platform/pocketpc.c
author Ryan C. Gordon <icculus@icculus.org>
Fri, 22 Nov 2002 06:17:59 +0000
changeset 501 fa1298d1157b
child 566 1e640d4acab9
permissions -rw-r--r--
Initial add.

/*
 * Skeleton platform-dependent support routines for PhysicsFS.
 *
 * Please see the file LICENSE in the source's root directory.
 *
 *  This file written by Ryan C. Gordon.
 */

#if HAVE_CONFIG_H
#  include <config.h>
#endif

#include <stdio.h>
#include <windows.h>

#define __PHYSICSFS_INTERNAL__
#include "physfs_internal.h"

#define INVALID_FILE_ATTRIBUTES		0xFFFFFFFF
#define INVALID_SET_FILE_POINTER	0xFFFFFFFF
typedef struct
{
    HANDLE handle;
    int readonly;
} winCEfile;


const char *__PHYSFS_platformDirSeparator = "\\";

/*
 * Figure out what the last failing Win32 API call was, and
 *  generate a human-readable string for the error message.
 *
 * The return value is a static buffer that is overwritten with
 *  each call to this function.
 */
static const char *win32strerror(void)
{
    static TCHAR msgbuf[255];
    TCHAR *ptr = msgbuf;

    FormatMessage(
        FORMAT_MESSAGE_FROM_SYSTEM |
        FORMAT_MESSAGE_IGNORE_INSERTS,
        NULL,
        GetLastError(),
        MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), /* Default language */
        msgbuf,
        sizeof (msgbuf) / sizeof (TCHAR),
        NULL 
    );

        /* chop off newlines. */
    for (ptr = msgbuf; *ptr; ptr++)
    {
        if ((*ptr == '\n') || (*ptr == '\r'))
        {
            *ptr = ' ';
            break;
        } /* if */
    } /* for */

    return((const char *) msgbuf);
} /* win32strerror */


static char *UnicodeToAsc(const wchar_t *w_str)
{
	char *str=NULL;

	if(w_str!=NULL)
	{
		int len=wcslen(w_str)+1;
		str=(char *)malloc(len);

		if(WideCharToMultiByte(CP_ACP,0,w_str,-1,str,len,NULL,NULL)==0)
		{	//Conversion failed
			free(str);
			return NULL;
		}
		else
		{	//Conversion successful
			return(str);
		}

	}
	else
	{	//Given NULL string
		return NULL;
	}
}

static wchar_t *AscToUnicode(const char *str)
{
	wchar_t *w_str=NULL;
	if(str!=NULL)
	{
		int len=strlen(str)+1;
		w_str=(wchar_t *)malloc(sizeof(wchar_t)*len);
		if(MultiByteToWideChar(CP_ACP,0,str,-1,w_str,len)==0)
		{
			free(w_str);
			return NULL;
		}
		else
		{
			return(w_str);
		}
	}
	else
	{
		return NULL;
	}
}


int __PHYSFS_platformInit(void)
{
    return(1);  /* always succeed. */
} /* __PHYSFS_platformInit */


int __PHYSFS_platformDeinit(void)
{
    return(1);  /* always succeed. */
} /* __PHYSFS_platformDeinit */


char **__PHYSFS_platformDetectAvailableCDs(void)
{
    BAIL_MACRO(ERR_NOT_IMPLEMENTED, NULL);
} /* __PHYSFS_platformDetectAvailableCDs */


char *__PHYSFS_platformCalcBaseDir(const char *argv0)
{
	return("\\");
//    BAIL_MACRO(ERR_NOT_IMPLEMENTED, NULL);
} /* __PHYSFS_platformCalcBaseDir */


char *__PHYSFS_platformGetUserName(void)
{
    BAIL_MACRO(ERR_NOT_IMPLEMENTED, NULL);
} /* __PHYSFS_platformGetUserName */


char *__PHYSFS_platformGetUserDir(void)
{
	return("\\");
    BAIL_MACRO(ERR_NOT_IMPLEMENTED, NULL);
} /* __PHYSFS_platformGetUserDir */


PHYSFS_uint64 __PHYSFS_platformGetThreadID(void)
{
    return(1);  /* single threaded. */
} /* __PHYSFS_platformGetThreadID */


int __PHYSFS_platformStricmp(const char *x, const char *y)
{    
	const char *p1 = x, *p2 = y;
	int r = 0;

    while((*p1) && (*p2) && (toupper(*p1++) == toupper(*p2++)))  ++r;

    r = (!((*p1) || (*p2)) ? (0) : ((toupper(*p1) > toupper(*p2)) ?
                                    (r + 1) : -(r + 1)));

    return(r);

