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src/file_frm.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-21 16:53:29 +01:00
parent dd52b6803f
commit 1c916942a5
1 changed files with 22 additions and 2 deletions
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24
src/file_frm.c
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@ -33,9 +33,8 @@
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_frm(file_stat_t *file_stat);
static int header_check_frm(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 void file_check_frm(file_recovery_t *file_recovery);
const file_hint_t file_hint_frm= {
.extension="frm",
@ -46,6 +45,16 @@ const file_hint_t file_hint_frm= {
.register_header_check=&register_header_check_frm
};
/*@
@ requires \valid(file_recovery);
@ requires \valid(file_recovery->handle);
@ requires valid_file_recovery(file_recovery);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ ensures \valid(file_recovery->handle);
@ ensures valid_file_recovery(file_recovery);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_frm(file_recovery_t *file_recovery)
{
const unsigned char frm_footer[11]= {
@ -54,6 +63,17 @@ static void file_check_frm(file_recovery_t *file_recovery)
file_search_footer(file_recovery, frm_footer, sizeof(frm_footer), 1);
}
/*@
@ requires buffer_size >= 18;
@ 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_frm, 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_frm(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(!isprint(buffer[14]) || !isprint(buffer[15]) || !isprint(buffer[16]) || !isprint(buffer[17]))