libzio-0.99/000075500000000000000000000000001126000673500127415ustar00rootroot00000000000000libzio-0.99/COPYING000064400000000000000000000431271126000673500140030ustar00rootroot00000000000000 GNU GENERAL PUBLIC LICENSE Version 2, June 1991 Copyright (C) 1989, 1991 Free Software Foundation, Inc. 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Everyone is permitted to copy and distribute verbatim copies of this license document, but changing it is not allowed. Preamble The licenses for most software are designed to take away your freedom to share and change it. By contrast, the GNU General Public License is intended to guarantee your freedom to share and change free software--to make sure the software is free for all its users. This General Public License applies to most of the Free Software Foundation's software and to any other program whose authors commit to using it. (Some other Free Software Foundation software is covered by the GNU Library General Public License instead.) You can apply it to your programs, too. When we speak of free software, we are referring to freedom, not price. Our General Public Licenses are designed to make sure that you have the freedom to distribute copies of free software (and charge for this service if you wish), that you receive source code or can get it if you want it, that you can change the software or use pieces of it in new free programs; and that you know you can do these things. To protect your rights, we need to make restrictions that forbid anyone to deny you these rights or to ask you to surrender the rights. These restrictions translate to certain responsibilities for you if you distribute copies of the software, or if you modify it. For example, if you distribute copies of such a program, whether gratis or for a fee, you must give the recipients all the rights that you have. You must make sure that they, too, receive or can get the source code. And you must show them these terms so they know their rights. We protect your rights with two steps: (1) copyright the software, and (2) offer you this license which gives you legal permission to copy, distribute and/or modify the software. Also, for each author's protection and ours, we want to make certain that everyone understands that there is no warranty for this free software. If the software is modified by someone else and passed on, we want its recipients to know that what they have is not the original, so that any problems introduced by others will not reflect on the original authors' reputations. Finally, any free program is threatened constantly by software patents. We wish to avoid the danger that redistributors of a free program will individually obtain patent licenses, in effect making the program proprietary. To prevent this, we have made it clear that any patent must be licensed for everyone's free use or not licensed at all. The precise terms and conditions for copying, distribution and modification follow. GNU GENERAL PUBLIC LICENSE TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION 0. This License applies to any program or other work which contains a notice placed by the copyright holder saying it may be distributed under the terms of this General Public License. The "Program", below, refers to any such program or work, and a "work based on the Program" means either the Program or any derivative work under copyright law: that is to say, a work containing the Program or a portion of it, either verbatim or with modifications and/or translated into another language. (Hereinafter, translation is included without limitation in the term "modification".) Each licensee is addressed as "you". Activities other than copying, distribution and modification are not covered by this License; they are outside its scope. The act of running the Program is not restricted, and the output from the Program is covered only if its contents constitute a work based on the Program (independent of having been made by running the Program). Whether that is true depends on what the Program does. 1. You may copy and distribute verbatim copies of the Program's source code as you receive it, in any medium, provided that you conspicuously and appropriately publish on each copy an appropriate copyright notice and disclaimer of warranty; keep intact all the notices that refer to this License and to the absence of any warranty; and give any other recipients of the Program a copy of this License along with the Program. You may charge a fee for the physical act of transferring a copy, and you may at your option offer warranty protection in exchange for a fee. 2. You may modify your copy or copies of the Program or any portion of it, thus forming a work based on the Program, and copy and distribute such modifications or work under the terms of Section 1 above, provided that you also meet all of these conditions: a) You must cause the modified files to carry prominent notices stating that you changed the files and the date of any change. b) You must cause any work that you distribute or publish, that in whole or in part contains or is derived from the Program or any part thereof, to be licensed as a whole at no charge to all third parties under the terms of this License. c) If the modified program normally reads commands interactively when run, you must cause it, when started running for such interactive use in the most ordinary way, to print or display an announcement including an appropriate copyright notice and a notice that there is no warranty (or else, saying that you provide a warranty) and that users may redistribute the program under these conditions, and telling the user how to view a copy of this License. (Exception: if the Program itself is interactive but does not normally print such an announcement, your work based on the Program is not required to print an announcement.) These requirements apply to the modified work as a whole. If identifiable sections of that work are not derived from the Program, and can be reasonably considered independent and separate works in themselves, then this License, and its terms, do not apply to those sections when you distribute them as separate works. But when you distribute the same sections as part of a whole which is a work based on the Program, the distribution of the whole must be on the terms of this License, whose permissions for other licensees extend to the entire whole, and thus to each and every part regardless of who wrote it. 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You may copy and distribute the Program (or a work based on it, under Section 2) in object code or executable form under the terms of Sections 1 and 2 above provided that you also do one of the following: a) Accompany it with the complete corresponding machine-readable source code, which must be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, b) Accompany it with a written offer, valid for at least three years, to give any third party, for a charge no more than your cost of physically performing source distribution, a complete machine-readable copy of the corresponding source code, to be distributed under the terms of Sections 1 and 2 above on a medium customarily used for software interchange; or, c) Accompany it with the information you received as to the offer to distribute corresponding source code. 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These actions are prohibited by law if you do not accept this License. Therefore, by modifying or distributing the Program (or any work based on the Program), you indicate your acceptance of this License to do so, and all its terms and conditions for copying, distributing or modifying the Program or works based on it. 6. Each time you redistribute the Program (or any work based on the Program), the recipient automatically receives a license from the original licensor to copy, distribute or modify the Program subject to these terms and conditions. You may not impose any further restrictions on the recipients' exercise of the rights granted herein. You are not responsible for enforcing compliance by third parties to this License. 7. 