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{
Copyright (c) 2013-2016 by Free Pascal development team
This unit implements the loading and searching of package files
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
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. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit fpcp;
{$i fpcdefs.inc}
interface
uses
cclasses,cstreams,
globtype,
pcp,finput,fpkg;
type
tpcppackage=class(tpackage)
private
loaded : boolean;
pcpfile : tpcpfile;
private
function openpcp:boolean;
function search_package(ashortname:boolean):boolean;
function search_package_file:boolean;
procedure setfilename(const fn:string;allowoutput:boolean);
procedure writecontainernames;
procedure writecontainedunits;
procedure writerequiredpackages;
procedure writepputable;
procedure writeppudata;
procedure readcontainernames;
procedure readcontainedunits;
procedure readrequiredpackages;
procedure readpputable;
public
constructor create(const pn:string);
destructor destroy; override;
procedure loadpcp;
procedure savepcp;
function getmodulestream(module:tmodulebase):tcstream;
procedure initmoduleinfo(module:tmodulebase);
procedure addunit(module:tmodulebase);
procedure add_required_package(pkg:tpackage);
end;
implementation
uses
sysutils,
cfileutl,cutils,
systems,globals,version,
verbose,
ppu,
entfile,pkgutil;
{ tpcppackage }
function tpcppackage.openpcp: boolean;
var
pcpfiletime : longint;
begin
result:=false;
Message1(package_t_pcp_loading,pcpfilename);
{ Get pcpfile time (also check if the file exists) }
pcpfiletime:=getnamedfiletime(pcpfilename);
if pcpfiletime=-1 then
exit;
{ Open the pcpfile }
Message1(package_u_pcp_name,pcpfilename);
pcpfile:=tpcpfile.create(pcpfilename);
if not pcpfile.openfile then
begin
pcpfile.free;
pcpfile:=nil;
Message(package_u_pcp_file_too_short);
exit;
end;
{ check for a valid PPU file }
if not pcpfile.checkpcpid then
begin
pcpfile.free;
pcpfile:=nil;
Message(package_u_pcp_invalid_header);
exit;
end;
{ check for allowed PCP versions }
if not (pcpfile.getversion=CurrentPCPVersion) then
begin
Message1(package_u_pcp_invalid_version,tostr(pcpfile.getversion));
pcpfile.free;
pcpfile:=nil;
exit;
end;
{ check the target processor }
if tsystemcpu(pcpfile.header.common.cpu)<>target_cpu then
begin
pcpfile.free;
pcpfile:=nil;
Message(package_u_pcp_invalid_processor);
exit;
end;
{ check target }
if tsystem(pcpfile.header.common.target)<>target_info.system then
begin
pcpfile.free;
pcpfile:=nil;
Message(package_u_pcp_invalid_target);
exit;
end;
{$ifdef cpufpemu}
{ check if floating point emulation is on?
fpu emulation isn't unit levelwise because it affects calling convention }
if ((uf_fpu_emulation and pcpfile.header.common.flags)<>0) <>
(cs_fp_emulation in current_settings.moduleswitches) then
begin
pcpfile.free;
pcpfile:=nil;
Message(package_u_pcp_invalid_fpumode);
exit;
end;
{$endif cpufpemu}
{ Show Debug info }
Message1(package_u_pcp_time,filetimestring(pcpfiletime));
Message1(package_u_pcp_flags,tostr(pcpfile.header.common.flags{flags}));
Message1(package_u_pcp_crc,hexstr(pcpfile.header.checksum,8));
(*Message1(package_u_pcp_crc,hexstr(ppufile.header.interface_checksum,8)+' (intfc)');
Message1(package_u_pcp_crc,hexstr(ppufile.header.indirect_checksum,8)+' (indc)');
Comment(V_used,'Number of definitions: '+tostr(ppufile.header.deflistsize));
Comment(V_used,'Number of symbols: '+tostr(ppufile.header.symlistsize));
do_compile:=false;*)
result:=true;
end;
function tpcppackage.search_package(ashortname:boolean):boolean;
var
singlepathstring,
filename : TCmdStr;
function package_exists(const ext:string;var foundfile:TCmdStr):boolean;
begin
if CheckVerbosity(V_Tried) then
Message1(package_t_packagesearch,Singlepathstring+filename+ext);
result:=FindFile(filename+ext,singlepathstring,true,foundfile);
end;
function package_search_path(const s:TCmdStr):boolean;
var
found : boolean;
hs : TCmdStr;
begin
found:=false;
singlepathstring:=FixPath(s,false);
{ Check for package file }
{ TODO }
found:=package_exists({target_info.pkginfoext}'.pcp',hs);
if found then
begin
setfilename(hs,false);
found:=openpcp;
