File content as of revision 94:61d44636f020:

#include "DeviceMemory.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define PLATFORM_CREDENTIALS_FILE "001_CREDENTIALS"
#define CONFIGURATION_FILE "002_CONFIGURATION"

DeviceMemory::DeviceMemory(MDMSerial& mdm) :
    _mdm(mdm)
{
}

bool DeviceMemory::loadPlatformCredentials(char *username, char *password, size_t len)
{
    char buffer[len*2+3]; 
    int res = _mdm.readFile(PLATFORM_CREDENTIALS_FILE, buffer, sizeof(buffer));
    if (res < 0)
        return false;

    buffer[(size_t)res] = '\0';
    int len2=0;
    sscanf(buffer, "%s\n%s\n%n", username, password, &len2);
    return res == len2;
}

bool DeviceMemory::savePlatformCredentials(char *username, char *password, size_t len)
{
    char buffer[len*2+3]; 
    int res = snprintf(buffer, sizeof(buffer), "%s\n%s\n", username, password);
    if (res<0 || res>=sizeof(buffer))
        return false;

    return ((resetPlatformCredentials()) && (res == _mdm.writeFile(PLATFORM_CREDENTIALS_FILE, buffer, res)));
}

bool DeviceMemory::resetPlatformCredentials()
{
    return _mdm.delFile(PLATFORM_CREDENTIALS_FILE);
}


bool DeviceMemory::loadConfiguration(char *cfg, size_t len)
{
    int res = _mdm.readFile(CONFIGURATION_FILE, cfg, len);
    if (res < 0)
        return false;
    
    cfg[(size_t)res] = '\0';
    return true;
}

bool DeviceMemory::saveConfiguration(char *cfg)
{
    size_t len = strlen(cfg);
    return ((resetConfiguration()) && (_mdm.writeFile(CONFIGURATION_FILE, cfg, len) == len));
}

bool DeviceMemory::resetConfiguration()
{
    return _mdm.delFile(CONFIGURATION_FILE);
}