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If the distribution and/or use of the Program is restricted in certain countries either by patents or by copyrighted interfaces, the original copyright holder who places the Program under this License may add an explicit geographical distribution limitation excluding those countries, so that distribution is permitted only in or among countries not thus excluded. In such case, this License incorporates the limitation as if written in the body of this License. 9. The Free Software Foundation may publish revised and/or new versions of the General Public License from time to time. Such new versions will be similar in spirit to the present version, but may differ in detail to address new problems or concerns. Each version is given a distinguishing version number. If the Program specifies a version number of this License which applies to it and "any later version", you have the option of following the terms and conditions either of that version or of any later version published by the Free Software Foundation. If the Program does not specify a version number of this License, you may choose any version ever published by the Free Software Foundation. 10. If you wish to incorporate parts of the Program into other free programs whose distribution conditions are different, write to the author to ask for permission. For software which is copyrighted by the Free Software Foundation, write to the Free Software Foundation; we sometimes make exceptions for this. Our decision will be guided by the two goals of preserving the free status of all derivatives of our free software and of promoting the sharing and reuse of software generally. NO WARRANTY 11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. END OF TERMS AND CONDITIONS How to Apply These Terms to Your New Programs If you develop a new program, and you want it to be of the greatest possible use to the public, the best way to achieve this is to make it free software which everyone can redistribute and change under these terms. To do so, attach the following notices to the program. It is safest to attach them to the start of each source file to most effectively convey the exclusion of warranty; and each file should have at least the "copyright" line and a pointer to where the full notice is found. Copyright (C) 19yy This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Also add information on how to contact you by electronic and paper mail. If the program is interactive, make it output a short notice like this when it starts in an interactive mode: Gnomovision version 69, Copyright (C) 19yy name of author Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'. This is free software, and you are welcome to redistribute it under certain conditions; type `show c' for details. The hypothetical commands `show w' and `show c' should show the appropriate parts of the General Public License. Of course, the commands you use may be called something other than `show w' and `show c'; they could even be mouse-clicks or menu items--whatever suits your program. You should also get your employer (if you work as a programmer) or your school, if any, to sign a "copyright disclaimer" for the program, if necessary. Here is a sample; alter the names: Yoyodyne, Inc., hereby disclaims all copyright interest in the program `Gnomovision' (which makes passes at compilers) written by James Hacker. , 1 April 1989 Ty Coon, President of Vice This General Public License does not permit incorporating your program into proprietary programs. If your program is a subroutine library, you may consider it more useful to permit linking proprietary applications with the library. If this is what you want to do, use the GNU Library General Public License instead of this License. libzio-0.99/Makefile000064400000000000000000000066551126000673500144150ustar00rootroot00000000000000# # Makefile for compiling libzio # # Author: Werner Fink, # LARGE = $(shell getconf LFS_CFLAGS) CFLAGS = $(RPM_OPT_FLAGS) -pipe -Wall -D_GNU_SOURCE -D_REENTRANT $(LARGE) CC = gcc MAJOR = 0 MINOR = 99 VERSION = $(MAJOR).$(MINOR) SONAME = libzio.so.$(MAJOR) LDMAP = -Wl,--version-script=zio.map prefix = /usr libdir = $(prefix)/lib datadir = $(prefix)/share mandir = $(datadir)/man incdir = $(prefix)/include FILES = README \ COPYING \ Makefile \ zio.c \ zioP.h \ zio.h.in \ testt.c \ tests.c \ lzw.h \ unlzw.c \ zio.map \ fzopen.3.in ### Includes and Defines (add further entries here): cc-include = $(shell $(CC) $(INCLUDES) -include $(1) -S -o /dev/null -xc /dev/null > /dev/null 2>&1 && echo "-D$(2)") cc-library = $(shell echo 'int main () { return 0; }' |$(CC) -l$(1:lib%=%) -o /dev/null -xc - > /dev/null 2>&1 && echo yes) cc-function = $(shell echo 'extern void $(1)(void); int main () { $(1)(); return 0; }' |$(CC) -o /dev/null -xc - > /dev/null 2>&1 && echo "-D$(2)") CFLAGS += $(call cc-include,libio.h,HAVE_LIBIO_H) CFLAGS += $(call cc-function,fopencookie,HAVE_FOPENCOOKIE) CFLAGS += $(call cc-function,funopen,HAVE_FUNOPEN) CFLAGS += $(call cc-include,zlib.h,HAS_ZLIB_H) CFLAGS += $(call cc-include,bzlib.h,HAS_BZLIB_H) CFLAGS += $(call cc-include,lzmadec.h,HAS_LZMADEC_H) CFLAGS += $(call cc-include,lzma.h,HAS_LZMA_H) LIBS = -lz ifeq ($(call cc-library,libbz2),yes) LIBS += -lbz2 endif ifeq ($(call cc-library,liblzma),yes) LIBS += -llzma else ifeq ($(call cc-library,lzmadec),yes) LIBS += -llzmadec endif endif all: shared static noweak: CFLAGS += -DNO_WEAK noweak: LINK += $(LIBS) noweak: all shared: libzio.so.$(VERSION) zio.map static: libzio.a obj/zio.o: zio.c zioP.h zio.h test -d obj/ || mkdir obj/ $(CC) $(CFLAGS) -o $@ -c $< obs/zio.o: zio.c zioP.h zio.h test -d obs/ || mkdir obs/ $(CC) $(CFLAGS) -fPIC -o $@ -c $< obj/unlzw.o: unlzw.c lzw.h test -d obj/ || mkdir obj/ $(CC) $(CFLAGS) -funroll-loops -o $@ -c $< obs/unlzw.o: unlzw.c lzw.h test -d obs/ || mkdir obs/ $(CC) $(CFLAGS) -fPIC -o $@ -c $< libzio.a: obj/zio.o obj/unlzw.o ar -rv $@ $^ ranlib $@ libzio.so.$(VERSION): obs/zio.o obs/unlzw.o gcc -shared -Wl,-soname,$(SONAME),-stats $(LDMAP) -o $@ $^ $(LINK) zioP.h: /usr/include/bzlib.h /usr/include/zlib.h zio.h: zio.h.in /usr/include/stdio.h sed 's/@@VERSION@@/$(VERSION)/' < $< > $@ fzopen.3: fzopen.3.in sed 's/@@VERSION@@/$(VERSION)/' < $< > $@ unlzw.c: lzw.h install: install-shared install-static install-data install-shared: libzio.so.$(VERSION) mkdir -p $(DESTDIR)$(libdir) install -m 0755 libzio.so.$(VERSION) $(DESTDIR)$(libdir)/ ln -sf libzio.so.$(VERSION) $(DESTDIR)$(libdir)/libzio.so.$(MAJOR) ln -sf libzio.so.$(MAJOR) $(DESTDIR)$(libdir)/libzio.so install-static: libzio.a mkdir -p $(DESTDIR)$(libdir) install -m 0644 libzio.a $(DESTDIR)$(libdir)/ install-data: zio.h fzopen.3 mkdir -p $(DESTDIR)$(incdir) mkdir -p $(DESTDIR)$(mandir)/man3 install -m 0644 zio.h $(DESTDIR)$(incdir)/ install -m 0644 fzopen.3 $(DESTDIR)$(mandir)/man3/ clean: rm -f *.a *.so* testt tests zio.h rm -rf obj/ obs/ rm -f libzio-$(VERSION).tar.gz dest: clean mkdir libzio-$(VERSION) cp -p $(FILES) libzio-$(VERSION)/ tar czf libzio-$(VERSION).tar.gz libzio-$(VERSION)/ rm -rf libzio-$(VERSION)/ testt: testt.c libzio.a $(CC) $(CFLAGS) -o $@ $^ $(LIBS) tests: tests.c libzio.a $(CC) $(CFLAGS) -o $@ $^ $(LIBS) libzio-0.99/README000064400000000000000000000031771126000673500136310ustar00rootroot00000000000000 Wrapper for reading or writing gzip/bzip2 files =============================================== This small lib provides with the help of the fopencookie(3) interface of the glibc together with the zlib and libbzip2 an simple interface for reading or writing gzip/bzip2 files with streams. Beside handling gzip files and bzip2 files, the libzio provides support for reading ``.Z'' compressed files. By using the GNUC compiler weak facility one or both libraries, zlib or libbzip2, can be skipped at linkage time. To use this e.g. an #include and FILE * file = fzopen("myfile.gz", "r"); or int fd = open("myfile.gz", O_RDONLY); FILE * file = fdzopen(fd, "r", "g"); together with linking the resulting program with -lzio _and_ `-lz'. For bzip2 files clearly the libbz2 with `-lbz2' has to used at linkage time. The zlib and/or libbzip2 librares are required because the libzio is not linked with `-lz' nor with `-lbz2'. If the appropriate library functions of libz or libbz2 are not found the fzopen(3) function returns NULL and the errno is set to the value ENOSYS for not implemented. As the libbzip2 does not provide a function for seeking in a bzip2 file, any call of fseek(3) on the open stream will fail and set the errno to ESPIPE. For writing gzip/bzip2 files, fzopen(3) only supports the suffixes ``.z'' and ``.gz'' for gzipped files and ``.bz2'' for bzip2ed files. On reading first the appropriate suffixes are checked if not provided. If no file is found the magic byte sequence at the beginning of the file is checked to detect which type of compressing is used for the file. Happy (un)compressing, Werner Fink libzio-0.99/fzopen.3.in000064400000000000000000000154711126000673500147430ustar00rootroot00000000000000'\" t -*- coding: UTF-8 -*- .