| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 1999-2011, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| * |
| * Memory mapped file wrappers for use by the ICU Data Implementation |
| * All of the platform-specific implementation for mapping data files |
| * is here. The rest of the ICU Data implementation uses only the |
| * wrapper functions. |
| * |
| *----------------------------------------------------------------------------*/ |
| |
| #include "unicode/putil.h" |
| #include "udatamem.h" |
| #include "umapfile.h" |
| |
| /* memory-mapping base definitions ------------------------------------------ */ |
| |
| #if MAP_IMPLEMENTATION==MAP_WIN32 |
| # define WIN32_LEAN_AND_MEAN |
| # define VC_EXTRALEAN |
| # define NOUSER |
| # define NOSERVICE |
| # define NOIME |
| # define NOMCX |
| # include <windows.h> |
| # include "cmemory.h" |
| |
| typedef HANDLE MemoryMap; |
| |
| # define IS_MAP(map) ((map)!=NULL) |
| #elif MAP_IMPLEMENTATION==MAP_POSIX || MAP_IMPLEMENTATION==MAP_390DLL |
| typedef size_t MemoryMap; |
| |
| # define IS_MAP(map) ((map)!=0) |
| |
| # include <unistd.h> |
| # include <sys/mman.h> |
| # include <sys/stat.h> |
| # include <fcntl.h> |
| |
| # ifndef MAP_FAILED |
| # define MAP_FAILED ((void*)-1) |
| # endif |
| |
| # if MAP_IMPLEMENTATION==MAP_390DLL |
| /* No memory mapping for 390 batch mode. Fake it using dll loading. */ |
| # include <dll.h> |
| # include "cstring.h" |
| # include "cmemory.h" |
| # include "unicode/udata.h" |
| # define LIB_PREFIX "lib" |
| # define LIB_SUFFIX ".dll" |
| /* This is inconvienient until we figure out what to do with U_ICUDATA_NAME in utypes.h */ |
| # define U_ICUDATA_ENTRY_NAME "icudt" U_ICU_VERSION_SHORT U_LIB_SUFFIX_C_NAME_STRING "_dat" |
| # endif |
| #elif MAP_IMPLEMENTATION==MAP_STDIO |
| # include <stdio.h> |
| # include "cmemory.h" |
| |
| typedef void *MemoryMap; |
| |
| # define IS_MAP(map) ((map)!=NULL) |
| #endif |
| |
| /*----------------------------------------------------------------------------* |
| * * |
| * Memory Mapped File support. Platform dependent implementation of * |
| * functions used by the rest of the implementation.* |
| * * |
| *----------------------------------------------------------------------------*/ |
| #if MAP_IMPLEMENTATION==MAP_NONE |
| U_CFUNC UBool |
| uprv_mapFile(UDataMemory *pData, const char *path) { |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| return FALSE; /* no file access */ |
| } |
| |
| U_CFUNC void uprv_unmapFile(UDataMemory *pData) { |
| /* nothing to do */ |
| } |
| #elif MAP_IMPLEMENTATION==MAP_WIN32 |
| U_CFUNC UBool |
| uprv_mapFile( |
| UDataMemory *pData, /* Fill in with info on the result doing the mapping. */ |
| /* Output only; any original contents are cleared. */ |
| const char *path /* File path to be opened/mapped */ |
| ) |
| { |
| HANDLE map; |
| HANDLE file; |
| SECURITY_ATTRIBUTES mappingAttributes; |
| SECURITY_ATTRIBUTES *mappingAttributesPtr = NULL; |
| SECURITY_DESCRIPTOR securityDesc; |
| |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| |
| /* open the input file */ |
| file=CreateFileA(path, GENERIC_READ, FILE_SHARE_READ, NULL, |
| OPEN_EXISTING, |
| FILE_ATTRIBUTE_NORMAL|FILE_FLAG_RANDOM_ACCESS, NULL); |
| if(file==INVALID_HANDLE_VALUE) { |
| return FALSE; |
| } |
| |
| /* Declare and initialize a security descriptor. |
