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Added a simple unpacker example.
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icculus committed Mar 31, 2007
1 parent 0e3233a commit a8de53670ddf803e9451d79f177080852c5c2025
Showing with 182 additions and 0 deletions.
  1. +1 −0 CHANGELOG.txt
  2. +181 −0 extras/physfsunpack.c
@@ -2,6 +2,7 @@
* CHANGELOG.
*/

03312007 - Added a quick'n'dirty unpack utility to the extras directory.
03282007 - Logic bug in MVL/HOG/GRP archivers: only enumerated files when
looking in a directory other than the root, instead of enumerating
only for the root (thanks, Chris!). Minor fix for compilers that
@@ -0,0 +1,181 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>

#include "physfs.h"


static int failure = 0;

static void modTimeToStr(PHYSFS_sint64 modtime, char *modstr, size_t strsize)
{
const char *str = "unknown modtime";
if (modtime != -1)
{
time_t t = (time_t) modtime;
str = ctime(&t);
} /* if */

strncpy(modstr, str, strsize);
modstr[strsize-1] = '\0';
strsize = strlen(modstr);
while ((modstr[strsize-1] == '\n') || (modstr[strsize-1] == '\r'))
modstr[--strsize] = '\0';
} /* modTimeToStr */


static void fail(const char *what, const char *why)
{
if (why == NULL)
why = PHYSFS_getLastError();
fprintf(stderr, "%s failed: %s\n", what, why);
failure = 1;
} /* fail */


static void dumpFile(const char *fname)
{
const int origfailure = failure;
PHYSFS_File *out = NULL;
PHYSFS_File *in = NULL;

failure = 0;

if ((in = PHYSFS_openRead(fname)) == NULL)
fail("\nPHYSFS_openRead", NULL);
else if ((out = PHYSFS_openWrite(fname)) == NULL)
fail("\nPHYSFS_openWrite", NULL);
else
{
char modstr[64];
PHYSFS_sint64 size = PHYSFS_fileLength(in);

printf("(");
if (size == -1)
printf("?");
else
printf("%lld", (long long) size);
printf(" bytes");

modTimeToStr(PHYSFS_getLastModTime(fname), modstr, sizeof (modstr));
printf(", %s)\n", modstr);

while ( (!failure) && (!PHYSFS_eof(in)) )
{
static char buf[64 * 1024];
PHYSFS_sint64 br = PHYSFS_read(in, buf, 1, sizeof (buf));
if (br == -1)
fail("PHYSFS_read", NULL);
else
{
PHYSFS_sint64 bw = PHYSFS_write(out, buf, 1, br);
if (bw != br)
fail("PHYSFS_write", NULL);
else
size -= bw;
} /* else */
} /* while */

if ((!failure) && (size != 0))
fail("PHYSFS_eof", "BUG! eof != PHYSFS_fileLength bytes!");
} /* else */

if (in != NULL)
PHYSFS_close(in);

if (out != NULL)
{
if (!PHYSFS_close(out))
fail("PHYSFS_close", NULL);
} /* if */

if (failure)
PHYSFS_delete(fname);
else
failure = origfailure;
} /* dumpFile */


static void unpackCallback(void *_depth, const char *origdir, const char *str)
{
int depth = *((int *) _depth);
const int len = strlen(origdir) + strlen(str) + 2;
char *fname = (char *) malloc(len);
if (fname == NULL)
fail("malloc", "Out of memory!");
else
{
if (strcmp(origdir, "/") == 0)
origdir = "";

snprintf(fname, len, "%s/%s", origdir, str);

printf("%s ", fname);
if (PHYSFS_isDirectory(fname))
{
depth++;
printf("(directory)\n");
if (!PHYSFS_mkdir(fname))
fail("PHYSFS_mkdir", NULL);
else
PHYSFS_enumerateFilesCallback(fname, unpackCallback, &depth);
} /* if */

else if (PHYSFS_isSymbolicLink(fname))
{
printf("(symlink)\n");
/* !!! FIXME: ? if (!symlink(fname, */
} /* else if */

else /* ...file. */
{
dumpFile(fname);
} /* else */

free(fname);
} /* else */
} /* unpackCallback */


int main(int argc, char **argv)
{
int zero = 0;

if (argc != 3)
{
fprintf(stderr, "USAGE: %s <archive> <unpackDirectory>\n", argv[0]);
return 1;
} /* if */

if (!PHYSFS_init(argv[0]))
{
fprintf(stderr, "PHYSFS_init() failed: %s\n", PHYSFS_getLastError());
return 2;
} /* if */

if (!PHYSFS_setWriteDir(argv[2]))
{
fprintf(stderr, "PHYSFS_setWriteDir('%s') failed: %s\n",
argv[2], PHYSFS_getLastError());
return 3;
} /* if */

if (!PHYSFS_mount(argv[1], NULL, 1))
{
fprintf(stderr, "PHYSFS_mount('%s') failed: %s\n",
argv[1], PHYSFS_getLastError());
return 4;
} /* if */

PHYSFS_permitSymbolicLinks(1);
PHYSFS_enumerateFilesCallback("/", unpackCallback, &zero);
PHYSFS_deinit();
if (failure)
return 5;

return 0;
} /* main */

/* end of physfsunpack.c ... */

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