Changeset 643 for trunk/libs/mini-libc

Timestamp:

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

Author:

alain

Message:

Introduce FBF related syscalls.

Location:

trunk/libs/mini-libc

Files:

• stdio.c (modified) (1 diff)
• stdio.h (modified) (1 diff)
• stdlib.h (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,

trunk/libs/mini-libc/stdio.h

@@ -141 +141 @@
              const char * format, ... );
 
+/*********************************************************************************************
+ * This function moves <nitems> oblects, each <size> bytes long, from an input stream
+ * identified by <stream>, to the user buffer identified by the <buffer> argument.
+ * It can be a regular file or a character oriented input device.
+ *********************************************************************************************
+ * @ stream    : pointer on a stream.
+ * @ format    : formated string.
+ * @ returns actual number of items read if success / returns 0 if failure.
+ ********************************************************************************************/
+unsigned int fread( void         * buffer,
+                    unsigned int   size,
+                    unsigned int   nitems,
+                    FILE         * stream );  
+
+/*********************************************************************************************
+ * This function moves <nitems> oblects, each <size> bytes long, from an user buffer
+ * identified by the <buffer> argument, to an output stream identified by <stream>.
+ * It can be a  regular file or a character oriented input device.
+ *********************************************************************************************
+ * @ stream    : pointer on a stream.
+ * @ format    : formated string.
+ * @ returns actual number of written items if success / returns 0 if failure.
+ ********************************************************************************************/
+unsigned int fwrite( void         * buffer,
+                     unsigned int   size,
+                     unsigned int   nitems,
+                     FILE         * stream );  
 
 #endif  // _STDIO_H_

trunk/libs/mini-libc/stdlib.h

@@ -39 +39 @@
  * This function terminates a process.
  *****************************************************************************************
- * @ status   : terminaison status : 0 / EXIT_SUCCESS / EXIT_FAILURE.
+ * @ status   : terminaison status : EXIT_SUCCESS / EXIT_FAILURE.
  ****************************************************************************************/
 void exit( int status );