Little changes.

src/builder.h

@@ -0,0 +1,43 @@
+/*
+ * Copyright (c) 2007 Vreixo Formoso
+ * 
+ * This file is part of the libisofs project; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation. See COPYING file for details.
+ */
+
+#ifndef LIBISO_BUILDER_H_
+#define LIBISO_BUILDER_H_
+
+/*
+ * Definitions for IsoNode builders.
+ */
+
+/*
+ * Some functions here will be moved to libisofs.h when we expose 
+ * Builder.
+ */
+
+#include "node.h"
+
+typedef struct Iso_Node_Builder IsoNodeBuilder;
+
+struct Iso_Node_Builder
+{
+
+    /**
+     * 
+     * @return
+     *    1 on success, < 0 on error
+     */
+    int (*create_file)(const IsoFileSource *src, IsoFile **file);
+    
+    
+    
+    int refcount;
+    void *data;
+};
+
+
+
+#endif /*LIBISO_BUILDER_H_*/

src/filesrc.h

@@ -0,0 +1,100 @@
+/*
+ * Copyright (c) 2007 Vreixo Formoso
+ * 
+ * This file is part of the libisofs project; you can redistribute it and/or 
+ * modify it under the terms of the GNU General Public License version 2 as 
+ * published by the Free Software Foundation. See COPYING file for details.
+ */
+#ifndef LIBISO_FILESRC_H_
+#define LIBISO_FILESRC_H_
+
+/*
+ * FIXME definitions here shouldn't be used for now!!!
+ * 
+ */
+
+
+/*
+ * Definitions of streams.
+ */
+
+/*
+ * Some functions here will be moved to libisofs.h when we expose 
+ * Streams.
+ */
+
+//typedef struct Iso_Stream IsoStream;
+//
+//struct Iso_Stream
+//{
+//    /**
+//     * Opens the stream.
+//     * 
+//     * @return 
+//     *     1 on success, < 0 on error, 2 file is smaller than expect,
+//     *     3 file is larger than expected (2 and 3 are not errors, they're
+//     *     handled by read_block, see there. Moreover, IsooStream 
+//     *     implementations doesn't need to check that)
+//     */
+//    int (*open)(IsoStream *stream);
+//
+//    /**
+//     * Close the Stream.
+//     * @return 1 on success, < 0 on error
+//     */
+//    int (*close)(IsoStream *stream);
+//
+//    /**
+//     * Get the size (in bytes) of the stream. This function must return
+//     * always the same size, even if the underlying source file has changed.
+//     */
+//    off_t (*get_size)(IsoStream *stream);
+//
+//    /**
+//     * Read a block (2048 bytes) from the stream.
+//     * 
+//     * This function should always read the full 2048 bytes, blocking if
+//     * needed. When it reaches EOF, the buf is filled with 0's, if needed. 
+//     * Note that the EOF is not reported in that call, but in the next call.
+//     * I.e., when the EOF is reported you can be sure that the function
+//     * has not written anything to the buffer. If the file size is a multiple
+//     * of block size, i.e N*2048, the read_block reports the EOF just when 
+//     * reading the N+1 block.  
+//     * 
+//     * Note that EOF refers to the original size as reported by get_size.
+//     * If the underlying source size has changed, this function should take 
+//     * care of this, truncating the file, or filling the buffer with 0s. I.e.
+//     * this function return 0 (EOF) only when get_size() bytes have been 
+//     * readed.
+//     * 
+//     * On an I/O error, or a file smaller than the expected size, this
+//     * function returns a [specific error code], and the buffer is filled
+//     * with 0s. Subsequent calls will still return an error code and fill
+//     * buffer with 0's, until EOF (as defined above) is reached, and then 
+//     * the function will return 0. 
+//     * 
+//     * Note that if the current size is larger than expected, you don't get 
+//     * any error on reading.
+//     * 
+//     * @param buf 
+//     *     Buffer where data fill be copied, with at least 2048 bytes.
+//     * @return
+//     *     1 sucess, 0 EOF, < 0 error (buf is filled with 0's)
+//     */
+//    int (*read_block)(IsoStream *stream, void *buf);
+//
+//    /**
+//     * Whether this Stram can be read several times, with the same results. 
+//     * For example, a regular file is repeatable, you can read it as many
+//     * times as you want. However, a pipe isn't. 
+//     * 
+//     * This function doesn't take into account if the file has been modified
+//     * between the two reads. 
+//     */
+//    int (*is_repeatable)(IsoStream *stream);
+//
+//    int refcount;
+//    void *data;
+//}
+
+#endif /*LIBISO_FILESRC_H_*/

