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3666a04883
This commits the result of running gdb/copyright.py as per our Start
of New Year procedure...
gdb/ChangeLog
Update copyright year range in copyright header of all GDB files.
85 lines
3.2 KiB
C
85 lines
3.2 KiB
C
/* Interface to C preprocessor macro expansion for GDB.
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Copyright (C) 2002-2021 Free Software Foundation, Inc.
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Contributed by Red Hat, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#ifndef MACROEXP_H
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#define MACROEXP_H
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struct macro_scope;
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/* Expand any preprocessor macros in SOURCE (a null-terminated string), and
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return the expanded text.
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Use SCOPE to find identifiers' preprocessor definitions.
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The result is a null-terminated string. */
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gdb::unique_xmalloc_ptr<char> macro_expand (const char *source,
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const macro_scope &scope);
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/* Expand all preprocessor macro references that appear explicitly in SOURCE
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(a null-terminated string), but do not expand any new macro references
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introduced by that first level of expansion.
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Use SCOPE to find identifiers' preprocessor definitions.
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The result is a null-terminated string. */
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gdb::unique_xmalloc_ptr<char> macro_expand_once (const char *source,
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const macro_scope &scope);
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/* If the null-terminated string pointed to by *LEXPTR begins with a
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macro invocation, return the result of expanding that invocation as
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a null-terminated string, and set *LEXPTR to the next character
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after the invocation. The result is completely expanded; it
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contains no further macro invocations.
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Otherwise, if *LEXPTR does not start with a macro invocation,
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return nullptr, and leave *LEXPTR unchanged.
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Use SCOPE to find macro definitions.
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If this function returns a string, the caller is responsible for
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freeing it, using xfree.
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We need this expand-one-token-at-a-time interface in order to
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accomodate GDB's C expression parser, which may not consume the
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entire string. When the user enters a command like
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(gdb) break *func+20 if x == 5
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the parser is expected to consume `func+20', and then stop when it
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sees the "if". But of course, "if" appearing in a character string
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or as part of a larger identifier doesn't count. So you pretty
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much have to do tokenization to find the end of the string that
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needs to be macro-expanded. Our C/C++ tokenizer isn't really
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designed to be called by anything but the yacc parser engine. */
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gdb::unique_xmalloc_ptr<char> macro_expand_next (const char **lexptr,
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const macro_scope &scope);
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/* Functions to classify characters according to cpp rules. */
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int macro_is_whitespace (int c);
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int macro_is_identifier_nondigit (int c);
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int macro_is_digit (int c);
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/* Stringify STR according to C rules and return a null-terminated string. */
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gdb::unique_xmalloc_ptr<char> macro_stringify (const char *str);
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#endif /* MACROEXP_H */
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