luisgulo/testdisk
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

PhotoRec: fix for zip recovery on 64-bits plateform

Browse source
This commit is contained in:
Christophe Grenier 2008-04-07 09:04:36 +02:00
parent 7c1bc8c7c8
commit 00a58a7f13
1 changed files with 24 additions and 24 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

48
src/file_zip.c
View file

@ -69,17 +69,17 @@ static const unsigned char zip_header2[8] = { 'P', 'K', '0', '0', 'P', 'K', 0x0
struct zip_file_entry {
uint16_t version; /** Version needed to extract */
unsigned is_encrypted:1; /** File is encrypted? */
unsigned compression_info:2; /** Info about compression method used */
unsigned has_descriptor:1; /** Compressed data followed by descriptor? */
unsigned enhanced_deflate:1; /** Reserved for use with method 8 */
unsigned is_patched:1; /** File is compressed with patched data? */
unsigned strong_encrypt:1; /** Strong encryption (version >= 50) */
unsigned unused2:4; /** Unused */
unsigned uses_unicode:1; /** Filename and comments are in UTF-8 */
unsigned unused3:1; /** Reserved by PKWARE for enhanced compression. */
unsigned encrypted_central_dir:1; /** Selected data values in the Local Header are masked */
unsigned unused1:2; /** Unused */
uint16_t is_encrypted:1; /** File is encrypted? */
uint16_t compression_info:2; /** Info about compression method used */
uint16_t has_descriptor:1; /** Compressed data followed by descriptor? */
uint16_t enhanced_deflate:1; /** Reserved for use with method 8 */
uint16_t is_patched:1; /** File is compressed with patched data? */
uint16_t strong_encrypt:1; /** Strong encryption (version >= 50) */
uint16_t unused2:4; /** Unused */
uint16_t uses_unicode:1; /** Filename and comments are in UTF-8 */
uint16_t unused3:1; /** Reserved by PKWARE for enhanced compression. */
uint16_t encrypted_central_dir:1; /** Selected data values in the Local Header are masked */
uint16_t unused1:2; /** Unused */
uint16_t compression; /** Compression method */
uint32_t last_mod; /** Last moditication file time */
@ -93,27 +93,27 @@ typedef struct zip_file_entry zip_file_entry_t;
static uint32_t expected_compressed_size=0;
static int64_t file_get_pos(FILE *f, const void* needle, unsigned int size)
static int64_t file_get_pos(FILE *f, const void* needle, const unsigned int size)
{
char *buffer = MALLOC(4096+size);
char *buffer = MALLOC(4096);
int64_t total = 0;
#ifdef DEBUG_ZIP
log_trace("zip: file_get_pos()\n");
log_trace("zip: file_get_pos(f, needle, %u)\n", size);
#endif
while (!feof(f))
{
int count = 0;
unsigned left;
unsigned read_size= fread(buffer, 1, 4096, f);
unsigned int left;
unsigned int read_size= fread(buffer, 1, 4096, f);
left = read_size;
while (left>size)
while (left>=size)
{
if (memcmp(buffer+count, needle, size)==0)
{
free(buffer);
if(fseek(f, count-read_size, SEEK_CUR)<0)
if(fseek(f, (long)count-read_size, SEEK_CUR)<0)
return -1;
return total;
}
@ -121,7 +121,7 @@ static int64_t file_get_pos(FILE *f, const void* needle, unsigned int size)
total++;
left--;
}
if(feof(f) || fseek(f, -size, SEEK_CUR)<0)
if(feof(f) || fseek(f, (long)1-size, SEEK_CUR)<0)
{
free(buffer);
return -1;
@ -209,10 +209,10 @@ static int zip_parse_file_entry(file_recovery_t *fr)
compressed data.
Typically used in OOO documents
Search ZIP_DATA_DESCRIPTOR */
static const unsigned char zip_data_desc_header[]= {0x50, 0x4B, 0x07, 0x08};
static const unsigned char zip_data_desc_header[4]= {0x50, 0x4B, 0x07, 0x08};
int64_t pos = file_get_pos(fr->handle, zip_data_desc_header, 4);
#ifdef DEBUG_ZIP
log_trace("Searched footer, got length %lli\n", pos);
log_trace("Searched footer, got length %lli\n", (long long int)pos);
#endif
if (pos > 0)
{
@ -312,12 +312,12 @@ static int zip64_parse_end_central_dir(file_recovery_t *fr)
if (fseek(fr->handle, len, SEEK_CUR) == -1)
{
#ifdef DEBUG_ZIP
log_trace("zip: Unexpected EOF in end_central_dir_64: expected %llu bytes\n", len);
log_trace("zip: Unexpected EOF in end_central_dir_64: expected %llu bytes\n", (long long unsigned)len);
#endif
return -1;
}
#ifdef DEBUG_ZIP
log_trace("zip: End of 64b central dir of length %llu\n", len);
log_trace("zip: End of 64b central dir of length %llu\n", (long long unsigned)len);
#endif
}
@ -461,7 +461,7 @@ static void file_check_zip(file_recovery_t *fr)
header = le32(header);
#ifdef DEBUG_ZIP
log_trace("Header 0x%08X at 0x%llx\n", header, fr->file_size);
log_trace("Header 0x%08X at 0x%llx\n", header, (long long unsigned int)fr->file_size);
log_flush();
#endif
fr->file_size += 4;