From b44d840bfb55c015d107efbeb7c3e7816775b343 Mon Sep 17 00:00:00 2001
From: sjplimp <sjplimp@f3b2605a-c512-4ea7-a41b-209d697bcdaa>
Date: Wed, 9 Mar 2011 21:19:59 +0000
Subject: [PATCH] git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@5774
 f3b2605a-c512-4ea7-a41b-209d697bcdaa

---
 src/dump.cpp | 17 +++++++++++++++--
 src/dump.h   |  3 ++-
 2 files changed, 17 insertions(+), 3 deletions(-)

diff --git a/src/dump.cpp b/src/dump.cpp
index d082ac29d6..14a9e4288f 100644
--- a/src/dump.cpp
+++ b/src/dump.cpp
@@ -70,6 +70,7 @@ Dump::Dump(LAMMPS *lmp, int narg, char **arg) : Pointers(lmp)
   clearstep = 0;
   sort_flag = 0;
   append_flag = 0;
+  padflag = 0;
 
   maxbuf = maxids = maxsort = maxproc = 0;
   buf = bufsort = NULL;
@@ -359,8 +360,15 @@ void Dump::openfile()
     filecurrent = new char[strlen(filename) + 16];
     char *ptr = strchr(filename,'*');
     *ptr = '\0';
-    sprintf(filecurrent,"%s" BIGINT_FORMAT "%s",
-	    filename,update->ntimestep,ptr+1);
+    if (padflag == 0) 
+      sprintf(filecurrent,"%s" BIGINT_FORMAT "%s",
+	      filename,update->ntimestep,ptr+1);
+    else {
+      char bif[8],pad[16];
+      strcpy(bif,BIGINT_FORMAT);
+      sprintf(pad,"%%s%%0%d%s%%s",padflag,&bif[1]);
+      sprintf(filecurrent,pad,filename,update->ntimestep,ptr+1);
+    }
     *ptr = '*';
   }
 
@@ -666,6 +674,11 @@ void Dump::modify_params(int narg, char **arg)
 	strcpy(format_user,arg[iarg+1]);
       }
       iarg += 2;
+    } else if (strcmp(arg[iarg],"pad") == 0) {
+      if (iarg+2 > narg) error->all("Illegal dump_modify command");
+      padflag = atoi(arg[iarg+1]);
+      if (padflag < 0) error->all("Illegal dump_modify command");
+      iarg += 2;
     } else if (strcmp(arg[iarg],"sort") == 0) {
       if (iarg+2 > narg) error->all("Illegal dump_modify command");
       if (strcmp(arg[iarg+1],"off") == 0) sort_flag = 0;
diff --git a/src/dump.h b/src/dump.h
index 0f50c20bfa..1dd7a6e5a9 100644
--- a/src/dump.h
+++ b/src/dump.h
@@ -36,7 +36,7 @@ class Dump : protected Pointers {
   Dump(class LAMMPS *, int, char **);
   virtual ~Dump();
   void init();
-  void write();
+  virtual void write();
   void modify_params(int, char **);
   virtual double memory_usage();
 
@@ -53,6 +53,7 @@ class Dump : protected Pointers {
   int flush_flag;            // 0 if no flush, 1 if flush every dump
   int sort_flag;             // 1 if sorted output
   int append_flag;           // 1 if open file in append mode, 0 if not
+  int padflag;               // timestep padding in filename
   int singlefile_opened;     // 1 = one big file, already opened, else 0
   int sortcol;               // 0 to sort on ID, 1-N on columns
   int sortcolm1;             // sortcol - 1