fpc/rtl/macos/system.pp
olle 19e0c3eb31 + filehandling complete
+ heaphandling complete
  + support for random
  * filehandling now uses filedecriptors in StdCLib
  * other minor changes
  - removed DEFINE MAC_SYS_RUNNABLE
2003-09-12 12:45:15 +00:00

851 lines
21 KiB
ObjectPascal

{
$Id$
This file is part of the Free Pascal run time library.
Copyright (c) 2002 by Olle Raab
FreePascal system unit for MacOS.
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
**********************************************************************}
unit System;
interface
{ include system-independent routine headers }
{$I systemh.inc}
{Platform specific information}
const
LineEnding = #13;
LFNSupport = true;
DirectorySeparator = ':';
DriveSeparator = ':';
PathSeparator = ','; // Is used in MPW
FileNameCaseSensitive = false;
{ include heap support headers }
{$I heaph.inc}
const
{ Default filehandles }
UnusedHandle : Longint = -1;
StdInputHandle : Longint = 0;
StdOutputHandle : Longint = 1;
StdErrorHandle : Longint = 2;
sLineBreak = LineEnding;
DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsCR;
var
argc : longint;
argv : ppchar;
envp : ppchar;
implementation
{$define MACOS_USE_STDCLIB}
{ include system independent routines }
{$I system.inc}
{*********************** MacOS API *************}
{TODO: Perhaps the System unit should check the MacOS version to
ensure it is a supported version. }
{Below is some MacOS API routines needed for internal use.
Note, because the System unit is the most low level, it should not
depend on any other units, and in particcular not the MacOS unit.
Note: Types like Mac_XXX corresponds to the type XXX defined
in MacOS Universal Headers. The prefix is to avoid name clashes
with FPC types.}
type
SignedByte = shortint;
SignedBytePtr = ^SignedByte;
OSErr = Integer;
OSType = Longint;
Mac_Ptr = pointer;
Mac_Handle = ^Mac_Ptr;
Str31 = string[31];
Str32 = string[32];
Str63 = string[63];
Str255 = string[255];
FSSpec = record
vRefNum: Integer;
parID: Longint;
name: Str63;
end;
FSSpecPtr = ^FSSpec;
AliasHandle = Mac_Handle;
ScriptCode = Integer;
const
noErr = 0;
fnfErr = -43; //File not found error
fsFromStart = 1;
fsFromLEOF = 2;
function NewPtr(logicalSize: Longint): Mac_Ptr ;
external 'InterfaceLib';
procedure DisposeHandle(hdl: Mac_Handle);
external 'InterfaceLib';
function Mac_FreeMem: Longint;
external 'InterfaceLib' name 'FreeMem';
procedure Debugger;
external 'InterfaceLib';
procedure DebugStr(s: Str255);
external 'InterfaceLib';
procedure ExitToShell;
external 'InterfaceLib';
procedure SysBeep(dur: Integer);
external 'SysBeep';
function TickCount: Longint;
external 'InterfaceLib';
{$ifndef MACOS_USE_STDCLIB}
function FSpOpenDF(spec: FSSpec; permission: SignedByte;
var refNum: Integer): OSErr;
external 'InterfaceLib';
function FSpCreate(spec: FSSpec; creator, fileType: OSType;
scriptTag: ScriptCode): OSErr;
external 'InterfaceLib';
function FSClose(refNum: Integer): OSErr;
external 'InterfaceLib';
function FSRead(refNum: Integer; var count: Longint; buffPtr: Mac_Ptr): OSErr;
external 'InterfaceLib';
function FSWrite(refNum: Integer; var count: Longint; buffPtr: Mac_Ptr): OSErr;
external 'InterfaceLib';
function GetFPos(refNum: Integer; var filePos: Longint): OSErr;
external 'InterfaceLib';
function SetFPos(refNum: Integer; posMode: Integer; posOff: Longint): OSErr;
external 'InterfaceLib';
function GetEOF(refNum: Integer; var logEOF: Longint): OSErr;
external 'InterfaceLib';
function SetEOF(refNum: Integer; logEOF: Longint): OSErr;
external 'InterfaceLib';
function NewAliasMinimalFromFullPath(fullPathLength: Integer;
fullPath: Mac_Ptr; zoneName: Str32; serverName: Str31;
var alias: AliasHandle):OSErr;
external 'InterfaceLib';
function ResolveAlias(fromFile: FSSpecPtr; alias: AliasHandle;
var target: FSSpec; var wasChanged: Boolean):OSErr;
external 'InterfaceLib';
{$else}
{**************** API to StdCLib in MacOS *************}
{The reason StdCLib is used is that it can easily be connected
to either SIOW or, in case of MPWTOOL, to MPW }
{The prefix C_ or c_ is used where names conflicts with pascal
keywords and names. Suffix Ptr is added for pointer to a type.}
type
size_t = Longint;
off_t = Longint;
C_int = Longint;
C_short = Integer;
C_long = Longint;
C_unsigned_int = Cardinal;
var
errno: C_int; external name 'errno';
MacOSErr: C_short; external name 'MacOSErr';
const
_IOFBF = $00;
_IOLBF = $40;
_IONBF = $04;
O_RDONLY = $00; // Open for reading only.
