source: cpp/common/nonstd_stdio.cpp @ 1327

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2015  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

#include "nonstd_stdio.h"
#include "nonstd.h"
#include "Convert.h" //utf8ToUtf16()
#include <common/util-string.h>

#ifdef _WIN32
#include "Shlwapi.h" //PathIsRelative()
#ifdef __BORLANDC__
#pragma link "Shlwapi.lib" //PathIsRelative()
#endif
#include <sys/stat.h> //_stat
#else
#include <unistd.h>
#endif



#ifdef _WIN32
FILE* mfile_wfopen(const char *path, const char *mode) //to avoid converting args into wide char in all occurrences of mfopen()
{
        return _wfopen(Convert::utf8ToUtf16(path).c_str(), Convert::strTOwstr(mode).c_str());
}
#endif

bool fileExists(const char* path)
{
        //lepiej gdyby uzywalo stat bo mfopen mogloby cos niepotrzebnie wczytywac przy otwarciu pliku ale mfopen wiadomo ze zadziala wszedzie tak samo
        MFILE *f = mfopen(path, FOPEN_READ_BINARY);
        if (f == NULL) return false;
        mfclose(f);
        return true;
}

#ifdef _WIN32
bool isDirWritable(const char* path) //dir must not end with '\'
{
        wstring dir = Convert::utf8ToUtf16(path);
        CreateDirectoryW(dir.c_str(), 0);
        dir += L"\\test_file.write";
        _wunlink(dir.c_str());
        FILE *f = _wfopen(dir.c_str(), L"wt");
        if (f)
        {
                fclose(f);
                _wunlink(dir.c_str());
                return true;
        }
        else
                return false;
}
#endif

bool directoryExists(const char* path, bool is_writable)
{
        struct _stat s;
        if (path[0] == 0) path = ".";
#ifdef _WIN32
        if (_wstat(Convert::utf8ToUtf16(path).c_str(), &s) != 0) return false;
#else
        if (_stat(path, &s) != 0) return false;
#endif
        if (S_ISDIR(s.st_mode))
        {
                if (is_writable)
                {
#ifdef _WIN32
#ifndef W_OK
#define W_OK 2 //http://msdn.microsoft.com/en-us/library/1w06ktdy.aspx
#endif
                        //under Windows, access() is not a reliable way to check if a directory is writable
                        //http://stackoverflow.com/questions/198071/code-for-checking-write-permissions-for-directories-in-win2k-xp
                        //bool writable_access = _waccess(Convert::utf8ToUtf16(path).c_str(), W_OK) == 0;
                        bool writable_trial = isDirWritable(path);
                        //printf("Checking '%s' for writing(%d) using access(): result=%d\n", path, is_writable, writable_access);
                        //printf("File creation test: result=%d\n", writable_trial);
                        //return writable_access;
                        return writable_trial;
#else
                        return access(path, W_OK) == 0;
#endif
                }
                else
                        return true;
        }
        return false;
}

bool makeDirectory(const char* path)
{
#ifdef _WIN32
        return _wmkdir(Convert::utf8ToUtf16(path).c_str()) == 0;
#else
        return mkdir(path,0777) == 0;
#endif
}

bool makeDirectories(const char* path)
{
        if (directoryExists(path,false)) return true;
        string parentdir = getFileDir(path);
        if (!makeDirectories(parentdir.c_str())) return false;
        return makeDirectory(path);
}

int getFileSize(const char* path)
{
        int size;
        MFILE *f = mfopen(path, FOPEN_READ_BINARY);
        if (f == NULL) return -1;
        size = getFileSize(f);
        mfclose(f);
        return size;
}

int getFileSize(MFILE *f)
{
        int saved_pos = (int)mftell(f);
        mfseek(f, 0, SEEK_END);
        int size = (int)mftell(f);
        mfseek(f, saved_pos, SEEK_SET);
        return size;
}

bool removeFile(const char* path)
{
#ifdef _WIN32
        return _wunlink(Convert::utf8ToUtf16(path).c_str()) == 0;
#else
        return _unlink(path) == 0; //VS: "The POSIX name is deprecated. Instead, use the ISO C++ conformant name: _unlink"
#endif
}

bool isAbsolutePath(const char* fname)
{
        if (fname == NULL) return false; //SplitFileSystem never passes NULL but this function is public so we never know
#ifdef _WIN32
        return PathIsRelativeW(Convert::utf8ToUtf16(fname).c_str()) == FALSE; //http://msdn.microsoft.com/en-us/library/bb773660%28v=vs.85%29.aspx
#else
        return fname[0] == PATH_SEPARATOR_CHAR;
#endif
}