} /* __PHYSFS_platformStricmp */


int __PHYSFS_platformExists(const char *fname)
{
	int retval=0;

	wchar_t *w_fname=AscToUnicode(fname);
	
	if(w_fname!=NULL)
	{
		retval=(GetFileAttributes(w_fname) != INVALID_FILE_ATTRIBUTES);
		free(w_fname);
	}

	return(retval);
} /* __PHYSFS_platformExists */


int __PHYSFS_platformIsSymLink(const char *fname)
{
    BAIL_MACRO(ERR_NOT_IMPLEMENTED, 0);
} /* __PHYSFS_platformIsSymlink */


int __PHYSFS_platformIsDirectory(const char *fname)
{
	int retval=0;

	wchar_t *w_fname=AscToUnicode(fname);

	if(w_fname!=NULL)
	{
	    retval=((GetFileAttributes(w_fname) & FILE_ATTRIBUTE_DIRECTORY) != 0);
		free(w_fname);
	}

	return(retval);
} /* __PHYSFS_platformIsDirectory */


char *__PHYSFS_platformCvtToDependent(const char *prepend,
                                      const char *dirName,
                                      const char *append)
{
    int len = ((prepend) ? strlen(prepend) : 0) +
              ((append) ? strlen(append) : 0) +
              strlen(dirName) + 1;
    char *retval = malloc(len);
    char *p;

    BAIL_IF_MACRO(retval == NULL, ERR_OUT_OF_MEMORY, NULL);

    if (prepend)
        strcpy(retval, prepend);
    else
        retval[0] = '\0';

    strcat(retval, dirName);

    if (append)
        strcat(retval, append);

    for (p = strchr(retval, '/'); p != NULL; p = strchr(p + 1, '/'))
        *p = '\\';

    return(retval);
} /* __PHYSFS_platformCvtToDependent */


void __PHYSFS_platformTimeslice(void)
{
    Sleep(10);
} /* __PHYSFS_platformTimeslice */


LinkedStringList *__PHYSFS_platformEnumerateFiles(const char *dirname,
                                                  int omitSymLinks)
{
    LinkedStringList *retval = NULL;
    LinkedStringList *l = NULL;
    LinkedStringList *prev = NULL;
    HANDLE dir;
    WIN32_FIND_DATA ent;
    char *SearchPath;
	wchar_t *w_SearchPath;
    size_t len = strlen(dirname);

    /* Allocate a new string for path, maybe '\\', "*", and NULL terminator */
    SearchPath = (char *) alloca(len + 3);
    BAIL_IF_MACRO(SearchPath == NULL, ERR_OUT_OF_MEMORY, NULL);	

    /* Copy current dirname */
    strcpy(SearchPath, dirname);

    /* if there's no '\\' at the end of the path, stick one in there. */
    if (SearchPath[len - 1] != '\\')
    {
        SearchPath[len++] = '\\';
        SearchPath[len] = '\0';
    } /* if */

    /* Append the "*" to the end of the string */
    strcat(SearchPath, "*");

	w_SearchPath=AscToUnicode(SearchPath);

    dir = FindFirstFile(w_SearchPath, &ent);
	free(w_SearchPath);
	free(SearchPath);

	if(dir == INVALID_HANDLE_VALUE)
	{
		return NULL;
	}

    do
    {
        if (wcscmp(ent.cFileName, L".") == 0)
            continue;

        if (wcscmp(ent.cFileName, L"..") == 0)
            continue;

        l = (LinkedStringList *) malloc(sizeof (LinkedStringList));
        if (l == NULL)
            break;

		l->str=UnicodeToAsc(ent.cFileName);

        if (l->str == NULL)
        {
            free(l);
            break;
        }


        if (retval == NULL)
            retval = l;
        else
            prev->next = l;

        prev = l;
        l->next = NULL;
    } while (FindNextFile(dir, &ent) != 0);

    FindClose(dir);
    return(retval);
} /* __PHYSFS_platformEnumerateFiles */


char *__PHYSFS_platformCurrentDir(void)
{
	return("\\");
} /* __PHYSFS_platformCurrentDir */


char *__PHYSFS_platformRealPath(const char *path)
{
	char *retval=(char *)malloc(strlen(path)+1);

	strcpy(retval,path);

	return(retval);

