text-mode default.
"
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
"{ Package: 'stx:libbasic' }"
FileStream subclass:#DirectoryStream
instanceVariableNames:'dirPointer readAheadEntry'
classVariableNames:''
poolDictionaries:''
category:'Streams-External'
!
!DirectoryStream primitiveDefinitions!
%{
#define UNIX_LIKE
#if defined(WIN32)
# undef UNIX_LIKE
#endif
#if defined(transputer)
# undef UNIX_LIKE
#endif
#ifdef UNIX_LIKE
# if defined(__GLIBC__) && (__GLIBC__ == 2)
# if defined(__GLIBC_MINOR__) && (__GLIBC_MINOR__ == 1)
/* there is a bug there, preventing 64bit readdir. */
# undef __USE_FILE_OFFSET64
# undef __USE_LARGEFILE64
# endif
# endif
# include <stdio.h>
# define _STDIO_H_INCLUDED_
# include <errno.h>
# define _ERRNO_H_INCLUDED_
# include <sys/types.h>
# include <sys/stat.h>
# ifdef HAS_OPENDIR
# include <sys/types.h>
# ifdef NEXT
# include <sys/dir.h>
# define DIRENT_STRUCT struct direct
# else
# include <dirent.h>
# define DIRENT_STRUCT struct dirent
# endif
# endif
/*
* on some systems errno is a macro ... check for it here
*/
# ifndef errno
extern errno;
# endif
#endif /* UNIX_LIKE */
#ifdef WIN32
# ifdef i386
# define _X86_
# endif
# undef INT
# undef Array
# undef Number
# undef Method
# undef Point
# undef Context
# undef Rectangle
# undef Block
# undef Time
# undef Date
/* # include <types.h> /* */
# include <stdarg.h> /* */
# include <errno.h>
# define _ERRNO_H_INCLUDED_
# include <windef.h> /* */
# include <winbase.h> /* */
/* # include <wingdi.h> /* */
/* # include <winuser.h> /* */
# ifdef __DEF_Array
# define Array __DEF_Array
# endif
# ifdef __DEF_Number
# define Number __DEF_Number
# endif
# ifdef __DEF_Method
# define Method __DEF_Method
# endif
# ifdef __DEF_Point
# define Point __DEF_Point
# endif
# ifdef __DEF_Block
# define Block __DEF_Block
# endif
# ifdef __DEF_Context
# define Context __DEF_Context
# endif
# ifdef __DEF_Date
# define Date __DEF_Date
# endif
# ifdef __DEF_Time
# define Time __DEF_Time
# endif
# define __HANDLEVal(o) (HANDLE)__externalAddressVal(o)
# ifndef DO_WRAP_CALLS
# define STX_C_CALL0(__nm__, __f__) __f__((__a1__))
# define STX_C_CALL1(__nm__, __f__, __a1__) __f__((__a1__))
# define STX_C_CALL2(__nm__, __f__, __a1__, __a2__) __f__((__a1__), (__a2__))
# define STX_C_CALL3(__nm__, __f__, __a1__, __a2__, __a3__) __f__((__a1__), (__a2__), (__a3__))
# define STX_API_CALL0(__nm__, __f__) __f__((__a1__))
# define STX_API_CALL1(__nm__, __f__, __a1__) __f__((__a1__))
# define STX_API_CALL2(__nm__, __f__, __a1__, __a2__) __f__((__a1__), (__a2__))
# define STX_API_CALL3(__nm__, __f__, __a1__, __a2__, __a3__) __f__((__a1__), (__a2__), (__a3__))
# else
# define STX_C_CALL0(__nm__, __f__) __STX_C_CALL0(__nm__,(void*)__f__)
# define STX_C_CALL1(__nm__, __f__, __a1__) __STX_C_CALL1(__nm__,(void*)__f__, (void*)(__a1__))
# define STX_C_CALL2(__nm__, __f__, __a1__, __a2__) __STX_C_CALL2(__nm__,(void*)__f__, (void*)(__a1__), (void*)(__a2__))
# define STX_C_CALL3(__nm__, __f__, __a1__, __a2__, __a3__) __STX_C_CALL3(__nm__,(void*)__f__, (void*)(__a1__), (void*)(__a2__), (void*)(__a3__))
# define STX_API_CALL0(__nm__, __f__) __STX_API_CALL0(__nm__,(void*)__f__)
# define STX_API_CALL1(__nm__, __f__, __a1__) __STX_API_CALL1(__nm__,(void*)__f__, (void*)(__a1__))
# define STX_API_CALL2(__nm__, __f__, __a1__, __a2__) __STX_API_CALL2(__nm__,(void*)__f__, (void*)(__a1__), (void*)(__a2__))
# define STX_API_CALL3(__nm__, __f__, __a1__, __a2__, __a3__) __STX_API_CALL3(__nm__,(void*)__f__, (void*)(__a1__), (void*)(__a2__), (void*)(__a3__))
# endif
#endif /* WIN32 */
%}
! !
