1
2 /*
3 * Author:
4 * Guido Draheim <guidod@gmx.de>
5 * Tomi Ollila <Tomi.Ollila@iki.fi>
6 *
7 * Copyright (c) Guido Draheim, use under copyleft (LGPL,MPL)
8 *
9 * Description:
10 * although this file is defining a function called zzip_stat it
11 * will not need a real stat(2) exported by the Operating System.
12 * It will just try to fill the fields of the ZZIP_STAT structure
13 * of
14 */
15
16 #include <zzip/lib.h> /* exported... */
17 #include <zzip/file.h>
18 #include <string.h>
19 #if defined(_AIX)
20 #include <strings.h> /* for strcasecmp */
21 #endif
22 #include <sys/stat.h>
23
24 #define ZZIP_USE_INTERNAL
25 #include <zzip/info.h>
26
27 /** get meta infornation on a zipped element.
28 * This function obtains information about a filename in an opened zip-archive
29 * without opening that file first. Mostly used to obtain the uncompressed
30 * size of a file inside a zip-archive. see => zzip_dir_open.
31 */
32 int
zzip_dir_stat(ZZIP_DIR * dir,zzip_char_t * name,ZZIP_STAT * zs,int flags)33 zzip_dir_stat(ZZIP_DIR * dir, zzip_char_t * name, ZZIP_STAT * zs, int flags)
34 {
35 struct zzip_dir_hdr *hdr = dir->hdr0;
36 int (*cmp) (zzip_char_t *, zzip_char_t *);
37
38 if (flags & ZZIP_CASEINSENSITIVE) flags |= ZZIP_CASELESS;
39 cmp = (flags & ZZIP_CASELESS) ? strcasecmp : strcmp;
40
41 if (! hdr)
42 {
43 dir->errcode = ZZIP_ENOENT;
44 return -1;
45 }
46
47 if (flags & ZZIP_IGNOREPATH)
48 {
49 char *n = strrchr(name, '/');
50 if (n)
51 name = n + 1;
52 }
53
54 while (1)
55 {
56 register char *hdr_name = hdr->d_name;
57 if (flags & ZZIP_IGNOREPATH)
58 {
59 register char *n = strrchr(hdr_name, '/');
60 if (n)
61 hdr_name = n + 1;
62 }
63
64 if (! cmp(hdr_name, name))
65 break;
66
67 if (! hdr->d_reclen)
68 {
69 dir->errcode = ZZIP_ENOENT;
70 return -1;
71 }
72
73 hdr = (struct zzip_dir_hdr *) ((char *) hdr + hdr->d_reclen);
74 }
75
76 zs->d_compr = hdr->d_compr;
77 zs->d_csize = hdr->d_csize;
78 zs->st_size = hdr->d_usize;
79 zs->d_name = hdr->d_name;
80
81 return 0;
82 }
83
84 /** => zzip_dir_stat
85 * This function will obtain information about a opened file _within_ a
86 * zip-archive. The file is supposed to be open (otherwise -1 is returned).
87 * The st_size stat-member contains the uncompressed size. The optional
88 * d_name is never set here.
89 */
90 int
zzip_file_stat(ZZIP_FILE * file,ZZIP_STAT * zs)91 zzip_file_stat(ZZIP_FILE * file, ZZIP_STAT * zs)
92 {
93 if (! file)
94 return -1;
95 zs->d_compr = file->method;
96 zs->d_csize = file->csize;
97 zs->st_size = file->usize;
98 zs->d_name = 0;
99 return 0;
100 }
101
102 /** => zzip_dir_stat
103 * This function will obtain information about a opened file which may be
104 * either real/zipped. The file is supposed to be open (otherwise -1 is
105 * returned). The st_size stat-member contains the uncompressed size.
106 * The optional d_name is never set here. For a real file, we do set the
107 * d_csize := st_size and d_compr := 0 for meaningful defaults.
108 */
109 int
zzip_fstat(ZZIP_FILE * file,ZZIP_STAT * zs)110 zzip_fstat(ZZIP_FILE * file, ZZIP_STAT * zs)
111 {
112 if (ZZIP_file_real(file))
113 {
114 struct stat st;
115 if (fstat(file->fd, &st) < 0)
116 return -1;
117 zs->st_size = st.st_size;
118 zs->d_csize = st.st_size;
119 zs->d_compr = 0;
120 return 0;
121 } else
122 {
123 return zzip_file_stat(file, zs);
124 }
125 }
126
127 /*
128 * Local variables:
129 * c-file-style: "stroustrup"
130 * End:
131 */
132