777 lines
29 KiB
C
777 lines
29 KiB
C
/*
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* Internal function/structure declaration. Do NOT include in your
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* application.
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*
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* Please see the file LICENSE.txt in the source's root directory.
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*
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* This file written by Ryan C. Gordon.
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*/
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#ifndef _INCLUDE_PHYSFS_INTERNAL_H_
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#define _INCLUDE_PHYSFS_INTERNAL_H_
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#ifndef __PHYSICSFS_INTERNAL__
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#error Do not include this header from your applications.
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#endif
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/* Turn off MSVC warnings that are aggressively anti-portability. */
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#if defined(_MSC_VER) && !defined(_CRT_SECURE_NO_WARNINGS)
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#define _CRT_SECURE_NO_WARNINGS 1
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#endif
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#include "physfs.h"
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/* The holy trinity. */
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "physfs_platforms.h"
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#include <assert.h>
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#define __PHYSFS_COMPILE_TIME_ASSERT(name, x) \
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typedef int __PHYSFS_compile_time_assert_##name[(x) * 2 - 1]
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/* !!! FIXME: remove this when revamping stack allocation code... */
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#if defined(_MSC_VER) || defined(__MINGW32__) || defined(__WATCOMC__)
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#include <malloc.h>
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#endif
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#if defined(PHYSFS_PLATFORM_SOLARIS) || defined(PHYSFS_PLATFORM_LINUX)
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#include <alloca.h>
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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#ifdef __GNUC__
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#define PHYSFS_MINIMUM_GCC_VERSION(major, minor) \
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( ((__GNUC__ << 16) + __GNUC_MINOR__) >= (((major) << 16) + (minor)) )
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#else
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#define PHYSFS_MINIMUM_GCC_VERSION(major, minor) (0)
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#endif
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#ifdef __cplusplus
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/* C++ always has a real inline keyword. */
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#elif (defined macintosh) && !(defined __MWERKS__)
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# define inline
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#elif (defined _MSC_VER)
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# define inline __inline
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#endif
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#if defined(PHYSFS_PLATFORM_LINUX) && !defined(_FILE_OFFSET_BITS)
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#define _FILE_OFFSET_BITS 64
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#endif
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/* All public APIs need to be in physfs.h with a PHYSFS_DECL.
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All file-private symbols need to be marked "static".
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Everything shared between PhysicsFS sources needs to be in this
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file between the visibility pragma blocks. */
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#if !defined(_WIN32) && (PHYSFS_MINIMUM_GCC_VERSION(4,0) || defined(__clang__))
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#define PHYSFS_HAVE_PRAGMA_VISIBILITY 1
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#endif
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#if PHYSFS_HAVE_PRAGMA_VISIBILITY
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#pragma GCC visibility push(hidden)
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#endif
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/* These are the build-in archivers. We list them all as "extern" here without
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#ifdefs to keep it tidy, but obviously you need to make sure these are
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wrapped in PHYSFS_SUPPORTS_* checks before actually referencing them. */
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extern const PHYSFS_Archiver __PHYSFS_Archiver_DIR;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_ZIP;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_7Z;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_GRP;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_QPAK;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_HOG;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_MVL;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_WAD;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_SLB;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_ISO9660;
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extern const PHYSFS_Archiver __PHYSFS_Archiver_VDF;
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/* a real C99-compliant snprintf() is in Visual Studio 2015,
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but just use this everywhere for binary compatibility. */
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#if defined(_MSC_VER)
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#include <stdarg.h>
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int __PHYSFS_msvc_vsnprintf(char *outBuf, size_t size, const char *format, va_list ap);