!DirectoryStream primitiveFunctions!
%{
#ifndef HAS_OPENDIR
# if defined(__VMS__)
# define lib$find_file LIB$FIND_FILE
/*
** VMS readdir() routines.
** Written by Rich $alz, <rsalz@bbn.com> in August, 1990.
** This code has no copyright.
*/
/* 12-NOV-1990 added d_namlen field and special case "." name -GJC@MITECH.COM
*/
# ifndef _STDIO_H_INCLUDED_
# include <stdio.h>
# define _STDIO_H_INCLUDED_
# endif
# ifndef _CTYPE_H_INCLUDED_
# include <ctype.h>
# define _CTYPE_H_INCLUDED_
# endif
# ifndef _ERRNO_H_INCLUDED_
# include <errno.h>
# define _ERRNO_H_INCLUDED_
# endif
# ifndef _DESCRIP_H_INCLUDED_
# include <descrip.h>
# define _DESCRIP_H_INCLUDED_
# endif
# ifndef _RMSDEF_H_INCLUDED_
# include <rmsdef.h>
# define _RMSDEF_H_INCLUDED_
# endif
/*
* actually, the following has to go into dirent.h ...
*/
/* BEGIN included dirent.h
*
** Header file for VMS readdir() routines.
** Written by Rich $alz, <rsalz@bbn.com> in August, 1990.
** This code has no copyright.
**
** You must #include <descrip.h> before this file.
*/
/* 12-NOV-1990 added d_namlen field -GJC@MITECH.COM */
/* Data structure returned by READDIR(). */
struct dirent {
char d_name[100]; /* File name */
int d_namlen;
int vms_verscount; /* Number of versions */
int vms_versions[20]; /* Version numbers */
};
/* Handle returned by opendir(), used by the other routines. You
* are not supposed to care what's inside this structure. */
typedef struct _dirdesc {
long context;
int vms_wantversions;
char *pattern;
struct dirent entry;
struct dsc$descriptor_s pat;
} DIR;
#define rewinddir(dirp) seekdir((dirp), 0L)
extern DIR *opendir();
extern struct dirent *readdir();
extern long telldir();
extern void seekdir();
extern void closedir();
extern void vmsreaddirversions();
/*
* END dirent.h
*/
#define _DIRENT_H_INCLUDED_
/* Number of elements in vms_versions array */
#define VERSIZE(e) (sizeof e->vms_versions / sizeof e->vms_versions[0])
/* Linked in later. */
extern char *strrchr();
extern char *strcpy();
/* Don't need this when all these programs are lumped together. RLD
extern char *malloc();
