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strim: Sync up with Linux version

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Linux changed the behaviour of strim() so that a string with only spaces
reduces places the terminator at the start of the string, rather than
returning a pointer to the end of the string.

Bring in this version, from Linux v6.14

Add a comment about the new behaviour.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2025-05-01 05:10:08 -06:00
parent 4c26de2eea
commit aea684a0c3
1 changed files with 4 additions and 2 deletions
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6
lib/linux_string.c
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@ -31,13 +31,15 @@ char *skip_spaces(const char *str)
* Note that the first trailing whitespace is replaced with a %NUL-terminator
* in the given string @s. Returns a pointer to the first non-whitespace
* character in @s.
*
* Note that if the string consist of only spaces, then the terminator is placed
* at the start of the string, with the return value pointing there also.
*/
char *strim(char *s)
{
size_t size;
char *end;
s = skip_spaces(s);
size = strlen(s);
if (!size)
return s;
@ -47,5 +49,5 @@ char *strim(char *s)
end--;
*(end + 1) = '\0';
return s;
return skip_spaces(s);
}