From a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sat, 27 Aug 2022 23:52:56 -0500
Subject: add plibsys

---
 3rdparty/plibsys/src/plibraryloader-shl.c | 140 ++++++++++++++++++++++++++++++
 1 file changed, 140 insertions(+)
 create mode 100644 3rdparty/plibsys/src/plibraryloader-shl.c

(limited to '3rdparty/plibsys/src/plibraryloader-shl.c')

diff --git a/3rdparty/plibsys/src/plibraryloader-shl.c b/3rdparty/plibsys/src/plibraryloader-shl.c
new file mode 100644
index 0000000..8129697
--- /dev/null
+++ b/3rdparty/plibsys/src/plibraryloader-shl.c
@@ -0,0 +1,140 @@
+/*
+ * The MIT License
+ *
+ * Copyright (C) 2017 Alexander Saprykin <saprykin.spb@gmail.com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * 'Software'), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "perror.h"
+#include "pfile.h"
+#include "plibraryloader.h"
+#include "pmem.h"
+#include "pstring.h"
+
+#include <dl.h>
+#include <errno.h>
+#include <string.h>
+
+typedef shl_t plibrary_handle;
+
+struct PLibraryLoader_ {
+	plibrary_handle	handle;
+	int		last_error;
+};
+
+static void pp_library_loader_clean_handle (plibrary_handle handle);
+
+static void
+pp_library_loader_clean_handle (plibrary_handle handle)
+{
+	if (P_UNLIKELY (shl_unload (handle) != 0))
+		P_ERROR ("PLibraryLoader::pp_library_loader_clean_handle: shl_unload() failed");
+}
+
+P_LIB_API PLibraryLoader *
+p_library_loader_new (const pchar *path)
+{
+	PLibraryLoader	*loader = NULL;
+	plibrary_handle	handle;
+
+	if (!p_file_is_exists (path))
+		return NULL;
+
+	if (P_UNLIKELY ((handle = shl_load (path, BIND_IMMEDIATE | BIND_NONFATAL | DYNAMIC_PATH, 0)) == NULL)) {
+		P_ERROR ("PLibraryLoader::p_library_loader_new: shl_load() failed");
+		return NULL;
+	}
+
+	if (P_UNLIKELY ((loader = p_malloc0 (sizeof (PLibraryLoader))) == NULL)) {
+		P_ERROR ("PLibraryLoader::p_library_loader_new: failed to allocate memory");
+		pp_library_loader_clean_handle (handle);
+		return NULL;
+	}
+
+	loader->handle     = handle;
+	loader->last_error = 0;
+
+	return loader;
+}
+
+P_LIB_API PFuncAddr
+p_library_loader_get_symbol (PLibraryLoader *loader, const pchar *sym)
+{
+	PFuncAddr func_addr = NULL;
+
+	if (P_UNLIKELY (loader == NULL || sym == NULL || loader->handle == NULL))
+		return NULL;
+
+	if (P_UNLIKELY (shl_findsym (&loader->handle, sym, TYPE_UNDEFINED, (ppointer) &func_addr) != 0)) {
+		P_ERROR ("PLibraryLoader::p_library_loader_get_symbol: shl_findsym() failed");
+		loader->last_error = (errno == 0 ? -1 : errno);
+		return NULL;
+	}
+
+	loader->last_error = 0;
+
+	return func_addr;
+}
+
+P_LIB_API void
+p_library_loader_free (PLibraryLoader *loader)
+{
+	if (P_UNLIKELY (loader == NULL))
+		return;
+
+	pp_library_loader_clean_handle (loader->handle);
+
+	p_free (loader);
+}
+
+P_LIB_API pchar *
+p_library_loader_get_last_error (PLibraryLoader *loader)
+{
+	if (loader == NULL)
+		return NULL;
+
+	if (loader->last_error == 0)
+		return NULL;
+	else if (loader->last_error == -1)
+		return p_strdup ("Failed to find a symbol");
+	else
+		return p_strdup (strerror (loader->last_error));
+}
+
+P_LIB_API pboolean
+p_library_loader_is_ref_counted (void)
+{
+#if defined (P_OS_HPUX) && defined (P_CPU_HPPA) && (PLIBSYS_SIZEOF_VOID_P == 4)
+	return FALSE;
+#else
+	return TRUE;
+#endif
+}
+
+void
+p_library_loader_init (void)
+{
+}
+
+void
+p_library_loader_shutdown (void)
+{
+}
-- 
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