} /* __PHYSFS_platformRealPath */


int __PHYSFS_platformMkDir(const char *path)
{
	wchar_t *w_path = AscToUnicode(path);
	if(w_path!=NULL)
	{
	    DWORD rc = CreateDirectory(w_path, NULL);
		free(w_path);
		if(rc==0)
		{
			return(0);
		}
		return(1);
	}
	else
	{
		return(0);
	}
} /* __PHYSFS_platformMkDir */


static void *doOpen(const char *fname, DWORD mode, DWORD creation, int rdonly)
{
    HANDLE fileHandle;
    winCEfile *retval;
	wchar_t *w_fname=AscToUnicode(fname);

    fileHandle = CreateFile(w_fname, mode, FILE_SHARE_READ, NULL,
                            creation, FILE_ATTRIBUTE_NORMAL, NULL);

	free(w_fname);

	if(fileHandle==INVALID_HANDLE_VALUE)
	{
		return NULL;
	}

    BAIL_IF_MACRO(fileHandle == INVALID_HANDLE_VALUE, win32strerror(), NULL);

	retval = malloc(sizeof (winCEfile));
	if (retval == NULL)
	{
		CloseHandle(fileHandle);
		BAIL_MACRO(ERR_OUT_OF_MEMORY, NULL);
	} /* if */

	retval->readonly = rdonly;
	retval->handle = fileHandle;
	return(retval);
} /* doOpen */


void *__PHYSFS_platformOpenRead(const char *filename)
{
    return(doOpen(filename, GENERIC_READ, OPEN_EXISTING, 1));
} /* __PHYSFS_platformOpenRead */


void *__PHYSFS_platformOpenWrite(const char *filename)
{
    return(doOpen(filename, GENERIC_WRITE, CREATE_ALWAYS, 0));
} /* __PHYSFS_platformOpenWrite */


void *__PHYSFS_platformOpenAppend(const char *filename)
{
    void *retval = doOpen(filename, GENERIC_WRITE, OPEN_ALWAYS, 0);
    if (retval != NULL)
    {
        HANDLE h = ((winCEfile *) retval)->handle;
        if (SetFilePointer(h, 0, NULL, FILE_END) == INVALID_SET_FILE_POINTER)
        {
            const char *err = win32strerror();
            CloseHandle(h);
            free(retval);
            BAIL_MACRO(err, NULL);
        } /* if */
    } /* if */

    return(retval);

} /* __PHYSFS_platformOpenAppend */


PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buffer,
                                    PHYSFS_uint32 size, PHYSFS_uint32 count)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    DWORD CountOfBytesRead;
    PHYSFS_sint64 retval;

    /* Read data from the file */
    /*!!! - uint32 might be a greater # than DWORD */
    if(!ReadFile(FileHandle, buffer, count * size, &CountOfBytesRead, NULL))
    {
		retval=-1;
    } /* if */
    else
    {
        /* Return the number of "objects" read. */
        /* !!! - What if not the right amount of bytes was read to make an object? */
        retval = CountOfBytesRead / size;
    } /* else */

    return(retval);

} /* __PHYSFS_platformRead */


PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
                                     PHYSFS_uint32 size, PHYSFS_uint32 count)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    DWORD CountOfBytesWritten;
    PHYSFS_sint64 retval;

    /* Read data from the file */
    /*!!! - uint32 might be a greater # than DWORD */
    if(!WriteFile(FileHandle, buffer, count * size, &CountOfBytesWritten, NULL))
    {
		retval=-1;
    } /* if */
    else
    {
        /* Return the number of "objects" read. */
        /*!!! - What if not the right number of bytes was written? */
        retval = CountOfBytesWritten / size;
    } /* else */

	return(retval);

} /* __PHYSFS_platformWrite */


int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    DWORD HighOrderPos;
    DWORD rc;

    /* Get the high order 32-bits of the position */
    //HighOrderPos = HIGHORDER_UINT64(pos);
	HighOrderPos = (unsigned long)(pos>>32);

