stdiomac.c

另一个分形程序

/*
	stdioMac.c
	
	C-style file I/O for Apple Macintosh
	Allows Mac file refs to be used instead of FILE*,
	also lets file be stamped with type/creator code
	upon creation. This is necessary, for example, to
	get GIFs recognized by NetScape Navigator since they
	need to be marked as TEXT type.

	Useful for porting C-style file I/O without changing too
	many things. The value normally used as FILE* is actually 
	a short int. Simple #ifdef calls to fopen, etc. and replace
	with fopenMac, etc.
	
	Binary mode only. Full read/write access given.
	Many functions NOT supported (fseek, fputs, etc.).
	See stdioMac.h for list of supported functions.

	Revision History:
	
	When		Who		What
	------------------------------------------------------------------
	Nov 11/96	taps	Created
	Nov 14/96	taps	Added Mac-to-string filespec converter
	
*/

#include "config.h"

#include <stdio.h>
#include <string.h>

#include "stdioMac.h"

unsigned char *PathNameFromWD (long vRefNum, unsigned char *s);
unsigned char *PathNameFromDirID (long DirID, short vRefNum,
				  unsigned char *s);
unsigned char *pStrcat (unsigned char *dest, unsigned char *src);
unsigned char *pStrcpy (unsigned char *dest, unsigned char *src);



FILE *
fopenMac (const char *fname, const char *, OSType creator, OSType fileType)
{
  short f;
  OSErr err;
  char fnamep[255];

  strcpy (fnamep, fname);
  c2pstr (fnamep);

  err = FSOpen ((StringPtr) fnamep, 0, &f);
  if (err == fnfErr)
    {
      err = Create ((StringPtr) fnamep, 0, creator, fileType);
      if (err == noErr)
	{
	  err = FSOpen ((StringPtr) fnamep, 0, &f);
	  if (err != noErr)
	    (void) FSDelete ((StringPtr) fnamep, 0);
	}

    }
  if (err != noErr)
    f = nil;

  return (FILE *) f;
}


size_t
fwriteMac (const void *buffer, size_t size, size_t count, FILE * fp)
{
  short f = (short) fp;

  OSErr err;
  long datacount = count * size;

  err = FSWrite (f, &datacount, buffer);
  if (err != noErr)
    datacount = 0;

  return ((size_t) datacount);
}


int
fputcMac (int c, FILE * fp)
{
  OSErr err;
  unsigned char buff;
  long cd;

  short f = (short) fp;

  buff = (unsigned char) c;
  cd = 1;
  err = FSWrite (f, &cd, &buff);
  return (err == noErr ? c : EOF);
}

int
fcloseMac (FILE * fp)
{
  return FSClose ((short) fp) == noErr ? 0 : EOF;
}




unsigned char *
FilespecFromSFReply (SFReply * sf, unsigned char *result)
{
  // Get the spelt-out version of a file (path and all) from an SFReply block.

  PathNameFromWD (sf->vRefNum, result);
  pStrcat (result, "\p:");
  pStrcat (result, sf->fName);
  return (result);
}


unsigned char *
PathNameFromWD (long vRefNum, unsigned char *s)
{

  WDPBRec myBlock;

  myBlock.ioNamePtr = nil;
  myBlock.ioVRefNum = vRefNum;
  myBlock.ioWDIndex = 0;
  myBlock.ioWDProcID = 0;

  /* Change the Working Directory number in vRefnum into a real vRefnum */
  /* and DirID. The real vRefnum is returned in ioVRefnum, and the real */
  /* DirID is returned in ioWDDirID. */

  PBGetWDInfo (&myBlock, false);

  return (PathNameFromDirID (myBlock.ioWDDirID, myBlock.ioWDVRefNum, s));
}


unsigned char *
PathNameFromDirID (long DirID, short vRefNum, unsigned char *s)
{
  CInfoPBRec block;
  Str255 directoryName;
  OSErr err;

  *s = 0;
  block.dirInfo.ioNamePtr = directoryName;
  block.dirInfo.ioDrParID = DirID;

  do
    {
      block.dirInfo.ioVRefNum = vRefNum;
      block.dirInfo.ioFDirIndex = -1;
      block.dirInfo.ioDrDirID = block.dirInfo.ioDrParID;

      err = PBGetCatInfo (&block, false);
      pStrcat (directoryName, "\p:");
      pStrcat (directoryName, s);
      pStrcpy (s, directoryName);
    }
  while (block.dirInfo.ioDrDirID != fsRtDirID);

  (*s) -= 1;			/* delete last character of string, which is a colon */
  return (s);
}

unsigned char *
pStrcat (unsigned char *dest, unsigned char *src)
{
  long sLen;
  if (*src < 255 - *dest)
    sLen = *src;
  else
    sLen = 255 - *dest;
  BlockMoveData (src + 1, dest + *dest + 1, sLen);
  *dest += sLen;
  return (dest);
}

unsigned char *
pStrcpy (unsigned char *dest, unsigned char *src)
{
  BlockMoveData (src, dest, (long) *src + 1);
  return (dest);
}