end;
result:=found;
end;
function search_path_list(list:TSearchPathList):boolean;
var
hp : TCmdStrListItem;
found : boolean;
begin
found:=false;
hp:=TCmdStrListItem(list.First);
while assigned(hp) do
begin
found:=package_search_path(hp.Str);
if found then
break;
hp:=TCmdStrListItem(hp.next);
end;
result:=found;
end;
begin
filename:=packagename^;
result:=search_path_list(packagesearchpath);
end;
function tpcppackage.search_package_file: boolean;
var
found : boolean;
begin
found:=false;
if search_package(false) then
found:=true;
if not found and
(length(packagename^)>8) and
search_package(true) then
found:=true;
result:=found;
end;
procedure tpcppackage.setfilename(const fn:string;allowoutput:boolean);
var
p,n : tpathstr;
begin
p:=FixPath(ExtractFilePath(fn),false);
n:=FixFileName(ChangeFileExt(ExtractFileName(fn),''));
{ pcp name }
if allowoutput then
if (OutputUnitDir<>'') then
p:=OutputUnitDir
else
if (OutputExeDir<>'') then
p:=OutputExeDir;
pcpfilename:=p+n+{target_info.pkginfoext}'.pcp';
end;
procedure tpcppackage.writecontainernames;
begin
pcpfile.putstring(pplfilename);
//pcpfile.putstring(ppafilename);
pcpfile.writeentry(ibpackagefiles);
end;
procedure tpcppackage.writecontainedunits;
var
p : pcontainedunit;
i : longint;
begin
pcpfile.putlongint(containedmodules.count);
pcpfile.writeentry(ibstartcontained);
{ for now we write the unit name and the ppu file name }
for i:=0 to containedmodules.count-1 do
begin
p:=pcontainedunit(containedmodules.items[i]);
pcpfile.putstring(p^.module.modulename^);
pcpfile.putstring(p^.ppufile);
end;
pcpfile.writeentry(ibendcontained);
end;
procedure tpcppackage.writerequiredpackages;
var
i : longint;
begin
pcpfile.putlongint(requiredpackages.count);
pcpfile.writeentry(ibstartrequireds);
for i:=0 to requiredpackages.count-1 do
begin
pcpfile.putstring(requiredpackages.NameOfIndex(i));
end;
pcpfile.writeentry(ibendrequireds);
end;
procedure tpcppackage.writepputable;
var
module : pcontainedunit;
i : longint;
begin
{ no need to write the count again; it's the same as for the contained units }
for i:=0 to containedmodules.count-1 do
begin
module:=pcontainedunit(containedmodules[i]);
pcpfile.putlongint(module^.offset);
pcpfile.putlongint(module^.size);
end;
pcpfile.writeentry(ibpputable);
end;
procedure tpcppackage.writeppudata;
const
align: array[0..15] of byte = (0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0);
var
i,
pos,
rem : longint;
module : pcontainedunit;
stream : TCStream;
begin
pcpfile.flush;
for i:=0 to containedmodules.count-1 do
begin
module:=pcontainedunit(containedmodules[i]);
pos:=pcpfile.position;
{ align to 16 byte so that it can be nicely viewed in hex editors;
maybe we could also use 512 byte alignment instead }
rem:=$f-(pos and $f);
pcpfile.stream.write(align[0],rem+1);
pcpfile.flush;
module^.offset:=pcpfile.position;
{ retrieve substream for the current position }
stream:=pcpfile.substream(module^.offset,-1);
rewriteppu(module^.module.ppufilename,stream);
module^.size:=stream.position;
stream.free;
end;
pos:=pcpfile.position;
{ align to 16 byte so that it can be nicely viewed in hex editors;
maybe we could also use 512 byte alignment instead }
rem:=$f-(pos and $f);
pcpfile.stream.write(align[0],rem+1);
end;
procedure tpcppackage.readcontainernames;
begin
if pcpfile.readentry<>ibpackagefiles then
begin
message(package_f_pcp_read_error);
internalerror(2020100818);
end;
pplfilename:=pcpfile.getstring;
message1(package_u_ppl_filename,pplfilename);
end;
procedure tpcppackage.readcontainedunits;
var
cnt,i : longint;
name,path : string;
p : pcontainedunit;
begin
if pcpfile.readentry<>ibstartcontained then
begin
message(package_f_pcp_read_error);
internalerror(2020100819);
end;
cnt:=pcpfile.getlongint;
if pcpfile.readentry<>ibendcontained then
begin
message(package_f_pcp_read_error);
internalerror(2020100820);
end;
for i:=0 to cnt-1 do
begin
name:=pcpfile.getstring;
path:=pcpfile.getstring;
new(p);
p^.module:=nil;
p^.ppufile:=path;
p^.offset:=0;
p^.size:=0;
containedmodules.add(name,p);
message1(package_u_contained_unit,name);
end;
end;
procedure tpcppackage.readrequiredpackages;
