// See the file "COPYING" in the main distribution directory for copyright.

#include "pac_inputbuf.h"

#include "pac_expr.h"
#include "pac_exttype.h"
#include "pac_id.h"
#include "pac_output.h"
#include "pac_type.h"

InputBuffer::InputBuffer(Expr* expr) : DataDepElement(INPUT_BUFFER), expr_(expr) {}

bool InputBuffer::DoTraverse(DataDepVisitor* visitor) {
    if ( expr_ && ! expr_->Traverse(visitor) )
        return false;
    return true;
}

bool InputBuffer::RequiresAnalyzerContext() const { return expr_->RequiresAnalyzerContext(); }

DataPtr InputBuffer::GenDataBeginEnd(Output* out_cc, Env* env) {
    env->AddID(begin_of_data, TEMP_VAR, extern_type_const_byteptr);
    env->AddID(end_of_data, TEMP_VAR, extern_type_const_byteptr);

    out_cc->println("%s %s;", extern_type_const_byteptr->DataTypeStr().c_str(), env->LValue(begin_of_data));
    out_cc->println("%s %s;", extern_type_const_byteptr->DataTypeStr().c_str(), env->LValue(end_of_data));

    out_cc->println("get_pointers(%s, &%s, &%s);", expr_->EvalExpr(out_cc, env), env->LValue(begin_of_data),
                    env->LValue(end_of_data));

    env->SetEvaluated(begin_of_data);
    env->SetEvaluated(end_of_data);

    return DataPtr(env, begin_of_data, 0);
}