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Diffstat (limited to 'nss/nss_files/files-parse.c')
| -rw-r--r-- | nss/nss_files/files-parse.c | 335 |
1 files changed, 0 insertions, 335 deletions
diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c deleted file mode 100644 index b31ff9e17b..0000000000 --- a/nss/nss_files/files-parse.c +++ /dev/null @@ -1,335 +0,0 @@ -/* 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 |