first commit

str.c

@@ -0,0 +1,57 @@
+#include <assert.h>
+#include <string.h>
+#include <stdlib.h>
+#include "str.h"
+#include "util.h"
+
+#define INIT_SZ 20
+
+void
+str_init(str *s)
+{
+	assert(s);
+	// <YOURCODE>
+}
+
+void
+str_deinit(str *s)
+{
+	if (s->ptr)
+		free(s->ptr);
+	s->ptr = NULL;
+}
+
+void
+str_init_data(str *s, const char *initial)
+{
+	assert(s && initial);
+	// <YOURCODE>
+}
+
+char *
+str_data(str *s)
+{
+	assert(s);
+	// <YOURCODE>
+	return NULL;
+}
+
+str
+str_copy(str *s)
+{
+	assert(s);
+	// <YOURCODE>
+}
+
+void
+str_append(str *s, char *p)
+{
+	// <YOURCODE>
+}
+
+void
+str_shrink(str *s, int sz)
+{
+	assert(s && sz >= 0);
+	// <YOURCODE>
+}