1 files changed, 41 insertions, 0 deletions
diff --git a/include/fitz/buffer.h b/include/fitz/buffer.h
new file mode 100644
index 00000000..1a6f34ad
--- /dev/null
+++ b/include/fitz/buffer.h
@@ -0,0 +1,41 @@
+/*
+ * Data buffers for streams and filters.
+ *
+ *   bp is the pointer to the allocated memory
+ *   rp is read-position (*in->rp++ to read data)
+ *   wp is write-position (*out->wp++ to write data)
+ *   ep is the sentinel
+ *
+ * Only the data between rp and wp is valid data.
+ *
+ * Writers set eof to true at the end.
+ * Readers look at eof.
+ *
+ * A buffer owns the memory it has allocated, unless ownsdata is false,
+ * in which case the creator of the buffer owns it.
+ */
+
+typedef struct fz_buffer_s fz_buffer;
+
+#define FZ_BUFSIZE (8 * 1024)
+
+struct fz_buffer_s
+{
+	int refs;
+	int ownsdata;
+	unsigned char *bp;
+	unsigned char *rp;
+	unsigned char *wp;
+	unsigned char *ep;
+	int eof;
+};
+
+fz_error *fz_newbuffer(fz_buffer **bufp, int size);
+fz_error *fz_newbufferwithmemory(fz_buffer **bufp, unsigned char *data, int size);
+
+fz_error *fz_rewindbuffer(fz_buffer *buf);
+fz_error *fz_growbuffer(fz_buffer *buf);
+
+fz_buffer *fz_keepbuffer(fz_buffer *buf);
+void fz_dropbuffer(fz_buffer *buf);
+