| This is required for multiuser systems on Windows 2000 SP4 and beyond */ |
| if (InitializeSecurityDescriptor(&securityDesc, SECURITY_DESCRIPTOR_REVISION)) { |
| /* give the security descriptor a Null Dacl done using the "TRUE, (PACL)NULL" here */ |
| if (SetSecurityDescriptorDacl(&securityDesc, TRUE, (PACL)NULL, FALSE)) { |
| /* Make the security attributes point to the security descriptor */ |
| uprv_memset(&mappingAttributes, 0, sizeof(mappingAttributes)); |
| mappingAttributes.nLength = sizeof(mappingAttributes); |
| mappingAttributes.lpSecurityDescriptor = &securityDesc; |
| mappingAttributes.bInheritHandle = FALSE; /* object uninheritable */ |
| mappingAttributesPtr = &mappingAttributes; |
| } |
| } |
| /* else creating security descriptors can fail when we are on Windows 98, |
| and mappingAttributesPtr == NULL for that case. */ |
| |
| /* create an unnamed Windows file-mapping object for the specified file */ |
| map=CreateFileMapping(file, mappingAttributesPtr, PAGE_READONLY, 0, 0, NULL); |
| CloseHandle(file); |
| if(map==NULL) { |
| return FALSE; |
| } |
| |
| /* map a view of the file into our address space */ |
| pData->pHeader=(const DataHeader *)MapViewOfFile(map, FILE_MAP_READ, 0, 0, 0); |
| if(pData->pHeader==NULL) { |
| CloseHandle(map); |
| return FALSE; |
| } |
| pData->map=map; |
| return TRUE; |
| } |
| |
| U_CFUNC void |
| uprv_unmapFile(UDataMemory *pData) { |
| if(pData!=NULL && pData->map!=NULL) { |
| UnmapViewOfFile(pData->pHeader); |
| CloseHandle(pData->map); |
| pData->pHeader=NULL; |
| pData->map=NULL; |
| } |
| } |
| |
| |
| |
| #elif MAP_IMPLEMENTATION==MAP_POSIX |
| U_CFUNC UBool |
| uprv_mapFile(UDataMemory *pData, const char *path) { |
| int fd; |
| int length; |
| struct stat mystat; |
| void *data; |
| |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| |
| /* determine the length of the file */ |
| if(stat(path, &mystat)!=0 || mystat.st_size<=0) { |
| return FALSE; |
| } |
| length=mystat.st_size; |
| |
| /* open the file */ |
| fd=open(path, O_RDONLY); |
| if(fd==-1) { |
| return FALSE; |
| } |
| |
| /* get a view of the mapping */ |
| #if U_PLATFORM != U_PF_HPUX |
| data=mmap(0, length, PROT_READ, MAP_SHARED, fd, 0); |
| #else |
| data=mmap(0, length, PROT_READ, MAP_PRIVATE, fd, 0); |
| #endif |
| close(fd); /* no longer needed */ |
| if(data==MAP_FAILED) { |
| return FALSE; |
| } |
| |
| pData->map = (char *)data + length; |
| pData->pHeader=(const DataHeader *)data; |
| pData->mapAddr = data; |
| #if U_PLATFORM == U_PF_IPHONE |
| posix_madvise(data, length, POSIX_MADV_RANDOM); |
| #endif |
| return TRUE; |
| } |
| |
| U_CFUNC void |
| uprv_unmapFile(UDataMemory *pData) { |
| if(pData!=NULL && pData->map!=NULL) { |
| size_t dataLen = (char *)pData->map - (char *)pData->mapAddr; |
| if(munmap(pData->mapAddr, dataLen)==-1) { |
| } |
| pData->pHeader=NULL; |
| pData->map=0; |
| pData->mapAddr=NULL; |
| } |
| } |
| |
| |
| |
| #elif MAP_IMPLEMENTATION==MAP_STDIO |
| /* copy of the filestrm.c/T_FileStream_size() implementation */ |
| static int32_t |
| umap_fsize(FILE *f) { |
| int32_t savedPos = ftell(f); |
| int32_t size = 0; |
| |
| /*Changes by Bertrand A. D. doesn't affect the current position |
| goes to the end of the file before ftell*/ |
| fseek(f, 0, SEEK_END); |
| size = (int32_t)ftell(f); |
| fseek(f, savedPos, SEEK_SET); |
| return size; |
| } |
| |
| U_CFUNC UBool |
