+/*
+******************************************************************************
+*
+* Copyright (C) 2009-2010, 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>
+
+#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;
+}
+
+
+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.
+ */
+
+#if U_ENABLE_DYLOAD
+
+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;
+ /*
+ * ISO forbids the following cast.
+ * See: http://www.trilithium.com/johan/2004/12/problem-with-dlsym/
+ */
+ entrypoint = (UPlugEntrypoint*)uprv_dl_sym(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;
+}
+
+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;
+ }
+ }
+ }
+ currentLevel = uplug_getCurrentLevel();
+
+ 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
+}
+
+#if U_ENABLE_DYLOAD
+/* 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;
+
+
+ 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);
+
+#if UPLUG_TRACE
+ DBG((stderr, "pluginfile= %s\n", plugin_file));
+#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(*p))
+ p++;
+ if(!*p || *p=='#') continue;
+ libName = p;
+ while(*p&&!isspace(*p)) {
+ p++;
+ }
+ if(!*p || *p=='#') continue; /* no tab after libname */
+ *p=0; /* end of libname */
+ p++;
+ while(*p&&isspace(*p)) {
+ p++;
+ }
+ if(!*p||*p=='#') continue; /* no symname after libname +tab */
+ symName = p;
+ while(*p&&!isspace(*p)) {
+ p++;
+ }
+
+ if(*p) { /* has config */
+ *p=0;
+ ++p;
+ while(*p&&isspace(*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(*(--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
+ }
+ }
+ }
+ } 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);
+}
projects / apple / icu.git / blobdiff