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Merge pull request #2965 from facebook/offbase

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Converge sumtype (offset | repcode) numeric representation towards offBase
This commit is contained in:
Yann Collet
2022-01-24 15:47:42 -08:00
committed by GitHub
parent 70df5de1b2 03903f5701
commit cc7d23bcec
12 changed files with 275 additions and 218 deletions
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contrib/seekable_format/zstdseek_decompress.c
+52 -1
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@@ -23,13 +23,64 @@
# endif
#endif
/* ************************************************************
* Detect POSIX version
* PLATFORM_POSIX_VERSION = 0 for non-Unix e.g. Windows
* PLATFORM_POSIX_VERSION = 1 for Unix-like but non-POSIX
* PLATFORM_POSIX_VERSION > 1 is equal to found _POSIX_VERSION
* Value of PLATFORM_POSIX_VERSION can be forced on command line
***************************************************************/
#ifndef PLATFORM_POSIX_VERSION
# if (defined(__APPLE__) && defined(__MACH__)) || defined(__SVR4) || defined(_AIX) || defined(__hpux) /* POSIX.1-2001 (SUSv3) conformant */ \
|| defined(__DragonFly__) || defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) /* BSD distros */
/* exception rule : force posix version to 200112L,
* note: it's better to use unistd.h's _POSIX_VERSION whenever possible */
# define PLATFORM_POSIX_VERSION 200112L
/* try to determine posix version through official unistd.h's _POSIX_VERSION (http://pubs.opengroup.org/onlinepubs/7908799/xsh/unistd.h.html).
* note : there is no simple way to know in advance if <unistd.h> is present or not on target system,
* Posix specification mandates its presence and its content, but target system must respect this spec.
* It's necessary to _not_ #include <unistd.h> whenever target OS is not unix-like
* otherwise it will block preprocessing stage.
* The following list of build macros tries to "guess" if target OS is likely unix-like, and therefore can #include <unistd.h>
*/
# elif !defined(_WIN32) \
&& ( defined(__unix__) || defined(__unix) \
|| defined(__midipix__) || defined(__VMS) || defined(__HAIKU__) )
# if defined(__linux__) || defined(__linux) || defined(__CYGWIN__)
# ifndef _POSIX_C_SOURCE
# define _POSIX_C_SOURCE 200809L /* feature test macro : https://www.gnu.org/software/libc/manual/html_node/Feature-Test-Macros.html */
# endif
# endif
# include <unistd.h> /* declares _POSIX_VERSION */
# if defined(_POSIX_VERSION) /* POSIX compliant */
# define PLATFORM_POSIX_VERSION _POSIX_VERSION
# else
# define PLATFORM_POSIX_VERSION 1
# endif
# ifdef __UCLIBC__
# ifndef __USE_MISC
# define __USE_MISC /* enable st_mtim on uclibc */
# endif
# endif
# else /* non-unix target platform (like Windows) */
# define PLATFORM_POSIX_VERSION 0
# endif
#endif /* PLATFORM_POSIX_VERSION */
/* ************************************************************
* Avoid fseek()'s 2GiB barrier with MSVC, macOS, *BSD, MinGW
***************************************************************/
#if defined(_MSC_VER) && _MSC_VER >= 1400
# define LONG_SEEK _fseeki64
#elif !defined(__64BIT__) && (PLATFORM_POSIX_VERSION >= 200112L) /* No point defining Large file for 64 bit */
# define LONG_SEEK fseeko
# define LONG_SEEK fseeko
#elif defined(__MINGW32__) && !defined(__STRICT_ANSI__) && !defined(__NO_MINGW_LFS) && defined(__MSVCRT__)
# define LONG_SEEK fseeko64
#elif defined(_WIN32) && !defined(__DJGPP__)