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src/file_tivo.c: add Frama-C annotations

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Christophe Grenier 2021-03-09 07:59:08 +01:00
parent 50b90cd0dc
commit 762efa63e2
1 changed files with 21 additions and 0 deletions
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21
src/file_tivo.c
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@ -31,6 +31,7 @@
#include "types.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_tivo(file_stat_t *file_stat);
const file_hint_t file_hint_tivo= {
@ -42,6 +43,15 @@ const file_hint_t file_hint_tivo= {
.register_header_check=&register_header_check_tivo
};
/*@
@ requires \valid(file_recovery);
@ requires valid_file_recovery(file_recovery);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires file_recovery->file_check == &file_check_tivo;
@ ensures \valid(file_recovery->handle);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_tivo(file_recovery_t *file_recovery)
{
const unsigned char tivo_footer[8]= {
@ -50,6 +60,17 @@ static void file_check_tivo(file_recovery_t *file_recovery)
file_search_footer(file_recovery, tivo_footer, sizeof(tivo_footer), 0);
}
/*@
@ requires buffer_size >= 0x1c+6;
@ 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_tivo, 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_tivo(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(memcmp(&buffer[0x1c], "<?xml ", 6)!=0)