From 9fe5be3acf340b90fe0c24d36a601adaf6f21c79 Mon Sep 17 00:00:00 2001
From: Roberto Ierusalimschy <roberto@inf.puc-rio.br>
Date: Mon, 16 Jun 1997 13:50:22 -0300
Subject: library for uniform buffered input.

---
 zio.h | 47 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 47 insertions(+)
 create mode 100644 zio.h

(limited to 'zio.h')

diff --git a/zio.h b/zio.h
new file mode 100644
index 00000000..7f25b0ad
--- /dev/null
+++ b/zio.h
@@ -0,0 +1,47 @@
+/*
+* zio.h
+* a generic input stream interface
+* $Id: zio.h,v 1.4 1997/06/13 13:49:16 lhf Exp $
+*/
+
+#ifndef zio_h
+#define zio_h
+
+#include <stdio.h>
+
+#define EOZ	(-1)			/* end of stream */
+
+typedef struct zio ZIO;
+
+int zgetc(ZIO* z);			/* get next byte */
+int zungetc(ZIO* z);			/* put back last byte read */
+int zread(ZIO* z, void* b, int n);	/* read next n bytes */
+int zclose(ZIO* z);			/* close stream */
+
+ZIO* zFopen(ZIO* z, FILE* f);		/* open FILEs */
+ZIO* zfopen(ZIO* z, char* s, char* m);	/* file by name */
+ZIO* zpopen(ZIO* z, char* s, char* m);	/* pipe */
+ZIO* zsopen(ZIO* z, char* s);		/* string */
+ZIO* zmopen(ZIO* z, char* b, int size);	/* memory */
+
+#define zgetc(z)	(--(z)->n>=0 ? ((int)*(z)->p++): (z)->filbuf(z))
+#define zungetc(z)	(++(z)->n,--(z)->p)
+#define zclose(z)	(*(z)->close)(z)
+
+
+
+/* --------- 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);
+ int (*close)(ZIO* z);
+ void* u;				/* additional data */
+ unsigned char buffer[ZBSIZE];		/* buffer */
+};
+
+
+#endif
-- 
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