Define some functions and responsabilities for image generation.

Still very preliminary work.

Makefile.am

@@ -34,7 +34,8 @@ src_libisofs_la_SOURCES = \
 	src/ecma119.h \
 	src/ecma119.c \
 	src/ecma119_tree.h \
-	src/ecma119_tree.c
+	src/ecma119_tree.c \
+	src/writer.h
 libinclude_HEADERS = \
 	src/libisofs.h
 

src/ecma119.c

@@ -6,4 +6,123 @@
  * published by the Free Software Foundation. See COPYING file for details.
  */
 
+#include "libisofs.h"
 #include "ecma119.h"
+#include "ecma119_tree.h"
+#include "error.h"
+#include "filesrc.h"
+#include "image.h"
+#include "writer.h"
+
+#include "libburn/libburn.h"
+
+#include <stdlib.h>
+
+static 
+int ecma119_image_new(IsoImage *src, Ecma119WriteOpts *opts, 
+                      Ecma119Image **img)
+{
+    int ret;
+    Ecma119Image *target;
+    
+    /* 1. Allocate target and copy opts there */
+    target = calloc(1, sizeof(Ecma119Image));
+    if (target == NULL) {
+        return ISO_MEM_ERROR;
+    }
+    
+    ret = ecma119_tree_create(target, src->root);
+    if (ret < 0) {
+        // TODO free image data
+        return ret;
+    }
+    
+    /* 
+     * 2. Based on those options, create needed writers: iso, joliet...
+     * Each writer inits its structures and stores needed info into
+     * target. 
+     * If the writer needs an volume descriptor, it increments image
+     * current block.
+     * Finally, create Writer for files.
+     */
+    
+    /*
+     * 3. 
+     * Call compute_data_blocks() in each Writer.
+     * That function computes the size needed by its structures and
+     * increments image current block propertly.
+     */
+    
+    
+    /* 4. Start writting thread */ 
+    
+    *img = target;
+    return ISO_SUCCESS;
+}
+
+static int
+bs_read(struct burn_source *bs, unsigned char *buf, int size)
+{
+    // TODO to implement
+    return 0;
+}
+
+static off_t
+bs_get_size(struct burn_source *bs)
+{
+    Ecma119Image *image = (Ecma119Image*)bs->data;
+    return image->total_size;
+}
+
+static void
+bs_free_data(struct burn_source *bs)
+{
+    Ecma119Image *t = (Ecma119Image*)bs->data;
+    ecma119_node_free(t->root);
+    iso_image_unref(t->image);
+    iso_file_src_free(t);
+    
+    free(t);
+}
+
+static
+int bs_set_size(struct burn_source *bs, off_t size)
+{
+    //TODO to implement!!
+//    struct ecma119_write_target *t = (struct ecma119_write_target*)bs->data;
+//    t->total_size = size;
+    return 1;
+}
+
+int iso_image_create(IsoImage *image, Ecma119WriteOpts *opts,
+                     struct burn_source **burn_src)
+{
+    int ret;
+    struct burn_source *source;
+    Ecma119Image *target = NULL;
+    
+    if (image == NULL || opts == NULL || burn_src == NULL) {
+        return ISO_NULL_POINTER;
+    }
+    
+    source = calloc(1, sizeof(struct burn_source));
+    if (source == NULL) {
+        return ISO_MEM_ERROR;
+    }
+    
+    ret = ecma119_image_new(image, opts, &target);
+    if (ret < 0) {
+        free(source);
+        return ret;
+    }
+    
+    source->refcount = 1;
+    source->read = bs_read;
+    source->get_size = bs_get_size;
+    source->set_size = bs_set_size;
+    source->free_data = bs_free_data;
+    source->data = target;
+    return ISO_SUCCESS;
+}
+
+

src/ecma119.h

@@ -9,15 +9,44 @@
 #ifndef LIBISO_ECMA119_H_
 #define LIBISO_ECMA119_H_
 
+#include "libisofs.h"
+
 typedef struct ecma119_image Ecma119Image;
 typedef struct ecma119_node Ecma119Node;
 typedef struct Iso_File_Src IsoFileSrc;
+typedef struct Iso_Image_Writer IsoImageWriter;
 
 struct ecma119_image {
+    IsoImage *image;
     Ecma119Node *root;
     
