u-boot.git/lib/string.c, branch v2021.07-rc2

lib: string: Implement strlcat

2021-04-12T21:44:55+00:00

This introduces strlcat, which provides a safer interface than strncat. It
never copies more than its size bytes, including the terminating nul. In
addition, it never reads past dest[size - 1], even if dest is not
nul-terminated.

This also removes the stub for dwc3 now that we have a proper
implementation.

Signed-off-by: Sean Anderson 
Reviewed-by: Simon Glass

lib: string: Fix strlcpy return value

2021-04-12T21:44:55+00:00

strlcpy should always return the number of bytes copied. We were
accidentally missing the nul-terminator. We also always used to return a
non-zero value, even if we did not actually copy anything.

Fixes: 23cd138503 ("Integrate USB gadget layer and USB CDC driver layer")

Signed-off-by: Sean Anderson

string: Use memcpy() within memmove() when we can

2021-01-16T19:49:09+00:00

A common use of memmove() can be handled by memcpy(). Also memcpy()
includes an optimization for large sizes: it copies a word at a time. So
we can get a speed-up by calling memcpy() to handle our move in this case.

Update memmove() to call also memcpy() if the source don't overlap
the destination (src + count <= dest).

Signed-off-by: Patrick Delaunay

string: Allow arch override of strndup() also

2020-02-06T02:33:46+00:00

At present architectures can override strdup() but not strndup(). Use
the same option for both.

Signed-off-by: Simon Glass

lib: Implement strndup()

2019-06-05T16:16:32+00:00

Signed-off-by: Thierry Reding 
Signed-off-by: Tom Warren

string: Include the config header

2018-11-21T02:14:22+00:00

At present the config header is not included in this file, but it does use
a CONFIG option. Fix it.

Signed-off-by: Simon Glass

string: Add strcspn()

2017-06-01T13:03:12+00:00

Add an implementation of strcspn() which returns the number of initial
characters that do not match any in a rejection list.

Signed-off-by: Simon Glass

string: Add strchrnul()

2017-06-01T13:03:12+00:00

This functions works like strchr() but returns the end of the string if
the character is not found. Add an implementation of this.

Signed-off-by: Simon Glass

string: Use memcpy() within memmove() when we can

2017-05-10T00:19:04+00:00

A common use of memmove() can be handled by memcpy(). Also memcpy()
includes an optimisation for large sizes: it copies a word at a time. So
we can get a speed-up by calling memcpy() to handle our move in this case.

Update memmove() to call memcpy() if the destination is before the source.

Signed-off-by: Simon Glass 
Reviewed-by: Tom Rini

string: Provide a slimmed-down memset()

2017-04-05T02:01:57+00:00

Most of the time the optimised memset() is what we want. For extreme
situations such as TPL it may be too large. For example on the 'rock'
board, using a simple loop saves a useful 48 bytes. With gcc 4.9 and
the rodata bug, this patch is enough to reduce the TPL image below the
limit.

Signed-off-by: Simon Glass 
Reviewed-by: Heiko Stuebner