O_WRONLY = $01; // Open for writing only.
O_RDWR = $02; // Open for reading & writing.
O_APPEND = $08; // Write to the end of the file.
O_RSRC = $10; // Open the resource fork.
O_ALIAS = $20; // Open alias file.
O_CREAT = $100; // Open or create a file.
O_TRUNC = $200; // Open and truncate to zero length.
O_EXCL = $400; // Create file only; fail if exists.
O_BINARY = $800; // Open as a binary stream.
O_NRESOLVE = $4000; // Don't resolve any aliases.
SEEK_SET = 0;
SEEK_CUR = 1;
SEEK_END = 2;
FIOINTERACTIVE = $00006602; // If device is interactive
FIOBUFSIZE = $00006603; // Return optimal buffer size
FIOFNAME = $00006604; // Return filename
FIOREFNUM = $00006605; // Return fs refnum
FIOSETEOF = $00006606; // Set file length
TIOFLUSH = $00007408; // discard unread input. arg is ignored
function C_open(path: PChar; oflag: C_int): C_int;
external 'StdCLib' name 'open';
function C_close(filedes: C_int): C_int;
external 'StdCLib' name 'close';
function C_write(filedes: C_int; buf: pointer; nbyte: size_t): size_t;
external 'StdCLib' name 'write';
{??? fread returns only when n items has been read. Does not specifically
return after newlines, so cannot be used for reading input from the console.}
function C_read(filedes: C_int; buf: pointer; nbyte: size_t): size_t;
external 'StdCLib' name 'read';
function lseek(filedes: C_int; offset: off_t; whence: C_int): off_t;
external 'StdCLib' name 'lseek';
function ioctl(filedes: C_int; cmd: C_unsigned_int; arg: pointer): C_int;
external 'StdCLib' name 'ioctl';
function remove(filename: PChar): C_int;
external 'StdCLib';
function c_rename(old, c_new: PChar): C_int;
external 'StdCLib' name 'rename';
procedure c_exit(status: C_int);
external 'StdCLib' name 'exit';
var
{Is set to nonzero for MPWTool, zero otherwise.}
StandAlone: C_int; external name 'StandAlone';
CONST
Sys_EPERM = 1; { No permission match }
Sys_ENOENT = 2; { No such file or directory }
Sys_ENORSRC = 3; { Resource not found *}
Sys_EINTR = 4; { System service interrupted *}
Sys_EIO = 5; { I/O error }
Sys_ENXIO = 6; { No such device or address }
Sys_E2BIG = 7; { Insufficient space for return argument * }
Sys_ENOEXEC = 8; { File not executable * }
Sys_EBADF = 9; { Bad file number }
Sys_ECHILD = 10; { No child processes }
Sys_EAGAIN = 11; { Resource temporarily unavailable * }
Sys_ENOMEM = 12; { Not enough space * }
Sys_EACCES = 13; { Permission denied }
Sys_EFAULT = 14; { Illegal filename * }
Sys_ENOTBLK = 15; { Block device required }
Sys_EBUSY = 16; { Device or resource busy }
Sys_EEXIST = 17; { File exists }
Sys_EXDEV = 18; { Cross-device link }
Sys_ENODEV = 19; { No such device }
Sys_ENOTDIR = 20; { Not a directory }
Sys_EISDIR = 21; { Is a directory }
Sys_EINVAL = 22; { Invalid parameter * }
Sys_ENFILE = 23; { File table overflow }
Sys_EMFILE = 24; { Too many open files }
Sys_ENOTTY = 25; { Not a typewriter }
Sys_ETXTBSY = 26; { Text file busy }
Sys_EFBIG = 27; { File too large }
Sys_ENOSPC = 28; { No space left on device }
Sys_ESPIPE = 29; { Illegal seek }
Sys_EROFS = 30; { Read-only file system }
Sys_EMLINK = 31; { Too many links }
Sys_EPIPE = 32; { Broken pipe }
Sys_EDOM = 33; { Math argument out of domain of func }
Sys_ERANGE = 34; { Math result not representable }
{ Note * is slightly different, compared to rtl/sunos/errno.inc}
