Virgin import of gcc from EGCS 1.1.2

1 files changed, 100 insertions, 0 deletions

diff --git a/contrib/gcc/dyn-string.c b/contrib/gcc/dyn-string.c
new file mode 100644
index 0000000..cfcace9
--- /dev/null
+++ b/contrib/gcc/dyn-string.c
@@ -0,0 +1,100 @@
+/* An abstract string datatype.
+   Copyright (C) 1998 Free Software Foundation, Inc.
+   Contributed by Mark Mitchell (mark@markmitchell.com).
+
+   This file is part of GNU CC.
+   
+   GNU CC 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 2, or (at your option)
+   any later version.
+
+   GNU CC 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 CC; see the file COPYING.  If not, write to the Free
+   Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include "config.h"
+#include "system.h"
+#include "gansidecl.h"
+#include "dyn-string.h"
+
+extern char *xmalloc ();
+extern char *xrealloc ();
+
+/* Create a new dynamic string capable of holding at least SPACE
+   characters, including the terminating NUL.  If SPACE is 0, it
+   will be silently increased to 1.  */
+
+dyn_string_t 
+dyn_string_new (space)
+     int space;
+{
+  dyn_string_t result = (dyn_string_t) xmalloc (sizeof (struct dyn_string));
+ 
+  if (space == 0)
+    /* We need at least one byte in which to store the terminating
+       NUL.  */
+    space = 1;
+
+  result->allocated = space;
+  result->s = (char*) xmalloc (space);
+  result->length = 0;
+  result->s[0] = '\0';
+
+  return result;
+}
+
+/* Free the memory used by DS.  */
+
+void 
+dyn_string_delete (ds)
+     dyn_string_t ds;
+{
+  free (ds->s);
+  free (ds);
+}
+
+/* Append the NUL-terminated string S to DS, resizing DS if
+   necessary.  */
+
+dyn_string_t 
+dyn_string_append (ds, s)
+     dyn_string_t ds;
+     char *s;
+{
+  int len = strlen (s);
+  dyn_string_resize (ds, ds->length + len + 1 /* '\0' */);
+  strcpy (ds->s + ds->length, s);
+  ds->length += len;
+
+  return ds;
+}
+
+/* Increase the capacity of DS so that it can hold at least SPACE
+   characters, including the terminating NUL.  This function will not
+   (at present) reduce the capacity of DS.  */
+
+dyn_string_t 
+dyn_string_resize (ds, space)
+     dyn_string_t ds;
+     int space;
+{
+  int new_allocated = ds->allocated;
+
+  while (space > new_allocated)
+    new_allocated *= 2;
+    
+  if (new_allocated != ds->allocated)
+    {
+      /* We actually need more space.  */
+      ds->allocated = new_allocated;
+      ds->s = (char*) xrealloc (ds->s, ds->allocated);
+    }
+
+  return ds;
+}