(move_range): New function.

[pspp-builds.git] / src / libpspp / pool.c

diff --git a/src/libpspp/pool.c b/src/libpspp/pool.c
index d4c00b38037a6d754dbde33b6cb5774d3aebe891..c39852dcc7a2977becee7d8c0b970c11d52471d4 100644 (file)
--- a/src/libpspp/pool.c
+++ b/src/libpspp/pool.c
@@ -1,6 +1,5 @@
 /* PSPP - computes sample statistics.
    Copyright (C) 2000 Free Software Foundation, Inc.
-   Written by Ben Pfaff <blp@gnu.org>.
 
    This program is free software; you can redistribute it and/or
    modify it under the terms of the GNU General Public License as
@@ -101,8 +100,8 @@ union align
 
 /* DISCRETE_BLOCKS may be declared as nonzero to prevent
    suballocation of blocks.  This is useful under memory
-   debuggers like Checker or valgrind because it allows the
-   source location of bugs to be more accurately pinpointed.
+   debuggers like valgrind because it allows the source location
+   of bugs to be more accurately pinpointed.
 
    On the other hand, if we're testing the library, then we want to
    test the library's real functionality, not its crippled, slow,
@@ -473,6 +472,34 @@ pool_nmalloc (struct pool *pool, size_t n, size_t s)
   return pool_malloc (pool, n * s);
 }
 
+/* Allocates AMT bytes using malloc(), to be managed by POOL,
+   zeros the block, and returns a pointer to the beginning of the
+   block.
+   If POOL is a null pointer, then allocates a normal memory block
+   with xmalloc().  */
+void *
+pool_zalloc (struct pool *pool, size_t amt)
+{
+  void *p = pool_malloc (pool, amt);
+  memset (p, 0, amt);
+  return p;
+}
+
+/* Allocates and returns N elements of S bytes each, to be
+   managed by POOL, and zeros the block.
+   If POOL is a null pointer, then allocates a normal memory block
+   with malloc().
+   N must be nonnegative, S must be positive.
+   Terminates the program if the memory cannot be obtained,
+   including the case where N * S overflows the range of size_t. */
+void *
+pool_calloc (struct pool *pool, size_t n, size_t s) 
+{
+  void *p = pool_nmalloc (pool, n, s);
+  memset (p, 0, n * s);
+  return p;
+}
+
 /* Changes the allocation size of the specified memory block P managed
    by POOL to AMT bytes and returns a pointer to the beginning of the
    block.
@@ -700,8 +727,8 @@ pool_fopen (struct pool *pool, const char *file_name, const char *mode)
 
   assert (pool && file_name && mode);
   f = fopen (file_name, mode);
-  if (f == NULL)
-    return NULL;
+  if (f != NULL)
+    pool_attach_file (pool, f);
 
   return f;
 }
@@ -777,8 +804,8 @@ pool_register (struct pool *pool, void (*free) (void *), void *p)
 }
 
 /* Unregisters previously registered P from POOL.
-   Returns nonzero only if P was found to be registered in POOL. */
-int
+   Returns true only if P was found to be registered in POOL. */
+bool
 pool_unregister (struct pool *pool, void *p)
 {
   assert (pool && p);
@@ -790,11 +817,11 @@ pool_unregister (struct pool *pool, void *p)
       if (g->type == POOL_GIZMO_REGISTERED && g->p.registered.p == p)
        {
          delete_gizmo (pool, g);
-         return 1;
+         return true;
        }
   }
   
-  return 0;
+  return false;
 }
 \f
 /* Partial freeing. */