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src/file_cwk.c: add frama-c annotations

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This commit is contained in:
Christophe Grenier 2021-02-14 17:26:25 +01:00
parent cce016762e
commit 77816b359d
1 changed files with 24 additions and 2 deletions
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26
src/file_cwk.c
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@ -32,9 +32,8 @@
#include "filegen.h"
#include "common.h"
/*@ requires \valid(file_stat); */
static void register_header_check_cwk(file_stat_t *file_stat);
static int header_check_cwk(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 void file_check_cwk(file_recovery_t *file_recovery);
const file_hint_t file_hint_cwk= {
.extension="cwk",
@ -65,12 +64,35 @@ struct cwk_header
uint16_t inner_width;
} __attribute__ ((gcc_struct, __packed__));
/*@
@ requires valid_file_recovery(file_recovery);
@ requires \valid(file_recovery->handle);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires \initialized(&file_recovery->time);
@
@ requires file_recovery->file_check == &file_check_cwk;
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@
@ ensures \valid(file_recovery->handle);
@*/
static void file_check_cwk(file_recovery_t *file_recovery)
{
const unsigned char cwk_footer[4]= {0xf0, 0xf1, 0xf2, 0xf3};
file_search_footer(file_recovery, cwk_footer, sizeof(cwk_footer), 4);
}
/*@
@ requires buffer_size >= sizeof(struct cwk_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_cwk, 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_cwk(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 cwk_header *cwk=(const struct cwk_header *)buffer;