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int __PHYSFS_msvc_snprintf(char *outBuf, size_t size, const char *format, ...);
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#define vsnprintf __PHYSFS_msvc_vsnprintf
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#define snprintf __PHYSFS_msvc_snprintf
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#endif
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/* Some simple wrappers around WinRT C++ interfaces we can call from C. */
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#ifdef PHYSFS_PLATFORM_WINRT
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const void *__PHYSFS_winrtCalcBaseDir(void);
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const void *__PHYSFS_winrtCalcPrefDir(void);
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#endif
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/* atomic operations. */
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/* increment/decrement operations return the final incremented/decremented value. */
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#if defined(_MSC_VER) && (_MSC_VER >= 1500)
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#include <intrin.h>
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__PHYSFS_COMPILE_TIME_ASSERT(LongEqualsInt, sizeof (int) == sizeof (long));
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#define __PHYSFS_ATOMIC_INCR(ptrval) _InterlockedIncrement((long*)(ptrval))
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#define __PHYSFS_ATOMIC_DECR(ptrval) _InterlockedDecrement((long*)(ptrval))
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#elif defined(__clang__) || (defined(__GNUC__) && (((__GNUC__ * 10000) + (__GNUC_MINOR__ * 100)) >= 40100))
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#define __PHYSFS_ATOMIC_INCR(ptrval) __sync_add_and_fetch(ptrval, 1)
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#define __PHYSFS_ATOMIC_DECR(ptrval) __sync_add_and_fetch(ptrval, -1)
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#elif defined(__WATCOMC__) && defined(__386__)
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extern __inline int _xadd_watcom(volatile int *a, int v);
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#pragma aux _xadd_watcom = \
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"lock xadd [ecx], eax" \
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parm [ecx] [eax] \
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value [eax] \
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modify exact [eax];
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#define __PHYSFS_ATOMIC_INCR(ptrval) (_xadd_watcom(ptrval, 1)+1)
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#define __PHYSFS_ATOMIC_DECR(ptrval) (_xadd_watcom(ptrval, -1)-1)
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#else
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#define PHYSFS_NEED_ATOMIC_OP_FALLBACK 1
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int __PHYSFS_ATOMIC_INCR(int *ptrval);
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int __PHYSFS_ATOMIC_DECR(int *ptrval);
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#endif
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/*
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* Interface for small allocations. If you need a little scratch space for
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* a throwaway buffer or string, use this. It will make small allocations
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* on the stack if possible, and use allocator.Malloc() if they are too
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* large. This helps reduce malloc pressure.
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* There are some rules, though:
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* NEVER return a pointer from this, as stack-allocated buffers go away
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* when your function returns.
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* NEVER allocate in a loop, as stack-allocated pointers will pile up. Call
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* a function that uses smallAlloc from your loop, so the allocation can
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* free each time.
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* NEVER call smallAlloc with any complex expression (it's a macro that WILL
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* have side effects...it references the argument multiple times). Use a
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* variable or a literal.
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* NEVER free a pointer from this with anything but smallFree. It will not
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* be a valid pointer to the allocator, regardless of where the memory came
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* from.
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* NEVER realloc a pointer from this.
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* NEVER forget to use smallFree: it may not be a pointer from the stack.
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* NEVER forget to check for NULL...allocation can fail here, of course!
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*/
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#define __PHYSFS_SMALLALLOCTHRESHOLD 256
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void *__PHYSFS_initSmallAlloc(void *ptr, const size_t len);
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#define __PHYSFS_smallAlloc(bytes) ( \
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__PHYSFS_initSmallAlloc( \
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(((bytes) < __PHYSFS_SMALLALLOCTHRESHOLD) ? \
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alloca((size_t)((bytes)+sizeof(void*))) : NULL), (bytes)) \
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)
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void __PHYSFS_smallFree(void *ptr);
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/* Use the allocation hooks. */
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#define malloc(x) Do not use malloc() directly.
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#define realloc(x, y) Do not use realloc() directly.
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#define free(x) Do not use free() directly.
