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add a_strncat()

This commit is contained in:
Julien Danjou 2008-01-07 15:48:04 +01:00
parent 079569e6b4
commit fb07026639
1 changed files with 19 additions and 0 deletions
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19
util.h
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@ -197,6 +197,25 @@ static inline ssize_t a_strcat(char *dst, ssize_t n, const char *src)
return dlen + a_strcpy(dst + dlen, n - dlen, src);
}
/** \brief safe strncat.
*
* The m_strncat() function appends at most \c n chars from the string \c src
* at the end of the buffer \c dst if space is available.
*
* \param[in] dst destination buffer.
* \param[in] n size of the buffer, Negative sizes are allowed.
* \param[in] src the string to append.
* \param[in] l maximum number of chars of src to consider.
* \return the smallest value between <tt>m_strlen(dst) + m_strlen(src)</tt>
* and <tt>m_strlen(dst) + l</tt>
*/
static inline ssize_t
a_strncat(char *dst, ssize_t n, const char *src, ssize_t l)
{
ssize_t dlen = a_strnlen(dst, n - 1);
return dlen + a_strncpy(dst + dlen, n - dlen, src, l);
}
void die(const char *, ...) __attribute__ ((noreturn)) __attribute__ ((format(printf, 1, 2)));
void eprint(const char *, ...) __attribute__ ((noreturn)) __attribute__ ((format(printf, 1, 2)));
double compute_new_value_from_arg(const char *, double);