1 files changed, 359 insertions, 0 deletions
diff --git a/src/util/common_allocation.c b/src/util/common_allocation.c
new file mode 100644
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--- /dev/null
+++ b/src/util/common_allocation.c
@@ -0,0 +1,359 @@
+/*
+     This file is part of GNUnet.
+     (C) 2001, 2002, 2003, 2005, 2006 Christian Grothoff (and other contributing authors)
+
+     GNUnet 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.
+
+     GNUnet 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 GNUnet; see the file COPYING.  If not, write to the
+     Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+     Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file util/common_allocation.c
+ * @brief wrapper around malloc/free
+ * @author Christian Grothoff
+ */
+
+#include "platform.h"
+#include "gnunet_common.h"
+
+#define LOG(kind,...) GNUNET_log_from (kind, "util",__VA_ARGS__)
+
+#define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util", syscall)
+
+#ifndef INT_MAX
+#define INT_MAX 0x7FFFFFFF
+#endif
+
+#if 0
+#define W32_MEM_LIMIT 200000000
+#endif
+
+#ifdef W32_MEM_LIMIT
+static LONG mem_used = 0;
+#endif
+
+/**
+ * Allocate memory. Checks the return value, aborts if no more
+ * memory is available.
+ *
+ * @param size how many bytes of memory to allocate, do NOT use
+ *  this function (or GNUNET_malloc) to allocate more than several MB
+ *  of memory, if you are possibly needing a very large chunk use
+ *  GNUNET_xmalloc_unchecked_ instead.
+ * @param filename where in the code was the call to GNUNET_malloc
+ * @param linenumber where in the code was the call to GNUNET_malloc
+ * @return pointer to size bytes of memory
+ */
+void *
+GNUNET_xmalloc_ (size_t size, const char *filename, int linenumber)
+{
+  void *ret;
+
+  /* As a security precaution, we generally do not allow very large
+   * allocations using the default 'GNUNET_malloc' macro */
+  GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED, filename, linenumber);
+  ret = GNUNET_xmalloc_unchecked_ (size, filename, linenumber);
+  if (ret == NULL)
+  {
+    LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "malloc");
+    GNUNET_abort ();
+  }
+  return ret;
+}
+
+
+/**
+ * Allocate and initialize memory. Checks the return value, aborts if no more
+ * memory is available.  Don't use GNUNET_xmemdup_ directly. Use the
+ * GNUNET_memdup macro.
+ *
+ * @param buf buffer to initialize from (must contain size bytes)
+ * @param size number of bytes to allocate
+ * @param filename where is this call being made (for debugging)
+ * @param linenumber line where this call is being made (for debugging)
+ * @return allocated memory, never NULL
+ */
+void *
+GNUNET_xmemdup_ (const void *buf, size_t size, const char *filename,
+                 int linenumber)
+{
+  void *ret;
+
+  /* As a security precaution, we generally do not allow very large
+   * allocations here */
+  GNUNET_assert_at (size <= GNUNET_MAX_MALLOC_CHECKED, filename, linenumber);
+#ifdef W32_MEM_LIMIT
+  size += sizeof (size_t);
+  if (mem_used + size > W32_MEM_LIMIT)
+    return NULL;
+#endif
+  GNUNET_assert_at (size < INT_MAX, filename, linenumber);
+  ret = malloc (size);
+  if (ret == NULL)
+  {
+    LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "malloc");
+    GNUNET_abort ();
+  }
+#ifdef W32_MEM_LIMIT
+  *((size_t *) ret) = size;
+  ret = &((size_t *) ret)[1];
+  mem_used += size;
+#endif
+  memcpy (ret, buf, size);
+  return ret;
+}
+
+
+
+/**
+ * Wrapper around malloc. Allocates size bytes of memory.
+ * The memory will be zero'ed out.
+ *
+ * @param size the number of bytes to allocate
+ * @param filename where in the code was the call to GNUNET_malloc_large
+ * @param linenumber where in the code was the call to GNUNET_malloc_large
+ * @return pointer to size bytes of memory, NULL if we do not have enough memory
+ */
+void *
+GNUNET_xmalloc_unchecked_ (size_t size, const char *filename, int linenumber)
+{
+  void *result;
+
+#ifdef W32_MEM_LIMIT
+  size += sizeof (size_t);
+  if (mem_used + size > W32_MEM_LIMIT)
+    return NULL;
+#endif
+
+  result = malloc (size);
+  if (result == NULL)
+    return NULL;
+  memset (result, 0, size);
+
+#ifdef W32_MEM_LIMIT
+  *((size_t *) result) = size;
+  result = &((size_t *) result)[1];
+  mem_used += size;
+#endif
+
+  return result;
+}
+
+
+/**
+ * Reallocate memory. Checks the return value, aborts if no more
+ * memory is available.
+ *
+ * @param ptr the pointer to reallocate
+ * @param n how many bytes of memory to allocate
+ * @param filename where in the code was the call to GNUNET_realloc
+ * @param linenumber where in the code was the call to GNUNET_realloc
+ * @return pointer to size bytes of memory
+ */
+void *
+GNUNET_xrealloc_ (void *ptr, size_t n, const char *filename, int linenumber)
+{
+#ifdef W32_MEM_LIMIT
+  n += sizeof (size_t);
+  ptr = &((size_t *) ptr)[-1];
+  mem_used = mem_used - *((size_t *) ptr) + n;
+#endif
+  ptr = realloc (ptr, n);
+  if ((NULL == ptr) && (n > 0))
+  {
+    LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "realloc");
+    GNUNET_abort ();
+  }
+#ifdef W32_MEM_LIMIT
+  ptr = &((size_t *) ptr)[1];
+#endif
+  return ptr;
+}
+
+
+/**
+ * Free memory. Merely a wrapper for the case that we
+ * want to keep track of allocations.
