From f21dcde54b09913550036e6501cca935278597d9 Mon Sep 17 00:00:00 2001
From: Tom Smeding <tom@tomsmeding.com>
Date: Sun, 29 Mar 2026 23:25:10 +0200
Subject: Initial

---
 cbits/mmap.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)
 create mode 100644 cbits/mmap.c

(limited to 'cbits')

diff --git a/cbits/mmap.c b/cbits/mmap.c
new file mode 100644
index 0000000..079959f
--- /dev/null
+++ b/cbits/mmap.c
@@ -0,0 +1,26 @@
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+
+
+void* ircbrowse_mmap(int fd, size_t *lengthp) {
+  struct stat statbuf;
+  int ret = fstat(fd, &statbuf);
+  if (ret < 0) {
+    perror("stat");
+    return NULL;
+  }
+  void *addr = mmap(NULL, statbuf.st_size, PROT_READ, MAP_SHARED, fd, 0);
+  if (addr == NULL) {
+    perror("mmap");
+  }
+  if (lengthp != NULL) *lengthp = statbuf.st_size;
+  return addr;
+}
+
+void ircbrowse_munmap(void *addr, size_t length) {
+  int ret = munmap(addr, length);
+  if (ret < 0) {
+    perror("munmap");
+  }
+}
-- 
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