rcfile.c

zgv-5.6,一个Linux系统下的图片浏览器(VGA/SVGA)

  fprintf(stderr,"bad or missing arg.\n");
  exit(1);
  }
}


void get_jis(char *arg,void *data)
{
int *jisp=(int *)data;

get_int(arg,data);
if(*jisp<1) *jisp=1;
if(*jisp>3) *jisp=3;
}


void do_allmodesbad(char *arg,void *data)
{
int f;

for(f=0;f<256;f++) cfg.mode_allowed[f]=0;
}


void do_allmodesgood(char *arg,void *data)
{
int f;

/* we still disallow ones it hasn't got */
for(f=0;f<=GLASTMODE;f++)
  cfg.mode_allowed[f]=vga_hasmode(f)?1:0;
}


void do_badmode(char *arg,void *data)
{
int f;

if(get_modenumber(arg,&f,0)==-1)
  {
  CONFIG_ERR_PREFIX();
  fprintf(stderr,"bad or unsupported mode.\n");
  exit(1);
  }
cfg.mode_allowed[f]=0;
}


void do_goodmode(char *arg,void *data)
{
int f;

if(get_modenumber(arg,&f,0)==-1)
  {
  CONFIG_ERR_PREFIX();
  fprintf(stderr,"bad or unsupported mode.\n");
  exit(1);
  }
cfg.mode_allowed[f]=1;
}


/* used for both startmode and fs_startmode. */
void do_startmode(char *arg,void *data)
{
int *mp=(int *)data;
int f;
int bpp_force=0;

/* fairly kludgey... */
if(mp==&cfg.fs_startmode)
  bpp_force=8;			/* make sure file-sel modes are 8-bit */

if(get_modenumber(arg,&f,bpp_force)==-1)
  {
  CONFIG_ERR_PREFIX();
  fprintf(stderr,"bad or unsupported mode.\n");
  exit(1);
  }
*mp=f;
}


void do_warn(char *arg,void *data)
{
char *ptr=(char *)data;

CONFIG_ERR_PREFIX();
fprintf(stderr,
        "warning: the `%s' option is obsolete,\n"
        "\t\t\tand is being ignored.\n",
        ptr);
}


/* returns mode number which matches x,y,bpp or -1 if none did.
 * put `-1' in x,y or bpp to wildcard them.
 *
 * maybe this routine should be somewhere else?
 */
int modematch(int x,int y,int bpp)
{
int numcols,f;
vga_modeinfo *vminfo;

if((bpp>24)||(bpp==2))
  /* they must have used numcols, not bpp. hmm, let 'em get away with it. */
  numcols=bpp;
else
  numcols=(1<<bpp);

/* we check 0 - 255 at the most */
for(f=0;f<256;f++)
  {
  vminfo=vga_getmodeinfo(f);
  if(vminfo!=NULL)
    if(((x==-1)||(x==vminfo->width))&&
       ((y==-1)||(y==vminfo->height))&&
       ((numcols==-1)||(numcols==vminfo->colors)))
      break;
  }

if(f<255)
  return(f);
else
  return(-1);
}


int parsecommandline(int argc,char *argv[])
{
const char *name;	/* const needed because of struct option declaration */
int entry,ret,f,c,namec,found;

do
  {
  /* the GNU libc docs don't make it clear whether optarg is set to NULL
   * when a *short* option doesn't have an arg, so I play it safe here.
   */
  optarg=NULL;
  
  /* SHORTOPT_STRING is defined in rcfile_short.h, as gen'd from options.src */
  ret=getopt_long(argc,argv,SHORTOPT_STRING,long_opts,&entry);
  
  if(ret=='?')
    {
    /* no need for error message, it's already been done */
    exit(1);
    }
  
  if(ret!=-1)
    {
    /* if we have a short option, it returns char code; find relevant
     * long-option entry. It also returns char code for long options
     * with equivalent short option - it doesn't hurt to look
     * it up in that case as well though. It's not like this takes huge
     * amounts of CPU... ;-)
     */
    if(isalnum(ret))
      {
      found=0;
      
      for(f=0;long_opts[f].name;f++)
        {
        if(long_opts[f].val==ret)
          {
          entry=f;
          found=1;
          break;
          }
        }
      
      if(!found)
        {
        fprintf(stderr,
                "short option not found in long_opts[] - can't happen!\n");
        continue;
        }
      }
    
