summary refs log tree commit diff
path: root/time/strftime.c
diff options
context:
space:
mode:
Diffstat (limited to 'time/strftime.c')
-rw-r--r--time/strftime.c204
1 files changed, 142 insertions, 62 deletions
diff --git a/time/strftime.c b/time/strftime.c
index c47fc07548..40a7a747cf 100644
--- a/time/strftime.c
+++ b/time/strftime.c
@@ -21,22 +21,57 @@ License along with the GNU C Library; see the file COPYING.LIB.  If
 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
 Cambridge, MA 02139, USA.  */
 
-#include <ansidecl.h>
-#include "../locale/localeinfo.h"
-#include <ctype.h>
-#include <limits.h>
-#include <stddef.h>
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#ifdef _LIBC
+# define HAVE_LIMITS_H 1
+# define HAVE_MBLEN 1
+# define HAVE_TM_ZONE 1
+# define STDC_HEADERS 1
+# include <ansidecl.h>
+# include "../locale/localeinfo.h"
+#endif
+
 #include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
+#include <sys/types.h>		/* Some systems define `time_t' here.  */
 #include <time.h>
 
-#ifndef	HAVE_GNU_LD
-#define	__tzname	tzname
-#define	__daylight	daylight
-#define	__timezone	timezone
+#if HAVE_MBLEN
+# include <ctype.h>
+#endif
+
+#if HAVE_LIMITS_H
+# include <limits.h>
 #endif
 
+#if STDC_HEADERS
+# include <stddef.h>
+# include <stdlib.h>
+# include <string.h>
+#else
+# define memcpy(d, s, n) bcopy (s, d, n)
+#endif
+
+#ifndef __P
+#if defined (__GNUC__) || (defined (__STDC__) && __STDC__)
+#define __P(args) args
+#else
+#define __P(args) ()
+#endif  /* GCC.  */
+#endif  /* Not __P.  */
+
+#ifndef PTR
+#ifdef __STDC__
+#define PTR void *
+#else
+#define PTR char *
+#endif
+#endif
+
+static unsigned int week __P((const struct tm *const, int));
+
 
 #define	add(n, f)							      \
   do									      \
@@ -45,14 +80,19 @@ Cambridge, MA 02139, USA.  */
       if (i >= maxsize)							      \
 	return 0;							      \
       else								      \
-	if (p != NULL)							      \
+	if (p)								      \
 	  {								      \
 	    f;								      \
 	    p += (n);							      \
 	  }								      \
     } while (0)
 #define	cpy(n, s)	add((n), memcpy((PTR) p, (PTR) (s), (n)))
+
+#ifdef _LIBC
 #define	fmt(n, args)	add((n), if (sprintf args != (n)) return 0)
+#else
+#define	fmt(n, args)	add((n), sprintf args; if (strlen (p) != (n)) return 0)
+#endif
 
 /* Return the week in the year specified by TP,
    with weeks starting on STARTING_DAY.  */
@@ -60,8 +100,9 @@ Cambridge, MA 02139, USA.  */
 inline
 #endif
 static unsigned int
-DEFUN(week, (tp, starting_day),
-      CONST struct tm *CONST tp AND int starting_day)
+week (tp, starting_day)
+      const struct tm *const tp;
+      int starting_day;
 {
   int wday, dl;
 
@@ -78,6 +119,18 @@ DEFUN(week, (tp, starting_day),
   return dl <= 0 ? 0 : ((dl / 7) + ((dl % 7) == 0 ? 0 : 1));
 }
 
+#ifndef _NL_CURRENT
+static char const weekday_name[][10] =
+  {
+    "Sunday", "Monday", "Tuesday", "Wednesday",
+    "Thursday", "Friday", "Saturday"
+  };
+static char const month_name[][10] =
+  {
+    "January", "February", "March", "April", "May", "June",
+    "July", "August", "September", "October", "November", "December"
+  };
+#endif
 
