Update ICU to 54.1 step 1

source/common/icuplug.c

-/*
-******************************************************************************
-*
-*   Copyright (C) 2009-2012, International Business Machines
-*   Corporation and others.  All Rights Reserved.
-*
-******************************************************************************
-*
-*  FILE NAME : icuplug.c
-*
-*   Date         Name        Description
-*   10/29/2009   sl          New.
-******************************************************************************
-*/
-
-#include "unicode/icuplug.h"
-#include "icuplugimp.h"
-#include "cstring.h"
-#include "cmemory.h"
-#include "putilimp.h"
-#include "ucln.h"
-#include <stdio.h>
-#ifdef __MVS__  /* defined by z/OS compiler */
-#define _POSIX_SOURCE
-#include <cics.h> /* 12 Nov 2011 JAM iscics() function */
-#endif
-
-#ifndef UPLUG_TRACE
-#define UPLUG_TRACE 0
-#endif
-
-#if UPLUG_TRACE
-#include <stdio.h>
-#define DBG(x) fprintf(stderr, "%s:%d: ",__FILE__,__LINE__); fprintf x
-#endif
-
-/**
- * Internal structure of an ICU plugin. 
- */
-
-struct UPlugData {
-  UPlugEntrypoint  *entrypoint; /**< plugin entrypoint */
-  uint32_t structSize;    /**< initialized to the size of this structure */
-  uint32_t token;         /**< must be U_PLUG_TOKEN */
-  void *lib;              /**< plugin library, or NULL */
-  char libName[UPLUG_NAME_MAX];   /**< library name */
-  char sym[UPLUG_NAME_MAX];        /**< plugin symbol, or NULL */
-  char config[UPLUG_NAME_MAX];     /**< configuration data */
-  void *context;          /**< user context data */
-  char name[UPLUG_NAME_MAX];   /**< name of plugin */
-  UPlugLevel  level; /**< level of plugin */
-  UBool   awaitingLoad; /**< TRUE if the plugin is awaiting a load call */
-  UBool   dontUnload; /**< TRUE if plugin must stay resident (leak plugin and lib) */
-  UErrorCode pluginStatus; /**< status code of plugin */
-};
-
-
-
-#define UPLUG_LIBRARY_INITIAL_COUNT 8
-#define UPLUG_PLUGIN_INITIAL_COUNT 12
-
-/**
- * Remove an item
- * @param list the full list
- * @param listSize the number of entries in the list
- * @param memberSize the size of one member
- * @param itemToRemove the item number of the member
- * @return the new listsize 
- */
-static int32_t uplug_removeEntryAt(void *list, int32_t listSize, int32_t memberSize, int32_t itemToRemove) {
-  uint8_t *bytePtr = (uint8_t *)list;
-    
-  /* get rid of some bad cases first */
-  if(listSize<1) {
-    return listSize;
-  }
-    
-  /* is there anything to move? */
-  if(listSize > itemToRemove+1) {
-    memmove(bytePtr+(itemToRemove*memberSize), bytePtr+((itemToRemove+1)*memberSize), memberSize);
-  }
-    
-  return listSize-1;
-}
-
-
-
-
-#if U_ENABLE_DYLOAD
-/**
- * Library management. Internal. 
- * @internal
- */
-struct UPlugLibrary;
-
-/**
- * Library management. Internal. 
