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The Weird and The Wonderful

   

The Weird and The Wonderful forum is a place to post Coding Horrors, Worst Practices, and the occasional flash of brilliance.

We all come across code that simply boggles the mind. Lazy kludges, embarrassing mistakes, horrid workarounds and developers just not quite getting it. And then somedays we come across - or write - the truly sublime.

Post your Best, your worst, and your most interesting. But please - no programming questions . This forum is purely for amusement and discussions on code snippets. All actual programming questions will be removed.

 
GeneralCSS & Sophocles, more related than you know Pin
raddevus22-Jul-24 12:22
mvaraddevus22-Jul-24 12:22 
GeneralRe: CSS & Sophocles, more related than you know Pin
Jeremy Falcon22-Jul-24 14:19
professionalJeremy Falcon22-Jul-24 14:19 
GeneralRe: CSS & Sophocles, more related than you know Pin
raddevus22hrs 58mins ago
mvaraddevus22hrs 58mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
Jeremy Falcon18hrs 55mins ago
professionalJeremy Falcon18hrs 55mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
Jeremy Falcon18hrs 40mins ago
professionalJeremy Falcon18hrs 40mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
raddevus18hrs 26mins ago
mvaraddevus18hrs 26mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
Jeremy Falcon16hrs 29mins ago
professionalJeremy Falcon16hrs 29mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
RickZeeland22-Jul-24 19:13
mveRickZeeland22-Jul-24 19:13 
AnswerRe: CSS & Sophocles, more related than you know Pin
raddevus22hrs 59mins ago
mvaraddevus22hrs 59mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
Jeremy Falcon18hrs 52mins ago
professionalJeremy Falcon18hrs 52mins ago 
JokeRe: CSS & Sophocles, more related than you know Pin
Peter_in_278022-Jul-24 20:27
professionalPeter_in_278022-Jul-24 20:27 
GeneralRe: CSS & Sophocles, more related than you know Pin
TNCaver15hrs 20mins ago
TNCaver15hrs 20mins ago 
GeneralRe: CSS & Sophocles, more related than you know Pin
Richard Deeming4hrs 17mins ago
mveRichard Deeming4hrs 17mins ago 
GeneralLinux C PreProcessor: Who Knew? Pin
raddevus4-Jul-24 6:26
mvaraddevus4-Jul-24 6:26 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
trønderen4-Jul-24 8:22
trønderen4-Jul-24 8:22 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
Jalapeno Bob4-Jul-24 9:46
professionalJalapeno Bob4-Jul-24 9:46 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
raddevus4-Jul-24 10:14
mvaraddevus4-Jul-24 10:14 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
Dave Kreskowiak4-Jul-24 9:37
mveDave Kreskowiak4-Jul-24 9:37 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
raddevus4-Jul-24 10:16
mvaraddevus4-Jul-24 10:16 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
k50549-Jul-24 3:51
mvek50549-Jul-24 3:51 
GeneralRe: Linux C PreProcessor: Who Knew? Pin
raddevus9-Jul-24 4:51
mvaraddevus9-Jul-24 4:51 
GeneralDoes this scare anyone else? Pin
honey the codewitch4-Jul-24 0:44
mvahoney the codewitch4-Jul-24 0:44 
GeneralRe: Does this scare anyone else? Pin
Peter_in_27804-Jul-24 11:33
professionalPeter_in_27804-Jul-24 11:33 
GeneralRe: Does this scare anyone else? Pin
honey the codewitch4-Jul-24 11:35
mvahoney the codewitch4-Jul-24 11:35 
GeneralWhat the hell GCC, again Pin
k50542-Jul-24 11:32
mvek50542-Jul-24 11:32 
Given
C
#include <string.h>

void swap(char foo[10][20], int i1, int i2)
{
    if(i1 != i2)
    {
        char buff[20];
        strcpy(buff, foo[i1]);
        strcpy(foo[i1], foo[i2]);
        strcpy(foo[i2], buff);
    }
}
when compiling with any optimization level above -O0, gcc complains about the second strcpy, saying
warning: ‘strcpy’ accessing 1 byte at offsets [-4611686018427387904, 4611686018427387903] and [-4611686018427387904, 4611686018427387903] overlaps 1 byte at offset [-4611686018427387904, 199] [-Wrestrict]
clang doesn't complain, even at -O3. I think what gcc is trying to tell me is that there is an issue when i1 == i2, even though there's a test to not swap if i1 == i2! If I replace i1, i2 with integer values (eg. 1, 2) the warning goes away! Weird.
So far, the only way I've found to stop gcc from issuing a warning is to use memcpy instead of strcpy. Though both have restrict qualifiers to both arguments.
Or maybe I'm missing something?
"A little song, a little dance, a little seltzer down your pants"
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