backspace.c: (f_back): Use type `uiolen' to determine size of record length specifier.

        * libI77/backspace.c: (f_back): Use type `uiolen' to determine size
        of record length specifier.

From-SVN: r17815

diff --git a/gcc/f/runtime/ChangeLog.egcs b/gcc/f/runtime/ChangeLog.egcs
index 9f0680be7e8d1eb4022763b8f0df2c9358fcb7d4..8e4683d761395f812e9bc532846c922489c5bf92 100644 (file)
--- a/gcc/f/runtime/ChangeLog.egcs
+++ b/gcc/f/runtime/ChangeLog.egcs
@@ -1,3 +1,8 @@
+Mon Feb  9 22:33:43 1998  Toon Moene  <toon@moene.indiv.nluug.nl>
+
+       * libI77/backspace.c: (f_back): Use type `uiolen' to determine size
+       of record length specifier.
+
 Tue Nov 18 09:49:04 1997  Mumit Khan   (khan@xraylith.wisc.edu)
 
        * libI77/close.c (f_exit): Reset f__init so that f_clos does not

diff --git a/gcc/f/runtime/libI77/backspace.c b/gcc/f/runtime/libI77/backspace.c
index 8413d5f68210f5eb86003f33bd7d6f8887fcc53c..14afe413a454cc7465c6177d6cda95e201120712 100644 (file)
--- a/gcc/f/runtime/libI77/backspace.c
+++ b/gcc/f/runtime/libI77/backspace.c
@@ -1,101 +1,5 @@
-#include <sys/types.h>
-#include "f2c.h"
-#include "fio.h"
-#ifdef KR_headers
-integer f_back(a) alist *a;
-#else
-integer f_back(alist *a)
-#endif
-{      unit *b;
-       int i, n, ndec;
-#if defined (MSDOS) && !defined (GO32)
-       int j, k;
-       long w, z;
-#endif
-       long x, y;
-       char buf[32];
-       if (f__init & 2)
-               f__fatal (131, "I/O recursion");
-       if(a->aunit >= MXUNIT || a->aunit < 0)
-               err(a->aerr,101,"backspace");
-       b= &f__units[a->aunit];
-       if(b->useek==0) err(a->aerr,106,"backspace");
-       if(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(b->ufd);
-               y = x % b->url;
-               if(y == 0) x--;
-               x /= b->url;
-               x *= b->url;
-               (void) fseek(b->ufd,x,SEEK_SET);
-               return(0);
-       }
-
-       if(b->ufmt==0)
-       {       (void) fseek(b->ufd,-(long)sizeof(int),SEEK_CUR);
-               (void) fread((char *)&n,sizeof(int),1,b->ufd);
-               (void) fseek(b->ufd,-(long)n-2*sizeof(int),SEEK_CUR);
-               return(0);
-       }
-#if defined (MSDOS) && !defined (GO32)
-       w = -1;
-#endif
-       for(ndec = 1;; ndec = 0)
-       {
-               y = x = ftell(b->ufd);
-               if(x < sizeof(buf))
-                       x = 0;
-               else
-                       x -= sizeof(buf);
-               (void) fseek(b->ufd,x,SEEK_SET);
-               n=fread(buf,1,(size_t)(y-x), b->ufd);
-               for(i = n - ndec; --i >= 0; )
-               {
-                       if(buf[i]!='\n') continue;
-#if defined (MSDOS) && !defined (GO32)
-                       for(j = k = 0; j <= i; j++)
-                               if (buf[j] == '\n')
-                                       k++;
-                       fseek(b->ufd,x,SEEK_SET);
-                       for(;;)
-                               if (getc(b->ufd) == '\n') {
-                                       if ((z = ftell(b->ufd)) >= y && ndec) {
-                                               if (w == -1)
-                                                       goto break2;
-                                               break;
-                                               }
-                                       if (--k <= 0)
-                                               return 0;
-                                       w = z;
-                                       }
-                       fseek(b->ufd, w, SEEK_SET);
-#else
-                       fseek(b->ufd,(long)(i+1-n),SEEK_CUR);
-#endif
-                       return(0);
-               }
-#if defined (MSDOS) && !defined (GO32)
- break2:
-#endif
-               if(x==0)
-                       {
-                       (void) fseek(b->ufd, 0L, SEEK_SET);
-                       return(0);
-                       }
-               else if(n<=0) err(a->aerr,(EOF),"backspace");
-               (void) fseek(b->ufd, x, SEEK_SET);
-       }
-}
+       int i, ndec;
+       uiolen n;
+       {       (void) fseek(b->ufd,-(long)sizeof(uiolen),SEEK_CUR);
+               (void) fread((char *)&n,sizeof(uiolen),1,b->ufd);
+               (void) fseek(b->ufd,-(long)n-2*sizeof(uiolen),SEEK_CUR);