- * @internal
- */
-typedef struct UPlugLibrary {
-  void *lib;                           /**< library ptr */
-  char name[UPLUG_NAME_MAX]; /**< library name */
-  uint32_t ref;                        /**< reference count */
-} UPlugLibrary;
-
-static UPlugLibrary   staticLibraryList[UPLUG_LIBRARY_INITIAL_COUNT];
-static UPlugLibrary * libraryList = staticLibraryList;
-static int32_t libraryCount = 0;
-static int32_t libraryMax = UPLUG_LIBRARY_INITIAL_COUNT;
-
-/**
- * Search for a library. Doesn't lock
- * @param libName libname to search for
- * @return the library's struct
- */
-static int32_t searchForLibraryName(const char *libName) {
-  int32_t i;
-    
-  for(i=0;i<libraryCount;i++) {
-    if(!uprv_strcmp(libName, libraryList[i].name)) {
-      return i;
-    }
-  }
-  return -1;
-}
-
-static int32_t searchForLibrary(void *lib) {
-  int32_t i;
-    
-  for(i=0;i<libraryCount;i++) {
-    if(lib==libraryList[i].lib) {
-      return i;
-    }
-  }
-  return -1;
-}
-
-U_INTERNAL char * U_EXPORT2
-uplug_findLibrary(void *lib, UErrorCode *status) {
-  int32_t libEnt;
-  char *ret = NULL;
-  if(U_FAILURE(*status)) {
-    return NULL;
-  }
-  libEnt = searchForLibrary(lib);
-  if(libEnt!=-1) { 
-    ret = libraryList[libEnt].name;
-  } else {
-    *status = U_MISSING_RESOURCE_ERROR;
-  }
-  return ret;
-}
-
-U_INTERNAL void * U_EXPORT2
-uplug_openLibrary(const char *libName, UErrorCode *status) {
-  int32_t libEntry = -1;
-  void *lib = NULL;
-    
-  if(U_FAILURE(*status)) return NULL;
-
-  libEntry = searchForLibraryName(libName);
-  if(libEntry == -1) {
-    libEntry = libraryCount++;
-    if(libraryCount >= libraryMax) {
-      /* Ran out of library slots. Statically allocated because we can't depend on allocating memory.. */
-      *status = U_MEMORY_ALLOCATION_ERROR;
-#if UPLUG_TRACE
-      DBG((stderr, "uplug_openLibrary() - out of library slots (max %d)\n", libraryMax));
-#endif
-      return NULL;
-    }
-    /* Some operating systems don't want 
-       DL operations from multiple threads. */
-    libraryList[libEntry].lib = uprv_dl_open(libName, status);
-#if UPLUG_TRACE
-    DBG((stderr, "uplug_openLibrary(%s,%s) libEntry %d, lib %p\n", libName, u_errorName(*status), libEntry, lib));
-#endif
-        
-    if(libraryList[libEntry].lib == NULL || U_FAILURE(*status)) {
-      /* cleanup. */
-      libraryList[libEntry].lib = NULL; /* failure with open */
-      libraryList[libEntry].name[0] = 0;
-#if UPLUG_TRACE
-      DBG((stderr, "uplug_openLibrary(%s,%s) libEntry %d, lib %p\n", libName, u_errorName(*status), libEntry, lib));
-#endif
-      /* no need to free - just won't increase the count. */
-      libraryCount--;
-    } else { /* is it still there? */
-      /* link it in */
-      uprv_strncpy(libraryList[libEntry].name,libName,UPLUG_NAME_MAX);
-      libraryList[libEntry].ref=1;
-      lib = libraryList[libEntry].lib;
-    }
-
-  } else {
-    lib = libraryList[libEntry].lib;
-    libraryList[libEntry].ref++;
-  }
-  return lib;
-}
-
-U_INTERNAL void U_EXPORT2
-uplug_closeLibrary(void *lib, UErrorCode *status) {
-  int32_t i;
-    
-#if UPLUG_TRACE
-  DBG((stderr, "uplug_closeLibrary(%p,%s) list %p\n", lib, u_errorName(*status), (void*)libraryList));
-#endif
-  if(U_FAILURE(*status)) return;
-    
-  for(i=0;i<libraryCount;i++) {
-    if(lib==libraryList[i].lib) {
-      if(--(libraryList[i].ref) == 0) {
-        uprv_dl_close(libraryList[i].lib, status);
-        libraryCount = uplug_removeEntryAt(libraryList, libraryCount, sizeof(*libraryList), i);
