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+/*
+ * "$Id: mxml-private.c 422 2010-11-07 22:55:11Z mike $"
+ *
+ * Private functions for Mini-XML, a small XML-like file parsing library.
+ *
+ * Copyright 2003-2010 by Michael R Sweet.
+ *
+ * These coded instructions, statements, and computer programs are the
+ * property of Michael R Sweet and are protected by Federal copyright
+ * law. Distribution and use rights are outlined in the file "COPYING"
+ * which should have been included with this file. If this file is
+ * missing or damaged, see the license at:
+ *
+ * http://www.minixml.org/
+ *
+ * Contents:
+ *
+ * mxml_error() - Display an error message.
+ * mxml_integer_cb() - Default callback for integer values.
+ * mxml_opaque_cb() - Default callback for opaque values.
+ * mxml_real_cb() - Default callback for real number values.
+ * _mxml_global() - Get global data.
+ */
+
+/*
+ * Include necessary headers...
+ */
+
+#include "mxml-private.h"
+
+
+/*
+ * Some crazy people think that unloading a shared object is a good or safe
+ * thing to do. Unfortunately, most objects are simply *not* safe to unload
+ * and bad things *will* happen.
+ *
+ * The following mess of conditional code allows us to provide a destructor
+ * function in Mini-XML for our thread-global storage so that it can possibly
+ * be unloaded safely, although since there is no standard way to do so I
+ * can't even provide any guarantees that you can do it safely on all platforms.
+ *
+ * This code currently supports AIX, HP-UX, Linux, Mac OS X, Solaris, and
+ * Windows. It might work on the BSDs and IRIX, but I haven't tested that.
+ */
+
+#if defined(__sun) || defined(_AIX)
+# pragma fini(_mxml_fini)
+# define _MXML_FINI _mxml_fini
+#elif defined(__hpux)
+# pragma FINI _mxml_fini
+# define _MXML_FINI _mxml_fini
+#elif defined(__GNUC__) /* Linux and Mac OS X */
+# define _MXML_FINI __attribute((destructor)) _mxml_fini
+#else
+# define _MXML_FINI _fini
+#endif /* __sun */
+
+
+/*
+ * 'mxml_error()' - Display an error message.
+ */
+
+void
+mxml_error(const char *format, /* I - Printf-style format string */
+ ...) /* I - Additional arguments as needed */
+{
+ va_list ap; /* Pointer to arguments */
+ char s[1024]; /* Message string */
+ _mxml_global_t *global = _mxml_global();
+ /* Global data */
+
+
+ /*
+ * Range check input...
+ */
+
+ if (!format)
+ return;
+
+ /*
+ * Format the error message string...
+ */
+
+ va_start(ap, format);
+
+ vsnprintf(s, sizeof(s), format, ap);
+
+ va_end(ap);
+
+ /*
+ * And then display the error message...
+ */
+
+ if (global->error_cb)
+ (*global->error_cb)(s);
+ else
+ fprintf(stderr, "mxml: %s\n", s);
+}
+
+
+/*
+ * 'mxml_ignore_cb()' - Default callback for ignored values.
+ */
+
+mxml_type_t /* O - Node type */
+mxml_ignore_cb(mxml_node_t *node) /* I - Current node */
+{
+ (void)node;
+
+ return (MXML_IGNORE);
+}
+
+
+/*
+ * 'mxml_integer_cb()' - Default callback for integer values.
+ */
+
+mxml_type_t /* O - Node type */
+mxml_integer_cb(mxml_node_t *node) /* I - Current node */
+{
+ (void)node;
+
+ return (MXML_INTEGER);
+}
+
+
+/*
+ * 'mxml_opaque_cb()' - Default callback for opaque values.
+ */
+
+mxml_type_t /* O - Node type */
+mxml_opaque_cb(mxml_node_t *node) /* I - Current node */
+{
+ (void)node;
+
+ return (MXML_OPAQUE);
+}
+
+
+/*
+ * 'mxml_real_cb()' - Default callback for real number values.
+ */
+
+mxml_type_t /* O - Node type */
+mxml_real_cb(mxml_node_t *node) /* I - Current node */
+{
+ (void)node;
+
+ return (MXML_REAL);
+}
+
+
+#ifdef HAVE_PTHREAD_H /**** POSIX threading ****/
+# include <pthread.h>
+
+static pthread_key_t _mxml_key = -1; /* Thread local storage key */
+static pthread_once_t _mxml_key_once = PTHREAD_ONCE_INIT;
+ /* One-time initialization object */
+static void _mxml_init(void);
+static void _mxml_destructor(void *g);
+
+
+/*
+ * '_mxml_destructor()' - Free memory used for globals...