+ *
+ * @param ptr the pointer to free
+ * @param filename where in the code was the call to GNUNET_array_grow
+ * @param linenumber where in the code was the call to GNUNET_array_grow
+ */
+void
+GNUNET_xfree_ (void *ptr, const char *filename, int linenumber)
+{
+  GNUNET_assert_at (ptr != NULL, filename, linenumber);
+#ifdef W32_MEM_LIMIT
+  ptr = &((size_t *) ptr)[-1];
+  mem_used -= *((size_t *) ptr);
+#endif
+  free (ptr);
+}
+
+/**
+ * Dup a string (same semantics as strdup).
+ *
+ * @param str the string to dup
+ * @param filename where in the code was the call to GNUNET_strdup
+ * @param linenumber where in the code was the call to GNUNET_strdup
+ * @return strdup(str)
+ */
+char *
+GNUNET_xstrdup_ (const char *str, const char *filename, int linenumber)
+{
+  char *res;
+
+  GNUNET_assert_at (str != NULL, filename, linenumber);
+  res = GNUNET_xmalloc_ (strlen (str) + 1, filename, linenumber);
+  memcpy (res, str, strlen (str) + 1);
+  return res;
+}
+
+
+/**
+ * Dup partially a string (same semantics as strndup).
+ *
+ * @param str the string to dup
+ * @param len the length of the string to dup
+ * @param filename where in the code was the call to GNUNET_strndup
+ * @param linenumber where in the code was the call to GNUNET_strndup
+ * @return strndup(str,len)
+ */
+char *
+GNUNET_xstrndup_ (const char *str, size_t len, const char *filename,
+                  int linenumber)
+{
+  char *res;
+
+  GNUNET_assert_at (str != NULL, filename, linenumber);
+  len = GNUNET_MIN (len, strlen (str));
+  res = GNUNET_xmalloc_ (len + 1, filename, linenumber);
+  memcpy (res, str, len);
+  res[len] = '\0';
+  return res;
+}
+
+
+/**
+ * Grow an array.  Grows old by (*oldCount-newCount)*elementSize bytes
+ * and sets *oldCount to newCount.
+ *
+ * @param old address of the pointer to the array
+ *        *old may be NULL
+ * @param elementSize the size of the elements of the array
+ * @param oldCount address of the number of elements in the *old array
+ * @param newCount number of elements in the new array, may be 0
+ * @param filename where in the code was the call to GNUNET_array_grow
+ * @param linenumber where in the code was the call to GNUNET_array_grow
+ */
+void
+GNUNET_xgrow_ (void **old, size_t elementSize, unsigned int *oldCount,
+               unsigned int newCount, const char *filename, int linenumber)
+{
+  void *tmp;
+  size_t size;
+
+  GNUNET_assert_at (INT_MAX / elementSize > newCount, filename, linenumber);
+  size = newCount * elementSize;
+  if (size == 0)
+  {
+    tmp = NULL;
+  }
+  else
+  {
+    tmp = GNUNET_xmalloc_ (size, filename, linenumber);
+    memset (tmp, 0, size);      /* client code should not rely on this, though... */
+    if (*oldCount > newCount)
+      *oldCount = newCount;     /* shrink is also allowed! */
+    memcpy (tmp, *old, elementSize * (*oldCount));
+  }
+
+  if (*old != NULL)
+  {
+    GNUNET_xfree_ (*old, filename, linenumber);
+  }
+  *old = tmp;
+  *oldCount = newCount;
+}
+
+
+/**
+ * Like asprintf, just portable.
+ *
+ * @param buf set to a buffer of sufficient size (allocated, caller must free)
+ * @param format format string (see printf, fprintf, etc.)
+ * @param ... data for format string
+ * @return number of bytes in "*buf" excluding 0-termination
+ */
+int
+GNUNET_asprintf (char **buf, const char *format, ...)
+{
+  int ret;
+  va_list args;
+
+  va_start (args, format);
+  ret = VSNPRINTF (NULL, 0, format, args);
+  va_end (args);
+  *buf = GNUNET_malloc (ret + 1);
+  va_start (args, format);
+  ret = VSPRINTF (*buf, format, args);
+  va_end (args);
+  return ret;
+}
+
+
+/**
+ * Like snprintf, just aborts if the buffer is of insufficient size.
+ *
+ * @param buf pointer to buffer that is written to
+ * @param size number of bytes in buf
+ * @param format format strings
+ * @param ... data for format string
+ * @return number of bytes written to buf or negative value on error
+ */
+int
+GNUNET_snprintf (char *buf, size_t size, const char *format, ...)
+{
+  int ret;
+  va_list args;
+
+  va_start (args, format);
+  ret = VSNPRINTF (buf, size, format, args);
+  va_end (args);
+  GNUNET_assert (ret <= size);
+  return ret;
+}
+
+
+/**
+ * Create a copy of the given message.
+ *
+ * @param msg message to copy
+ * @return duplicate of the message
+ */
+struct GNUNET_MessageHeader *
+GNUNET_copy_message (const struct GNUNET_MessageHeader *msg)
+{
+  struct GNUNET_MessageHeader *ret;
+  uint16_t msize;
+
+  msize = ntohs (msg->size);
+  GNUNET_assert (msize >= sizeof (struct GNUNET_MessageHeader));
+  ret = GNUNET_malloc (msize);
+  memcpy (ret, msg, msize);
+  return ret;
+}
+
+
+/* end of common_allocation.c */