-      }
-      return;
-    }
-  }
-  *status = U_INTERNAL_PROGRAM_ERROR; /* could not find the entry! */
-}
-
-#endif
-
-static UPlugData pluginList[UPLUG_PLUGIN_INITIAL_COUNT];
-static int32_t pluginCount = 0;
-
-
-
-  
-static int32_t uplug_pluginNumber(UPlugData* d) {
-  UPlugData *pastPlug = &pluginList[pluginCount];
-  if(d<=pluginList) {
-    return 0;
-  } else if(d>=pastPlug) {
-    return pluginCount;
-  } else {
-    return (d-pluginList)/sizeof(pluginList[0]);
-  }
-}
-
-
-U_CAPI UPlugData * U_EXPORT2
-uplug_nextPlug(UPlugData *prior) {
-  if(prior==NULL) {
-    return pluginList;
-  } else {
-    UPlugData *nextPlug = &prior[1];
-    UPlugData *pastPlug = &pluginList[pluginCount];
-    
-    if(nextPlug>=pastPlug) {
-      return NULL;
-    } else {
-      return nextPlug;
-    }
-  }
-}
-
-
-
-/**
- * Call the plugin with some params
- */
-static void uplug_callPlug(UPlugData *plug, UPlugReason reason, UErrorCode *status) {
-  UPlugTokenReturn token;
-  if(plug==NULL||U_FAILURE(*status)) {
-    return;
-  }
-  token = (*(plug->entrypoint))(plug, reason, status);
-  if(token!=UPLUG_TOKEN) {
-    *status = U_INTERNAL_PROGRAM_ERROR;
-  }
-}
-
-
-static void uplug_unloadPlug(UPlugData *plug, UErrorCode *status) {
-  if(plug->awaitingLoad) {  /* shouldn't happen. Plugin hasn'tbeen loaded yet.*/
-    *status = U_INTERNAL_PROGRAM_ERROR;
-    return; 
-  }
-  if(U_SUCCESS(plug->pluginStatus)) {
-    /* Don't unload a plug which has a failing load status - means it didn't actually load. */
-    uplug_callPlug(plug, UPLUG_REASON_UNLOAD, status);
-  }
-}
-
-static void uplug_queryPlug(UPlugData *plug, UErrorCode *status) {
-  if(!plug->awaitingLoad || !(plug->level == UPLUG_LEVEL_UNKNOWN) ) {  /* shouldn't happen. Plugin hasn'tbeen loaded yet.*/
-    *status = U_INTERNAL_PROGRAM_ERROR;
-    return; 
-  }
-  plug->level = UPLUG_LEVEL_INVALID;
-  uplug_callPlug(plug, UPLUG_REASON_QUERY, status);
-  if(U_SUCCESS(*status)) { 
-    if(plug->level == UPLUG_LEVEL_INVALID) {
-      plug->pluginStatus = U_PLUGIN_DIDNT_SET_LEVEL;
-      plug->awaitingLoad = FALSE;
-    }
-  } else {
-    plug->pluginStatus = U_INTERNAL_PROGRAM_ERROR;
-    plug->awaitingLoad = FALSE;
-  }
-}
-
-
-static void uplug_loadPlug(UPlugData *plug, UErrorCode *status) {
-  if(!plug->awaitingLoad || (plug->level < UPLUG_LEVEL_LOW) ) {  /* shouldn't happen. Plugin hasn'tbeen loaded yet.*/
-    *status = U_INTERNAL_PROGRAM_ERROR;
-    return;
-  }
-  uplug_callPlug(plug, UPLUG_REASON_LOAD, status);
-  plug->awaitingLoad = FALSE;
-  if(!U_SUCCESS(*status)) {
-    plug->pluginStatus = U_INTERNAL_PROGRAM_ERROR;
-  }
-}
-
-static UPlugData *uplug_allocateEmptyPlug(UErrorCode *status)
-{
-  UPlugData *plug = NULL;
-
-  if(U_FAILURE(*status)) {
-    return NULL;
-  }
-
-  if(pluginCount == UPLUG_PLUGIN_INITIAL_COUNT) {
-    *status = U_MEMORY_ALLOCATION_ERROR;
-    return NULL;
-  }
-
-  plug = &pluginList[pluginCount++];
-
-  plug->token = UPLUG_TOKEN;
-  plug->structSize = sizeof(UPlugData);
-  plug->name[0]=0;
-  plug->level = UPLUG_LEVEL_UNKNOWN; /* initialize to null state */
-  plug->awaitingLoad = TRUE;
-  plug->dontUnload = FALSE;
-  plug->pluginStatus = U_ZERO_ERROR;
-  plug->libName[0] = 0;
-  plug->config[0]=0;
-  plug->sym[0]=0;
-  plug->lib=NULL;
-  plug->entrypoint=NULL;
-
-
-  return plug;
-}
-
-static UPlugData *uplug_allocatePlug(UPlugEntrypoint *entrypoint, const char *config, void *lib, const char *symName,
-                                     UErrorCode *status) {
