From 344d3baaf5bd8b98412ee55deb34e2136362fc31 Mon Sep 17 00:00:00 2001 From: Thomas Schmitt Date: Sun, 23 Sep 2007 16:33:21 +0000 Subject: [PATCH] New API function burn_drive_equals_adr() --- libburn/trunk/cdrskin/cdrskin_timestamp.h | 2 +- libburn/trunk/libburn/drive.c | 120 ++++++++++++++++++++++ libburn/trunk/libburn/libburn.h | 28 +++++ 3 files changed, 149 insertions(+), 1 deletion(-) diff --git a/libburn/trunk/cdrskin/cdrskin_timestamp.h b/libburn/trunk/cdrskin/cdrskin_timestamp.h index af4d7af6..4900c5ee 100644 --- a/libburn/trunk/cdrskin/cdrskin_timestamp.h +++ b/libburn/trunk/cdrskin/cdrskin_timestamp.h @@ -1 +1 @@ -#define Cdrskin_timestamP "2007.09.22.151712" +#define Cdrskin_timestamP "2007.09.23.163301" diff --git a/libburn/trunk/libburn/drive.c b/libburn/trunk/libburn/drive.c index b50433e3..86328d64 100644 --- a/libburn/trunk/libburn/drive.c +++ b/libburn/trunk/libburn/drive.c @@ -2207,3 +2207,123 @@ int burn_drive_get_drive_role(struct burn_drive *d) return d->drive_role; } + +/* ts A70923 + Hands out pointers *dpt to directory path and *npt to basename. + Caution: the last '/' in adr gets replaced by a 0. +*/ +static int burn__split_path(char *adr, char **dpt, char **npt) +{ + *dpt = adr; + *npt = strrchr(*dpt, '/'); + if (*npt == NULL) { + *npt = *dpt; + *dpt = "."; + return 1; + } + **npt = 0; + if(*npt == *dpt) + *dpt = "/"; + (*npt)++; + return 2; +} + + +/* ts A70923 : API */ +int burn_drive_equals_adr(struct burn_drive *d1, char *adr2, int role2) +{ + struct stat stbuf1, stbuf2; + char adr1[BURN_DRIVE_ADR_LEN]; + char conv_adr1[BURN_DRIVE_ADR_LEN], conv_adr2[BURN_DRIVE_ADR_LEN]; + char *npt1, *dpt1, *npt2, *dpt2; + int role1, stat_ret1, stat_ret2, conv_ret2; + + role1 = burn_drive_get_drive_role(d1); + burn_drive_d_get_adr(d1, adr1); + stat_ret1 = stat(adr1, &stbuf1); + + if (strlen(adr2) >= BURN_DRIVE_ADR_LEN) + return -1; + stat_ret2 = stat(adr2, &stbuf2); + conv_ret2 = burn_drive_convert_fs_adr(adr2, conv_adr2); + + if (strcmp(adr1, adr2) == 0 && role1 == role2) + return(1); /* equal role and address */ + if (role1 == 1 && role2 == 1) { + /* MMC drive meets wannabe MMC drive */ + if (conv_ret2 <= 0) + return 0; /* no MMC drive at adr2 */ + if (strcmp(adr1, conv_adr2) == 0) + return 1; /* equal real MMC drives */ + return 0; + + } else if (role1 == 0 || role2 == 0) + return 0; /* one null-drive, one not */ + + else if (role1 != 1 && role2 != 1) { + /* pseudo-drive meets file object */ + + if (stat_ret1 == -1 || stat_ret2 == -1) { + if (stat_ret1 != -1 || stat_ret2 != -1) + return 0; /* one adress existing, one not */ + + /* Two non-existing file objects */ + + strcpy(conv_adr1, adr1); + burn__split_path(conv_adr1, &dpt1, &npt1); + strcpy(conv_adr2, adr2); + burn__split_path(conv_adr2, &dpt2, &npt2); + if (strcmp(npt1, npt2)) + return 0; /* basenames differ */ + stat_ret1= stat(adr1, &stbuf1); + stat_ret2= stat(adr2, &stbuf2); + if (stat_ret1 != stat_ret2) + return 0; /* one dir existing, one not */ + + /* Both directories exist. The basenames are equal. + So the adresses are equal if the directories are + equal.