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Merge pull request #30 from jforberg/dev

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Add `unzstd` program for decompression.
This commit is contained in:
Yann Collet
2015-07-05 15:02:41 -07:00
parent b5e06dc7c3 273d049a7c
commit effbd9811b
3 changed files with 51 additions and 0 deletions
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4
programs/Makefile
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@ -99,16 +99,20 @@ install: zstd
@install -d -m 755 $(DESTDIR)$(BINDIR)/ $(DESTDIR)$(MANDIR)/
@install -m 755 zstd$(EXT) $(DESTDIR)$(BINDIR)/zstd$(EXT)
@ln -sf zstd$(EXT) $(DESTDIR)$(BINDIR)/zstdcat
@ln -sf zstd$(EXT) $(DESTDIR)$(BINDIR)/unzstd
@echo Installing man pages
@install -m 644 zstd.1 $(DESTDIR)$(MANDIR)/zstd.1
@install -m 644 zstdcat.1 $(DESTDIR)$(MANDIR)/zstdcat.1
@install -m 644 unzstd.1 $(DESTDIR)$(MANDIR)/unzstd.1
@echo zstd installation completed
uninstall:
rm -f $(DESTDIR)$(BINDIR)/zstdcat
rm -f $(DESTDIR)$(BINDIR)/unzstd
[ -x $(DESTDIR)$(BINDIR)/zstd$(EXT) ] && rm -f $(DESTDIR)$(BINDIR)/zstd$(EXT)
[ -f $(DESTDIR)$(MANDIR)/zstd.1 ] && rm -f $(DESTDIR)$(MANDIR)/zstd.1
[ -f $(DESTDIR)$(MANDIR)/zstdcat.1 ] && rm -f $(DESTDIR)$(MANDIR)/zstdcat.1
[ -f $(DESTDIR)$(MANDIR)/unzstd.1 ] && rm -f $(DESTDIR)$(MANDIR)/unzstd.1
@echo zstd programs successfully uninstalled
test: test-zstd test-fullbench test-fuzzer test-mem

31
programs/unzstd.1 Normal file
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@ -0,0 +1,31 @@
\"
\" unzstd.1: This is a manual page for 'unzstd' program. This file is part of
\" the zstd <https://github.com/Cyan4973/zstd/> project.
\"
\" No hyphenation
.hy 0
.nr HY 0
.TH unzstd "1" "2014-06-20" "unzstd" "User Commands"
.SH NAME
\fBunzstd\fR - Utility based on zstd
.SH SYNOPSIS
.TP 5
\fBunzstd\fR [\fBOPTIONS\fR] [-|INPUT-FILE]
.SH DESCRIPTION
.PP
\fBunzstd\fR is an utility based on \fBzstd\fR, a fast lossless compression algorithm.
\fBunzstd\fR decompress input file, it is equivalent to \fBzstd -d\fR,
Available options are the same as \fBzstd\fR ones (man zstd).
.SH BUGS
Report bugs at:- https://github.com/Cyan4973/zstd/
.SH AUTHOR
Yann Collet

16
programs/zstdcli.c
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@ -76,6 +76,7 @@
#define WELCOME_MESSAGE "*** %s %i-bits %s, by %s (%s) ***\n", COMPRESSOR_NAME, (int)(sizeof(void*)*8), ZSTD_VERSION, AUTHOR, __DATE__
#define ZSTD_EXTENSION ".zst"
#define ZSTD_CAT "zstdcat"
#define ZSTD_UNZSTD "unzstd"
#define KB *(1 <<10)
#define MB *(1 <<20)
@ -172,9 +173,24 @@ int main(int argc, char** argv)
char* dynNameSpace = NULL;
char extension[] = ZSTD_EXTENSION;
/* Pick out basename component. Don't rely on stdlib because of conflicting behaviour. */
for (i = strlen(programName); i > 0; i--)
{
if (programName[i] == '/')
{
i++;
break;
}
}
programName += i;
/* zstdcat behavior */
if (!strcmp(programName, ZSTD_CAT)) { decode=1; forceStdout=1; displayLevel=1; outFileName=stdoutmark; }
/* unzstd behavior */
if (!strcmp(programName, ZSTD_UNZSTD))
decode=1;
// command switches
for(i=1; i<argc; i++)
{