+ */
+
+static void
+_mxml_destructor(void *g) /* I - Global data */
+{
+ free(g);
+}
+
+
+/*
+ * '_mxml_fini()' - Clean up when unloaded.
+ */
+
+static void
+_MXML_FINI(void)
+{
+ _mxml_global_t *global; /* Global data */
+
+
+ if (_mxml_key != -1)
+ {
+ if ((global = (_mxml_global_t *)pthread_getspecific(_mxml_key)) != NULL)
+ _mxml_destructor(global);
+
+ pthread_key_delete(_mxml_key);
+ _mxml_key = -1;
+ }
+}
+
+
+/*
+ * '_mxml_global()' - Get global data.
+ */
+
+_mxml_global_t * /* O - Global data */
+_mxml_global(void)
+{
+ _mxml_global_t *global; /* Global data */
+
+
+ pthread_once(&_mxml_key_once, _mxml_init);
+
+ if ((global = (_mxml_global_t *)pthread_getspecific(_mxml_key)) == NULL)
+ {
+ global = (_mxml_global_t *)calloc(1, sizeof(_mxml_global_t));
+ pthread_setspecific(_mxml_key, global);
+
+ global->num_entity_cbs = 1;
+ global->entity_cbs[0] = _mxml_entity_cb;
+ global->wrap = 72;
+ }
+
+ return (global);
+}
+
+
+/*
+ * '_mxml_init()' - Initialize global data...
+ */
+
+static void
+_mxml_init(void)
+{
+ pthread_key_create(&_mxml_key, _mxml_destructor);
+}
+
+
+#elif defined(WIN32) && defined(MXML1_EXPORTS) /**** WIN32 threading ****/
+# include <windows.h>
+
+static DWORD _mxml_tls_index; /* Index for global storage */
+
+
+/*
+ * 'DllMain()' - Main entry for library.
+ */
+
+BOOL WINAPI /* O - Success/failure */
+DllMain(HINSTANCE hinst, /* I - DLL module handle */
+ DWORD reason, /* I - Reason */
+ LPVOID reserved) /* I - Unused */
+{
+ _mxml_global_t *global; /* Global data */
+
+
+ (void)hinst;
+ (void)reserved;
+
+ switch (reason)
+ {
+ case DLL_PROCESS_ATTACH : /* Called on library initialization */
+ if ((_mxml_tls_index = TlsAlloc()) == TLS_OUT_OF_INDEXES)
+ return (FALSE);
+ break;
+
+ case DLL_THREAD_DETACH : /* Called when a thread terminates */
+ if ((global = (_mxml_global_t *)TlsGetValue(_mxml_tls_index)) != NULL)
+ free(global);
+ break;
+
+ case DLL_PROCESS_DETACH : /* Called when library is unloaded */
+ if ((global = (_mxml_global_t *)TlsGetValue(_mxml_tls_index)) != NULL)
+ free(global);
+
+ TlsFree(_mxml_tls_index);
+ break;
+
+ default:
+ break;
+ }
+
+ return (TRUE);
+}
+
+
+/*
+ * '_mxml_global()' - Get global data.
+ */
+
+_mxml_global_t * /* O - Global data */
+_mxml_global(void)
+{
+ _mxml_global_t *global; /* Global data */
+
+
+ if ((global = (_mxml_global_t *)TlsGetValue(_mxml_tls_index)) == NULL)
+ {
+ global = (_mxml_global_t *)calloc(1, sizeof(_mxml_global_t));
+
+ global->num_entity_cbs = 1;
+ global->entity_cbs[0] = _mxml_entity_cb;
+ global->wrap = 72;
+
+ TlsSetValue(_mxml_tls_index, (LPVOID)global);
+ }
+
+ return (global);
+}
+
+
+#else /**** No threading ****/
+/*
+ * '_mxml_global()' - Get global data.
+ */
+
+_mxml_global_t * /* O - Global data */
+_mxml_global(void)
+{
+ static _mxml_global_t global = /* Global data */
+ {
+ NULL, /* error_cb */
+ 1, /* num_entity_cbs */
+ { _mxml_entity_cb }, /* entity_cbs */
+ 72, /* wrap */
+ NULL, /* custom_load_cb */
+ NULL /* custom_save_cb */
+ };
+
+
+ return (&global);
+}
+#endif /* HAVE_PTHREAD_H */
+
+
+/*
+ * End of "$Id: mxml-private.c 422 2010-11-07 22:55:11Z mike $".
+ */
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