Move vsprintf functions into their own header

common.h is very large, so before changing the vsprintf functions, move the
prototypes into their own header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Add safe vsnprintf and snprintf library functions

From: Sonny Rao <sonnyrao@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@chromium.org> modified this commit a little)

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
vsprintf: Move function documentation into header file

Now that this is not in common.h, perhaps it is acceptable to move this
documentation into the header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
Make printf and vprintf safe from buffer overruns

From: Sonny Rao <sonnyrao@chromium.org>

utilize the added vscnprintf functions to avoid buffer overruns
The implementation is fairly dumb in that it doesn't detect
that the buffer is too small, but at least will not cause crashes.

Signed-off-by: Sonny Rao <sonnyrao@chromium.org>
cmd_sf.c: fix printf() length modifier

size_t is not always 'unsigned int', use corret length modifer.

This patch fixes following warning:

---8<---
cmd_sf.c: In function 'spi_flash_update_block':
cmd_sf.c:130: warning: format '%#x' expects type 'unsigend int', but argument 4 has type 'size_t'
cmd_sf.c:135: warning: format '%x' expects type 'unsigned int', but argument 3 has type 'size_t'
--->8---

Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
cc: Mike Frysinger <vapier@gentoo.org>
cc: Thomas Chou <thomas@wytron.com.tw>
Acked-by: Mike Frysinger <vapier@gentoo.org>
fat.c: fix printf() length modifier

The DIRENTSPERBLOCK utilizes sizeof() which will return a size_t which has no
fixed size. Therefor use correct length modifer for printf() statement to
prevent compiler warnings.

This patch fixes following warning:

---8<---
fat.c: In function 'do_fat_read':
fat.c:879: warning: format '%d' expects type 'int', but argument 4 has type 'long unsigned int'
--->8---

Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
cc: Mike Frysinger <vapier@gentoo.org>
cc: Thomas Chou <thomas@wytron.com.tw>
cc: rjones@nexus-tech.net
cc: kharris@nexus-tech.net
Acked-by: Mike Frysinger <vapier@gentoo.org>
avr32:mmu.c: fix printf() length modifier

avr32 uses unsigned long addresses, fix the printf() length modifier for that
fact.

Before this patch following warning occours:

---8<---
mmu.c: In function 'mmu_init_r':
mmu.c:25: warning: format '%08x' expects type 'unsigned int', but argument 2 has type 'uintptr_t'
--->8---

Signed-off-by: Andreas Bießmann <biessmann@corscience.de>
cc: Mike Frysinger <vapier@gentoo.org>
cc: Thomas Chou <thomas@wytron.com.tw>
cc: Reinhard Meyer <u-boot@emk-elektronik.de>
Acked-by: Mike Frysinger <vapier@gentoo.org>
CHECKPATCH: ./board/dave/PPChameleonEVB/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/cpciiser4/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/du405/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/canbt/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/cpci405/fpgadata_cpci4052.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/cpci405/fpgadata_cpci405ab.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/cpci405/fpgadata_cpci405.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/wuh405/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/plu405/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/ar405/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/ar405/fpgadata_xl30.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/dasa_sim/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>
CHECKPATCH: ./board/esd/ash405/fpgadata.c

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
Cc: Anatolij Gustschin <agust@denx.de>
Cc: Stefano Babic <sbabic@denx.de>
Acked-by: Anatolij Gustschin <agust@denx.de>