summaryrefslogtreecommitdiff
path: root/xmlmodule.c
diff options
context:
space:
mode:
authorMike Hommey <mh@glandium.org>2005-02-05 12:06:19 +0000
committerMike Hommey <mh@glandium.org>2005-02-05 12:06:19 +0000
commita7457388701e6ccba9091ba3ec09505dc903b758 (patch)
tree80a7d0fba3968fee73cc71a62ffe1af039396f29 /xmlmodule.c
parentf51dd67f3a3f472af0620391eb588eeca4533689 (diff)
downloadlibxml2-a7457388701e6ccba9091ba3ec09505dc903b758.tar.gz
Load /tmp/tmp.5kkLmZ/libxml2-2.6.17 intoupstream/2.6.17
packages/libxml2/branches/upstream/current.
Diffstat (limited to 'xmlmodule.c')
-rw-r--r--xmlmodule.c441
1 files changed, 441 insertions, 0 deletions
diff --git a/xmlmodule.c b/xmlmodule.c
new file mode 100644
index 0000000..fcd4c33
--- /dev/null
+++ b/xmlmodule.c
@@ -0,0 +1,441 @@
+/*
+ * xmlmodule.c : basic API for dynamic module loading added 2.6.17
+ *
+ * See Copyright for the status of this software.
+ *
+ * joelwreed@comcast.net
+ *
+ * http://www.fortran-2000.com/ArnaudRecipes/sharedlib.html
+ */
+
+#define IN_LIBXML
+#include "libxml.h"
+
+#include <string.h>
+#include <libxml/xmlmemory.h>
+#include <libxml/xmlerror.h>
+#include <libxml/xmlmodule.h>
+#include <libxml/globals.h>
+
+#ifdef LIBXML_MODULES_ENABLED
+
+struct _xmlModule {
+ unsigned char *name;
+ void *handle;
+};
+
+static void *xmlModulePlatformOpen(const char *name);
+static int xmlModulePlatformClose(void *handle);
+static int xmlModulePlatformSymbol(void *handle, const char *name, void **result);
+
+/************************************************************************
+ * *
+ * module memory error handler *
+ * *
+ ************************************************************************/
+
+/**
+ * xmlModuleErrMemory:
+ * @extra: extra information
+ *
+ * Handle an out of memory condition
+ */
+static void
+xmlModuleErrMemory(xmlModulePtr module, const char *extra)
+{
+ const char *name = NULL;
+
+ if (module != NULL) {
+ name = (const char *) module->name;
+ }
+
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_ERR_NO_MEMORY, XML_ERR_FATAL, NULL, 0, extra,
+ name, NULL, 0, 0,
+ "Memory allocation failed : %s\n", extra);
+}
+
+/**
+ * xmlModuleOpen:
+ * @name: the module name
+ * @options: a set of xmlModuleOption
+ *
+ * Opens a module/shared library given its name or path
+ * TODO: options are not yet implemented.
+ *
+ * Returns a handle for the module or NULL in case of error
+ */
+xmlModulePtr
+xmlModuleOpen(const char *name, int options ATTRIBUTE_UNUSED)
+{
+ xmlModulePtr module;
+
+ module = (xmlModulePtr) xmlMalloc(sizeof(xmlModule));
+ if (module == NULL) {
+ xmlModuleErrMemory(NULL, "creating module");
+ return (NULL);
+ }
+
+ memset(module, 0, sizeof(xmlModule));
+
+ module->handle = xmlModulePlatformOpen(name);
+
+ if (module->handle == NULL) {
+ xmlFree(module);
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_OPEN, XML_ERR_FATAL, NULL, 0, 0,
+ name, NULL, 0, 0, "failed to open %s\n", name);
+ return 0;
+ }
+
+ module->name = xmlStrdup((const xmlChar *) name);
+ return (module);
+}
+
+/**
+ * xmlModuleSymbol:
+ * @module: the module
+ * @name: the name of the symbol
+ * @symbol: the resulting symbol address
+ *
+ * Lookup for a symbol address in the given module
+ *
+ * Returns 0 if the symbol was found, or -1 in case of error
+ */
+int
+xmlModuleSymbol(xmlModulePtr module, const char *name, void **symbol)
+{
+ int rc = -1;
+
+ if ((NULL == module) || (symbol == NULL)) {
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_OPEN, XML_ERR_FATAL, NULL, 0, 0,
+ NULL, NULL, 0, 0, "null parameter\n");
+ return rc;
+ }
+
+ rc = xmlModulePlatformSymbol(module->handle, name, symbol);
+
+ if (rc == -1) {
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_OPEN, XML_ERR_FATAL, NULL, 0, 0,
+ name, NULL, 0, 0,
+ "failed to find symbol: %s\n",
+ (name == NULL ? "NULL" : name));
+ return rc;
+ }
+
+ return rc;
+}
+
+/**
+ * xmlModuleClose:
+ * @module: the module handle
+ *
+ * The close operations unload the associated module and free the
+ * data associated to the module.
