1 files changed, 42 insertions, 0 deletions
diff --git a/string.c b/string.c
new file mode 100644
index 0000000..d8a6429
--- /dev/null
+++ b/string.c
@@ -0,0 +1,42 @@
+#include<u.h>
+#include<libc.h>
+#include<mheap.h>
+
+const char *
+hprint(char *fmt, ...)
+{
+	char *buf, *hbuf;
+	int len, n;
+	va_list args;
+	
+	/* Initial buffer */
+	len = 512;
+	buf = nil;
+	
+	do{
+		len <<= 1;
+		buf = realloc(buf, len);
+		if(buf == nil)
+			sysfatal("hsprint: %r");
+		
+		va_start(args, fmt);
+		n = vsnprint(buf, len, fmt, args) + 1;
+		va_end(args);
+	}while(n == len);
+	
+	hbuf = halloc(n);
+	memmove(hbuf, buf, n);
+	free(buf);
+	
+	return hbuf;
+}
+
+const char *
+hstrdup(char *s)
+{
+	char *u;
+	
+	u = halloc(strlen(s) + 1);
+	memmove(u, s, strlen(s) + 1);
+	return u;
+}