Enlightenment CVS committal
Author : lordchaos
Project : e17
Module : apps/evfs
Dir : e17/apps/evfs/src/plugins
Modified Files:
evfs_fs_tar.c
Log Message:
* Support for pre-GNU tar files (Damn 'gnome' - why would you use a really old
tar??))
===================================================================
RCS file: /cvsroot/enlightenment/e17/apps/evfs/src/plugins/evfs_fs_tar.c,v
retrieving revision 1.7
retrieving revision 1.8
diff -u -3 -r1.7 -r1.8
--- evfs_fs_tar.c 3 Nov 2005 12:39:46 -0000 1.7
+++ evfs_fs_tar.c 4 Nov 2005 13:52:51 -0000 1.8
@@ -26,6 +26,7 @@
# include <config.h>
#endif
+#include <math.h>
#include <evfs.h>
#include <unistd.h>
#include <stdio.h>
@@ -38,6 +39,11 @@
#include <dirent.h>
#include <tarpet.h>
+#define uintmax_t long
+#define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
+static uintmax_t from_header (const char *, size_t, const char *,
+ uintmax_t, uintmax_t);
+
evfs_filereference* evfs_file_top_level_find(evfs_filereference* file) {
evfs_filereference* top = file;
@@ -95,6 +101,80 @@
Ecore_Hash* tar_cache;
+
+int octal_checksum_to_int(char checksum[8]) {
+ int i;
+ int r_val=0;
+ int c_val=0;
+ int c=0;
+ int go=0;
+ for (i=7;i>=0;i--) {
+ if (go) {
+ c_val = checksum[i] - '0';
+ //printf("%d: cval is %d\n",i, c_val);
+ r_val += c_val * (pow(8,c));
+ //printf("r_val becomes: %d ---- r_val += %d * 8 ^
%d\n", r_val, c_val, c);
+ c++;
+ }
+
+ if (!go && (checksum[i] == 0)) go=1;
+
+ }
+
+ return r_val;
+}
+
+//////////////////////////////////////////////////////////////////
+///*Narfed from gnu-tar
+int tar_checksum (union TARPET_block* block)
+{
+ size_t i;
+ int unsigned_sum = 0; /* the POSIX one :-) */
+ int signed_sum = 0; /* the Sun one :-( */
+ int recorded_sum;
+ uintmax_t parsed_sum;
+ char *p;
+
+ p = (char*)block->raw.data;
+ for (i = sizeof *block; i-- != 0;)
+ {
+ unsigned_sum += (unsigned char) *p;
+ signed_sum += (signed char) (*p++);
+ }
+
+ if (unsigned_sum == 0)
+ return 0;
+
+ /* Adjust checksum to count the "chksum" field as blanks. */
+
+ for (i = sizeof block->p.checksum; i-- != 0;)
+ {
+ unsigned_sum -= (unsigned char) block->p.checksum[i];
+ signed_sum -= (signed char) (block->p.checksum[i]);
+ }
+ unsigned_sum += ' ' * sizeof block->p.checksum;
+ signed_sum += ' ' * sizeof block->p.checksum;
+
+ /*parsed_sum = from_header (block->p.checksum,
+ sizeof block->p.checksum, 0,
+ (uintmax_t) 0,
+ (uintmax_t) TYPE_MAXIMUM (int));
+ if (parsed_sum == (uintmax_t) -1)
+ return 0;
+
+ recorded_sum = parsed_sum;*/
+
+ //printf("Unsigned sum is %d\n", unsigned_sum);
+ //printf("Signed sum is: %d\n", signed_sum);
+
+
+ /*if (unsigned_sum != recorded_sum && signed_sum != recorded_sum)
+ return 0;*/
+
+ return unsigned_sum;
+}
+///////////////////////////////////////////////////////
+
void tar_name_split(union TARPET_block* block , struct tar_file* tar) {
char* tok;
char* path = strdup(block->p.name);
@@ -254,10 +334,21 @@
printf("Magic is '%s'\n", block.p.magic);
printf("Flag is %d\n", block.p.typeflag);*/
+
+ //printf("Checksum is: '%s'\n", block.p.checksum);
+ //printf("Int checksum is: %d\n", );
+
+ tar_name_split(&block, tar);
+ find++;
+ } else if (tar_checksum(&block) ==
octal_checksum_to_int(block.p.checksum)) {
+ //printf("old magic\n");
tar_name_split(&block, tar);
find++;
+
} else {
- //printf("No magic - '%s'\n", block.p.magic);
+ /*int i = tar_checksum(&block);
+ int j = octal_checksum_to_int(block.p.checksum);
+ printf("%d : %d\n", i,j);*/
}
}
evfs_uri_close(client, p_ref);
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