From f62b1f5500a183495e1e80d1485d2a783a37c2b2 Mon Sep 17 00:00:00 2001
From: tradke <tradke@17b73243-c579-4c4c-a9d2-2d5706c11dac>
Date: Fri, 28 Jul 2006 09:57:00 +0000
Subject: Add new flesh API functions CCTK_CompileDateTime() and
 Util_CurrentDateTime() to return a date/time stamp following the ISO 8601
 standard format if possible (see
 http://www.cactuscode.org/old/pipermail/developers/2006-July/004971.html).

Add the timezone information in the time stamp returned by Util_CurrentTime().

You also need to update lib/make/make.configuration now in order to compile
src/datestamp.c.


git-svn-id: http://svn.cactuscode.org/flesh/trunk@4358 17b73243-c579-4c4c-a9d2-2d5706c11dac
---
 src/datestamp.c            | 47 ++++++++++++++++++++++++++++++++++++++++++++
 src/include/cctk_Misc.h    |  1 +
 src/include/cctk_Version.h |  2 ++
 src/util/Time.c            | 49 +++++++++++++++++++++++++++++++++++++++++++++-
 4 files changed, 98 insertions(+), 1 deletion(-)

diff --git a/src/datestamp.c b/src/datestamp.c
index bc73cfd3..7f0dd7b8 100644
--- a/src/datestamp.c
+++ b/src/datestamp.c
@@ -8,6 +8,7 @@
    #version   $Id$
  @@*/
 
+#include <ctype.h>
 #include <stdio.h>
 #include <string.h>
 
@@ -92,6 +93,52 @@ const char *CCTK_CompileDate (void)
 #define REALSTRINGIFY(a) #a
 
 
+ /*@@
+   @routine    CCTK_CompileDateTime
+   @date       21 July 2006
+   @author     Thomas Radke
+   @desc
+               Returns a pointer to a formatted string with the datetime stamp
+               when Cactus was compiled.
+               The format of the string returned tries to be compatible
+               to the machine-processable format defined in ISO 8601 chapt. 5.4
+               however this depends on the actual date command which returns
+               the raw datetime string CCTK_COMPILE_DATETIME
+               in lib/make/make.configuration.
+   @enddesc
+
+   @returntype const char *
+   @returndesc
+               pointer to the static datetime stamp string buffer
+   @endreturndesc
+@@*/
+const char *CCTK_CompileDateTime (void)
+{
+#define DATETIME_BUFLEN sizeof("YYYY-MM-DDThh:mm:ss+hh:mm")
+  const int len = DATETIME_BUFLEN;
+  static char buffer[DATETIME_BUFLEN] = "";
+
+  if (buffer[0] == 0 && sizeof (STRINGIFY (CCTK_COMPILE_DATETIME)) == len-1)
+  {
+    strcpy (buffer, STRINGIFY (CCTK_COMPILE_DATETIME));
+
+    /* if the timezone part is returned as "(+|-)hhmm"
+       then turn it into "(+|-)hh:mm" */
+    if ((buffer[len-7] == '+' || buffer[len-7] == '-') &&
+        isdigit (buffer[len-6]) && isdigit (buffer[len-5]) &&
+        isdigit (buffer[len-4]) && isdigit (buffer[len-3]) &&
+        buffer[len-2] == 0)
+    {
+      buffer[len-2] = buffer[len-3];
+      buffer[len-3] = buffer[len-4];
+      buffer[len-4] = ':';
+    }
+  }
+
+  return (buffer[0] ? buffer : STRINGIFY (CCTK_COMPILE_DATETIME));
+}
+
+
  /*@@
    @routine    CCTK_FullVersion CCTK_MajorVersion CCTK_MinorVersion
    @date       Mon May 11 10:20:58 1998
diff --git a/src/include/cctk_Misc.h b/src/include/cctk_Misc.h
index a51f7a87..6ac16e56 100644
--- a/src/include/cctk_Misc.h
+++ b/src/include/cctk_Misc.h
@@ -45,6 +45,7 @@ int CCTK_SetBoolean(CCTK_INT *data, const char *value);
 int CCTK_RunTime(void);
 int Util_CurrentTime(int len, char *now);
 int Util_CurrentDate(int len, char *now);
+char *Util_CurrentDateTime(void);
 
 int CCTK_RunTitle(int len, char *title);
 
diff --git a/src/include/cctk_Version.h b/src/include/cctk_Version.h
index d010c9a3..efe1ee59 100644
--- a/src/include/cctk_Version.h
+++ b/src/include/cctk_Version.h
@@ -33,6 +33,8 @@ const char *CCTK_CompileTime(void);
 
 const char *CCTK_CompileDate(void);
 
+const char *CCTK_CompileDateTime(void);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/src/util/Time.c b/src/util/Time.c
index b902622f..f71b3fdb 100644
--- a/src/util/Time.c
+++ b/src/util/Time.c
@@ -10,7 +10,9 @@
 
 /* #define DEBUG_TIME */
 
+#include <ctype.h>
 #include <time.h>
+#include <stdlib.h>
 #include <string.h>
 
 #include "cctk_Flesh.h"
@@ -45,7 +47,7 @@ int Util_CurrentTime(int len, char *now)
 {
   int retval;
   time_t timep;
-  const char *fmt = "%X";
+  const char *fmt = "%X%z";
 
   timep = time(NULL);
   strftime(now, len, fmt, localtime(&timep));
@@ -96,3 +98,48 @@ int Util_CurrentDate(int len, char *now)
   return retval;
 }
 
+
+
+ /*@@
+   @routine    Util_CurrentDateTime
+   @date       Wed 19 July 2006
+   @author     Thomas Radke
+   @desc
+               Returns the current datetime in a machine-processable format
+               as defined in ISO 8601 chapter 5.4.
+   @enddesc
+
+   @returntype char *
+   @returndesc
+               pointer to an allocated string buffer containing the datetime,
+               must be freed by the user
+   @endreturndesc
+@@*/
+char *Util_CurrentDateTime(void)
+{
+  char *buffer;
+  time_t timep;
+  const int len = sizeof ("YYYY-MM-DDThh:mm:ss+hh:mm");
+  const char *fmt = "%Y-%m-%dT%H:%M:%S%z";
+
+  buffer = calloc (1, len);
+  if (buffer)
+  {
+    timep = time (NULL);
+    strftime (buffer, len, fmt, localtime (&timep));
+
+    /* if the timezone part is returned as "(+|-)hhmm"
+       then turn it into "(+|-)hh:mm" */
+    if ((buffer[len-7] == '+' || buffer[len-7] == '-') &&
+        isdigit (buffer[len-6]) && isdigit (buffer[len-5]) &&
+        isdigit (buffer[len-4]) && isdigit (buffer[len-3]) &&
+        buffer[len-2] == 0)
+    {
+      buffer[len-2] = buffer[len-3];
+      buffer[len-3] = buffer[len-4];
+      buffer[len-4] = ':';
+    }
+  }
+
+  return (buffer);
+}
-- 
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