From 69c9b0423b43a81cf60827a77c1644bb5d74ff74 Mon Sep 17 00:00:00 2001
From: skeezix <skeezix@flotsam-vm.(none)>
Date: Tue, 15 Dec 2009 10:50:59 -0500
Subject: [PATCH] Added basic emit_icon_to_buffer() routine for cpasjuste; you
 must free its return on your own

---
 include/pnd_desktop.h |  1 +
 lib/pnd_desktop.c     | 82 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 83 insertions(+)

diff --git a/include/pnd_desktop.h b/include/pnd_desktop.h
index a6aba00..550b03e 100644
--- a/include/pnd_desktop.h
+++ b/include/pnd_desktop.h
@@ -19,6 +19,7 @@ unsigned char pnd_emit_dotdesktop ( char *targetpath, char *pndrun, pnd_disco_t
 // emit_icon() will attempt to copy the icon from a PXML directory, or from a pnd file if appended,
 // to the given directory; returns 1 on sucess, otherwise is a fail.
 unsigned char pnd_emit_icon ( char *targetpath, pnd_disco_t *p );
+unsigned char *pnd_emit_icon_to_buffer ( pnd_disco_t *p, unsigned int *r_buflen ); // returns length of malloc in r_buflen if !NULL
 
 // pnd_map_dotdesktop_categories() will attempt to find an appropriate standard .desktop category(s) based
 // on the provided PXML-style category.
diff --git a/lib/pnd_desktop.c b/lib/pnd_desktop.c
index c2cffec..3760fba 100644
--- a/lib/pnd_desktop.c
+++ b/lib/pnd_desktop.c
@@ -393,3 +393,85 @@ char *pnd_map_dotdesktop_category ( pnd_conf_handle c, char *single_category ) {
 
   return ( ret );
 }
+
+unsigned char *pnd_emit_icon_to_buffer ( pnd_disco_t *p, unsigned int *r_buflen ) {
+  // this is shamefully mostly a copy of emit_icon() above; really, need to refactor that to use this routine
+  // with a fwrite at the end...
+  char from [ FILENAME_MAX ];   // source filename
+  char bits [ 8 * 1024 ];
+  unsigned int bitlen;
+  FILE *pnd = NULL;
+  unsigned char *target = NULL, *targiter = NULL;
+
+  // prelim .. if a pnd file, and no offset found, discovery code didn't locate icon.. so bail.
+  if ( ( p -> object_type == pnd_object_type_pnd ) &&
+       ( ! p -> pnd_icon_pos ) )
+  {
+    return ( NULL ); // discover code didn't find it, so FAIL
+  }
+
+  /* first.. open the source file, by type of application:
+   * are we looking through a pnd file or a dir?
+   */
+  if ( p -> object_type == pnd_object_type_directory ) {
+    sprintf ( from, "%s/%s", p -> object_path, p -> icon );
+  } else if ( p -> object_type == pnd_object_type_pnd ) {
+    sprintf ( from, "%s/%s", p -> object_path, p -> object_filename );
+  }
+
+  pnd = fopen ( from, "r" );
+
+  if ( ! pnd ) {
+    return ( NULL );
+  }
+
+  // determine length of file, then adjust by icon position to find begin of icon
+  unsigned int len;
+
+  fseek ( pnd, 0, SEEK_END );
+  len = ftell ( pnd );
+  //fseek ( pnd, 0, SEEK_SET );
+
+  fseek ( pnd, p -> pnd_icon_pos, SEEK_SET );
+
+  len -= p -> pnd_icon_pos;
+
+  // create target buffer
+  target = malloc ( len );
+
+  if ( ! target ) {
+    fclose ( pnd );
+    return ( 0 );
+  }
+
+  targiter = target;
+
+  if ( r_buflen ) {
+    *r_buflen = len;
+  }
+
+  // copy over icon to target
+  while ( len ) {
+
+    if ( len > (8*1024) ) {
+      bitlen = (8*1024);
+    } else {
+      bitlen = len;
+    }
+
+    if ( fread ( bits, bitlen, 1, pnd ) != 1 ) {
+      fclose ( pnd );
+      free ( target );
+      return ( NULL );
+    }
+
+    memmove ( targiter, bits, bitlen );
+    targiter += bitlen;
+
+    len -= bitlen;
+  } // while
+
+  fclose ( pnd );
+
+  return ( target );
+}
-- 
2.39.5