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/* !!! FIXME: add alloca check here. */
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/* by default, enable things, so builds can opt out of a few things they
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want to avoid. But you can build with this #defined to 0 if you would
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like to turn off everything except a handful of things you opt into. */
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#ifndef PHYSFS_SUPPORTS_DEFAULT
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#define PHYSFS_SUPPORTS_DEFAULT 1
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#endif
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#ifndef PHYSFS_SUPPORTS_ZIP
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#define PHYSFS_SUPPORTS_ZIP PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_7Z
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#define PHYSFS_SUPPORTS_7Z PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_GRP
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#define PHYSFS_SUPPORTS_GRP PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_HOG
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#define PHYSFS_SUPPORTS_HOG PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_MVL
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#define PHYSFS_SUPPORTS_MVL PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_WAD
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#define PHYSFS_SUPPORTS_WAD PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_QPAK
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#define PHYSFS_SUPPORTS_QPAK PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_SLB
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#define PHYSFS_SUPPORTS_SLB PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_ISO9660
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#define PHYSFS_SUPPORTS_ISO9660 PHYSFS_SUPPORTS_DEFAULT
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#endif
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#ifndef PHYSFS_SUPPORTS_VDF
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#define PHYSFS_SUPPORTS_VDF PHYSFS_SUPPORTS_DEFAULT
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#endif
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#if PHYSFS_SUPPORTS_7Z
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/* 7zip support needs a global init function called at startup (no deinit). */
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extern void SZIP_global_init(void);
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#endif
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/* The latest supported PHYSFS_Io::version value. */
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#define CURRENT_PHYSFS_IO_API_VERSION 0
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/* The latest supported PHYSFS_Archiver::version value. */
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#define CURRENT_PHYSFS_ARCHIVER_API_VERSION 0
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/* This byteorder stuff was lifted from SDL. https://www.libsdl.org/ */
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#define PHYSFS_LIL_ENDIAN 1234
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#define PHYSFS_BIG_ENDIAN 4321
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#ifdef __linux__
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#include <endian.h>
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#define PHYSFS_BYTEORDER __BYTE_ORDER
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#elif defined(__OpenBSD__) || defined(__DragonFly__)
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#include <endian.h>
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#define PHYSFS_BYTEORDER BYTE_ORDER
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#elif defined(__FreeBSD__) || defined(__NetBSD__)
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#include <sys/endian.h>
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#define PHYSFS_BYTEORDER BYTE_ORDER
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/* predefs from newer gcc and clang versions: */
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#elif defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__) && defined(__BYTE_ORDER__)
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#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
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#define PHYSFS_BYTEORDER PHYSFS_LIL_ENDIAN
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#elif (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
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#define PHYSFS_BYTEORDER PHYSFS_BIG_ENDIAN
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#else
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#error Unsupported endianness
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#endif /**/
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#else
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#if defined(__hppa__) || \
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defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
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(defined(__MIPS__) && defined(__MIPSEB__)) || \
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defined(__ppc__) || defined(__POWERPC__) || defined(__powerpc__) || defined(__PPC__) || \
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defined(__sparc__)
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#define PHYSFS_BYTEORDER PHYSFS_BIG_ENDIAN
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#else
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#define PHYSFS_BYTEORDER PHYSFS_LIL_ENDIAN
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#endif
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#endif /* __linux__ */
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/*
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* When sorting the entries in an archive, we use a modified QuickSort.
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* When there are less then PHYSFS_QUICKSORT_THRESHOLD entries left to sort,
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* we switch over to a BubbleSort for the remainder. Tweak to taste.
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*
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* You can override this setting by defining PHYSFS_QUICKSORT_THRESHOLD
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* before #including "physfs_internal.h".
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*/
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#ifndef PHYSFS_QUICKSORT_THRESHOLD
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#define PHYSFS_QUICKSORT_THRESHOLD 4
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#endif
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/*
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* Sort an array (or whatever) of (max) elements. This uses a mixture of
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* a QuickSort and BubbleSort internally.
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* (cmpfn) is used to determine ordering, and (swapfn) does the actual
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* swapping of elements in the list.