*/ + } + if (stbuf1.st_ino == stbuf2.st_ino && + stbuf1.st_dev == stbuf2.st_dev) + return 1; /* same filesystem object */ + + if (S_ISBLK(stbuf1.st_mode) && S_ISBLK(stbuf2.st_mode) && + stbuf1.st_rdev == stbuf2.st_rdev) + return 1; /* same major,minor device number */ + + /* Are both filesystem objects related to the same MMC drive */ + if (conv_ret2 <= 0) + return 0; /* no MMC drive at adr2 */ + if (burn_drive_convert_fs_adr(adr1, conv_adr1) <= 0) + return 0; /* no MMC drive at adr1 */ + if (strcmp(conv_adr1, conv_adr2) == 0) + return 1; /* same MMC drive */ + + return 0; /* all filesystem disguises are checked */ + + } else if (role1 == 1 && role2 != 1) { + /* MMC drive meets file object */ + + if (conv_ret2 <= 0) + return 0; /* no MMC drive at adr2 */ + if (strcmp(adr1, conv_adr2) == 0) + return 1; /* same MMC drive */ + return 0; + + } else if (role1 != 1 && role2 == 1) { + /* stdio-drive meets wannabe MMC drive */ + + if (conv_ret2 <= 0) + return 0; /* no MMC drive at adr2 */ + if (burn_drive_convert_fs_adr(adr1, conv_adr1) <= 0) + return 0; /* no MMC drive at adr1 */ + if (strcmp(conv_adr1, conv_adr2) == 0) + return 1; /* same MMC drive */ + return 0; + + } + return 0; /* now i believe they are really not equal */ +} + + diff --git a/libburn/trunk/libburn/libburn.h b/libburn/trunk/libburn/libburn.h index 3e501000..00345ebf 100644 --- a/libburn/trunk/libburn/libburn.h +++ b/libburn/trunk/libburn/libburn.h @@ -1998,6 +1998,7 @@ int burn_read_data(struct burn_drive *d, off_t byte_address, char data[], off_t data_size, off_t *data_count, int flag); +/* A70904 */ /** Inquire wether the drive object is a real MMC drive or a pseudo-drive created by burn_drive_dummy(). @param d The drive to inquire @@ -2008,6 +2009,33 @@ int burn_read_data(struct burn_drive *d, off_t byte_address, int burn_drive_get_drive_role(struct burn_drive *d); +/* ts A70923 */ +/** Find out wether a given address string would lead to the given drive + object. This should be done in advance for track source addresses + with parameter drive_role set to 2. + Although a real MMC drive should hardly exist as two drive objects at + the same time, this can easily happen with stdio-drives. So if more than + one drive is used by the application, then this gesture is advised: + burn_drive_d_get_adr(d2, adr2); + if (burn_drive_equals_adr(d1, adr2, burn_drive_get_drive_role(d2))) + ... Both drive objects point to the same storage facility ... + + @param d1 Existing drive object + @param adr2 Address string to be tested. Prefix "stdio:" overrides + parameter drive_role2 by either 0 or 2 as appropriate. + The string must be shorter than BURN_DRIVE_ADR_LEN. + @param drive_role2 Role as burn_drive_get_drive_role() would attribute + to adr2 if it was a drive. Use value 2 for checking track + sources resp. pseudo-drive addresses without "stdio:". + Use 1 for checking drive addresses including those with + prefix "stdio:". + @return 1= adr2 leads to d1 , 0= adr2 seems not to lead to d1, + -1 = adr2 is bad +*/ +int burn_drive_equals_adr(struct burn_drive *d1, char *adr2, int drive_role2); + + + #ifndef DOXYGEN BURN_END_DECLS