The Tor Browser: intl/icu/source/common/icuplug.c@fc2d59ddac77 (annotated)

intl/icu/source/common/icuplug.c@fc2d59ddac77 (annotated)

intl/icu/source/common/icuplug.c

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
 ******************************************************************************
 *
 *   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);
 }

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intl/icu/source/common/icuplug.c@fc2d59ddac77 (annotated)

intl/icu/source/common/icuplug.c