source/libs/zziplib/zziplib-0.13.62/zzip/stat.c

   1
   2 /*
   3  * Author:
   4  *      Guido Draheim <guidod@gmx.de>
   5  *      Tomi Ollila <Tomi.Ollila@iki.fi>
   6  *
   7  * Copyright (c) 1999,2000,2001,2002 Guido Draheim
   8  *          All rights reserved,
   9  *          use under the restrictions of the
  10  *          Lesser GNU General Public License
  11  *          or alternatively the restrictions
  12  *          of the Mozilla Public License 1.1
  13  *
  14  * Description:
  15  *      although this file is defining a function called zzip_stat it
  16  *      will not need a real stat(2) exported by the Operating System.
  17  *      It will just try to fill the fields of the ZZIP_STAT structure
  18  *      of
  19  */
  20
  21 #include <zzip/lib.h>           /* exported... */
  22 #include <zzip/file.h>
  23 #include <string.h>
  24 #if defined(_AIX)
  25 #include <strings.h> /* for strcasecmp */
  26 #endif
  27 #include <sys/stat.h>
  28
  29 #define ZZIP_USE_INTERNAL
  30 #include <zzip/info.h>
  31
  32 /**
  33  * obtain information about a filename in an opened zip-archive without
  34  * opening that file first. Mostly used to obtain the uncompressed
  35  * size of a file inside a zip-archive. see => zzip_dir_open.
  36  */
  37 int
  38 zzip_dir_stat(ZZIP_DIR * dir, zzip_char_t * name, ZZIP_STAT * zs, int flags)
  39 {
  40     struct zzip_dir_hdr *hdr = dir->hdr0;
  41     int (*cmp) (zzip_char_t *, zzip_char_t *);
  42
  43     if (flags & ZZIP_CASEINSENSITIVE) flags |= ZZIP_CASELESS;
  44     cmp = (flags & ZZIP_CASELESS) ? strcasecmp : strcmp;
  45
  46     if (! hdr)
  47     {
  48         dir->errcode = ZZIP_ENOENT;
  49         return -1;
  50     }
  51
  52     if (flags & ZZIP_IGNOREPATH)
  53     {
  54         char *n = strrchr(name, '/');
  55         if (n)
  56             name = n + 1;
  57     }
  58
  59     while (1)
  60     {
  61         register char *hdr_name = hdr->d_name;
  62         if (flags & ZZIP_IGNOREPATH)
  63         {
  64             register char *n = strrchr(hdr_name, '/');
  65             if (n)
  66                 hdr_name = n + 1;
  67         }
  68
  69         if (! cmp(hdr_name, name))
  70             break;
  71
  72         if (! hdr->d_reclen)
  73         {
  74             dir->errcode = ZZIP_ENOENT;
  75             return -1;
  76         }
  77
  78         hdr = (struct zzip_dir_hdr *) ((char *) hdr + hdr->d_reclen);
  79     }
  80
  81     zs->d_compr = hdr->d_compr;
  82     zs->d_csize = hdr->d_csize;
  83     zs->st_size = hdr->d_usize;
  84     zs->d_name = hdr->d_name;
  85
  86     return 0;
  87 }
  88
  89 /** => zzip_dir_stat
  90  * This function will obtain information about a opened file _within_ a
  91  * zip-archive. The file is supposed to be open (otherwise -1 is returned).
  92  * The st_size stat-member contains the uncompressed size. The optional
  93  * d_name is never set here.
  94  */
  95 int
  96 zzip_file_stat(ZZIP_FILE * file, ZZIP_STAT * zs)
  97 {
  98     if (! file)
  99         return -1;
 100     zs->d_compr = file->method;
 101     zs->d_csize = file->csize;
 102     zs->st_size = file->usize;
 103     zs->d_name = 0;
 104     return 0;
 105 }
 106
 107 /** => zzip_dir_stat
 108  * This function will obtain information about a opened file which may be
 109  * either real/zipped. The file is supposed to be open (otherwise -1 is
 110  * returned). The st_size stat-member contains the uncompressed size.
 111  * The optional d_name is never set here. For a real file, we do set the
 112  * d_csize := st_size and d_compr := 0 for meaningful defaults.
 113  */
 114 int
 115 zzip_fstat(ZZIP_FILE * file, ZZIP_STAT * zs)
 116 {
 117     if (ZZIP_file_real(file))
 118     {
 119         struct stat st;
 120         if (fstat(file->fd, &st) < 0)
 121             return -1;
 122         zs->st_size = st.st_size;
 123         zs->d_csize = st.st_size;
 124         zs->d_compr = 0;
 125         return 0;
 126     } else
 127     {
 128         return zzip_file_stat(file, zs);
 129     }
 130 }
 131
 132 /*
 133  * Local variables:
 134  * c-file-style: "stroustrup"
 135  * End:
 136  */