*** empty log message ***

[gnulib.git] / lib / linebuffer.c

diff --git a/lib/linebuffer.c b/lib/linebuffer.c
index d401683..3b15d1f 100644 (file)
--- a/lib/linebuffer.c
+++ b/lib/linebuffer.c
@@ -1,5 +1,5 @@
 /* linebuffer.c -- read arbitrarily long lines
-   Copyright (C) 1986, 1991, 1998 Free Software Foundation, Inc.
+   Copyright (C) 1986, 1991, 1998, 1999 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -12,8 +12,8 @@
    GNU General Public License for more details.
 
    You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+   along with this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
 
 /* Written by Richard Stallman. */
 \f
@@ -22,6 +22,7 @@
 #endif
 
 #include <stdio.h>
+#include <sys/types.h>
 #include "linebuffer.h"
 
 char *xmalloc ();
@@ -31,8 +32,7 @@ void free ();
 /* Initialize linebuffer LINEBUFFER for use. */
 
 void
-initbuffer (linebuffer)
-     struct linebuffer *linebuffer;
+initbuffer (struct linebuffer *linebuffer)
 {
   linebuffer->length = 0;
   linebuffer->size = 200;
@@ -40,14 +40,12 @@ initbuffer (linebuffer)
 }
 
 /* Read an arbitrarily long line of text from STREAM into LINEBUFFER.
-   Remove any newline.  Does not null terminate.
-   Return zero upon error or upon end of file.
-   Otherwise, return LINEBUFFER.  */
+   Keep the newline; append a newline if it's the last line of a file
+   that ends in a non-newline character.  Do not null terminate.
+   Return LINEBUFFER, except at end of file return 0.  */
 
 struct linebuffer *
-readline (linebuffer, stream)
-     struct linebuffer *linebuffer;
-     FILE *stream;
+readline (struct linebuffer *linebuffer, FILE *stream)
 {
   int c;
   char *buffer = linebuffer->buffer;
@@ -55,41 +53,39 @@ readline (linebuffer, stream)
   char *end = buffer + linebuffer->size; /* Sentinel. */
 
   if (feof (stream) || ferror (stream))
-    {
-      linebuffer->length = 0;
-      return 0;
-    }
+    return 0;
 
-  while (1)
+  do
     {
       c = getc (stream);
+      if (c == EOF)
+       {
+         if (p == buffer)
+           return 0;
+         if (p[-1] == '\n')
+           break;
+         c = '\n';
+       }
       if (p == end)
        {
          linebuffer->size *= 2;
          buffer = (char *) xrealloc (buffer, linebuffer->size);
-         p += buffer - linebuffer->buffer;
+         p = p - linebuffer->buffer + buffer;
          linebuffer->buffer = buffer;
          end = buffer + linebuffer->size;
        }
-      if (c == EOF || c == '\n')
-       break;
       *p++ = c;
     }
+  while (c != '\n');
 
-  if (feof (stream) && p == buffer)
-    {
-      linebuffer->length = 0;
-      return 0;
-    }
-  linebuffer->length = p - linebuffer->buffer;
+  linebuffer->length = p - buffer;
   return linebuffer;
 }
 
 /* Free linebuffer LINEBUFFER and its data, all allocated with malloc. */
 
 void
-freebuffer (linebuffer)
-     struct linebuffer *linebuffer;
+freebuffer (struct linebuffer *linebuffer)
 {
   free (linebuffer->buffer);
   free (linebuffer);