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src/file_v2i.c: add Frama-C annotations

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Christophe Grenier 2021-03-13 16:16:11 +01:00
parent 7930243d66
commit ff57179749
1 changed files with 21 additions and 10 deletions
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31
src/file_v2i.c
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@ -31,24 +31,35 @@
#include "types.h" #include "types.h"
#include "filegen.h" #include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_v2i(file_stat_t *file_stat); static void register_header_check_v2i(file_stat_t *file_stat);
const file_hint_t file_hint_v2i= { const file_hint_t file_hint_v2i = {
.extension="v2i", .extension = "v2i",
.description="v2i backup", .description = "v2i backup",
.max_filesize=PHOTOREC_MAX_FILE_SIZE, .max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover=1, .recover = 1,
.enable_by_default=1, .enable_by_default = 1,
.register_header_check=&register_header_check_v2i .register_header_check = &register_header_check_v2i
}; };
/*@
@ requires buffer_size >= 0x18 ;
@ 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_v2i, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_v2i(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_v2i(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 unsigned char v2i_sign[4]={0x13, 0x04, 0x08, 0x00}; const unsigned char v2i_sign[4] = { 0x13, 0x04, 0x08, 0x00 };
if(memcmp(&buffer[0x14], v2i_sign, sizeof(v2i_sign))==0) if(memcmp(&buffer[0x14], v2i_sign, sizeof(v2i_sign)) == 0)
{ {
reset_file_recovery(file_recovery_new); reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_v2i.extension; file_recovery_new->extension = file_hint_v2i.extension;
return 1; return 1;
} }
return 0; return 0;