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util: introduce xstrndup helper

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We already have xstrdup, add xstrndup as well to make it
straight-forward to clone part of a string.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
This commit is contained in:
Ahmad Fatoum 2020-10-25 10:41:18 +01:00 • committed by David Gibson
parent 4048aed12b
commit 651410e54c
2 changed files with 12 additions and 0 deletions
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util.h
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@ -61,6 +61,7 @@ static inline void *xrealloc(void *p, size_t len)
}
extern char *xstrdup(const char *s);
extern char *xstrndup(const char *s, size_t len);
extern int PRINTF(2, 3) xasprintf(char **strp, const char *fmt, ...);
extern int PRINTF(2, 3) xasprintf_append(char **strp, const char *fmt, ...);