\" .\" Copyright 2004 Werner Fink, 2004 SuSE LINUX AG, Germany. .\" Copyright 2006 Werner Fink, 2006 SuSE Products GmbH, Germany. .\" Copyright 2008 Werner Fink, 2008 SuSE Products GmbH, Germany. .\" Copyright 2009 Werner Fink, 2009 SuSE Products GmbH, Germany. .\" .\" This program is free software; you can redistribute it and/or modify .\" it under the terms of the GNU General Public License as published by .\" the Free Software Foundation; either version 2 of the License, or .\" (at your option) any later version. .\" .TH fzopen 3 "Apr 20, 2006" "Version @@VERSION@@" " Linux Programmer's Manual" .UC 3 .OS SuSE Linux .SH NAME fzopen \- stream open functions on compressed files .br fdzopen \- stream open functions on compressed files .SH SYNOPSIS .\" .B #include .sp .BI "FILE *fzopen (const char *" path ", const char *" mode ); .br .BI "FILE *fdzopen (int " fildes ", const char *" mode ", const char *" what ); .SH DESCRIPTION The .B fzopen function opens the compressed file whose name is the string to by .I path and associates a stream with it. The .B fdopen function associates a stream for the existing files descriptor .I fildes for a compressed file. .PP The argument .I mode points to a string beginning with one of the following sequences (Additional characters may follow these sequences.): .TP .B r Open compressed text file for reading. The stream is positioned at the beginning of the file. .TP .B w Truncate file to zero length or create compressed text file for writing. The stream is positioned at the beginning of the file. .TP .BR w1 - 9 Just like above but provides also the compression level. .PP The argument .I what of the function .B fdzopen specifies the underlying compression method which should be used: .TP .BR g , z The file descriptor points to a gziped file. .TP .BR b The file descriptor points to a bzip2ed file. .TP .BR l The file descriptor points to a lzma2ed file. .TP .BR Z The file descriptor points to a file in LZW format. .PP Note that .B fzopen and .B fdzopen can only open a compressed text file for reading .B or writing, but .IR both , which means that the .B + is not possible. Nor can any compressed text file open for appending, which makes .B a not usable with .BR fzopen . .\" .SH NOTE The program using libzio with .B -lzio at linking time should also be linked with the appropriate library for accessing compressed text files. This is the libz with .B -lz for accessing gziped text files and/or with .B -lbz2 for accessing bzip2ed text files. .PP For writing gzip/bzip2 files, .B fzopen only supports the suffixes .IR .z " and ".gz for gzipped files and .I .bz2 for bzip2ed files. All supported formats can be found in the following table: .IP .TS H allbox; c l l l l l rb l l l l l. fread fwrite fseek suffix library gzip yes yes yes .gz -lz bzip2 yes yes yes .bz2 -lbz2 LZW yes no yes .Z builtin lzma yes yes(no) yes .lzma -llzma (-llzmadec) xz yes yes yes .xz -llzma .TE .PP .PP On reading first the appropriate suffixes are checked if not provided. If no file is found the magic byte sequence at the beginning of the file is checked to detect a gzip or bzip2 file. .PP .\" .SH CONFIGURATION With the help of .BR autoconf (1) or .BR autoreconf (1) and a few lines in the common file .B configure.in or .B configure.ac found in many source packages a programmer or maintainer can extend the automatic configuration to find the appropriate libraries together with the libzio: .PP .IP .nf AC_CHECK_HEADER(zio.h, [ AC_CHECK_LIB(zio, fzopen, [ AC_CHECK_LIB(zio, fdzopen, [LIBS="$LIBS -l$zio"; am_cv_libzio=yes]) ]) ]) if test "$am_cv_libzio" = yes; then am_cv_libzio=with AC_DEFINE(HAVE_ZIO, 1, [Define if you have libzio for opening compressed files.]) AC_CHECK_HEADER(zlib.h, [ for lib in z gz; do AC_CHECK_LIB($lib, gzopen, [ LIBS="$LIBS -l$lib" am_cv_libzio="$am_cv_libzio lib$lib" break ]) done ]) AC_CHECK_HEADER(bzlib.h, [ for lib in bz2 bzip2; do AC_CHECK_LIB($lib, BZ2_bzopen, [ LIBS="$LIBS -l$lib" am_cv_libzio="$am_cv_libzio lib$lib" break ]) done ]) AC_CHECK_HEADER(lzmadec.h, [ for lib in libzma lzmadec; do AC_CHECK_LIB($lib, lzmadec_open, [ LIBS="$LIBS -l$lib" am_cv_libzio="$am_cv_libzio lib$lib" break ]) done ]) AC_MSG_NOTICE([libzio is used [$]am_cv_libzio]) fi .fi .PP combined with two lines in the common file .B config.h.in like .PP .RS 1c .nf /* Define to 1 if you have libzio for opening compressed files */ #undef HAVE_ZIO .fi .RE .PP (automatically added by .BR autoreconf (1)) it is easy to use the .BR cpp (1) macro .I HAVE_ZIO for the usage of .B fzopen instead of .BR fopen (3). .PP .\" .SH RETURN VALUES Upon successful completion .B fzopen return a .B FILE pointer. Otherwise, .B NULL is returned and the global variable errno is set to indicate the error. .\" .SH ERRORS .TP .B EINVAL The .I mode provided to .B fzopen was invalid. .TP .B ENOSYS The program using .B fzopen is not linked with the appropriate library .RB ( -lz for gziped files and .B -lbz2 for bzip2ed files.) .TP .B ENOTSUP The program using .B fzopen has specified a wrong mode for a .B .bz2 files or has opened a .B .Z file for writing. .TP .B ENOMEM The call of the library functions of the .B libz or .B libbz2 fails due failed memory allocation. .TP .B ESPIPE This happens if .BR fseek (3) is used in the case of seesking files is not supported. .\" .SH WARNINGS The functions .BR fileno (3) or .BR freopen (3) may not be applied on streams opened by .BR fzopen . An further explanation will be found in section .BR BUGS . .\" .SH BUGS .B Fzopen can not seek within .I bzip2 files due to the fact that the .B libbz2 does not provide a function like .I libz does with .BR gzseek . .B .Z compressed file will be opened by .B fzopen and .B fzdopen only for reading. Also a seek is not possible for .B .Z files. .B .lzma compressed file will be opened by .B fzopen and .B fzdopen only for reading as the liblzmadec only supports reading. As the .B fzopen and .B fdzopen are custom-made streams created with the help of .BR fopencookie (3) function of the .B glibc or .BR funopen (3) known from BSD Systems it is not possible to use the file descriptor with e.g. .BR fileno (3) in combination with system calls like .BR read (2) as this will evade the underlying read/write functions of the e.g. .BR libz . .SH FILES .\" .BR /usr/include/zio.h .SH SEE ALSO .BR fopen (3), .br .BR fopencookie (3) .br .BR funopen (3) .br .BR gzip (1), .br .BR bzip2 (1), .br .BR lzma (1), .br .BR xz (1), .br .BR /usr/include/zlib.h , .br .BR /usr/include/bzlib.h . .br .BR /usr/include/lzma.h . .br .BR /usr/include/lzmadec.h . .SH COPYRIGHT 2004 Werner Fink, 2004 SuSE LINUX AG Nuernberg, Germany. .br 2006,2008,2009 Werner Fink, 2006,2008,2009 SuSE Products GmbH, Germany. .SH AUTHOR Werner Fink libzio-0.99/lzw.h000064400000000000000000000071541126000673500137350ustar00rootroot00000000000000/* lzw.h -- define the lzw functions. Copyright (C) 1992-1993 Jean-loup Gailly. