auto import from //depot/cupcake/@135843

1 files changed, 127 insertions, 0 deletions

diff --git a/crypto/LPdir_unix.c b/crypto/LPdir_unix.c
new file mode 100644
index 0000000..b004cd9
--- /dev/null
+++ b/crypto/LPdir_unix.c
@@ -0,0 +1,127 @@
+/* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $ */
+/*
+ * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stddef.h>
+#include <stdlib.h>
+#include <limits.h>
+#include <string.h>
+#include <sys/types.h>
+#include <dirent.h>
+#include <errno.h>
+#ifndef LPDIR_H
+#include "LPdir.h"
+#endif
+
+/* The POSIXly macro for the maximum number of characters in a file path
+   is NAME_MAX.  However, some operating systems use PATH_MAX instead.
+   Therefore, it seems natural to first check for PATH_MAX and use that,
+   and if it doesn't exist, use NAME_MAX. */
+#if defined(PATH_MAX)
+# define LP_ENTRY_SIZE PATH_MAX
+#elif defined(NAME_MAX)
+# define LP_ENTRY_SIZE NAME_MAX
+#endif
+
+/* Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
+   exist.  It's also possible that NAME_MAX exists but is define to a
+   very small value (HP-UX offers 14), so we need to check if we got a
+   result, and if it meets a minimum standard, and create or change it
+   if not. */
+#if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
+# undef LP_ENTRY_SIZE
+# define LP_ENTRY_SIZE 255
+#endif
+
+struct LP_dir_context_st
+{
+  DIR *dir;
+  char entry_name[LP_ENTRY_SIZE+1];
+};
+
+const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
+{
+  struct dirent *direntry = NULL;
+
+  if (ctx == NULL || directory == NULL)
+    {
+      errno = EINVAL;
+      return 0;
+    }
+
+  errno = 0;
+  if (*ctx == NULL)
+    {
+      *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
+      if (*ctx == NULL)
+	{
+	  errno = ENOMEM;
+	  return 0;
+	}
+      memset(*ctx, '\0', sizeof(LP_DIR_CTX));
+
+      (*ctx)->dir = opendir(directory);
+      if ((*ctx)->dir == NULL)
+	{
+	  int save_errno = errno; /* Probably not needed, but I'm paranoid */
+	  free(*ctx);
+	  *ctx = NULL;
+	  errno = save_errno;
+	  return 0;
+	}
+    }
+
+  direntry = readdir((*ctx)->dir);
+  if (direntry == NULL)
+    {
+      return 0;
+    }
+
+  strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name) - 1);
+  (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
+  return (*ctx)->entry_name;
+}
+
+int LP_find_file_end(LP_DIR_CTX **ctx)
+{
+  if (ctx != NULL && *ctx != NULL)
+    {
+      int ret = closedir((*ctx)->dir);
+
+      free(*ctx);
+      switch (ret)
+	{
+	case 0:
+	  return 1;
+	case -1:
+	  return 0;
+	default:
+	  break;
+	}
+    }
+  errno = EINVAL;
+  return 0;
+}