1 files changed, 26 insertions, 0 deletions
diff --git a/src/strutil.h b/src/strutil.h
new file mode 100644
index 0000000..03f8294
--- /dev/null
+++ b/src/strutil.h
@@ -0,0 +1,26 @@
+#ifndef STRUTIL_H
+#define STRUTIL_H
+
+//
+// Defines various utilities for working with strings.
+//
+
+#include "arena.h"   // struct arena
+#include <stdbool.h> // bool
+#include <stdarg.h>  // va_list
+
+// Like asprintf except the allocation is made inside the given arena.
+// Panics on allocation failure.
+int aprintf(struct arena *a, char **out, const char *fmt, ...);
+
+// Same as aprintf, except takes a varargs list.
+int vaprintf(struct arena *a, char **out, const char *fmt, va_list args);
+
+// Join the two paths with a directory separator.
+// Result is allocated in arena.
+char *joinpath(struct arena *a, const char *path_a, const char *path_b);
+
+// Returns boolean indicating if `haystack` ends with `needle`.
+bool endswith(const char *haystack, const char *needle);
+
+#endif