Method MakeKey

storage/connect/bsonudf.cpp:378–418

/ Make a valid key from the passed argument. */ /

/*  Make a valid key from the passed argument.                                   */
/*********************************************************************************/
PSZ BJNX::MakeKey(UDF_ARGS *args, int i)
{
	if (args->arg_count > (unsigned)i) {
		int     j = 0, n = args->attribute_lengths[i];
		my_bool b;  // true if attribute is zero terminated
		PSZ     p;
		PCSZ    s = args->attributes[i];

		if (s && *s && (n || *s == '\'')) {
			if ((b = (!n || !s[n])))
				n = strlen(s);

			if (IsArgJson(args, i))
				j = (int)(strchr(s, '_') - s + 1);

			if (j && n > j) {
				s += j;
				n -= j;
			} else if (*s == '\'' && s[n-1] == '\'') {
				s++;
				n -= 2;
				b = false;
			} // endif *s

			if (n < 1)
				return NewStr((PSZ)"Key");

			if (!b) {
				p = (PSZ)BsonSubAlloc(n + 1);
				memcpy(p, s, n);
				p[n] = 0;
				return p;
			} // endif b

		} // endif s

		return NewStr((PSZ)s);
	} // endif count

	return NewStr((PSZ)"Key");
} // end of MakeKey

/*********************************************************************************/
/*  MakeJson: Make the Json tree to serialize.                                   */