Virgin import of gperf v2.7

1 files changed, 97 insertions, 0 deletions

diff --git a/contrib/gperf/src/read-line.cc b/contrib/gperf/src/read-line.cc
new file mode 100644
index 0000000..8cb0971
--- /dev/null
+++ b/contrib/gperf/src/read-line.cc
@@ -0,0 +1,97 @@
+/* Correctly reads an arbitrarily size string.
+
+   Copyright (C) 1989-1998 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, 59 Temple Place - Suite 330, Boston, MA 02111, USA.  */
+
+#include "read-line.h"
+
+#include <stdlib.h>
+#include <string.h> /* declares memcpy() */
+#include "options.h"
+#include "trace.h"
+
+/* Recursively fills up the buffer. */
+
+#define CHUNK_SIZE 4096
+
+/* CHUNKS is the number of chunks (each of size CHUNK_SIZE) which have
+   already been read and which are temporarily stored on the stack.
+   This function reads the remainder of the line, allocates a buffer
+   for the entire line, fills the part beyond &buffer[chunks*CHUNK_SIZE],
+   and returns &buffer[chunks*CHUNK_SIZE].  */
+
+char *
+Read_Line::readln_aux (int chunks)
+{
+  T (Trace t ("Read_Line::readln_aux");)
+#if LARGE_STACK
+  char buf[CHUNK_SIZE];
+#else
+  // Note: we don't use new, because that invokes a custom operator new.
+  char *buf = (char*)malloc(CHUNK_SIZE);
+  if (buf == NULL)
+    abort ();
+#endif
+  char *bufptr = buf;
+  char *ptr;
+  int c;
+
+  while (c = getc (fp), c != EOF && c != '\n') /* fill the current buffer */
+    {
+      *bufptr++ = c;
+      if (bufptr - buf == CHUNK_SIZE)
+        {
+          if ((ptr = readln_aux (chunks + 1)) != NULL)
+
+            /* prepend remainder to ptr buffer */
+            {
+              ptr -= CHUNK_SIZE;
+              memcpy (ptr, buf, CHUNK_SIZE);
+            }
+
+          goto done;
+        }
+    }
+  if (c == EOF && bufptr == buf && chunks == 0)
+    ptr = NULL;
+  else
+    {
+      size_t s1 = chunks * CHUNK_SIZE;
+      size_t s2 = bufptr - buf;
+
+      ptr = new char[s1+s2+1];
+      ptr += s1;
+      ptr[s2] = '\0';
+      memcpy (ptr, buf, s2);
+    }
+ done:
+#if !LARGE_STACK
+  free (buf);
+#endif
+
+  return ptr;
+}
+
+#ifndef __OPTIMIZE__
+
+#define INLINE /* not inline */
+#include "read-line.icc"
+#undef INLINE
+
+#endif /* not defined __OPTIMIZE__ */