perl-install/resize_fat/c_rewritten.xs


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#include "EXTERN.h"
#include "perl.h"
#include "XSUB.h"

/* set by scan_fat, used by next */
short *fat = NULL;
char *fat_flag_map = NULL;
unsigned int *fat_remap = NULL;
int fat_remap_size;
int type_size, nb_clusters, bad_cluster_value;

void free_all() {
#define FREE(p) if (p) free(p), p = NULL;
  FREE(fat);
  FREE(fat_flag_map);
  FREE(fat_remap);
#undef FREE
}

unsigned int next(unsigned int cluster) {
  short *p = fat + type_size * cluster;
  if (!fat) {
    free_all();
    croak("fat::next: trying to use null pointer");
  }
  if (cluster >= nb_clusters + 2) {
    free_all();
    croak("fat::next: cluster %d outside filesystem", cluster);
  }
  return type_size == 1 ? *p : *((unsigned int *) p);
}

void set_next(unsigned int cluster, unsigned int val) {
  short *p = fat + type_size * cluster;
  if (!fat) {
    free_all();
    croak("fat::set_next: trying to use null pointer");
  }
  if (cluster >= nb_clusters + 2) {
    free_all();
    croak("fat::set_next: cluster %d outside filesystem", cluster);
  }
  type_size == 1 ? *p : *((unsigned int *) p) = val;
}

MODULE = resize_fat::c_rewritten PACKAGE = resize_fat::c_rewritten

PROTOTYPES: DISABLE


void 
read_fat(fd, offset, size, magic)
  int fd
  int offset
  int size
  unsigned char magic
  PPCODE:
{
  fat = (short *) malloc(size);
  if (!fat) {
    free_all();
    croak("read_fat: not enough memory");
  }
  if (lseek(fd, offset, SEEK_SET) != offset ||
      read(fd, fat, size) != size) {
    free_all();
    croak("read_fat: reading FAT failed");
  }
  if (magic != *(unsigned char *) fat) {
    free_all();
    croak("read_fat: FAT has invalid signature");
  }
}

void
write_fat(fd, size)
  int fd
  int size
  PPCODE:
{
  if (write(fd, fat, size) != size) {
    free_all();
    croak("write_fat: write failed");
  }
}

void
free_all()
  PPCODE:
  free_all();

void
scan_fat(nb_clusters_, type_size_)
  int nb_clusters_
  int type_size_
  PPCODE:
{
  unsigned int v;  
  int free = 0, bad = 0, used = 0;
  short *p;
  
  type_size = type_size_; nb_clusters = nb_clusters_;
  bad_cluster_value = type_size == 32 ? 0x0ffffff7 : 0xfff7;

  if (type_size % 16) {
    free_all();
    croak("scan_fat: unable to handle FAT%d", type_size);
  }
  type_size /= 16;

  for (p = fat + 2 * type_size; p < fat + type_size * (nb_clusters + 2); p += type_size) {
    v = type_size == 1 ? *p : *((unsigned int *) p);

    if (v == 0) free++;
    else if (v == bad_cluster_value) bad++;
  }
  used = nb_clusters - free - bad;
  EXTEND(SP, 3);
  PUSHs(sv_2mortal(newSViv(free)));
  PUSHs(sv_2mortal(newSViv(bad)));
  PUSHs(sv_2mortal(newSViv(used)));
}

unsigned int
next(unused, cluster)
  void *unused
  unsigned int cluster
  CODE:
  RETVAL = next(cluster);
  OUTPUT:
  RETVAL

void
set_next(unused, cluster, val)
  void *unused
  unsigned int cluster
  unsigned int val
  CODE:
  set_next(cluster, val);

void
allocate_fat_flag(size)
  int size
  CODE:
  fat_flag_map = calloc(size, 1);
  if (!fat_flag_map) {
    free_all();
    croak("allocate_fat_flag: not enough memory");
  }

int
checkFat(cluster, type, name)
  unsigned int cluster
  int type
  char *name
  CODE:
  int nb = 0;