-  UPlugData *plug;
-
-  if(U_FAILURE(*status)) {
-    return NULL;
-  }
-
-  plug = uplug_allocateEmptyPlug(status);
-  if(config!=NULL) {
-    uprv_strncpy(plug->config, config, UPLUG_NAME_MAX);
-  } else {
-    plug->config[0] = 0;
-  }
-    
-  if(symName!=NULL) {
-    uprv_strncpy(plug->sym, symName, UPLUG_NAME_MAX);
-  } else {
-    plug->sym[0] = 0;
-  }
-    
-  plug->entrypoint = entrypoint;
-  plug->lib = lib;
-  uplug_queryPlug(plug, status);
-    
-  return plug;
-}
-
-static void uplug_deallocatePlug(UPlugData *plug, UErrorCode *status) {
-  UErrorCode subStatus = U_ZERO_ERROR;
-  if(!plug->dontUnload) {
-#if U_ENABLE_DYLOAD
-    uplug_closeLibrary(plug->lib, &subStatus);
-#endif
-  }
-  plug->lib = NULL;
-  if(U_SUCCESS(*status) && U_FAILURE(subStatus)) {
-    *status = subStatus;
-  }
-  /* shift plugins up and decrement count. */
-  if(U_SUCCESS(*status)) {
-    /* all ok- remove. */
-    pluginCount = uplug_removeEntryAt(pluginList, pluginCount, sizeof(plug[0]), uplug_pluginNumber(plug));
-  } else {
-    /* not ok- leave as a message. */
-    plug->awaitingLoad=FALSE;
-    plug->entrypoint=0;
-    plug->dontUnload=TRUE;
-  }
-}
-
-static void uplug_doUnloadPlug(UPlugData *plugToRemove, UErrorCode *status) {
-  if(plugToRemove != NULL) {
-    uplug_unloadPlug(plugToRemove, status);
-    uplug_deallocatePlug(plugToRemove, status);
-  }
-}
-
-U_CAPI void U_EXPORT2
-uplug_removePlug(UPlugData *plug, UErrorCode *status)  {
-  UPlugData *cursor = NULL;
-  UPlugData *plugToRemove = NULL;
-  if(U_FAILURE(*status)) return;
-    
-  for(cursor=pluginList;cursor!=NULL;) {
-    if(cursor==plug) {
-      plugToRemove = plug;
-      cursor=NULL;
-    } else {
-      cursor = uplug_nextPlug(cursor);
-    }
-  }
-    
-  uplug_doUnloadPlug(plugToRemove, status);
-}
-
-
-
-
-U_CAPI void U_EXPORT2 
-uplug_setPlugNoUnload(UPlugData *data, UBool dontUnload)
-{
-  data->dontUnload = dontUnload;
-}
-
-
-U_CAPI void U_EXPORT2
-uplug_setPlugLevel(UPlugData *data, UPlugLevel level) {
-  data->level = level;
-}
-
-
-U_CAPI UPlugLevel U_EXPORT2
-uplug_getPlugLevel(UPlugData *data) {
-  return data->level;
-}
-
-
-U_CAPI void U_EXPORT2
-uplug_setPlugName(UPlugData *data, const char *name) {
-  uprv_strncpy(data->name, name, UPLUG_NAME_MAX);
-}
-
-
-U_CAPI const char * U_EXPORT2
-uplug_getPlugName(UPlugData *data) {
-  return data->name;
-}
-
-
-U_CAPI const char * U_EXPORT2
-uplug_getSymbolName(UPlugData *data) {
-  return data->sym;
-}
-
-U_CAPI const char * U_EXPORT2
-uplug_getLibraryName(UPlugData *data, UErrorCode *status) {
-  if(data->libName[0]) {
-    return data->libName;
-  } else {
-#if U_ENABLE_DYLOAD
-    return uplug_findLibrary(data->lib, status);
-#else
-    return NULL;
-#endif
-  }
-}
-
-U_CAPI void * U_EXPORT2
-uplug_getLibrary(UPlugData *data) {
-  return data->lib;
-}
-
-U_CAPI void * U_EXPORT2
-uplug_getContext(UPlugData *data) {
-  return data->context;
-}
-
-
-U_CAPI void U_EXPORT2
-uplug_setContext(UPlugData *data, void *context) {
-  data->context = context;
-}
-
-U_CAPI const char* U_EXPORT2
-uplug_getConfiguration(UPlugData *data) {
-  return data->config;
-}
-
-U_INTERNAL UPlugData* U_EXPORT2
-uplug_getPlugInternal(int32_t n) { 
-  if(n <0 || n >= pluginCount) {
-    return NULL;
-  } else { 
-    return &(pluginList[n]);
-  }
-}
-
-
-U_CAPI UErrorCode U_EXPORT2
-uplug_getPlugLoadStatus(UPlugData *plug) {
-  return plug->pluginStatus;
-}
-
-
-
-
-/**
- * Initialize a plugin fron an entrypoint and library - but don't load it.