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef BITS # define BITS 16 #endif #define INIT_BITS 9 /* Initial number of bits per code */ #define LZW_MAGIC "\037\235" /* Magic header for lzw files, 1F 9D */ #define BIT_MASK 0x1f /* Mask for 'number of compression bits' */ /* Mask 0x20 is reserved to mean a fourth header byte, and 0x40 is free. * It's a pity that old uncompress does not check bit 0x20. That makes * extension of the format actually undesirable because old compress * would just crash on the new format instead of giving a meaningful * error message. It does check the number of bits, but it's more * helpful to say "unsupported format, get a new version" than * "can only handle 16 bits". */ #define BLOCK_MODE 0x80 /* Block compression: if table is full and compression rate is dropping, * clear the dictionary. */ #define LZW_RESERVED 0x60 /* reserved bits */ #define CLEAR 256 /* flush the dictionary */ #define FIRST (CLEAR+1) /* first free entry */ #include #include #include "zioP.h" #if defined _REENTRANT || defined _THREAD_SAFE # include weak_symbol(pthread_sigmask); #endif __extension__ static __inline__ int sigucmask(int how, const sigset_t * __restrict set, sigset_t * __restrict oset) { #if defined _REENTRANT || defined _THREAD_SAFE if (&pthread_sigmask) return pthread_sigmask(how, set, oset); else #endif return sigprocmask(how, set, oset); } #if defined(__ia64__) && defined(uc_sigmask) /* Broken header sys/ucontext.h -> bits/sigcontext.h */ __extension__ static __inline__ unsigned long int sig_ia64_mask(const sigset_t set) { unsigned long int mask = 0; int cnt = (8 * sizeof(unsigned long int)); if (cnt > NSIG) cnt = NSIG; while (--cnt >= 0) { if (!sigismember(&set, cnt)) continue; mask |= (1 << (cnt - 1)); /* sigmask() macro is is not usable for BSD way */ } return mask; } #endif typedef struct _LZW_s { uint8_t *inbuf; uint8_t *outbuf; uint16_t *d_buf; uint8_t *tab_suffix; uint16_t *tab_prefix; uint8_t *transfer; off_t bytes_in; off_t bytes_out; size_t insize; size_t inptr; size_t outpos; size_t tcount; ssize_t tsize; ssize_t rsize; struct unlzw_s { uint8_t *stackp; int32_t code; int finchar; int32_t oldcode; int32_t incode; uint32_t inbits; uint32_t posbits; uint32_t bitmask; int32_t free_ent; int32_t maxcode; int32_t maxmaxcode; off_t newdif; int n_bits; int block_mode; int maxbits; } n; int ifd; char *ifname; ucontext_t *uc; uint8_t *stack; } LZW_t; extern LZW_t *openlzw(const char * __restrict, const char * __restrict); extern LZW_t *dopenlzw(int fildes, const char * __restrict); extern ssize_t readlzw(LZW_t * __restrict, char * __restrict, const size_t); extern void closelzw(LZW_t * __restrict); libzio-0.99/tests.c000064400000000000000000000010501126000673500142430ustar00rootroot00000000000000#include #include #include #include #include "zio.h" int main(int argc, char *argv[]) { FILE *file; char line[1024]; size_t len; if (!(file = fdzopen(fileno(stdin), "r", argc > 1 ? argv[1] : "g"))) { fprintf(stderr, "%s\n", strerror(errno)); return 1; } while ((len = fread(line, sizeof(char), sizeof (line), file))) { size_t ret = fwrite(line, sizeof(char), len, stdout); if ((ret != len) && ferror(stdout)) { clearerr(stdout); } } fclose(file); return 0; } libzio-0.99/testt.c000064400000000000000000000010561126000673500142520ustar00rootroot00000000000000#include #include #include #include #include "zio.h" int main(int argc, char *argv[]) { while (argc > 1) { FILE *file; char line[1024]; size_t len; argv++; argc--; if (!(file = fzopen(*argv, "r"))) { fprintf(stderr, "%s\n", strerror(errno)); continue; } while ((len = fread(line, sizeof(char), sizeof (line), file))) { size_t ret = fwrite(line, sizeof(char), len, stdout); if ((ret != len) && ferror(stdout)) { clearerr(stdout); } } fclose(file); } return 0; } libzio-0.99/unlzw.c000064400000000000000000000315341126000673500142720ustar00rootroot00000000000000/* unlzw.c -- decompress files in LZW format. * The code in this file is directly derived from the public domain 'compress' * written by Spencer Thomas, Joe Orost, James Woods, Jim McKie, Steve Davies, * Ken Turkowski, Dave Mack and Peter Jannesen. * * This is a temporary version which will be rewritten in some future version * to accommodate in-memory decompression. * * Tue Dec 12 17:54:07 CET 2006 - werner@suse.de * Be able to emulate a zlib-like behaviour: open, read, and close .Z files * in memory. I'm using context switchting and a global allocated structure * to be able to read during the main loop in unlzw() does its work. For this * nearly _all_ variables affected by the context switch are forward to this * structure, even the stack and the context type its self. * The oringal source was adopted from the gzip version 1.3.7. */ #include #include #include #include #include #include #include #define DIST_BUFSIZE 0x2000 #define INBUFSIZ 0x2000 #define WSIZE 0x2000 #define INBUF_EXTRA 0x40 #define OUTBUFSIZ 0x2000 #define OUTBUF_EXTRA 0x800 #define STACK_SIZE 0x1000 #include "lzw.h" static void unlzw(LZW_t *in); /* =========================================================================== * Fill the input buffer. This is called only when the buffer is empty. * Adopted from gzip version 1.3.7 util.c */ __extension__ static __inline__ int fill_inbuf(LZW_t *in) { /* Read as much as possible */ in->insize = 0; do { ssize_t len = read(in->ifd, in->inbuf + in->insize, INBUFSIZ - in->insize); if (len < 0) { if (errno == EINTR) continue; perror(__FUNCTION__); break; } if (len == 0) break; in->insize += len; } while (in->insize < INBUFSIZ); if (in->insize == 0) return EOF; in->bytes_in += (off_t)in->insize; in->inptr = 1; return (in->inbuf)[0]; } /* =========================================================================== * Does the same as write(), but also handles partial pipe writes and checks * for error return. * Adopted from gzip version 1.3.7 util.c * Note that this version uses context switching, switch back to old context. */ __extension__ static __inline__ void write_buf(LZW_t *in, const unsigned char* buf, size_t cnt) { do { if ((in->tsize = (in->tcount > cnt) ? cnt : in->tcount)) { (void)memcpy(in->transfer, buf, in->tsize); buf += in->tsize; cnt -= in->tsize; } swapcontext(&in->uc[1], &in->uc[0]); } while (cnt); } #define get_byte(in) ((in)->inptr < (in)->insize ? (in)->inbuf[(in)->inptr++] : fill_inbuf((in))) #define memzero(s,n) memset ((void*)(s), 0, (n)) #define MAXCODE(n) (1L << (n)) #ifndef BYTEORDER # define BYTEORDER 0000 #endif #ifndef NOALLIGN # define NOALLIGN 0 #endif union bytes { long word; struct { #if BYTEORDER == 4321 uint8_t b1; uint8_t b2; uint8_t b3; uint8_t b4; #else #if BYTEORDER == 1234 uint8_t b4; uint8_t b3; uint8_t b2; uint8_t b1; #else # undef BYTEORDER int dummy; #endif #endif } bytes; }; #if BYTEORDER == 4321 && NOALLIGN == 1 # define input(b,o,c,n,m){ \ (c) = (*(uint32_t *)(&(b)[(o)>>3])>>((o)&0x7))&(m); \ (o) += (n); \ } #else # define input(b,o,c,n,m){ \ uint8_t *p = &(b)[(o)>>3]; \ (c) = ((((long)(p[0]))|((long)(p[1])<<8)| \ ((long)(p[2])<<16))>>((o)&0x7))&(m); \ (o) += (n); \ } #endif #define tab_prefixof(i) in->tab_prefix[i] #define clear_tab_prefixof(in) memzero((in)->tab_prefix, sizeof(unsigned short)*(1<<(BITS))); #define de_stack ((uint8_t *)(&in->d_buf[DIST_BUFSIZE-1])) #define tab_suffixof(i) in->tab_suffix[i] /* ============================================================================ * Decompress in to out. This routine adapts to the codes in the * file building the "string" table on-the-fly; requiring no table to * be stored in the compressed file. * IN assertions: the buffer inbuf contains already the beginning of * the compressed data, from offsets iptr to insize-1 included. * The magic header has already been checked and skipped. * bytes_in and bytes_out have been initialized. * * Adopted from gzip version 1.3.7 unlzw.c * This is mainly the head of the old unlzw() before its main loop. */ LZW_t *openlzw(const char * path, const char *mode) { int fildes; if (!mode || *mode != 'r') goto out; if ((fildes = open(path, O_RDONLY)) < 0) goto out; return dopenlzw(fildes, mode); out: return (LZW_t*)0; } LZW_t *dopenlzw(int fildes, const char *mode) { LZW_t *in = (LZW_t*)0; uint8_t magic[2]; sigset_t sigmask, oldmask; if (!mode || *mode != 'r') goto out; if ((in = (LZW_t*)malloc(sizeof(LZW_t))) == (LZW_t*)0) goto err; memset(in, 0, sizeof(LZW_t)); if ((in->inbuf = (uint8_t*)malloc(sizeof(uint8_t)*(INBUFSIZ))) == (uint8_t*)0) goto err; if ((in->outbuf = (uint8_t*)malloc(sizeof(uint8_t)*(OUTBUFSIZ+OUTBUF_EXTRA))) == (uint8_t*)0) goto err; if ((in->d_buf = (uint16_t*)malloc(sizeof(uint16_t)*DIST_BUFSIZE)) == (uint16_t*)0) goto err; if ((in->tab_suffix = (uint8_t*) malloc(sizeof(uint8_t )*(2L*WSIZE))) == (uint8_t*)0) goto err; if ((in->tab_prefix = (uint16_t*)malloc(sizeof(uint16_t)*(1<<(BITS)))) == (uint16_t*)0) goto err; if ((in->ifd = fildes) < 0) goto err; if ((in->stack = (uint8_t*)malloc(STACK_SIZE)) == (uint8_t*)0) goto err; if ((in->uc = (ucontext_t*)malloc(2*sizeof(ucontext_t))) == (ucontext_t*)0) goto err; if (getcontext(&in->uc[1]) < 0) goto err; in->uc[1].uc_link = &in->uc[0]; in->uc[1].uc_stack.ss_sp = in->stack; in->uc[1].uc_stack.ss_size = STACK_SIZE; if (sigucmask(SIG_SETMASK, (sigset_t*)0, &sigmask) < 0) goto err; if (sigaddset(&sigmask, SIGINT) < 0) goto err; if (sigaddset(&sigmask, SIGQUIT) < 0) goto err; #if