+++ /dev/null
-/* Part of CPP library. (Macro and #define handling.)
- Copyright (C) 1986, 1987, 1989, 1992, 1993, 1994, 1995, 1996, 1998,
- 1999, 2000, 2001, 2002 Free Software Foundation, Inc.
- Written by Per Bothner, 1994.
- Based on CCCP program by Paul Rubin, June 1986
- Adapted to ANSI C, Richard Stallman, Jan 1987
-
-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 2, 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, write to the Free Software
-Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
-
- In other words, you are welcome to use, share and improve this program.
- You are forbidden to forbid anyone else to use, share and improve
- what you give them. Help stamp out software-hoarding! */
-
-#include "config.h"
-#include "system.h"
-#include "cpplib.h"
-#include "cpphash.h"
-
-struct cpp_macro
-{
- cpp_hashnode **params; /* Parameters, if any. */
- cpp_token *expansion; /* First token of replacement list. */
- unsigned int line; /* Starting line number. */
- unsigned int count; /* Number of tokens in expansion. */
- unsigned short paramc; /* Number of parameters. */
- unsigned int fun_like : 1; /* If a function-like macro. */
- unsigned int variadic : 1; /* If a variadic macro. */
- unsigned int syshdr : 1; /* If macro defined in system header. */
-};
-
-typedef struct macro_arg macro_arg;
-struct macro_arg
-{
- const cpp_token **first; /* First token in unexpanded argument. */
- const cpp_token **expanded; /* Macro-expanded argument. */
- const cpp_token *stringified; /* Stringified argument. */
- unsigned int count; /* # of tokens in argument. */
- unsigned int expanded_count; /* # of tokens in expanded argument. */
-};
-
-/* Macro expansion. */
-
-static int enter_macro_context PARAMS ((cpp_reader *, cpp_hashnode *));
-static int builtin_macro PARAMS ((cpp_reader *, cpp_hashnode *));
-static void push_token_context
- PARAMS ((cpp_reader *, cpp_hashnode *, const cpp_token *, unsigned int));
-static void push_ptoken_context
- PARAMS ((cpp_reader *, cpp_hashnode *, _cpp_buff *,
- const cpp_token **, unsigned int));
-static _cpp_buff *collect_args PARAMS ((cpp_reader *, const cpp_hashnode *));
-static cpp_context *next_context PARAMS ((cpp_reader *));
-static const cpp_token *padding_token
- PARAMS ((cpp_reader *, const cpp_token *));
-static void expand_arg PARAMS ((cpp_reader *, macro_arg *));
-static const cpp_token *new_string_token PARAMS ((cpp_reader *, U_CHAR *,
- unsigned int));
-static const cpp_token *new_number_token PARAMS ((cpp_reader *, unsigned int));
-static const cpp_token *stringify_arg PARAMS ((cpp_reader *, macro_arg *));
-static void paste_all_tokens PARAMS ((cpp_reader *, const cpp_token *));
-static bool paste_tokens PARAMS ((cpp_reader *, const cpp_token **,
- const cpp_token *));
-static void replace_args PARAMS ((cpp_reader *, cpp_hashnode *, macro_arg *));
-static _cpp_buff *funlike_invocation_p PARAMS ((cpp_reader *, cpp_hashnode *));
-
-/* #define directive parsing and handling. */
-
-static cpp_token *alloc_expansion_token PARAMS ((cpp_reader *, cpp_macro *));
-static cpp_token *lex_expansion_token PARAMS ((cpp_reader *, cpp_macro *));
-static int warn_of_redefinition PARAMS ((const cpp_hashnode *,
- const cpp_macro *));
-static int save_parameter PARAMS ((cpp_reader *, cpp_macro *, cpp_hashnode *));
-static int parse_params PARAMS ((cpp_reader *, cpp_macro *));
-static void check_trad_stringification PARAMS ((cpp_reader *,
- const cpp_macro *,
- const cpp_string *));
-
-/* Allocates and returns a CPP_STRING token, containing TEXT of length
- LEN, after null-terminating it. TEXT must be in permanent storage. */
-static const cpp_token *
-new_string_token (pfile, text, len)
- cpp_reader *pfile;