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*/
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void __PHYSFS_sort(void *entries, size_t max,
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int (*cmpfn)(void *, size_t, size_t),
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void (*swapfn)(void *, size_t, size_t));
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/* These get used all over for lessening code clutter. */
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/* "ERRPASS" means "something else just set the error state for us" and is
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just to make it clear where the responsibility for the error state lays. */
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#define BAIL(e, r) do { if (e) PHYSFS_setErrorCode(e); return r; } while (0)
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#define BAIL_ERRPASS(r) do { return r; } while (0)
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#define BAIL_IF(c, e, r) do { if (c) { if (e) PHYSFS_setErrorCode(e); return r; } } while (0)
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#define BAIL_IF_ERRPASS(c, r) do { if (c) { return r; } } while (0)
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#define BAIL_MUTEX(e, m, r) do { if (e) PHYSFS_setErrorCode(e); __PHYSFS_platformReleaseMutex(m); return r; } while (0)
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#define BAIL_MUTEX_ERRPASS(m, r) do { __PHYSFS_platformReleaseMutex(m); return r; } while (0)
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#define BAIL_IF_MUTEX(c, e, m, r) do { if (c) { if (e) PHYSFS_setErrorCode(e); __PHYSFS_platformReleaseMutex(m); return r; } } while (0)
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#define BAIL_IF_MUTEX_ERRPASS(c, m, r) do { if (c) { __PHYSFS_platformReleaseMutex(m); return r; } } while (0)
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#define GOTO(e, g) do { if (e) PHYSFS_setErrorCode(e); goto g; } while (0)
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#define GOTO_ERRPASS(g) do { goto g; } while (0)
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#define GOTO_IF(c, e, g) do { if (c) { if (e) PHYSFS_setErrorCode(e); goto g; } } while (0)
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#define GOTO_IF_ERRPASS(c, g) do { if (c) { goto g; } } while (0)
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#define GOTO_MUTEX(e, m, g) do { if (e) PHYSFS_setErrorCode(e); __PHYSFS_platformReleaseMutex(m); goto g; } while (0)
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#define GOTO_MUTEX_ERRPASS(m, g) do { __PHYSFS_platformReleaseMutex(m); goto g; } while (0)
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#define GOTO_IF_MUTEX(c, e, m, g) do { if (c) { if (e) PHYSFS_setErrorCode(e); __PHYSFS_platformReleaseMutex(m); goto g; } } while (0)
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#define GOTO_IF_MUTEX_ERRPASS(c, m, g) do { if (c) { __PHYSFS_platformReleaseMutex(m); goto g; } } while (0)
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#define __PHYSFS_ARRAYLEN(x) ( (sizeof (x)) / (sizeof (x[0])) )
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#ifdef PHYSFS_NO_64BIT_SUPPORT
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#define __PHYSFS_SI64(x) ((PHYSFS_sint64) (x))
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#define __PHYSFS_UI64(x) ((PHYSFS_uint64) (x))
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#elif (defined __GNUC__)
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#define __PHYSFS_SI64(x) x##LL
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#define __PHYSFS_UI64(x) x##ULL
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#elif (defined _MSC_VER)
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#define __PHYSFS_SI64(x) x##i64
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#define __PHYSFS_UI64(x) x##ui64
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#else
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#define __PHYSFS_SI64(x) ((PHYSFS_sint64) (x))
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#define __PHYSFS_UI64(x) ((PHYSFS_uint64) (x))
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#endif
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/*
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* Check if a ui64 will fit in the platform's address space.
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* The initial sizeof check will optimize this macro out entirely on
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* 64-bit (and larger?!) platforms, and the other condition will
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* return zero or non-zero if the variable will fit in the platform's
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* size_t, suitable to pass to malloc. This is kinda messy, but effective.
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*/
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#define __PHYSFS_ui64FitsAddressSpace(s) ( \
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(sizeof (PHYSFS_uint64) <= sizeof (size_t)) || \
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((s) < (__PHYSFS_UI64(0xFFFFFFFFFFFFFFFF) >> (64-(sizeof(size_t)*8)))) \
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)
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/*
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* Like strdup(), but uses the current PhysicsFS allocator.
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*/
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char *__PHYSFS_strdup(const char *str);
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/*
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* Give a hash value for a C string (uses djb's xor hashing algorithm).
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*/
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PHYSFS_uint32 __PHYSFS_hashString(const char *str);
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/*
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* Give a hash value for a C string (uses djb's xor hashing algorithm), case folding as it goes.
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*/
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PHYSFS_uint32 __PHYSFS_hashStringCaseFold(const char *str);
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/*
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* Give a hash value for a C string (uses djb's xor hashing algorithm), case folding as it goes,
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* assuming that this is only US-ASCII chars (one byte per char, only 'A' through 'Z' need folding).
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*/
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PHYSFS_uint32 __PHYSFS_hashStringCaseFoldUSAscii(const char *str);
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/*
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* The current allocator. Not valid before PHYSFS_init is called!
