1 files changed, 68 insertions, 0 deletions
diff --git a/rustables-sys/generate_bindings.sh b/rustables-sys/generate_bindings.sh
new file mode 100755
index 0000000..dc1455c
--- /dev/null
+++ b/rustables-sys/generate_bindings.sh
@@ -0,0 +1,68 @@
+#!/usr/bin/env bash
+
+# give libnftnl C library dir as first argument and output binding as second.
+# Example:
+#  $ ./generate_bindings.sh ../../libnftnl-1.0.8 src/nftnl_1_0_8.rs
+
+set -ue
+
+LIBNFTNL_PATH=$1
+BINDING_PATH=$2
+
+echo "Writing the result to $BINDING_PATH"
+
+bindgen \
+    --no-doc-comments \
+    --use-core \
+    --no-prepend-enum-name \
+    --whitelist-function '^nftnl_.+$' \
+    --whitelist-type '^nftnl_.+$' \
+    --whitelist-var '^nftnl_.+$' \
+    --whitelist-var '^NFTNL_.+$' \
+    --blacklist-type '(FILE|iovec)' \
+    --blacklist-type '^_IO_.+$' \
+    --blacklist-type '^__.+$' \
+    --blacklist-type 'nlmsghdr' \
+    --raw-line 'use libc::{c_char, c_int, c_void, iovec, nlmsghdr, FILE};' \
+    --raw-line 'use core::option::Option;' \
+    --ctypes-prefix 'libc' \
+    -o $BINDING_PATH \
+    libnftnl.h --\
+    -I$LIBNFTNL_PATH/include
+
+# Tidy up and correct things I could not manage to configure bindgen to do for me
+sed -i 's/libc::\(c_[a-z]*\)/\1/g'  $BINDING_PATH
+sed -i 's/::core::option::Option/Option/g' $BINDING_PATH
+sed -i 's/_bindgen_ty_[0-9]\+/u32/g' $BINDING_PATH
+sed -i 's/pub type u32 = u32;//g' $BINDING_PATH
+sed -i '/#\[derive(Debug, Copy, Clone)\]/d' $BINDING_PATH
+
+# Change struct bodies to (c_void);
+#   Search regex: {\n +_unused: \[u8; 0],\n}
+#   Replace string: (c_void);\n
+sed -i -e '/^pub struct .* {$/ {
+    N;N
+    s/ {\n *_unused: \[u8; 0\],\n}/(c_void);\n/
+}' "$BINDING_PATH"
+
+
+# Remove all }\nextern "C" { to condense code a bit
+#   Search regex: }\nextern "C" {
+#   Replace string: 
+sed -i -e '/^extern "C" {$/ {
+    :loop
+    n
+    /^}$/! b loop
+    /^}$/ {
+        N
+        t reset_condition_flags
+        :reset_condition_flags
+        s/}\nextern "C" {//
+        t loop
+    }
+}' "$BINDING_PATH"
+
+# Add bindgen version to comment at start of file
+sed -i "1s/bindgen/$(bindgen --version)/" $BINDING_PATH
+
+rustfmt $BINDING_PATH