- unsigned char *text;
- unsigned int len;
-{
- cpp_token *token = _cpp_temp_token (pfile);
-
- text[len] = '\0';
- token->type = CPP_STRING;
- token->val.str.len = len;
- token->val.str.text = text;
- token->flags = 0;
- return token;
-}
-
-/* Allocates and returns a CPP_NUMBER token evaluating to NUMBER. */
-static const cpp_token *
-new_number_token (pfile, number)
- cpp_reader *pfile;
- unsigned int number;
-{
- cpp_token *token = _cpp_temp_token (pfile);
- /* 21 bytes holds all NUL-terminated unsigned 64-bit numbers. */
- unsigned char *buf = _cpp_unaligned_alloc (pfile, 21);
-
- sprintf ((char *) buf, "%u", number);
- token->type = CPP_NUMBER;
- token->val.str.text = buf;
- token->val.str.len = ustrlen (buf);
- token->flags = 0;
- return token;
-}
-
-static const char * const monthnames[] =
-{
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
-};
-
-/* Handle builtin macros like __FILE__, and push the resulting token
- on the context stack. Also handles _Pragma, for which no new token
- is created. Returns 1 if it generates a new token context, 0 to
- return the token to the caller. */
-static int
-builtin_macro (pfile, node)
- cpp_reader *pfile;
- cpp_hashnode *node;
-{
- const cpp_token *result;
-
- switch (node->value.builtin)
- {
- default:
- cpp_ice (pfile, "invalid built-in macro \"%s\"", NODE_NAME (node));
- return 0;
-
- case BT_FILE:
- case BT_BASE_FILE:
- {
- unsigned int len;
- const char *name;
- U_CHAR *buf;
- const struct line_map *map = pfile->map;
-
- if (node->value.builtin == BT_BASE_FILE)
- while (! MAIN_FILE_P (map))
- map = INCLUDED_FROM (&pfile->line_maps, map);
-
- name = map->to_file;
- len = strlen (name);
- buf = _cpp_unaligned_alloc (pfile, len * 4 + 1);
- len = cpp_quote_string (buf, (const unsigned char *) name, len) - buf;
-
- result = new_string_token (pfile, buf, len);
- }
- break;
-
- case BT_INCLUDE_LEVEL:
- /* The line map depth counts the primary source as level 1, but
- historically __INCLUDE_DEPTH__ has called the primary source
- level 0. */
- result = new_number_token (pfile, pfile->line_maps.depth - 1);
- break;
-
- case BT_SPECLINE:
- /* If __LINE__ is embedded in a macro, it must expand to the
- line of the macro's invocation, not its definition.
- Otherwise things like assert() will not work properly. */
- result = new_number_token (pfile,
- SOURCE_LINE (pfile->map,
- pfile->cur_token[-1].line));
- break;
-
- case BT_STDC:
- {
- int stdc = (!CPP_IN_SYSTEM_HEADER (pfile)
- || pfile->spec_nodes.n__STRICT_ANSI__->type != NT_VOID);
- result = new_number_token (pfile, stdc);
- }
- break;
-
- case BT_DATE:
- case BT_TIME:
- if (pfile->date.type == CPP_EOF)
- {
- /* Allocate __DATE__ and __TIME__ strings from permanent
- storage. We only do this once, and don't generate them
- at init time, because time() and localtime() are very
- slow on some systems. */
- time_t tt = time (NULL);
- struct tm *tb = localtime (&tt);
-
- pfile->date.val.str.text =
- _cpp_unaligned_alloc (pfile, sizeof ("Oct 11 1347"));
- pfile->date.val.str.len = sizeof ("Oct 11 1347") - 1;
- pfile->date.type = CPP_STRING;
- pfile->date.flags = 0;
- sprintf ((char *) pfile->date.val.str.text, "%s %2d %4d",
- monthnames[tb->tm_mon], tb->tm_mday, tb->tm_year + 1900);
-
- pfile->time.val.str.text =
- _cpp_unaligned_alloc (pfile, sizeof ("12:34:56"));
- pfile->time.val.str.len = sizeof ("12:34:56") - 1;
- pfile->time.type = CPP_STRING;
- pfile->time.flags = 0;
- sprintf ((char *) pfile->time.val.str.text, "%02d:%02d:%02d",
- tb->tm_hour, tb->tm_min, tb->tm_sec);
- }
-
- if (node->value.builtin == BT_DATE)
- result = &pfile->date;
- else
- result = &pfile->time;
- break;
-
- case BT_PRAGMA:
- /* Don't interpret _Pragma within directives. The standard is
