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src/file_mrw.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-24 20:53:42 +01:00
parent d572f9d708
commit bf8664ce7e
1 changed files with 16 additions and 2 deletions
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18
src/file_mrw.c
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@ -33,6 +33,7 @@
#include "filegen.h"
#include "log.h"
/*@ requires \valid(file_stat); */
static void register_header_check_mrw(file_stat_t *file_stat);
const file_hint_t file_hint_mrw= {
@ -47,7 +48,9 @@ const file_hint_t file_hint_mrw= {
struct hdr {
uint32_t fourcc;
uint32_t size;
#if 0
char data[0];
#endif
} __attribute__ ((gcc_struct, __packed__));
struct prd {
@ -69,13 +72,24 @@ struct prd {
} __attribute__ ((gcc_struct, __packed__));
/* Minolta */
/*@
@ requires buffer_size >= 2*sizeof(struct hdr) + sizeof(struct prd);
@ 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_mrw, 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_mrw(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 prd_header[4]= { 0x00,'P','R','D'};
const struct hdr *mrmhdr = (const struct hdr*)buffer;
const struct hdr *prdhdr = (const struct hdr*)&mrmhdr->data;
const struct hdr *prdhdr = (const struct hdr*)&buffer[sizeof(struct hdr)];
/* Picture Raw Dimensions */
const struct prd *prd = (const struct prd*)&prdhdr->data;
const struct prd *prd = (const struct prd*)&buffer[2*sizeof(struct hdr)];
if(memcmp(&prdhdr->fourcc, prd_header, sizeof(prd_header))!=0)
return 0;
reset_file_recovery(file_recovery_new);