{$endif}
{******************************************************}
Procedure Errno2InOutRes;
{
Convert ErrNo error to the correct Inoutres value
}
Begin
if errno = 0 then { Else it will go through all the cases }
exit;
//If errno<0 then Errno:=-errno;
case Errno of
Sys_ENFILE,
Sys_EMFILE : Inoutres:=4;
Sys_ENOENT : Inoutres:=2;
Sys_EBADF : Inoutres:=6;
Sys_ENOMEM,
Sys_EFAULT : Inoutres:=217;
Sys_EINVAL : Inoutres:=218;
Sys_EPIPE,
Sys_EINTR,
Sys_EIO,
Sys_EAGAIN,
Sys_ENOSPC : Inoutres:=101;
Sys_ENOTDIR : Inoutres:=3;
Sys_EROFS,
Sys_EEXIST,
Sys_EISDIR,
Sys_EACCES : Inoutres:=5;
Sys_ETXTBSY : Inoutres:=162;
else
InOutRes := Integer(errno);
end;
errno:=0;
end;
{*****************************************************************************
ParamStr/Randomize
*****************************************************************************}
{ number of args }
function paramcount : longint;
begin
{paramcount := argc - 1;}
paramcount:=0;
end;
{ argument number l }
function paramstr(l : longint) : string;
begin
{if (l>=0) and (l+1<=argc) then
paramstr:=strpas(argv[l])
else}
paramstr:='';
end;
{ set randseed to a new pseudo random value }
procedure randomize;
begin
randseed:= Cardinal(TickCount);
end;
{*****************************************************************************
Heap Management
*****************************************************************************}
var
{ Pointer to a block allocated with the MacOS Memory Manager, which
is used as the initial FPC heap. }
theHeap: Mac_Ptr;
intern_heapsize : longint;external name 'HEAPSIZE';
{ first address of heap }
function getheapstart:pointer;
begin
getheapstart:= theHeap;
end;
{ current length of heap }
function getheapsize:longint;
begin
getheapsize:= intern_heapsize ;
end;
{ function to allocate size bytes more for the program }
{ must return the first address of new data space or -1 if fail }
function Sbrk(size : longint):longint;
var
p: Mac_Ptr;
begin
p:= NewPtr(size);
if p = nil then
Sbrk:= -1 //Tell its failed
else
Sbrk:= longint(p)
end;
{ include standard heap management }
{$I heap.inc}
{*****************************************************************************
Low Level File Routines
****************************************************************************}
function do_isdevice(handle:longint):boolean;
begin
do_isdevice:=false;
end;
{ close a file from the handle value }
procedure do_close(h : longint);
begin
{$ifdef MACOS_USE_STDCLIB}
C_close(h);
Errno2InOutRes;
{$else}
InOutRes:=1;
if FSClose(h) = noErr then
InOutRes:=0;
{$endif}
end;
procedure do_erase(p : pchar);
begin
{$ifdef MACOS_USE_STDCLIB}
remove(p);
Errno2InoutRes;
{$else}
InOutRes:=1;
{$endif}
end;
procedure do_rename(p1,p2 : pchar);
begin
{$ifdef MACOS_USE_STDCLIB}
c_rename(p1,p2);
Errno2InoutRes;
{$else}
InOutRes:=1;
{$endif}
end;
function do_write(h,addr,len : longint) : longint;
begin
{$ifdef MACOS_USE_STDCLIB}
do_write:= C_write(h, pointer(addr), len);
Errno2InoutRes;
{$else}
InOutRes:=1;
if FSWrite(h, len, Mac_Ptr(addr)) = noErr then
InOutRes:=0;
do_write:= len;
{$endif}
end;
function do_read(h,addr,len : longint) : longint;
var
i: Longint;
begin
{$ifdef MACOS_USE_STDCLIB}
len:= C_read(h, pointer(addr), len);
Errno2InoutRes;
// TEMP BUGFIX Exchange CR to LF.