| uprv_mapFile(UDataMemory *pData, const char *path) { |
| FILE *file; |
| int32_t fileLength; |
| void *p; |
| |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| /* open the input file */ |
| file=fopen(path, "rb"); |
| if(file==NULL) { |
| return FALSE; |
| } |
| |
| /* get the file length */ |
| fileLength=umap_fsize(file); |
| if(ferror(file) || fileLength<=20) { |
| fclose(file); |
| return FALSE; |
| } |
| |
| /* allocate the memory to hold the file data */ |
| p=uprv_malloc(fileLength); |
| if(p==NULL) { |
| fclose(file); |
| return FALSE; |
| } |
| |
| /* read the file */ |
| if(fileLength!=fread(p, 1, fileLength, file)) { |
| uprv_free(p); |
| fclose(file); |
| return FALSE; |
| } |
| |
| fclose(file); |
| pData->map=p; |
| pData->pHeader=(const DataHeader *)p; |
| pData->mapAddr=p; |
| return TRUE; |
| } |
| |
| U_CFUNC void |
| uprv_unmapFile(UDataMemory *pData) { |
| if(pData!=NULL && pData->map!=NULL) { |
| uprv_free(pData->map); |
| pData->map = NULL; |
| pData->mapAddr = NULL; |
| pData->pHeader = NULL; |
| } |
| } |
| |
| |
| #elif MAP_IMPLEMENTATION==MAP_390DLL |
| /* 390 specific Library Loading. |
| * This is the only platform left that dynamically loads an ICU Data Library. |
| * All other platforms use .data files when dynamic loading is required, but |
| * this turn out to be awkward to support in 390 batch mode. |
| * |
| * The idea here is to hide the fact that 390 is using dll loading from the |
| * rest of ICU, and make it look like there is file loading happening. |
| * |
| */ |
| |
| static char *strcpy_returnEnd(char *dest, const char *src) |
| { |
| while((*dest=*src)!=0) { |
| ++dest; |
| ++src; |
| } |
| return dest; |
| } |
| |
| /*------------------------------------------------------------------------------ |
| * |
| * computeDirPath given a user-supplied path of an item to be opened, |
| * compute and return |
| * - the full directory path to be used |
| * when opening the file. |
| * - Pointer to null at end of above returned path |
| * |
| * Parameters: |
| * path: input path. Buffer is not altered. |
| * pathBuffer: Output buffer. Any contents are overwritten. |
| * |
| * Returns: |
| * Pointer to null termination in returned pathBuffer. |
| * |
| * TODO: This works the way ICU historically has, but the |
| * whole data fallback search path is so complicated that |
| * proabably almost no one will ever really understand it, |
| * the potential for confusion is large. (It's not just |
| * this one function, but the whole scheme.) |
| * |
| *------------------------------------------------------------------------------*/ |
| static char *uprv_computeDirPath(const char *path, char *pathBuffer) |
| { |
| char *finalSlash; /* Ptr to last dir separator in input path, or null if none. */ |
| int32_t pathLen; /* Length of the returned directory path */ |
| |
| finalSlash = 0; |
| if (path != 0) { |
| finalSlash = uprv_strrchr(path, U_FILE_SEP_CHAR); |
| } |
| |
| *pathBuffer = 0; |
| if (finalSlash == 0) { |
| /* No user-supplied path. |
| * Copy the ICU_DATA path to the path buffer and return that*/ |
| const char *icuDataDir; |
| icuDataDir=u_getDataDirectory(); |
| if(icuDataDir!=NULL && *icuDataDir!=0) { |
| return strcpy_returnEnd(pathBuffer, icuDataDir); |
| } else { |
| /* there is no icuDataDir either. Just return the empty pathBuffer. */ |
| return pathBuffer; |
| } |
| } |
| |
