file.cpp

MONA是为数不多的C++语言编写的一个很小的操作系统

#include <monapi.h>
#include <monapi/messages.h>
#include "FileServer.h"
#include "file.h"

using namespace MonAPI;

monapi_cmemoryinfo* ReadFile(const char* file, bool prompt /*= false*/)
{
    if (prompt) printf("%s: Reading %s....", SVR, file);
    FileInputStream fis(file);
    if (fis.open() != 0)
    {
        if (prompt) printf("ERROR\n");
        return NULL;
    }

    monapi_cmemoryinfo* ret = monapi_cmemoryinfo_new();
    if (!monapi_cmemoryinfo_create(ret, fis.getFileSize() + 1, prompt))
    {
        monapi_cmemoryinfo_delete(ret);
        return NULL;
    }

    ret->Size--;
    fis.read(ret->Data, ret->Size);
    fis.close();
    ret->Data[ret->Size] = 0;
    if (prompt) printf("OK\n");
    return ret;
}

monapi_cmemoryinfo* ReadDirectory(const char* path, bool prompt /*= false*/)
{
    if (syscall_cd(path))
    {
        if (prompt) printf("%s: ERROR: directory not found: %s\n", SVR, path);
        return NULL;
    }
    if (syscall_dir_open())
    {
        if (prompt) printf("%s: ERROR: can not open directory: %s\n", SVR, path);
        return NULL;
    }

    HList<monapi_directoryinfo*> files;
    monapi_directoryinfo di;
    while (syscall_dir_read(di.name, &di.size, &di.attr) == 0)
    {
        files.add(new monapi_directoryinfo(di));
    }
    syscall_dir_close();
    syscall_cd("/");

    monapi_cmemoryinfo* ret = monapi_cmemoryinfo_new();
    int size = files.size();
    if (!monapi_cmemoryinfo_create(ret, sizeof(int) + size * sizeof(monapi_directoryinfo), prompt))
    {
        monapi_cmemoryinfo_delete(ret);
        while (files.size() > 0) delete files.removeAt(0);
        return NULL;
    }

    memcpy(ret->Data, &size, sizeof(int));
    monapi_directoryinfo* p = (monapi_directoryinfo*)&ret->Data[sizeof(int)];
    while (files.size() > 0)
    {
        monapi_directoryinfo* di2 = files.removeAt(0);
        memcpy(p, di2, sizeof(monapi_directoryinfo));
        delete di2;
        p++;
    }
    return ret;
}