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#############################################################################
##
#W system.g GAP Library Alexander Hulpke
##
#H @(#)$Id: system.g,v 4.12.2.26 2008/12/16 13:08:34 gapchron Exp $
##
#Y Copyright (C) 1996, Lehrstuhl D fuer Mathematik, RWTH Aachen, Germany
#Y (C) 1998 School Math and Comp. Sci., University of St. Andrews, Scotland
#Y Copyright (C) 2002 The GAP Group
##
## This file contains functions that are architecture dependent,
## and the record `GAPInfo', which collects global variables that are needed
## internally.
##
Revision.system_g :=
"@(#)$Id: system.g,v 4.12.2.26 2008/12/16 13:08:34 gapchron Exp $";
BIND_GLOBAL( "GAPInfo", rec(
# do not edit the following two lines. They get replaced by string matching
# in the distribution wrapper scripts. (Occurrences of `4.dev' and `today'
# get replaced.)
Version := "4.4.12",
Date := "17-Dec-2008",
# The kernel version numbers are expected in the format `<v>.<r>.<p>'.
KernelVersion := KERNEL_VERSION,
NeedKernelVersion := ["4.4.12"],
Architecture := GAP_ARCHITECTURE,
# The exact command line which called GAP as list of strings;
# first entry is the executable followed by the options.
SystemCommandLine := SYSTEM_COMMAND_LINE,
# The shell environment in which GAP was called as list of strings of
# form "var=val".
SystemEnvironment := SYSTEM_ENVIRONMENT,
# paths
RootPaths := GAP_ROOT_PATHS,
UserHome := USER_HOME,
gaprc := GAP_RC_FILE,
DirectoriesLibrary := rec(),
DirectoriesSystemPrograms := DIRECTORIES_SYSTEM_PROGRAMS,
DirectoriesPrograms := false,
DirectoriesTemporary := [],
DirectoryCurrent := false,
# Shall the file `lib/obsolete.g' be read upon initialization?
# (This can be changed in the user's `.gaprc' file.)
ReadObsolete := true,
# the command line options that were given for the current session
CommandLineOptions := rec(),
# the banner that is printed if no `-b' or `-q' option was given
BannerString := "\
\n\
######### ###### ########### ### \n\
############# ###### ############ #### \n\
############## ######## ############# ##### \n\
############### ######## ##### ###### ##### \n\
###### # ######### ##### ##### ###### \n\
###### ########## ##### ##### ####### \n\
##### ##### #### ##### ###### ######## \n\
#### ##### ##### ############# ### #### \n\
##### ####### #### #### ########### #### #### \n\
##### ####### ##### ##### ###### #### #### \n\
##### ####### ##### ##### ##### #############\n\
##### ##### ################ ##### #############\n\
###### ##### ################ ##### #############\n\
################ ################## ##### #### \n\
############### ##### ##### ##### #### \n\
############# ##### ##### ##### #### \n\
######### ##### ##### ##### #### \n\
\n\
Information at: http://www.gap-system.org\n\
Try '?help' for help. See also '?copyright' and '?authors'\n\
\n",
# This holds the maximal number of lines that are reasonably printed
# in `ViewObj' methods.
#T The value can be changed using the function `ViewLength' that is defined
#T in `lib/oper.g' but currently is undocumented.
#T Should it become documented or is it sufficient to document this variable?
ViewLength := 3,
# the maximal number of arguments a method can have
MaxNrArgsMethod:= 6,
) );
GAPInfo.ScanCommandLineOption := function( name, type, default )
if not IsBound( SY_COMMAND_LINE_OPTIONS.( name ) ) then
GAPInfo.CommandLineOptions.( name ):= default;
elif type = "toggle" then
if LEN_LIST( SY_COMMAND_LINE_OPTIONS.( name ) ) mod 2 = 0 then
GAPInfo.CommandLineOptions.( name ):= default;
else
GAPInfo.CommandLineOptions.( name ):= not default;
fi;
elif type = "string" then
# Take the last value for this option.
GAPInfo.CommandLineOptions.( name ):= SY_COMMAND_LINE_OPTIONS.( name )[
LEN_LIST( SY_COMMAND_LINE_OPTIONS.( name ) ) ];
