1 files changed, 47 insertions, 0 deletions

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