X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Usermode%2FLibraries%2Flibc.so_src%2Ftime.c;h=412475b3a8f6f1fe30c7be042574af8328411fd2;hb=b99e0f9bd0dfcf6f1b3d33534ea78f8fb33be92a;hp=aa4b2de8c2431ebdab2e54bf3679a5d177c9fd1a;hpb=e632a3212d1767a18a74e7a7c35f52c8a1a784d2;p=tpg%2Facess2.git

diff --git a/Usermode/Libraries/libc.so_src/time.c b/Usermode/Libraries/libc.so_src/time.c
index aa4b2de8..412475b3 100644
--- a/Usermode/Libraries/libc.so_src/time.c
+++ b/Usermode/Libraries/libc.so_src/time.c
@@ -7,6 +7,7 @@
  */
 #include <time.h>
 #include <acess/sys.h>
+#include <string.h>
 
 clock_t clock(void)
 {
@@ -20,3 +21,71 @@ time_t time(time_t *t)
 		*t = ret;
 	return ret;
 }
+
+static struct tm	static_tm;
+
+struct tm *localtime(const time_t *timer)
+{
+	struct tm *ret = &static_tm;
+
+	// TODO: This breaks on negative timestamps
+
+	int64_t	day = *timer / (1000*60*60*24);
+	int64_t	iday = *timer % (1000*60*60*24);	
+
+	ret->tm_sec = (iday / 1000) % 60;;
+	ret->tm_min = (iday / (1000*60)) % 60;
+	ret->tm_hour = (iday / (1000*60*60));
+	ret->tm_year = 0;
+	ret->tm_mon = 0;
+	ret->tm_mday = 0;
+	ret->tm_wday = (day + 6) % 7;	// 1 Jan 2000 was a saturday
+	ret->tm_yday = 0;
+	ret->tm_isdst = 0;	// Fuck DST
+	return ret;
+}
+
+static inline size_t MIN(size_t a, size_t b) { return a < b ? a : b; }
+static size_t _puts(char * restrict s, size_t maxsize, size_t ofs, const char *str, size_t len)
+{
+	if( s && ofs < maxsize ) {
+		size_t	addlen = MIN(len, maxsize-1-ofs);
+		memcpy(s+ofs, str, addlen);
+	}
+	return len;
+}
+
+size_t strftime(char*restrict s, size_t maxsize, const char*restrict format, const struct tm*restrict timeptr)
+{
+	size_t	ofs = 0;
+
+	while( *format )
+	{
+		const char *restrict start = format;
+		while( *format && *format != '%' )
+			format ++;
+		if( format != start )
+			ofs += _puts(s, maxsize, ofs, start, format-start);
+		if( *format == 0 )
+			break;
+		format ++;
+		switch(*format++)
+		{
+		case 0:	format--;	break;
+		case '%':	ofs += _puts(s, maxsize, ofs, format-1, 1);	break;
+		case 'd':	// The day of the month as a decimal number (range 01 to 31).
+			{
+			char tmp[2] = {'0','0'};
+			tmp[0] += (timeptr->tm_mday / 10) % 10;
+			tmp[1] += timeptr->tm_mday % 10;
+			ofs += _puts(s, maxsize, ofs, tmp, 2);
+			}
+			break;
+		default:
+			_SysDebug("TODO: strftime('...%%%c...')", format[-1]);
+			break;
+		}
+	}
+	
+	return ofs;
+}