Use var_InheritString for --decklink-video-connection.

[vlc] / compat / nrand48.c

diff --git a/compat/nrand48.c b/compat/nrand48.c
index 9498ef0e625aef645302a49d0bc5df4e3175f623..ff4e9b138dd0a435ac285d31c9391b3fe751354c 100644 (file)
--- a/compat/nrand48.c
+++ b/compat/nrand48.c
@@ -1,5 +1,5 @@
 /*****************************************************************************
- * nrand48.c: POSIX nrand48() replacement
+ * nrand48.c: POSIX erand48(), jrand48() and nrand48() replacements
  *****************************************************************************
  * Copyright © 2010 Rémi Denis-Courmont
  *
@@ -24,9 +24,9 @@
 
 #include <inttypes.h>
 
-long nrand48 (unsigned short subi[3])
+static uint64_t iterate48 (unsigned short subi[3])
 {
-    const uint64_t a = UINT64_C(0x5DEECE66D16);
+    const uint64_t a = UINT64_C(0x5DEECE66D);
     const unsigned c = 13;
     const uint64_t mask = UINT64_C(0xFFFFFFFFFFFF); // 48 bits
 
@@ -42,5 +42,21 @@ long nrand48 (unsigned short subi[3])
     subi[1] = (x >> 16) & 0xFFFF;
     subi[2] = (x >>  0) & 0XFFFF;
 
-    return x >> 16;
+    return x;
+}
+
+double erand48 (unsigned short subi[3])
+{
+    uint64_t r = iterate48 (subi);
+    return ((double)r) / 281474976710655.;
+}
+
+long jrand48 (unsigned short subi[3])
+{
+    return ((int64_t)iterate48 (subi)) >> 16;
+}
+
+long nrand48 (unsigned short subi[3])
+{
+    return iterate48 (subi) >> 17;
 }