 /* Write information from TP into S according to the format
    string FORMAT, writing no more that MAXSIZE characters
@@ -86,40 +139,55 @@ DEFUN(week, (tp, starting_day),
    anywhere, so to determine how many characters would be
    written, use NULL for S and (size_t) UINT_MAX for MAXSIZE.  */
 size_t
-DEFUN(strftime, (s, maxsize, format, tp),
-      char *s AND size_t maxsize AND
-      CONST char *format AND register CONST struct tm *tp)
+strftime (s, maxsize, format, tp)
+      char *s;
+      size_t maxsize;
+      const char *format;
+      register const struct tm *tp;
 {
-  CONST char *CONST a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday);
-  CONST char *CONST f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday);
-  CONST char *CONST a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon);
-  CONST char *CONST f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon);
+  int hour12 = tp->tm_hour;
+#ifdef _NL_CURRENT
+  const char *const a_wkday = _NL_CURRENT (LC_TIME, ABDAY_1 + tp->tm_wday);
+  const char *const f_wkday = _NL_CURRENT (LC_TIME, DAY_1 + tp->tm_wday);
+  const char *const a_month = _NL_CURRENT (LC_TIME, ABMON_1 + tp->tm_mon);
+  const char *const f_month = _NL_CURRENT (LC_TIME, MON_1 + tp->tm_mon);
+  const char *const ampm = _NL_CURRENT (LC_TIME,
+					hour12 > 12 ? PM_STR : AM_STR);
   size_t aw_len = strlen(a_wkday);
   size_t am_len = strlen(a_month);
+  size_t ap_len = strlen (ampm);
+#else
+  const char *const f_wkday = weekday_name[tp->tm_wday];
+  const char *const f_month = month_name[tp->tm_mon];
+  const char *const a_wkday = f_wkday;
+  const char *const a_month = f_month;
+  const char *const ampm = "AMPM" + 2 * (hour12 > 12);
+  size_t aw_len = 3;
+  size_t am_len = 3;
+  size_t ap_len = 2;
+#endif
   size_t wkday_len = strlen(f_wkday);
   size_t month_len = strlen(f_month);
-  int hour12 = tp->tm_hour;
-  CONST char *CONST ampm = _NL_CURRENT (LC_TIME,
-					hour12 > 12 ? PM_STR : AM_STR);
-  size_t ap_len = strlen (ampm);
-  CONST unsigned int y_week0 = week (tp, 0);
-  CONST unsigned int y_week1 = week (tp, 1);
-  CONST char *zone;
+  const unsigned int y_week0 = week (tp, 0);
+  const unsigned int y_week1 = week (tp, 1);
+  const char *zone;
   size_t zonelen;
   register size_t i = 0;
   register char *p = s;
-  register CONST char *f;
+  register const char *f;
 
-  if (tp->tm_isdst < 0)
-    {
-      zone = "";
-      zonelen = 0;
-    }
-  else
-    {
-      zone = __tzname[tp->tm_isdst];
-      zonelen = strlen(zone);
-    }
+  zone = 0;
+#if HAVE_TM_ZONE
+  zone = (const char *) tp->tm_zone;
+#endif
+#if HAVE_TZNAME
+  if (!(zone && *zone) && tp->tm_isdst >= 0)
+    zone = tzname[tp->tm_isdst];
+#endif
+  if (!(zone && *zone))
+    zone = "???";
+
+  zonelen = strlen (zone);
 
   if (hour12 > 12)
     hour12 -= 12;
@@ -128,8 +196,9 @@ DEFUN(strftime, (s, maxsize, format, tp),
 
   for (f = format; *f != '\0'; ++f)
     {
-      CONST char *subfmt;
+      const char *subfmt;
 
+#if HAVE_MBLEN
       if (!isascii(*f))
 	{
 	  /* Non-ASCII, may be a multibyte.  */
@@ -140,6 +209,7 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	      continue;
 	    }
 	}
+#endif
 
       if (*f != '%')
 	{
@@ -173,24 +243,36 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	  break;
 
 	case 'c':
+#ifdef _NL_CURRENT
 	  subfmt = _NL_CURRENT (LC_TIME, D_T_FMT);
+#else
+	  subfmt = "%a %b %d %H:%M:%S %Z %Y";
+#endif
 	subformat:
 	  {
 	    size_t len = strftime (p, maxsize - i, subfmt, tp);
+	    if (len == 0 && *subfmt)
+	      return 0;
 	    add(len, );
 	  }
 	  break;
 
 	case 'C':
-	  fmt (2, (p, "%.2d", (1900 + tp->tm_year) / 100));
+	  fmt (2, (p, "%02d", (1900 + tp->tm_year) / 100));
 	  break;
 