- not clear on this, but to me this makes most sense. */
- if (pfile->state.in_directive)
- return 0;
-
- _cpp_do__Pragma (pfile);
- return 1;
- }
-
- push_token_context (pfile, NULL, result, 1);
- return 1;
-}
-
-/* Copies SRC, of length LEN, to DEST, adding backslashes before all
- backslashes and double quotes. Non-printable characters are
- converted to octal. DEST must be of sufficient size. Returns
- a pointer to the end of the string. */
-U_CHAR *
-cpp_quote_string (dest, src, len)
- U_CHAR *dest;
- const U_CHAR *src;
- unsigned int len;
-{
- while (len--)
- {
- U_CHAR c = *src++;
-
- if (c == '\\' || c == '"')
- {
- *dest++ = '\\';
- *dest++ = c;
- }
- else
- {
- if (ISPRINT (c))
- *dest++ = c;
- else
- {
- sprintf ((char *) dest, "\\%03o", c);
- dest += 4;
- }
- }
- }
-
- return dest;
-}
-
-/* Convert a token sequence ARG to a single string token according to
- the rules of the ISO C #-operator. */
-static const cpp_token *
-stringify_arg (pfile, arg)
- cpp_reader *pfile;
- macro_arg *arg;
-{
- unsigned char *dest = BUFF_FRONT (pfile->u_buff);
- unsigned int i, escape_it, backslash_count = 0;
- const cpp_token *source = NULL;
- size_t len;
-
- /* Loop, reading in the argument's tokens. */
- for (i = 0; i < arg->count; i++)
- {
- const cpp_token *token = arg->first[i];
-
- if (token->type == CPP_PADDING)
- {
- if (source == NULL)
- source = token->val.source;
- continue;
- }
-
- escape_it = (token->type == CPP_STRING || token->type == CPP_WSTRING
- || token->type == CPP_CHAR || token->type == CPP_WCHAR);
-
- /* Room for each char being written in octal, initial space and
- final NUL. */
- len = cpp_token_len (token);
- if (escape_it)
- len *= 4;
- len += 2;
-
- if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < len)
- {
- size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff);
- _cpp_extend_buff (pfile, &pfile->u_buff, len);
- dest = BUFF_FRONT (pfile->u_buff) + len_so_far;
- }
-
- /* Leading white space? */
- if (dest != BUFF_FRONT (pfile->u_buff))
- {
- if (source == NULL)
- source = token;
- if (source->flags & PREV_WHITE)
- *dest++ = ' ';
- }
- source = NULL;
-
- if (escape_it)
- {
- _cpp_buff *buff = _cpp_get_buff (pfile, len);
- unsigned char *buf = BUFF_FRONT (buff);
- len = cpp_spell_token (pfile, token, buf) - buf;
- dest = cpp_quote_string (dest, buf, len);
- _cpp_release_buff (pfile, buff);
- }
- else
- dest = cpp_spell_token (pfile, token, dest);
-
- if (token->type == CPP_OTHER && token->val.c == '\\')
- backslash_count++;
- else
- backslash_count = 0;
- }
-
- /* Ignore the final \ of invalid string literals. */
- if (backslash_count & 1)
- {
- cpp_warning (pfile, "invalid string literal, ignoring final '\\'");
- dest--;
- }
-
- /* Commit the memory, including NUL, and return the token. */
- if ((size_t) (BUFF_LIMIT (pfile->u_buff) - dest) < 1)
- {
- size_t len_so_far = dest - BUFF_FRONT (pfile->u_buff);
- _cpp_extend_buff (pfile, &pfile->u_buff, 1);
- dest = BUFF_FRONT (pfile->u_buff) + len_so_far;
- }
- len = dest - BUFF_FRONT (pfile->u_buff);
- BUFF_FRONT (pfile->u_buff) = dest + 1;
- return new_string_token (pfile, dest - len, len);
-}
-
-/* Try to paste two tokens. On success, return non-zero. In any
- case, PLHS is updated to point to the pasted token, which is
- guaranteed to not have the PASTE_LEFT flag set. */
-static bool
-paste_tokens (pfile, plhs, rhs)
- cpp_reader *pfile;
- const cpp_token **plhs, *rhs;
-{
- unsigned char *buf, *end;
- const cpp_token *lhs;
- unsigned int len;
- bool valid;
-
- lhs = *plhs;
- len = cpp_token_len (lhs) + cpp_token_len (rhs) + 1;
- buf = (unsigned char *) alloca (len);
- end = cpp_spell_token (pfile, lhs, buf);
-
- /* Avoid comment headers, since they are still processed in stage 3.
