# Replace data type long with int to maintain structure sizes in 32/64 bits
--- a/ciso.h	2006-11-03 15:53:02.000000000 -0500
+++ b/ciso.h	2023-08-26 10:01:59.066162109 -0400
@@ -28,10 +28,10 @@
 typedef struct ciso_header
 {
 	unsigned char magic[4];			/* +00 : 'C','I','S','O'                 */
-	unsigned long header_size;		/* +04 : header size (==0x18)            */
+	unsigned int header_size;		/* +04 : header size (==0x18)            */
 	unsigned long long total_bytes;	/* +08 : number of original data size    */
-	unsigned long block_size;		/* +10 : number of compressed block size */
+	unsigned int block_size;		/* +10 : number of compressed block size */
 	unsigned char ver;				/* +14 : version 01                      */
 	unsigned char align;			/* +15 : align of index value            */
 	unsigned char rsv_06[2];		/* +16 : reserved                        */

--- a/ciso.c	2006-11-03 15:53:29.000000000 -0500
+++ b/ciso.c	2023-08-26 09:59:57.817871093 -0400
@@ -117,7 +118,7 @@
 	ciso_total_block = ciso.total_bytes / ciso.block_size;
 
 	/* allocate index block */
-	index_size = (ciso_total_block + 1 ) * sizeof(unsigned long);
+	index_size = (ciso_total_block + 1 ) * sizeof(unsigned int);
 	index_buf  = malloc(index_size);
 	block_buf1 = malloc(ciso.block_size);
 	block_buf2 = malloc(ciso.block_size*2);
@@ -257,7 +258,7 @@
 	}
 
 	/* allocate index block */
-	index_size = (ciso_total_block + 1 ) * sizeof(unsigned long);
+	index_size = (ciso_total_block + 1 ) * sizeof(unsigned int);
 	index_buf  = malloc(index_size);
 	crc_buf    = malloc(index_size);
 	block_buf1 = malloc(ciso.block_size);