1 files changed, 48 insertions, 0 deletions

diff --git a/strbuf.h b/strbuf.h
new file mode 100644
index 0000000..fb07e6f
--- /dev/null
+++ b/strbuf.h
@@ -0,0 +1,48 @@
+#include <stdlib.h>
+#include <stdarg.h>
+
+typedef struct {
+    char *data;
+    int size;   /* Bytes allocated */
+    int length; /* Current length of string, not including NULL */
+    int increment;  /* Allocation Increments */
+} strbuf_t;
+
+#ifndef STRBUF_DEFAULT_INCREMENT
+#define STRBUF_DEFAULT_INCREMENT 8
+#endif
+
+extern void strbuf_init(strbuf_t *s);
+extern strbuf_t *strbuf_new();
+extern void strbuf_free(strbuf_t *s);
+extern char *strbuf_to_char(strbuf_t *s, int *len);
+
+extern void strbuf_set_increment(strbuf_t *s, int increment);
+extern void strbuf_resize(strbuf_t *s, int len);
+extern void strbuf_append_fmt(strbuf_t *s, const char *format, ...);
+extern void strbuf_append_mem(strbuf_t *s, const char *c, int len);
+extern void strbuf_ensure_null(strbuf_t *s);
+
+/* Return bytes remaining in the string buffer
+ * Ensure there is space for a NULL.
+ * Returns -1 if the string has not been allocated yet */
+static inline int strbuf_emptylen(strbuf_t *s)
+{
+    return s->size - s->length - 1;
+}
+
+static inline int strbuf_length(strbuf_t *s)
+{
+    return s->length;
+}
+
+static inline void strbuf_append_char(strbuf_t *s, const char c)
+{
+    if (strbuf_emptylen(s) < 1)
+        strbuf_resize(s, s->length + 1);
+
+    s->data[s->length++] = c;
+}
+
+/* vi:ai et sw=4 ts=4:
+ */