Changeset 7a819535 in mainline for uspace/app/filegen/filegen.c

Timestamp:

2011-06-12T05:29:50Z (14 years ago)

Author:

Oleg Romanenko <romanenko.oleg@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

b12edd1

Parents:

52ee8b7a

Message:

Add crc32 calculation to filegen utility.

File:

• uspace/app/filegen/filegen.c (modified) (2 diffs)

uspace/app/filegen/filegen.c

@@ -18 +18 @@
 #include <errno.h>
 #include <sys/time.h>
+#include "crc32.h"
 
 #define NAME    "filegen"
 #define VERSION "0.0.1"
+
+#define BUFFERSIZE 256
+
 
 static void print_help(void);
@@ -46 +50 @@
         }
         
-        size = size / sizeof(int);
-
         struct timeval tv;      
         gettimeofday(&tv, NULL);
         srandom(tv.tv_sec + tv.tv_usec / 100000);       
 
-        uint32_t i;
-        int dword=0;
-        for (i = 0; i<size; i++) {
-                dword = rand();
-                write(fd, &dword, sizeof(int));
+        uint64_t i=0, pbuf=0;
+        uint32_t crc=~0;
+        char buf[BUFFERSIZE];
+        
+        while (i<size) {
+                pbuf=0;
+                while (i<size && pbuf<BUFFERSIZE) {
+                        buf[pbuf] = rand() % 255;
+                        i++;
+                        pbuf++;
+                }
+                if (pbuf) {
+                        crc32(buf, pbuf, &crc);
+                        write(fd, buf, pbuf);
+                }
         }
-
+        
         close(fd);
+        crc = ~crc;
+        printf("%s: %x\n", argv[1], crc);
 
         return 0;