elif type = "strlst" then
# Take all values for this option.
GAPInfo.CommandLineOptions.( name ):= SY_COMMAND_LINE_OPTIONS.( name );
elif type = "modul3" then
# special case for `-g'
GAPInfo.CommandLineOptions.( name ):=
LEN_LIST( SY_COMMAND_LINE_OPTIONS.( name ) ) mod 3;
fi;
end;
GAPInfo.ScanCommandLineOption( "A", "toggle", false );
GAPInfo.ScanCommandLineOption( "B", "string", "" );
GAPInfo.ScanCommandLineOption( "D", "toggle", false );
GAPInfo.ScanCommandLineOption( "E", "toggle", false );
GAPInfo.ScanCommandLineOption( "K", "string", "0" );
GAPInfo.ScanCommandLineOption( "L", "string", "" );
GAPInfo.ScanCommandLineOption( "M", "toggle", false );
GAPInfo.ScanCommandLineOption( "N", "toggle", false );
GAPInfo.ScanCommandLineOption( "O", "toggle", false );
GAPInfo.ScanCommandLineOption( "P", "string", "0" );
GAPInfo.ScanCommandLineOption( "U", "string", "" );
GAPInfo.ScanCommandLineOption( "W", "string", "0" );
GAPInfo.ScanCommandLineOption( "R", "string", "" );
GAPInfo.ScanCommandLineOption( "T", "toggle", false );
GAPInfo.ScanCommandLineOption( "X", "toggle", false );
GAPInfo.ScanCommandLineOption( "Y", "toggle", false );
GAPInfo.ScanCommandLineOption( "a", "string", "0" );
GAPInfo.ScanCommandLineOption( "b", "toggle", false );
GAPInfo.ScanCommandLineOption( "c", "string", "0" );
GAPInfo.ScanCommandLineOption( "e", "toggle", false );
GAPInfo.ScanCommandLineOption( "f", "toggle", false );
GAPInfo.ScanCommandLineOption( "g", "modul3", 0 );
GAPInfo.ScanCommandLineOption( "i", "string", "" );
GAPInfo.ScanCommandLineOption( "l", "strlst", [] );
GAPInfo.ScanCommandLineOption( "m", "string", "24m" );
GAPInfo.ScanCommandLineOption( "n", "toggle", false );
GAPInfo.ScanCommandLineOption( "o", "string", "256m" );
GAPInfo.ScanCommandLineOption( "p", "toggle", false );
GAPInfo.ScanCommandLineOption( "q", "toggle", false );
GAPInfo.ScanCommandLineOption( "r", "toggle", false );
GAPInfo.ScanCommandLineOption( "x", "string", "80" );
GAPInfo.ScanCommandLineOption( "y", "string", "24" );
GAPInfo.ScanCommandLineOption( "z", "string", "20" );
#############################################################################
##
## Administration of Packages
##
#############################################################################
##
#V GAPInfo.PackagesLoaded
##
## This is a mutable record, the component names are the names of those
## packages that are already loaded.
## The component for each package is a list of length three, the entries
## being the path to the {\GAP} root directory that contains the package,
## the package version, and the package name.
## For each package, the value gets bound in the `LoadPackage' call.
##
GAPInfo.PackagesLoaded := rec();
#############################################################################
##
#V GAPInfo.PackagesInfo
##
## This is a mutable record, the component names are the names of those
## packages for which the `PackageInfo.g' files have been read.
## (These packages are not necessarily loaded.)
##
GAPInfo.PackagesInfo := rec();
#############################################################################
##
#V GAPInfo.TestData
##
## This is a mutable record used in files that are read via `ReadTest'.
## These files contain the commands `START_TEST' and `STOP_TEST',
## which set, read, and unbind the components `START_TIME' and `START_NAME'.
## The function `RunStandardTests' also uses a component `results'.
##
GAPInfo.TestData:= rec();
#############################################################################
##
## Remove globals exported by the kernel that are no longer needed.
#T wouldn't it be better to create the record `GAPInfo' with these components
#T in the kernel?
##
for name in [ "KERNEL_VERSION", "GAP_ARCHITECTURE", "GAP_ROOT_PATHS",
"USER_HOME", "GAP_RC_FILE", "DIRECTORIES_SYSTEM_PROGRAMS",
"DEBUG_LOADING" ] do
MAKE_READ_WRITE_GLOBAL( name );
UNBIND_GLOBAL( name );
od;
#############################################################################
##
## identifier that will recognize the Windows and the Mac version
##
BIND_GLOBAL("WINDOWS_ARCHITECTURE",
IMMUTABLE_COPY_OBJ("win"));
BIND_GLOBAL("MACINTOSH_68K_ARCHITECTURE",
IMMUTABLE_COPY_OBJ("MC68020-motorola-macos-mwerksc"));
BIND_GLOBAL("MACINTOSH_PPC_ARCHITECTURE",
IMMUTABLE_COPY_OBJ("PPC-motorola-macos-mwerksc"));
#T the following functions eventually should be more clever. This however
#T will require kernel support and thus is something for later. AH
#############################################################################
##
#F ARCH_IS_MAC()
##
## tests whether {\GAP} is running on a Macintosh under MacOS
BIND_GLOBAL("ARCH_IS_MAC",function()
return GAPInfo.Architecture = MACINTOSH_68K_ARCHITECTURE
or GAPInfo.Architecture = MACINTOSH_PPC_ARCHITECTURE;
end);
#############################################################################
##
#F ARCH_IS_WINDOWS()
##
## tests whether {\GAP} is running on a Windows system.
BIND_GLOBAL("ARCH_IS_WINDOWS",function()
local l;
l:=LEN_LIST( GAPInfo.Architecture );
if l<9 then return false;fi; # trap some unixes with incredibly short
# string name
return GAPInfo.Architecture{[l-6..l-4]} = WINDOWS_ARCHITECTURE;
end);
#############################################################################
##
#F ARCH_IS_UNIX()
##
## tests whether {\GAP} is running on a UNIX system.
BIND_GLOBAL("ARCH_IS_UNIX",function()
return not (ARCH_IS_MAC() or ARCH_IS_WINDOWS());
end);
#############################################################################
##
#V GAPInfo.BytesPerVariable
#V DOUBLE_OBJLEN
##
## `GAPInfo.BytesPerVariable' is the number of bytes used for one `Obj'
## variable.
##
GAPInfo.BytesPerVariable := 4;
# are we a 64 (or more) bit system?
while TNUM_OBJ( 2^((GAPInfo.BytesPerVariable-1)*8) )
= TNUM_OBJ( 2^((GAPInfo.BytesPerVariable+1)*8) ) do
GAPInfo.BytesPerVariable:= GAPInfo.BytesPerVariable + 4;
od;
BIND_GLOBAL( "DOUBLE_OBJLEN", 2*GAPInfo.BytesPerVariable );
#############################################################################
##
#E
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