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src/file_bpg.c: improve Frama-C annotations

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This commit is contained in:
Christophe Grenier 2021-06-06 15:01:31 +02:00
parent f4a95b0f45
commit 053fc5b5f9
1 changed files with 3 additions and 18 deletions
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21
src/file_bpg.c
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@ -37,7 +37,7 @@
#define MAX_BPG_SIZE 0x800000 #define MAX_BPG_SIZE 0x800000
/*@ requires \valid(file_stat); */ /*@ requires valid_register_header_check(file_stat); */
static void register_header_check_bpg(file_stat_t *file_stat); static void register_header_check_bpg(file_stat_t *file_stat);
const file_hint_t file_hint_bpg= { const file_hint_t file_hint_bpg= {
@ -82,30 +82,15 @@ static unsigned int getue32(const unsigned char *buffer, const unsigned int buff
} }
/*@ /*@
@ requires buffer_size > 0;
@ requires \valid_read(buffer+(0..buffer_size-1));
@ requires \valid_read(file_recovery);
@ requires file_recovery->file_stat==\null || valid_read_string((char*)file_recovery->filename);
@ requires \valid(file_recovery_new);
@ requires file_recovery_new->blocksize > 0;
@
@ requires buffer_size >= 6+3*5; @ requires buffer_size >= 6+3*5;
@ requires separation: \separated(&file_hint_bpg, buffer+(..), file_recovery, file_recovery_new); @ requires separation: \separated(&file_hint_bpg, buffer+(..), file_recovery, file_recovery_new);
@ @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1; @ ensures valid_header_check_result(\result, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->time);
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->calculated_file_size);
@ ensures (\result == 1) ==> file_recovery_new->file_size == 0; @ ensures (\result == 1) ==> file_recovery_new->file_size == 0;
@ ensures (\result == 1) ==> \initialized(&file_recovery_new->min_filesize);
@ ensures (\result != 0) ==> file_recovery_new->extension != \null;
@
@ ensures (\result == 1) ==> (file_recovery_new->time == 0); @ ensures (\result == 1) ==> (file_recovery_new->time == 0);
@ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_bpg.extension); @ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_bpg.extension);
@ ensures (\result == 1) ==> (file_recovery_new->data_check== &data_check_size); @ ensures (\result == 1) ==> (file_recovery_new->data_check== &data_check_size);
@ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_size); @ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_size);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new; @ assigns *file_recovery_new;
@*/ @*/
static int header_check_bpg(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_bpg(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)