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[kservice] Update the rt_strnlen function.

This commit is contained in:
armink 2019-03-09 15:46:56 +08:00
parent 7f3f8d8352
commit b2c338970f
2 changed files with 5 additions and 1 deletions
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1
include/rtthread.h
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@ -516,6 +516,7 @@ void *rt_memcpy(void *dest, const void *src, rt_ubase_t n);
rt_int32_t rt_strncmp(const char *cs, const char *ct, rt_ubase_t count);
rt_int32_t rt_strcmp(const char *cs, const char *ct);
rt_size_t rt_strlen(const char *src);
rt_size_t rt_strnlen(const char *s, rt_ubase_t maxlen);
char *rt_strdup(const char *s);
#if defined(__CC_ARM) || defined(__CLANG_ARM)
/* leak strdup interface */

5
src/kservice.c
View File

@ -461,6 +461,7 @@ rt_int32_t rt_strcmp(const char *cs, const char *ct)
return (*cs - *ct);
}
RTM_EXPORT(rt_strcmp);
/**
* The strnlen() function returns the number of characters in the
* string pointed to by s, excluding the terminating null byte ('\0'),
@ -476,11 +477,13 @@ rt_size_t rt_strnlen(const char *s, rt_ubase_t maxlen)
{
const char *sc;
for (sc = s; *sc != '\0' && sc - s < (int)maxlen; ++sc) /* nothing */
for (sc = s; *sc != '\0' && (rt_ubase_t)(sc - s) < maxlen; ++sc) /* nothing */
;
return sc - s;
}
RTM_EXPORT(rt_strnlen);
/**
* This function will return the length of a string, which terminate will
* null character.