    /*!!! SetFilePointer needs a signed 64-bit value. */
    /* Move pointer "pos" count from start of file */
    rc = SetFilePointer(FileHandle, (unsigned long)(pos&0x00000000ffffffff),
                        &HighOrderPos, FILE_BEGIN);

    if ((rc == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
	{
        BAIL_MACRO(win32strerror(), 0);
	}

    return(1);  /* No error occured */
} /* __PHYSFS_platformSeek */


PHYSFS_sint64 __PHYSFS_platformTell(void *opaque)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    DWORD HighPos = 0;
    DWORD LowPos;
    PHYSFS_sint64 retval;

    /* Get current position */
    LowPos = SetFilePointer(FileHandle, 0, &HighPos, FILE_CURRENT);
    if ((LowPos == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
    {
        BAIL_MACRO(win32strerror(), 0);
    } /* if */
    else
    {
        /* Combine the high/low order to create the 64-bit position value */
        retval = (((PHYSFS_uint64) HighPos) << 32) | LowPos;
        //assert(retval >= 0);
    } /* else */

    return(retval);
} /* __PHYSFS_platformTell */


PHYSFS_sint64 __PHYSFS_platformFileLength(void *opaque)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    DWORD SizeHigh;
    DWORD SizeLow;
    PHYSFS_sint64 retval;

    SizeLow = GetFileSize(FileHandle, &SizeHigh);
    if ((SizeLow == INVALID_SET_FILE_POINTER) && (GetLastError() != NO_ERROR))
    {
        BAIL_MACRO(win32strerror(), -1);
    } /* if */
    else
    {
        /* Combine the high/low order to create the 64-bit position value */
        retval = (((PHYSFS_uint64) SizeHigh) << 32) | SizeLow;
        //assert(retval >= 0);
    } /* else */

    return(retval);
} /* __PHYSFS_platformFileLength */


int __PHYSFS_platformEOF(void *opaque)
{
    PHYSFS_sint64 FilePosition;
    int retval = 0;

    /* Get the current position in the file */
    if ((FilePosition = __PHYSFS_platformTell(opaque)) != 0)
    {
        /* Non-zero if EOF is equal to the file length */
        retval = FilePosition == __PHYSFS_platformFileLength(opaque);
    } /* if */

    return(retval);
} /* __PHYSFS_platformEOF */


int __PHYSFS_platformFlush(void *opaque)
{
    winCEfile *fh = ((winCEfile *) opaque);
    if (!fh->readonly)
        BAIL_IF_MACRO(!FlushFileBuffers(fh->handle), win32strerror(), 0);

    return(1);
} /* __PHYSFS_platformFlush */


int __PHYSFS_platformClose(void *opaque)
{
    HANDLE FileHandle = ((winCEfile *) opaque)->handle;
    BAIL_IF_MACRO(!CloseHandle(FileHandle), win32strerror(), 0);
    free(opaque);
    return(1);
} /* __PHYSFS_platformClose */


int __PHYSFS_platformDelete(const char *path)
{
	wchar_t *w_path=AscToUnicode(path);

    /* If filename is a folder */
    if (GetFileAttributes(w_path) == FILE_ATTRIBUTE_DIRECTORY)
    {
		int retval=!RemoveDirectory(w_path);
		free(w_path);
        BAIL_IF_MACRO(retval, win32strerror(), 0);
    } /* if */
    else
    {
		int retval=!DeleteFile(w_path);
		free(w_path);
        BAIL_IF_MACRO(retval, win32strerror(), 0);
    } /* else */

    return(1);  /* if you got here, it worked. */
} /* __PHYSFS_platformDelete */


void *__PHYSFS_platformCreateMutex(void)
{
    return((void *) CreateMutex(NULL, FALSE, NULL));
} /* __PHYSFS_platformCreateMutex */


void __PHYSFS_platformDestroyMutex(void *mutex)
{
    CloseHandle((HANDLE) mutex);
} /* __PHYSFS_platformDestroyMutex */


int __PHYSFS_platformGrabMutex(void *mutex)
{
    return(WaitForSingleObject((HANDLE) mutex, INFINITE) != WAIT_FAILED);
} /* __PHYSFS_platformGrabMutex */


void __PHYSFS_platformReleaseMutex(void *mutex)
{
    ReleaseMutex((HANDLE) mutex);
} /* __PHYSFS_platformReleaseMutex */


PHYSFS_sint64 __PHYSFS_platformGetLastModTime(const char *fname)
{
    BAIL_MACRO(ERR_NOT_IMPLEMENTED, -1);
} /* __PHYSFS_platformGetLastModTime */

/* end of skeleton.c ... */