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*/
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extern PHYSFS_Allocator __PHYSFS_AllocatorHooks;
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/* convenience macro to make this less cumbersome internally... */
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#define allocator __PHYSFS_AllocatorHooks
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/*
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* Create a PHYSFS_Io for a file in the physical filesystem.
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* This path is in platform-dependent notation. (mode) must be 'r', 'w', or
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* 'a' for Read, Write, or Append.
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*/
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PHYSFS_Io *__PHYSFS_createNativeIo(const char *path, const int mode);
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/*
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* Create a PHYSFS_Io for a buffer of memory (READ-ONLY). If you already
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* have one of these, just use its duplicate() method, and it'll increment
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* its refcount without allocating a copy of the buffer.
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*/
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PHYSFS_Io *__PHYSFS_createMemoryIo(const void *buf, PHYSFS_uint64 len,
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void (*destruct)(void *));
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/*
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* Read (len) bytes from (io) into (buf). Returns non-zero on success,
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* zero on i/o error. Literally: "return (io->read(io, buf, len) == len);"
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*/
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int __PHYSFS_readAll(PHYSFS_Io *io, void *buf, const size_t len);
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/* These are shared between some archivers. */
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/* LOTS of legacy formats that only use US ASCII, not actually UTF-8, so let them optimize here. */
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void *UNPK_openArchive(PHYSFS_Io *io, const int case_sensitive, const int only_usascii);
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void UNPK_abandonArchive(void *opaque);
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void UNPK_closeArchive(void *opaque);
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void *UNPK_addEntry(void *opaque, char *name, const int isdir,
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const PHYSFS_sint64 ctime, const PHYSFS_sint64 mtime,
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const PHYSFS_uint64 pos, const PHYSFS_uint64 len);
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PHYSFS_Io *UNPK_openRead(void *opaque, const char *name);
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PHYSFS_Io *UNPK_openWrite(void *opaque, const char *name);
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PHYSFS_Io *UNPK_openAppend(void *opaque, const char *name);
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int UNPK_remove(void *opaque, const char *name);
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int UNPK_mkdir(void *opaque, const char *name);
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int UNPK_stat(void *opaque, const char *fn, PHYSFS_Stat *st);
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#define UNPK_enumerate __PHYSFS_DirTreeEnumerate
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/* Optional API many archivers use this to manage their directory tree. */
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/* !!! FIXME: document this better. */
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typedef struct __PHYSFS_DirTreeEntry
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{
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char *name; /* Full path in archive. */
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struct __PHYSFS_DirTreeEntry *hashnext; /* next item in hash bucket. */
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struct __PHYSFS_DirTreeEntry *children; /* linked list of kids, if dir. */
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struct __PHYSFS_DirTreeEntry *sibling; /* next item in same dir. */
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int isdir;
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} __PHYSFS_DirTreeEntry;
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typedef struct __PHYSFS_DirTree
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{
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__PHYSFS_DirTreeEntry *root; /* root of directory tree. */
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__PHYSFS_DirTreeEntry **hash; /* all entries hashed for fast lookup. */
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size_t hashBuckets; /* number of buckets in hash. */
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size_t entrylen; /* size in bytes of entries (including subclass). */
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int case_sensitive; /* non-zero to treat entries as case-sensitive in DirTreeFind */
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int only_usascii; /* non-zero to treat paths as US ASCII only (one byte per char, only 'A' through 'Z' are considered for case folding). */
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} __PHYSFS_DirTree;
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/* LOTS of legacy formats that only use US ASCII, not actually UTF-8, so let them optimize here. */
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int __PHYSFS_DirTreeInit(__PHYSFS_DirTree *dt, const size_t entrylen, const int case_sensitive, const int only_usascii);
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void *__PHYSFS_DirTreeAdd(__PHYSFS_DirTree *dt, char *name, const int isdir);
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void *__PHYSFS_DirTreeFind(__PHYSFS_DirTree *dt, const char *path);
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PHYSFS_EnumerateCallbackResult __PHYSFS_DirTreeEnumerate(void *opaque,
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const char *dname, PHYSFS_EnumerateCallback cb,
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const char *origdir, void *callbackdata);
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void __PHYSFS_DirTreeDeinit(__PHYSFS_DirTree *dt);
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/*--------------------------------------------------------------------------*/
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/*--------------------------------------------------------------------------*/
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/*------------ ----------------*/
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/*------------ You MUST implement the following functions ----------------*/
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/*------------ if porting to a new platform. ----------------*/
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/*------------ (see platform/unix.c for an example) ----------------*/
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/*------------ ----------------*/
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/*--------------------------------------------------------------------------*/
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/*--------------------------------------------------------------------------*/
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/*
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* The dir separator; '/' on unix, '\\' on win32, ":" on MacOS, etc...
