[U-Boot] [PATCH 1/6] lib: add u16_strcpy/strdup functions

[AKASHI Takahiro <takahiro.akashi@linaro.org>]

On Thu, Nov 01, 2018 at 07:10:59AM +0100, Heinrich Schuchardt wrote:
> On 11/01/2018 05:45 AM, AKASHI Takahiro wrote:
> > From: "Akashi Takahiro" <takahiro.akashi@linaro.org>
> > 
> > Add u16_strcpy() and u16_strdup(). The latter function will be
> > used later in implementing efi HII database protocol.
> > 
> > Signed-off-by: Akashi Takahiro <takahiro.akashi@linaro.org>
> > ---
> >  include/charset.h | 18 ++++++++++++++++++
> >  lib/charset.c     | 29 +++++++++++++++++++++++++++++
> >  2 files changed, 47 insertions(+)
> > 
> > diff --git a/include/charset.h b/include/charset.h
> > index 4d45e246e515..5807f02b1a04 100644
> > --- a/include/charset.h
> > +++ b/include/charset.h
> > @@ -191,6 +191,24 @@ size_t u16_strlen(const u16 *in);
> >   */
> >  size_t u16_strnlen(const u16 *in, size_t count);
> >  
> > +/* TODO: add descriptions */
> 
> You could use the descriptions below.

Thanks. Actually I forgot to delete this line :)
I will take your description anyway.

-Takahiro Akashi

> > +/**
> > + * u16_strcpy() - copy u16 string
> 
> Copy u16 string pointed to by src, including terminating null word, to
> the buffer pointed to by dest.
> 
> > + *
> > + * @dest:		destination buffer
> > + * @src:		source buffer (null terminated)
> > + * Return:		'dest' address
> > + */
> > +u16 *u16_strcpy(u16 *dest, const u16 *src);
> > +
> > +/**
> > + * u16_strdup() - duplicate u16 string
> 
> Copy u16 string pointed to by src, including terminating null word, to a
> newly allocated buffer.
> 
> > + *
> > + * @src:		source buffer (null terminated)
> > + * Return:		allocated new buffer on success, NULL on failure
> > + */
> > +u16 *u16_strdup(const u16 *src);
> > +
> >  /**
> >   * utf16_to_utf8() - Convert an utf16 string to utf8
> >   *
> > diff --git a/lib/charset.c b/lib/charset.c
> > index 10557b9e753d..5e349ed5ee45 100644
> > --- a/lib/charset.c
> > +++ b/lib/charset.c
> > @@ -349,6 +349,35 @@ size_t u16_strnlen(const u16 *in, size_t count)
> >  	return i;
> >  }
> >  
> > +u16 *u16_strcpy(u16 *dest, const u16 *src)
> > +{
> > +	u16 *tmp = dest;
> > +
> > +	for (;; dest++, src++) {
> > +		*dest = *src;
> > +		if (!*src)
> > +			break;
> > +	}
> > +
> > +	return tmp;
> > +}
> > +
> > +u16 *u16_strdup(const u16 *src)
> > +{
> > +	u16 *new;
> > +
> > +	if (!src)
> > +		return NULL;
> > +
> > +	new = malloc((u16_strlen(src) + 1) * sizeof(u16));
> > +	if (!new)
> > +		return NULL;
> > +
> > +	u16_strcpy(new, src);
> > +
> > +	return new;
> > +}
> > +
> >  /* Convert UTF-16 to UTF-8.  */
> >  uint8_t *utf16_to_utf8(uint8_t *dest, const uint16_t *src, size_t size)
> >  {
> > 
> 
> For everything I added to charset.c I implemented tests in
> test/unicode_ut.c.
> 
> Reviewed-by: Heinrich Schuchardt <xypron.glpk@gmx.de>