1 files changed, 68 insertions, 0 deletions
diff --git a/lib/libI77/uio.c b/lib/libI77/uio.c
new file mode 100644
index 0000000..e40875e
--- /dev/null
+++ b/lib/libI77/uio.c
@@ -0,0 +1,68 @@
+#include "f2c.h"
+#include "fio.h"
+uiolen f__reclen;
+
+#ifdef KR_headers
+do_us(number,ptr,len) ftnint *number; char *ptr; ftnlen len;
+#else
+do_us(ftnint *number, char *ptr, ftnlen len)
+#endif
+{
+	if(f__reading)
+	{
+		f__recpos += (int)(*number * len);
+		if(f__recpos>f__reclen)
+			err(f__elist->cierr, 110, "do_us");
+		if (fread(ptr,(int)len,(int)(*number),f__cf) != *number)
+			err(f__elist->ciend, EOF, "do_us");
+		return(0);
+	}
+	else
+	{
+		f__reclen += *number * len;
+		(void) fwrite(ptr,(int)len,(int)(*number),f__cf);
+		return(0);
+	}
+}
+#ifdef KR_headers
+integer do_ud(number,ptr,len) ftnint *number; char *ptr; ftnlen len;
+#else
+integer do_ud(ftnint *number, char *ptr, ftnlen len)
+#endif
+{
+	f__recpos += (int)(*number * len);
+	if(f__recpos > f__curunit->url && f__curunit->url!=1)
+		err(f__elist->cierr,110,"do_ud");
+	if(f__reading)
+	{
+#ifdef Pad_UDread
+#ifdef KR_headers
+	int i;
+#else
+	size_t i;
+#endif
+		if (!(i = fread(ptr,(int)len,(int)(*number),f__cf))
+		 && !(f__recpos - *number*len))
+			err(f__elist->cierr,EOF,"do_ud")
+		if (i < *number)
+			memset(ptr + i*len, 0, (*number - i)*len);
+		return 0;
+#else
+		if(fread(ptr,(int)len,(int)(*number),f__cf) != *number)
+			err(f__elist->cierr,EOF,"do_ud")
+		else return(0);
+#endif
+	}
+	(void) fwrite(ptr,(int)len,(int)(*number),f__cf);
+	return(0);
+}
+#ifdef KR_headers
+integer do_uio(number,ptr,len) ftnint *number; char *ptr; ftnlen len;
+#else
+integer do_uio(ftnint *number, char *ptr, ftnlen len)
+#endif
+{
+	if(f__sequential)
+		return(do_us(number,ptr,len));
+	else	return(do_ud(number,ptr,len));
+}