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* Obviously, this isn't a function. If you need more than one char for this,
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* you'll need to pull some old pieces of PhysicsFS out of revision control.
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*/
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#if defined(PHYSFS_PLATFORM_WINDOWS) || defined(PHYSFS_PLATFORM_OS2)
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#define __PHYSFS_platformDirSeparator '\\'
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#else
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#define __PHYSFS_STANDARD_DIRSEP 1
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#define __PHYSFS_platformDirSeparator '/'
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#endif
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/*
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* Initialize the platform. This is called when PHYSFS_init() is called from
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* the application.
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*
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* Return zero if there was a catastrophic failure (which prevents you from
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* functioning at all), and non-zero otherwise.
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*/
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int __PHYSFS_platformInit(void);
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/*
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* Deinitialize the platform. This is called when PHYSFS_deinit() is called
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* from the application. You can use this to clean up anything you've
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* allocated in your platform driver.
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*/
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void __PHYSFS_platformDeinit(void);
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/*
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* Open a file for reading. (filename) is in platform-dependent notation. The
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* file pointer should be positioned on the first byte of the file.
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*
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* The return value will be some platform-specific datatype that is opaque to
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* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32.
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*
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* The same file can be opened for read multiple times, and each should have
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* a unique file handle; this is frequently employed to prevent race
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* conditions in the archivers.
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*
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* Call PHYSFS_setErrorCode() and return (NULL) if the file can't be opened.
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*/
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void *__PHYSFS_platformOpenRead(const char *filename);
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/*
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* Open a file for writing. (filename) is in platform-dependent notation. If
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* the file exists, it should be truncated to zero bytes, and if it doesn't
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* exist, it should be created as a zero-byte file. The file pointer should
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* be positioned on the first byte of the file.
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*
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* The return value will be some platform-specific datatype that is opaque to
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* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32,
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* etc.
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*
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* Opening a file for write multiple times has undefined results.
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*
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* Call PHYSFS_setErrorCode() and return (NULL) if the file can't be opened.
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*/
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void *__PHYSFS_platformOpenWrite(const char *filename);
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/*
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* Open a file for appending. (filename) is in platform-dependent notation. If
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* the file exists, the file pointer should be place just past the end of the
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* file, so that the first write will be one byte after the current end of
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* the file. If the file doesn't exist, it should be created as a zero-byte
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* file. The file pointer should be positioned on the first byte of the file.
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*
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* The return value will be some platform-specific datatype that is opaque to
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* the caller; it could be a (FILE *) under Unix, or a (HANDLE *) under win32,
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* etc.
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*
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* Opening a file for append multiple times has undefined results.
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*
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* Call PHYSFS_setErrorCode() and return (NULL) if the file can't be opened.
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*/
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void *__PHYSFS_platformOpenAppend(const char *filename);
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/*
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* Read more data from a platform-specific file handle. (opaque) should be
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* cast to whatever data type your platform uses. Read a maximum of (len)
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* 8-bit bytes to the area pointed to by (buf). If there isn't enough data
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* available, return the number of bytes read, and position the file pointer
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* immediately after those bytes.
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* On success, return (len) and position the file pointer immediately past
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* the end of the last read byte. Return (-1) if there is a catastrophic
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* error, and call PHYSFS_setErrorCode() to describe the problem; the file
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* pointer should not move in such a case. A partial read is success; only
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* return (-1) on total failure; presumably, the next read call after a
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* partial read will fail as such.