var
cnt,i : longint;
name : string;
begin
if pcpfile.readentry<>ibstartrequireds then
begin
message(package_f_pcp_read_error);
internalerror(2014110901);
end;
cnt:=pcpfile.getlongint;
if pcpfile.readentry<>ibendrequireds then
begin
message(package_f_pcp_read_error);
internalerror(2014110902);
end;
for i:=0 to cnt-1 do
begin
name:=pcpfile.getstring;
requiredpackages.add(name,nil);
message1(package_u_required_package,name);
end;
end;
procedure tpcppackage.readpputable;
var
module : pcontainedunit;
i : longint;
begin
if pcpfile.readentry<>ibpputable then
begin
message(package_f_pcp_read_error);
internalerror(2015103001);
end;
for i:=0 to containedmodules.count-1 do
begin
module:=pcontainedunit(containedmodules[i]);
module^.offset:=pcpfile.getlongint;
module^.size:=pcpfile.getlongint;
end;
end;
constructor tpcppackage.create(const pn: string);
begin
inherited create(pn);
setfilename(pn+'.ppk',true);
end;
destructor tpcppackage.destroy;
begin
pcpfile.free;
inherited destroy;
end;
procedure tpcppackage.loadpcp;
var
newpackagename : string;
begin
if loaded then
exit;
if not search_package_file then
begin
Message1(package_f_cant_find_pcp,realpackagename^);
exit;
end
else
Message1(package_u_pcp_found,realpackagename^);
if not assigned(pcpfile) then
internalerror(2013053101);
if pcpfile.readentry<>ibpackagename then
Message1(package_f_cant_read_pcp,realpackagename^);
newpackagename:=pcpfile.getstring;
if upper(newpackagename)<>packagename^ then
Comment(V_Error,'Package was renamed: '+realpackagename^);
readcontainernames;
readrequiredpackages;
readcontainedunits;
readpputable;
end;
procedure tpcppackage.savepcp;
var
tablepos,
oldpos : longint;
begin
{ create new ppufile }
pcpfile:=tpcpfile.create(pcpfilename);
if not pcpfile.createfile then
Message2(package_f_cant_create_pcp,realpackagename^,pcpfilename);
pcpfile.putstring(realpackagename^);
pcpfile.writeentry(ibpackagename);
writecontainernames;
writerequiredpackages;
writecontainedunits;
{ the offsets and the contents of the ppus are not crc'd }
pcpfile.do_crc:=false;
pcpfile.flush;
tablepos:=pcpfile.position;
{ this will write a table with empty entries }
writepputable;
pcpfile.do_crc:=true;
{ the last entry ibend is written automatically }
{ flush to be sure }
pcpfile.flush;
{ create and write header }
pcpfile.header.common.size:=pcpfile.size;
pcpfile.header.checksum:=pcpfile.crc;
pcpfile.header.common.compiler:=wordversion;
pcpfile.header.common.cpu:=word(target_cpu);
pcpfile.header.common.target:=word(target_info.system);
//pcpfile.header.flags:=flags;
pcpfile.header.ppulistsize:=containedmodules.count;
pcpfile.header.requiredlistsize:=requiredpackages.count;
pcpfile.writeheader;
{ write the ppu table which will also fill the offsets/sizes }
writeppudata;
pcpfile.flush;
oldpos:=pcpfile.position;
{ now write the filled PPU table at the previously stored position }
pcpfile.position:=tablepos;
writepputable;
pcpfile.position:=oldpos;
{ save crc in current module also }
//crc:=pcpfile.crc;
pcpfile.closefile;
pcpfile.free;
pcpfile:=nil;
end;
function tpcppackage.getmodulestream(module:tmodulebase):tcstream;
var
i : longint;
contained : pcontainedunit;
begin
for i:=0 to containedmodules.count-1 do
begin
contained:=pcontainedunit(containedmodules[i]);
if contained^.module=module then
begin
result:=pcpfile.substream(contained^.offset,contained^.size);
exit;
end;
end;
result:=nil;
end;
procedure tpcppackage.initmoduleinfo(module: tmodulebase);
begin
pplfilename:=extractfilename(module.sharedlibfilename);
end;
procedure tpcppackage.addunit(module: tmodulebase);
var
containedunit : pcontainedunit;
begin
new(containedunit);
containedunit^.module:=module;
containedunit^.ppufile:=extractfilename(module.ppufilename);
containedunit^.offset:=0;
containedunit^.size:=0;
containedmodules.add(module.modulename^,containedunit);
end;
procedure tpcppackage.add_required_package(pkg:tpackage);
var
p : tpackage;
begin
p:=tpackage(requiredpackages.find(pkg.packagename^));
if not assigned(p) then
requiredpackages.Add(pkg.packagename^,pkg)
else
if p<>pkg then
internalerror(2015112302);
end;
end.
|