console.cpp

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/*****************************************************************************
** Includes
*****************************************************************************/

#include <cstdio>
#include <string>
#include <ecl/exceptions/standard_exception.hpp>
#include "../../include/ecl/devices/console.hpp"

/*****************************************************************************
** Namespaces
*****************************************************************************/

namespace ecl {

/*****************************************************************************
** Implementation [OConsole]
*****************************************************************************/

long OConsole::write(const char &c)
{
        long n = buffer.append(c);
        if ( buffer.full() ) {
                flush();
        }
        return n;
}

long OConsole::write(const char* s, unsigned long n)
{
        unsigned int no_written = 0;
        while ( no_written < n ) {
                no_written += buffer.append(s+no_written,n-no_written);
                if ( buffer.full() ) {
                        flush();
                }
        }
        return n;
}

void OConsole::flush() {
    fputs(buffer.c_str(),stdout);
    buffer.clear();
        int result = fflush(stdout);
        ecl_assert_throw ( result == 0, StandardException(LOC, WriteError, std::string("Could not flush to the standard output device.")));
}

/*****************************************************************************
** Implementation [EConsole]
*****************************************************************************/

long EConsole::write(const char &c)
{
        long n = buffer.append(c);
        if ( buffer.full() ) {
                flush();
        }
        return n;
}

long EConsole::write(const char* s, unsigned long n)
{
        unsigned int no_written = 0;
        while ( no_written < n ) {
                no_written += buffer.append(s+no_written,n-no_written);
                if ( buffer.full() ) {
                        flush();
                }
        }
        return n;
}

void EConsole::flush() {
    fputs(buffer.c_str(),stderr);
    buffer.clear();
        int result = fflush(stderr);
        ecl_assert_throw ( result == 0, StandardException(LOC, WriteError, std::string("Could not flush to the standard output device.")));
}

/*****************************************************************************
** Implementation [IConsole]
*****************************************************************************/

long IConsole::read(char &c)
{
        // fgets is a problem, it doesn't read the newline with the character,
        // which means the next read from stdin will catch that newline first.
    c = static_cast<char>(fgetc(stdin));
    if ( c == EOF ) {
        ecl_assert_throw( c != EOF, StandardException(LOC, ReadError, "Failed to read from standard input."));
        return 0; // fallover if not in debug mode.
    } else {
//      while ( fgetc(stdin) != '\n' ) {}
        return 1;
    }
}

long IConsole::read(char* s, const unsigned long &n)
{
    char *result = fgets(s,n,stdin);
    if ( result == NULL ) {
        ecl_debug_throw( StandardException(LOC, ReadError, "Failed to read from standard input."));
        return 0; // Fallover if not in debug mode.
    } else {
        // fgets always terminates with a null character, even if it manages
        // to read n-1 chars. We also need to make sure we drop the newline
        // character that was returned to trigger the input.
        size_t length = strlen(s); // This doesn't count the \0 character.
//      *(s+length-1) = '\0'; // drop the newline
//      return length-1;
        return length;
    }
}

} // namespace ecl