Fallback to srand/rand if srandom/random are missing

nih-at · Jul 24, 2023 · 3a61d6a · 3a61d6a
1 parent c788c92
commit 3a61d6a
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diff --git a/CMakeLists.txt b/CMakeLists.txt
@@ -117,6 +117,7 @@ check_function_exists(getprogname HAVE_GETPROGNAME)
 check_symbol_exists(localtime_r time.h HAVE_LOCALTIME_R)
 check_symbol_exists(localtime_s time.h HAVE_LOCALTIME_S)
 check_function_exists(memcpy_s HAVE_MEMCPY_S)
+check_function_exists(random HAVE_RANDOM)
 check_function_exists(setmode HAVE_SETMODE)
 check_symbol_exists(snprintf stdio.h HAVE_SNPRINTF)
 check_symbol_exists(snprintf_s stdio.h HAVE_SNPRINTF_S)

diff --git a/lib/zip_random_unix.c b/lib/zip_random_unix.c
@@ -93,12 +93,21 @@ zip_random_uint32(void) {
         return value;
     }
 
+#ifdef HAVE_RANDOM
     if (!seeded) {
         srandom((unsigned int)time(NULL));
         seeded = true;
     }
 
     return (zip_uint32_t)random();
+#else
+    if (!seeded) {
+        srand((unsigned int)time(NULL));
+        seeded = true;
+    }
+
+    return (zip_uint32_t)rand();
+#endif
 }
 #endif