Added opendir, closedir and readdir

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@412 a1c6a512-1295-4272-9138-f99709370657

firmware/common/dir.c

@@ -0,0 +1,97 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <string.h>
+#include "fat.h"
+#include "dir.h"
+#include "debug.h"
+#include "types.h"
+
+static DIR thedir;
+static struct dirent theent;
+static bool busy=FALSE;
+
+DIR* opendir(char* name)
+{
+    char* part;
+    struct fat_direntry entry;
+    struct fat_dir* dir = &(thedir.fatdir);
+
+    if ( busy ) {
+        DEBUGF("Only one open dir at a time\n");
+        return NULL;
+    }
+
+    if ( name[0] != '/' ) {
+        DEBUGF("Only absolute paths supported right now\n");
+        return NULL;
+    }
+
+    if ( fat_opendir(dir, 0) < 0 ) {
+        DEBUGF("Failed opening root dir\n");
+        return NULL;
+    }
+
+    while ( (part = strtok(name, "/")) ) {
+        int partlen = strlen(part);
+        /* scan dir for name */
+        while (1) {
+            if (fat_getnext(dir,&entry) < 0)
+                return NULL;
+            if ( !entry.name[0] )
+                return NULL;
+            if ( (entry.attr & FAT_ATTR_DIRECTORY) &&
+                 (!strncmp(part, entry.name, partlen)) ) {
+                if ( fat_opendir(dir, entry.firstcluster) < 0 ) {
+                    DEBUGF("Failed opening dir '%s' (%d)\n",
+                           part, entry.firstcluster);
+                    return NULL;
+                }
+                break;
+            }
+        }
+    }
+
+    busy = TRUE;
+
+    return &thedir;
+}
+
+int closedir(DIR* dir)
+{
+    busy=FALSE;
+    return 0;
+}
+
+struct dirent* readdir(DIR* dir)
+{
+    struct fat_direntry entry;
+
+    if (fat_getnext(&(dir->fatdir),&entry) < 0)
+        return NULL;
+
+    if ( !entry.name[0] )
+        return NULL;
+
+    strncpy(theent.d_name, entry.name, sizeof( theent.d_name ) );
+    theent.attribute = entry.attr;
+    theent.size = entry.filesize;
+
+    return &theent;
+}

firmware/common/dir.h

@@ -16,7 +16,6 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-
 #ifndef _DIR_H_
 #define _DIR_H_
 
@@ -31,10 +30,16 @@ struct dirent {
 
 
 #ifndef SIMULATOR
+
+#include "fat.h"
+
 typedef struct {
-    int offset;
+    int startcluster;
+    struct fat_dir fatdir;
 } DIR;
+
 #else // SIMULATOR
+
 #ifdef WIN32
 #include <io.h>
 typedef struct DIRtag

firmware/test/fat/Makefile

@@ -5,7 +5,7 @@ CFLAGS = -g -Wall -DTEST_FAT -I$(DRIVERS) -I$(FIRMWARE)/common -I$(FIRMWARE) -I.
 
 TARGET = fat
 
-$(TARGET): fat.o ata-sim.o debug.o main.o disk.o
+$(TARGET): fat.o ata-sim.o main.o disk.o debug.o dir.o
 	gcc -g -o fat $+ -lfl
 
 fat.o: $(DRIVERS)/fat.c $(DRIVERS)/fat.h $(DRIVERS)/ata.h
@@ -14,6 +14,9 @@ fat.o: $(DRIVERS)/fat.c $(DRIVERS)/fat.h $(DRIVERS)/ata.h
 disk.o: $(FIRMWARE)/common/disk.c
 	$(CC) $(CFLAGS) -c $< -o $@
 
+dir.o: $(FIRMWARE)/common/dir.c
+	$(CC) $(CFLAGS) -c $< -o $@
+
 debug.o: $(FIRMWARE)/debug.c
 	$(CC) $(CFLAGS) -c $< -o $@
 

firmware/test/fat/main.c

@@ -5,11 +5,12 @@
 #include "ata.h"
 #include "debug.h"
 #include "disk.h"
+#include "dir.h"
 
 void dbg_dump_sector(int sec);
 void dbg_dump_buffer(unsigned char *buf);
 void dbg_print_bpb(struct bpb *bpb);
-void dbg_console(struct bpb *bpb);
+void dbg_console(void);
 
 void dbg_dump_sector(int sec)
 {
@@ -79,34 +80,38 @@ void dbg_print_bpb(struct bpb *bpb)
     printf("fat_type = FAT32\n");
 }
 
-void dbg_dir(struct bpb *bpb, int currdir)
+void dbg_dir(char* currdir)
 {
-    struct fat_dirent dent;
-    struct fat_direntry de;
+    DIR* dir;
+    struct dirent* entry;
 
-    if(fat_opendir(bpb, &dent, currdir) >= 0)
+    dir = opendir(currdir);
+    if (dir)
     {
-        while(fat_getnext(bpb, &dent, &de) >= 0)
+        for ( entry = readdir(dir); 
+              entry; 
+              entry = readdir(dir) )
         {
-            printf("%s (%d)\n", de.name,de.firstcluster);
+            printf("%s (%08x)\n", entry->d_name, entry->size);
         }
     }
     else
     {
-        fprintf(stderr, "Could not read dir on cluster %d\n", currdir);
+        fprintf(stderr, "Could not open dir %s\n", currdir);
     }
+    closedir(dir);
 }
 
-void dbg_type(struct bpb *bpb, int cluster)
+void dbg_type(int cluster)
 {
     unsigned char buf[SECTOR_SIZE*5];
-    struct fat_fileent ent;
+    struct fat_file ent;
     int i;
 
-    fat_open(bpb,cluster,&ent);
+    fat_open(cluster,&ent);
     
     for (i=0;i<5;i++)
-        if(fat_read(bpb, &ent, 1, buf) >= 0)
+        if(fat_read(&ent, 1, buf) >= 0)
         {
             buf[SECTOR_SIZE]=0;
             printf("%s\n", buf);
@@ -125,7 +130,7 @@ void dbg_prompt(void)
     printf("C:%s> ", current_directory);
 }
 
-void dbg_console(struct bpb* bpb)
+void dbg_console(void)
 {
     char cmd[32] = "";
     char last_cmd[32] = "";
@@ -148,12 +153,10 @@ void dbg_console(struct bpb* bpb)
             {
                 if(!strcasecmp(s, "dir"))
                 {
-                    int secnum = 0;
-                    if((s = strtok(NULL, " \n")))
-                    {
-                        secnum = atoi(s);
-                    }
-                    dbg_dir(bpb, secnum);
+                    s = strtok(NULL, " \n");
+                    if (!s)
+                        s = "/";
+                    dbg_dir(s);
                     continue;
                 }
 
@@ -182,7 +185,7 @@ void dbg_console(struct bpb* bpb)
                     {
                         cluster = atoi(s);
                     }
-                    dbg_type(bpb,cluster);
+                    dbg_type(cluster);
                     continue;
                 }
             
@@ -198,8 +201,6 @@ void dbg_console(struct bpb* bpb)
 
 int main(int argc, char *argv[])
 {
-    struct bpb bpb;
-    
     if(ata_init()) {
         DEBUGF("*** Warning! The disk is uninitialized\n");
         return -1;
@@ -209,11 +210,11 @@ int main(int argc, char *argv[])
         return -1;
     }
 
-    if(fat_mount(&bpb,part[0].start)) {
+    if(fat_mount(part[0].start)) {
         DEBUGF("*** Failed mounting fat\n");
     }
 
-    dbg_console(&bpb);
+    dbg_console();
     return 0;
 }