/* Common code for file-based database parsers in nss_files module.
- Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc.
+ Copyright (C) 1996-2019 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
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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
+ License along with the GNU C Library; if not, see
+ <https://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:
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'.
+ things pointed to by the resultant `struct STRUCTURE'.
NEED_H_ERRNO - defined iff an arg `int *herrnop' is used.
#ifdef ENTDATA
/* The function can't be exported, because the entdata structure
is defined only in files-foo.c. */
-# define parser_stclass static inline
+# 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)
-# define nss_files_parse_hidden_def(name) libc_hidden_def (name)
+# 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
EXTRA_ARGS_DECL) \
{ \
ENTDATA_DECL (data) \
+ BUFFER_PREPARE \
char *p = strpbrk (line, EOLSET "\n"); \
if (p != NULL) \
*p = '\0'; \
} \
}
+# 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 (strtoul (line, &endp, base)); \
+ variable = convert (strtou32 (line, &endp, base)); \
if (endp == line) \
return 0; \
else if (terminator_p (*endp)) \
if (*line == '\0') \
/* We expect some more input, so don't allow the string to end here. */ \
return 0; \
- variable = convert (strtoul (line, &endp, base)); \
+ variable = convert (strtou32 (line, &endp, base)); \
if (endp == line) \
variable = default; \
if (terminator_p (*endp)) \
# ifndef TRAILING_LIST_MEMBER
+# define BUFFER_PREPARE /* Nothing to do. */
# define TRAILING_LIST_PARSER /* Nothing to do. */
# else
-# define TRAILING_LIST_PARSER \
+# 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 \
{ \
- char **list = parse_list (line, data, datalen, errnop); \
+ 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 \
+ else \
return -1; /* -1 indicates we ran out of space. */ \
}
static inline char **
-parse_list (char *line, struct parser_data *data, size_t datalen, int *errnop)
+__attribute ((always_inline))
+parse_list (char **linep, char *eol, char *buf_end, int terminator_c,
+ int *errnop)
{
- char *eol, **list, **p;
-
- if (line >= data->linebuffer && line < (char *) data + datalen)
- /* Find the end of the line buffer, we will use the space in DATA after
- it for storing the vector of pointers. */
- eol = 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. */
- eol = data->linebuffer;
+ 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 *);
p = list;
while (1)
{
- char *elt;
-
- if ((size_t) ((char *) &p[1] - (char *) data) > datalen)
+ 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;
- elt = line;
+ char *elt = line;
while (1)
{
- if (*line == '\0' || TRAILING_LIST_SEPARATOR_P (*line))
+ if (*line == '\0' || *line == terminator_c
+ || TRAILING_LIST_SEPARATOR_P (*line))
{
/* End of the next entry. */
if (line > elt)
/* Terminate string if necessary. */
if (*line != '\0')
- *line++ = '\0';
+ {
+ char endc = *line;
+ *line++ = '\0';
+ if (endc == terminator_c)
+ goto out;
+ }
break;
}
++line;
}
}
+ out:
*p = NULL;
+ *linep = line;
return list;
}
projects / thirdparty / glibc.git / blobdiff