1 files changed, 84 insertions, 0 deletions
diff --git a/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/tzmap.c b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/tzmap.c
new file mode 100644
index 0000000..8db6cb2
--- /dev/null
+++ b/riemann.fmi.uni-sofia.bg/ngetty/ngetty-1.1/tzmap.c
@@ -0,0 +1,84 @@
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+// #define TZ_MMAP
+
+static unsigned char *T;
+static int L=-1;
+static time_t left, right, tz;
+
+static time_t parse(unsigned char *x)
+  {return (x[0]<<24) | (x[1]<<16) | (x[2]<<8) | x[3];}
+
+static time_t parse_localtime(time_t t) {
+  unsigned char *tmp,*x,tzh_typecnt;
+  int i,tzh_timecnt;
+
+  if (!T || L<44 || parse(T) != 1415211366) goto ready;
+  tzh_timecnt = parse(T+32) & 0xfff;
+  tzh_typecnt = parse(T+36);
+  i = 44 + 4*tzh_timecnt;
+  if (i + tzh_timecnt + 6*tzh_typecnt > L) goto ready;
+
+  x =T +i;
+  tmp =x;
+  for (i=tzh_timecnt; 0<i;) {
+    i--;
+    tmp -= 4;
+    left =parse(tmp);
+    if (t < left) {
+      right = left;
+      continue;
+    }
+    if (x[i] >= tzh_typecnt) goto ready;
+    tz = parse(x +tzh_timecnt +6*x[i]);
+    return tz;
+  }
+ ready:
+  right=left;
+  return 0;
+}
+
+#ifndef TZ_MMAP
+#include <alloca.h>
+#include <sys/stat.h>
+#include "scan_defs.h"
+#include "opts__defs.h"
+
+time_t get_tz(time_t t) /*EXTRACT_INCL*/{
+  struct stat st;
+  int fd;
+  char *tzfile = Oo[Otz];
+  if (*tzfile != '/') return x_atoi(tzfile);
+  if (left <= t && t < right) return tz;
+  fd=open(tzfile,O_RDONLY);
+  if (fd>=0) {
+    if (fstat(fd, &st)) goto error;
+    L = st.st_size;
+    T = alloca(L);
+    if (!T) goto error;
+    if (const_io((int(*)())read,fd,T,L))
+      { error: close(fd); return 0; }
+    close(fd);
+  }
+  return parse_localtime(t);
+}
+
+#else
+#include <sys/mman.h>
+time_t get_tz(time_t t) {
+  int fd;
+  if (left <= t && t < right) return tz;
+  if (!T) {
+    char *map;
+    if ((fd=open("/etc/localtime",O_RDONLY))>=0) {
+      L=lseek(fd,0,SEEK_END);
+      map=mmap(0,L,PROT_READ,MAP_SHARED,fd,0);
+      if (map==(char*)-1) map=0;
+      close(fd);
+      T=(unsigned char *)map;
+    }
+  }
+  return parse_localtime(t);
+}
+#endif