Dugo: Add patch for windows

2020-06-27T18:09:17Z

Add patch for windows

Neozeed: update gzcompat to version 5.2

2019-07-16T02:16:43Z

update gzcompat to version 5.2

Show changes

Neozeed at 22:10, 16 July 2011

2011-07-16T22:10:46Z

Neozeed at 19:27, 7 February 2009

2009-02-07T19:27:15Z

Neozeed: New page: gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed. == sou...

2009-02-06T21:56:52Z

New page: gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed. == sou...

New page

gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed.

== source code ==

<pre>
#ifndef lint
static char sccsid[] = "@(#)gzcompat.c 5.1 (Berkeley) 1/21/99";
#endif

/* gzcompat converts between compress -s and gzip formats. */

#include <stdio.h>

char magic_strong[2] = {037, 0241};
char magic_gzip[2] = {037, 0213};

struct gzheader {
unsigned char cm;
unsigned char flg;
unsigned char mtime[4];
unsigned char xfl;
unsigned char os;
} gzheader;

#define CM_DEFLATE 0x08

#define FTEXT 0x01
#define FHCRC 0x02
#define FEXTRA 0x04
#define FNAME 0x08
#define FCOMMENT 0x10
#define FRSVD 0xE0

#define OS_UNIX 0x03

int main()
{
char buf[4096];
int len;
int mkgzip;

/* First read the input magic number. */
len = fread(buf, 1, 2, stdin);
if (len < 0) {
perror("stdin");
return 1;
}
if (len != 2) {
fprintf(stderr, "stdin: not in compress -s or gzip format\n");
return 1;
}
if (buf[0] == magic_strong[0] && buf[1] == magic_strong[1])
mkgzip = 1;
else if (buf[0] == magic_gzip[0] && buf[1] == magic_gzip[1])
mkgzip = 0;
else {
fprintf(stderr, "stdin: not in compress -s or gzip format\n");
return 1;
}

/* Now read and check the gzip header if necessary. */
if (!mkgzip) {
len = fread(&gzheader, sizeof(struct gzheader), 1, stdin);
if (len < 0) {
perror("stdin");
return 1;
}
if (len != 1) {
fprintf(stderr, "stdin: invalid gzip header\n");
return 1;
}
if (gzheader.cm != CM_DEFLATE || gzheader.flg & FRSVD) {
fprintf(stderr, "stdin: invalid gzip header\n");
return 1;
}
if (gzheader.flg & FEXTRA) {
int count;

count = getchar();
if (ferror(stdin)) {
perror("stdin");
return 1;
}
if (feof(stdin)) {
fprintf(stderr, "stdin: invalid gzip header\n");

return 1;
}
while (count) {
getchar();
if (ferror(stdin)) {
perror("stdin");
return 1;
}
if (feof(stdin)) {
fprintf(stderr, "stdin: invalid gzip header\n");
return 1;
}
count--;
}
}
if (gzheader.flg & FNAME) {
int ch;

do {
ch = getchar();
if (ferror(stdin)) {
perror("stdin");
return 1;
}
if (feof(stdin)) {
fprintf(stderr, "stdin: invalid gzip header\n");
return 1;
}
}
while (ch);
}
if (gzheader.flg & FCOMMENT) {
int ch;

do {
ch = getchar();
if (ferror(stdin)) {
perror("stdin");
return 1;
}
if (feof(stdin)) {
fprintf(stderr, "stdin: invalid gzip header\n");
return 1;
}
}
while (ch);
}
if (gzheader.flg & FHCRC) {
len = fread(buf, 1, 2, stdin);
if (len < 0) {
perror("stdin");
return 1;
}
if (len != 2) {
fprintf(stderr, "stdin: invalid gzip header\n");

return 1;
}
}
}

/* Now write the output magic number. */
if (mkgzip) {
if (fwrite(magic_gzip, 1, 2, stdout) != 2) {
perror("stdout");
return 1;
}
}
else {
if (fwrite(magic_strong, 1, 2, stdout) != 2) {
perror("stdout");
return 1;
}
}

/* Now write the gzip header if necessary. */
if (mkgzip) {
gzheader.cm = CM_DEFLATE;
gzheader.flg = 0;
gzheader.mtime[0] = 0;
gzheader.mtime[1] = 0;
gzheader.mtime[2] = 0;
gzheader.mtime[3] = 0;
gzheader.xfl = 0;
gzheader.os = OS_UNIX;
if (fwrite(&gzheader, sizeof(struct gzheader), 1, stdout) != 1)
{
perror("stdout");
return 1;
}
}

/* Now actually copy the data! */
for (;;) {
len = fread(buf, 1, sizeof(buf), stdin);
if (len < 0) {
perror("stdin");
return 1;
}
if (len == 0)
break;
if (fwrite(buf, 1, len, stdout) != len) {
perror("stdout");
return 1;
}
}

/* I can't believe we're done! */
return 0;
}
</pre>

← Older revision		Revision as of 18:09, 27 June 2020
Line 218:		Line 218:
	</pre>		</pre>

		+	== patch for building/running on windows ==
		+
		+	<pre>
		+	7a8,12
		+	> #include <stdlib.h>
		+	> #ifdef _WIN32
		+	> #include <io.h>
		+	> #include <fcntl.h>
		+	> #endif
		+	31a37
		+	> int argc;
		+	39c45,48
		+	<
		+	---
		+	> #ifdef _WIN32
		+	> setmode(fileno(stdout),O_BINARY);
		+	> setmode(fileno(stdin),O_BINARY);
		+	> #endif
		+	</pre>

	[[Category:Compression Software]]		[[Category:Compression Software]]

← Older revision		Revision as of 22:10, 16 July 2011
Line 196:		Line 196:
	}		}
	</pre>		</pre>
		+
		+
		+	[[Category:Compression Software]]

← Older revision		Revision as of 19:27, 7 February 2009
Line 1:		Line 1:
−	gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed.	+	gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed. This is for the [[4.3 BSD]] Quasijarus Operating System.

	== source code ==		== source code ==

Gzcompat - Revision history

Dugo: Add patch for windows

Neozeed: update gzcompat to version 5.2

Neozeed at 22:10, 16 July 2011

Neozeed at 19:27, 7 February 2009

Neozeed: New page: gzcompat is a utility to convert from Sokolov compression into gzip. The primary use is to convert the Quasijarus install files into gzip, so that they can easily be decompressed. == sou...