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src/file_icc.c: add frama-c annotations

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Christophe Grenier 2021-02-22 22:10:09 +01:00
parent 73ca3bcc12
commit d524874222
1 changed files with 13 additions and 0 deletions
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13
src/file_icc.c
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@ -30,6 +30,7 @@
#include "types.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_icc(file_stat_t *file_stat);
const file_hint_t file_hint_icc= {
@ -41,6 +42,17 @@ const file_hint_t file_hint_icc= {
.register_header_check=&register_header_check_icc
};
/*@
@ requires buffer_size >= 128;
@ 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_icc, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_icc(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 file_size=(((uint64_t)buffer[0])<<24) +
@ -48,6 +60,7 @@ static int header_check_icc(const unsigned char *buffer, const unsigned int buff
unsigned int i;
if(file_size<128 || buffer[10]!=0 || buffer[11]!=0)
return 0;
/*@ loop assigns i; */
for(i=100; i<128; i++)
if(buffer[i]!=0)
return 0;