Print modification date in file listings

This also adds a helper function to load the DOS date/time into a tm
structure and an library function to get the ISO 8601 date

lib/file.c

@@ -963,6 +963,30 @@ size_t unshield_file_size(Unshield* unshield, int index)/*{{{*/
     return 0;
 }/*}}}*/
 
+/* This uses the ISO 8601 date format (except for milliseconds) */
+bool unshield_file_iso_date (Unshield* unshield, int index, char* buf, size_t size)/*{{{*/
+{
+  FileDescriptor* fd = unshield_get_file_descriptor(unshield, index);
+  struct tm date;
+
+  if (size < 32)
+  {
+    unshield_error("Buffer size %" SIZE_FORMAT " is too small", size);
+    return false;
+  }
+
+  if (fd)
+    unshield_dos_to_tm(fd->dos_date, fd->dos_time, &date);
+  else
+  {
+    unshield_warning("Failed to get file descriptor %i", index);
+    memset(&date, 0, sizeof(date));
+  }
+
+  (void)strftime(buf, size, "%Y-%m-%d %H:%M:%S", &date);
+  return fd ? true : false;
+}/*}}}*/
+
 bool unshield_file_save_raw(Unshield* unshield, int index, const char* filename)
 {
   /* XXX: Thou Shalt Not Cut & Paste... */

lib/helper.c

@@ -268,4 +268,26 @@ const char* unshield_header_get_string(Header* header, uint32_t offset)
   return unshield_get_utf8_string(header, unshield_header_get_buffer(header, offset));
 }
 
+/**
+  Based on MIT Wine code and DosDateTimeToFileTime() MSDN documentation
+ */
+void unshield_dos_to_tm(uint16_t dos_date, uint16_t dos_time, struct tm* tm)
+{
+  memset(tm, 0, sizeof(*tm));
+
+  if (dos_date)
+  {
+    tm->tm_year = (dos_date >> 9) + 80;
+    tm->tm_mon = ((dos_date >> 5) & 0x0f) - 1;
+    tm->tm_mday = dos_date & 0x1f;
+  }
+
+  if (dos_time)
+  {
+    tm->tm_hour = dos_time >> 11;
+    tm->tm_min = (dos_time >> 5) & 0x3f;
+    tm->tm_sec = (dos_time & 0x1f) * 2;
+  }
+}
+
 

lib/internal.h

@@ -87,6 +87,8 @@ const char* unshield_header_get_string(Header* header, uint32_t offset);
 uint8_t* unshield_header_get_buffer(Header* header, uint32_t offset);
 char *unshield_get_last_path_separator(char *path);
 
+void unshield_dos_to_tm(uint16_t dos_date, uint16_t dos_time, struct tm* tm);
+
 static inline void* unshield_fopen(Unshield* unshield, const char *filename, const char *modes)
 {
     return unshield->io_callbacks->fopen(filename, modes, unshield->io_userdata);

lib/libunshield.h

@@ -3,6 +3,7 @@
 
 #include <stdbool.h>
 #include <stddef.h>
+#include <time.h>
 
 #define UNSHIELD_LOG_LEVEL_LOWEST    0
 
@@ -108,6 +109,7 @@ UNSHIELD_API bool        unshield_file_is_valid      (Unshield* unshield, int in
 UNSHIELD_API bool        unshield_file_save          (Unshield* unshield, int index, const char* filename);
 UNSHIELD_API int         unshield_file_directory     (Unshield* unshield, int index);
 UNSHIELD_API size_t      unshield_file_size          (Unshield* unshield, int index);
+UNSHIELD_API bool        unshield_file_iso_date      (Unshield* unshield, int index, char* buf, size_t size);
 
 /** For investigation of compressed data */
 UNSHIELD_API bool unshield_file_save_raw(Unshield* unshield, int index, const char* filename);

src/unshield.c

@@ -683,11 +683,14 @@ static int list_files_helper(Unshield* unshield, const char* prefix, int first,
   for (i = first; i <= last; i++)
   {
     char dirname[4096];
+    char date[32];
 
     if (unshield_file_is_valid(unshield, i) && should_process_file(unshield, i))
     {
       valid_count++;
 
+      (void)unshield_file_iso_date(unshield, i, date, sizeof(date));
+
       if (prefix && prefix[0])
       {
         strcpy(dirname, prefix);
@@ -708,10 +711,11 @@ static int list_files_helper(Unshield* unshield, const char* prefix, int first,
       if (dirname[strlen(dirname)-1] != '\\')
         strcat(dirname, "\\");
 
-      printf(" %8" SIZE_FORMAT "  %s%s\n",
+      printf(" %8" SIZE_FORMAT "  %s  %s%s\n",
           unshield_file_size(unshield, i),
+          date,
           dirname,
-          unshield_file_name(unshield, i)); 
+          unshield_file_name(unshield, i));
     }
   }
 
@@ -748,7 +752,7 @@ static bool do_action(Unshield* unshield, ActionHelper helper)
     }
   }
 
-  printf(" --------  -------\n          %i files\n", count);
+  printf(" --------  -------------------  -------\n          %i files\n", count);
 
   return true;
 }