| /* User supplied path did contain a directory portion. |
| * Copy it to the output path buffer */ |
| pathLen = (int32_t)(finalSlash - path + 1); |
| uprv_memcpy(pathBuffer, path, pathLen); |
| *(pathBuffer+pathLen) = 0; |
| return pathBuffer+pathLen; |
| } |
| |
| |
| # define DATA_TYPE "dat" |
| |
| U_CFUNC UBool uprv_mapFile(UDataMemory *pData, const char *path) { |
| const char *inBasename; |
| char *basename; |
| char pathBuffer[1024]; |
| const DataHeader *pHeader; |
| dllhandle *handle; |
| void *val=0; |
| |
| inBasename=uprv_strrchr(path, U_FILE_SEP_CHAR); |
| if(inBasename==NULL) { |
| inBasename = path; |
| } else { |
| inBasename++; |
| } |
| basename=uprv_computeDirPath(path, pathBuffer); |
| if(uprv_strcmp(inBasename, U_ICUDATA_NAME".dat") != 0) { |
| /* must mmap file... for build */ |
| int fd; |
| int length; |
| struct stat mystat; |
| void *data; |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| |
| /* determine the length of the file */ |
| if(stat(path, &mystat)!=0 || mystat.st_size<=0) { |
| return FALSE; |
| } |
| length=mystat.st_size; |
| |
| /* open the file */ |
| fd=open(path, O_RDONLY); |
| if(fd==-1) { |
| return FALSE; |
| } |
| |
| /* get a view of the mapping */ |
| data=mmap(0, length, PROT_READ, MAP_PRIVATE, fd, 0); |
| close(fd); /* no longer needed */ |
| if(data==MAP_FAILED) { |
| return FALSE; |
| } |
| pData->map = (char *)data + length; |
| pData->pHeader=(const DataHeader *)data; |
| pData->mapAddr = data; |
| return TRUE; |
| } |
| |
| # ifdef OS390BATCH |
| /* ### hack: we still need to get u_getDataDirectory() fixed |
| for OS/390 (batch mode - always return "//"? ) |
| and this here straightened out with LIB_PREFIX and LIB_SUFFIX (both empty?!) |
| This is probably due to the strange file system on OS/390. It's more like |
| a database with short entry names than a typical file system. */ |
| /* U_ICUDATA_NAME should always have the correct name */ |
| /* BUT FOR BATCH MODE IT IS AN EXCEPTION BECAUSE */ |
| /* THE FIRST THREE LETTERS ARE PREASSIGNED TO THE */ |
| /* PROJECT!!!!! */ |
| uprv_strcpy(pathBuffer, "IXMI" U_ICU_VERSION_SHORT "DA"); |
| # else |
| /* set up the library name */ |
| uprv_strcpy(basename, LIB_PREFIX U_LIBICUDATA_NAME U_ICU_VERSION_SHORT LIB_SUFFIX); |
| # endif |
| |
| # ifdef UDATA_DEBUG |
| fprintf(stderr, "dllload: %s ", pathBuffer); |
| # endif |
| |
| handle=dllload(pathBuffer); |
| |
| # ifdef UDATA_DEBUG |
| fprintf(stderr, " -> %08X\n", handle ); |
| # endif |
| |
| if(handle != NULL) { |
| /* we have a data DLL - what kind of lookup do we need here? */ |
| /* try to find the Table of Contents */ |
| UDataMemory_init(pData); /* Clear the output struct. */ |
| val=dllqueryvar((dllhandle*)handle, U_ICUDATA_ENTRY_NAME); |
| if(val == 0) { |
| /* failed... so keep looking */ |
| return FALSE; |
| } |
| # ifdef UDATA_DEBUG |
| fprintf(stderr, "dllqueryvar(%08X, %s) -> %08X\n", handle, U_ICUDATA_ENTRY_NAME, val); |
| # endif |
| |
| pData->pHeader=(const DataHeader *)val; |
| return TRUE; |
| } else { |
| return FALSE; /* no handle */ |
| } |
| } |
| |
| U_CFUNC void uprv_unmapFile(UDataMemory *pData) { |
| if(pData!=NULL && pData->map!=NULL) { |
| uprv_free(pData->map); |
| pData->map = NULL; |
| pData->mapAddr = NULL; |
| pData->pHeader = NULL; |
| } |
| } |
| |
| #else |
| # error MAP_IMPLEMENTATION is set incorrectly |
| #endif |
