/* See if a file can be decompressed */
static dsk_err_t comp_iopen(COMPRESS_DATA **cd, const char *filename, int nc)
{
COMPRESS_CLASS *cc = classes[nc];
dsk_err_t err;
if (!cc) return DSK_ERR_BADPTR;
(*cd) = dsk_malloc(cc->cc_selfsize);
if (!*cd) return DSK_ERR_NOMEM;
memset((*cd), 0, cc->cc_selfsize);
err = comp_construct(*cd, filename);
(*cd)->cd_class = cc;
if (err == DSK_ERR_OK)
{
char *s = dsk_malloc(strlen(cc->cc_description) + 50);
if (s)
{
sprintf(s, "Checking compression: %s...", cc->cc_description);
dsk_report(s);
dsk_free(s);
}
else dsk_report("Checking compression...");
err = (cc->cc_open)(*cd);
dsk_report_end();
}
if (err == DSK_ERR_OK) return err;
comp_free (*cd);
*cd = NULL;
return err;
}
dsk_err_t comp_abort(COMPRESS_DATA **self)
{
dsk_err_t e;
if (!self || (!(*self)) || (!(*self)->cd_class)) return DSK_ERR_BADPTR;
e = ((*self)->cd_class->cc_abort)(*self);
if ((*self)->cd_ufilename) remove((*self)->cd_ufilename);
comp_free (*self);
*self = NULL;
return e;
}
dsk_err_t comp_commit(COMPRESS_DATA **self)
{
dsk_err_t e;
if (!self || (!(*self)) || (!(*self)->cd_class)) return DSK_ERR_BADPTR;
dsk_report("Compressing...");
e = ((*self)->cd_class->cc_commit)(*self);
dsk_report_end();
if ((*self)->cd_ufilename) remove((*self)->cd_ufilename);
comp_free (*self);
*self = NULL;
return e;
}
/* See if a file can be decompressed */
static dsk_err_t comp_icreat(COMPRESS_DATA **cd, const char *filename, int nc)
{
COMPRESS_CLASS *cc = classes[nc];
dsk_err_t err;
FILE *fp;
if (!cc) return DSK_ERR_BADPTR;
(*cd) = dsk_malloc(cc->cc_selfsize);
if (!*cd) return DSK_ERR_NOMEM;
memset((*cd), 0, cc->cc_selfsize);
err = comp_construct(*cd, filename);
(*cd)->cd_class = cc;
if (err == DSK_ERR_OK) err = (cc->cc_creat)(*cd);
/* Stake out our claim to the temporary file. */
if (err == DSK_ERR_OK) err = comp_mktemp(*cd, &fp);
if (fp) fclose(fp);
if (err == DSK_ERR_OK) return err;
comp_free (*cd);
*cd = NULL;
return err;
}
static void comp_free__(void *__comp) {
comp_type *comp = (comp_type *) __comp;
comp_free(comp);
}