defined(__ia64__) && defined(uc_sigmask) /* On ia64 the type of uc_sigmask is ulong not sigset_t */ in->uc[1].uc_sigmask = sig_ia64_mask(sigmask); #else in->uc[1].uc_sigmask = sigmask; #endif makecontext(&in->uc[1], (void(*)(void))unlzw, 1, in); sigucmask(SIG_SETMASK, &sigmask, &oldmask); magic[0] = get_byte(in); magic[1] = get_byte(in); sigucmask(SIG_SETMASK, &oldmask, &sigmask); if (memcmp(magic, LZW_MAGIC, sizeof(magic))) goto err; in->n.block_mode = BLOCK_MODE; /* block compress mode -C compatible with 2.0 */ in->rsize = in->insize; in->n.maxbits = get_byte(in); in->n.block_mode = in->n.maxbits & BLOCK_MODE; if ((in->n.maxbits & LZW_RESERVED) != 0) { fprintf(stderr, "%s: warning, unknown flags 0x%x\n", __FUNCTION__, in->n.maxbits & LZW_RESERVED); } in->n.maxbits &= BIT_MASK; in->n.maxmaxcode = MAXCODE(in->n.maxbits); if (in->n.maxbits > BITS) { fprintf(stderr, "%s: compressed with %d bits, can only handle %d bits\n", __FUNCTION__, in->n.maxbits, BITS); goto err; } in->n.maxcode = MAXCODE(in->n.n_bits = INIT_BITS)-1; in->n.bitmask = (1<n.n_bits)-1; in->n.oldcode = -1; in->n.finchar = 0; in->n.posbits = in->inptr<<3; in->n.free_ent = ((in->n.block_mode) ? FIRST : 256); clear_tab_prefixof(in); /* Initialize the first 256 entries in the table. */ for (in->n.code = 255 ; in->n.code >= 0 ; --in->n.code) { tab_suffixof(in->n.code) = (uint8_t)in->n.code; } out: return in; err: closelzw(in); return (LZW_t*)0; } /* * New function, simply to free all allocated objects in * reverse order and close the input file. */ void closelzw(LZW_t * in) { if (in == (LZW_t*)0) return; if (in->uc) free(in->uc); if (in->stack) free(in->stack); if (in->ifd >= 0) close(in->ifd); if (in->tab_prefix) free(in->tab_prefix); if (in->tab_suffix) free(in->tab_suffix); if (in->d_buf) free(in->d_buf); if (in->outbuf) free(in->outbuf); if (in->inbuf) free(in->inbuf); free(in); in = (LZW_t*)0; } /* * Adopted from gzip version 1.3.7 unlzw.c * This is mainly the body of the old unlzw() which is its main loop. */ static void unlzw(LZW_t *in) { do { int i; int e; int o; resetbuf: e = in->insize - (o = (in->n.posbits>>3)); for (i = 0 ; i < e ; ++i) { in->inbuf[i] = in->inbuf[i+o]; } in->insize = e; in->n.posbits = 0; if (in->insize < INBUF_EXTRA) { do { in->rsize = read(in->ifd, in->inbuf + in->insize, INBUFSIZ - in->insize); if (in->rsize < 0) { if (errno == EINTR) continue; perror(__FUNCTION__); break; } if (in->rsize == 0) break; in->insize += in->rsize; } while (in->insize < INBUFSIZ); in->bytes_in += (off_t)in->insize; } in->n.inbits = ((in->rsize != 0) ? ((long)in->insize - in->insize%in->n.n_bits)<<3 : ((long)in->insize<<3)-(in->n.n_bits-1)); while (in->n.inbits > in->n.posbits) { if (in->n.free_ent > in->n.maxcode) { in->n.posbits = ((in->n.posbits-1) + ((in->n.n_bits<<3)-(in->n.posbits-1+(in->n.n_bits<<3))%(in->n.n_bits<<3))); ++in->n.n_bits; if (in->n.n_bits == in->n.maxbits) { in->n.maxcode = in->n.maxmaxcode; } else { in->n.maxcode = MAXCODE(in->n.n_bits)-1; } in->n.bitmask = (1<n.n_bits)-1; goto resetbuf; } input(in->inbuf,in->n.posbits,in->n.code,in->n.n_bits,in->n.bitmask); if (in->n.oldcode == -1) { if (256 <= in->n.code) fprintf(stderr, "%s: corrupt input.\n", __FUNCTION__); in->outbuf[in->outpos++] = (uint8_t)(in->n.finchar = (int)(in->n.oldcode=in->n.code)); continue; } if (in->n.code == CLEAR && in->n.block_mode) { clear_tab_prefixof(in); in->n.free_ent = FIRST - 1; in->n.posbits = ((in->n.posbits-1) + ((in->n.n_bits<<3)-(in->n.posbits-1+(in->n.n_bits<<3))%(in->n.n_bits<<3))); in->n.maxcode = MAXCODE(in->n.n_bits = INIT_BITS)-1; in->n.bitmask = (1<n.n_bits)-1; goto resetbuf; } in->n.incode = in->n.code; in->n.stackp = de_stack; if (in->n.code >= in->n.free_ent) { /* Special case for KwKwK string. */ if (in->n.code > in->n.free_ent) { #ifdef DEBUG uint8_t *p; in->n.posbits -= in->n.n_bits; p = &in->inbuf[in->n.posbits>>3]; fprintf(stderr, "code:%ld free_ent:%ld n_bits:%d insize:%lu\n", in->n.code, in->n.free_ent, in->n.n_bits, in->insize); fprintf(stderr, "posbits:%ld inbuf:%02X %02X %02X %02X %02X\n", in->n.posbits, p[-1],p[0],p[1],p[2],p[3]); #endif if (in->outpos > 0) { write_buf(in, in->outbuf, in->outpos); in->bytes_out += (off_t)in->outpos; in->outpos = 0; } fprintf(stderr, "%s: corrupt input.\n", __FUNCTION__); } *--in->n.stackp = (uint8_t)in->n.finchar; in->n.code = in->n.oldcode; } /* Generate output characters in reverse order */ while ((uint32_t)in->n.code >= (uint32_t)256) { *--in->n.stackp = tab_suffixof(in->n.code); in->n.code = tab_prefixof(in->n.code); } *--in->n.stackp = (uint8_t)(in->n.finchar = tab_suffixof(in->n.code)); /* And put them out in forward order */ if (in->outpos + (in->n.newdif = (de_stack - in->n.stackp)) >= OUTBUFSIZ) { do { if (in->n.newdif > OUTBUFSIZ - in->outpos) in->n.newdif = OUTBUFSIZ - in->outpos; if (in->n.newdif > 0) { memcpy(in->outbuf + in->outpos, in->n.stackp, in->n.newdif); in->outpos += in->n.newdif; } if (in->outpos >= OUTBUFSIZ) { write_buf(in, in->outbuf, in->outpos); in->bytes_out += (off_t)in->outpos; in->outpos = 0; } in->n.stackp+= in->n.newdif; } while ((in->n.newdif = (de_stack - in->n.stackp)) > 0); } else { memcpy(in->outbuf + in->outpos, in->n.stackp, in->n.newdif); in->outpos += in->n.newdif; } if ((in->n.code = in->n.free_ent) < in->n.maxmaxcode) { /* Generate the new entry. */ tab_prefixof(in->n.code) = (uint16_t)in->n.oldcode; tab_suffixof(in->n.code) = (uint8_t)in->n.finchar; in->n.free_ent = in->n.code+1; } in->n.oldcode = in->n.incode; /* Remember previous code. */ } } while (in->rsize != 0); if (in->outpos > 0) { write_buf(in, in->outbuf, in->outpos); in->bytes_out += (off_t)in->outpos; in->tsize = EOF; in->outpos = 0; } } /* * New function, simply to read from the output buffer of unlzw(). * We do this by switching into the context of unlzw() and back * to our old context if the provided buffer is filled. */ ssize_t readlzw(LZW_t * in, char* buffer, const size_t size) { in->transfer = (uint8_t*)buffer; in->tcount = size; in->tsize = 0; if (in->uc == (ucontext_t*)0) return 0; /* For (f)lex scanner ... */ swapcontext(&in->uc[0], &in->uc[1]); if (in->tsize < 0) { free(in->uc); /* ... do not enter next */ in->uc = (ucontext_t*)0; free(in->stack); in->stack = (uint8_t*)0; return 0; } return in->tsize; } #ifdef TEST int main() { ssize_t len; char buffer[1024]; LZW_t *lzw = openlzw("man.1.Z", "r"); if (!lzw) return -1; do { len = readlzw(lzw, &buffer[0], sizeof(buffer)); write(1, &buffer[0], len); } while (len != 0); closelzw(lzw); return 0; } #endif libzio-0.99/zio.c000064400000000000000000000626701126000673500137210ustar00rootroot00000000000000/* * zio.c Provide an streamable interface to gziped/bzip2ed/LZW/LZMA files * * Copyright 2004 Werner Fink, 2004 SuSE LINUX AG, Germany. * Copyright 2006 Werner Fink, 2006 SuSE Products GmbH, Germany. * Copyright 2009 Werner Fink, 2009 SuSE Products GmbH, Germany. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Author: Werner Fink */ #include "zioP.h" #include "zio.h" #include "lzw.h" #if defined(HAS_ZLIB_H) static ssize_t zread(void *cookie, char *buf, size_t count) { if (!cookie) { errno = EINVAL; return -1; } return (ssize_t)gzread((gzFile)cookie, (voidp)buf, count); } static ssize_t zwrite(void *cookie, const char *buf, size_t count) { if (!cookie) { errno = EINVAL; return -1; } return (ssize_t)gzwrite((gzFile)cookie, (const voidp)buf, count); } static zio_int_t zseek(void *cookie, zio_off_t *poffset, int whence) { if (!cookie) { errno = EINVAL; return -1; } return (zio_int_t)gzseek((gzFile)cookie, (z_off_t)(*poffset), whence); } static int zclose(void *cookie) { int status; if (!cookie) { errno = EINVAL; return -1; } (void)gzflush((gzFile)cookie, Z_FINISH); status = gzclose((gzFile)cookie); return (status >= 0) ? 