Function iscSafeConcatPath

src/common/isc.cpp:609–644

void iscSafeConcatPath(TEXT *resultString, const TEXT *appendString)
{
/**************************************
 *
 *	i s c S a f e C o n c a t P a t h
 *
 **************************************
 *
 * Functional description
 *	Safely appends appendString to resultString using paths rules.
 *  resultString must be at most MAXPATHLEN size.
 *	Thread/signal safe code.
 *
 **************************************/
	size_t len = strlen(resultString);
	fb_assert(len > 0);

	if (resultString[len - 1] != PathUtils::dir_sep && len < MAXPATHLEN - 1)
	{
		resultString[len++] = PathUtils::dir_sep;
		resultString[len] = 0;
	}

	size_t alen = strlen(appendString);
	if (len + alen > MAXPATHLEN - 1)
	{
		alen = MAXPATHLEN - 1 - len;
	}

	fb_assert(len < MAXPATHLEN);
	fb_assert(alen < MAXPATHLEN);
	fb_assert(len + alen < MAXPATHLEN);

	memcpy(&resultString[len], appendString, alen);
	resultString[len + alen] = 0;
}