src/file_psf.c: add Frama-C annotations

1 files changed, 13 insertions, 1 deletions

diff --git a/src/file_psf.c b/src/file_psf.c
index 28c817dd..acb4f7c1 100644
--- a/src/file_psf.c
+++ b/src/file_psf.c
@@ -31,6 +31,7 @@
 #include "types.h"
 #include "filegen.h"
 
+/*@ requires \valid(file_stat); */
 static void register_header_check_psf(file_stat_t *file_stat);
 
 const file_hint_t file_hint_psf= {
@@ -42,8 +43,19 @@ const file_hint_t file_hint_psf= {
   .register_header_check=&register_header_check_psf
 };
 
+/*@
+  @ requires buffer_size >= 32;
+  @ requires \valid_read(buffer+(0..buffer_size-1));
+  @ requires valid_file_recovery(file_recovery);
+  @ requires \valid(file_recovery_new);
+  @ requires file_recovery_new->blocksize > 0;
+  @ requires separation: \separated(&file_hint_psf, buffer+(..), file_recovery, file_recovery_new);
+  @ ensures \result == 0 || \result == 1;
+  @ ensures  \result!=0 ==> valid_file_recovery(file_recovery_new);
+  @*/
 static int header_check_psf(const unsigned char *buffer, const unsigned int buffer_size, const unsigned int safe_header_only, const file_recovery_t *file_recovery, file_recovery_t *file_recovery_new)
 {
+  const uint64_t size=((uint64_t)buffer[28]<<24)+((uint64_t)buffer[29]<<16)+((uint64_t)buffer[30]<<8)+((uint64_t)buffer[31]<<0)+272;
   if(file_recovery->file_stat!=NULL &&
       file_recovery->file_stat->file_hint==&file_hint_psf)
   {
@@ -52,7 +64,7 @@ static int header_check_psf(const unsigned char *buffer, const unsigned int buff
   }
   reset_file_recovery(file_recovery_new);
   file_recovery_new->extension=file_hint_psf.extension;
-  file_recovery_new->calculated_file_size=((uint64_t)buffer[28]<<24)+((uint64_t)buffer[29]<<16)+((uint64_t)buffer[30]<<8)+((uint64_t)buffer[31]<<0) + 272;
+  file_recovery_new->calculated_file_size=size;
   file_recovery_new->data_check=&data_check_size;
   file_recovery_new->file_check=&file_check_size;
   return 1;