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src/file_psb.c and src/file_psd.c: rewrote to use data structure

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This commit is contained in:
Christophe Grenier 2013-11-01 12:16:35 +01:00
parent 5109ffc9af
commit fa069497ed
2 changed files with 39 additions and 24 deletions
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17
src/file_psb.c
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@ -52,6 +52,17 @@ const file_hint_t file_hint_psb= {
static const unsigned char psb_header[6]={'8', 'B', 'P', 'S', 0x00, 0x02};
static uint64_t psb_image_data_size_max=0;
struct psb_file_header
{
char signature[4];
uint16_t version; /* must be 2 */
char reserved[6]; /* must be 0 */
uint16_t channels; /* between 1 and 56 */
uint32_t height; /* max of 300,000 */
uint32_t width; /* max of 300,000 */
uint16_t depth; /* 1, 8, 16 or 32 */
uint16_t color_mode; /* Bitmap = 0; Grayscale = 1; Indexed = 2; RGB = 3; CMYK = 4; Multichannel = 7; Duotone = 8; Lab = 9 */
} __attribute__ ((__packed__));
static void register_header_check_psb(file_stat_t *file_stat)
{
@ -126,10 +137,8 @@ static int psb_skip_image_resources(const unsigned char *buffer, const unsigned
static int psb_skip_color_mode(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
psb_image_data_size_max=(buffer[buffer_size/2+12]<<8 | buffer[buffer_size/2+13]) *
(buffer[buffer_size/2+14]<<24 | buffer[buffer_size/2+15] <<16 | buffer[buffer_size/2+16]<<8 | buffer[buffer_size/2+17]) *
(buffer[buffer_size/2+18]<<24 | buffer[buffer_size/2+19] <<16 | buffer[buffer_size/2+20]<<8 | buffer[buffer_size/2+21]) *
buffer[buffer_size/2+23] / 8;
const struct psb_file_header *psb=(const struct psb_file_header *)&buffer[buffer_size/2];
psb_image_data_size_max=(uint64_t)le16(psb->channels) * le32(psb->height) * le32(psb->width) * le16(psb->depth) / 8;
#ifdef DEBUG_PSD
log_info("psb_image_data_size_max %lu\n", (long unsigned)psb_image_data_size_max);
#endif

46
src/file_psd.c
View file

@ -50,28 +50,30 @@ const file_hint_t file_hint_psd= {
.register_header_check=&register_header_check_psd
};
static const unsigned char psd_header[6]={'8', 'B', 'P', 'S', 0x00, 0x01};
static uint64_t psd_image_data_size_max=0;
static void register_header_check_psd(file_stat_t *file_stat)
struct psd_file_header
{
register_header_check(0, psd_header,sizeof(psd_header), &header_check_psd, file_stat);
}
char signature[4];
uint16_t version; /* must be 1 */
char reserved[6]; /* must be 0 */
uint16_t channels; /* between 1 and 56 */
uint32_t height; /* max of 30,000 */
uint32_t width; /* max of 30,000 */
uint16_t depth; /* 1, 8, 16 or 32 */
uint16_t color_mode; /* Bitmap = 0; Grayscale = 1; Indexed = 2; RGB = 3; CMYK = 4; Multichannel = 7; Duotone = 8; Lab = 9 */
} __attribute__ ((__packed__));
static int header_check_psd(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(memcmp(buffer,psd_header,sizeof(psd_header))==0)
{
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=70;
file_recovery_new->extension=file_hint_psd.extension;
/* File header */
file_recovery_new->calculated_file_size=0x1a;
file_recovery_new->data_check=&psd_skip_color_mode;
file_recovery_new->file_check=&file_check_psd;
return 1;
}
return 0;
reset_file_recovery(file_recovery_new);
file_recovery_new->min_filesize=70;
file_recovery_new->extension=file_hint_psd.extension;
/* File header */
file_recovery_new->calculated_file_size=0x1a;
file_recovery_new->data_check=&psd_skip_color_mode;
file_recovery_new->file_check=&file_check_psd;
return 1;
}
static uint32_t get_be32(const void *buffer, const unsigned int offset)
@ -126,10 +128,8 @@ static int psd_skip_image_resources(const unsigned char *buffer, const unsigned
static int psd_skip_color_mode(const unsigned char *buffer, const unsigned int buffer_size, file_recovery_t *file_recovery)
{
psd_image_data_size_max=(buffer[buffer_size/2+12]<<8 | buffer[buffer_size/2+13]) *
(buffer[buffer_size/2+14]<<24 | buffer[buffer_size/2+15] <<16 | buffer[buffer_size/2+16]<<8 | buffer[buffer_size/2+17]) *
(buffer[buffer_size/2+18]<<24 | buffer[buffer_size/2+19] <<16 | buffer[buffer_size/2+20]<<8 | buffer[buffer_size/2+21]) *
buffer[buffer_size/2+23] / 8;
const struct psd_file_header *psd=(const struct psd_file_header *)&buffer[buffer_size/2];
psd_image_data_size_max=(uint64_t)le16(psd->channels) * le32(psd->height) * le32(psd->width) * le16(psd->depth) / 8;
#ifdef DEBUG_PSD
log_info("psd_image_data_size_max %lu\n", (long unsigned)psd_image_data_size_max);
#endif
@ -157,3 +157,9 @@ static void file_check_psd(file_recovery_t *file_recovery)
else if(file_recovery->file_size > file_recovery->calculated_file_size + psd_image_data_size_max)
file_recovery->file_size=file_recovery->calculated_file_size + psd_image_data_size_max;
}
static void register_header_check_psd(file_stat_t *file_stat)
{
static const unsigned char psd_header[6]={'8', 'B', 'P', 'S', 0x00, 0x01};
register_header_check(0, psd_header,sizeof(psd_header), &header_check_psd, file_stat);
}