printable.cpp

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#include <config.h>

#include <cstring>
#include <iostream>
#include <sstream>

#include <jwsc++/base/exception.h>

#include "printable.h"


using std::ostringstream;
using jwscxx::base::IO_error;
using jwscxx::base::Arg_error;


const char* Printable::get_member_value
(
    const char*   member_name, 
    std::istream& in
) 
throw (Arg_error, IO_error)
{
    static char member_buf[256] = {0};

    in.getline(member_buf, 256);
    if (in.fail()) 
    {
        throw IO_error("Could not read member line");
    }

    const char* member_ptr = member_buf;

    while (isspace(*member_ptr) && *member_ptr != 0)
        member_ptr++;

    if (strncmp(member_ptr, member_name, strlen(member_name)) != 0)
    {
        ostringstream ost;
        ost << "Field name '" << member_name << "' not found in '" 
            << member_buf << "'";
        throw Arg_error(ost.str());
    }

    while (*member_ptr != ':' && *member_ptr != 0)
        member_ptr++;

    if (*member_ptr == 0)
    {
        ostringstream ost;
        ost << "Field '" << member_buf << "' improperly formatted";
        throw Arg_error(ost.str());
    }

    member_ptr++;

    while (isspace(*member_ptr) && *member_ptr != 0)
        member_ptr++;

    if (*member_ptr == 0)
        return 0;

    return member_ptr;
}


const char* Printable::get_next_member_value(const char* member_value) 
{
    while (!isspace(*member_value) && *member_value != 0)
        member_value++;

    if (*member_value == 0)
        return 0;

    while (isspace(*member_value) && *member_value != 0)
        member_value++;

    if (*member_value == 0)
        return 0;

    return member_value;
}