    /* now we have a valid entry in long_opts[], lookup name in
     * cfglookup to get funcptr/dataptr and run the function.
     */
    name=long_opts[entry].name;
    namec=*name;
    found=0;
    
    for(f=0;(c=cfglookup[f].name[0]);f++)
      if(namec==c && strcmp(name,cfglookup[f].name)==0)
        {
        (*cfglookup[f].funcptr)(optarg,cfglookup[f].dataptr);
        found=1;
        break;
        }
    
    if(!found)
      fprintf(stderr,
              "long option not found in cfglookup[] - can't happen!\n");
    }
  }
while(ret!=-1);

return(argc-optind);
}


void print_version(char *arg,void *dataptr)
{
printf("zgv " ZGV_VER "\n");
exit(0);
}


void usage_help(char *arg,void *dataptr)
{
printf("zgv " ZGV_VER
	" - copyright (C) 1993-2001 Russell Marks.\n\n");
puts("usage: zgv [options] [dir | file ...]\n"
"\n"
"   -A	--auto-animate\n"
"			automatically animate multiple-image GIFs.\n"
"			This greatly limits how such images can be viewed,\n"
"			but can be useful for slideshows.\n"
"	--auto-mode-fit\n"
"			automatically switch modes to suit image size.\n"
"   -p	--avoid-single-progress\n"
"			don't show progress indicator when loading a\n"
"			single file from the command-line.\n"
"	--black-background\n"
"			try to use a black background in the viewer when\n"
"			displaying an 8-bit image.\n"
"   -b	--block-cursor	use a blocky outline cursor, which is rather\n"
"			unsubtle but more obvious.\n"
"	--brightness adjust_val\n"
"			specify how much to add to colour values to\n"
"			change brightness (default 0).\n"
"	--centre		(or --center)\n"
"			(normally enabled, use --centre=off to disable)\n"
"			if *disabled*, don't centre images onscreen.\n"
"	--clear-screen-on-exit\n"
"			clear text console's contents on exit.\n"
"	--col-black \"r g b\"\n"
"			set colour used for `black' (text) in selector;\n"
"			RGB values should be in the range 0-63 for this\n"
"			and the other colour settings below, and the\n"
"			three numbers should be quoted as shown.\n"
"	--col-dark \"r g b\"\n"
"			set colour used for lowlights in selector.\n"
"	--col-light \"r g b\"\n"
"			set colour used for highlights in selector.\n"
"	--col-medium \"r g b\"\n"
"			set colour used for background in selector.\n"
"	--col-tagged \"r g b\"\n"
"			set colour used for tagged files in selector.\n"
"	--contrast multiplier\n"
"			specify how much to multiply colour values by\n"
"			to change contrast (default 1.0).\n"
"	--delete-single-prompt\n"
"			(normally enabled, use --delete-single-prompt=off to\n"
"			disable) if *disabled*, don't prompt for confirmation\n"
"			when deleting a single file (with the Delete key).\n"
"	--delete-tagged-prompt\n"
"			(normally enabled, use --delete-tagged-prompt=off to\n"
"			disable) if *disabled*, don't prompt for confirmation\n"
"			when deleting tagged files (with `D').\n"
"	--dither-16col-fast\n"
"			(normally enabled, use --dither-16col-fast=off to\n"
"			disable) if *disabled*, use (much) slower but\n"
"			more accurate dithering in the viewer's 16-colour\n"
"			mode.\n"
"	--fake-cols	(normally enabled, use --fake-cols=off to disable)\n"
"			if *disabled*, don't fake extra greyscales and\n"
"			colour depth in 8-bit modes.\n"
"	--force-fs-16col\n"
"			force the use of 16-colour mode for the selector.\n"
"   -j	--force-viewer-8bit\n"
"			force all images to be loaded as 8-bit. Normally\n"
"			zgv will load 24-bit images (e.g. colour JPEGs)\n"
"			as 24-bit if you have any modes capable of\n"
"			displaying it in 15, 16, 24, or 32-bit colour.\n"
"	--fs-16col-colour-thumbnails	(or --fs-16col-color-thumbnails)\n"
"			if using 16-colour mode for the selector,\n"
"			show dithered colour thumbnails (rather than mono).\n"
"	--fs-ignore-old-pos\n"
"			don't recall previous cursor position in a\n"
"			directory when returning to it later.\n"
"	--fs-magic	use a slow, but precise (magic-number-based)\n"
"			method to identify picture files to list\n"
"			in the selector.\n"
"	--fs-perfect-cols\n"
"			don't tweak thumbnail colours to make the rest of\n"
"			the selector look right.\n"
"	--fs-slow-thumbnail-update\n"
"			show current cursor position at all times when\n"
"			updating thumbnails, which in most cases will\n"
"			make it markedly slower.\n"
"	--fs-small-text\n"
"			use smaller text than usual in the selector.\n"
"	--fs-start-mode modespec\n"
"			specify initial mode for the selector; the `modespec'\n"
"			should be the width, height, and depth in\n"
"			quotes, e.g. \"640 480 8\". Note that the depth\n"
"			specified is actually ignored (and forced to 8).\n"
"   -t	--fs-thick-text\n"
"			use bold text in selector, which may be useful\n"
"			for those with mildly impaired vision (especially\n"
