From 1de5fc1419add86884df97580d7a2e745ad43bff Mon Sep 17 00:00:00 2001
From: Simon Warta <simon@warta.it>
Date: Mon, 29 Jun 2015 14:02:37 +0200
Subject: More changes for use with debug STL

---
 src/lib/alloc/secmem.h | 25 ++++++++++++++++++++-----
 1 file changed, 20 insertions(+), 5 deletions(-)

(limited to 'src/lib/alloc')

diff --git a/src/lib/alloc/secmem.h b/src/lib/alloc/secmem.h
index b583aa812..98707ad4e 100644
--- a/src/lib/alloc/secmem.h
+++ b/src/lib/alloc/secmem.h
@@ -108,7 +108,10 @@ size_t buffer_insert(std::vector<T, Alloc>& buf,
                      size_t input_length)
    {
    const size_t to_copy = std::min(input_length, buf.size() - buf_offset);
-   copy_mem(&buf[buf_offset], input, to_copy);
+   if (to_copy > 0)
+      {
+      copy_mem(&buf[buf_offset], input, to_copy);
+      }
    return to_copy;
    }
 
@@ -118,7 +121,10 @@ size_t buffer_insert(std::vector<T, Alloc>& buf,
                      const std::vector<T, Alloc2>& input)
    {
    const size_t to_copy = std::min(input.size(), buf.size() - buf_offset);
-   copy_mem(&buf[buf_offset], input.data(), to_copy);
+   if (to_copy > 0)
+      {
+      copy_mem(&buf[buf_offset], input.data(), to_copy);
+      }
    return to_copy;
    }
 
@@ -129,7 +135,10 @@ operator+=(std::vector<T, Alloc>& out,
    {
    const size_t copy_offset = out.size();
    out.resize(out.size() + in.size());
-   copy_mem(&out[copy_offset], in.data(), in.size());
+   if (in.size() > 0)
+      {
+      copy_mem(&out[copy_offset], in.data(), in.size());
+      }
    return out;
    }
 
@@ -146,7 +155,10 @@ std::vector<T, Alloc>& operator+=(std::vector<T, Alloc>& out,
    {
    const size_t copy_offset = out.size();
    out.resize(out.size() + in.second);
-   copy_mem(&out[copy_offset], in.first, in.second);
+   if (in.second > 0)
+      {
+      copy_mem(&out[copy_offset], in.first, in.second);
+      }
    return out;
    }
 
@@ -156,7 +168,10 @@ std::vector<T, Alloc>& operator+=(std::vector<T, Alloc>& out,
    {
    const size_t copy_offset = out.size();
    out.resize(out.size() + in.second);
-   copy_mem(&out[copy_offset], in.first, in.second);
+   if (in.second > 0)
+      {
+      copy_mem(&out[copy_offset], in.first, in.second);
+      }
    return out;
    }
 
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