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src/file_swf.c: improve Frama-C annotations

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Christophe Grenier 2021-07-24 17:54:11 +02:00
parent 761130d94a
commit 8422034f53
1 changed files with 8 additions and 35 deletions
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43
src/file_swf.c
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@ -44,7 +44,7 @@
#endif #endif
static const char *extension_swc="swc"; static const char *extension_swc="swc";
/*@ requires \valid(file_stat); */ /*@ requires valid_register_header_check(file_stat); */
static void register_header_check_swf(file_stat_t *file_stat); static void register_header_check_swf(file_stat_t *file_stat);
const file_hint_t file_hint_swf= { const file_hint_t file_hint_swf= {
@ -117,22 +117,13 @@ static int read_SB(const unsigned char **data, unsigned int *offset_bit, unsigne
/*@ /*@
@ requires buffer_size >= 512; @ requires buffer_size >= 512;
@ 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 separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new); @ requires separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1; @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null); @ ensures valid_header_check_result(\result, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ 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_max); @ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_size_max);
@ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null); @ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null);
@ ensures (\result == 1) ==> (file_recovery_new->extension == extension_swc); @ ensures (\result == 1) ==> (file_recovery_new->extension == extension_swc);
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ ensures (\result == 1) ==> \separated(file_recovery_new, file_recovery_new->extension);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new; @ assigns *file_recovery_new;
@*/ @*/
static int header_check_swfc(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_swfc(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)
@ -209,22 +200,13 @@ static int header_check_swfc(const unsigned char *buffer, const unsigned int buf
/*@ /*@
@ requires buffer_size >= sizeof(struct swf_header); @ requires buffer_size >= sizeof(struct swf_header);
@ 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 separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new); @ requires separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1; @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null); @ ensures valid_header_check_result(\result, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ 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 == 1) ==> (file_recovery_new->file_rename == \null); @ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null);
@ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_swf.extension); @ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_swf.extension);
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ ensures (\result == 1) ==> \separated(file_recovery_new, file_recovery_new->extension);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new; @ assigns *file_recovery_new;
@*/ @*/
static int header_check_swf(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_swf(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)
@ -262,22 +244,13 @@ static int header_check_swf(const unsigned char *buffer, const unsigned int buff
/*@ /*@
@ requires buffer_size >= sizeof(struct swfz_header); @ requires buffer_size >= sizeof(struct swfz_header);
@ 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 separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new); @ requires separation: \separated(&file_hint_swf, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result == 0 || \result == 1; @ requires valid_header_check_param(buffer, buffer_size, safe_header_only, file_recovery, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->file_stat == \null); @ ensures valid_header_check_result(\result, file_recovery_new);
@ ensures (\result == 1) ==> (file_recovery_new->handle == \null);
@ 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_max); @ ensures (\result == 1) ==> (file_recovery_new->file_check == &file_check_size_max);
@ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null); @ ensures (\result == 1) ==> (file_recovery_new->file_rename == \null);
@ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_swf.extension); @ ensures (\result == 1) ==> (file_recovery_new->extension == file_hint_swf.extension);
@ ensures (\result == 1) ==> (valid_read_string(file_recovery_new->extension));
@ ensures (\result == 1) ==> \separated(file_recovery_new, file_recovery_new->extension);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new; @ assigns *file_recovery_new;
@*/ @*/
static int header_check_swfz(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_swfz(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)
@ -297,7 +270,7 @@ static int header_check_swfz(const unsigned char *buffer, const unsigned int buf
} }
/*@ /*@
@ requires \valid(file_stat); @ requires valid_register_header_check(file_stat);
@*/ @*/
static void register_header_check_swf(file_stat_t *file_stat) static void register_header_check_swf(file_stat_t *file_stat)
{ {