BSD 4_3_Net_2 development

Work on file usr/src/lib/libg++/grot/gperf/src/read-line.h
Work on file usr/src/lib/libg++/grot/gperf/src/read-line.cc

Synthesized-from: CSRG/cd2/net.2

diff --git a/usr/src/lib/libg++/grot/gperf/src/read-line.cc b/usr/src/lib/libg++/grot/gperf/src/read-line.cc
new file mode 100644 (file)
index 0000000..a293937
--- /dev/null
+++ b/usr/src/lib/libg++/grot/gperf/src/read-line.cc
@@ -0,0 +1,84 @@
+/* Correctly reads an arbitrarily size string.
+
+   Copyright (C) 1989 Free Software Foundation, Inc.
+   written by Douglas C. Schmidt (schmidt@ics.uci.edu)
+
+This file is part of GNU GPERF.
+
+GNU GPERF is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU GPERF is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU GPERF; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <std.h>
+#include "std-err.h"
+#include "read-line.h"
+
+/* Recursively fills up the buffer. */
+
+char *
+Read_Line::readln_aux (int chunks)
+{
+  T (Trace t ("Read_Line::readln_aux");)
+  char buf[CHUNK_SIZE];
+  char *bufptr = buf;
+  char *ptr;
+  int c;
+
+  while ((c = getc (fp)) != EOF && c != '\n') /* fill the current buffer */
+    {
+      *bufptr++ = c;
+      if (bufptr - buf >= CHUNK_SIZE) /* prepend remainder to ptr buffer */
+        {
+          if (ptr = readln_aux (chunks + 1))
+
+            for (; bufptr != buf; *--ptr = *--bufptr);
+
+          return ptr;
+        }
+    }
+  if (c == EOF && bufptr == buf)
+    return 0;
+
+  c   = chunks * CHUNK_SIZE + bufptr - buf + 1;
+  ptr = new char[c];
+
+  for (*(ptr += (c - 1)) = '\0'; bufptr != buf; *--ptr = *--bufptr)
+    ;
+
+  return ptr;
+}
+
+#ifndef __OPTIMIZE__
+
+/* Returns the ``next'' line, ignoring comments beginning with '#'. */
+
+char *
+Read_Line::get_line (void) 
+{
+  T (Trace t ("Read_Line::get_line");)
+  int c;
+
+  if ((c = getc (fp)) == '#')
+    {
+      while ((c = getc (fp)) != '\n' && c != EOF)
+        ;
+
+      return c != EOF ? get_line () : 0;
+    }
+  else
+    {
+      ungetc (c, stdin);
+      return readln_aux (0);
+    }
+}
+#endif

diff --git a/usr/src/lib/libg++/grot/gperf/src/read-line.h b/usr/src/lib/libg++/grot/gperf/src/read-line.h
new file mode 100644 (file)
index 0000000..8552a4f
--- /dev/null
+++ b/usr/src/lib/libg++/grot/gperf/src/read-line.h
@@ -0,0 +1,65 @@
+/* This may look like C code, but it is really -*- C++ -*- */
+
+/* Reads arbitrarily long string from input file, returning it as a dynamic buffer. 
+
+   Copyright (C) 1989 Free Software Foundation, Inc.
+   written by Douglas C. Schmidt (schmidt@ics.uci.edu)
+
+This file is part of GNU GPERF.
+
+GNU GPERF is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 1, or (at your option)
+any later version.
+
+GNU GPERF is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU GPERF; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Returns a pointer to an arbitrary length string.  Returns NULL on error or EOF
+   The storage for the string is dynamically allocated by new. */
+
+#pragma once
+#include <stdio.h>
+#include "trace.h"
+
+class Read_Line
+{
+private:
+  char *readln_aux (int chunks);
+  FILE *fp;                       /* FILE pointer to the input stream. */
+  const int CHUNK_SIZE;               /* Size of each chunk. */
+
+public:
+        Read_Line (FILE *stream = stdin, int size = BUFSIZ): 
+          fp (stream), CHUNK_SIZE (size) {;}
+  char *get_line (void);
+};
+
+#ifdef __OPTIMIZE__
+inline char *
+Read_Line::get_line (void) 
+{
+  T (Trace t ("Read_Line::get_line");)
+  int c;
+
+  if ((c = getc (fp)) == '#')
+    {
+      while (getc (fp) != '\n')
+        ;
+
+      return get_line ();
+    }
+  else
+    {
+      ungetc (c, stdin);
+      return readln_aux (0);
+    }
+}
+#endif
+