0 : EOF; } __extension__ static cookie_io_functions_t ioz = { .read = (cookie_read_function_t*) &zread, .write = (cookie_write_function_t*)&zwrite, .seek = (cookie_seek_function_t*) &zseek, .close = (cookie_close_function_t*)&zclose, }; #else /* !HAS_ZLIB_H */ # error No support for `.gz' nor `.z' format #endif /* !HAS_ZLIB_H */ #if defined(HAS_BZLIB_H) # ifndef MIN # define MIN(x,y) ((x) < (y) ? (x) : (y)) # endif typedef struct bzfile_s { size_t total_out; BZFILE *file; char *mode; char *path; int fd; } bzfile_t; static ssize_t bzread(void *cookie, char *buf, size_t count) { bzfile_t *bzf = (bzfile_t*)cookie; ssize_t len = -1; if (!bzf) goto out; if (bzf->file) len = (ssize_t)BZ2_bzread(bzf->file, (void*)buf, count); if (len > 0) bzf->total_out += len; out: if (len < 0) errno = EINVAL; return len; } static ssize_t bzwrite(void *cookie, const char *buf, size_t count) { bzfile_t *bzf = (bzfile_t*)cookie; ssize_t len = -1; if (!bzf) goto out; if (bzf->file) len = (ssize_t)BZ2_bzread(bzf->file, (void*)buf, count); if (len > 0) bzf->total_out += len; out: if (len < 0) errno = EINVAL; return len; } static zio_int_t bzseek(void *cookie, zio_off_t *poffset, int whence) { bzfile_t *bzf = (bzfile_t*)cookie; off_t offset = (off_t)*poffset; off_t oldpos, newpos; if (!bzf) { errno = EINVAL; return -1; } oldpos = (off_t)bzf->total_out; switch (whence) { case SEEK_SET: if (offset < 0) return -1; newpos = offset; break; case SEEK_CUR: if ((offset < 0 && (off_t)(-1 * offset) > oldpos) || (offset > 0 && (offset+oldpos) < oldpos)) return -1; newpos = (off_t)bzf->total_out + offset; break; case SEEK_END: newpos = -1; break; default: errno = EINVAL; return -1; } if (whence != SEEK_END && newpos < oldpos) { int status = BZ2_bzflush(bzf->file); BZ2_bzclose(bzf->file); if (status < 0) { errno = EINVAL; return -1; } if (bzf->fd >= 0) { lseek(bzf->fd, 0, SEEK_SET); bzf->file = BZ2_bzdopen(bzf->fd, bzf->mode); } else if (bzf->path) { bzf->file = BZ2_bzopen(bzf->path, bzf->mode); } else { errno = EINVAL; return -1; } if (bzf->file == (BZFILE*)0) { errno = EINVAL; return -1; } bzf->total_out = 0; } if (newpos == oldpos) return oldpos; else { char buf[1<<12]; while (newpos > oldpos || newpos == -1) { size_t req_size = MIN(sizeof(buf), newpos - oldpos); ssize_t got_size = BZ2_bzread(bzf->file, buf, req_size); if (got_size != (ssize_t)(req_size)) { if (got_size < 0) return -1; else { newpos = oldpos + got_size; break; } } oldpos += got_size; } return newpos; } } static int bzclose(void *cookie) { bzfile_t *bzf = (bzfile_t*)cookie; int status = -1; if (!bzf) { errno = EINVAL; goto out; } if (bzf->file) { status = BZ2_bzflush(bzf->file); BZ2_bzclose(bzf->file); } free(cookie); out: return (status >= 0) ? 0 : EOF; } __extension__ static cookie_io_functions_t iobz = { .read = (cookie_read_function_t*) &bzread, .write = (cookie_write_function_t*)&bzwrite, .seek = (cookie_seek_function_t*) &bzseek, .close = (cookie_close_function_t*)&bzclose, }; #else /* !HAS_BZLIB_H */ # warning No support for .bz2 format #endif /* !HAS_BZLIB_H */ #if defined(HAS_LZMA_H) # ifndef MIN # define MIN(x,y) ((x) < (y) ? (x) : (y)) # endif typedef struct lzfile_s { uint8_t buf[1<<12]; lzma_stream strm; FILE *file; int encoding; int level; int what; int eof; } lzfile_t; static lzma_ret lzmaopen(lzma_stream *__restrict strm, const char mode, const char what, int level) { lzma_ret ret; if (mode == 'w') { if (what == 'x') ret = lzma_easy_encoder(strm, level, LZMA_CHECK_CRC32); else { lzma_options_lzma opt; lzma_lzma_preset(&opt, level); ret = lzma_alone_encoder(strm, &opt); } } else ret = lzma_auto_decoder(strm, 100<<20, 0); return ret; } static ssize_t lzmaread(void *cookie, char *buf, size_t count) { lzfile_t *lzma = (lzfile_t*)cookie; lzma_stream *strm; ssize_t eof = 0; if (!lzma || lzma->encoding) return -1; if (lzma->eof) return 0; strm = &lzma->strm; strm->next_out = (uint8_t*)buf; strm->avail_out = count; while (1) { lzma_ret lret; if (!strm->avail_in) { strm->next_in = lzma->buf; strm->avail_in = fread(lzma->buf, 1, sizeof(lzma->buf), lzma->file); if (strm->avail_in == 0) eof = 1; } lret = lzma_code(strm, LZMA_RUN); if (lret == LZMA_STREAM_END) { lzma->eof = 1; return count - strm->avail_out; } if (lret != LZMA_OK) return -1; if (strm->avail_out == 0) return count; if (eof) { eof = feof(lzma->file); clearerr(lzma->file); if (eof) break; return -1; } } return 0; } static ssize_t lzmawrite(void *cookie, const char *buf, size_t count) { lzfile_t *lzma = (lzfile_t*)cookie; lzma_stream *strm; if (!lzma || !lzma->encoding) return -1; if (!count) return 0; strm = &lzma->strm; strm->next_in = (uint8_t*)buf; strm->avail_in = count; while (1) { lzma_ret lret; size_t len; strm->next_out = lzma->buf; strm->avail_out = sizeof(lzma->buf); lret = lzma_code(strm, LZMA_RUN); if (lret != LZMA_OK) break; len = sizeof(lzma->buf) - strm->avail_out; if (len && fwrite(lzma->buf, 1, len, lzma->file) != len) break; if (strm->avail_in == 0) return len; } return -1; } static zio_int_t lzmaseek(void *cookie, zio_off_t *poffset, int whence) { lzfile_t *lzma = (lzfile_t*)cookie; off_t offset = (off_t)*poffset; lzma_stream *strm; off_t oldpos, newpos; if (!lzma) return -1; strm = &lzma->strm; oldpos = (off_t)strm->total_out; switch (whence) { case SEEK_SET: if (offset < 0) return -1; newpos = offset; break; case SEEK_CUR: if ((offset < 0 && (off_t)(-1 * offset) > oldpos) || (offset > 0 && (offset+oldpos) < oldpos)) return -1; newpos = (off_t)strm->total_out + offset; break; case SEEK_END: newpos = -1; break; default: errno = EINVAL; return -1; } if (whence != SEEK_END && newpos < oldpos) { lzma_ret ret; lzma_end(strm); rewind(lzma->file); ret = lzmaopen(strm, lzma->encoding ? 'w' : 'r', lzma->what, lzma->level); if (ret != LZMA_OK || strm->total_out != 0) { fclose(lzma->file); errno = EINVAL; return -1; } } if (newpos == oldpos) return oldpos; else { char buf[sizeof(lzma->buf)]; while (newpos > oldpos || newpos == -1) { size_t req_size = MIN(sizeof(buf), newpos - oldpos); ssize_t got_size = lzmaread(cookie, buf, req_size); if (got_size != (ssize_t)(req_size)) { if (got_size < 0) return -1; else { newpos = oldpos + got_size; break; } } oldpos += got_size; } return newpos; } } static int lzmaclose(void *cookie) { lzfile_t *lzma = (lzfile_t*)cookie; lzma_ret lret = LZMA_STREAM_END; lzma_stream *strm; int fret = -1; if (!lzma) return -1; if (!lzma->encoding) goto out; strm = &lzma->strm; while (1) { size_t len; strm->avail_out = sizeof(lzma->buf); strm->next_out = (uint8_t*)lzma->buf; lret = lzma_code(strm, LZMA_FINISH); if (lret != LZMA_OK && lret != LZMA_STREAM_END) goto out; len = sizeof(lzma->buf) - strm->avail_out; if (len && fwrite(lzma->buf, 1, len, lzma->file) != len) goto out; if (lret == LZMA_STREAM_END) break; } lzma_end(strm); out: fret = fclose(lzma->file); free(lzma); if (lret != LZMA_STREAM_END) fret = -1; return fret; } __extension__ static cookie_io_functions_t iolzma = { .read = (cookie_read_function_t*) &lzmaread, .write = (cookie_write_function_t*)&lzmawrite, .seek = (cookie_seek_function_t*) &lzmaseek, .close = (cookie_close_function_t*)&lzmaclose, }; #else /* !HAS_LZMA_H */ # if defined(HAS_LZMADEC_H) static ssize_t lzmaread(void *cookie, char *buf, size_t count) { if (!cookie) { errno = EINVAL; return -1; } return lzmadec_read((lzmadec_FILE*)cookie, (uint8_t*)buf, count); } static ssize_t lzmawrite(void *cookie, const char *buf, size_t count) { errno = ENOTSUP; return -1; } static zio_int_t lzmaseek(void *cookie, zio_off_t *poffset, int whence) { if (!cookie) { errno = EINVAL; return -1; } return (zio_int_t)lzmadec_seek((lzmadec_FILE*)cookie, (off_t)(*poffset), whence); } static int lzmaclose(void *cookie) { if (!cookie) { errno = EINVAL; return -1; } int_fast8_t status = lzmadec_close((lzmadec_FILE*)cookie); return (status >= 0) ? 