Function MakeKey

storage/connect/jsonudf.cpp:1800–1843

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

/*  Make a valid key from the passed argument.                                   */
/*********************************************************************************/
static PCSZ MakeKey(PGLOBAL g, 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 (IsJson(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 (PCSZ) "Key";

			if (!b) {
				if ((p = (PSZ)PlgDBSubAlloc(g, NULL, n + 1))) {
					memcpy(p, s, n);
					p[n] = 0;
				} else
					PUSH_WARNING(g->Message);

				s = p;
			} // endif b

		} // endif s

		return s;
	} // endif count

  return (PCSZ) "Key";
} // end of MakeKey

/*********************************************************************************/
/*  Parse a json file.                                                 */