Changeset 643 for trunk/libs/mini-libc/stdio.c

Timestamp:

Oct 17, 2019, 3:14:01 PM (5 years ago)

Author:

alain

Message:

Introduce FBF related syscalls.

File:

• trunk/libs/mini-libc/stdio.c (modified) (1 diff)

trunk/libs/mini-libc/stdio.c

@@ -399 +399 @@
 }  // end fclose()
 
+//////////////////////////////////////////
+unsigned int fread( void         * buffer,
+                    unsigned int   size,
+                    unsigned int   nitems,
+                    FILE         * stream )
+{
+    // check stream valid
+    if( stream->key != VALID_OPEN_FILE ) return EOF;
+
+    // get file descriptor from stream pointer
+    int fd = stream->fd;
+
+    // compute nbytes
+    unsigned int nbytes = size * nitems;
+
+    if( hal_user_syscall( SYS_READ,
+                          (reg_t)fd,
+                          (reg_t)buffer,
+                          (reg_t)nbytes, 0 ) == nbytes ) return nitems;
+    else return 0;
+
+}  // end fread() 
+
+//////////////////////////////////////////
+unsigned int fwrite( void         * buffer,
+                     unsigned int   size,
+                     unsigned int   nitems,
+                     FILE         * stream )
+{
+    // check stream valid
+    if( stream->key != VALID_OPEN_FILE ) return EOF;
+
+    // get file descriptor from stream pointer
+    int fd = stream->fd;
+
+    // compute nbytes
+    unsigned int nbytes = size * nitems;
+
+    if( hal_user_syscall( SYS_WRITE,
+                          (reg_t)fd,
+                          (reg_t)buffer,
+                          (reg_t)nbytes, 0 ) == nbytes ) return nitems;
+    else return 0;
+
+}  // end fwrite() 
+
 /////////////////////////////////
 int fprintf( FILE       * stream,