Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>I just found another way to replace the <code>memcpy</code> function call. It only works with GCC(I still need to find another way for VC++) but I think it's definitely better than the crude <code>#define</code> way. It uses the <code>__REDIRECT</code> macro(in <code>sys/cdefs.h</code> included via <code>features.h</code>), which from what I've seen it's used extensively in the glibc. Below follows an example with a small test:</p> <pre><code>// modified.h #pragma once #ifndef MODIF_H_INCLUDED_ #define MODIF_H_INCLUDED_ #include &lt;cstddef&gt; #include &lt;features.h&gt; extern "C" { void test_memcpy(void* __restrict to, const void* __restrict from, size_t size); } #if defined(__GNUC__) void __REDIRECT(memcpy, (void* __restrict to, const void* __restrict from, size_t size), test_memcpy); #endif /* __GNUC__ */ #endif /* MODIF_H_INCLUDED_ */ //modified.cpp extern "C" void test_memcpy(void* __restrict to, const void* __restrict from, size_t size) { std::cout &lt;&lt; "Dumb memcpy replacement!\n"; } //original.h #pragma once #ifndef ORIG_H_INCLUDED_ #define ORIG_H_INCLUDED_ void test_with_orig(); #endif /* ORIG_H_INCLUDED_ */ //original.cpp #include &lt;cstring&gt; #include &lt;iostream&gt; void test_with_orig() { int* testDest = new int[10]; int* testSrc = new int[10]; for (unsigned int i = 0; i &lt; 10; ++i) { testSrc[i] = i; } memcpy(testDest, testSrc, 10 * sizeof(int)); for (unsigned int i = 0; i &lt; 10; ++i) { std::cout &lt;&lt; std::hex &lt;&lt; "\nAfter standard memcpy - " &lt;&lt; "Source: " &lt;&lt; testSrc[i] &lt;&lt; "\tDest: " &lt;&lt; testDest[i] &lt;&lt; "\n"; } } // and a small test #include "modified.h" #include "original.h" #include &lt;iostream&gt; #include &lt;cstring&gt; int main() { int* testDest = new int[10]; int* testSrc = new int[10]; for (unsigned int i = 0; i &lt; 10; ++i) { testSrc[i] = i; testDest[i] = 0xDEADBEEF; } memcpy(testDest, testSrc, 10 * sizeof(int)); for (unsigned int i = 0; i &lt; 10; ++i) { std::cout &lt;&lt; std::hex &lt;&lt; "\nAfter memcpy replacement - " &lt;&lt; "Source: " &lt;&lt; testSrc[i] &lt;&lt; "\tDest: " &lt;&lt; testDest[i] &lt;&lt; "\n"; } test_with_orig(); return 0; } </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POReplacing memcpy in a safe way
      singulars
      1. PTQuestion
    1. PTAnswer
    1. UScelavek
    1. UScelavek
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POReplacing memcpy in a safe way
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. This table or related slice is empty.
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload