Subject: Re: BUG in function parameter passing ??????
From: [email-masked] (Sam Holden)

28 Aug 1998 05:03:04 -0700
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[email-masked] writes:
>
>#include <stdio.h>
>#include <stdlib.h>
>#include <assert.h>
>#include <ctype.h>
>/*---------------------------------------------------------------------------*
>/
>  void strtolower(char *pText)
>  {
>    int i;
>    char *pPtr;
>    
>    assert(pText);
>    
>    for(i = 0, pPtr = pText; i < strlen(pText); i++, pPtr++)
>    {
>      *pPtr = tolower(*pPtr);
>    }
>  }
>/*---------------------------------------------------------------------*/
>
>int main(int argc, char *argv[])
>{
>  char pBuffer[132];
>  
>  /* why does this work? */
>  strcpy(pBuffer,"Hello You");
>  strtolower(pBuffer);
>  
>  /* but this gives a segmentation violation under Cygwin*/
>  strtolower("Hello You");
>  
>  printf("Success\n");
>  
>}

Which is expected since "Hello You" is a constant string and thus ends up in
memory which is read only...

Sam

---
There's no such thing as a simple cache bug.
	--Rob Pike
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