+ *
+ * Returns 0 in case of success, -1 in case of argument error and -2
+ * if the module could not be closed/unloaded.
+ */
+int
+xmlModuleClose(xmlModulePtr module)
+{
+ int rc;
+
+ if (NULL == module) {
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_CLOSE, XML_ERR_FATAL, NULL, 0, 0,
+ NULL, NULL, 0, 0, "null module pointer\n");
+ return -1;
+ }
+
+ rc = xmlModulePlatformClose(module->handle);
+
+ if (rc != 0) {
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_CLOSE, XML_ERR_FATAL, NULL, 0, 0,
+ (const char *) module->name, NULL, 0, 0,
+ "failed to close: %s\n", module->name);
+ return -2;
+ }
+
+ rc = xmlModuleFree(module);
+ return (rc);
+}
+
+/**
+ * xmlModuleFree:
+ * @module: the module handle
+ *
+ * The free operations free the data associated to the module
+ * but does not unload the associated shared library which may still
+ * be in use.
+ *
+ * Returns 0 in case of success, -1 in case of argument error
+ */
+int
+xmlModuleFree(xmlModulePtr module)
+{
+ if (NULL == module) {
+ __xmlRaiseError(NULL, NULL, NULL, NULL, NULL, XML_FROM_MODULE,
+ XML_MODULE_CLOSE, XML_ERR_FATAL, NULL, 0, 0,
+ NULL, NULL, 0, 0, "null module pointer\n");
+ return -1;
+ }
+
+ xmlFree(module->name);
+ xmlFree(module);
+
+ return (0);
+}
+
+#ifdef HAVE_DLOPEN
+#ifdef HAVE_DLFCN_H
+#include <dlfcn.h>
+#endif
+
+/**
+ * xmlModulePlatformOpen:
+ * @name: path to the module
+ *
+ * returns a handle on success, and zero on error.
+ */
+
+static void *
+xmlModulePlatformOpen(const char *name)
+{
+ return dlopen(name, RTLD_GLOBAL | RTLD_NOW);
+}
+
+/*
+ * xmlModulePlatformClose:
+ * @handle: handle to the module
+ *
+ * returns 0 on success, and non-zero on error.
+ */
+
+static int
+xmlModulePlatformClose(void *handle)
+{
+ return dlclose(handle);
+}
+
+/*
+ * xmlModulePlatformSymbol:
+ * http://www.opengroup.org/onlinepubs/009695399/functions/dlsym.html
+ * returns 0 on success and the loaded symbol in result, and -1 on error.
+ */
+
+static int
+xmlModulePlatformSymbol(void *handle, const char *name, void **symbol)
+{
+ *symbol = dlsym(handle, name);
+ if (dlerror() != NULL) {
+ return -1;
+ }
+ return 0;
+}
+
+#endif /* HAVE_DLOPEN */
+
+#ifdef HAVE_SHLLOAD /* HAVE_SHLLOAD */
+#ifdef HAVE_DL_H
+#include <dl.h>
+#endif
+/*
+ * xmlModulePlatformOpen:
+ * returns a handle on success, and zero on error.
+ */
+
+static void *
+xmlModulePlatformOpen(const char *name)
+{
+ return shl_load(name, BIND_IMMEDIATE, 0L);
+}
+
+/*
+ * xmlModulePlatformClose:
+ * returns 0 on success, and non-zero on error.
+ */
+
+static int
+xmlModulePlatformClose(void *handle)
+{
+ return shl_unload(handle);
+}
+
+/*
+ * xmlModulePlatformSymbol:
+ * http://docs.hp.com/en/B2355-90683/shl_load.3X.html
+ * returns 0 on success and the loaded symbol in result, and -1 on error.