*/
/*
** Open a directory, return a handle for later use.
*/
DIR *
opendir(name)
char *name;
{
DIR *dd;
/* Get memory for the handle, and the pattern. */
if ((dd = (DIR *)malloc(sizeof *dd)) == NULL) {
__threadErrno = ENOMEM;
return NULL;
}
if (strcmp(".",name) == 0) name = "";
dd->pattern = malloc((unsigned int)(strlen(name) + sizeof "*.*" + 1));
if (dd->pattern == NULL) {
free((char *)dd);
__threadErrno = ENOMEM;
return NULL;
}
/* Fill in the fields; mainly playing with the descriptor. */
(void)sprintf(dd->pattern, "%s*.*", name);
dd->context = 0;
dd->vms_wantversions = 0;
dd->pat.dsc$a_pointer = dd->pattern;
dd->pat.dsc$w_length = strlen(dd->pattern);
dd->pat.dsc$b_dtype = DSC$K_DTYPE_T;
dd->pat.dsc$b_class = DSC$K_CLASS_S;
return dd;
}
/*
** Set the flag to indicate we want versions or not.
*/
void
vmsreaddirversions(dd, flag)
DIR *dd;
int flag;
{
dd->vms_wantversions = flag;
}
/*
** Free up an opened directory.
*/
void
closedir(dd)
DIR *dd;
{
free(dd->pattern);
free((char *)dd);
}
/*
** Collect all the version numbers for the current file.
*/
static void
collectversions(dd)
DIR *dd;
{
struct dsc$descriptor_s pat;
struct dsc$descriptor_s res;
struct dirent *e;
char *p;
char buff[sizeof dd->entry.d_name];
int i;
char *text;
long context;
/* Convenient shorthand. */
e = &dd->entry;
/* Add the version wildcard, ignoring the "*.*" put on before */
i = strlen(dd->pattern);
text = malloc((unsigned int)(i + strlen(e->d_name)+ 2 + 1));
if (text == NULL)
return;
(void)strcpy(text, dd->pattern);
(void)sprintf(&text[i - 3], "%s;*", e->d_name);
/* Set up the pattern descriptor. */
pat.dsc$a_pointer = text;
pat.dsc$w_length = strlen(text);
pat.dsc$b_dtype = DSC$K_DTYPE_T;
pat.dsc$b_class = DSC$K_CLASS_S;
/* Set up result descriptor. */
res.dsc$a_pointer = buff;
res.dsc$w_length = sizeof buff - 2;
res.dsc$b_dtype = DSC$K_DTYPE_T;
res.dsc$b_class = DSC$K_CLASS_S;
/* Read files, collecting versions. */
for (context = 0; e->vms_verscount < VERSIZE(e); e->vms_verscount++) {
if (lib$find_file(&pat, &res, &context) == RMS$_NMF || context == 0)
break;
buff[sizeof buff - 1] = '\0';
if (p = strchr(buff, ';'))
e->vms_versions[e->vms_verscount] = atoi(p + 1);
else
e->vms_versions[e->vms_verscount] = -1;
}
free(text);
}
/*
** Read the next entry from the directory.
*/
struct dirent *
readdir(dd)
DIR *dd;
{
struct dsc$descriptor_s res;
char *p;
char buff[sizeof dd->entry.d_name + 10];
int i;
/* Set up result descriptor, and get next file. */
res.dsc$a_pointer = buff;
res.dsc$w_length = sizeof buff - 2;
res.dsc$b_dtype = DSC$K_DTYPE_T;
res.dsc$b_class = DSC$K_CLASS_S;
if (lib$find_file(&dd->pat, &res, &dd->context) == RMS$_NMF
|| dd->context == 0L)
/* None left... */
return NULL;
/* Force the buffer to end with a NUL. */
buff[sizeof buff - 1] = '\0';
for (p = buff; !isspace(*p); p++)
;
*p = '\0';
/* Skip any directory component and just copy the name. */
if (p = strchr(buff, ']'))
(void)strcpy(dd->entry.d_name, p + 1);
else
(void)strcpy(dd->entry.d_name, buff);
/* Clobber the version. */
if (p = strchr(dd->entry.d_name, ';'))
*p = '\0';
/* claus: empty dirs seems to leave *.* in the buffer ... */
if (strcmp(dd->entry.d_name, "*.*") == 0) {
return NULL;
}
dd->entry.d_namlen = strlen(dd->entry.d_name);
dd->entry.vms_verscount = 0;
if (dd->vms_wantversions)
collectversions(dd);
return &dd->entry;
