This commit was manufactured by cvs2svn to create branch

'GNUPG-1-9-BRANCH'.

1 files changed, 250 insertions, 0 deletions

diff --git a/common/gettime.c b/common/gettime.c
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+/* gettime.c - Wrapper for time functions
+ *	Copyright (C) 1998, 2002 Free Software Foundation, Inc.
+ *
+ * This file is part of GnuPG.
+ *
+ * GnuPG is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * GnuPG is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
+ */
+
+#include <config.h>
+#include <stdlib.h>
+#include <time.h>
+#ifdef HAVE_LANGINFO_H
+#include <langinfo.h>
+#endif
+
+#include "util.h"
+
+static unsigned long timewarp;
+static enum { NORMAL = 0, FROZEN, FUTURE, PAST } timemode;
+
+/* Wrapper for the time(3).  We use this here so we can fake the time
+   for tests */
+time_t 
+gnupg_get_time () 
+{
+  time_t current = time (NULL);
+  if (timemode == NORMAL)
+    return current;
+  else if (timemode == FROZEN)
+    return timewarp;
+  else if (timemode == FUTURE)
+    return current + timewarp;
+  else
+    return current - timewarp;
+}
+
+/* set the time to NEWTIME so that gnupg_get_time returns a time
+   starting with this one.  With FREEZE set to 1 the returned time
+   will never change.  Just for completeness, a value of (time_t)-1
+   for NEWTIME gets you back to rality. Note that this is obviously
+   not thread-safe but this is not required. */
+void
+gnupg_set_time (time_t newtime, int freeze)
+{
+  time_t current = time (NULL);
+
+  if ( newtime == (time_t)-1 || current == newtime)
+    {
+      timemode = NORMAL;
+      timewarp = 0;
+    }
+  else if (freeze)
+    {
+      timemode = FROZEN;
+      timewarp = current;
+    }
+  else if (newtime > current)
+    {
+      timemode = FUTURE;
+      timewarp = newtime - current;
+    }
+  else
+    {
+      timemode = PAST;
+      timewarp = current - newtime;
+    }
+}
+
+/* Returns true when we are in timewarp mode */
+int
+gnupg_faked_time_p (void)
+{
+  return timemode;
+}
+
+
+/* This function is used by gpg because OpenPGP defines the timestamp
+   as an unsigned 32 bit value. */
+u32 
+make_timestamp (void)
+{
+  time_t t = gnupg_get_time ();
+
+  if (t == (time_t)-1)
+    log_fatal ("gnupg_get_time() failed\n");
+  return (u32)t;
+}
+
+
+
+/****************
+ * Scan a date string and return a timestamp.
+ * The only supported format is "yyyy-mm-dd"
+ * Returns 0 for an invalid date.
+ */
+u32
+scan_isodatestr( const char *string )
+{
+    int year, month, day;
+    struct tm tmbuf;
+    time_t stamp;
+    int i;
+
+    if( strlen(string) != 10 || string[4] != '-' || string[7] != '-' )
+	return 0;
+    for( i=0; i < 4; i++ )
+	if( !digitp (string+i) )
+	    return 0;
+    if( !digitp (string+5) || !digitp(string+6) )
+	return 0;
+    if( !digitp(string+8) || !digitp(string+9) )
+	return 0;
+    year = atoi(string);
+    month = atoi(string+5);
+    day = atoi(string+8);
+    /* some basic checks */
+    if( year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 )
+	return 0;
+    memset( &tmbuf, 0, sizeof tmbuf );
+    tmbuf.tm_mday = day;
+    tmbuf.tm_mon = month-1;
+    tmbuf.tm_year = year - 1900;
+    tmbuf.tm_isdst = -1;
+    stamp = mktime( &tmbuf );
+    if( stamp == (time_t)-1 )
+	return 0;
+    return stamp;
+}
+
+
+u32
+add_days_to_timestamp( u32 stamp, u16 days )
+{
+    return stamp + days*86400L;
+}
+
+
+/****************
+ * Return a string with a time value in the form: x Y, n D, n H
+ */
+
+const char *
+strtimevalue( u32 value )
+{
+    static char buffer[30];
+    unsigned int years, days, hours, minutes;
+
+    value /= 60;
+    minutes = value % 60;
+    value /= 60;
+    hours = value % 24;
+    value /= 24;
+    days = value % 365;
+    value /= 365;
+    years = value;
+
+    sprintf(buffer,"%uy%ud%uh%um", years, days, hours, minutes );
+    if( years )
+	return buffer;
+    if( days )
+	return strchr( buffer, 'y' ) + 1;
+    return strchr( buffer, 'd' ) + 1;
+}
+
+
+/****************
+ * Note: this function returns GMT
+ */
+const char *
+strtimestamp( u32 stamp )
+{
+    static char buffer[11+5];
+    struct tm *tp;
+    time_t atime = stamp;
+    
+    if (atime < 0) {
+        strcpy (buffer, "????" "-??" "-??");
+    }
+    else {
+        tp = gmtime( &atime );
+        sprintf(buffer,"%04d-%02d-%02d",
+                1900+tp->tm_year, tp->tm_mon+1, tp->tm_mday );
+    }
+    return buffer;
+}
+
+/****************
+ * Note: this function returns local time
+ */
+const char *
+asctimestamp( u32 stamp )
+{
+    static char buffer[50];
+#if defined (HAVE_STRFTIME) && defined (HAVE_NL_LANGINFO)
+      static char fmt[50];
+#endif
+    struct tm *tp;
+    time_t atime = stamp;
+
+    if (atime < 0) {
+        strcpy (buffer, "????" "-??" "-??");
+        return buffer;
+    }
+
+    tp = localtime( &atime );
+#ifdef HAVE_STRFTIME
+#if defined(HAVE_NL_LANGINFO)
+      mem2str( fmt, nl_langinfo(D_T_FMT), DIM(fmt)-3 );
+      if( strstr( fmt, "%Z" ) == NULL )
+	strcat( fmt, " %Z");
+      strftime( buffer, DIM(buffer)-1, fmt, tp );
+#else
+      /* fixme: we should check whether the locale appends a " %Z"
+       * These locales from glibc don't put the " %Z":
+       * fi_FI hr_HR ja_JP lt_LT lv_LV POSIX ru_RU ru_SU sv_FI sv_SE zh_CN
+       */
+      strftime( buffer, DIM(buffer)-1, "%c %Z", tp );
+#endif
+    buffer[DIM(buffer)-1] = 0;
+#else
+    mem2str( buffer, asctime(tp), DIM(buffer) );
+#endif
+    return buffer;
+}
+
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