+    //int volnum;
+    
     unsigned int iso_level:2;
     
+//    int relaxed_constraints; /**< see ecma119_relaxed_constraints_flag */
+//    
+//    int replace_mode; /**< Replace ownership and modes of files
+//                      * 
+//                      * 0. filesystem values
+//                      * 1. useful values
+//                      * bits 1-4 bitmask: 
+//                      *     2 - replace dir
+//                      *     3 - replace file 
+//                      *     4 - replace gid
+//                      *     5 - replace uid
+//                      */
+//    mode_t dir_mode;
+//    mode_t file_mode;
+//    gid_t gid;
+//    uid_t uid;
+    
+    
+    time_t now;     /**< Time at which writing began. */
+    off_t total_size; /**< Total size of the output. This only
+                        *  includes the current volume. */
+    //uint32_t vol_space_size;
+
     /* tree of files sources */
     void *file_srcs;
     int file_count;

src/ecma119_tree.c

@@ -479,12 +479,12 @@ int mangle_tree(Ecma119Image *img)
 }
 
 
-int ecma119_tree_create(Ecma119Image *img, IsoNode *iso)
+int ecma119_tree_create(Ecma119Image *img, IsoDir *iso)
 {
     int ret;
     Ecma119Node *root;
     
-    ret = create_tree(img, iso, &root, 1, 0);
+    ret = create_tree(img, (IsoNode*)iso, &root, 1, 0);
     if (ret < 0) {
         return ret;
     }

src/ecma119_tree.h

@@ -40,15 +40,12 @@ struct ecma119_node
      */
     char *iso_name;
     
-    // TODO mmm, is this needed? 
-    // or should we compute charset translation on-the-fly?
-    //char *name;      /**< full name, in output charset (UTF-8 for now) */
-    
     Ecma119Node *parent;
     
     IsoNode *node; /*< reference to the iso node */
 
-    enum ecma119_node_type type; /**< file, symlink, directory or placeholder */
+    /**< file, symlink, directory or placeholder */
+    enum ecma119_node_type type; 
     union {
         IsoFileSrc *file;
         struct ecma119_dir_info dir;
@@ -58,7 +55,7 @@ struct ecma119_node
 /**
  * 
  */
-int ecma119_tree_create(Ecma119Image *img, IsoNode *iso);
+int ecma119_tree_create(Ecma119Image *img, IsoDir *iso);
 
 /**
  * Free an Ecma119Node, and its children if node is a dir

src/filesrc.c

@@ -11,6 +11,9 @@
 #include "node.h"
 
 #include <stdlib.h>
+
+/* tdestroy is a GNU specific function */
+#define __USE_GNU
 #include <search.h>
 
 static
@@ -100,3 +103,12 @@ int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)
     return ISO_SUCCESS;
 }
 
+void free_node(void *nodep)
+{
+    /* nothing to do */
+}
+
+void iso_file_src_free(Ecma119Image *img)
+{
+    tdestroy(img->file_srcs, free_node);
+}

src/filesrc.h

@@ -47,6 +47,11 @@ struct Iso_File_Src {
  */
 int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src);
 
+/**
+ * Free the IsoFileSrc especific data
+ */
+void iso_file_src_free(Ecma119Image *img);
+
 // TODO not implemented
 int iso_file_src_open(IsoFileSrc *file);
 

src/libisofs.h

@@ -53,6 +53,92 @@ enum IsoHideNodeFlag {
     LIBISO_HIDE_ON_JOLIET = 1 << 1
 };
 