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*/
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PHYSFS_sint64 __PHYSFS_platformRead(void *opaque, void *buf, PHYSFS_uint64 len);
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/*
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* Write more data to a platform-specific file handle. (opaque) should be
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* cast to whatever data type your platform uses. Write a maximum of (len)
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* 8-bit bytes from the area pointed to by (buffer). If there is a problem,
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* return the number of bytes written, and position the file pointer
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* immediately after those bytes. Return (-1) if there is a catastrophic
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* error, and call PHYSFS_setErrorCode() to describe the problem; the file
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* pointer should not move in such a case. A partial write is success; only
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* return (-1) on total failure; presumably, the next write call after a
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* partial write will fail as such.
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*/
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PHYSFS_sint64 __PHYSFS_platformWrite(void *opaque, const void *buffer,
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PHYSFS_uint64 len);
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/*
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* Set the file pointer to a new position. (opaque) should be cast to
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* whatever data type your platform uses. (pos) specifies the number
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* of 8-bit bytes to seek to from the start of the file. Seeking past the
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* end of the file is an error condition, and you should check for it.
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*
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* Not all file types can seek; this is to be expected by the caller.
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*
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* On error, call PHYSFS_setErrorCode() and return zero. On success, return
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* a non-zero value.
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*/
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int __PHYSFS_platformSeek(void *opaque, PHYSFS_uint64 pos);
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/*
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* Get the file pointer's position, in an 8-bit byte offset from the start of
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* the file. (opaque) should be cast to whatever data type your platform
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* uses.
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*
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* Not all file types can "tell"; this is to be expected by the caller.
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*
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* On error, call PHYSFS_setErrorCode() and return -1. On success, return >= 0.
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*/
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PHYSFS_sint64 __PHYSFS_platformTell(void *opaque);
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/*
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* Determine the current size of a file, in 8-bit bytes, from an open file.
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*
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* The caller expects that this information may not be available for all
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* file types on all platforms.
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*
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* Return -1 if you can't do it, and call PHYSFS_setErrorCode(). Otherwise,
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* return the file length in 8-bit bytes.
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*/
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PHYSFS_sint64 __PHYSFS_platformFileLength(void *handle);
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/*
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* Read filesystem metadata for a specific path.
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*
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* This needs to fill in all the fields of (stat). For fields that might not
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* mean anything on a platform (access time, perhaps), choose a reasonable
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* default. if (follow), we want to follow symlinks and stat what they
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* link to and not the link itself.
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*
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* Return zero on failure, non-zero on success.
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*/
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int __PHYSFS_platformStat(const char *fn, PHYSFS_Stat *stat, const int follow);
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/*
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* Flush any pending writes to disk. (opaque) should be cast to whatever data
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* type your platform uses. Be sure to check for errors; the caller expects
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* that this function can fail if there was a flushing error, etc.
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*
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* Return zero on failure, non-zero on success.
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*/
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int __PHYSFS_platformFlush(void *opaque);
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/*
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* Close file and deallocate resources. (opaque) should be cast to whatever
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* data type your platform uses. This should close the file in any scenario:
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* flushing is a separate function call, and this function should never fail.
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*
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* You should clean up all resources associated with (opaque); the pointer
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* will be considered invalid after this call.
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*/
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void __PHYSFS_platformClose(void *opaque);
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/*
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* Platform implementation of PHYSFS_getCdRomDirsCallback()...
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* CD directories are discovered and reported to the callback one at a time.
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* Pointers passed to the callback are assumed to be invalid to the
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* application after the callback returns, so you can free them or whatever.
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* Callback does not assume results will be sorted in any meaningful way.
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*/
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void __PHYSFS_platformDetectAvailableCDs(PHYSFS_StringCallback cb, void *data);
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/*
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* Calculate the base dir, if your platform needs special consideration.
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* Just return NULL if the standard routines will suffice. (see
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* calculateBaseDir() in physfs.c ...)
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* Your string must end with a dir separator if you don't return NULL.
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* Caller will allocator.Free() the retval if it's not NULL.
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*/
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char *__PHYSFS_platformCalcBaseDir(const char *argv0);
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/*
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* Get the platform-specific user dir.
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* As of PhysicsFS 2.1, returning NULL means fatal error.
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* Your string must end with a dir separator if you don't return NULL.
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* Caller will allocator.Free() the retval if it's not NULL.
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*/
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char *__PHYSFS_platformCalcUserDir(void);
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/* This is the cached version from PHYSFS_init(). This is a fast call. */
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const char *__PHYSFS_getUserDir(void); /* not deprecated internal version. */
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/*
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* Get the platform-specific pref dir.
