lldb/tools/lldb-mi/MICmdArgValFile.cpp

//===-- MICmdArgValFile.cpp -------------------------------------*- C++ -*-===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// In-house headers:
#include "MICmdArgValFile.h"
#include "MICmdArgContext.h"

//++ ------------------------------------------------------------------------------------
// Details: CMICmdArgValFile constructor.
// Type:    Method.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmdArgValFile::CMICmdArgValFile()
{
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmdArgValFile constructor.
// Type:    Method.
// Args:    vrArgName       - (R) Argument's name to search by.
//          vbMandatory     - (R) True = Yes must be present, false = optional argument.
//          vbHandleByCmd   - (R) True = Command processes *this option, false = not handled.
// Return:  None.
// Throws:  None.
//--
CMICmdArgValFile::CMICmdArgValFile(const CMIUtilString &vrArgName, const bool vbMandatory, const bool vbHandleByCmd)
    : CMICmdArgValBaseTemplate(vrArgName, vbMandatory, vbHandleByCmd)
{
}

//++ ------------------------------------------------------------------------------------
// Details: CMICmdArgValFile destructor.
// Type:    Overridden.
// Args:    None.
// Return:  None.
// Throws:  None.
//--
CMICmdArgValFile::~CMICmdArgValFile()
{
}

//++ ------------------------------------------------------------------------------------
// Details: Parse the command's argument options string and try to extract the value *this
//          argument is looking for.
// Type:    Overridden.
// Args:    vwArgContext    - (R) The command's argument options string.
// Return:  MIstatus::success - Functional succeeded.
//          MIstatus::failure - Functional failed.
// Throws:  None.
//--
bool
CMICmdArgValFile::Validate(CMICmdArgContext &vwArgContext)
{
    if (vwArgContext.IsEmpty())
        return m_bMandatory ? MIstatus::failure : MIstatus::success;

    // The GDB/MI spec suggests there is only parameter

    if (vwArgContext.GetNumberArgsPresent() == 1)
    {
        const CMIUtilString &rFile(vwArgContext.GetArgsLeftToParse());
        if (IsFilePath(rFile))
        {
            m_bFound = true;
            m_bValid = true;
            m_argValue = rFile.Trim('"');
            vwArgContext.RemoveArg(rFile);
            return MIstatus::success;
        }
        else
            return MIstatus::failure;
    }

    // In reality there are more than one option,  if so the file option
    // is the last one (don't handle that here - find the best looking one)
    const CMIUtilString::VecString_t vecOptions(vwArgContext.GetArgs());
    CMIUtilString::VecString_t::const_iterator it = vecOptions.begin();
    while (it != vecOptions.end())
    {
        const CMIUtilString &rTxt(*it);
        if (IsFilePath(rTxt))
        {
            m_bFound = true;

            if (vwArgContext.RemoveArg(rTxt))
            {
                m_bValid = true;
                m_argValue = rTxt.Trim('"');
                return MIstatus::success;
            }
            else
                return MIstatus::success;
        }

        // Next
        ++it;
    }

    return MIstatus::failure;
}

//++ ------------------------------------------------------------------------------------
// Details: Given some text extract the file name path from it. If a space is found in
//          path done return the path surrounded in quotes.
// Type:    Method.
// Args:    vrTxt   - (R) The text to extract the file name path from.
// Return:  CMIUtilString - File name and or path.
// Throws:  None.
//--
CMIUtilString
CMICmdArgValFile::GetFileNamePath(const CMIUtilString &vrTxt) const
{
    CMIUtilString fileNamePath(vrTxt);

    // Look for a space in the path
    const char cSpace = ' ';
    const size_t nPos = fileNamePath.find(cSpace);
    if (nPos != std::string::npos)
        fileNamePath = CMIUtilString::Format("\"%s\"", fileNamePath.c_str());

    return fileNamePath;
}

//++ ------------------------------------------------------------------------------------
// Details: Examine the string and determine if it is a valid file name path.
// Type:    Method.
// Args:    vrFileNamePath  - (R) File's name and directory path.
// Return:  bool -  True = yes valid file path, false = no.
// Throws:  None.
//--
bool
CMICmdArgValFile::IsFilePath(const CMIUtilString &vrFileNamePath) const
{
    if (vrFileNamePath.empty())
        return false;

    const bool bHavePosSlash = (vrFileNamePath.find('/') != std::string::npos);
    const bool bHaveBckSlash = (vrFileNamePath.find('\\') != std::string::npos);

    // Look for --someLongOption
    size_t nPos = vrFileNamePath.find("--");
    const bool bLong = (nPos == 0);
    if (bLong)
        return false;

    // Look for -f type short parameters
    nPos = vrFileNamePath.find('-');
    const bool bShort = (nPos == 0);
    if (bShort)
        return false;

    // Look for i1 i2 i3....
    nPos = vrFileNamePath.find('i');
    const bool bFoundI1 = ((nPos == 0) && (::isdigit(vrFileNamePath[1])));
    if (bFoundI1)
        return false;

    const bool bValidChars = IsValidChars(vrFileNamePath);
    if (bValidChars || bHavePosSlash || bHaveBckSlash)
        return true;

    return false;
}

//++ ------------------------------------------------------------------------------------
// Details: Determine if the path contains valid characters for a file path. Letters can be
//          either upper or lower case.
// Type:    Method.
// Args:    vrText  - (R) The text data to examine.
// Return:  bool - True = yes valid, false = one or more chars is valid.
// Throws:  None.
//--
bool
CMICmdArgValFile::IsValidChars(const CMIUtilString &vrText) const
{
    static CMIUtilString s_strSpecialCharacters(".'\"`@#$%^&*()_+-={}[]| ");
    const char *pPtr = vrText.c_str();
    for (MIuint i = 0; i < vrText.length(); i++, pPtr++)
    {
        const char c = *pPtr;
        if (::isalnum((int)c) == 0)
        {
            if (s_strSpecialCharacters.find(c) == CMIUtilString::npos)
                return false;
        }
    }

    return true;
}