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Outsourced stream comparison from iso_file_src_cmp() to iso_stream_cmp_ino()

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This commit is contained in:
Thomas Schmitt 2009-05-03 08:42:45 +02:00
parent da4634a593
commit 1cbae01f12
3 changed files with 58 additions and 39 deletions
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44
libisofs/filesrc.c
View File

@ -12,20 +12,18 @@
#include "writer.h"
#include "messages.h"
#include "image.h"
#include "stream.h"
#include <stdlib.h>
#include <string.h>
#include <limits.h>
/* ts A90427 : introduced test (n1 == n2) and flattened block nesting
/* ts A90502 : outsourced comparison to iso_stream_cmp_ino()
*/
int iso_file_src_cmp(const void *n1, const void *n2)
{
int ret;
const IsoFileSrc *f1, *f2;
unsigned int fs_id1, fs_id2;
dev_t dev_id1, dev_id2;
ino_t ino_id1, ino_id2;
off_t size1, size2;
if (n1 == n2) {
return 0; /* Normally just a shortcut.
@ -35,40 +33,8 @@ int iso_file_src_cmp(const void *n1, const void *n2)
f1 = (const IsoFileSrc *)n1;
f2 = (const IsoFileSrc *)n2;
iso_stream_get_id(f1->stream, &fs_id1, &dev_id1, &ino_id1);
iso_stream_get_id(f2->stream, &fs_id2, &dev_id2, &ino_id2);
#ifdef Libisofs_file_src_cmp_non_zerO
if (fs_id1 == 0 && dev_id1 == 0 && ino_id1 == 0) {
return -1;
} else if (fs_id2 == 0 && dev_id2 == 0 && ino_id2 == 0)
return 1;
}
#endif
if (fs_id1 < fs_id2) {
return -1;
} else if (fs_id1 > fs_id2) {
return 1;
}
/* files belong to the same fs */
if (dev_id1 > dev_id2) {
return -1;
} else if (dev_id1 < dev_id2) {
return 1;
} else if (ino_id1 < ino_id2) {
return -1;
} else if (ino_id1 > ino_id2) {
return 1;
}
size1 = iso_stream_get_size(f1->stream);
size2 = iso_stream_get_size(f2->stream);
if (size1 < size2) {
return -1;
} else if (size1 > size2) {
return 1;
}
return 0;
ret = iso_stream_cmp_ino(f1->stream, f2->stream, 0);
return ret;
}
int iso_file_src_create(Ecma119Image *img, IsoFile *file, IsoFileSrc **src)

49
libisofs/stream.c
View File

@ -728,3 +728,52 @@ int iso_stream_set_image_ino(IsoStream *stream, ino_t ino, int flag)
return 0;
}
/* ts A90502 */
/* The former core of iso_file_src_cmp() */
int iso_stream_cmp_ino(IsoStream *s1, IsoStream *s2, int flag)
{
unsigned int fs_id1, fs_id2;
dev_t dev_id1, dev_id2;
ino_t ino_id1, ino_id2;
off_t size1, size2;
if (s1 == s2) {
return 0; /* Normally just a shortcut.
But important if Libisofs_file_src_cmp_non_zerO */
}
iso_stream_get_id(s1, &fs_id1, &dev_id1, &ino_id1);
iso_stream_get_id(s2, &fs_id2, &dev_id2, &ino_id2);
#ifdef Libisofs_file_src_cmp_non_zerO
if (fs_id1 == 0 && dev_id1 == 0 && ino_id1 == 0) {
return -1;
} else if (fs_id2 == 0 && dev_id2 == 0 && ino_id2 == 0)
return 1;
}
#endif
if (fs_id1 < fs_id2) {
return -1;
} else if (fs_id1 > fs_id2) {
return 1;
}
/* files belong to the same fs */
if (dev_id1 > dev_id2) {
return -1;
} else if (dev_id1 < dev_id2) {
return 1;
} else if (ino_id1 < ino_id2) {
return -1;
} else if (ino_id1 > ino_id2) {
return 1;
}
size1 = iso_stream_get_size(s1);
size2 = iso_stream_get_size(s2);
if (size1 < size2) {
return -1;
} else if (size1 > size2) {
return 1;
}
return 0;
}

4
libisofs/stream.h
View File

@ -82,4 +82,8 @@ int iso_stream_get_src_zf(IsoStream *stream, int *header_size_div4,
*/
int iso_stream_set_image_ino(IsoStream *stream, ino_t ino, int flag);
/* ts A90502 */
/* The former core of iso_file_src_cmp() */
int iso_stream_cmp_ino(IsoStream *s1, IsoStream *s2, int flag);
#endif /*STREAM_H_*/