static int s_iot_st_encode_varint_negative_uint32_t()

in source/serializer.c [22:51]

• 25 lines of code
• 5 McCabe index (conditional complexity)

static int s_iot_st_encode_varint_negative_uint32_t(struct aws_byte_buf *buffer, uint32_t n) {
    int byte_count = 0;
    // & 2's complement
    // ~0x7F == b-10000000
    while (n & ~0x7F) {
        AWS_RETURN_ERROR_IF2(
            // 0xFF == b11111111
            // 0x80 == b10000000
            aws_byte_buf_append_byte_dynamic_secure(buffer, (uint8_t)(n & 0xFF) | 0x80) == AWS_OP_SUCCESS,
            AWS_OP_ERR);
        n = n >> 7;
        byte_count += 1;
    }
    // Last Byte Math
    int count = 0;
    while (!(n & 0x80)) {
        n = n << 1;
        count += 1;
    }
    for (int i = 0; i < count; i++) {
        n = n >> 1;
        n = n | 0x80;
    }
    AWS_RETURN_ERROR_IF2(aws_byte_buf_append_byte_dynamic_secure(buffer, (uint8_t)n) == AWS_OP_SUCCESS, AWS_OP_ERR);
    for (int i = 0; i < 10 - byte_count - 2; i++) {
        AWS_RETURN_ERROR_IF2(aws_byte_buf_append_byte_dynamic_secure(buffer, 0xFF) == AWS_OP_SUCCESS, AWS_OP_ERR);
    }
    AWS_RETURN_ERROR_IF2(aws_byte_buf_append_byte_dynamic_secure(buffer, 0x1) == AWS_OP_SUCCESS, AWS_OP_ERR);
    return AWS_OP_SUCCESS;
}