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, 335 insertions, 0 deletions

diff --git a/REORG.TODO/nss/nss_files/files-parse.c b/REORG.TODO/nss/nss_files/files-parse.c
new file mode 100644
index 0000000000..b31ff9e17b
--- /dev/null
+++ b/REORG.TODO/nss/nss_files/files-parse.c
@@ -0,0 +1,335 @@
+/* Common code for file-based database parsers in nss_files module.
+   Copyright (C) 1996-2017 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <ctype.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+
+/* These symbols are defined by the including source file:
+
+   ENTNAME -- database name of the structure and functions (hostent, pwent).
+   STRUCTURE -- struct name, define only if not ENTNAME (passwd, group).
+   DATABASE -- string of the database file's name ("hosts", "passwd").
+
+   ENTDATA -- if defined, `struct ENTDATA' is used by the parser to store
+	      things pointed to by the resultant `struct STRUCTURE'.
+
+   NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
+
+   EXTRA_ARGS -- defined iff extra parameters must be passed to the parser
+   EXTRA_ARGS_DECL -- declaration for these extra parameters
+   EXTRA_ARGS_VALUE -- values to be passed for these parameters
+
+   Also see files-XXX.c.  */
+
+#ifndef EXTRA_ARGS
+# define EXTRA_ARGS
+# define EXTRA_ARGS_DECL
+# define EXTRA_ARGS_VALUE
+#endif
+
+#define CONCAT(a,b) CONCAT1(a,b)
+#define CONCAT1(a,b) a##b
+
+#ifndef STRUCTURE
+# define STRUCTURE ENTNAME
+#endif
+
+
+struct parser_data
+  {
+#ifdef ENTDATA
+    struct ENTDATA entdata;
+# define ENTDATA_DECL(data) struct ENTDATA *const entdata = &data->entdata;
+#else
+# define ENTDATA_DECL(data)
+#endif
+    char linebuffer[0];
+  };
+
+#ifdef ENTDATA
+/* The function can't be exported, because the entdata structure
+   is defined only in files-foo.c.  */
+# define parser_stclass static
+# define nss_files_parse_hidden_def(name)
+#else
+/* Export the line parser function so it can be used in nss_db.  */
+# define parser_stclass /* Global */
+# define parse_line CONCAT(_nss_files_parse_,ENTNAME)
+# if IS_IN (libc)
+/* We are defining one of the functions that actually lives in libc
+   because it is used to implement fget*ent and suchlike.  */
+#  define nss_files_parse_hidden_def(name) libc_hidden_def (name)
+# else
+#  define nss_files_parse_hidden_def(name) libnss_files_hidden_def (name)
+# endif
+#endif
+
+
+#ifdef EXTERN_PARSER
+
+/* The parser is defined in a different module.  */
+extern int parse_line (char *line, struct STRUCTURE *result,
+		       struct parser_data *data, size_t datalen, int *errnop
+		       EXTRA_ARGS_DECL);
+
+# define LINE_PARSER(EOLSET, BODY) /* Do nothing */
+
+#else
+
+/* Define a line parsing function.  */
+
+# define LINE_PARSER(EOLSET, BODY)					      \
+parser_stclass int							      \
+parse_line (char *line, struct STRUCTURE *result,			      \
+	    struct parser_data *data, size_t datalen, int *errnop	      \
+	    EXTRA_ARGS_DECL)						      \
+{									      \
+  ENTDATA_DECL (data)							      \
+  BUFFER_PREPARE							      \
+  char *p = strpbrk (line, EOLSET "\n");				      \
+  if (p != NULL)							      \
+    *p = '\0';								      \
+  BODY;									      \
+  TRAILING_LIST_PARSER;							      \
+  return 1;								      \
+}									      \
+nss_files_parse_hidden_def (parse_line)
+
+
+# define STRING_FIELD(variable, terminator_p, swallow)			      \
+  {									      \
+    variable = line;							      \
+    while (*line != '\0' && !terminator_p (*line))			      \
+      ++line;								      \
+    if (*line != '\0')							      \
+      {									      \
+	*line = '\0';							      \
+	do								      \
+	  ++line;							      \
+	while (swallow && terminator_p (*line));			      \
+      }									      \
+  }
+
+# define STRING_LIST(variable, terminator_c) \
+  {									      \
+    char **list = parse_list (&line, buf_start, buf_end, terminator_c,	      \
+			      errnop);					      \
+    if (list)								      \
+      variable = list;							      \
+    else								      \
+      return -1;		/* -1 indicates we ran out of space.  */      \
+									      \
+    /* Determine the new end of the buffer.  */				      \
+    while (*list != NULL)						      \
+      ++list;								      \
+    buf_start = (char *) (list + 1);					      \
+  }
+
+/* Helper function.  */
+static inline uint32_t
+__attribute__ ((always_inline))
+strtou32 (const char *nptr, char **endptr, int base)
+{
+  unsigned long int val = strtoul (nptr, endptr, base);
+
+  /* Match the 32-bit behavior on 64-bit platforms.  */
+  if (sizeof (long int) > 4 && val > 0xffffffff)
+    val = 0xffffffff;
+
+  return val;
+}
+
+# define INT_FIELD(variable, terminator_p, swallow, base, convert)	      \
+  {									      \
+    char *endp;								      \
+    variable = convert (strtou32 (line, &endp, base));			      \
+    if (endp == line)							      \
+      return 0;								      \
+    else if (terminator_p (*endp))					      \
+      do								      \
+	++endp;								      \