+/**
+ * Holds the options for the image generation.
+ */
+typedef struct {
+    //int volnum; /**< The volume in the set which you want to write (usually 0) */
+    int level;  /**< ISO level to write at. */
+    int flags;  /**< Which extensions to support. */
+    //int relaxed_constraints; /**< see ecma119_relaxed_constraints_flag */
+    
+    //unsigned int copy_eltorito:1;
+        /**<
+         * In multisession discs, select whether to copy el-torito catalog
+         * and boot image. Copy is needed for isolinux images, that need to
+         * be patched. However, it can lead to problems when the image is 
+         * not present in the iso filesystem, because we can't figure out
+         * its size. In those cases, we only copy 1 block of data.
+         */
+    
+    //unsigned int sort_files:1;
+                /**< If files should be sorted based on their weight. */
+//    unsigned int default_mode:1;
+//                /**<
+//                 * The default values for files and directory permissions,
+//                 * gid and uid. This option can be overwritten when set
+//                 * one of the following.
+//                 * 0 to use useful values, 1 to use node modes (this are
+//                 * the same as filesystem ones if not changed after added
+//                 * to tree). 
+//                 */
+//    unsigned int replace_dir_mode:1;
+//                /**<
+//                 * When 1, permissions for all dirs will be replaced by the
+//                 * specified in dir_mode field.
+//                 */
+//    unsigned int replace_file_mode:1;
+//                /**<
+//                 * When 1, permissions for all files will be replaced by the
+//                 * specified in file_mode field.
+//                 */
+//    unsigned int replace_uid:1;
+//                /**<
+//                 * When 1, uid of all nodes (both files and dirs) will be
+//                 * replaced by the specified in uid field.
+//                 */
+//    unsigned int replace_gid:1;
+//                /**<
+//                 * When 1, gid of all nodes (both files and dirs) will be
+//                 * replaced by the specified in gid field.
+//                 */
+//    mode_t dir_mode; /**< Mode to use on dirs when replace_dir_mode is set. */
+//    mode_t file_mode; /**< Mode to use on files when replace_file_mode is set. */
+//    gid_t gid; /**< gid to use when replace_gid is set. */
+//    uid_t uid; /**< uid to use when replace_uid is set. */
+//    char *input_charset; /**< NULL to use default charset */
+//    char *ouput_charset; /**< NULL to use default charset */
+//    uint32_t ms_block;
+                /**< 
+                 * Start block for multisession. When this is greater than 0, 
+                 * it's suppossed to be the lba of the next writable address 
+                 * on disc; all block lba on image will take this into account,
+                 * and files from a previous session will not be written on 
+                 * image. This behavior is only suitable for images to be
+                 * appended to a multisession disc.
+                 * When this is 0, no multisession image will be created. If 
+                 * some files are taken from a previous image, its contents
+                 * will be written again to the new image. Use this with new
+                 * images or if you plan to modify an existin image. 
+                 */
+//    struct data_source* src;
+//                /**<
+//                 * When modifying a image, this is the source of the original
+//                 * image, used to read file contents.
+//                 * Otherwise it can be NULL.
+//                 */
+//    uint8_t *overwrite;
+//                /**<
+//                 * When not NULL, it should point to a buffer of at least 
+//                 * 64KiB, where libisofs will write the contents that should 
+//                 * be written at the beginning of a overwriteable media, to
+//                 * grow the image.
+//                 * You shoudl initialize the buffer either with 0s, or with
+//                 * the contents of the first blocks of the image you're
+//                 * growing. In most cases, 0 is good enought.
+//                 */
+} Ecma119WriteOpts;
+
 /**
  * Create a new image, empty.
  * 

src/writer.h

@@ -8,28 +8,24 @@
 #ifndef LIBISO_IMAGE_WRITER_H_
 #define LIBISO_IMAGE_WRITER_H_
 
-struct Iso_Writer_State
+#include "ecma119.h"
-{
-    
-};
 
 struct Iso_Image_Writer
 {
+    /**
+     * 
+     */
+    int (*compute_data_blocks)(IsoImageWriter *writer);
     
-    //init()
+    int (*write_vol_desc)(IsoImageWriter *writer, int fd);
     
-    //compute_dir_structure()
+    int (*write_data)(IsoImageWriter *writer, int fd);
     
-    //write_vol_desc
+    int (*free_data)(IsoImageWriter *writer);
-    
-    //
-    
-  
-    //free
     
     void *data;
     Ecma119Image *image;
-    
+    IsoImageWriter *next;
 };
 
 #endif /*LIBISO_IMAGE_WRITER_H_*/