0 : EOF; } __extension__ static cookie_io_functions_t iolzma = { .read = (cookie_read_function_t*) &lzmaread, .write = (cookie_write_function_t*)&lzmawrite, .seek = (cookie_seek_function_t*) &lzmaseek, .close = (cookie_close_function_t*)&lzmaclose, }; # else /* !HAS_LZMADEC_H */ # warning No support for .lzma format # endif /* !HAS_LZMADEC_H */ #endif /* !HAS_LZMA_H */ typedef struct lzwfile_s { size_t total_out; LZW_t *file; char *mode; char *path; int fd; } lzwfile_t; static ssize_t lzwread(void *cookie, char *buf, size_t count) { lzwfile_t *lzw = (lzwfile_t*)cookie; ssize_t len = -1; if (!lzw) goto out; if (lzw->file) len = readlzw(lzw->file, buf, count); if (len > 0) lzw->total_out += len; out: if (len < 0) errno = EINVAL; return len; } static ssize_t lzwwrite(void *cookie, const char *buf, size_t count) { errno = ENOTSUP; return -1; } static zio_int_t lzwseek(void *cookie, zio_off_t *poffset, int whence) { lzwfile_t *lzw = (lzwfile_t*)cookie; off_t offset = (off_t)*poffset; off_t oldpos, newpos; if (!lzw) { errno = EINVAL; return -1; } oldpos = (off_t)lzw->total_out; switch (whence) { case SEEK_SET: if (offset < 0) return -1; newpos = offset; break; case SEEK_CUR: if ((offset < 0 && (off_t)(-1 * offset) > oldpos) || (offset > 0 && (offset+oldpos) < oldpos)) return -1; newpos = (off_t)lzw->total_out + offset; break; case SEEK_END: newpos = -1; break; default: errno = EINVAL; return -1; } if (whence != SEEK_END && newpos < oldpos) { closelzw(lzw->file); if (lzw->fd >= 0) { lseek(lzw->fd, 0, SEEK_SET); lzw->file = dopenlzw(lzw->fd, lzw->mode); } else if (lzw->path) { lzw->file = openlzw(lzw->path, lzw->mode); } else { errno = EINVAL; return -1; } if (lzw->file == (LZW_t*)0) { errno = EINVAL; return -1; } lzw->total_out = 0; } if (newpos == oldpos) return oldpos; else { char buf[1<<12]; while (newpos > oldpos || newpos == -1) { size_t req_size = MIN(sizeof(buf), newpos - oldpos); ssize_t got_size = readlzw(lzw->file, buf, req_size); if (got_size != (ssize_t)(req_size)) { if (got_size < 0) return -1; else { newpos = oldpos + got_size; break; } } oldpos += got_size; } return newpos; } } static int lzwclose(void *cookie) { lzwfile_t *lzw = (lzwfile_t*)cookie; if (!lzw) { errno = EINVAL; return -1; } if (lzw->file) closelzw(lzw->file); free(cookie); return 0; } __extension__ static cookie_io_functions_t iolzw = { .read = (cookie_read_function_t*) &lzwread, .write = (cookie_write_function_t*)&lzwwrite, .seek = (cookie_seek_function_t*) &lzwseek, .close = (cookie_close_function_t*)&lzwclose, }; static inline char autodetect(char **__restrict path, const char *__restrict check) { const size_t len = strlen(*path); char *suff = strrchr(*path, '.'); char *ext = *path; char what = 'n'; if (suff) { suff++; if (strcmp(suff, "z" ) == 0) what = 'z'; else if (strcmp(suff, "gz" ) == 0) what = 'g'; else if (strcmp(suff, "Z" ) == 0) what = 'Z'; else if (strcmp(suff, "bz2" ) == 0) what = 'b'; else if (strcmp(suff, "lzma") == 0) what = 'l'; else if (strcmp(suff, "xz" ) == 0) what = 'x'; } if (what == 'n' && *check == 'r') { int olderr, fd; struct stat st; char m[5]; ext = malloc(sizeof(char)*(len + 5 + 1)); if (!ext) goto out; strcpy(ext, *path); suff = (ext+len); olderr = errno; if (stat(strcat(ext, ".gz"), &st) == 0) { what = 'g'; goto skip; } *suff = '\0'; if (stat(strcat(ext, ".bz2"), &st) == 0) { what = 'b'; goto skip; } *suff = '\0'; if (stat(strcat(ext, ".z"), &st) == 0) { what = 'z'; goto skip; } *suff = '\0'; if (stat(strcat(ext, ".Z"), &st) == 0) { what = 'Z'; goto skip; } *suff = '\0'; if (stat(strcat(ext, ".lzma"), &st) == 0) { what = 'l'; goto skip; } *suff = '\0'; if (stat(strcat(ext, ".xz"), &st) == 0) { what = 'x'; goto skip; } *suff = '\0'; if ((fd = open(ext, O_RDONLY|O_NOCTTY)) < 0) goto skip; if (read(fd, m, sizeof(m)) == sizeof(m)) { if (m[0] == '\037' && m[1] == '\213') what = 'g'; if (m[0] == '\037' && m[1] == '\235') what = 'Z'; if (m[0] == '\037' && m[1] == '\236') what = 'z'; else if (m[0] == 'B' && m[1] == 'Z' && m[2] == 'h') what = 'b'; else if (m[0] == ']' && m[1] == '\0' && m[2] == '\0' && m[3] == '\200') /* weak!! */ what = 'l'; else if (m[0] == '\377' && m[1] == 'L' && m[2] == 'Z' && m[3] == 'M' && m[4] == 'A') what = 'l'; else if (m[0] == '\375' && m[1] == '7' && m[2] == 'z' && m[3] == 'X' && m[4] == 'Z') what = 'x'; } close(fd); skip: errno = olderr; } out: *path = ext; return what; } FILE * fzopen(const char * path, const char * mode) { FILE * ret = (FILE *)0; char * check = (char*)0, * ext = (char*)0; size_t n = 0, len; unsigned int i; char what = 'n'; if (!mode || !(n = strlen(mode))) { errno = EINVAL; goto out; } if (!(check = (char*)malloc(n*sizeof(char)))) goto out; /* No append mode possible */ switch (*mode) { case 'r': check[0] = 'r'; break; case 'w': check[0] = 'w'; break; default: errno = EINVAL; goto out; } for (i = 1; i < n; i++) { /* We can only open for reading OR writing but NOT for both */ switch (mode[i]) { case '\0': break; case '+': errno = EINVAL; goto out; case 'b': case 'x': check[i] = mode[i]; continue; /* Ingore switches for gzopen() */ case 'f': case 'h': check[i] = '\0'; continue; default: check[i] = '\0'; continue; } break; } if (!path || !(len = strlen(path))) { errno = EINVAL; goto out; } ext = (char *)path; what = autodetect(&ext, check); switch (what) { case 'g': case 'z': /* Is this correct? Old gzip magic */ #if defined(HAS_ZLIB_H) { gzFile cookie; if (&gzopen == NULL) { errno = ENOSYS; goto out; } if (!(cookie = gzopen(ext, mode))) { if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, ioz))) { gzclose(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } #else /* !HAS_ZLIB_H */ errno = ENOTSUP; #endif /* !HAS_ZLIB_H */ break; case 'Z': { lzwfile_t *__restrict cookie; if (*mode != 'r') { errno = ENOTSUP; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(lzwfile_t)+strsize(ext)+strsize(mode)) != 0) goto out; memset(cookie, 0, alignof(lzwfile_t)+strsize(ext)+strsize(mode)); cookie->fd = -1; cookie->mode = ((char*)cookie)+alignof(lzwfile_t); cookie->path = cookie->mode + strsize(mode); strcpy(cookie->mode, mode); strcpy(cookie->path, ext); if (!(cookie->file = openlzw(ext, mode))) { free(cookie); if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzw))) { closelzw(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } break; case 'b': #if defined(HAS_BZLIB_H) { bzfile_t *__restrict cookie; int level = 5; if (&BZ2_bzopen == NULL) { errno = ENOSYS; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(bzfile_t)+strsize(ext)+strsize(mode)) != 0) goto out; memset(cookie, 0, alignof(bzfile_t)+strsize(ext)+strsize(mode)); for (i = 1; i < n; i++) { if (mode[i] >= '0' && mode[i] <= '9') { level = (int)mode[i]; break; } } cookie->fd = -1; cookie->mode = ((char*)cookie)+alignof(bzfile_t); cookie->path = cookie->mode+strsize(mode); strcpy(cookie->mode, mode); strcpy(cookie->path, ext); if (!(cookie->file = BZ2_bzopen(ext, mode))) { free(cookie); if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iobz))) { BZ2_bzclose(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } #else /* !HAS_BZLIB_H */ errno = ENOTSUP; #endif /* !HAS_BZLIB_H */ break; #if defined(HAS_LZMA_H) case 'l': case 'x': { int level = LZMA_PRESET_DEFAULT; lzfile_t *__restrict cookie; lzma_ret lret; if (&lzma_auto_decoder == NULL) { errno = ENOSYS; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(lzfile_t)) != 0) goto out; memset(cookie, 0, alignof(lzfile_t)); if ((cookie->file = fopen(ext, check)) == NULL) { free(cookie); goto out; } for (i = 1; i < n; i++) { if (mode[i] >= '0' && mode[i] <= '9') { level = (int)mode[i]; break; } } cookie->eof = 0; cookie->what = what; cookie->strm = (lzma_stream)LZMA_STREAM_INIT; cookie->level = level; cookie->encoding = (check[0] == 'w') ? 1 : 0; lret = lzmaopen(&cookie->strm, check[0], what, level); if (lret != LZMA_OK) { fclose(cookie->file); free(cookie); errno = EINVAL; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzma))) { lzma_end(&cookie->strm); fclose(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } break; #else /* !HAS_LZMA_H */ case 'x': errno = ENOTSUP; break; case 'l': # if defined(HAS_LZMADEC_H) { lzmadec_FILE* cookie; if (*mode != 'r') { errno = ENOTSUP; goto out; } if (&lzmadec_open == NULL) { errno = ENOSYS; goto out; } if (!(cookie = lzmadec_open(ext))) { if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzma))) { lzmadec_close(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } # else /* !HAS_LZMADEC_H */ errno = ENOTSUP; # endif /* !HAS_LZMADEC_H */ #endif /* !HAS_LZMA_H */ break; default: ret = fopen(ext, mode); break; } out: if (check) free(check); if (ext && ext != path) free(ext); return ret; } FILE * fdzopen(int fildes, const char * mode, const char *what) { FILE * ret = (FILE *)0; char * check = (char*)0; size_t n = 0; unsigned int i; if (!mode || !(n = strlen(mode))) { errno = EINVAL; goto out; } if (!(check = (char*)malloc(n*sizeof(char)))) goto out; /* No append mode possible */ switch (*mode) { case 'r': check[0] = 'r'; break; case 'w': check[0] = 'w'; break; default: errno = EINVAL; goto out; } for (i = 1; i < n; i++) { /* We can only open for reading OR writing but NOT for both */ switch (mode[i]) { case '\0': break; case '+': errno = EINVAL; goto out; case 'b': case 'x': check[i] = mode[i]; continue; /* Ingore switches for gzopen() */ case 'f': case 'h': check[i] = '\0'; continue; default: check[i] = '\0'; continue; } break; } switch (*what) { case 'g': case 'z': /* Is this correct? Old gzip magic */ #if defined(HAS_ZLIB_H) { gzFile cookie; if (&gzdopen == NULL) { errno = ENOSYS; goto out; } if (!