From c08be0cebcb66668b2b4757ae695f10c01a76a99 Mon Sep 17 00:00:00 2001
From: William Casarin <jb55@jb55.com>
Date: Sun, 11 Feb 2024 11:03:12 -0800
Subject: [PATCH] fix build on macos and iOS

Signed-off-by: William Casarin <jb55@jb55.com>
---
 Makefile      | 12 ++++++++++--
 src/nostrdb.c |  8 +++++---
 src/random.h  | 10 ++++++----
 3 files changed, 21 insertions(+), 9 deletions(-)

diff --git a/Makefile b/Makefile
index 35de0f6..ddc5922 100644
--- a/Makefile
+++ b/Makefile
@@ -18,6 +18,14 @@ C_BINDINGS_COMMON=$(BINDINGS)/c/flatbuffers_common_builder.h $(BINDINGS)/c/flatb
 C_BINDINGS=$(C_BINDINGS_COMMON) $(C_BINDINGS_PROFILE) $(C_BINDINGS_META)
 BIN=ndb
 
+# Detect operating system
+UNAME_S := $(shell uname -s)
+
+# macOS-specific flags
+ifeq ($(UNAME_S),Darwin)
+    LDFLAGS += -framework Security
+endif
+
 CHECKDATA=testdata/db/v0/data.mdb
 
 all: $(BIN) lib bench
@@ -31,7 +39,7 @@ libnostrdb.a: $(OBJS)
 lib: libnostrdb.a
 
 ndb: ndb.c $(DEPS)
-	$(CC) $(CFLAGS) ndb.c $(LDS) -o $@
+	$(CC) $(CFLAGS) ndb.c $(LDS) $(LDFLAGS) -o $@
 
 bindings: bindings-swift bindings-rust bindings-c
 
@@ -179,6 +187,6 @@ testdata/db/.dir:
 	touch testdata/db/.dir
 
 test: test.c $(DEPS) testdata/db/.dir
-	$(CC) $(CFLAGS) test.c $(LDS) -o $@
+	$(CC) $(CFLAGS) test.c $(LDS) $(LDFLAGS) -o $@
 
 .PHONY: tags clean fake
diff --git a/src/nostrdb.c b/src/nostrdb.c
index dc31136..74c6063 100644
--- a/src/nostrdb.c
+++ b/src/nostrdb.c
@@ -2612,7 +2612,7 @@ static int ndb_query_plan_execute_ids(struct ndb_txn *txn,
 	struct ndb_query_result res;
 	struct ndb_tsid tsid, *ptsid;
 	uint64_t note_id, until, *pint;
-	uint64_t note_size;
+	size_t note_size;
 	unsigned char *id;
 
 	matched = 0;
@@ -2717,7 +2717,8 @@ static int ndb_query_plan_execute_tags(struct ndb_txn *txn,
 	MDB_dbi db;
 	MDB_val k, v;
 	int len, taglen, rc, i;
-	uint64_t *pint, until, note_id, note_size;
+	uint64_t *pint, until, note_id;
+	size_t note_size;
 	unsigned char key_buffer[255];
 	struct ndb_note *note;
 	struct ndb_filter_elements *tags;
@@ -2800,7 +2801,8 @@ static int ndb_query_plan_execute_kinds(struct ndb_txn *txn,
 	struct ndb_u64_tsid tsid, *ptsid;
 	struct ndb_filter_elements *kinds;
 	struct ndb_query_result res;
-	uint64_t kind, note_id, note_size, until, *pint;
+	uint64_t kind, note_id, until, *pint;
+	size_t note_size;
 	int i, rc;
 
 	// we should have kinds in a kinds filter!
diff --git a/src/random.h b/src/random.h
index 14e2533..736ed88 100644
--- a/src/random.h
+++ b/src/random.h
@@ -24,10 +24,12 @@
 #include <fcntl.h>
 #include <unistd.h>
 #include <errno.h>
-#elif defined(__linux__) || defined(__APPLE__) || defined(__FreeBSD__)
+#elif defined(__linux__) || defined(__FreeBSD__)
 #include <sys/random.h>
 #elif defined(__OpenBSD__)
 #include <unistd.h>
+#elif defined(__APPLE__)
+#include <Security/SecRandom.h>
 #else
 #error "Couldn't identify the OS"
 #endif
@@ -66,7 +68,7 @@ static int fill_random(unsigned char* data, size_t size) {
     }
     close(fd);
     return 1;
-#elif defined(__linux__) || defined(__FreeBSD__)
+#elif defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__)
     /* If `getrandom(2)` is not available you should fallback to /dev/urandom */
     ssize_t res = getrandom(data, size, 0);
     if (res < 0 || (size_t)res != size ) {
@@ -74,10 +76,10 @@ static int fill_random(unsigned char* data, size_t size) {
     } else {
         return 1;
     }
-#elif defined(__APPLE__) || defined(__OpenBSD__)
+#elif defined(__APPLE__) 
     /* If `getentropy(2)` is not available you should fallback to either
      * `SecRandomCopyBytes` or /dev/urandom */
-    int res = getentropy(data, size);
+    int res = SecRandomCopyBytes(kSecRandomDefault, size, data);
     if (res == 0) {
         return 1;
     } else {