+	case 'x':
+#ifdef _NL_CURRENT
+	  subfmt = _NL_CURRENT (LC_TIME, D_FMT);
+	  goto subformat;
+#endif
+	  /* Fall through.  */
 	case 'D':		/* GNU extension.  */
 	  subfmt = "%m/%d/%y";
 	  goto subformat;
 
 	case 'd':
-	  fmt(2, (p, "%.2d", tp->tm_mday));
+	  fmt(2, (p, "%02d", tp->tm_mday));
 	  break;
 
 	case 'e':		/* GNU extension: %d, but blank-padded.  */
@@ -198,11 +280,11 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	  break;
 
 	case 'H':
-	  fmt(2, (p, "%.2d", tp->tm_hour));
+	  fmt(2, (p, "%02d", tp->tm_hour));
 	  break;
 
 	case 'I':
-	  fmt(2, (p, "%.2d", hour12));
+	  fmt(2, (p, "%02d", hour12));
 	  break;
 
 	case 'k':		/* GNU extension.  */
@@ -214,15 +296,15 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	  break;
 
 	case 'j':
-	  fmt(3, (p, "%.3d", 1 + tp->tm_yday));
+	  fmt(3, (p, "%03d", 1 + tp->tm_yday));
 	  break;
 
 	case 'M':
-	  fmt(2, (p, "%.2d", tp->tm_min));
+	  fmt(2, (p, "%02d", tp->tm_min));
 	  break;
 
 	case 'm':
-	  fmt(2, (p, "%.2d", tp->tm_mon + 1));
+	  fmt(2, (p, "%02d", tp->tm_mon + 1));
 	  break;
 
 	case 'n':		/* GNU extension.  */
@@ -242,9 +324,15 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	  goto subformat;
 
 	case 'S':
-	  fmt(2, (p, "%.2d", tp->tm_sec));
+	  fmt(2, (p, "%02d", tp->tm_sec));
 	  break;
 
+	case 'X':
+#ifdef _NL_CURRENT
+	  subfmt = _NL_CURRENT (LC_TIME, T_FMT);
+	  goto subformat;
+#endif
+	  /* Fall through.  */
 	case 'T':		/* GNU extenstion.  */
 	  subfmt = "%H:%M:%S";
 	  goto subformat;
@@ -254,31 +342,23 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	  break;
 
 	case 'U':
-	  fmt(2, (p, "%.2u", y_week0));
+	  fmt(2, (p, "%02u", y_week0));
 	  break;
 
 	case 'W':
-	  fmt(2, (p, "%.2u", y_week1));
+	  fmt(2, (p, "%02u", y_week1));
 	  break;
 
 	case 'w':
-	  fmt(2, (p, "%.2d", tp->tm_wday));
+	  fmt(2, (p, "%02d", tp->tm_wday));
 	  break;
 
-	case 'X':
-	  subfmt = _NL_CURRENT (LC_TIME, T_FMT);
-	  goto subformat;
-
-	case 'x':
-	  subfmt = _NL_CURRENT (LC_TIME, D_FMT);
-	  goto subformat;
-
 	case 'Y':
-	  fmt(4, (p, "%.4d", 1900 + tp->tm_year));
+	  fmt(4, (p, "%04d", 1900 + tp->tm_year));
 	  break;
 
 	case 'y':
-	  fmt(2, (p, "%.2d", tp->tm_year % 100));
+	  fmt(2, (p, "%02d", tp->tm_year % 100));
 	  break;
 
 	case 'Z':
@@ -291,7 +371,7 @@ DEFUN(strftime, (s, maxsize, format, tp),
 	}
     }
 
-  if (p != NULL)
+  if (p)
     *p = '\0';
   return i;
 }
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-11-27 12:19:13 +0000