New API function burn_drive_equals_adr()
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@ -1 +1 @@
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#define Cdrskin_timestamP "2007.09.22.151712"
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#define Cdrskin_timestamP "2007.09.23.163301"
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@ -2207,3 +2207,123 @@ int burn_drive_get_drive_role(struct burn_drive *d)
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return d->drive_role;
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}
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/* ts A70923
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Hands out pointers *dpt to directory path and *npt to basename.
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Caution: the last '/' in adr gets replaced by a 0.
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*/
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static int burn__split_path(char *adr, char **dpt, char **npt)
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{
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*dpt = adr;
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*npt = strrchr(*dpt, '/');
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if (*npt == NULL) {
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*npt = *dpt;
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*dpt = ".";
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return 1;
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}
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**npt = 0;
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if(*npt == *dpt)
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*dpt = "/";
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(*npt)++;
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return 2;
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}
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/* ts A70923 : API */
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int burn_drive_equals_adr(struct burn_drive *d1, char *adr2, int role2)
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{
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struct stat stbuf1, stbuf2;
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char adr1[BURN_DRIVE_ADR_LEN];
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char conv_adr1[BURN_DRIVE_ADR_LEN], conv_adr2[BURN_DRIVE_ADR_LEN];
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char *npt1, *dpt1, *npt2, *dpt2;
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int role1, stat_ret1, stat_ret2, conv_ret2;
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role1 = burn_drive_get_drive_role(d1);
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burn_drive_d_get_adr(d1, adr1);
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stat_ret1 = stat(adr1, &stbuf1);
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if (strlen(adr2) >= BURN_DRIVE_ADR_LEN)
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return -1;
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stat_ret2 = stat(adr2, &stbuf2);
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conv_ret2 = burn_drive_convert_fs_adr(adr2, conv_adr2);
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if (strcmp(adr1, adr2) == 0 && role1 == role2)
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return(1); /* equal role and address */
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if (role1 == 1 && role2 == 1) {
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/* MMC drive meets wannabe MMC drive */
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if (conv_ret2 <= 0)
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return 0; /* no MMC drive at adr2 */
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if (strcmp(adr1, conv_adr2) == 0)
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return 1; /* equal real MMC drives */
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return 0;
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} else if (role1 == 0 || role2 == 0)
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return 0; /* one null-drive, one not */
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else if (role1 != 1 && role2 != 1) {
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/* pseudo-drive meets file object */
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if (stat_ret1 == -1 || stat_ret2 == -1) {
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if (stat_ret1 != -1 || stat_ret2 != -1)
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return 0; /* one adress existing, one not */
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/* Two non-existing file objects */
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strcpy(conv_adr1, adr1);
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burn__split_path(conv_adr1, &dpt1, &npt1);
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strcpy(conv_adr2, adr2);
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burn__split_path(conv_adr2, &dpt2, &npt2);
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if (strcmp(npt1, npt2))
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return 0; /* basenames differ */
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stat_ret1= stat(adr1, &stbuf1);
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stat_ret2= stat(adr2, &stbuf2);
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if (stat_ret1 != stat_ret2)
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return 0; /* one dir existing, one not */
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/* Both directories exist. The basenames are equal.
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So the adresses are equal if the directories are
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equal.*/
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}
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if (stbuf1.st_ino == stbuf2.st_ino &&
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stbuf1.st_dev == stbuf2.st_dev)
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return 1; /* same filesystem object */
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if (S_ISBLK(stbuf1.st_mode) && S_ISBLK(stbuf2.st_mode) &&
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stbuf1.st_rdev == stbuf2.st_rdev)
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return 1; /* same major,minor device number */
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/* Are both filesystem objects related to the same MMC drive */
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if (conv_ret2 <= 0)
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return 0; /* no MMC drive at adr2 */
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if (burn_drive_convert_fs_adr(adr1, conv_adr1) <= 0)
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return 0; /* no MMC drive at adr1 */
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if (strcmp(conv_adr1, conv_adr2) == 0)
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return 1; /* same MMC drive */
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return 0; /* all filesystem disguises are checked */
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} else if (role1 == 1 && role2 != 1) {
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/* MMC drive meets file object */
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if (conv_ret2 <= 0)
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return 0; /* no MMC drive at adr2 */
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if (strcmp(adr1, conv_adr2) == 0)
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return 1; /* same MMC drive */
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return 0;
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} else if (role1 != 1 && role2 == 1) {
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/* stdio-drive meets wannabe MMC drive */
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if (conv_ret2 <= 0)
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return 0; /* no MMC drive at adr2 */
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if (burn_drive_convert_fs_adr(adr1, conv_adr1) <= 0)
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return 0; /* no MMC drive at adr1 */
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if (strcmp(conv_adr1, conv_adr2) == 0)
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return 1; /* same MMC drive */
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return 0;
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}
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return 0; /* now i believe they are really not equal */
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}
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@ -1998,6 +1998,7 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
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char data[], off_t data_size, off_t *data_count, int flag);
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/* A70904 */
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/** Inquire wether the drive object is a real MMC drive or a pseudo-drive
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created by burn_drive_dummy().
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@param d The drive to inquire
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@ -2008,6 +2009,33 @@ int burn_read_data(struct burn_drive *d, off_t byte_address,
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int burn_drive_get_drive_role(struct burn_drive *d);
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/* ts A70923 */
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/** Find out wether a given address string would lead to the given drive
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object. This should be done in advance for track source addresses
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with parameter drive_role set to 2.
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Although a real MMC drive should hardly exist as two drive objects at
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the same time, this can easily happen with stdio-drives. So if more than
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one drive is used by the application, then this gesture is advised:
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burn_drive_d_get_adr(d2, adr2);
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if (burn_drive_equals_adr(d1, adr2, burn_drive_get_drive_role(d2)))
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... Both drive objects point to the same storage facility ...
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@param d1 Existing drive object
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@param adr2 Address string to be tested. Prefix "stdio:" overrides
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parameter drive_role2 by either 0 or 2 as appropriate.
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The string must be shorter than BURN_DRIVE_ADR_LEN.
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@param drive_role2 Role as burn_drive_get_drive_role() would attribute
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to adr2 if it was a drive. Use value 2 for checking track
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sources resp. pseudo-drive addresses without "stdio:".
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Use 1 for checking drive addresses including those with
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prefix "stdio:".
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@return 1= adr2 leads to d1 , 0= adr2 seems not to lead to d1,
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-1 = adr2 is bad
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*/
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int burn_drive_equals_adr(struct burn_drive *d1, char *adr2, int drive_role2);
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#ifndef DOXYGEN
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BURN_END_DECLS
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