(cookie = gzdopen(fildes, mode))) { if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, ioz))) { gzclose(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } #else /* !HAS_ZLIB_H */ errno = ENOTSUP; #endif /* !HAS_ZLIB_H */ break; case 'Z': { lzwfile_t *__restrict cookie; if (*mode != 'r') { errno = ENOTSUP; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(lzwfile_t)+strsize(mode)) != 0) goto out; memset(cookie, 0, alignof(lzwfile_t)+strsize(mode)); cookie->fd = fildes; cookie->mode = ((char*)cookie)+alignof(lzwfile_t); strcpy(cookie->mode, mode); if (!(cookie->file = dopenlzw(fildes, mode))) { free(cookie); if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzw))) { closelzw(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } break; case 'b': #if defined(HAS_BZLIB_H) { bzfile_t *__restrict cookie; int level = 5; if (&BZ2_bzdopen == NULL) { errno = ENOSYS; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(bzfile_t)+strsize(mode)) != 0) goto out; memset(cookie, 0, alignof(bzfile_t)+strsize(mode)); for (i = 1; i < n; i++) { if (mode[i] >= '0' && mode[i] <= '9') { level = (int)mode[i]; break; } } cookie->fd = fildes; cookie->mode = ((char*)cookie)+alignof(bzfile_t); strcpy(cookie->mode, mode); if (cookie->mode == (char*)0) { free(cookie); goto out; } if (!(cookie->file = BZ2_bzdopen(fildes, mode))) { free(cookie); if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iobz))) { BZ2_bzclose(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } #else /* !HAS_BZLIB_H */ errno = ENOTSUP; #endif /* !HAS_BZLIB_H */ break; #if defined(HAS_LZMA_H) case 'l': case 'x': { int level = LZMA_PRESET_DEFAULT; lzfile_t *__restrict cookie; lzma_ret lret; if (&lzma_auto_decoder == NULL) { errno = ENOSYS; goto out; } if (posix_memalign((void*)&cookie, sizeof(void*), alignof(lzfile_t)) != 0) goto out; memset(cookie, 0, alignof(lzfile_t)); if ((cookie->file = fdopen(fildes, check)) == NULL) { free(cookie); goto out; } for (i = 1; i < n; i++) { if (mode[i] >= '0' && mode[i] <= '9') { level = (int)mode[i]; break; } } cookie->eof = 0; cookie->what = *what; cookie->strm = (lzma_stream)LZMA_STREAM_INIT; cookie->level = level; cookie->encoding = (check[0] == 'w') ? 1 : 0; lret = lzmaopen(&cookie->strm, check[0], *what, level); if (lret != LZMA_OK) { fclose(cookie->file); free(cookie); errno = EINVAL; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzma))) { lzma_end(&cookie->strm); fclose(cookie->file); free(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } break; #else /* !HAS_LZMA_H */ case 'x': errno = ENOTSUP; break; case 'l': # if defined(HAS_LZMADEC_H) { lzmadec_FILE* cookie; if (*mode != 'r') { errno = ENOTSUP; goto out; } if (&lzmadec_open == NULL) { errno = ENOSYS; goto out; } if (!(cookie = lzmadec_dopen(fildes))) { if (!errno) errno = ENOMEM; goto out; } if (!(ret = fopencookie((void*)cookie, check, iolzma))) { lzmadec_close(cookie); errno = EINVAL; goto out; } # ifndef LIBIO_IS_FIXED if (ret->_fileno < 0) ret->_fileno = 0; # endif } # else /* !HAS_LZMADEC_H */ errno = ENOTSUP; # endif /* !HAS_LZMADEC_H */ #endif /* !HAS_LZMA_H */ break; default: ret = fdopen(fildes, mode); break; } out: if (check) free(check); return ret; } libzio-0.99/zio.h.in000064400000000000000000000016301126000673500143200ustar00rootroot00000000000000/* * zio.h Provide an streamable interface to gziped/bzip2ed files * * Copyright 2004 Werner Fink, 2004 SuSE LINUX AG, Germany. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Author: Werner Fink */ #ifndef _ZIO_H #define _ZIO_H #include #define ZIO_VERSION @@VERSION@@ #ifdef __cplusplus extern "C" { #endif /* * This function can open a gziped file for reading OR writing, but * NOT both (not `+' possible) NOR can it open for appending (no `a'). */ extern FILE *fzopen __P((__const char *__restrict, __const char *__restrict)); extern FILE *fdzopen __P((int, __const char *__restrict mode, __const char *__restrict)); #ifdef __cplusplus } #endif #endif /* _ZIO_H */ libzio-0.99/zio.map000064400000000000000000000000561126000673500142420ustar00rootroot00000000000000{ global: fzopen; fdzopen; local: *; }; libzio-0.99/zioP.h000064400000000000000000000111671126000673500140410ustar00rootroot00000000000000/* * zioP.h Internal header for libzio, including required * standard glibc header, zlib.h, and bzlib.h. * Making the used libz and bzlib functions weak symbols. * * Copyright 2004 Werner Fink, 2004 SuSE LINUX AG, Germany. * Copyright 2006 Werner Fink, 2006 SuSE Products GmbH, Germany. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * Author: Werner Fink */ #ifndef _ZIO_P_H #define _ZIO_P_H #ifndef _GNU_SOURCE # define _GNU_SOURCE #endif #include #include #include #include #include #ifdef HAVE_LIBIO_H # include #endif #include #include #include #ifndef unused # define unused __attribute__((__unused__)) #endif #ifndef nonnull # define nonnull(parm) __attribute__((__nonnull__ parm)) #endif #ifndef wur # define wur __attribute__((__warn_unused_result__)) #endif #define alignof(type) (sizeof(type)+(sizeof(type)%sizeof(void*))) #define strsize(str) ((strlen(str)+1)*sizeof(char)) #if !defined(HAVE_FOPENCOOKIE) && !defined(HAVE_FUNOPEN) # error Requires fopencookie(3GNU) or funopen(3BSD) #endif #if defined(HAVE_LIBIO_H) || defined(HAVE_FOPENCOOKIE) # if defined __GLIBC__ && __GLIBC__ > 1 # undef LIBIO_IS_FIXED # if __GLIBC__ > 2 || (__GLIBC__ >= 2 && __GLIBC_MINOR__ > 0) # define LIBIO_IS_FIXED # endif # else # error The libzio requires the GLIBC # endif #endif #if defined __GNUC__ # if defined __USE_ISOC99 # define _cat_pragma(exp) _Pragma(#exp) # define _weak_pragma(exp) _cat_pragma(weak name) # else # define _weak_pragma(exp) # endif # define _declare(name) __extension__ extern __typeof__(name) name # define weak_symbol(name) _weak_pragma(name) _declare(name) __attribute__((weak)) #else # error The libzio requires the GCC #endif #if defined(HAS_ZLIB_H) # include # ifndef NO_WEAK weak_symbol(gzopen); weak_symbol(gzdopen); weak_symbol(gzread); weak_symbol(gzwrite); weak_symbol(gzseek); weak_symbol(gzflush); weak_symbol(gzclose); # endif #endif #if defined(HAS_BZLIB_H) # include # ifndef NO_WEAK weak_symbol(BZ2_bzopen); weak_symbol(BZ2_bzdopen); weak_symbol(BZ2_bzread); weak_symbol(BZ2_bzwrite); /* no BZ2_bzseek */ weak_symbol(BZ2_bzflush); weak_symbol(BZ2_bzclose); # endif #endif #if defined(HAS_LZMA_H) # include # include # ifndef NO_WEAK weak_symbol(lzma_easy_encoder); weak_symbol(lzma_lzma_preset); weak_symbol(lzma_alone_encoder); weak_symbol(lzma_auto_decoder); weak_symbol(lzma_code); weak_symbol(lzma_end); # endif #else /* !HAS_LZMA_H */ # if defined(HAS_LZMADEC_H) # include # include # ifndef NO_WEAK weak_symbol(lzmadec_open); weak_symbol(lzmadec_dopen); weak_symbol(lzmadec_read); /* no lzmadec_write() */ weak_symbol(lzmadec_seek); weak_symbol(lzmadec_close); /* no lzmadec_flush() */ # endif # endif #endif /* !HAS_LZMA_H */ #if defined(HAVE_FOPENCOOKIE) # undef HAVE_FUNOPEN __extension__ typedef off_t zio_off_t; __extension__ typedef int zio_int_t; # if !defined(LIBIO_IS_FIXED) __extension__ typedef _IO_cookie_io_functions_t cookie_io_functions_t; __extension__ typedef ssize_t cookie_read_function_t __P ((void *, char *, size_t)); __extension__ typedef ssize_t cookie_write_function_t __P ((void *, const char *, size_t)); __extension__ typedef int cookie_seek_function_t __P ((void *, off_t, int)); __extension__ typedef int cookie_close_function_t __P ((void *)); # endif #endif #if defined(HAVE_FUNOPEN) __extension__ typedef size_t zio_off_t; __extension__ typedef fpos_t zio_int_t; __extension__ typedef int cookie_read_function_t __P ((void *, char *, int)); __extension__ typedef int cookie_write_function_t __P ((void *, const char *, int)); __extension__ typedef fpos_t cookie_seek_function_t __P ((void *, fpos_t, int)); __extension__ typedef int cookie_close_function_t __P ((void *)); __extension__ typedef struct { cookie_read_function_t *read; cookie_write_function_t *write; cookie_seek_function_t *seek; cookie_close_function_t *close; } cookie_io_functions_t; static __inline__ FILE *fopencookie(void *__restrict, const char *__restrict, cookie_io_functions_t) nonnull((1,2)) wur; static __inline__ FILE *fopencookie(void *__restrict cookie, const char *__restrict mode unused, cookie_io_functions_t io_funcs) { return funopen(cookie, io_funcs.read, io_funcs.write, io_funcs.seek, io_funcs.close); } #endif #endif /* _ZIO_P_H */