- */
-static UPlugData* uplug_initPlugFromEntrypointAndLibrary(UPlugEntrypoint *entrypoint, const char *config, void *lib, const char *sym,
-                                                         UErrorCode *status) {
-  UPlugData *plug = NULL;
-
-  plug = uplug_allocatePlug(entrypoint, config, lib, sym, status);
-
-  if(U_SUCCESS(*status)) {
-    return plug;
-  } else {
-    uplug_deallocatePlug(plug, status);
-    return NULL;
-  }
-}
-
-U_CAPI UPlugData* U_EXPORT2
-uplug_loadPlugFromEntrypoint(UPlugEntrypoint *entrypoint, const char *config, UErrorCode *status) {
-  UPlugData* plug = uplug_initPlugFromEntrypointAndLibrary(entrypoint, config, NULL, NULL, status);
-  uplug_loadPlug(plug, status);
-  return plug;
-}
-
-#if U_ENABLE_DYLOAD
-
-static UPlugData* 
-uplug_initErrorPlug(const char *libName, const char *sym, const char *config, const char *nameOrError, UErrorCode loadStatus, UErrorCode *status)
-{
-  UPlugData *plug = uplug_allocateEmptyPlug(status);
-  if(U_FAILURE(*status)) return NULL;
-
-  plug->pluginStatus = loadStatus;
-  plug->awaitingLoad = FALSE; /* Won't load. */
-  plug->dontUnload = TRUE; /* cannot unload. */
-
-  if(sym!=NULL) {
-    uprv_strncpy(plug->sym, sym, UPLUG_NAME_MAX);
-  }
-
-  if(libName!=NULL) {
-    uprv_strncpy(plug->libName, libName, UPLUG_NAME_MAX);
-  }
-
-  if(nameOrError!=NULL) {
-    uprv_strncpy(plug->name, nameOrError, UPLUG_NAME_MAX);
-  }
-
-  if(config!=NULL) {
-    uprv_strncpy(plug->config, config, UPLUG_NAME_MAX);
-  }
-
-  return plug;
-}
-
-/**
- * Fetch a plugin from DLL, and then initialize it from a library- but don't load it.
- */
-static UPlugData* 
-uplug_initPlugFromLibrary(const char *libName, const char *sym, const char *config, UErrorCode *status) {
-  void *lib = NULL;
-  UPlugData *plug = NULL;
-  if(U_FAILURE(*status)) { return NULL; }
-  lib = uplug_openLibrary(libName, status);
-  if(lib!=NULL && U_SUCCESS(*status)) {
-    UPlugEntrypoint *entrypoint = NULL;
-    entrypoint = (UPlugEntrypoint*)uprv_dlsym_func(lib, sym, status);
-
-    if(entrypoint!=NULL&&U_SUCCESS(*status)) {
-      plug = uplug_initPlugFromEntrypointAndLibrary(entrypoint, config, lib, sym, status);
-      if(plug!=NULL&&U_SUCCESS(*status)) {
-        plug->lib = lib; /* plug takes ownership of library */
-        lib = NULL; /* library is now owned by plugin. */
-      }
-    } else {
-      UErrorCode subStatus = U_ZERO_ERROR;
-      plug = uplug_initErrorPlug(libName,sym,config,"ERROR: Could not load entrypoint",(lib==NULL)?U_MISSING_RESOURCE_ERROR:*status,&subStatus);
-    }
-    if(lib!=NULL) { /* still need to close the lib */
-      UErrorCode subStatus = U_ZERO_ERROR;
-      uplug_closeLibrary(lib, &subStatus); /* don't care here */
-    }
-  } else {
-    UErrorCode subStatus = U_ZERO_ERROR;
-    plug = uplug_initErrorPlug(libName,sym,config,"ERROR: could not load library",(lib==NULL)?U_MISSING_RESOURCE_ERROR:*status,&subStatus);
-  }
-  return plug;
-}
-
-U_CAPI UPlugData* U_EXPORT2
-uplug_loadPlugFromLibrary(const char *libName, const char *sym, const char *config, UErrorCode *status) { 
-  UPlugData *plug = NULL;
-  if(U_FAILURE(*status)) { return NULL; }
-  plug = uplug_initPlugFromLibrary(libName, sym, config, status);
