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src/file_myo.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-24 21:03:28 +01:00
parent 22b1e66917
commit 651ebcea7d
1 changed files with 11 additions and 3 deletions
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14
src/file_myo.c
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@ -31,8 +31,8 @@
#include "types.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_myo(file_stat_t *file_stat);
static int header_check_myo(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 file_hint_t file_hint_myo= {
.extension="myo",
@ -43,7 +43,16 @@ const file_hint_t file_hint_myo= {
.register_header_check=&register_header_check_myo
};
/*@
@ requires buffer_size >= 4;
@ 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_myo, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_myo(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[0]+(((uint64_t)buffer[1])<<8)+(((uint64_t)buffer[2])<<16)+(((uint64_t)buffer[3])<<24)+1;
@ -63,7 +72,6 @@ static int header_check_myo(const unsigned char *buffer, const unsigned int buff
return 1;
}
static void register_header_check_myo(file_stat_t *file_stat)
{
register_header_check(0x9ce, "FC!DEF", 6, &header_check_myo, file_stat);