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add read loops to heif and ppm as well 

We were not looping on vips_source_read() in these loaders, so they
could fail when reading from very slow pipes.

See https://github.com/kleisauke/net-vips/issues/101
This commit is contained in:
John Cupitt 2020-11-12 12:11:35 +00:00
parent c0102c5814
commit ff450497ff
2 changed files with 22 additions and 10 deletions
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12
libvips/foreign/heifload.c
View File

@ -963,11 +963,15 @@ vips_foreign_load_heif_read( void *data, size_t size, void *userdata )
{
VipsForeignLoadHeif *heif = (VipsForeignLoadHeif *) userdata;
gint64 result;
while( size > 0 ) {
gint64 result;
result = vips_source_read( heif->source, data, size );
if( result < 0 )
return( -1 );
result = vips_source_read( heif->source, data, size );
if( result <= 0 )
return( -1 );
size -= result;
}
return( 0 );
}

20
libvips/foreign/ppmload.c
View File

@ -458,13 +458,21 @@ vips_foreign_load_ppm_generate_binary( VipsRegion *or,
for( y = 0; y < r->height; y++ ) {
VipsPel *q = VIPS_REGION_ADDR( or, 0, r->top + y );
size_t bytes_read;
size_t n_bytes;
bytes_read = vips_source_read( ppm->source, q, sizeof_line );
if( bytes_read != sizeof_line ) {
vips_error( class->nickname,
"%s", _( "file truncated" ) );
return( -1 );
n_bytes = sizeof_line;
while( n_bytes > 0 ) {
size_t bytes_read;
bytes_read = vips_source_read( ppm->source,
q, sizeof_line );
if( bytes_read == 0 ) {
vips_error( class->nickname,
"%s", _( "file truncated" ) );
return( -1 );
}
n_bytes -= bytes_read;
}
}