silc_srealloc now allocates new block if reallocation fails.

[crypto.git] / lib / silcutil / silcmemory.c

diff --git a/lib/silcutil/silcmemory.c b/lib/silcutil/silcmemory.c
index eb246557b7b99e2c2a58af70d8d65b53bfe45198..b1a657b2f335593c91bba82875d9e2ea1d8fb8f6 100644 (file)
--- a/lib/silcutil/silcmemory.c
+++ b/lib/silcutil/silcmemory.c
@@ -1,10 +1,10 @@
 /*
 
-  silcmemory.c 
+  silcmemory.c
 
   Author: Pekka Riikonen <priikone@silcnet.org>
 
-  Copyright (C) 1999 - 2002 Pekka Riikonen
+  Copyright (C) 1999 - 2008 Pekka Riikonen
 
   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -18,29 +18,68 @@
 */
 /* $Id$ */
 
-#include "silcincludes.h"
+#include "silc.h"
+
+#ifndef SILC_STACKTRACE
+
+#define SILC_MAX_ALLOC (1024 * 1024L * 1024L)
 
 void *silc_malloc(size_t size)
 {
   void *addr;
+
+  if (silc_unlikely(size <= 0 || size >= SILC_MAX_ALLOC)) {
+    if (size == 0)
+      silc_set_errno_nofail(SILC_ERR_ZERO_ALLOCATION);
+    else
+      silc_set_errno_reason_nofail(SILC_ERR_TOO_LARGE_ALLOCATION,
+                                  "Allocation by %d", size);
+    return NULL;
+  }
+
   addr = malloc(size);
-  assert(addr != NULL);
+  if (silc_unlikely(!addr))
+    silc_set_errno_nofail(SILC_ERR_OUT_OF_MEMORY);
+
   return addr;
 }
 
 void *silc_calloc(size_t items, size_t size)
 {
   void *addr;
+
+  if (silc_unlikely(size * items <= 0 || size * items >= SILC_MAX_ALLOC)) {
+    if (size == 0)
+      silc_set_errno_nofail(SILC_ERR_ZERO_ALLOCATION);
+    else
+      silc_set_errno_reason_nofail(SILC_ERR_TOO_LARGE_ALLOCATION,
+                                  "Allocation by %d", size);
+    return NULL;
+  }
+
   addr = calloc(items, size);
-  assert(addr != NULL);
+  if (silc_unlikely(!addr))
+    silc_set_errno_nofail(SILC_ERR_OUT_OF_MEMORY);
+
   return addr;
 }
 
 void *silc_realloc(void *ptr, size_t size)
 {
   void *addr;
+  if (silc_unlikely(size <= 0 || size >= SILC_MAX_ALLOC)) {
+    if (size == 0)
+      silc_set_errno_nofail(SILC_ERR_ZERO_ALLOCATION);
+    else
+      silc_set_errno_reason_nofail(SILC_ERR_TOO_LARGE_ALLOCATION,
+                                  "Allocation by %d", size);
+    return NULL;
+  }
+
   addr = realloc(ptr, size);
-  assert(addr != NULL);
+  if (silc_unlikely(!addr))
+    silc_set_errno_nofail(SILC_ERR_OUT_OF_MEMORY);
+
   return addr;
 }
 
@@ -51,9 +90,104 @@ void silc_free(void *ptr)
 
 void *silc_memdup(const void *ptr, size_t size)
 {
-  unsigned char *addr = silc_malloc(size + 1);
-  assert(addr != NULL);
+  unsigned char *addr;
+
+  addr = silc_malloc(size + 1);
+  if (silc_unlikely(!addr)) {
+    silc_set_errno_nofail(SILC_ERR_OUT_OF_MEMORY);
+    return NULL;
+  }
   memcpy((void *)addr, ptr, size);
   addr[size] = '\0';
   return (void *)addr;
 }
+
+char *silc_strdup(const char *str)
+{
+  return silc_memdup(str, strlen(str));
+}
+
+#endif /* !SILC_STACKTRACE */
+
+/* SilcStack aware routines */
+
+void *silc_smalloc(SilcStack stack, SilcUInt32 size)
+{
+  return stack ? silc_stack_malloc(stack, size) : silc_malloc(size);
+}
+
+void silc_sfree(SilcStack stack, void *ptr)
+{
+  if (stack) {
+#ifdef SILC_DEBUG
+    if (ptr)
+      *(unsigned char *)ptr = 'F';
+#endif /* SILC_DEBUG */
+    return;
+  }
+  silc_free(ptr);
+}
+
+void *silc_scalloc(SilcStack stack, SilcUInt32 items, SilcUInt32 size)
+{
+  unsigned char *addr;
+
+  if (!stack)
+    return silc_calloc(items, size);
+
+  addr = silc_stack_malloc(stack, items * size);
+  if (silc_unlikely(!addr))
+    return NULL;
+  memset(addr, 0, items * size);
+  return (void *)addr;
+}
+
+void *silc_srealloc(SilcStack stack, SilcUInt32 old_size,
+                   void *ptr, SilcUInt32 size)
+{
+  void *new_ptr;
+
+  if (!stack)
+    return silc_realloc(ptr, size);
+
+  new_ptr = silc_stack_realloc(stack, old_size, ptr, size);
+  if (!new_ptr) {
+    new_ptr = silc_smalloc(stack, size);
+    if (!new_ptr)
+      return NULL;
+    memcpy(new_ptr, ptr, old_size);
+  }
+
+  return new_ptr;
+}
+
+void *silc_smemdup(SilcStack stack, const void *ptr, SilcUInt32 size)
+{
+  unsigned char *addr;
+
+  if (!stack)
+    return silc_memdup(ptr, size);
+
+  addr = silc_stack_malloc(stack, size + 1);
+  if (silc_unlikely(!addr))
+    return NULL;
+  memcpy((void *)addr, ptr, size);
+  addr[size] = '\0';
+  return (void *)addr;
+}
+
+char *silc_sstrdup(SilcStack stack, const char *str)
+{
+  SilcInt32 size = strlen(str);
+  char *addr;
+
+  if (!stack)
+    return silc_memdup(str, size);
+
+  addr = silc_stack_malloc(stack, size + 1);
+  if (silc_unlikely(!addr))
+    return NULL;
+  memcpy((void *)addr, str, size);
+  addr[size] = '\0';
+  return addr;
+}