1 files changed, 76 insertions, 0 deletions
diff --git a/src/cmd/devdraw/winsize.c b/src/cmd/devdraw/winsize.c
new file mode 100644
index 00000000..375401bf
--- /dev/null
+++ b/src/cmd/devdraw/winsize.c
@@ -0,0 +1,76 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <memdraw.h>
+#include "devdraw.h"
+
+int
+parsewinsize(char *s, Rectangle *r, int *havemin)
+{
+	char c, *os;
+	int i, j, k, l;
+
+	os = s;
+	*havemin = 0;
+	*r = Rect(0,0,0,0);
+	if(!isdigit((uchar)*s))
+		goto oops;
+	i = strtol(s, &s, 0);
+	if(*s == 'x'){
+		s++;
+		if(!isdigit((uchar)*s))
+			goto oops;
+		j = strtol(s, &s, 0);
+		r->max.x = i;
+		r->max.y = j;
+		if(*s == 0)
+			return 0;
+		if(*s != '@')
+			goto oops;
+
+		s++;
+		if(!isdigit((uchar)*s))
+			goto oops;
+		i = strtol(s, &s, 0);
+		if(*s != ',' && *s != ' ')
+			goto oops;
+		s++;
+		if(!isdigit((uchar)*s))
+			goto oops;
+		j = strtol(s, &s, 0);
+		if(*s != 0)
+			goto oops;
+		*r = rectaddpt(*r, Pt(i,j));
+		*havemin = 1;
+		return 0;
+	}
+
+	c = *s;
+	if(c != ' ' && c != ',')
+		goto oops;
+	s++;
+	if(!isdigit((uchar)*s))
+		goto oops;
+	j = strtol(s, &s, 0);
+	if(*s != c)
+		goto oops;
+	s++;
+	if(!isdigit((uchar)*s))
+		goto oops;
+	k = strtol(s, &s, 0);
+	if(*s != c)
+		goto oops;
+	s++;
+	if(!isdigit((uchar)*s))
+		goto oops;
+	l = strtol(s, &s, 0);
+	if(*s != 0)
+		goto oops;
+	*r = Rect(i,j,k,l);
+	*havemin = 1;
+	return 0;
+
+oops:
+	werrstr("bad syntax in window size '%s'", os);
+	return -1;
+}