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fix a crash with 0 length vectors

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This commit is contained in:
John Cupitt 2021-12-16 10:45:10 +00:00
parent 1fe283cc85
commit 65d84d1cbe
2 changed files with 25 additions and 9 deletions
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1
ChangeLog
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@ -2,6 +2,7 @@
- make exif resuint optional and default to inch
- win: don't set create time on inappropriate file descriptors [lovell]
- fall back to magicksave for gif if cgif is not present [erik-frontify]
- fix a crash with 0 length vectors
21/11/21 started 8.12.1
- fix insert [chregu]

33
libvips/iofuncs/error.c
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@ -987,7 +987,8 @@ vips_check_uintorf( const char *domain, VipsImage *im )
int
vips_check_size_same( const char *domain, VipsImage *im1, VipsImage *im2 )
{
if( im1->Xsize != im2->Xsize || im1->Ysize != im2->Ysize ) {
if( im1->Xsize != im2->Xsize ||
im1->Ysize != im2->Ysize ) {
vips_error( domain, "%s", _( "images must match in size" ) );
return( -1 );
}
@ -1157,7 +1158,8 @@ vips_check_vector_length( const char *domain, int n, int len )
* @im: image to check against
*
* Operations with a vector constant need a 1-element vector, or a vector with
* the same number of elements as there are bands in the image.
* the same number of elements as there are bands in the image, or a 1-band
* image and a many-element vector.
*
* See also: vips_error().
*
@ -1166,13 +1168,25 @@ vips_check_vector_length( const char *domain, int n, int len )
int
vips_check_vector( const char *domain, int n, VipsImage *im )
{
if( n != 1 && im->Bands != 1 && n != im->Bands ) {
vips_error( domain,
_( "vector must have 1 or %d elements" ), im->Bands );
return( -1 );
}
/* Here it's clearer to list the cases that are OK.
*/
if( n == im->Bands )
return( 0 );
if( n == 1 )
return( 0 );
if( im->Bands == 1 &&
n > 1 )
return( 0 );
return( 0 );
if( im->Bands == 1 )
vips_error( domain,
"%s", _( "vector must have 1 element" ) );
else
vips_error( domain,
_( "vector must have 1 or %d elements" ),
im->Bands );
return( -1 );
}
/**
@ -1191,7 +1205,8 @@ vips_check_vector( const char *domain, int n, VipsImage *im )
int
vips_check_hist( const char *domain, VipsImage *im )
{
if( im->Xsize != 1 && im->Ysize != 1 ) {
if( im->Xsize != 1 &&
im->Ysize != 1 ) {
vips_error( domain, "%s",
_( "histograms must have width or height 1" ) );
return( -1 );