  if (!fat_flag_map) {
    free_all();
    croak("Bad FAT: trying to use null pointer");
  }
  for (; cluster < bad_cluster_value; cluster = next(cluster)) {
    if (cluster == 0) {
      free_all();
      croak("Bad FAT: unterminated chain for %s\n", name);
    }
    if (cluster >= nb_clusters + 2) {
      free_all();
      croak("Bad FAT: chain outside filesystem for %s\n", name);
    }
    if (fat_flag_map[cluster]) {
      free_all();
      croak("Bad FAT: cluster %d is cross-linked for %s\n", cluster, name);
    }
    fat_flag_map[cluster] = type;
    nb++;
  }
  RETVAL = nb;
  OUTPUT:
  RETVAL

unsigned int
flag(cluster)
  unsigned int cluster
  CODE:
  if (!fat_flag_map) {
    free_all();
    croak("Bad FAT: trying to use null pointer");
  }
  if (cluster >= nb_clusters + 2) {
    free_all();
    croak("Bad FAT: going outside filesystem");
  }
  RETVAL = fat_flag_map[cluster];
  OUTPUT:
  RETVAL

void
set_flag(cluster, flag)
  unsigned int cluster
  int flag
  CODE:
  if (!fat_flag_map) {
    free_all();
    croak("Bad FAT: trying to use null pointer");
  }
  if (cluster >= nb_clusters + 2) {
    free_all();
    croak("Bad FAT: going outside filesystem");
  }
  fat_flag_map[cluster] = flag;

void
allocate_fat_remap(size)
  int size
  CODE:
  fat_remap_size = size;
  fat_remap = (unsigned int *) calloc(size, sizeof(unsigned int *));
  if (!fat_remap) {
    free_all();
    croak("allocate_fat_remap: not enough memory");
  }

unsigned int
fat_remap(cluster)
  unsigned int cluster
  CODE:
  if (!fat_remap) {
    free_all();
    croak("fat_remap: trying to use null pointer");
  }
  if (cluster >= bad_cluster_value) {
    RETVAL = cluster; /* special cases */
  } else {
    if (cluster >= fat_remap_size) {
      free_all();
      croak("fat_remap: cluster %d >= %d in fat_remap", cluster, fat_remap_size);
    }
    RETVAL = fat_remap[cluster];
  }
  OUTPUT:
  RETVAL

void
set_fat_remap(cluster, val)
  unsigned int cluster
  unsigned int val
  CODE:
  if (!fat_remap) {
    free_all();
    croak("set_fat_remap: trying to use null pointer");
  }
  if (cluster >= fat_remap_size) {
    free_all();
    croak("set_fat_remap: cluster %d >= %d in set_fat_remap", cluster, fat_remap_size);
  }
  if (val < bad_cluster_value && val >= fat_remap_size) {
    free_all();
    croak("set_fat_remap: remapping cluster %d to cluster %d >= %d in set_fat_remap", cluster, val, fat_remap_size);
  }
  fat_remap[cluster] = val;
package interactive; # $Id$

use diagnostics;
use strict;

#-######################################################################################
#- misc imports
#-######################################################################################
use MDK::Common::Func;
use common;

#- minimal example using interactive:
#
#- > use lib qw(/usr/lib/libDrakX);
#- > use interactive;
#- > my $in = interactive->vnew;
#- > $in->ask_okcancel('title', 'question');
#- > $in->exit;

#- ask_from_ takes global options ($common):
#-  title                => window title
#-  messages             => message displayed in the upper part of the window
#-  advanced_messages    => message displayed when "Advanced" is pressed
#-  ok                   => force the name of the "Ok"/"Next" button
#-  cancel               => force the name of the "Cancel"/"Previous" button
#-  advanced_label       => force the name of the "Advanced" button
#-  advanced_label_close => force the name of the "Basic" button
#-  advanced_state       => if set to 1, force the "Advanced" part of the dialog to be opened initially
#-  focus_cancel         => force focus on the "Cancel" button
#-  focus_first          => force focus on the first entry
#-  callbacks            => functions called when something happen: complete canceled advanced changed focus_out ok_disabled

