luisgulo/testdisk
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

src/file_bvr.c: add missing frama-c annotations

Browse source
This commit is contained in:
Christophe Grenier 2021-02-06 16:50:03 +01:00
parent 63d53f1a35
commit 0bcffdf162
1 changed files with 24 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

26
src/file_bvr.c
View file

@ -31,6 +31,7 @@
#include "types.h" #include "types.h"
#include "filegen.h" #include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_bvr(file_stat_t *file_stat); static void register_header_check_bvr(file_stat_t *file_stat);
const file_hint_t file_hint_bvr= { const file_hint_t file_hint_bvr= {
@ -42,6 +43,17 @@ const file_hint_t file_hint_bvr= {
.register_header_check=&register_header_check_bvr .register_header_check=&register_header_check_bvr
}; };
/*@
@ requires buffer_size > 0;
@ requires (buffer_size&1)==0;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires \valid(file_recovery);
@ requires file_recovery->data_check==&data_check_bvr;
@ requires file_recovery->calculated_file_size <= PHOTOREC_MAX_FILE_SIZE;
@ requires \separated(buffer, file_recovery);
@ ensures \result == DC_CONTINUE || \result == DC_STOP;
@ assigns file_recovery->calculated_file_size;
@*/
static data_check_t data_check_bvr(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery) static data_check_t data_check_bvr(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{ {
/*@ /*@
@ -50,17 +62,27 @@ static data_check_t data_check_bvr(const unsigned char *buffer, const unsigned i
while(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size && while(file_recovery->calculated_file_size + buffer_size/2 >= file_recovery->file_size &&
file_recovery->calculated_file_size + 16 < file_recovery->file_size + buffer_size/2) file_recovery->calculated_file_size + 16 < file_recovery->file_size + buffer_size/2)
{ {
const unsigned int i=file_recovery->calculated_file_size - file_recovery->file_size + buffer_size/2; const unsigned int i=file_recovery->calculated_file_size + buffer_size/2 - file_recovery->file_size;
/*@ assert 0 <= i < buffer_size - 16; */
const uint32_t *valp=(const uint32_t *)&buffer[i+12]; const uint32_t *valp=(const uint32_t *)&buffer[i+12];
if(memcmp(&buffer[i], "BLUE", 4) != 0) if(memcmp(&buffer[i], "BLUE", 4) != 0)
return DC_STOP; return DC_STOP;
file_recovery->calculated_file_size+=0x20 + *valp; file_recovery->calculated_file_size+=(uint64_t)0x20 + *valp;
if(*valp == 0) if(*valp == 0)
return DC_STOP; return DC_STOP;
} }
return DC_CONTINUE; return DC_CONTINUE;
} }
/*@
@ requires buffer_size > 0;
@ 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_bvr, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_bvr(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) static int header_check_bvr(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)
{ {
if(file_recovery->file_stat!=NULL && if(file_recovery->file_stat!=NULL &&