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stop dzsave zip write at 4gb

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see https://github.com/jcupitt/libvips/issues/138

not great, but better than producing a corrupt file
This commit is contained in:
John Cupitt 2014-06-25 14:34:13 +01:00
parent d1e082889f
commit a02deb3ac9
3 changed files with 43 additions and 7 deletions
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3
ChangeLog
View File

@ -1,3 +1,6 @@
25/6/14 started 7.40.2
- dzsave write to zip stops at 4gb, thanks bgilbert
24/6/14 started 7.40.1
- revise man.1 pages
- fix vips_guess_prefix()

6
configure.ac
View File

@ -2,7 +2,7 @@
# also update the version number in the m4 macros below
AC_INIT([vips], [7.40.1], [vipsip@jiscmail.ac.uk])
AC_INIT([vips], [7.40.2], [vipsip@jiscmail.ac.uk])
# required for gobject-introspection
AC_PREREQ(2.62)
@ -18,7 +18,7 @@ AC_CONFIG_MACRO_DIR([m4])
# user-visible library versioning
m4_define([vips_major_version], [7])
m4_define([vips_minor_version], [40])
m4_define([vips_micro_version], [1])
m4_define([vips_micro_version], [2])
m4_define([vips_version],
[vips_major_version.vips_minor_version.vips_micro_version])
@ -38,7 +38,7 @@ VIPS_VERSION_STRING=$VIPS_VERSION-`date`
# binary interface changes not backwards compatible?: reset age to 0
LIBRARY_CURRENT=37
LIBRARY_REVISION=5
LIBRARY_REVISION=6
LIBRARY_AGE=0
# patched into include/vips/version.h

37
libvips/foreign/dzsave.c
View File

@ -42,6 +42,8 @@
* 8/5/14
* - set Type on strips so we can convert for save correctly, thanks
* philipgiuliani
* 25/6/14
* - stop on zip write >4gb, thanks bgilbert
*/
/*
@ -163,6 +165,7 @@ typedef struct _VipsGsfDirectory {
* this on cleanup.
*/
GsfOutput *container;
} VipsGsfDirectory;
/* Close all dirs, non-NULL on error.
@ -417,6 +420,11 @@ struct _VipsForeignSaveDz {
* becomes ".jpg".
*/
char *file_suffix;
/* libgsf can't write zip files larger than 4gb. Track bytes written
* here and try to guess when we'll go over.
*/
size_t bytes_written;
};
typedef VipsForeignSaveClass VipsForeignSaveDzClass;
@ -997,12 +1005,14 @@ strip_work( VipsThreadState *state, void *a )
Strip *strip = (Strip *) a;
Layer *layer = strip->layer;
VipsForeignSaveDz *dz = layer->dz;
VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( dz );
VipsImage *x;
VipsImage *t;
void *buf;
size_t len;
GsfOutput *out;
gboolean status;
#ifdef DEBUG_VERBOSE
printf( "strip_work\n" );
@ -1073,13 +1083,36 @@ strip_work( VipsThreadState *state, void *a )
out = tile_name( layer,
state->x / dz->tile_size, state->y / dz->tile_size );
gsf_output_write( out, len, buf );
status = gsf_output_write( out, len, buf );
dz->bytes_written += len;
gsf_output_close( out );
g_object_unref( out );
g_free( buf );
if( !status ) {
g_mutex_unlock( vips__global_lock );
g_free( buf );
vips_error( class->nickname,
"%s", gsf_output_error( out )->message );
return( -1 );
}
/* Allow a 100,000 byte margin. This probably isn't enough: we don't
* include the space zip needs for the index nor anything we are
* outputting apart from the gsf_output_write() above.
*/
if( dz->container == VIPS_FOREIGN_DZ_CONTAINER_ZIP &&
dz->bytes_written > (size_t) UINT_MAX - 100000 ) {
g_mutex_unlock( vips__global_lock );
vips_error( class->nickname,
"%s", _( "output file too large" ) );
return( -1 );
}
g_mutex_unlock( vips__global_lock );
#ifdef DEBUG_VERBOSE
printf( "strip_work: success\n" );