From 60d1b0c720c58dc08b070dd9d39d72f93a07b028 Mon Sep 17 00:00:00 2001
From: la-ninpre <leobrekalini@gmail.com>
Date: Fri, 10 Sep 2021 14:06:29 +0000
Subject: added support for arc4random_uniform function

i know that it's probably an overkill for such stupid little program, but
why not :D

also refactored strlcat support a bit, to make sure that strncat function is
used if strlcat could not be found.

FossilOrigin-Name: 1b72489c7f0f5b72bac65f1469c9bec650d7ffdabfa4f88409e15c630ac5a52d
---
 nimisewi.c | 63 +++++++++++++++++++++++++++++++++++++++-----------------------
 1 file changed, 40 insertions(+), 23 deletions(-)

(limited to 'nimisewi.c')

diff --git a/nimisewi.c b/nimisewi.c
index bb42d2c..989e227 100644
--- a/nimisewi.c
+++ b/nimisewi.c
@@ -29,17 +29,22 @@
 #include <config.h>
 #include <err.h>
 #include <stdio.h>
-#include <stdlib.h>
 #include <unistd.h>
+#include <stdint.h>
+#include <sys/types.h>
+#include <sys/time.h>
 
-#ifdef HAVE_BSD_STRING_H
-#include <bsd/string.h>
+#ifdef HAVE_BSD_STDLIB_H
+    #include <bsd/stdlib.h>
 #else
-#include <string.h>
+    #include <stdlib.h>
 #endif
 
-#include <sys/types.h>
-#include <sys/time.h>
+#ifdef HAVE_BSD_STRING_H
+    #include <bsd/string.h>
+#else
+    #include <string.h>
+#endif
 
 #include "nimisewi.h"
 #include "nimitoki.h" /* nimi_toki, suli_pi_nimi_toki */
@@ -53,6 +58,27 @@ struct nanpa_nimi {
     size_t suli_pi_nimi_sewi; /* length of generated phrase */
 };
 
+static uint32_t
+nsrand(uint32_t limit)
+{
+#ifdef HAVE_ARC4RANDOM_UNIFORM
+    return arc4random_uniform(limit);
+#else
+    return rand() % limit;
+#endif
+}
+
+static size_t
+catstr(char *dst, const char *src, size_t size)
+{
+#ifdef HAVE_STRLCAT
+    return strlcat(dst, src, size);
+#else
+    strncat(dst, src, size);
+    return strlen(dst);
+#endif
+}
+
 static void
 open_e_nanpa_sewi(void)
 {
@@ -109,7 +135,7 @@ nanpa_nimi_pana_e_pi(struct nanpa_nimi *nn)
          * - word1 word2 word3
          * - word1 pi word2 word3
          */
-        nn->pi_li_lon = rand() % 2;
+        nn->pi_li_lon = nsrand(2);
     } else if (nn->nanpa_nimi > 2) {
         nn->pi_li_lon = 1;
     }
@@ -142,7 +168,7 @@ static struct nanpa_nimi
     nn->nanpa_sewi_nimi = NULL;
     nn->suli_pi_nimi_sewi = 0;
 
-    nn->nanpa_nimi = (rand() % 6);
+    nn->nanpa_nimi = (nsrand(6));
 
     /* to use with arbitrary wordlist, remove following function call */
     nanpa_nimi_pana_e_pi(nn);
@@ -153,7 +179,7 @@ static struct nanpa_nimi
         return NULL;
     }
     for (i = 0; i <= nn->nanpa_nimi; i++) {
-        nn->nanpa_sewi_nimi[i] = rand() % suli_pi_nimi_toki;
+        nn->nanpa_sewi_nimi[i] = nsrand(suli_pi_nimi_toki);
     }
     if (nn->pi_li_lon) {
         nn->nanpa_sewi_nimi[nn->nanpa_pi] = -1;
@@ -183,7 +209,9 @@ char
     char *nimi_pana;
     struct nanpa_nimi *nn;
 
+#ifndef HAVE_ARC4RANDOM_UNIFORM
     open_e_nanpa_sewi();
+#endif
 
     nn = pana_e_nanpa_nimi();
 
@@ -194,25 +222,14 @@ char
     }
 
     for (i = 0; i < nn->nanpa_nimi; i++) {
-#ifdef HAVE_STRLCAT
-        strlcat(nimi_pana,
+        catstr(nimi_pana,
                 pana_e_nimi(nn->nanpa_sewi_nimi[i]),
                 nn->suli_pi_nimi_sewi);
-        strlcat(nimi_pana, " ", nn->suli_pi_nimi_sewi);
-#else
-        strcat(nimi_pana,
-               pana_e_nimi(nn->nanpa_sewi_nimi[i]));
-        strcat(nimi_pana, " ");
-#endif
+        catstr(nimi_pana, " ", nn->suli_pi_nimi_sewi);
     }
-#ifdef HAVE_STRLCAT
-    strlcat(nimi_pana,
+    catstr(nimi_pana,
             pana_e_nimi(nn->nanpa_sewi_nimi[i]),
             nn->suli_pi_nimi_sewi);
-#else
-    strcat(nimi_pana,
-           pana_e_nimi(nn->nanpa_sewi_nimi[i]));
-#endif
 
     weka_e_nanpa_nimi(nn);
 
-- 
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