for i:= 0 to len-1 do
if SignedBytePtr(ord(addr) + i)^ = 13 then
SignedBytePtr(ord(addr) + i)^ := 10;
do_read:= len;
{$else}
InOutRes:=1;
if FSread(h, len, Mac_Ptr(addr)) = noErr then
InOutRes:=0;
do_read:= len;
{$endif}
end;
function do_filepos(handle : longint) : longint;
var
pos: Longint;
begin
{$ifdef MACOS_USE_STDCLIB}
{This returns the filepos without moving it.}
do_filepos := lseek(handle, 0, SEEK_CUR);
Errno2InoutRes;
{$else}
InOutRes:=1;
if GetFPos(handle, pos) = noErr then
InOutRes:=0;
do_filepos:= pos;
{$endif}
end;
procedure do_seek(handle,pos : longint);
begin
{$ifdef MACOS_USE_STDCLIB}
lseek(handle, pos, SEEK_SET);
Errno2InoutRes;
{$else}
InOutRes:=1;
if SetFPos(handle, fsFromStart, pos) = noErr then
InOutRes:=0;
{$endif}
end;
function do_seekend(handle:longint):longint;
begin
{$ifdef MACOS_USE_STDCLIB}
lseek(handle, 0, SEEK_END);
Errno2InoutRes;
{$else}
InOutRes:=1;
if SetFPos(handle, fsFromLEOF, 0) = noErr then
InOutRes:=0;
{$endif}
end;
function do_filesize(handle : longint) : longint;
var
aktfilepos: Longint;
begin
{$ifdef MACOS_USE_STDCLIB}
aktfilepos:= lseek(handle, 0, SEEK_CUR);
if errno = 0 then
begin
do_filesize := lseek(handle, 0, SEEK_END);
Errno2InOutRes; {Report the error from this operation.}
lseek(handle, aktfilepos, SEEK_SET); {Always try to move back,
even in presence of error.}
end
else
Errno2InOutRes;
{$else}
InOutRes:=1;
if GetEOF(handle, pos) = noErr then
InOutRes:=0;
do_filesize:= pos;
{$endif}
end;
{ truncate at a given position }
procedure do_truncate (handle,pos:longint);
begin
{$ifdef MACOS_USE_STDCLIB}
ioctl(handle, FIOSETEOF, pointer(pos));
Errno2InoutRes;
{$else}
InOutRes:=1;
do_seek(handle,pos); //TODO: Is this needed (Does the user anticipate the filemarker is at the end?)
if SetEOF(handle, pos) = noErr then
InOutRes:=0;
{$endif}
end;
{$ifndef MACOS_USE_STDCLIB}
function FSpLocationFromFullPath(fullPathLength: Integer;
fullPath: Mac_Ptr; var spec: FSSpec ):OSErr;
var
alias: AliasHandle;
res: OSErr;
wasChanged: Boolean;
nullString: Str32;
begin
nullString:= '';
res:= NewAliasMinimalFromFullPath(fullPathLength,
fullPath, nullString, nullString, alias);
if res = noErr then
begin
res:= ResolveAlias(nil, alias, spec, wasChanged);
DisposeHandle(Mac_Handle(alias));
end;
FSpLocationFromFullPath:= res;
end;
{$endif}
procedure do_open(var f;p:pchar;flags:longint);
{
filerec and textrec have both handle and mode as the first items so
they could use the same routine for opening/creating.
when (flags and $100) the file will be append
when (flags and $1000) the file will be truncate/rewritten
when (flags and $10000) there is no check for close (needed for textfiles)
}
var
spec: FSSpec;
creator, fileType: OSType;
scriptTag: ScriptCode;
refNum: Integer;
res: OSErr;
fh: Longint;
oflags : longint;
Const
fsCurPerm = 0;
smSystemScript = -1;
begin
// AllowSlash(p);
{ close first if opened }
if ((flags and $10000)=0) then
begin
case filerec(f).mode of
fminput,fmoutput,fminout : Do_Close(filerec(f).handle);
fmclosed : ;
else
begin
{not assigned}
inoutres:=102;
exit;
end;
end;
end;
{ reset file handle }
filerec(f).handle:=UnusedHandle;
{$ifdef MACOS_USE_STDCLIB}
{ We do the conversion of filemodes here, concentrated on 1 place }
case (flags and 3) of
0 : begin
oflags :=O_RDONLY;
filerec(f).mode:=fminput;
end;
1 : begin
oflags :=O_WRONLY;
filerec(f).mode:=fmoutput;
end;
2 : begin
oflags :=O_RDWR;
filerec(f).mode:=fminout;
end;
end;
if (flags and $1000)=$1000 then
oflags:=oflags or (O_CREAT or O_TRUNC)
else if (flags and $100)=$100 then
oflags:=oflags or (O_APPEND);
{ empty name is special }
if p[0]=#0 then
begin
case FileRec(f).mode of
fminput :
FileRec(f).Handle:=StdInputHandle;
fminout, { this is set by rewrite }
fmoutput :
FileRec(f).Handle:=StdOutputHandle;
fmappend :
begin
FileRec(f).Handle:=StdOutputHandle;
FileRec(f).mode:=fmoutput; {fool fmappend}
end;
end;
exit;
end;
fh:= C_open(p, oflags);
//TODO Perhaps handle readonly filesystems, as in sysunix.inc
Errno2InOutRes;
if fh <> -1 then
filerec(f).handle:= fh
else
filerec(f).handle:= UnusedHandle;
