/*! @file SymbolTable.cc
 *  @brief SymbolTable Implementation
 *
 *  This file contains ...
 */

#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include <rld.h>

#include "SymbolTable.h"

namespace Coverage {

  SymbolTable::SymbolTable()
  {
  }

  SymbolTable::~SymbolTable()
  {
  }

  void SymbolTable::addSymbol(
    const std::string& symbol,
    const uint32_t     start,
    const uint32_t     length
  )
  {
    uint32_t       end = 0;
    symbol_entry_t entry;
    symbolInfo_t   symbolData;

    // Add an entry to the address map.
    end = start + length - 1;
    entry.low = start;
    entry.high = end;
    entry.symbol = symbol;
    contents[ end ] = entry;

    // Add an entry to the symbol information map.
    symbolData.startingAddress = start;
    symbolData.length = length;

    for ( auto& symData : info[ symbol ] ) {
      // The starting address could differ since we strip any suffixes beginning
      // with a '.'
      if ( symData.startingAddress != start ) {
        continue;
      }

      if ( symData.length != length ) {
        std::ostringstream what;
        what << "Different lengths for the symbol "
             << symbol
             << " (" << symData.length
             << " and " << length
             << ")";
        throw rld::error( what, "SymbolTable::addSymbol" );
      }
    }

    info[ symbol ].push_back( symbolData );
  }

  SymbolTable::symbolInfo* SymbolTable::getInfo( const std::string& symbol )
  {
    info_t::iterator it = info.find( symbol );

    if ( it == info.end() ) {
      return NULL;
    } else {
      return ( &(it->second) );
    }
  }

  uint32_t SymbolTable::getLength( const std::string& symbol )
  {
    info_t::iterator it = info.find( symbol );

    if ( it == info.end() ) {
      return 0;
    } else {
      return ( (*it).second.front().length );
    }
  }

  std::string SymbolTable::getSymbol( uint32_t address )
  {
    contents_t::iterator it;

    // Ensure that the symbol table is not empty.
    if ( contents.size() == 0 ) {
      return "";
    }

    // Find the first entry whose end address is greater
    // than the specified address.
    it = contents.lower_bound( address );

    // If an entry was found and its low address is less than or
    // equal to the specified address, then return the symbol.
    if ( ( it != contents.end() ) && ( ( it->second ).low <= address ) ) {
      return (it->second).symbol;
    }

    return "";
  }

  void SymbolTable::dumpSymbolTable( void )
  {
    symbolInfo           symbolTable;
    symbolInfoIterator_t symbolIterator;
    infoIterator_t       infoIterator;

    for (
      infoIterator = info.begin();
      infoIterator != info.end();
      infoIterator++
    ) {
      for (
        symbolIterator = infoIterator->second.begin();
        symbolIterator != infoIterator->second.end();
        symbolIterator++
      ) {
         std::cerr << infoIterator->first << ":\tStarting address = 0x"
                   << std::hex << symbolIterator->startingAddress << std::dec
                   << "\tLength = " << symbolIterator->length << std::endl;
      }
    }
  }

}