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src/file_sql.c: add Frama-C annotations

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This commit is contained in:
Christophe Grenier 2021-03-07 14:21:30 +01:00
parent 8ec2cc27f4
commit a8311c6ff8
1 changed files with 15 additions and 3 deletions
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18
src/file_sql.c
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@ -32,8 +32,8 @@
#include "filegen.h"
#include "common.h"
/*@ requires \valid(file_stat); */
static void register_header_check_sqlite(file_stat_t *file_stat);
static int header_check_sqlite(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_sqlite= {
.extension="sqlite",
@ -72,10 +72,22 @@ struct db_header
uint32_t version;
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires buffer_size >= sizeof(struct db_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_sqlite, 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_sqlite(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 db_header *hdr=(const struct db_header *)buffer;
unsigned int pagesize=be16(hdr->pagesize);
const unsigned int filesize_in_page=be32(hdr->filesize_in_page);
/* Must be a power of two between 512 and 32768 inclusive, or the value 1 representing a page size of 65536. */
if(pagesize==1)
pagesize=65536;
@ -88,9 +100,9 @@ static int header_check_sqlite(const unsigned char *buffer, const unsigned int b
file_recovery_new->extension=file_hint_sqlite.extension;
#endif
file_recovery_new->min_filesize=sizeof(struct db_header);
if(be32(hdr->filesize_in_page)!=0 && be32(hdr->file_change_counter)==be32(hdr->version_valid_for))
if(filesize_in_page!=0 && be32(hdr->file_change_counter)==be32(hdr->version_valid_for))
{
file_recovery_new->calculated_file_size=(uint64_t)be32(hdr->filesize_in_page) * pagesize;
file_recovery_new->calculated_file_size=(uint64_t)filesize_in_page * pagesize;
file_recovery_new->data_check=&data_check_size;
file_recovery_new->file_check=&file_check_size;
}