Changeset 459 for trunk/libs/mini-libc/stdio.c

Timestamp:

Aug 13, 2018, 1:43:20 PM (6 years ago)

Author:

alain

Message:

Introduce the math library, to support the floating point
data used by the multi-thread fft application.
Fix several bugs regarding the FPU context save/restore.
Introduce support for the %f format in printf.

File:

• trunk/libs/mini-libc/stdio.c (modified) (5 diffs)

trunk/libs/mini-libc/stdio.c

@@ -26 +26 @@
 #include <almosmkh.h>
 #include <unistd.h>
+#include <fcntl.h>
+
+////////////////////////////////////////////////////////////////////////////////////////
+//          stdio library global variables
+////////////////////////////////////////////////////////////////////////////////////////
+
+FILE open_file_array[MAX_OPEN_FILE_PER_PROCESS];  // array of open files structures
+
+////////////////////////////////////////////////////////////////////////////////////////
+//          stdio library functions
+////////////////////////////////////////////////////////////////////////////////////////
 
 //////////////////////////////////////////
@@ -144 +155 @@
                 break;
             }
-/*
             case ('f'):             // IEEE754 64 bits
                                     // integer part : up to 10 decimal digits
@@ -234 +244 @@
                 break;
             }
-*/                    
             default:       // unsupported argument type
             {
@@ -272 +281 @@
     {
         string[count] = 0;
+
         return write( 1 , &string , count );
     }
-}
+}  // end printf()
 
 /////////////
@@ -309 +319 @@
 
     return count;
-}
-
-
-
-
-
+}  // end snprintf()
+
+////////////////////////////////////
+FILE * fopen( const char * pathname,
+              const char * mode )
+{
+    //TODO handle the "mode" argument
+    if( mode != NULL )
+    {
+        printf("\n[ERROR] in %s : the mode argument must be NULL\n", __FUNCTION__ );
+        return NULL;
+    }
+
+    // get a file descriptor from kernel
+    int fd = open( pathname,
+                   O_CREAT | O_RDWR, 
+                   0 );
+
+    if( fd < 0 )
+    {
+        printf("\n[ERROR] in %s : file %s not found\n", __FUNCTION__ , pathname );
+        return NULL;
+    }
+    if( fd > MAX_OPEN_FILE_PER_PROCESS )
+    {
+        printf("\n[ERROR] in %s : not enough space for file %s\n", __FUNCTION__ , pathname );
+        return NULL;
+    }
+
+    // register stream in open_file_array[]
+    open_file_array[fd].fd  = fd;
+    open_file_array[fd].key = VALID_OPEN_FILE;
+
+    return &open_file_array[fd];
+}  // end fopen()
+
+///////////////////////////
+int fclose( FILE * stream )
+{
+    // check stream valid
+    if( stream->key != VALID_OPEN_FILE ) return EOF;
+
+    // get file descriptor from stream pointer
+    int fd = stream->fd;
+
+    // remove stream from open_file_array[]
+    open_file_array[fd].key = 0;
+    
+    return close( fd );
+}  // end fclose()
+
+/////////////////////////////////
+int fprintf( FILE       * stream,
+             const char * format, ... )
+{
+    char      string[4096];
+    va_list   args;
+    int       count;
+    int       fd;
+    
+    // check stream valid
+    if( stream->key != VALID_OPEN_FILE ) return EOF;
+
+    va_start( args, format );
+    count = xprintf( string , 4095 , format , &args ); 
+    va_end( args );
+
+    if ( count == -1 ) 
+    {
+        display_string( "fprintf : xprintf failure" );
+        return -1;
+    }
+    else 
+    {
+        // get file descriptor from file pointer
+        fd = stream->fd;
+        
+        string[count] = 0;
+
+        return write( fd , &string , count );
+    }
+}  // end fprintf()
+
+
+
+
+