+      while (swallow && terminator_p (*endp));				      \
+    else if (*endp != '\0')						      \
+      return 0;								      \
+    line = endp;							      \
+  }
+
+# define INT_FIELD_MAYBE_NULL(variable, terminator_p, swallow, base, convert, default)	      \
+  {									      \
+    char *endp;								      \
+    if (*line == '\0')							      \
+      /* We expect some more input, so don't allow the string to end here. */ \
+      return 0;								      \
+    variable = convert (strtou32 (line, &endp, base));			      \
+    if (endp == line)							      \
+      variable = default;						      \
+    if (terminator_p (*endp))						      \
+      do								      \
+	++endp;								      \
+      while (swallow && terminator_p (*endp));				      \
+    else if (*endp != '\0')						      \
+      return 0;								      \
+    line = endp;							      \
+  }
+
+# define ISCOLON(c) ((c) == ':')
+
+
+# ifndef TRAILING_LIST_MEMBER
+#  define BUFFER_PREPARE /* Nothing to do.  */
+#  define TRAILING_LIST_PARSER /* Nothing to do.  */
+# else
+
+# define BUFFER_PREPARE \
+  char *buf_start = NULL;						      \
+  char *buf_end = (char *) data + datalen;				      \
+  if (line >= data->linebuffer && line < buf_end)			      \
+    /* Find the end of the line buffer, we will use the space in	      \
+       DATA after it for storing the vector of pointers.  */		      \
+    buf_start = strchr (line, '\0') + 1;				      \
+  else									      \
+    /* LINE does not point within DATA->linebuffer, so that space is	      \
+       not being used for scratch space right now.  We can use all of	      \
+       it for the pointer vector storage.  */				      \
+    buf_start = data->linebuffer;					      \
+
+#  define TRAILING_LIST_PARSER \
+{									      \
+  if (buf_start == NULL)						      \
+    {									      \
+      if (line >= data->linebuffer && line < buf_end)			      \
+	/* Find the end of the line buffer, we will use the space in	      \
+	   DATA after it for storing the vector of pointers.  */	      \
+	buf_start = strchr (line, '\0') + 1;				      \
+      else								      \
+	/* LINE does not point within DATA->linebuffer, so that space is      \
+	   not being used for scratch space right now.  We can use all of     \
+	   it for the pointer vector storage.  */			      \
+	buf_start = data->linebuffer;					      \
+    }									      \
+									      \
+  char **list = parse_list (&line, buf_start, buf_end, '\0', errnop);	      \
+  if (list)								      \
+    result->TRAILING_LIST_MEMBER = list;				      \
+  else									      \
+    return -1;		/* -1 indicates we ran out of space.  */	      \
+}
+
+static inline char **
+__attribute ((always_inline))
+parse_list (char **linep, char *eol, char *buf_end, int terminator_c,
+	    int *errnop)
+{
+  char *line = *linep;
+  char **list, **p;
+
+  /* Adjust the pointer so it is aligned for storing pointers.  */
+  eol += __alignof__ (char *) - 1;
+  eol -= (eol - (char *) 0) % __alignof__ (char *);
+  /* We will start the storage here for the vector of pointers.  */
+  list = (char **) eol;
+
+  p = list;
+  while (1)
+    {
+      if ((char *) (p + 2) > buf_end)
+	{
+	  /* We cannot fit another pointer in the buffer.  */
+	  *errnop = ERANGE;
+	  return NULL;
+	}
+
+      if (*line == '\0')
+	break;
+      if (*line == terminator_c)
+	{
+	  ++line;
+	  break;
+	}
+
+      /* Skip leading white space.  This might not be portable but useful.  */
+      while (isspace (*line))
+	++line;
+
+      char *elt = line;
+      while (1)
+	{
+	  if (*line == '\0' || *line == terminator_c
+	      || TRAILING_LIST_SEPARATOR_P (*line))
+	    {
+	      /* End of the next entry.  */
+	      if (line > elt)
+		/* We really found some data.  */
+		*p++ = elt;
+
+	      /* Terminate string if necessary.  */
+	      if (*line != '\0')
+		{
+		  char endc = *line;
+		  *line++ = '\0';
+		  if (endc == terminator_c)
+		    goto out;
+		}
+	      break;
+	    }
+	  ++line;
+	}
+    }
+ out:
+  *p = NULL;
+  *linep = line;
+
+  return list;
+}
+
+# endif	/* TRAILING_LIST_MEMBER */
+#endif	/* EXTERN_PARSER */
+
+
+#define LOOKUP_NAME(nameelt, aliaselt)					      \
+{									      \
+  char **ap;								      \
+  if (! strcmp (name, result->nameelt))					      \
+    break;								      \
+  for (ap = result->aliaselt; *ap; ++ap)				      \
+    if (! strcmp (name, *ap))						      \
+      break;								      \
+  if (*ap)								      \
+    break;								      \
+}
+
+#define LOOKUP_NAME_CASE(nameelt, aliaselt)				      \
+{									      \
+  char **ap;								      \
+  if (! __strcasecmp (name, result->nameelt))				      \
+    break;								      \
+  for (ap = result->aliaselt; *ap; ++ap)				      \
+    if (! __strcasecmp (name, *ap))					      \
+      break;								      \
+  if (*ap)								      \
+    break;								      \
+}
+
+
+/* This is defined by db-*.c to include "../nss_db/db-XXX.c" instead.  */
+#ifndef GENERIC
+# define GENERIC "files-XXX.c"
+#endif