8ca50e24b2e75b5614ac7d2f1

new function is_in_range.
---

diff --git a/lib/args.h b/lib/args.h
index 2d5c661..f8cda88 100644
--- a/lib/args.h
+++ b/lib/args.h
@@ -115,4 +115,79 @@ int args_long2shortoption(struct options_t*options, char*name, char*val)
     exit(1);
 }
 
+/* check whether the value t is in a given range.
+  examples: 3 is in range 1-10: true
+            7 is in range 2-4,6,8-10: false
+	    9 is in range 1,2,3-12: true
+*/
+char is_in_range(int t, char*irange)
+{
+    char*pos = irange;
+    char*digits;
+    int num;
+    char range = 0;
+    int last=0;
+    char tmp;
+
+    if(!irange)  // no range resembles (-OO,OO)
+	return 1;
+
+    while(*pos)
+    {
+	while(*pos == ' ' || *pos == '\r' || *pos == '\n' || *pos == '\t')
+	    pos++;
+
+	digits = pos;
+	while(*digits>='0' && *digits<='9')
+	    digits++;
+	if(digits == pos) {
+	    fprintf(stderr, "Error: \"%s\" is not a valid format (digit expected)\n",irange);
+	    exit(1);
+        }
+	
+	tmp=*digits;*digits=0;
+	num = atoi(pos);
+	*digits=tmp;
+	pos = digits;
+
+	while(*pos == ' ' || *pos == '\r' || *pos == '\n' || *pos == '\t')
+	    pos++;
+
+	if(range && last<=t && num>=t)
+	    return 1;
+	if(range) {
+	    range = 0;
+	    if(*pos)
+	     pos ++;
+	    continue;
+	}
+
+	if(*pos=='-')
+	{
+	    if(range) {
+		fprintf(stderr, "Error: \"%s\" is not a valid format (too many '-'s)\n",irange);
+		exit(1);
+	    }
+	    last = num;
+	    range = 1;
+	    if(*pos)
+	     pos ++;
+	    continue;
+	} 
+	else 
+	{
+	    /* if it isn't a '-', we assume it is a seperator like
+	       ',', ';', ':', whatever. */
+	    if(t == num)
+		return 1;
+	    if(*pos)
+	     pos ++;
+	    continue;
+	}
+    }
+    if(range && last<=t)
+	return 1;
+    return 0;
+}
+
 #endif //__args_h__