/*
 * Copyright 2012, Rene Gollent, rene@gollent.com.
 * Distributed under the terms of the MIT License.
 */


#include "CliStackFrameCommand.h"

#include <stdio.h>

#include <AutoLocker.h>

#include "CliContext.h"
#include "FunctionInstance.h"
#include "StackFrame.h"
#include "StackTrace.h"
#include "Team.h"


CliStackFrameCommand::CliStackFrameCommand()
        :
        CliCommand("set current stack frame",
                "%s [ <frame number> ]\n"
                "Sets the current stack frame to <frame number>, if supplied. "
                "Otherwise\n prints the current frame.")
{
}


void
CliStackFrameCommand::Execute(int argc, const char* const* argv,
        CliContext& context)
{
        if (argc > 2) {
                PrintUsage(argv[0]);
                return;
        }

        StackTrace* stackTrace = context.GetStackTrace();
        if (argc == 1) {
                int32 currentFrameIndex = context.CurrentStackFrameIndex();
                if (currentFrameIndex < 0)
                        printf("No current frame.\n");
                else {
                        StackFrame* frame = stackTrace->FrameAt(currentFrameIndex);
                        printf("Current frame: %" B_PRId32 ": %s\n", currentFrameIndex,
                                frame->Function()->PrettyName().String());
                }
                return;
        }
        // parse the argument
        char* endPointer;
        int32 frameNumber = strtol(argv[1], &endPointer, 0);
        if (*endPointer != '\0' || frameNumber < 0) {
                printf("Error: Invalid parameter \"%s\"\n", argv[1]);
                return;
        }

        if (stackTrace == NULL || frameNumber >= stackTrace->CountFrames()) {
                printf("Error: Index %" B_PRId32 " out of range\n", frameNumber);
                return;
        } else
                context.SetCurrentStackFrameIndex(frameNumber);
}