-  uplug_loadPlug(plug, status);
-
-  return plug;
-}
-
-#endif
-
-U_CAPI UPlugLevel U_EXPORT2 uplug_getCurrentLevel() {
-  if(cmemory_inUse()) {
-    return UPLUG_LEVEL_HIGH;
-  } else {
-    return UPLUG_LEVEL_LOW;
-  }
-}
-
-static UBool U_CALLCONV uplug_cleanup(void)
-{
-  int32_t i;
-    
-  UPlugData *pluginToRemove;
-  /* cleanup plugs */
-  for(i=0;i<pluginCount;i++) {
-    UErrorCode subStatus = U_ZERO_ERROR;
-    pluginToRemove = &pluginList[i];
-    /* unload and deallocate */
-    uplug_doUnloadPlug(pluginToRemove, &subStatus);
-  }
-  /* close other held libs? */
-  return TRUE;
-}
-
-#if U_ENABLE_DYLOAD
-
-static void uplug_loadWaitingPlugs(UErrorCode *status) {
-  int32_t i;
-  UPlugLevel currentLevel = uplug_getCurrentLevel();
-    
-  if(U_FAILURE(*status)) {
-    return;
-  }
-#if UPLUG_TRACE
-  DBG((stderr,  "uplug_loadWaitingPlugs() Level: %d\n", currentLevel));
-#endif
-  /* pass #1: low level plugs */
-  for(i=0;i<pluginCount;i++) {
-    UErrorCode subStatus = U_ZERO_ERROR;
-    UPlugData *pluginToLoad = &pluginList[i];
-    if(pluginToLoad->awaitingLoad) {
-      if(pluginToLoad->level == UPLUG_LEVEL_LOW) {
-        if(currentLevel > UPLUG_LEVEL_LOW) {
-          pluginToLoad->pluginStatus = U_PLUGIN_TOO_HIGH;
-        } else {
-          UPlugLevel newLevel;
-          uplug_loadPlug(pluginToLoad, &subStatus);
-          newLevel = uplug_getCurrentLevel();
-          if(newLevel > currentLevel) {
-            pluginToLoad->pluginStatus = U_PLUGIN_CHANGED_LEVEL_WARNING;
-            currentLevel = newLevel;
-          }
-        }
-        pluginToLoad->awaitingLoad = FALSE;
-      } 
-    }
-  }    
-  for(i=0;i<pluginCount;i++) {
-    UErrorCode subStatus = U_ZERO_ERROR;
-    UPlugData *pluginToLoad = &pluginList[i];
-        
-    if(pluginToLoad->awaitingLoad) {
-      if(pluginToLoad->level == UPLUG_LEVEL_INVALID) { 
-        pluginToLoad->pluginStatus = U_PLUGIN_DIDNT_SET_LEVEL;
-      } else if(pluginToLoad->level == UPLUG_LEVEL_UNKNOWN) {
-        pluginToLoad->pluginStatus = U_INTERNAL_PROGRAM_ERROR;
-      } else {
-        uplug_loadPlug(pluginToLoad, &subStatus);
-      }
-      pluginToLoad->awaitingLoad = FALSE;
-    }
-  }
-    
-#if UPLUG_TRACE
-  DBG((stderr,  " Done Loading Plugs. Level: %d\n", (int32_t)uplug_getCurrentLevel()));
-#endif
-}
-
-/* Name of the plugin config file */
-static char plugin_file[2048] = "";
-#endif
-
-U_INTERNAL const char* U_EXPORT2
-uplug_getPluginFile() {
-#if U_ENABLE_DYLOAD
-  return plugin_file;
-#else
-  return NULL;
-#endif
-}
-
-
-U_CAPI void U_EXPORT2
-uplug_init(UErrorCode *status) {
-#if !U_ENABLE_DYLOAD
-  (void)status; /* unused */
-#else
-  const char *plugin_dir;
-
-  if(U_FAILURE(*status)) return;
-  plugin_dir = getenv("ICU_PLUGINS");
-
-#if defined(DEFAULT_ICU_PLUGINS) 
-  if(plugin_dir == NULL || !*plugin_dir) {
-    plugin_dir = DEFAULT_ICU_PLUGINS;
-  }
-#endif
-
-#if UPLUG_TRACE
-  DBG((stderr, "ICU_PLUGINS=%s\n", plugin_dir));
-#endif
-
-  if(plugin_dir != NULL && *plugin_dir) {
-    FILE *f;
-        
-        
-#ifdef OS390BATCH
-/* There are potentially a lot of ways to implement a plugin directory on OS390/zOS  */
-/* Keeping in mind that unauthorized file access is logged, monitored, and enforced  */