src/fs_local.c

@@ -24,6 +24,11 @@
 #include <libgen.h>
 #include <string.h>
 
+/*
+ * We can share a local filesystem object, as it has no private atts.
+ */
+IsoFilesystem *lfs = NULL;
+
 typedef struct
 {
     /* IsoFilesystem *fs; It seems not needed */
@@ -314,6 +319,12 @@ int lfs_readlink(IsoFileSource *src, char *buf, size_t bufsiz)
     return ISO_SUCCESS;
 }
 
+static
+IsoFilesystem* lfs_get_filesystem(IsoFileSource *src)
+{
+    return src == NULL ? NULL : lfs;
+}
+
 static
 void lfs_free(IsoFileSource *src)
 {
@@ -328,6 +339,7 @@ void lfs_free(IsoFileSource *src)
 
     free(data->path);
     free(data);
+    iso_filesystem_unref(lfs);
 }
 
 /**
@@ -344,6 +356,11 @@ int iso_file_source_new_lfs(const char *path, IsoFileSource **src)
         return ISO_NULL_POINTER;
     }
 
+    if (lfs == NULL) {
+        /* this should never happen */
+        return ISO_ERROR;
+    }
+
     /* allocate memory */
     data = malloc(sizeof(_LocalFsFileSource));
     if (data == NULL) {
@@ -379,7 +396,11 @@ int iso_file_source_new_lfs(const char *path, IsoFileSource **src)
     lfs_src->read = lfs_read;
     lfs_src->readdir = lfs_readdir;
     lfs_src->readlink = lfs_readlink;
+    lfs_src->get_filesystem = lfs_get_filesystem;
     lfs_src->free = lfs_free;
+    
+    /* take a ref to local filesystem */
+    iso_filesystem_ref(lfs);
 
     /* return */
     *src = lfs_src;
@@ -413,24 +434,27 @@ void lfs_fs_free(IsoFilesystem *fs)
     
 int iso_local_filesystem_new(IsoFilesystem **fs)
 {
-	IsoFilesystem *lfs;
-	
 	if (fs == NULL) {
         return ISO_NULL_POINTER;
     }
 	
-	lfs = malloc(sizeof(IsoFilesystem));
-    if (lfs == NULL) {
-        return ISO_OUT_OF_MEM;
+    if (lfs != NULL) {
+        /* just take a new ref */
+        iso_filesystem_ref(lfs);
+    } else {
+        
+    	lfs = malloc(sizeof(IsoFilesystem));
+        if (lfs == NULL) {
+            return ISO_OUT_OF_MEM;
+        }
+        
+        /* fill struct */
+        lfs->refcount = 1;
+        lfs->data = NULL; /* we don't need private data */
+        lfs->get_root = lfs_get_root;
+        lfs->get_by_path = lfs_get_by_path;
+        lfs->free = lfs_fs_free;
     }
-    
-    /* fill struct */
-    lfs->refcount = 1;
-    lfs->data = NULL; /* we don't need private data */
-    lfs->get_root = lfs_get_root;
-    lfs->get_by_path = lfs_get_by_path;
-    lfs->free = lfs_fs_free;
-	
 	*fs = lfs;
 	return ISO_SUCCESS;
 }

src/fsource.h

@@ -42,7 +42,9 @@ struct Iso_Filesystem
 
     void (*free)(IsoFilesystem *fs);
 
-    int refcount;
+    /* TODO each file will take a ref to IsoFilesystem, so maybe a 64bits
+     * integer is a better choose for this */
+    unsigned int refcount;
     void *data;
 };
 
