Changeset 746 for soft/giet_vm

Timestamp:

Dec 15, 2015, 4:19:16 PM (9 years ago)

Author:

alain

Message:

Improve the _fat_lseek() function to support
the SEEK_END value for the <whence> argument.

Location:

soft/giet_vm/giet_fat32

Files:

• fat32.c (modified) (2 diffs)
• fat32_shared.h (modified) (1 diff)

soft/giet_vm/giet_fat32/fat32.c

@@ -3630 +3630 @@
 // the "seek" and "whence" arguments.
 // It has the same semantic as the UNIX lseek() function.
-// Accepted values for whence are SEEK_SET and SEEK_CUR.
+// Accepted values for whence are SEEK_SET / SEEK_CUR / SEEK_END.
 /////////////////////////////////////////////////////////////////////////////////
 // Returns new seek value (in bytes) on success.
@@ -3679 +3679 @@
     if      ( whence == SEEK_CUR ) new_seek = _fat.fd[fd_id].seek + seek;
     else if ( whence == SEEK_SET ) new_seek = seek;
+    else if ( whence == SEEK_END ) new_seek = _fat.fd[fd_id].inode->size + seek;
     else
     {

soft/giet_vm/giet_fat32/fat32_shared.h

@@ -46 +46 @@
 #define SEEK_SET                0
 #define SEEK_CUR                1
+#define SEEK_END                2
 
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