}
/*
** Return something that can be used in a seekdir later.
*/
long
telldir(dd)
DIR *dd;
{
return dd->context;
}
/*
** Return to a spot where we used to be.
*/
void
seekdir(dd, pos)
DIR *dd;
long pos;
{
dd->context = pos;
}
# define HAS_OPENDIR
# endif /* __VMS__ */
#endif /* not HAS_OPENDIR */
%}
! !
!DirectoryStream class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
!
documentation
"
Instances of DirectoryStream allow reading a file-directory,
as if it was a stream of filenames.
Basically, its an interface to opendir, readdir and closedir.
Notice:
DirectoryStream is an ST/X special;
for portability, we recommend the use of Filename protocol.
[author:]
Claus Gittinger
[see also:]
Filename
"
! !
!DirectoryStream class methodsFor:'instance creation'!
directoryNamed:dirName
"return a DirectoryStream for directory named dirName, aString
Raises an openError, if the directory does not exists."
|newStream|
newStream := (self basicNew) text; pathName:dirName.
newStream openForReading isNil ifTrue:[^nil].
^ newStream
"
self directoryNamed:'adadasd'
self directoryNamed:'.'
"
! !
!DirectoryStream methodsFor:'access-reading'!
nextLine
"return the next filename as a string"
|prevEntry nextEntry|
%{
#ifdef HAS_OPENDIR
DIR *d;
DIRENT_STRUCT *dp;
OBJ dirP;
if (__INST(hitEOF) != true && (dirP = __INST(dirPointer)) != nil) {
__INST(lastErrorNumber) = nil;
d = (DIR *)__FILEVal(dirP);
__BEGIN_INTERRUPTABLE__
do {
do {
__threadErrno = 0;
dp = readdir(d);
/*
* for compatibility with ST-80,
* skip entries for '.' and '..'.
* If wanted, these must be added synthetically.
*/
} while (dp && ((strcmp(dp->d_name, ".")==0) || (strcmp(dp->d_name, "..")==0)));
} while ((dp == NULL) && (__threadErrno == EINTR));
__END_INTERRUPTABLE__
if (dp != NULL) {
nextEntry = __MKSTRING((char *)(dp->d_name));
} else {
if (__threadErrno) {
__INST(lastErrorNumber) = __MKSMALLINT(__threadErrno);
} else {
__INST(hitEOF) = true;
}
}
}
#else /* no HAS_OPENDIR */
# ifdef WIN32
HANDLE d;
WIN32_FIND_DATA data;
OBJ dirP;
int rslt;
if (__INST(hitEOF) != true && (dirP = __INST(dirPointer)) != nil) {
__INST(lastErrorNumber) = nil;
d = __HANDLEVal(dirP);
do {
__threadErrno = 0;
rslt = STX_API_CALL2( "FindNextFile", FindNextFile, d, &data );
} while ((rslt < 0) && (__threadErrno == EINTR));
if (rslt > 0) {
nextEntry = __MKSTRING( data.cFileName );
} else {
__INST(hitEOF) = true;
}
}
# endif /* WIN32 */
#endif /* HAS_OPENDIR */
%}.
lastErrorNumber notNil ifTrue:[^ self ioError].
prevEntry := readAheadEntry.
readAheadEntry := nextEntry.
prevEntry isNil ifTrue:[^ self pastEndRead].
^ prevEntry
! !
!DirectoryStream methodsFor:'closing'!
close
"close the stream - tell operating system"
dirPointer notNil ifTrue:[
Lobby unregister:self.
self closeFile.
dirPointer := nil
]
! !