@@ -170,6 +172,15 @@ struct Iso_File_Source
      * 
      */
     int (*readlink)(IsoFileSource *src, char *buf, size_t bufsiz);
+    
+    /**
+     * Get the filesystem for this source. No extra ref is added, so you
+     * musn't unref the IsoFilesystem.
+     * 
+     * @return
+     *     The filesystem, NULL on error
+     */
+    IsoFilesystem* (*get_filesystem)(IsoFileSource *src);
 
     /**
      * Free implementation specific data. Should never be called by user.

src/libisofs.h

@@ -13,6 +13,8 @@
 typedef struct Iso_Node IsoNode;
 typedef struct Iso_Dir IsoDir;
 typedef struct Iso_Symlink IsoSymlink;
+typedef struct Iso_File IsoFile;
+
 typedef struct Iso_Dir_Iter IsoDirIter;
 
 /**

src/node.h

@@ -13,6 +13,7 @@
  */
 
 #include "libisofs.h"
+#include "stream.h"
 
 #include <sys/types.h>
 #include <sys/stat.h>
@@ -97,7 +98,7 @@ struct Iso_File
 	 * Higher weighting filesare written at the beginning of image 
 	 */
     int sort_weight;
-    
+    IsoStream *stream;
 };
 
 struct Iso_Symlink

src/stream.h

@@ -25,10 +25,7 @@ struct Iso_Stream
      * Opens the stream.
      * 
      * @return 
-     *     1 on success, < 0 on error, 2 file is smaller than expect,
-     *     3 file is larger than expected (2 and 3 are not errors, they're
-     *     handled by read_block, see there. Moreover, IsooStream 
-     *     implementations doesn't need to check that)
+     *     1 on success, < 0 on error
      */
     int (*open)(IsoStream *stream);
 
@@ -39,44 +36,22 @@ struct Iso_Stream
     int (*close)(IsoStream *stream);
 
     /**
-     * Get the size (in bytes) of the stream. This function must return
-     * always the same size, even if the underlying source file has changed.
+     * Get the size (in bytes) of the stream.
      */
     off_t (*get_size)(IsoStream *stream);
 
     /**
-     * Read a block (2048 bytes) from the stream.
+     * Attempts to read up to count bytes from the given stream into
+     * the buffer starting at buf.
      * 
-     * This function should always read the full 2048 bytes, blocking if
-     * needed. When it reaches EOF, the buf is filled with 0's, if needed. 
-     * Note that the EOF is not reported in that call, but in the next call.
-     * I.e., when the EOF is reported you can be sure that the function
-     * has not written anything to the buffer. If the file size is a multiple
-     * of block size, i.e N*2048, the read_block reports the EOF just when 
-     * reading the N+1 block.  
+     * The stream must be open() before calling this, and close() when no 
+     * more needed. 
      * 
-     * Note that EOF refers to the original size as reported by get_size.
-     * If the underlying source size has changed, this function should take 
-     * care of this, truncating the file, or filling the buffer with 0s. I.e.
-     * this function return 0 (EOF) only when get_size() bytes have been 
-     * readed.
-     * 
-     * On an I/O error, or a file smaller than the expected size, this
-     * function returns a [specific error code], and the buffer is filled
-     * with 0s. Subsequent calls will still return an error code and fill
-     * buffer with 0's, until EOF (as defined above) is reached, and then 
-     * the function will return 0. 
-     * 
-     * Note that if the current size is larger than expected, you don't get 
-     * any error on reading.
-     * 
-     * @param buf 
-     *     Buffer where data fill be copied, with at least 2048 bytes.
-     * @return
-     *     1 sucess, 0 EOF, < 0 error (buf is filled with 0's)
+     * @return 
+     *     number of bytes read, 0 if EOF, < 0 on error
      */
-    int (*read_block)(IsoStream *stream, void *buf);
-
+    int (*read)(IsoStream *stream, void *buf, size_t count);
+    
     /**
      * Whether this Stram can be read several times, with the same results. 
      * For example, a regular file is repeatable, you can read it as many
@@ -89,6 +64,6 @@ struct Iso_Stream
 
     int refcount;
     void *data;
-}
+};
 
 #endif /*STREAM_H_*/