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* Returning NULL means fatal error.
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* Your string must end with a dir separator if you don't return NULL.
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* Caller will allocator.Free() the retval if it's not NULL.
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* Caller will make missing directories if necessary; this just reports
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* the final path.
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*/
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char *__PHYSFS_platformCalcPrefDir(const char *org, const char *app);
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/*
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* Return a pointer that uniquely identifies the current thread.
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* On a platform without threading, (0x1) will suffice. These numbers are
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* arbitrary; the only requirement is that no two threads have the same
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* pointer.
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*/
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void *__PHYSFS_platformGetThreadID(void);
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/*
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* Enumerate a directory of files. This follows the rules for the
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* PHYSFS_Archiver::enumerate() method, except that the (dirName) that is
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* passed to this function is converted to platform-DEPENDENT notation by
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* the caller. The PHYSFS_Archiver version uses platform-independent
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* notation. Note that ".", "..", and other meta-entries should always
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* be ignored.
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*/
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PHYSFS_EnumerateCallbackResult __PHYSFS_platformEnumerate(const char *dirname,
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PHYSFS_EnumerateCallback callback,
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const char *origdir, void *callbackdata);
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/*
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* Make a directory in the actual filesystem. (path) is specified in
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* platform-dependent notation. On error, return zero and set the error
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* message. Return non-zero on success.
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*/
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int __PHYSFS_platformMkDir(const char *path);
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/*
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* Remove a file or directory entry in the actual filesystem. (path) is
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* specified in platform-dependent notation. Note that this deletes files
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* _and_ directories, so you might need to do some determination.
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* Non-empty directories should report an error and not delete themselves
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* or their contents.
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*
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* Deleting a symlink should remove the link, not what it points to.
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*
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* On error, return zero and set the error message. Return non-zero on success.
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*/
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int __PHYSFS_platformDelete(const char *path);
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/*
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* Create a platform-specific mutex. This can be whatever datatype your
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* platform uses for mutexes, but it is cast to a (void *) for abstractness.
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*
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* Return (NULL) if you couldn't create one. Systems without threads can
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* return any arbitrary non-NULL value.
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*/
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void *__PHYSFS_platformCreateMutex(void);
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/*
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* Destroy a platform-specific mutex, and clean up any resources associated
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* with it. (mutex) is a value previously returned by
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* __PHYSFS_platformCreateMutex(). This can be a no-op on single-threaded
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* platforms.
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*/
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void __PHYSFS_platformDestroyMutex(void *mutex);
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/*
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* Grab possession of a platform-specific mutex. Mutexes should be recursive;
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* that is, the same thread should be able to call this function multiple
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* times in a row without causing a deadlock. This function should block
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* until a thread can gain possession of the mutex.
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*
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* Return non-zero if the mutex was grabbed, zero if there was an
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* unrecoverable problem grabbing it (this should not be a matter of
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* timing out! We're talking major system errors; block until the mutex
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* is available otherwise.)
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*
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* _DO NOT_ call PHYSFS_setErrorCode() in here! Since setErrorCode calls this
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* function, you'll cause an infinite recursion. This means you can't
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* use the BAIL_*MACRO* macros, either.
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*/
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int __PHYSFS_platformGrabMutex(void *mutex);
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/*
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* Relinquish possession of the mutex when this method has been called
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* once for each time that platformGrabMutex was called. Once possession has
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* been released, the next thread in line to grab the mutex (if any) may
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* proceed.
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*
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* _DO NOT_ call PHYSFS_setErrorCode() in here! Since setErrorCode calls this
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* function, you'll cause an infinite recursion. This means you can't
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* use the BAIL_*MACRO* macros, either.
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*/
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void __PHYSFS_platformReleaseMutex(void *mutex);
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/* !!! FIXME: move to public API? */
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PHYSFS_uint32 __PHYSFS_utf8codepoint(const char **_str);
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#if PHYSFS_HAVE_PRAGMA_VISIBILITY
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#pragma GCC visibility pop
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#endif
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#ifdef __cplusplus
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}
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#endif
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#endif
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/* end of physfs_internal.h ... */
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