- It is simpler to insert a space here, rather than modifying the
- lexer to ignore comments in some circumstances. Simply returning
- false doesn't work, since we want to clear the PASTE_LEFT flag. */
- if (lhs->type == CPP_DIV
- && (rhs->type == CPP_MULT || rhs->type == CPP_DIV))
- *end++ = ' ';
- end = cpp_spell_token (pfile, rhs, end);
- *end = '\0';
-
- cpp_push_buffer (pfile, buf, end - buf, /* from_stage3 */ true, 1);
-
- /* Tweak the column number the lexer will report. */
- pfile->buffer->col_adjust = pfile->cur_token[-1].col - 1;
-
- /* We don't want a leading # to be interpreted as a directive. */
- pfile->buffer->saved_flags = 0;
-
- /* Set pfile->cur_token as required by _cpp_lex_direct. */
- pfile->cur_token = _cpp_temp_token (pfile);
- *plhs = _cpp_lex_direct (pfile);
- valid = pfile->buffer->cur == pfile->buffer->rlimit;
- _cpp_pop_buffer (pfile);
-
- return valid;
-}
-
-/* Handles an arbitrarily long sequence of ## operators, with initial
- operand LHS. This implementation is left-associative,
- non-recursive, and finishes a paste before handling succeeding
- ones. If a paste fails, we back up to the RHS of the failing ##
- operator before pushing the context containing the result of prior
- successful pastes, with the effect that the RHS appears in the
- output stream after the pasted LHS normally. */
-static void
-paste_all_tokens (pfile, lhs)
- cpp_reader *pfile;
- const cpp_token *lhs;
-{
- const cpp_token *rhs;
- cpp_context *context = pfile->context;
-
- do
- {
- /* Take the token directly from the current context. We can do
- this, because we are in the replacement list of either an
- object-like macro, or a function-like macro with arguments
- inserted. In either case, the constraints to #define
- guarantee we have at least one more token. */
- if (context->direct_p)
- rhs = context->first.token++;
- else
- rhs = *context->first.ptoken++;
-
- if (rhs->type == CPP_PADDING)
- abort ();
-
- if (!paste_tokens (pfile, &lhs, rhs))
- {
- _cpp_backup_tokens (pfile, 1);
-
- /* Mandatory warning for all apart from assembler. */
- if (CPP_OPTION (pfile, lang) != CLK_ASM)
- cpp_warning (pfile,
- "pasting \"%s\" and \"%s\" does not give a valid preprocessing token",
- cpp_token_as_text (pfile, lhs),
- cpp_token_as_text (pfile, rhs));
- break;
- }
- }
- while (rhs->flags & PASTE_LEFT);
-
- /* Put the resulting token in its own context. */
- push_token_context (pfile, NULL, lhs, 1);
-}
-
-/* Reads and returns the arguments to a function-like macro
- invocation. Assumes the opening parenthesis has been processed.