-/* I've chosen to open a DDNAME if BATCH and leave it alone for (presumably) UNIX    */
-/* System Services.  Alternative techniques might be allocating a member in          */
-/* SYS1.PARMLIB or setting an environment variable "ICU_PLUGIN_PATH" (?).  The       */
-/* DDNAME can be connected to a file in the HFS if need be.                          */
-
-    uprv_strncpy(plugin_file,"//DD:ICUPLUG", 2047);        /* JAM 20 Oct 2011 */
-#else
-    uprv_strncpy(plugin_file, plugin_dir, 2047);
-    uprv_strncat(plugin_file, U_FILE_SEP_STRING,2047);
-    uprv_strncat(plugin_file, "icuplugins",2047);
-    uprv_strncat(plugin_file, U_ICU_VERSION_SHORT ,2047);
-    uprv_strncat(plugin_file, ".txt" ,2047);
-#endif
-        
-#if UPLUG_TRACE
-    DBG((stderr, "pluginfile= %s\n", plugin_file));
-#endif
-        
-#ifdef __MVS__
-    if (iscics()) /* 12 Nov 2011 JAM */
-    {
-        f = NULL;
-    }
-    else
-#endif
-    {
-         f = fopen(plugin_file, "r");
-    }
-
-    if(f != NULL) {
-      char linebuf[1024];
-      char *p, *libName=NULL, *symName=NULL, *config=NULL;
-      int32_t line = 0;
-            
-            
-      while(fgets(linebuf,1023,f)) {
-        line++;
-
-        if(!*linebuf || *linebuf=='#') {
-          continue;
-        } else {
-          p = linebuf;
-          while(*p&&isspace((int)*p))
-            p++;
-          if(!*p || *p=='#') continue;
-          libName = p;
-          while(*p&&!isspace((int)*p)) {
-            p++;
-          }
-          if(!*p || *p=='#') continue; /* no tab after libname */
-          *p=0; /* end of libname */
-          p++;
-          while(*p&&isspace((int)*p)) {
-            p++;
-          }
-          if(!*p||*p=='#') continue; /* no symname after libname +tab */
-          symName = p;
-          while(*p&&!isspace((int)*p)) {
-            p++;
-          }
-                    
-          if(*p) { /* has config */
-            *p=0;
-            ++p;
-            while(*p&&isspace((int)*p)) {
-              p++;
-            }
-            if(*p) {
-              config = p;
-            }
-          }
-                    
-          /* chop whitespace at the end of the config */
-          if(config!=NULL&&*config!=0) {
-            p = config+strlen(config);
-            while(p>config&&isspace((int)*(--p))) {
-              *p=0;
-            }
-          }
-                
-          /* OK, we're good. */
-          { 
-            UErrorCode subStatus = U_ZERO_ERROR;
-            UPlugData *plug = uplug_initPlugFromLibrary(libName, symName, config, &subStatus);
-            if(U_FAILURE(subStatus) && U_SUCCESS(*status)) {
-              *status = subStatus;
-            }
-#if UPLUG_TRACE
-            DBG((stderr, "PLUGIN libName=[%s], sym=[%s], config=[%s]\n", libName, symName, config));
-            DBG((stderr, " -> %p, %s\n", (void*)plug, u_errorName(subStatus)));
-#else
-            (void)plug; /* unused */
-#endif
-          }
-        }
-      }
-      fclose(f);
-    } else {
-#if UPLUG_TRACE
-      DBG((stderr, "Can't open plugin file %s\n", plugin_file));
-#endif
-    }
-  }
-  uplug_loadWaitingPlugs(status);
-#endif /* U_ENABLE_DYLOAD */
-  ucln_registerCleanup(UCLN_UPLUG, uplug_cleanup);
-}