void base64_encode(char *dst, const unsigned char *src, int len) { static const char b64[] = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9', '+', '/' };

for (int i = 0; i < len; i += 3, dst += 4) {
	unsigned long x = (src[i] & 0xfful) << 16;
	dst[3] = i + 2 >= len ? '=' : b64[(x |= src[i + 2] & 0xfful) & 0x3f];
	dst[2] = i + 1 >= len ? '=' : b64[(x |= (src[i + 1] & 0xfful) << 8) >> 6 & 0x3f];
	dst[1] = b64[x >> 12 & 0x3f];
	dst[0] = b64[x >> 18];
}
*dst = '\0';

}

int base64_decode(unsigned char *dst, const char *src) { static const char b64[] = { ['A'] = 0, ['B'] = 1, ['C'] = 2, ['D'] = 3, ['E'] = 4, ['F'] = 5, ['G'] = 6, ['H'] = 7, ['I'] = 8, ['J'] = 9, ['K'] = 10, ['L'] = 11, ['M'] = 12, ['N'] = 13, ['O'] = 14, ['P'] = 15, ['Q'] = 16, ['R'] = 17, ['S'] = 18, ['T'] = 19, ['U'] = 20, ['V'] = 21, ['W'] = 22, ['X'] = 23, ['Y'] = 24, ['Z'] = 25, ['a'] = 26, ['b'] = 27, ['c'] = 28, ['d'] = 29, ['e'] = 30, ['f'] = 31, ['g'] = 32, ['h'] = 33, ['i'] = 34, ['j'] = 35, ['k'] = 36, ['l'] = 37, ['m'] = 38, ['n'] = 39, ['o'] = 40, ['p'] = 41, ['q'] = 42, ['r'] = 43, ['s'] = 44, ['t'] = 45, ['u'] = 46, ['v'] = 47, ['w'] = 48, ['x'] = 49, ['y'] = 50, ['z'] = 51, ['0'] = 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, ['+'] = 62, ['/'] = 63, ['='] = 0, }; unsigned long x; int i, c, len, pad;

for (i = 0, x = 0, len = 0, pad = 0; src[i]; ++i) {
	c = src[i];
	if (c == '=' && (!src[i + 1] || (src[i + 1] == '=' && !src[i + 2])))
		++pad;
	else if (c >= sizeof(b64) || (!b64[c] && c != 'A'))
		return 0;
	x = x << 6 | b64[c];
	if (i % 4 == 3) {
		dst[len + 2] = x & 0xff, x >>= 8;
		dst[len + 1] = x & 0xff, x >>= 8;
		dst[len + 0] = x & 0xff;
		len += 3;
	}
}
if (i % 4 != 0)
	return 0;
return len - pad;

}

int main () {

char base64_src[100] = { 0 }; base64_src[0] = '9';
char base64_dst[100] = { 0 };
char base64_nop[100] = { 0 };
base64_encode(base64_dst, base64_src, 1);// run ok

base64_decode(base64_nop, base64_dst);// run erro

return 0;

}

-dhalf-assemble -fabi=ms -fdebug-stack-size=0 -fcmodel=large

If this parameter is added, the test examples that get the correct results in the previous compilation cannot get the correct results Has the work behind this parameter been completed?