add poor man's BST support

Makefile

@@ -12,7 +12,8 @@ MAKE=gmake
 DEFS=-D_REENTRANT -D_TS_ERRNO -DHMT_PROTECT
 # -DWITH_MPATROL
 
-SRCS=	descriptor.c \
+SRCS=	bst.c \
+	descriptor.c \
 	epg.c \
 	file.c \
 	huffman.c \

bst.c

@@ -0,0 +1,41 @@
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <time.h>
+#include <strings.h>
+
+#include "lint.h"
+
+struct bsttab {
+	time_t tm;
+	int bst;
+};
+
+#include "bst.h"
+
+int
+is_bst(time_t tm)
+{
+	int i, is_bst;
+
+	is_bst = 0;
+	for (i = 0; bst[i].tm; i++)
+	{
+		if (bst[i].tm > tm)
+			break;
+		is_bst = bst[i].bst;
+	}
+
+	return is_bst;
+}
+
+void
+bstise(time_t *tm)
+{
+	if (is_bst(*tm))
+		*tm += 3600;
+}
+

bst.h

@@ -0,0 +1,21 @@
+struct bsttab bst[] = {
+    { 1301187600, 1 },
+    { 1319936400, 0 },
+    { 1332637200, 1 },
+    { 1351386000, 0 },
+    { 1364691600, 1 },
+    { 1382835600, 0 },
+    { 1396141200, 1 },
+    { 1414285200, 0 },
+    { 1427590800, 1 },
+    { 1445734800, 0 },
+    { 1459040400, 1 },
+    { 1477789200, 0 },
+    { 1490490000, 1 },
+    { 1509238800, 0 },
+    { 1521939600, 1 },
+    { 1540688400, 0 },
+    { 1553994000, 1 },
+    { 1572138000, 0 },
+    { 0, 0 },
+};

lint.h

@@ -44,6 +44,9 @@ void free_descriptor(struct descriptor *);
 unsigned char *freeview_huffman_to_string(const unsigned char *, uint,
     unsigned int *);
 
+int is_bst(time_t);
+void bstise(time_t *);
+
 #ifdef sun
 char *strcasestr (char *, char *);
 #endif

main.c

@@ -82,6 +82,7 @@ dump(struct epg *epg __attribute__((unused)),
 	time_t tm;
 
 	tm = mjd(d->start_date, d->start_hour, d->start_min, d->start_sec);
+	bstise(&tm);
 
 	if (ds[PARSER_SHORT_EVENT])
 	{

mkbst

@@ -0,0 +1,17 @@
+#!/bin/sh
+
+# Generate British Summer Time switchover table
+
+year=2011
+
+echo "struct bsttab bst[] = {"
+while [ $year -lt 2020 ]; do
+	dststart=`cal 3 $year | grep '[0-9]' | tail -1 | awk '{print $1}'`
+	dstend=`cal 10 $year | grep '[0-9]' | tail -1 | awk '{print $1}'`
+	echo "    { `date -d ${year}03${dststart}0100 +%s`, 1 },"
+	echo "    { `date -d ${year}10${dstend}0100 +%s`, 0 },"
+	year=`expr $year + 1`
+done
+echo "    { 0, 0 },"
+echo "};"
+