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Amiga Format CD 24
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Amiga Format AFCD24 (Feb 1998, Issue 108).iso
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-in_the_mag-
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emulation
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amiga
/
uae-0.7.0b2
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src
/
zfile.c
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C/C++ Source or Header
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1998-01-20
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5KB
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247 lines
/*
* UAE - The Un*x Amiga Emulator
*
* routines to handle compressed file automatically
*
* (c) 1996 Samuel Devulder, Tim Gunn
*/
#include "sysconfig.h"
#include "sysdeps.h"
#include "config.h"
#include "options.h"
#include "zfile.h"
#ifdef USE_ZFILE
#ifdef AMIGA
extern char *amiga_dev_path; /* dev: */
extern char *ixemul_dev_path; /* /dev/ */
extern int readdevice (const char *, char *);
#endif
static struct zfile
{
struct zfile *next;
FILE *f;
char name[L_tmpnam];
} *zlist;
/*
* called on exit()
*/
void zfile_exit(void)
{
struct zfile *l;
while ((l = zlist)) {
zlist = l->next;
fclose(l->f);
unlink(l->name); /* sam: in case unlink() after fopen() fails */
free(l);
}
}
/*
* fclose() but for a compressed file
*/
int zfile_close(FILE *f)
{
struct zfile *pl = NULL;
struct zfile *l = zlist;
int ret;
while(l && l->f!=f) {
pl = l;
l = l->next;
}
if (!l)
return fclose(f);
ret = fclose(l->f);
if(!pl)
zlist = l->next;
else
pl->next = l->next;
free(l);
return ret;
}
/*
* gzip decompression
*/
static int gunzip (const char *decompress, const char *src, const char *dst)
{
char cmd[1024];
if (!dst)
return 1;
sprintf (cmd, "%s -c -d %s >%s", decompress, src, dst);
return !system (cmd);
}
/*
* lha decompression
*/
static int lha (const char *src, const char *dst)
{
char cmd[1024];
if (!dst)
return 1;
#if defined(AMIGA)
sprintf (cmd, "lha -q -N p %s >%s", src, dst);
#else
sprintf (cmd, "lha pq %s >%s", src, dst);
#endif
return !system (cmd);
}
/*
* (pk)unzip decompression
*/
static int unzip(const char *src, const char *dst)
{
char cmd[1024];
if (!dst)
return 1;
#if defined AMIGA || defined __unix
sprintf (cmd, "unzip -p %s '*.adf' >%s", src, dst);
return !system (cmd);
#endif
}
/*
* decompresses the file (or check if dest is null)
*/
static int uncompress(const char *name, char *dest)
{
char *ext = strrchr (name, '.');
char nam[1024];
if (ext != NULL && access (name, 0) >= 0) {
ext++;
if (strcasecmp (ext, "z") == 0
|| strcasecmp (ext, "gz") == 0
|| strcasecmp (ext, "adz") == 0
|| strcasecmp (ext, "roz") == 0)
return gunzip ("gzip", name, dest);
if (strcasecmp (ext, "bz") == 0)
return gunzip ("bzip", name, dest);
if (strcasecmp (ext, "bz2") == 0)
return gunzip ("bzip2", name, dest);
#ifndef __DOS__
if (strcasecmp (ext, "lha") == 0
|| strcasecmp (ext, "lzh") == 0)
return lha (name, dest);
if (strcasecmp (ext, "zip") == 0)
return unzip (name, dest);
#endif
}
if (access (strcat (strcpy (nam, name), ".z"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".Z"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".gz"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".GZ"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".adz"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".roz"), 0) >= 0)
return gunzip ("gzip", nam, dest);
if (access (strcat (strcpy (nam, name), ".bz"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".BZ"), 0) >= 0)
return gunzip ("bzip", nam, dest);
if (access (strcat (strcpy (nam, name), ".bz2"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".BZ2"), 0) >= 0)
return gunzip ("bzip2", nam, dest);
#ifndef __DOS__
if (access (strcat (strcpy (nam, name), ".lha"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".LHA"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".lzh"), 0) >= 0
|| access (strcat (strcpy (nam, name), ".LZH"), 0) >= 0)
return lha (nam, dest);
if (access (strcat (strcpy (nam, name),".zip"),0) >= 0
|| access (strcat (strcpy (nam, name),".ZIP"),0) >= 0)
return unzip (nam, dest);
#endif
#if defined(AMIGA)
/* sam: must be before real access to work */
if (!strnicmp (name, ixemul_dev_path, strlen (ixemul_dev_path)))
return readdevice (name + strlen (ixemul_dev_path), dest);
if (!strnicmp (name, amiga_dev_path, strlen (amiga_dev_path)))
return readdevice (name + strlen (amiga_dev_path), dest);
#endif
return 0;
}
/*
* fopen() for a compressed file
*/
FILE *zfile_open(const char *name, const char *mode)
{
struct zfile *l;
int fd = 0;
if(! uncompress (name, NULL))
return fopen (name, mode);
l = malloc (sizeof *l);
if (!l)
return NULL;
tmpnam(l->name);
/* On the amiga this would make ixemul loose the break handler */
/* ==> fixed in exmul v4.6 */
fd = creat(l->name, 0666);
if (fd < 0)
return NULL;
if (!uncompress (name, l->name)) {
free(l);
close (fd);
unlink(l->name);
return NULL;
}
l->f = uae_fopen_del (l->name, mode);
close (fd);
if (l->f == NULL) {
free(l);
return NULL;
}
l->next = zlist;
zlist = l;
return l->f;
}
#else
/*
* Stubs for machines that this doesn't work on.
*/
void zfile_exit(void)
{
}
int zfile_close(FILE *f)
{
return fclose(f);
}
FILE *zfile_open(const char *name, const char *mode)
{
return fopen(name, mode);
}
#endif