- If there is an error, emits an appropriate diagnostic and returns
- NULL. Each argument is terminated by a CPP_EOF token, for the
- future benefit of expand_arg(). */
-static _cpp_buff *
-collect_args (pfile, node)
- cpp_reader *pfile;
- const cpp_hashnode *node;
-{
- _cpp_buff *buff, *base_buff;
- cpp_macro *macro;
- macro_arg *args, *arg;
- const cpp_token *token;
- unsigned int argc;
- bool error = false;
-
- macro = node->value.macro;
- if (macro->paramc)
- argc = macro->paramc;
- else
- argc = 1;
- buff = _cpp_get_buff (pfile, argc * (50 * sizeof (cpp_token *)
- + sizeof (macro_arg)));
- base_buff = buff;
- args = (macro_arg *) buff->base;
- memset (args, 0, argc * sizeof (macro_arg));
- buff->cur = (unsigned char *) &args[argc];
- arg = args, argc = 0;
-
- /* Collect the tokens making up each argument. We don't yet know
- how many arguments have been supplied, whether too many or too
- few. Hence the slightly bizarre usage of "argc" and "arg". */
- do
- {
- unsigned int paren_depth = 0;
- unsigned int ntokens = 0;
-
- argc++;
- arg->first = (const cpp_token **) buff->cur;
-
- for (;;)
- {
- /* Require space for 2 new tokens (including a CPP_EOF). */
- if ((unsigned char *) &arg->first[ntokens + 2] > buff->limit)
- {
- buff = _cpp_append_extend_buff (pfile, buff,
- 1000 * sizeof (cpp_token *));
- arg->first = (const cpp_token **) buff->cur;
- }
-
- token = cpp_get_token (pfile);
-
- if (token->type == CPP_PADDING)
- {
- /* Drop leading padding. */
- if (ntokens == 0)
- continue;
- }
- else if (token->type == CPP_OPEN_PAREN)
- paren_depth++;
- else if (token->type == CPP_CLOSE_PAREN)
- {
- if (paren_depth-- == 0)
- break;
- }
- else if (token->type == CPP_COMMA)
- {
- /* A comma does not terminate an argument within
- parentheses or as part of a variable argument. */
- if (paren_depth == 0
- && ! (macro->variadic && argc == macro->paramc))
- break;
- }
- else if (token->type == CPP_EOF
- || (token->type == CPP_HASH && token->flags & BOL))
- break;
-
- arg->first[ntokens++] = token;
- }
-
- /* Drop trailing padding. */
- while (ntokens > 0 && arg->first[ntokens - 1]->type == CPP_PADDING)
- ntokens--;
-
- arg->count = ntokens;
- arg->first[ntokens] = &pfile->eof;
-
- /* Terminate the argument. Excess arguments loop back and
- overwrite the final legitimate argument, before failing. */
- if (argc <= macro->paramc)
- {
- buff->cur = (unsigned char *) &arg->first[ntokens + 1];
- if (argc != macro->paramc)
- arg++;
- }
- }
- while (token->type != CPP_CLOSE_PAREN
- && token->type != CPP_EOF
- && token->type != CPP_HASH);
-
- if (token->type == CPP_EOF || token->type == CPP_HASH)
- {
- bool step_back = false;
-
- /* 6.10.3 paragraph 11: If there are sequences of preprocessing
- tokens within the list of arguments that would otherwise act
- as preprocessing directives, the behavior is undefined.
-
- This implementation will report a hard error, terminate the
- macro invocation, and proceed to process the directive. */
- if (token->type == CPP_HASH)
- {
- cpp_error (pfile,
- "directives may not be used inside a macro argument");
- step_back = true;
- }
- else
- step_back = (pfile->context->prev || pfile->state.in_directive);
-
- /* We still need the CPP_EOF to end directives, and to end
- pre-expansion of a macro argument. Step back is not
- unconditional, since we don't want to return a CPP_EOF to our
- callers at the end of an -include-d file. */
- if (step_back)
- _cpp_backup_tokens (pfile, 1);
- cpp_error (pfile, "unterminated argument list invoking macro \"%s\"",
- NODE_NAME (node));
- error = true;
- }
- else if (argc < macro->paramc)
- {
- /* As an extension, a rest argument is allowed to not appear in
- the invocation at all.
