From b5990708483a1fa452b3d4b6ed2bfa998deeeb39 Mon Sep 17 00:00:00 2001
From: rsc <devnull@localhost>
Date: Tue, 30 Sep 2003 17:47:43 +0000
Subject: Initial import.

---
 src/libframe/frstr.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 src/libframe/frstr.c

(limited to 'src/libframe/frstr.c')

diff --git a/src/libframe/frstr.c b/src/libframe/frstr.c
new file mode 100644
index 00000000..950b3e21
--- /dev/null
+++ b/src/libframe/frstr.c
@@ -0,0 +1,37 @@
+#include <u.h>
+#include <libc.h>
+#include <draw.h>
+#include <mouse.h>
+#include <frame.h>
+
+#define	CHUNK	16
+#define	ROUNDUP(n)	((n+CHUNK)&~(CHUNK-1))
+
+uchar *
+_frallocstr(Frame *f, unsigned n)
+{
+	uchar *p;
+
+	p = malloc(ROUNDUP(n));
+	if(p == 0)
+		drawerror(f->display, "out of memory");
+	return p;
+}
+
+void
+_frinsure(Frame *f, int bn, unsigned n)
+{
+	Frbox *b;
+	uchar *p;
+
+	b = &f->box[bn];
+	if(b->nrune < 0)
+		drawerror(f->display, "_frinsure");
+	if(ROUNDUP(b->nrune) > n)	/* > guarantees room for terminal NUL */
+		return;
+	p = _frallocstr(f, n);
+	b = &f->box[bn];
+	memmove(p, b->ptr, NBYTE(b)+1);
+	free(b->ptr);
+	b->ptr = p;
+}
-- 
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