Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 336 insertions, 0 deletions

diff --git a/REORG.TODO/catgets/open_catalog.c b/REORG.TODO/catgets/open_catalog.c
new file mode 100644
index 0000000000..cbb305a3f7
--- /dev/null
+++ b/REORG.TODO/catgets/open_catalog.c
@@ -0,0 +1,336 @@
+/* Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper, <drepper@gnu.org>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <byteswap.h>
+#include <endian.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#ifdef _POSIX_MAPPED_FILES
+# include <sys/mman.h>
+#endif
+#include <sys/stat.h>
+
+#include "catgetsinfo.h"
+#include <not-cancel.h>
+
+
+#define SWAPU32(w) bswap_32 (w)
+
+
+int
+__open_catalog (const char *cat_name, const char *nlspath, const char *env_var,
+		__nl_catd catalog)
+{
+  int fd = -1;
+  struct stat64 st;
+  int swapping;
+  size_t cnt;
+  size_t max_offset;
+  size_t tab_size;
+  const char *lastp;
+  int result = -1;
+  char *buf = NULL;
+
+  if (strchr (cat_name, '/') != NULL || nlspath == NULL)
+    fd = open_not_cancel_2 (cat_name, O_RDONLY);
+  else
+    {
+      const char *run_nlspath = nlspath;
+#define ENOUGH(n)							      \
+  if (__glibc_unlikely (bufact + (n) >= bufmax))			      \
+    {									      \
+      char *old_buf = buf;						      \
+      bufmax += (bufmax < 256 + (n)) ? 256 + (n) : bufmax;		      \
+      buf = realloc (buf, bufmax);					      \
+      if (__glibc_unlikely (buf == NULL))				      \
+	{								      \
+	  free (old_buf);						      \
+	  return -1;							      \
+	}								      \
+    }
+
+      /* The RUN_NLSPATH variable contains a colon separated list of
+	 descriptions where we expect to find catalogs.  We have to
+	 recognize certain % substitutions and stop when we found the
+	 first existing file.  */
+      size_t bufact;
+      size_t bufmax = 0;
+      size_t len;
+
+      fd = -1;
+      while (*run_nlspath != '\0')
+	{
+	  bufact = 0;
+
+	  if (*run_nlspath == ':')
+	    {
+	      /* Leading colon or adjacent colons - treat same as %N.  */
+	      len = strlen (cat_name);
+	      ENOUGH (len);
+	      memcpy (&buf[bufact], cat_name, len);
+	      bufact += len;
+	    }
+	  else
+	    while (*run_nlspath != ':' && *run_nlspath != '\0')
+	      if (*run_nlspath == '%')
+		{
+		  const char *tmp;
+
+		  ++run_nlspath;	/* We have seen the `%'.  */
+		  switch (*run_nlspath++)
+		    {
+		    case 'N':
+		      /* Use the catalog name.  */
+		      len = strlen (cat_name);
+		      ENOUGH (len);
+		      memcpy (&buf[bufact], cat_name, len);
+		      bufact += len;
+		      break;
+		    case 'L':
+		      /* Use the current locale category value.  */
+		      len = strlen (env_var);
+		      ENOUGH (len);
+		      memcpy (&buf[bufact], env_var, len);
+		      bufact += len;
+		      break;
+		    case 'l':
+		      /* Use language element of locale category value.  */
+		      tmp = env_var;
+		      do
+			{
+			  ENOUGH (1);
+			  buf[bufact++] = *tmp++;
+			}
+		      while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
+		      break;
+		    case 't':
+		      /* Use territory element of locale category value.  */
+		      tmp = env_var;
+		      do
+			++tmp;
+		      while (*tmp != '\0' && *tmp != '_' && *tmp != '.');
+		      if (*tmp == '_')
+			{
+			  ++tmp;
+			  do
+			    {
+			      ENOUGH (1);
+			      buf[bufact++] = *tmp++;
+			    }
+			  while (*tmp != '\0' && *tmp != '.');
+			}
+		      break;
+		    case 'c':
+		      /* Use code set element of locale category value.  */
+		      tmp = env_var;
+		      do
+			++tmp;
+		      while (*tmp != '\0' && *tmp != '.');
+		      if (*tmp == '.')
+			{
+			  ++tmp;
+			  do
+			    {
+			      ENOUGH (1);
+			      buf[bufact++] = *tmp++;
+			    }
+			  while (*tmp != '\0');
+			}
+		      break;
+		    case '%':
+		      ENOUGH (1);
+		      buf[bufact++] = '%';
+		      break;
+		    default:
+		      /* Unknown variable: ignore this path element.  */
+		      bufact = 0;
+		      while (*run_nlspath != '\0' && *run_nlspath != ':')
+			++run_nlspath;
+		      break;
+		    }
+		}
+	      else
+		{
+		  ENOUGH (1);
+		  buf[bufact++] = *run_nlspath++;
+		}
+
+	  ENOUGH (1);
+	  buf[bufact] = '\0';
+
+	  if (bufact != 0)
+	    {
+	      fd = open_not_cancel_2 (buf, O_RDONLY);
+	      if (fd >= 0)
+		break;
+	    }
+
+	  ++run_nlspath;
+	}
+    }
+
+  /* Avoid dealing with directories and block devices */
+  if (__builtin_expect (fd, 0) < 0)
+    {
+      free (buf);
+      return -1;
+    }
+
+  if (__builtin_expect (__fxstat64 (_STAT_VER, fd, &st), 0) < 0)
+    goto close_unlock_return;
+
+  if (__builtin_expect (!S_ISREG (st.st_mode), 0)
+      || (size_t) st.st_size < sizeof (struct catalog_obj))
+    {
+      /* `errno' is not set correctly but the file is not usable.
