[U-Boot] [PATCH v6 2/4] Add safe vsnprintf and snprintf library functions

[Wolfgang Denk]

Dear Simon Glass,

In message <1320263530-22843-3-git-send-email-sjg at chromium.org> you wrote:
> From: Sonny Rao <sonnyrao at chromium.org>
> 
> From: Sonny Rao <sonnyrao at chromium.org>
> 
> These functions are useful in U-Boot because they allow a graceful failure
> rather than an unpredictable stack overflow when printf() buffers are
> exceeded.
> 
> Mostly copied from the Linux kernel. I copied vscnprintf and
> scnprintf so we can change printf and vprintf to use the safe
> implementation but still return the correct values.
> 
> (Simon Glass <sjg at chromium.org> modified this commit a little)
> 
> Signed-off-by: Sonny Rao <sonnyrao at chromium.org>
> ---
> Changes in v3:
> - Add CONFIG_SYS_VSNPRINT option to enable vsnprintf() functions
> - Update README with CONFIG_SYS_VSNPRINT docs
> - Use ADDCH macro to support checking/not checking end pointer
> 
> Changes in v4:
> - Add these changes in unless CONFIG_NO_SYS_VSNPRINT is defined
> - Reduce code size overhead if disabled to only 4 bytes on ARM
> - Remove the ugly #ifdef patch from series since it only saves 4 bytes
> 
> Changes in v5:
> - Define INT_MAX locally within vsprintf.c
> 
> Changes in v6:
> - Change the config option to CONFIG_SYS_VSNPRINTF
> - Make the default be to NOT include safe printf functions
> 
>  README             |    9 ++
>  include/vsprintf.h |   19 ++++
>  lib/vsprintf.c     |  265 +++++++++++++++++++++++++++++++++++++++++----------
>  3 files changed, 241 insertions(+), 52 deletions(-)

Applied to "next" branch, thanks.

Best regards,

Wolfgang Denk

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