[easytag/wip/disc-number: 4/7] Add total discs support to FLAC tag parser



commit 711f58b88e700758690e4f5ab4e84e6f8d8489f4
Author: Mathias Reineke <saihtam gmx net>
Date:   Mon Jul 8 10:57:41 2013 +0200

    Add total discs support to FLAC tag parser

 src/flac_tag.c |   51 +++++++++++++++++++++++++++++++++++++++++++--------
 1 files changed, 43 insertions(+), 8 deletions(-)
---
diff --git a/src/flac_tag.c b/src/flac_tag.c
index cb3612c..a2ccc40 100644
--- a/src/flac_tag.c
+++ b/src/flac_tag.c
@@ -272,9 +272,33 @@ gboolean Flac_Tag_Read_File_Tag (gchar *filename, File_Tag *FileTag)
                     }
                 }
 
-                /***************
-                 * Disc Number *
-                 ***************/
+                /******************************
+                 * Disc Number and Disc Total *
+                 ******************************/
+                if ((field_num = FLAC__metadata_object_vorbiscomment_find_entry_from (block, 0, 
"DISCTOTAL")) >= 0)
+                {
+                    /* Extract field value. */
+                    field = &vc->comments[field_num];
+                    field_value = memchr (field->entry, '=', field->length);
+
+                    if (field_value)
+                    {
+                        field_value++;
+                        if (field_value && g_utf8_strlen (field_value, -1) > 0)
+                        {
+                            field_len = field->length - (field_value - (gchar*) field->entry);
+                            field_value_tmp = g_strndup (field_value,
+                                                         field_len);
+                            field_value = Try_To_Validate_Utf8_String (field_value_tmp);
+                            g_free (field_value_tmp);
+
+                            FileTag->disc_total = et_disc_number_to_string (atoi (field_value));
+                            g_free (field_value);
+                        }
+                    }
+                    /* Discs is also filled below, if not done here. */
+                }
+
                 if ( (field_num = FLAC__metadata_object_vorbiscomment_find_entry_from(block,0,"DISCNUMBER")) 
= 0 )
                 {
                     /* Extract field value */
@@ -290,7 +314,17 @@ gboolean Flac_Tag_Read_File_Tag (gchar *filename, File_Tag *FileTag)
                             field_value_tmp = g_strndup(field_value, field_len);
                             field_value = Try_To_Validate_Utf8_String(field_value_tmp);
                             g_free(field_value_tmp);
-                            FileTag->disc_number = field_value;
+                            string = g_utf8_strchr (field_value, -1, '/');
+
+                            if (string && !FileTag->disc_total)
+                            {
+                                FileTag->disc_total = et_disc_number_to_string (atoi (string + 1));
+                                *string = '\0';
+                            }
+
+                            FileTag->disc_number = et_disc_number_to_string (atoi (field_value));
+
+                            g_free (field_value);
                         }
                     }
                 }
@@ -913,10 +947,11 @@ gboolean Flac_Tag_Write_File_Tag (ET_File *ETFile)
          *********/
         Flac_Set_Tag(vc_block,"ALBUM=",FileTag->album,VORBIS_SPLIT_FIELD_ALBUM);
 
-        /***************
-         * Disc Number *
-         ***************/
-        Flac_Set_Tag(vc_block,"DISCNUMBER=",FileTag->disc_number,FALSE);
+        /******************************
+         * Disc Number and Disc Total *
+         ******************************/
+        Flac_Set_Tag (vc_block, "DISCNUMBER=", FileTag->disc_number, FALSE);
+        Flac_Set_Tag (vc_block, "DISCTOTAL=", FileTag->disc_total, FALSE);
 
         /********
          * Year *


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