"			when combined with the `-b' option).\n"
"   -G	--gamma val	set gamma adjustment. The default is 1.0, i.e.\n"
"			no adjustment. (See info file or man page for\n"
"			details, and a discussion of gamma issues.)\n"
"	--gnulitically-correct\n"
"			GNU has POSIXLY_CORRECT for compatibility with\n"
"			silly POSIX misfeatures, and zgv has...\n"
"   -i	--ignore-errors\n"
"			when loading a single file from the command-line,\n"
"			ignore (some) errors.\n"
"	--jpeg-index-style style\n"
"			specify how to read JPEGs when creating\n"
"			thumbnails (default 2):\n"
"			  1 = the quickest (but this sometimes generates\n"
"			      rather fuzzy/blocky thumbnails);\n"
"			  2 = fairly cautious, but still quite fast;\n"
"			  3 = an extremely cautious and slow method.\n"
"   -J	--jpeg-speed type\n"
"			set JPEG speed/quality tradeoff (default 2):\n"
"			  1 = floating-point - slow but accurate;\n"
"			  2 = slow integer - faster but not as accurate;\n"
"			  3 = fast integer - fastest but least accurate.\n"
"   -h	--help		give this usage help.\n"
"	--line-text	use old line-based text.\n"
"   -M	--mouse		enable mouse support; this uses svgalib's mouse\n"
"			configuration, see the libvga.config(5) man page\n"
"			for details.\n"
"	--mouse-scale scale\n"
"			set the ratio of `mouse pixels' to onscreen pixels.\n"
"			In effect, sets the mouse speed. Defaults to 16.\n"
"	--pcd-res resnum\n"
"			set Photo-CD resolution to use, if support was\n"
"			enabled at compile-time. (See info file/man page\n"
"			for further details.)\n"
"   -g	--pgm-truecol	treat PGM files as 24-bit, ensuring that\n"
"			256 separate greyscales can be shown if a 24-bit\n"
"			mode is available.\n"
"	--reverse-bc-order\n"
"			apply brightness modification before contrast.\n"
"	--revert-orient	(normally enabled, use --revert-orient=off to disable)\n"
"			if *disabled*, orientation (flip/mirror/rotate) state\n"
"			is retained between pictures.\n"
"	--revert-scale	(normally enabled, use --revert-scale=off to disable)\n"
"			if *disabled*, scaling is retained between pictures.\n"
"	--scrollbar	show a scrollbar below the selector.\n"
"	--show-xvpics-dir\n"
"			show any `.xvpics' directory, so you can view\n"
"			thumbnails there even if the pictures they\n"
"			represent have been deleted.\n"
"   -T	--show-tagged	show names of tagged files on exit (they're listed\n"
"			to stdout).\n"
"   -S	--slideshow-delay delay\n"
"			set the delay (in seconds) for which one picture\n"
"			in a slideshow is shown before reading the next.\n"
"			The default is 4.\n"
"   -l	--slideshow-loop\n"
"			loop in slideshows `forever' (until you exit).\n"
"   -R	--slideshow-randomise	(or --slideshow-randomize)\n"
"			randomise order of pictures in slideshows.\n"
"	--viewer-16col-colour	(or --viewer-16col-color)\n"
"			use a dithered colour display (rather than mono)\n"
"			in the viewer's 16-colour mode.\n"
"   -m	--viewer-start-mode modespec\n"
"			specify initial mode for the viewer; the `modespec'\n"
"			should be the width, height, and depth in\n"
"			quotes, e.g. \"640 480 8\".\n"
"	--visual	(normally enabled, use --visual=off to disable)\n"
"			if *disabled*, no thumbnails are shown.\n"
"   -k	--vkludge	smooth image when zoom mode is reducing a\n"
"			picture to fit the screen, and when in virtual\n"
"			modes.\n"
"	--version	report version number.\n"
"	--xzgv-keys	remap keys to (mostly) match those used in xzgv.\n"
"   -z	--zoom		fit picture to the full screen size, whatever the\n"
"			picture's actual size.\n"
"	--zoom-reduce-only\n"
"			when zooming, only *reduce* pictures to fit; i.e.\n"
"			make big pictures viewable all-at-once while leaving\n"
"			small pictures intact.\n"
"\n"
"	dir		start zgv on a certain directory.\n"
"	file ...	view (only) the file(s) specified. If more than\n"
"			one file is given, the files are viewed as a\n"
"			slideshow.\n"
"\n"
"All options are processed after any ~/.zgvrc or /etc/zgv.conf file.\n"
"Most long options (minus the `--') can used in either file with e.g.\n"
"`zoom on'. (But be sure to omit any quoting mentioned above in config\n"
"files.)\n"
"\n"
"On/off settings (such as zoom) are enabled by e.g. `-z' or `--zoom';\n"
"however, the long-option form `--option=off' can be used to disable\n"
"them (needed when they are enabled by default - revert-scale, for\n"
"example - or to override them being enabled in a config file).\n"
"\n"
"(This syntax actually lets you both disable *and* enable options,\n"
"using (for the arg after `=') on/off, y/n, yes/no, or 1/0.)");

if(isatty(1))
  printf("\n"
         "If this ridiculously long help text has just flown past :-), try\n"
         "`zgv -h |less' or similar.\n");

exit(0);
}