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Practice more defensive programming.

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This commit is contained in:
rocky
2003-10-03 08:36:39 +00:00
parent ae84a8ee00
commit 8cc16ea8ba
2 changed files with 14 additions and 4 deletions
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15
example/sample1.c
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@@ -1,5 +1,5 @@
/* /*
$Id: sample1.c,v 1.4 2003/10/03 01:09:43 rocky Exp $ $Id: sample1.c,v 1.5 2003/10/03 08:36:39 rocky Exp $
Copyright (C) 2003 Rocky Bernstein <rocky@panix.com> Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
@@ -30,10 +30,19 @@ int
main(int argc, const char *argv[]) main(int argc, const char *argv[])
{ {
CdIo *cdio = cdio_open (NULL, DRIVER_UNKNOWN); CdIo *cdio = cdio_open (NULL, DRIVER_UNKNOWN);
track_t first_track_num = cdio_get_first_track_num(cdio); track_t first_track_num;
track_t num_tracks = cdio_get_num_tracks(cdio); track_t num_tracks;
int j, i=first_track_num; int j, i=first_track_num;
if (NULL == cdio) {
printf("Couldn't find a driver.. leaving.\n");
return 1;
}
num_tracks = cdio_get_num_tracks(cdio);
first_track_num = i = cdio_get_first_track_num(cdio);
printf("CD-ROM Track List (%i - %i)\n", first_track_num, num_tracks); printf("CD-ROM Track List (%i - %i)\n", first_track_num, num_tracks);
printf(" #: LSN\n"); printf(" #: LSN\n");

3
example/sample3.c
View File

@@ -1,5 +1,5 @@
/* /*
$Id: sample3.c,v 1.4 2003/09/28 22:11:00 rocky Exp $ $Id: sample3.c,v 1.5 2003/10/03 08:36:39 rocky Exp $
Copyright (C) 2003 Rocky Bernstein <rocky@panix.com> Copyright (C) 2003 Rocky Bernstein <rocky@panix.com>
@@ -130,6 +130,7 @@ main(int argc, const char *argv[])
if (NULL == cdio) { if (NULL == cdio) {
printf("Problem in trying to find a driver.\n\n"); printf("Problem in trying to find a driver.\n\n");
return 1;
} }
first_track_num = cdio_get_first_track_num(cdio); first_track_num = cdio_get_first_track_num(cdio);