ffi: Move the examples.

  - Move the 'example.c' to sequoia-ffi.

  - Fix and improve Makefile.

2 files changed, 62 insertions, 0 deletions

diff --git a/ffi/examples/Makefile b/ffi/examples/Makefile
new file mode 100644
index 00000000..4f71c405
--- /dev/null
+++ b/ffi/examples/Makefile
@@ -0,0 +1,12 @@
+# Makefile for examples written in C.
+
+TARGETS = example dump keyserver
+CFLAGS  = -I../src -O0 -g -Wall
+LDFLAGS = -L../../target/debug -lsequoia_ffi
+
+all: $(TARGETS)
+
+clean:
+	rm -f $(TARGETS)
+
+$(TARGETS): ../src/sequoia.h
diff --git a/ffi/examples/example.c b/ffi/examples/example.c
new file mode 100644
index 00000000..5b087c15
--- /dev/null
+++ b/ffi/examples/example.c
@@ -0,0 +1,50 @@
+#define _GNU_SOURCE
+#include <error.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include <sequoia.h>
+
+int
+main (int argc, char **argv)
+{
+  struct stat st;
+  int fd;
+  char *b;
+  struct sq_context *ctx;
+  struct sq_tpk *tpk;
+
+  if (argc != 2)
+    error (1, 0, "Usage: %s <file>", argv[0]);
+
+  ctx = sq_context_new("org.sequoia-pgp.example");
+  if (ctx == NULL)
+    error (1, 0, "Initializing sequoia failed.");
+
+  if (stat (argv[1], &st))
+    error (1, errno, "%s", argv[1]);
+
+  fd = open (argv[1], O_RDONLY);
+  if (fd == -1)
+    error (1, errno, "%s", argv[1]);
+
+  b = mmap (NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0);
+  if (b == MAP_FAILED)
+    error (1, errno, "mmap");
+
+  tpk = sq_tpk_from_bytes (b, st.st_size);
+  if (tpk == NULL)
+    error (1, 0, "sq_tpk_from_bytes failed");
+
+  sq_tpk_dump (tpk);
+  sq_tpk_free (tpk);
+  sq_context_free (ctx);
+  munmap (b, st.st_size);
+  close (fd);
+  return 0;
+}