clean up length return

read file to mem was using uint for length for historical reasons

libvips/colour/colour.c

@@ -277,7 +277,7 @@ static int
 vips_colour_attach_profile( VipsImage *im, const char *filename )
 {
 	char *data;
-	unsigned int data_length;
+	size_t data_length;
 
 	if( !(data = vips__file_read_name( filename, VIPS_ICC_DIR, 
 		&data_length )) ) 

libvips/foreign/analyze2vips.c

@@ -299,7 +299,7 @@ static struct dsr *
 read_header( const char *header )
 {
 	struct dsr *d;
-	unsigned int len;
+	size_t len;
 
 	if( !(d = (struct dsr *) vips__file_read_name( header, NULL, &len )) )
 		return( NULL );

libvips/foreign/vips2jpeg.c

@@ -181,7 +181,7 @@ typedef struct {
         ErrorManager eman;
 	JSAMPROW *row_pointer;
 	char *profile_bytes;
-	unsigned int profile_length;
+	size_t profile_length;
 	VipsImage *inverted;
 } Write;
 

libvips/foreign/vips2tiff.c

@@ -402,7 +402,7 @@ static int
 embed_profile_file( TIFF *tif, const char *profile )
 {
 	char *buffer;
-	unsigned int length;
+	size_t length;
 
 	if( !(buffer = vips__file_read_name( profile, VIPS_ICC_DIR, &length )) )
 		return( -1 );

libvips/foreign/vipspng.c

@@ -857,22 +857,20 @@ write_vips( Write *write, int compress, int interlace, const char *profile )
 	if( profile ) {
 		if( strcmp( profile, "none" ) != 0 ) { 
 			void *data;
-			unsigned int length;
+			size_t length;
 
-			if( !(data = 
-				vips__file_read_name( profile, VIPS_ICC_DIR, 
-				&length )) ) 
+			if( !(data = vips__file_read_name( profile, 
+				VIPS_ICC_DIR, &length )) ) 
 				return( -1 );
 
 #ifdef DEBUG
 			printf( "write_vips: "
-				"attaching %d bytes of ICC profile\n",
+				"attaching %zd bytes of ICC profile\n",
 				length );
 #endif /*DEBUG*/
 
 			png_set_iCCP( write->pPng, write->pInfo, "icc", 
-				PNG_COMPRESSION_TYPE_BASE, 
-				data, length );
+				PNG_COMPRESSION_TYPE_BASE, data, length );
 		}
 	}
 	else if( vips_image_get_typeof( in, VIPS_META_ICC_NAME ) ) {

libvips/include/vips/util.h

@@ -201,9 +201,9 @@ FILE *vips__file_open_read( const char *filename,
 	const char *fallback_dir, gboolean text_mode );
 FILE *vips__file_open_write( const char *filename, 
 	gboolean text_mode );
-char *vips__file_read( FILE *fp, const char *name, unsigned int *length_out );
+char *vips__file_read( FILE *fp, const char *name, size_t *length_out );
 char *vips__file_read_name( const char *name, const char *fallback_dir, 
-	unsigned int *length_out );
+	size_t *length_out );
 int vips__file_write( void *data, size_t size, size_t nmemb, FILE *stream );
 int vips__get_bytes( const char *filename, unsigned char buf[], int len );
 

libvips/iofuncs/util.c

@@ -620,7 +620,7 @@ vips__file_open_write( const char *filename, gboolean text_mode )
 /* Load up a file as a string.
  */
 char *
-vips__file_read( FILE *fp, const char *filename, unsigned int *length_out )
+vips__file_read( FILE *fp, const char *filename, size_t *length_out )
 {
         gint64 len;
 	size_t read;
@@ -697,7 +697,7 @@ vips__file_read( FILE *fp, const char *filename, unsigned int *length_out )
  */
 char *
 vips__file_read_name( const char *filename, const char *fallback_dir, 
-	unsigned int *length_out )
+	size_t *length_out )
 {
 	FILE *fp;
 	char *buffer;

tools/vipsedit.c

@@ -216,7 +216,7 @@ main( int argc, char **argv )
 
 	if( setext ) {
 		char *xml;
-		unsigned int size;
+		size_t size;
 
 		if( !(xml = im__file_read( stdin, "stdin", &size )) )
 			error_exit( "%s", _( "could not get ext data" ) );