d7561cbbf2
https://sourceware.org/ml/gdb-patches/2013-09/msg01017.html https://sourceware.org/ml/gdb-patches/2013-09/msg01018.html https://sourceware.org/ml/gdb-patches/2013-09/msg01019.html https://sourceware.org/ml/gdb-patches/2013-09/msg01020.html
99 lines
4 KiB
C
99 lines
4 KiB
C
/* Interface to C preprocessor macro expansion for GDB.
|
|
Copyright (C) 2002-2013 Free Software Foundation, Inc.
|
|
Contributed by Red Hat, Inc.
|
|
|
|
This file is part of GDB.
|
|
|
|
This program is free software; you can redistribute it and/or modify
|
|
it under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
This program 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 General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
|
|
|
|
|
#ifndef MACROEXP_H
|
|
#define MACROEXP_H
|
|
|
|
/* A function for looking up preprocessor macro definitions. Return
|
|
the preprocessor definition of NAME in scope according to BATON, or
|
|
zero if NAME is not defined as a preprocessor macro.
|
|
|
|
The caller must not free or modify the definition returned. It is
|
|
probably unwise for the caller to hold pointers to it for very
|
|
long; it probably lives in some objfile's obstacks. */
|
|
typedef struct macro_definition *(macro_lookup_ftype) (const char *name,
|
|
void *baton);
|
|
|
|
|
|
/* Expand any preprocessor macros in SOURCE, and return the expanded
|
|
text. Use LOOKUP_FUNC and LOOKUP_FUNC_BATON to find identifiers'
|
|
preprocessor definitions. SOURCE is a null-terminated string. The
|
|
result is a null-terminated string, allocated using xmalloc; it is
|
|
the caller's responsibility to free it. */
|
|
char *macro_expand (const char *source,
|
|
macro_lookup_ftype *lookup_func,
|
|
void *lookup_func_baton);
|
|
|
|
|
|
/* Expand all preprocessor macro references that appear explicitly in
|
|
SOURCE, but do not expand any new macro references introduced by
|
|
that first level of expansion. Use LOOKUP_FUNC and
|
|
LOOKUP_FUNC_BATON to find identifiers' preprocessor definitions.
|
|
SOURCE is a null-terminated string. The result is a
|
|
null-terminated string, allocated using xmalloc; it is the caller's
|
|
responsibility to free it. */
|
|
char *macro_expand_once (const char *source,
|
|
macro_lookup_ftype *lookup_func,
|
|
void *lookup_func_baton);
|
|
|
|
|
|
/* If the null-terminated string pointed to by *LEXPTR begins with a
|
|
macro invocation, return the result of expanding that invocation as
|
|
a null-terminated string, and set *LEXPTR to the next character
|
|
after the invocation. The result is completely expanded; it
|
|
contains no further macro invocations.
|
|
|
|
Otherwise, if *LEXPTR does not start with a macro invocation,
|
|
return zero, and leave *LEXPTR unchanged.
|
|
|
|
Use LOOKUP_FUNC and LOOKUP_BATON to find macro definitions.
|
|
|
|
If this function returns a string, the caller is responsible for
|
|
freeing it, using xfree.
|
|
|
|
We need this expand-one-token-at-a-time interface in order to
|
|
accomodate GDB's C expression parser, which may not consume the
|
|
entire string. When the user enters a command like
|
|
|
|
(gdb) break *func+20 if x == 5
|
|
|
|
the parser is expected to consume `func+20', and then stop when it
|
|
sees the "if". But of course, "if" appearing in a character string
|
|
or as part of a larger identifier doesn't count. So you pretty
|
|
much have to do tokenization to find the end of the string that
|
|
needs to be macro-expanded. Our C/C++ tokenizer isn't really
|
|
designed to be called by anything but the yacc parser engine. */
|
|
char *macro_expand_next (const char **lexptr,
|
|
macro_lookup_ftype *lookup_func,
|
|
void *lookup_baton);
|
|
|
|
/* Functions to classify characters according to cpp rules. */
|
|
|
|
int macro_is_whitespace (int c);
|
|
int macro_is_identifier_nondigit (int c);
|
|
int macro_is_digit (int c);
|
|
|
|
|
|
/* Stringify STR according to C rules and return an xmalloc'd pointer
|
|
to the result. */
|
|
|
|
char *macro_stringify (const char *str);
|
|
|
|
#endif /* MACROEXP_H */
|