#if defined SHP && defined BADA_API_1

MFILE *mfopen(const char *path, const char *mode)
{
        Osp::Io::File *f = new Osp::Io::File();
        result r = f->Construct(path, mode);
        if (IsFailed(r))
        {
                delete f;
                f = NULL;
        }
        return f;
}

void mfclose(MFILE *f)
{
        delete f;
}

int mfread(void *ptr, int size, int count, MFILE *f)
{
        int bytes = size * count;
        int przeczytane = f->Read(ptr, bytes);
        return przeczytane != bytes ? przeczytane / size : count;
}

int mfwrite(const void *ptr, int size, int count, MFILE *f)
{
        result r = f->Write(ptr, size * count);
        if (IsFailed(r))
                return 0; //nie mozemy wykryc jesli udalo sie zapisac czêœæ
        else
                return count;
}

int mfputs(const char *txt, MFILE *f)
{
        int len = strlen(txt);
        int res = mfwrite(txt, len, 1, f);
        return res == 1 ? 1 : EOF;
}

char* mfgets(char *str, int num, MFILE *f)
{
        bool err = false;
        int przeczytane = 0;
        num--; //zeby zawsze zostalo miejsce na wpisanie koncz¹cego NULL
        do
        {
                err = f->Read(str, 1) != 1;
                if (!err)
                {
                        str++;
                        przeczytane++;
                }
        } while (!err && przeczytane<num && *str != '\n');
        if (*str == '\n' && przeczytane<num)
                *(str + 1) = 0;
        return przeczytane == 0 ? NULL : str;
}

int mfeof(MFILE *f)
{
        //brzydkie obejscie zeby w bada wykryc czy FILE jest w stanie EOF
        static char buf[1];
        int pos = f->Tell();
        int przeczytane = f->Read(&buf, 1);
        f->Seek(Osp::Io::FILESEEKPOSITION_BEGIN,pos);
        return przeczytane == 1 ? 0 : 1;
}

int mfseek(MFILE *f, long position, int type)
{
        result r;
        if (type == SEEK_SET)
                r = f->Seek(Osp::Io::FILESEEKPOSITION_BEGIN, position);
        else if (type == SEEK_CUR)
                r = f->Seek(Osp::Io::FILESEEKPOSITION_CURRENT, position);
        else if (type == SEEK_END)
                r = f->Seek(Osp::Io::FILESEEKPOSITION_END, position);
        else
                return 1;
        return IsFailed(r) ? 1 : 0;
}

long mftell(MFILE *f)
{
        return f->Tell();
}

#endif





#ifdef __ANDROID__
#include "log.h"
#include "dirs.h"
#include "nonstd_stl.h"
MFILE *mfopen(const char *path, const char *mode)
{
        string respath=getAppResourcesDir();
        //log_printf("Opening '%s', mode='%s'",path,mode);
        //log_printf("getAppResourcesDir()='%s'",respath.c_str());
        //log_printf("getAppWritableDir()='%s'",getAppWritableDir().c_str());
        NvFile *rfile=NULL; //can only read
        FILE *rwfile=NULL;
        if (strstr(path,respath.c_str())==path) //opening resource! so we use a dedicated way to read from assets
        {
                path+=respath.length(); //strip the prefix, we need a relative path in assets
                if (path[0]=='/') path++; //also strip slash if it was there (the prefix has no trailing slash so it doesn't get stipped above)
                if (strstr(mode,"w"))
                        log_printf("Warning: attempt to open a read-only resource '%s' in writable mode '%s'",path,mode);
                rfile=NvFOpen(path); //"mode" not supported! can only read
                //log_printf("Opened RES file as %p",rfile);
                if (rfile==NULL) return NULL;
        } else //a "normal" access (HOME)
        {
                rwfile=fopen(path,mode);
                //log_printf("Opened HOME file as %p",rwfile);
                if (rwfile==NULL) return NULL;
        }
        MFILE *mfile=new MFILE;
        mfile->rfile=rfile;
        mfile->rwfile=rwfile;
        return mfile;
}

void mfclose(MFILE *f)
{
        if (f->rfile)
                NvFClose(f->rfile);
        else
                fclose(f->rwfile);

        delete f;
}

int mfread(void *ptr, int size, int count, MFILE *f)
{
        if (f->rfile)
                return NvFRead(ptr, size, count, f->rfile); //nvidia introduced my corrections in SDK v10.14, so a fix is no longer needed here
        else
                return fread(ptr, size, count, f->rwfile);
}

int mfwrite(const void *ptr, int size, int count, MFILE *f)
{
        if (f->rfile)
                return 0; //write not supported in assets using nvidia functions
        else
                return fwrite(ptr, size, count, f->rwfile);
}

int mfputs(const char *txt, MFILE *f)
{
        int len = strlen(txt);
        if (len==0) //when writing X 0-byte elements, fwrite() will return 0 ("0 elements written" instead of "X elements") but this is not an error
                return 1; //for simplicity, we don't even try to write 0 bytes and report a success
        int res = mfwrite(txt, len, 1, f); //write 1 element of len bytes
        return res == 1 ? 1 : EOF;
}

char* mfgets(char *str, int num, MFILE *f)
{
        if (f->rfile)
        {
                char *ret=NvFGets(str, num, f->rfile);
                //fixing nvidia inconsistency... their function never returns NULL (fix submitted)
                if (ret!=NULL && *ret==0 && num>0) //nothing has been read, must have been eof
                        return NULL;
                return ret;
        }
        else
                return fgets(str,num,f->rwfile);
}

int mfeof(MFILE *f)
{
        if (f->rfile)
                return NvFEOF(f->rfile);
        else
                return feof(f->rwfile);
}

int mfseek(MFILE *f, long position, int type)
{
        if (f->rfile)
                return NvFSeek(f->rfile, position, type); //nvidia introduced my corrections in SDK v10.14, so a fix is no longer needed here
        else
                return fseek(f->rwfile, position, type);
}

long mftell(MFILE *f)
{
        if (f->rfile)
                return NvFTell(f->rfile);
        else
                return ftell(f->rwfile);
}
#endif