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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>
54 lines
1.1 KiB
C
54 lines
1.1 KiB
C
/*
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* linux/lib/string.c
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifdef USE_HOSTCC
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#include <stdio.h>
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#endif
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#include <linux/ctype.h>
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#include <linux/string.h>
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/**
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* skip_spaces - Removes leading whitespace from @str.
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* @str: The string to be stripped.
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*
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* Returns a pointer to the first non-whitespace character in @str.
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*/
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char *skip_spaces(const char *str)
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{
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while (isspace(*str))
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++str;
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return (char *)str;
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}
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/**
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* strim - Removes leading and trailing whitespace from @s.
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* @s: The string to be stripped.
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*
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* Note that the first trailing whitespace is replaced with a %NUL-terminator
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* in the given string @s. Returns a pointer to the first non-whitespace
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* character in @s.
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*
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* Note that if the string consist of only spaces, then the terminator is placed
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* at the start of the string, with the return value pointing there also.
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*/
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char *strim(char *s)
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{
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size_t size;
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char *end;
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size = strlen(s);
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if (!size)
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return s;
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end = s + size - 1;
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while (end >= s && isspace(*end))
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end--;
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*(end + 1) = '\0';
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return skip_spaces(s);
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}
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