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src/file_fh5.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-20 15:10:11 +01:00
parent 805fc6cd99
commit 3f3ef3ea8a
1 changed files with 22 additions and 3 deletions
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25
src/file_fh5.c
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@ -40,6 +40,7 @@ struct fh5_header_s
} __attribute__ ((gcc_struct, __packed__));
typedef struct fh5_header_s fh5_header_t;
/*@ requires \valid(file_stat); */
static void register_header_check_fh5(file_stat_t *file_stat);
const file_hint_t file_hint_fh5= {
@ -51,6 +52,13 @@ const file_hint_t file_hint_fh5= {
.register_header_check=&register_header_check_fh5
};
/*@
@ requires \valid(file_recovery);
@ requires file_recovery->file_check == &file_check_fh5;
@ requires valid_file_recovery(file_recovery);
@ ensures valid_file_recovery(file_recovery);
@ assigns file_recovery->file_size;
@*/
static void file_check_fh5(file_recovery_t *file_recovery)
{
if(file_recovery->file_size < file_recovery->calculated_file_size)
@ -59,17 +67,28 @@ static void file_check_fh5(file_recovery_t *file_recovery)
file_recovery->file_size=file_recovery->calculated_file_size+4096;
}
/*@
@ requires buffer_size >= sizeof(fh5_header_t);
@ 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_fh5, 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_fh5(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 fh5_header_t *fh5_buffer=(const fh5_header_t *) buffer;
if((const uint32_t)be32(fh5_buffer->datalen) < sizeof(struct fh5_header_s))
const unsigned int datalen=be32(fh5_buffer->datalen);
if(datalen < sizeof(struct fh5_header_s))
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=4096;
file_recovery_new->calculated_file_size=be32(fh5_buffer->datalen);
file_recovery_new->calculated_file_size=datalen;
file_recovery_new->extension=file_hint_fh5.extension;
file_recovery_new->file_check=&file_check_fh5;
// log_debug("header_check_fh5: Guessed length : %u\n", fh5_file_size);
return 1;
}