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Re: [PATCH] inttostr.h: add compile-time buffer overrun checks

From: Paolo Bonzini
Subject: Re: [PATCH] inttostr.h: add compile-time buffer overrun checks
Date: Mon, 25 Oct 2010 12:09:51 +0200
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On 10/25/2010 03:40 AM, Paul Eggert wrote:
+/* Easier-to-use macros, which don't require a string buffer argument.
+   They can be used in code that assumes C99-style compound literals.
+   They return a pointer to storage with scope equal to that of the
+   enclosing block.  */
+#define int2str_call(t, func, n)                        \
+  func (n, ((char [INT_BUFSIZE_BOUND (t)]) {0,}))

Maybe this could use "func (n, alloca (INT_BUFSIZE_BOUND (t)))" if C99 is not in use? Alloca and VLA are not compatible, but if you are not using C99 then you are not using VLAs.


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