1 files changed, 46 insertions, 0 deletions
diff --git a/src/serverlib/s6rc_db_read_sizes.c b/src/serverlib/s6rc_db_read_sizes.c
new file mode 100644
index 0000000..433af2e
--- /dev/null
+++ b/src/serverlib/s6rc_db_read_sizes.c
@@ -0,0 +1,46 @@
+/* ISC license. */
+
+#include <sys/types.h>
+#include <stdint.h>
+#include <skalibs/buffer.h>
+#include <skalibs/djbunix.h>
+#include <skalibs/unix-transactional.h>
+#include <s6-rc/s6rc-db.h>
+
+static inline int s6rc_db_read_sizes_buffer (buffer *b, s6rc_db_t *db)
+{
+  uint32_t x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->nshort = x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->nlong = x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->stringlen = x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->nargvs = x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->ndeps = x ;
+  if (!s6rc_db_read_uint32(b, &x)) return 0 ;
+  db->nproducers = x ;
+  return 1 ;
+}
+
+int s6rc_db_read_sizes (int fdcompiled, s6rc_db_t *db)
+{
+  char buf[24] ;
+  buffer b ;
+  int fd = open_readatb(fdcompiled, "n") ;
+  if (fd < 0) return 0 ;
+  buffer_init(&b, &buffer_read, fd, buf, 24) ;
+  if (!s6rc_db_read_sizes_buffer(&b, db))
+  {
+    fd_close(fd) ;
+    return 0 ;
+  }
+  {
+    char c ;
+    ssize_t r = buffer_get(&b, &c, 1) ;
+    fd_close(fd) ;
+    return !r ;
+  }
+}