[Extractor-gtk-cvslog] SF.net SVN: extractor-gtk: [49] trunk/extractor/generic.c

[<som...@us...>]

Revision: 49
          http://extractor-gtk.svn.sourceforge.net/extractor-gtk/?rev=49&view=rev
Author:   someone-guy
Date:     2008-02-19 12:08:39 -0800 (Tue, 19 Feb 2008)

Log Message:
-----------
Support finding and extracting PNG files

Modified Paths:
--------------
    trunk/extractor/generic.c

Modified: trunk/extractor/generic.c
===================================================================
--- trunk/extractor/generic.c	2008-02-19 20:08:31 UTC (rev 48)
+++ trunk/extractor/generic.c	2008-02-19 20:08:39 UTC (rev 49)
@@ -43,12 +43,29 @@
 static file_t *get_list(FILE *in) {
   register buffer_t t = 0;
   int bz2idx = -1;
+  int pngidx = -1;
   int cnt = 0;
   file_t *list = calloc(1, sizeof(file_t));
   rewind(in);
   while (!feof(in) && cnt + 3 < SIZE_MAX / sizeof(file_t)) {
     int i;
     t = t << 8 | fgetc(in);
+    switch (t) {
+      case HUGETAG(0x89, 'P', 'N', 'G', 0x0d, 0x0a, 0x1a, 0x0a):
+        if (pngidx >= 0 && list[pngidx].len == 0) {
+          list[pngidx].start = ftell(in) - 8;
+          break;
+        }
+        add_entry(&list, cnt, "png");
+        list[cnt].start = ftell(in) - 8;
+        pngidx = cnt;
+        cnt++;
+        break;
+      case HUGETAG(0, 0, 0, 0, 'I', 'E', 'N', 'D'):
+        if (pngidx >= 0)
+          list[pngidx].len = ftell(in) - list[pngidx].start + 4;
+        break;
+    }
     switch (t & 0xffffffff) {
       case TAG('R', 'I', 'F', 'F'): {
         uint32_t len = read_le32(in);


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