1 files changed, 0 insertions, 69 deletions
diff --git a/lib/libI77/backspace.c b/lib/libI77/backspace.c
deleted file mode 100644
index c3fa545..0000000
--- a/lib/libI77/backspace.c
+++ /dev/null
@@ -1,69 +0,0 @@
-#include "f2c.h"
-#include "fio.h"
-#ifdef KR_headers
-integer f_back(a) alist *a;
-#else
-integer f_back(alist *a)
-#endif
-{	unit *b;
-	long v, w, x, y, z;
-	uiolen n;
-	FILE *f;
-
-	f__curunit = b = &f__units[a->aunit];	/* curunit for error messages */
-	if(a->aunit >= MXUNIT || a->aunit < 0)
-		err(a->aerr,101,"backspace")
-	if(b->useek==0) err(a->aerr,106,"backspace")
-	if((f = b->ufd) == NULL) {
-		fk_open(1, 1, a->aunit);
-		return(0);
-		}
-	if(b->uend==1)
-	{	b->uend=0;
-		return(0);
-	}
-	if(b->uwrt) {
-		(void) t_runc(a);
-		if (f__nowreading(b))
-			err(a->aerr,errno,"backspace")
-		}
-	if(b->url>0)
-	{
-		x=ftell(f);
-		y = x % b->url;
-		if(y == 0) x--;
-		x /= b->url;
-		x *= b->url;
-		(void) fseek(f,x,SEEK_SET);
-		return(0);
-	}
-
-	if(b->ufmt==0)
-	{	fseek(f,-(long)sizeof(uiolen),SEEK_CUR);
-		fread((char *)&n,sizeof(uiolen),1,f);
-		fseek(f,-(long)n-2*sizeof(uiolen),SEEK_CUR);
-		return(0);
-	}
-	w = x = ftell(f);
-	z = 0;
- loop:
-	while(x) {
-		x -= x < 64 ? x : 64;
-		fseek(f,x,SEEK_SET);
-		for(y = x; y < w; y++) {
-			if (getc(f) != '\n')
-				continue;
-			v = ftell(f);
-			if (v == w) {
-				if (z)
-					goto break2;
-				goto loop;
-				}
-			z = v;
-			}
-		err(a->aerr,(EOF),"backspace")
-		}
- break2:
-	fseek(f, z, SEEK_SET);
-	return 0;
-}