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src/file_mb.c: add frama-c annotations

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Christophe Grenier 2021-02-24 17:34:31 +01:00
parent 46206cedf9
commit 1b0a138bbc
1 changed files with 26 additions and 2 deletions
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28
src/file_mb.c
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@ -32,6 +32,7 @@
#include "filegen.h" #include "filegen.h"
#include "common.h" #include "common.h"
/*@ requires \valid(file_stat); */
static void register_header_check_mb(file_stat_t *file_stat); static void register_header_check_mb(file_stat_t *file_stat);
const file_hint_t file_hint_mb= { const file_hint_t file_hint_mb= {
@ -50,20 +51,43 @@ struct maya_header
char magic2[8]; char magic2[8];
} __attribute__ ((gcc_struct, __packed__)); } __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct maya_header);
@ 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_mb, buffer+(..), file_recovery, file_recovery_new);
@ assigns *file_recovery_new;
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_mb(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_mb(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 struct maya_header *hdr=(const struct maya_header *)buffer; const struct maya_header *hdr=(const struct maya_header *)buffer;
if(memcmp(buffer,"FOR4",4)!=0 || be32(hdr->size) < 8) const unsigned int size=be32(hdr->size);
if(memcmp(buffer,"FOR4",4)!=0 || size < 8)
return 0; return 0;
reset_file_recovery(file_recovery_new); reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_mb.extension; file_recovery_new->extension=file_hint_mb.extension;
file_recovery_new->min_filesize=16; file_recovery_new->min_filesize=16;
file_recovery_new->calculated_file_size=(uint64_t)be32(hdr->size)+8; file_recovery_new->calculated_file_size=(uint64_t)size+8;
file_recovery_new->data_check=&data_check_size; file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size; file_recovery_new->file_check=&file_check_size;
return 1; return 1;
} }
/*@
@ 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_mb, buffer+(..), file_recovery, file_recovery_new);
@ assigns *file_recovery_new;
@ ensures \result == 0 || \result == 1;
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@*/
static int header_check_mp(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_mp(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,"FOR4",4)!=0) if(memcmp(buffer,"FOR4",4)!=0)