From d600a6b5b358c28d482b01f10bfa3292b17f5d12 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Tue, 16 Sep 1997 16:25:59 -0300
Subject: a generic input stream interface

---
 lzio.h | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)
 create mode 100644 lzio.h

(limited to 'lzio.h')

diff --git a/lzio.h b/lzio.h
new file mode 100644
index 00000000..31ce948e
--- /dev/null
+++ b/lzio.h
@@ -0,0 +1,49 @@
+/*
+** $Id: $
+** Buffered streams
+** See Copyright Notice in lua.h
+*/
+
+
+#ifndef lzio_h
+#define lzio_h
+
+#include <stdio.h>
+
+
+
+/* For Lua only */
+#define zFopen	luaZ_Fopen
+#define zsopen	luaZ_sopen
+#define zmopen	luaZ_mopen
+#define zread	luaZ_read
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct zio ZIO;
+
+ZIO* zFopen(ZIO* z, FILE* f);		/* open FILEs */
+ZIO* zsopen(ZIO* z, char* s);		/* string */
+ZIO* zmopen(ZIO* z, char* b, int size);	/* memory */
+
+int zread(ZIO* z, void* b, int n);	/* read next n bytes */
+
+#define zgetc(z)	(--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
+#define zungetc(z)	(++(z)->n,--(z)->p)
+
+
+
+/* --------- Private Part ------------------ */
+
+#define ZBSIZE	256			/* buffer size */
+
+struct zio {
+ int n;					/* bytes still unread */
+ unsigned char* p;			/* current position in buffer */
+ int (*filbuf)(ZIO* z);
+ void* u;				/* additional data */
+ unsigned char buffer[ZBSIZE];		/* buffer */
+};
+
+
+#endif
-- 
cgit v1.2.3-55-g6feb