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Simplify code. Add usage.

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This commit is contained in:
rocky
2006-03-02 18:46:30 +00:00
parent d4ea2bfcaf
commit c2d5b7e0fe
4 changed files with 131 additions and 77 deletions
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61
example/C++/iso2.cpp
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@@ -1,7 +1,7 @@
/*
$Id: iso2.cpp,v 1.6 2005/11/10 11:22:55 rocky Exp $
$Id: iso2.cpp,v 1.7 2006/03/02 18:46:30 rocky Exp $
Copyright (C) 2003, 2004, 2005 Rocky Bernstein <rocky@panix.com>
Copyright (C) 2003, 2004, 2005, 2006 Rocky Bernstein <rocky@panix.com>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@
*/
/* Simple program to show using libiso9660 to extract a file from a
cue/bin CD-IMAGE.
CUE/BIN CD image.
If a single argument is given, it is used as the CUE file of a CD image
to use. Otherwise a compiled-in default image name (that
@@ -69,6 +69,8 @@
#include <sys/types.h>
#endif
#define CEILING(x, y) ((x+(y-1))/y)
#define my_exit(rc) \
fclose (p_outfd); \
free(p_statbuf); \
@@ -88,6 +90,12 @@ main(int argc, const char *argv[])
char untranslated_name[256] = ISO9660_PATH;
CdIo_t *p_cdio;
if (argc > 3) {
printf("usage %s [CD-ROM-or-image [filename]]\n", argv[0]);
printf("Extracts filename from CD-ROM-or-image.\n");
return 1;
}
if (argc > 1)
psz_image = argv[1];
else
@@ -128,30 +136,33 @@ main(int argc, const char *argv[])
}
/* Copy the blocks from the ISO-9660 filesystem to the local filesystem. */
for (i = 0; i < p_statbuf->size; i += ISO_BLOCKSIZE)
{
char buf[ISO_BLOCKSIZE];
memset (buf, 0, ISO_BLOCKSIZE);
if ( 0 != cdio_read_data_sectors (p_cdio, buf,
p_statbuf->lsn + (i / ISO_BLOCKSIZE),
ISO_BLOCKSIZE, 1) )
{
const unsigned int i_blocks = CEILING(p_statbuf->size, ISO_BLOCKSIZE);
for (i = 0; i < i_blocks; i ++)
{
fprintf(stderr, "Error reading ISO 9660 file at lsn %lu\n",
(long unsigned int) p_statbuf->lsn + (i / ISO_BLOCKSIZE));
my_exit(4);
char buf[ISO_BLOCKSIZE];
const lsn_t lsn = p_statbuf->lsn + i;
memset (buf, 0, ISO_BLOCKSIZE);
if ( 0 != cdio_read_data_sectors (p_cdio, buf, lsn, ISO_BLOCKSIZE, 1) )
{
fprintf(stderr, "Error reading ISO 9660 file at lsn %lu\n",
(long unsigned int) p_statbuf->lsn);
my_exit(4);
}
fwrite (buf, ISO_BLOCKSIZE, 1, p_outfd);
if (ferror (p_outfd))
{
perror ("fwrite()");
my_exit(5);
}
}
fwrite (buf, ISO_BLOCKSIZE, 1, p_outfd);
if (ferror (p_outfd))
{
perror ("fwrite()");
my_exit(5);
}
}
}
fflush (p_outfd);