{$else}
InOutRes:=1;
//creator:= $522A6368; {'MPS ' -- MPW}
//creator:= $74747874; {'ttxt'}
creator:= $522A6368; {'R*ch' -- BBEdit}
fileType:= $54455854; {'TEXT'}
{ reset file handle }
filerec(f).handle:=UnusedHandle;
res:= FSpLocationFromFullPath(StrLen(p), p, spec);
if (res = noErr) or (res = fnfErr) then
begin
if FSpCreate(spec, creator, fileType, smSystemScript) = noErr then
;
if FSpOpenDF(spec, fsCurPerm, refNum) = noErr then
begin
filerec(f).handle:= refNum;
InOutRes:=0;
end;
end;
if (filerec(f).handle=UnusedHandle) then
begin
//errno:=GetLastError;
//Errno2InoutRes;
end;
{$endif}
end;
{*****************************************************************************
UnTyped File Handling
*****************************************************************************}
{$i file.inc}
{*****************************************************************************
Typed File Handling
*****************************************************************************}
{$i typefile.inc}
{*****************************************************************************
Text File Handling
*****************************************************************************}
{ should we consider #26 as the end of a file ? }
{?? $DEFINE EOF_CTRLZ}
{$i text.inc}
{*****************************************************************************
Directory Handling
*****************************************************************************}
procedure mkdir(const s:string);[IOCheck];
begin
InOutRes:=1;
end;
procedure rmdir(const s:string);[IOCheck];
begin
InOutRes:=1;
end;
procedure chdir(const s:string);[IOCheck];
begin
InOutRes:=1;
end;
procedure GetDir (DriveNr: byte; var Dir: ShortString);
begin
InOutRes := 1;
end;
{*****************************************************************************
SystemUnit Initialization
*****************************************************************************}
procedure setup_arguments;
begin
end;
procedure setup_environment;
begin
end;
{*****************************************************************************
System Dependent Exit code
*****************************************************************************}
Procedure system_exit;
begin
{$ifndef MACOS_USE_STDCLIB}
if StandAlone <> 0 then
ExitToShell;
{$else}
c_exit(exitcode); //exitcode is only utilized by an MPW tool
{$endif}
end;
procedure SysInitStdIO;
begin
{ Setup stdin, stdout and stderr }
{$ifdef MACOS_USE_STDCLIB}
OpenStdIO(Input,fmInput,StdInputHandle);
OpenStdIO(Output,fmOutput,StdOutputHandle);
OpenStdIO(StdOut,fmOutput,StdOutputHandle);
OpenStdIO(StdErr,fmOutput,StdErrorHandle);
{$endif }
end;
begin
if false then //To save it from the dead code stripper
begin
//Included only to make them available for debugging in asm.
Debugger;
DebugStr('');
end;
{ To be set if this is a GUI or console application }
IsConsole := TRUE;
{ To be set if this is a library and not a program }
IsLibrary := FALSE;
StackLength := InitialStkLen;
StackBottom := SPtr - StackLength;
{ Setup heap }
if Mac_FreeMem - intern_heapsize < 30000 then
Halt(3);
theHeap:= NewPtr(intern_heapsize);
if theHeap = nil then
Halt(3); //According to MPW
InitHeap;
SysInitStdIO;
{ Setup environment and arguments }
Setup_Environment;
setup_arguments;
{ Reset IO Error }
InOutRes:=0;
errno:=0;
{$ifdef HASVARIANT}
initvariantmanager;
{$endif HASVARIANT}
end.
{
$Log$
Revision 1.6 2003-09-12 12:45:15 olle
+ filehandling complete
+ heaphandling complete
+ support for random
* filehandling now uses filedecriptors in StdCLib
* other minor changes
- removed DEFINE MAC_SYS_RUNNABLE
Revision 1.5 2003/01/13 17:18:55 olle
+ added support for rudimentary file handling
Revision 1.4 2002/11/28 10:58:02 olle
+ added support for rudimentary heap
Revision 1.3 2002/10/23 15:29:09 olle
+ added switch MAC_SYS_RUNABLE
+ added include of system.h etc
+ added standard globals
+ added dummy hook procedures
Revision 1.2 2002/10/10 19:44:05 florian
* changes from Olle to compile/link a simple program
Revision 1.1 2002/10/02 21:34:31 florian
* first dummy implementation
}