#- ask_from_ takes a list of entries with fields:
#-  val      => reference to the value
#-  label    => description
#-  icon     => icon to put before the description
#-  help     => tooltip
#-  advanced => wether it is shown in by default or only in advanced mode
#-  disabled => function returning wether it should be disabled (grayed)
#-  gtk      => gtk preferences
#-  type     => 
#-     button => (with clicked or clicked_may_quit)
#-               (type defaults to button if clicked or clicked_may_quit is there)
#-               (val need not be a reference) (if clicked_may_quit return true, it's as if "Ok" was pressed)
#-     label => (val need not be a reference) (type defaults to label if val is not a reference) 
#-     bool (with "text" or "image" (which overrides text) giving an image filename)
#-     range (with min, max)
#-     combo (with list, not_edit, format)
#-     list (with list, icon2f (aka icon), separator (aka tree), format (aka pre_format function),
#-           help can be a hash or a function,
#-           tree_expanded boolean telling wether the tree should be wide open by default
#-           quit_if_double_click boolean
#-           allow_empty_list disables the special cases for 0 and 1 element lists
#-           image2f is a subroutine which takes a value of the list as parameter, and returns an array (text, image_file_name))
#-     entry (the default) (with hidden)
#
#- heritate from this class and you'll get all made interactivity for same steps.
#- for this you need to provide
#- - ask_from_listW(o, title, messages, arrayref, default) returns one string of arrayref
#-
#- where
#- - o is the object
#- - title is a string
#- - messages is an refarray of strings
#- - default is an optional string (default is in arrayref)
#- - arrayref is an arrayref of strings
#- - arrayref2 contains booleans telling the default state,
#-
#- ask_from_list and ask_from_list_ are wrappers around ask_from_biglist and ask_from_smalllist
#-
#- ask_from_list_ just translate arrayref before calling ask_from_list and untranslate the result
#-
#- ask_from_listW should handle differently small lists and big ones.
#-


#-######################################################################################
#- OO Stuff
#-######################################################################################
sub new($) {
    my ($type) = @_;

    bless {}, ref($type) || $type;
}

sub vnew {
    my ($_type, $su, $icon) = @_;
    $su = $su eq "su";
    if ($ENV{INTERACTIVE_HTTP}) {
	require interactive::http;
	return interactive::http->new;
    }
    require c;
    if ($su) {
	$ENV{PATH} = "/sbin:/usr/sbin:$ENV{PATH}";
	$su = '' if $::testing || $ENV{TESTING};
    }
    require_root_capability() if $su;
    if (check_for_xserver()) {
	eval { require interactive::gtk };
	if (!$@) {
	    my $o = interactive::gtk->new;
	    if ($icon && $icon ne 'default' && !$::isWizard) { $o->{icon} = $icon } else { undef $o->{icon} }
	    return $o;
	}
    }

    require 'log.pm'; #- "require log" causes some pb, perl thinking that "log" is the log() function
    undef *log::l;
    *log::l = sub {}; # otherwise, it will bother us :(
    require interactive::newt;
    interactive::newt->new;
}

sub enter_console {}
sub leave_console {}
sub suspend {}
sub resume {}
sub end {}
sub exit { exit($_[0]) }

#-######################################################################################
#- Interactive functions
#-######################################################################################
sub ask_warn {
    my ($o, $title, $message) = @_;
    ask_warn_($o, { title => $title, messages => $message });
}
sub ask_yesorno {
    my ($o, $title, $message, $def) = @_;
    ask_yesorno_($o, { title => $title, messages => $message }, $def);
}
sub ask_okcancel {
    my ($o, $title, $message, $def) = @_;
    ask_okcancel_($o, { title => $title, messages => $message }, $def);
}

sub ask_warn_ {
    my ($o, $common) = @_;
    ask_from_listf_raw_no_check($o, $common, undef, [ N("Ok") ]);
}

sub ask_yesorno_ {
    my ($o, $common, $def) = @_;
    $common->{cancel} = '';