!DirectoryStream protectedMethodsFor:'instance release'!
closeFile
"low level close of a directoryStream"
%{
#ifdef HAS_OPENDIR
OBJ dp;
if ((dp = __INST(dirPointer)) != nil) {
__INST(dirPointer) = nil;
closedir( (DIR *)(__FILEVal(dp)) );
}
#else
# ifdef WIN32
OBJ dp;
if ((dp = __INST(dirPointer)) != nil) {
__INST(dirPointer) = nil;
FindClose( __HANDLEVal(dp) );
}
# endif
#endif
%}
! !
!DirectoryStream methodsFor:'private'!
openForReading
"open the file for readonly"
|ok entry|
mode := #readonly.
%{
#ifdef HAS_OPENDIR
DIR *d;
OBJ path, dp;
ok = false;
if (__INST(dirPointer) == nil) {
path = __INST(pathName);
if (__isString(path)) {
__BEGIN_INTERRUPTABLE__
__threadErrno = 0;
do {
path = __INST(pathName);
d = opendir((char *) __stringVal(path));
} while ((d == NULL) && (__threadErrno == EINTR));
__END_INTERRUPTABLE__
if (d == NULL) {
__INST(lastErrorNumber) = __MKSMALLINT(__threadErrno);
} else {
__INST(dirPointer) = dp = __MKEXTERNALADDRESS(d); __STORE(self, dp);
ok = true;
}
}
}
#else
# ifdef WIN32
HANDLE d;
OBJ path, dp;
char pattern[512];
WIN32_FIND_DATA data;
ok = false;
if (__INST(dirPointer) == nil) {
path = __INST(pathName);
if (__isString(path)) {
int l = __stringSize(path);
if (l < (sizeof(pattern)-4)) {
strncpy(pattern, __stringVal(path), l);
strcpy(pattern+l, "\\*");
do {
__threadErrno = 0;
d = STX_API_CALL2( "FindFirstFile", FindFirstFile, pattern, &data );
} while ((d < 0) && (__threadErrno == EINTR));
if (d == INVALID_HANDLE_VALUE) {
__INST(lastErrorNumber) = __MKSMALLINT(GetLastError());
} else {
__INST(dirPointer) = dp = __MKEXTERNALADDRESS(d); __STORE(self, dp);
entry = __MKSTRING( data.cFileName );
ok = true;
}
}
}
}
# endif
#endif
%}.
ok isNil ifTrue:[
"
opendir not avalable - use slower pipe
"
^ PipeStream readingFrom:('cd ' , pathName , '; ls -a')
].
(ok == true) ifTrue:[
Lobby register:self.
entry isNil ifTrue:[
self nextLine. "read 1st entry into readAheadEntry buffer"
] ifFalse:[
readAheadEntry := entry.
].
^ self
].
dirPointer notNil ifTrue:[^ self errorAlreadyOpen].
lastErrorNumber notNil ifTrue:[^ self openError].
^ nil
!
reOpen
"USERS WILL NEVER INVOKE THIS METHOD
sent after snapin to reopen streams."
dirPointer := nil.
super reOpen
! !
!DirectoryStream methodsFor:'testing'!
atEnd
"return true, if position is at end"
^ readAheadEntry == nil
!
isEmpty
"test for if the unread portion of the directory stream is empty.
This query changes the readPointer of the DirectoryStream"
|entry|
[self atEnd] whileFalse:[
entry := self nextLine.
entry asFilename isImplicit ifFalse:[
^ false.
]
].
^ true
"
(DirectoryStream directoryNamed:'/') isEmpty
(DirectoryStream directoryNamed:'/var/tmp') isEmpty
"
"Modified: 18.9.1997 / 18:05:31 / stefan"
! !
!DirectoryStream class methodsFor:'documentation'!
version
^ '$Header: /cvs/stx/stx/libbasic/DirectoryStream.st,v 1.59 2005-03-10 12:32:54 cg Exp $'
! !