static gint
csmfile_detect(const GwyFileDetectInfo *fileinfo,
gboolean only_name)
{
guint size, xres, yres;
if (only_name)
return g_str_has_suffix(fileinfo->name_lowercase, EXTENSION) ? 20 : 0;
// Weed out files that do not pretend to be Windows bitmaps quickly.
if (fileinfo->buffer_len < BMP_HEADER_SIZE
|| !read_bmp_header(fileinfo->head, &size, &xres, &yres))
return 0;
// Weed out incorrect Windows bitmaps but also those no extra data beyond
// the nominal end.
if (fileinfo->file_size <= size)
return 0;
// Look for "Version = CSPM" somewhere near the end.
if (!gwy_memmem(fileinfo->tail, fileinfo->buffer_len,
MAGIC, MAGIC_SIZE))
return 0;
return 90;
}
static guint
find_data_start(const guchar *buffer,
gsize size)
{
const guchar *p;
p = gwy_memmem(buffer, size, DATA_MAGIC, DATA_MAGIC_SIZE);
return p ? (p - buffer) + DATA_MAGIC_SIZE : 0;
}
static gint
x3p_detect(const GwyFileDetectInfo *fileinfo,
gboolean only_name)
{
unzFile zipfile;
guchar *content;
gint score = 0;
if (only_name)
return g_str_has_suffix(fileinfo->name_lowercase, EXTENSION) ? 15 : 0;
/* Generic ZIP file. */
if (fileinfo->file_size < MAGIC_SIZE
|| memcmp(fileinfo->head, MAGIC, MAGIC_SIZE) != 0)
return 0;
/* It contains main.xml and maybe directory bindata. One of them should be
* somewehre near the begining of the file. */
if (!gwy_memmem(fileinfo->head, fileinfo->buffer_len,
MAGIC1, MAGIC1_SIZE)
&& !gwy_memmem(fileinfo->head, fileinfo->buffer_len,
MAGIC2, MAGIC2_SIZE))
return 0;
/* We have to realy look inside. And since main.xml is a popular name
* for the main XML document within such files, we also have to see if
* we find "ISO5436_2" somewehre near the begining of the file. */
if ((zipfile = gwyminizip_unzOpen(fileinfo->name))) {
if (unzLocateFile(zipfile, "main.xml", 1) == UNZ_OK) {
if ((content = x3p_get_file_content(zipfile, NULL, NULL))) {
if (g_strstr_len(content, 4096, "ISO5436_2"))
score = 100;
g_free(content);
}
}
unzClose(zipfile);
}
return score;
}
