/* @(#) Command; reads the header of a Vasari picture file.
* @(#) Usage: header vasari_file
* @(#)
*
* Copyright: Birkbeck College, History of Art Dept, London, VASARI project.
*
* Author: Nicos Dessipris
* Written on: 17/01/1990
* Modified on : 17/04/1990, 2/6/93 K.Martinez
* 16/6/93 JC
* - now calls im_mmapin instead of bizzare bogosity
* 1/6/95 JC
* - extra field argument for testing particular bits of the header
* 29/10/98 JC
* - now uses im_open()
* 24/5/01 JC
* - uses im_tiff2vips_header() etc., for speed
* 7/5/03 JC
* - uses im_open_header()
* 1/8/05
* - uses new header API, for great smallness
* 4/8/05
* - back to plain im_open() now that's lazy enough for us
* 9/9/05
* - display meta fields in save format, if possible
* 20/9/05
* - new field name "getext" reads extension block
* 24/8/06
* - use GOption, loop over args
* 4/1/07
* - use im_history_get()
* 29/2/08
* - don't stop on error
* 23/7/09
* - ... but do return an error code if anything failed
* 6/11/09
* - added im_history_get(), im_getexp(), im_printdesc() as wrapped
* functions, so "header" is now obsolete
* 27/2/13
* - convert to vips8 API
* 29/6/20
* - allow "stdin" as a filename
*/
/*
This file is part of VIPS.
VIPS is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA
*/
/*
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <vips/intl.h>
#include <stdio.h>
#include <string.h>
#include <locale.h>
#include <vips/vips.h>
#include <vips/internal.h>
#include <vips/debug.h>
static char *main_option_field = NULL;
static gboolean main_option_all = FALSE;
static GOptionEntry main_option[] = {
{ "all", 'a', 0, G_OPTION_ARG_NONE, &main_option_all,
N_( "show all fields" ), NULL },
{ "field", 'f', 0, G_OPTION_ARG_STRING, &main_option_field,
N_( "print value of FIELD (\"getext\" reads extension block, "
"\"Hist\" reads image history)" ),
"FIELD" },
{ NULL }
};
/* A non-fatal error. Print the vips error buffer and continue.
*/
static void
print_error( void )
{
fprintf( stderr, "%s: %s", g_get_prgname(), vips_error_buffer() );
vips_error_clear();
}
static void *
print_field_fn( VipsImage *image, const char *field, GValue *value, void *a )
{
gboolean *many = (gboolean *) a;
char str[256];
VipsBuf buf = VIPS_BUF_STATIC( str );
if( *many &&
image->filename )
printf( "%s: ", image->filename );
printf( "%s: ", field );
vips_buf_appendgv( &buf, value );
printf( "%s\n", vips_buf_all( &buf ) );
return( NULL );
}
/* Print header, or parts of header.
*/
static int
print_header( VipsImage *image, gboolean many )
{
if( !main_option_field ) {
if( image->filename )
printf( "%s: ", image->filename );
vips_object_print_summary( VIPS_OBJECT( image ) );
if( main_option_all )
(void) vips_image_map( image, print_field_fn, &many );
}
else if( strcmp( main_option_field, "getext" ) == 0 ) {
if( vips__has_extension_block( image ) ) {
void *buf;
int size;
if( !(buf =
vips__read_extension_block( image, &size )) )
return( -1 );
printf( "%s", (char *) buf );
g_free( buf );
}
}
else if( strcmp( main_option_field, "Hist" ) == 0 )
printf( "%s", vips_image_get_history( image ) );
else {
char *str;
if( vips_image_get_as_string( image, main_option_field, &str ) )
return( -1 );
printf( "%s\n", str );
g_free( str );
}
return( 0 );
}
int
main( int argc, char *argv[] )
{
GOptionContext *context;
GOptionGroup *main_group;
GError *error = NULL;
int i;
int result;
if( VIPS_INIT( argv[0] ) )
vips_error_exit( "unable to start VIPS" );
textdomain( GETTEXT_PACKAGE );
setlocale( LC_ALL, "" );
/* On Windows, argv is ascii-only .. use this to get a utf-8 version of
* the args.
*/
#ifdef G_OS_WIN32
argv = g_win32_get_command_line();
#endif /*G_OS_WIN32*/
context = g_option_context_new( _( "- print image header" ) );
main_group = g_option_group_new( NULL, NULL, NULL, NULL, NULL );
g_option_group_add_entries( main_group, main_option );
vips_add_option_entries( main_group );
g_option_group_set_translation_domain( main_group, GETTEXT_PACKAGE );
g_option_context_set_main_group( context, main_group );
#ifdef G_OS_WIN32
if( !g_option_context_parse_strv( context, &argv, &error ) )
#else /*!G_OS_WIN32*/
if( !g_option_context_parse( context, &argc, &argv, &error ) )
#endif /*G_OS_WIN32*/
{
if( error ) {
fprintf( stderr, "%s\n", error->message );
g_error_free( error );
}
vips_error_exit( "try \"%s --help\"", g_get_prgname() );
}
g_option_context_free( context );
result = 0;
for( i = 1; argv[i]; i++ ) {
VipsImage *image;
char filename[VIPS_PATH_MAX];
char option_string[VIPS_PATH_MAX];
vips__filename_split8( argv[i], filename, option_string );
if( strcmp( filename, "stdin" ) == 0 ) {
VipsSource *source;
if( !(source = vips_source_new_from_descriptor( 0 )) )
return( -1 );
if( !(image = vips_image_new_from_source( source,
option_string, NULL )) ) {
VIPS_UNREF( source );
return( -1 );
}
VIPS_UNREF( source );
}
else {
if( !(image =
vips_image_new_from_file( argv[i], NULL )) ) {
print_error();
result = 1;
}
}
if( image &&
print_header( image, argv[2] != NULL ) ) {
print_error();
result = 1;
}
if( image )
g_object_unref( image );
}
/* We don't free this on error exit, sadly.
*/
#ifdef G_OS_WIN32
g_strfreev( argv );
#endif /*G_OS_WIN32*/
vips_shutdown();
return( result );
}