+	 Use an reasonable error value.  */
+      __set_errno (EINVAL);
+      goto close_unlock_return;
+    }
+
+  catalog->file_size = st.st_size;
+#ifdef _POSIX_MAPPED_FILES
+# ifndef MAP_COPY
+    /* Linux seems to lack read-only copy-on-write.  */
+#  define MAP_COPY MAP_PRIVATE
+# endif
+# ifndef MAP_FILE
+    /* Some systems do not have this flag; it is superfluous.  */
+#  define MAP_FILE 0
+# endif
+  catalog->file_ptr =
+    (struct catalog_obj *) __mmap (NULL, st.st_size, PROT_READ,
+				   MAP_FILE|MAP_COPY, fd, 0);
+  if (__builtin_expect (catalog->file_ptr != (struct catalog_obj *) MAP_FAILED,
+			1))
+    /* Tell the world we managed to mmap the file.  */
+    catalog->status = mmapped;
+  else
+#endif /* _POSIX_MAPPED_FILES */
+    {
+      /* mmap failed perhaps because the system call is not
+	 implemented.  Try to load the file.  */
+      size_t todo;
+      catalog->file_ptr = malloc (st.st_size);
+      if (catalog->file_ptr == NULL)
+	goto close_unlock_return;
+
+      todo = st.st_size;
+      /* Save read, handle partial reads.  */
+      do
+	{
+	  size_t now = read_not_cancel (fd, (((char *) catalog->file_ptr)
+					     + (st.st_size - todo)), todo);
+	  if (now == 0 || now == (size_t) -1)
+	    {
+#ifdef EINTR
+	      if (now == (size_t) -1 && errno == EINTR)
+		continue;
+#endif
+	      free ((void *) catalog->file_ptr);
+	      goto close_unlock_return;
+	    }
+	  todo -= now;
+	}
+      while (todo > 0);
+      catalog->status = malloced;
+    }
+
+  /* Determine whether the file is a catalog file and if yes whether
+     it is written using the correct byte order.  Else we have to swap
+     the values.  */
+  if (__glibc_likely (catalog->file_ptr->magic == CATGETS_MAGIC))
+    swapping = 0;
+  else if (catalog->file_ptr->magic == SWAPU32 (CATGETS_MAGIC))
+    swapping = 1;
+  else
+    {
+    invalid_file:
+      /* Invalid file.  Free the resources and mark catalog as not
+	 usable.  */
+#ifdef _POSIX_MAPPED_FILES
+      if (catalog->status == mmapped)
+	__munmap ((void *) catalog->file_ptr, catalog->file_size);
+      else
+#endif	/* _POSIX_MAPPED_FILES */
+	free (catalog->file_ptr);
+      goto close_unlock_return;
+    }
+
+#define SWAP(x) (swapping ? SWAPU32 (x) : (x))
+
+  /* Get dimensions of the used hashing table.  */
+  catalog->plane_size = SWAP (catalog->file_ptr->plane_size);
+  catalog->plane_depth = SWAP (catalog->file_ptr->plane_depth);
+
+  /* The file contains two versions of the pointer tables.  Pick the
+     right one for the local byte order.  */
+#if __BYTE_ORDER == __LITTLE_ENDIAN
+  catalog->name_ptr = &catalog->file_ptr->name_ptr[0];
+#elif __BYTE_ORDER == __BIG_ENDIAN
+  catalog->name_ptr = &catalog->file_ptr->name_ptr[catalog->plane_size
+						  * catalog->plane_depth
+						  * 3];
+#else
+# error Cannot handle __BYTE_ORDER byte order
+#endif
+
+  /* The rest of the file contains all the strings.  They are
+     addressed relative to the position of the first string.  */
+  catalog->strings =
+    (const char *) &catalog->file_ptr->name_ptr[catalog->plane_size
+					       * catalog->plane_depth * 3 * 2];
+
+  /* Determine the largest string offset mentioned in the table.  */
+  max_offset = 0;
+  tab_size = 3 * catalog->plane_size * catalog->plane_depth;
+  for (cnt = 2; cnt < tab_size; cnt += 3)
+    if (catalog->name_ptr[cnt] > max_offset)
+      max_offset = catalog->name_ptr[cnt];
+
+  /* Now we can check whether the file is large enough to contain the
+     tables it says it contains.  */
+  if ((size_t) st.st_size
+      <= (sizeof (struct catalog_obj) + 2 * tab_size + max_offset))
+    /* The last string is not contained in the file.  */
+    goto invalid_file;
+
+  lastp = catalog->strings + max_offset;
+  max_offset = (st.st_size
+		- sizeof (struct catalog_obj) + 2 * tab_size + max_offset);
+  while (*lastp != '\0')
+    {
+      if (--max_offset == 0)
+	goto invalid_file;
+      ++lastp;
+    }
+
+  /* We succeeded.  */
+  result = 0;
+
+  /* Release the lock again.  */
+ close_unlock_return:
+  close_not_cancel_no_status (fd);
+  free (buf);
+
+  return result;
+}
+libc_hidden_def (__open_catalog)