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src/file_wee.c: add Frama-C annotations

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Christophe Grenier 2021-03-13 20:15:13 +01:00
parent b953384fff
commit 5909fc97d0
1 changed files with 34 additions and 14 deletions
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48
src/file_wee.c
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@ -31,39 +31,59 @@
#include "types.h"
#include "filegen.h"
/*@ requires \valid(file_stat); */
static void register_header_check_wee(file_stat_t *file_stat);
const file_hint_t file_hint_wee= {
.extension="wee",
.description="weecast",
.max_filesize=PHOTOREC_MAX_FILE_SIZE,
.recover=1,
.enable_by_default=1,
.register_header_check=&register_header_check_wee
const file_hint_t file_hint_wee = {
.extension = "wee",
.description = "weecast",
.max_filesize = PHOTOREC_MAX_FILE_SIZE,
.recover = 1,
.enable_by_default = 1,
.register_header_check = &register_header_check_wee
};
/*@
@ requires \valid(file_recovery);
@ requires valid_file_recovery(file_recovery);
@ requires \separated(file_recovery, file_recovery->handle, file_recovery->extension, &errno, &Frama_C_entropy_source);
@ requires file_recovery->file_check == &file_check_wee;
@ ensures \valid(file_recovery->handle);
@ assigns *file_recovery->handle, errno, file_recovery->file_size;
@ assigns Frama_C_entropy_source;
@*/
static void file_check_wee(file_recovery_t *file_recovery)
{
const unsigned char wee_footer[7]= {
'W' , 'E' , 'E' , 'X' , 0x21, 0x01, 0x00
const unsigned char wee_footer[7] = {
'W', 'E', 'E', 'X', 0x21, 0x01, 0x00
};
file_search_footer(file_recovery, wee_footer, sizeof(wee_footer), 17);
}
/*@
@ requires buffer_size >= 0x1b + 0xa;
@ 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_wee, buffer+(..), file_recovery, file_recovery_new);
@ ensures \result!=0 ==> valid_file_recovery(file_recovery_new);
@ assigns *file_recovery_new;
@*/
static int header_check_wee(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)
{
if(buffer[0x1a]!=0xa || memcmp(&buffer[0x1b], "onMetaData", 0x0a)!=0)
if(buffer[0x1a] != 0xa || memcmp(&buffer[0x1b], "onMetaData", 0x0a) != 0)
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->extension=file_hint_wee.extension;
file_recovery_new->file_check=&file_check_wee;
file_recovery_new->extension = file_hint_wee.extension;
file_recovery_new->file_check = &file_check_wee;
return 1;
}
static void register_header_check_wee(file_stat_t *file_stat)
{
static const unsigned char wee_header[7]= {
'W' , 'E' , 'E' , 'X' , 0x21, 0x01, 0x00
static const unsigned char wee_header[7] = {
'W', 'E', 'E', 'X', 0x21, 0x01, 0x00
};
register_header_check(0, wee_header, sizeof(wee_header), &header_check_wee, file_stat);
}