+ */
+
+static int
+xmlModulePlatformSymbol(void *handle, const char *name, void **symbol)
+{
+ int rc;
+
+ errno = 0;
+ rc = shl_findsym(handle, name, TYPE_PROCEDURE, symbol);
+ if ((-1 == rc) && (0 == errno)) {
+ rc = shl_findsym(handle, name, TYPE_DATA, symbol);
+ }
+ return rc;
+}
+
+#endif /* HAVE_SHLLOAD */
+
+#ifdef _WIN32
+
+#include <windows.h>
+
+/*
+ * xmlModulePlatformOpen:
+ * returns a handle on success, and zero on error.
+ */
+
+static void *
+xmlModulePlatformOpen(const char *name)
+{
+ return LoadLibrary(name);
+}
+
+/*
+ * xmlModulePlatformClose:
+ * returns 0 on success, and non-zero on error.
+ */
+
+static int
+xmlModulePlatformClose(void *handle)
+{
+ int rc;
+
+ rc = FreeLibrary(handle);
+ return (0 == rc);
+}
+
+/*
+ * xmlModulePlatformSymbol:
+ * http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/getprocaddress.asp
+ * returns 0 on success and the loaded symbol in result, and -1 on error.
+ */
+
+static int
+xmlModulePlatformSymbol(void *handle, const char *name, void **symbol)
+{
+ *symbol = GetProcAddress(handle, name);
+ return (NULL == *symbol) ? -1 : 0;
+}
+
+#endif /* _WIN32 */
+
+#ifdef HAVE_BEOS
+
+#include <kernel/image.h>
+
+/*
+ * xmlModulePlatformOpen:
+ * beos api info: http://www.beunited.org/bebook/The%20Kernel%20Kit/Images.html
+ * returns a handle on success, and zero on error.
+ */
+
+static void *
+xmlModulePlatformOpen(const char *name)
+{
+ return (void *) load_add_on(name);
+}
+
+/*
+ * xmlModulePlatformClose:
+ * beos api info: http://www.beunited.org/bebook/The%20Kernel%20Kit/Images.html
+ * returns 0 on success, and non-zero on error.
+ */
+
+static int
+xmlModulePlatformClose(void *handle)
+{
+ status_t rc;
+
+ rc = unload_add_on((image_id) handle);
+
+ if (rc == B_OK)
+ return 0;
+ else
+ return -1;
+}
+
+/*
+ * xmlModulePlatformSymbol:
+ * beos api info: http://www.beunited.org/bebook/The%20Kernel%20Kit/Images.html
+ * returns 0 on success and the loaded symbol in result, and -1 on error.
+ */
+
+static int
+xmlModulePlatformSymbol(void *handle, const char *name, void **symbol)
+{
+ status_t rc;
+
+ rc = get_image_symbol((image_id) handle, name, B_SYMBOL_TYPE_ANY, symbol);
+
+ return (rc == B_OK) ? 0 : -1;
+}
+
+#endif /* HAVE_BEOS */
+
+#ifdef HAVE_OS2
+
+#include <os2.h>
+
+/*
+ * xmlModulePlatformOpen:
+ * os2 api info: http://www.edm2.com/os2api/Dos/DosLoadModule.html
+ * returns a handle on success, and zero on error.
+ */
+
+static void *
+xmlModulePlatformOpen(const char *name)
+{
+ char errbuf[256];
+ void *handle;
+ int rc;
+
+ rc = DosLoadModule(errbuf, sizeof(errbuf) - 1, name, &handle);
+
+ if (rc)
+ return 0;
+ else
+ return (handle);
+}
+
+/*
+ * xmlModulePlatformClose:
+ * os2 api info: http://www.edm2.com/os2api/Dos/DosFreeModule.html
+ * returns 0 on success, and non-zero on error.
+ */
+
+static int
+xmlModulePlatformClose(void *handle)
+{
+ return DosFreeModule(handle);
+}
+
+/*
+ * xmlModulePlatformSymbol:
+ * os2 api info: http://www.edm2.com/os2api/Dos/DosQueryProcAddr.html
+ * returns 0 on success and the loaded symbol in result, and -1 on error.
+ */
+
+static int
+xmlModulePlatformSymbol(void *handle, const char *name, void **symbol)
+{
+ int rc;
+
+ rc = DosQueryProcAddr(handle, 0, name, symbol);
+
+ return (rc == NO_ERROR) ? 0 : -1;
+}
+
+#endif /* HAVE_OS2 */
+
+#endif /* LIBXML_MODULES_ENABLED */