Snapshot of file writing code. Bugs remain. Only short names are supported yet.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@2726 a1c6a512-1295-4272-9138-f99709370657

3 files changed, 79 insertions, 5 deletions

diff --git a/firmware/test/fat/README b/firmware/test/fat/README
new file mode 100644
index 0000000..76141c0
--- /dev/null
+++ b/firmware/test/fat/README
@@ -0,0 +1,25 @@
+This code is for testing the Rockbox fat code on a dummy drive image file.
+
+Dummy image
+-----------
+Here's how to create a 1 gig dummy drive image in linux:
+
+# dd if=/dev/hda of=disk.img bs=1M count=1024
+
+You can then format disk.img as a FAT32 partition:
+
+# mkdosfs -F 32 disk.img
+
+To mount the image, your linux kernel must include the loopback device:
+
+# mount -o loop disk.img /mnt/image
+
+Now copy some test data to the disk, umount it and start testing.
+
+
+Test code
+---------
+The files in this dir build the 'fat' program. It will read 'disk.img' and
+treat is as a real disk, thanks to the ata-sim.c module.
+
+Modify the main.c source code to make it perform the tests you want.
diff --git a/firmware/test/fat/ata-sim.c b/firmware/test/fat/ata-sim.c
index ab7266d..a37fabc 100644
--- a/firmware/test/fat/ata-sim.c
+++ b/firmware/test/fat/ata-sim.c
@@ -24,6 +24,13 @@ int ata_read_sectors(unsigned long start, unsigned char count, void* buf)
 
 int ata_write_sectors(unsigned long start, unsigned char count, void* buf)
 {
+    DEBUGF("Writing block 0x%lx\n",start); 
+
+    if (start == 0) {
+        DEBUGF("Holy crap! You're writing on sector 0!\n");
+        exit(0);
+    }
+
     if(fseek(file,start*BLOCK_SIZE,SEEK_SET)) {
         perror("fseek");
         return -1;
diff --git a/firmware/test/fat/main.c b/firmware/test/fat/main.c
index 4a11e0a..1b9fd22 100644
--- a/firmware/test/fat/main.c
+++ b/firmware/test/fat/main.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <stdarg.h>
 #include "fat.h"
 #include "debug.h"
 #include "disk.h"
@@ -14,6 +15,15 @@ void dbg_dump_sector(int sec);
 void dbg_dump_buffer(unsigned char *buf);
 void dbg_console(void);
 
+void panicf( char *fmt, ...)
+{
+    va_list ap;
+    va_start( ap, fmt );
+    vprintf( fmt, ap );
+    va_end( ap );
+    exit(0);
+}
+
 void dbg_dump_sector(int sec)
 {
     unsigned char buf[512];
@@ -75,14 +85,16 @@ void dbg_dir(char* currdir)
 void dbg_mkfile(char* name)
 {
     char* text = "Detta är en dummy-text\n";
+    int i;
     int fd = open(name,O_WRONLY);
     if (fd<0) {
         DEBUGF("Failed creating file\n");
         return;
     }
-    if (write(fd, text, strlen(text)) < 0)
-        DEBUGF("Failed writing data\n");
-
+    for (i=0;i<200;i++)
+        if (write(fd, text, strlen(text)) < 0)
+            DEBUGF("Failed writing data\n");
+    
     close(fd);
 }
 
@@ -168,6 +180,33 @@ void dbg_tail(char* name)
     close(fd);
 }
 
+void dbg_head(char* name)
+{
+    unsigned char buf[SECTOR_SIZE*5];
+    int fd,rc;
+
+    fd = open(name,O_RDONLY);
+    if (fd<0)
+        return;
+    DEBUGF("Got file descriptor %d\n",fd);
+    
+    rc = read(fd, buf, SECTOR_SIZE);
+    if( rc > 0 )
+    {
+        buf[rc]=0;
+        printf("%d: %s\n", strlen(buf), buf);
+    }
+    else if ( rc == 0 ) {
+        DEBUGF("EOF\n");
+    }
+    else
+    {
+        DEBUGF("Failed reading file: %d\n",rc);
+    }
+
+    close(fd);
+}
+
 char current_directory[256] = "\\";
 int last_secnum = 0;
 
@@ -284,9 +323,12 @@ int main(int argc, char *argv[])
     }
 
     //dbg_console();
-    //dbg_tail("/fat.h");
     //dbg_dir("/");
-    dbg_mkfile("/apa.txt");
+#if 1
+    dbg_head("/bepa.txt");
+#else
+    dbg_mkfile("/bepa.txt");
+#endif
     dbg_dir("/");
 
     return 0;