- e.g. #define debug(format, args...) something
- debug("string");
-
- This is exactly the same as if there had been an empty rest
- argument - debug("string", ). */
-
- if (argc + 1 == macro->paramc && macro->variadic)
- {
- if (CPP_PEDANTIC (pfile) && ! macro->syshdr)
- cpp_pedwarn (pfile, "ISO C99 requires rest arguments to be used");
- }
- else
- {
- cpp_error (pfile,
- "macro \"%s\" requires %u arguments, but only %u given",
- NODE_NAME (node), macro->paramc, argc);
- error = true;
- }
- }
- else if (argc > macro->paramc)
- {
- /* Empty argument to a macro taking no arguments is OK. */
- if (argc != 1 || arg->count)
- {
- cpp_error (pfile,
- "macro \"%s\" passed %u arguments, but takes just %u",
- NODE_NAME (node), argc, macro->paramc);
- error = true;
- }
- }
-
- if (!error)
- {
- /* GCC has special semantics for , ## b where b is a varargs
- parameter: we remove the comma if b was omitted entirely.
- If b was merely an empty argument, the comma is retained.
- If the macro takes just one (varargs) parameter, then we
- retain the comma only if we are standards conforming.
-
- If FIRST is NULL replace_args () swallows the comma. */
- if (macro->variadic && (argc < macro->paramc
- || (argc == 1 && args[0].count == 0
- && !CPP_OPTION (pfile, std))))
- args[macro->paramc - 1].first = NULL;
- return base_buff;
- }
-
- _cpp_release_buff (pfile, base_buff);
- return NULL;
-}
-
-/* Search for an opening parenthesis to the macro of NODE, in such a
- way that, if none is found, we don't lose the information in any
- intervening padding tokens. If we find the parenthesis, collect
- the arguments and return the buffer containing them. */
-static _cpp_buff *
-funlike_invocation_p (pfile, node)
- cpp_reader *pfile;
- cpp_hashnode *node;
-{
- const cpp_token *token, *padding = NULL;
-
- for (;;)
- {
- token = cpp_get_token (pfile);
- if (token->type != CPP_PADDING)
- break;
- if (padding == NULL
- || (!(padding->flags & PREV_WHITE) && token->val.source == NULL))
- padding = token;
- }
-
- if (token->type == CPP_OPEN_PAREN)
- {
- pfile->state.parsing_args = 2;
- return collect_args (pfile, node);
- }
-
- /* CPP_EOF can be the end of macro arguments, or the end of the
- file. We mustn't back up over the latter. Ugh. */
- if (token->type != CPP_EOF || token == &pfile->eof)
- {
- /* Back up. We may have skipped padding, in which case backing
- up more than one token when expanding macros is in general
- too difficult. We re-insert it in its own context. */
- _cpp_backup_tokens (pfile, 1);
- if (padding)
- push_token_context (pfile, NULL, padding, 1);
- }
-
- return NULL;
-}
-
-/* Push the context of a macro with hash entry NODE onto the context
- stack. If we can successfully expand the macro, we push a context
- containing its yet-to-be-rescanned replacement list and return one.
- Otherwise, we don't push a context and return zero. */
-static int
-enter_macro_context (pfile, node)
- cpp_reader *pfile;
- cpp_hashnode *node;
-{
- /* The presence of a macro invalidates a file's controlling macro. */
- pfile->mi_valid = false;
-
- pfile->state.angled_headers = false;
-
- /* Handle standard macros. */
- if (! (node->flags & NODE_BUILTIN))
- {
- cpp_macro *macro = node->value.macro;
-
- if (macro->fun_like)
- {
- _cpp_buff *buff;
-
- pfile->state.prevent_expansion++;
- pfile->keep_tokens++;
- pfile->state.parsing_args = 1;
- buff = funlike_invocation_p (pfile, node);
- pfile->state.parsing_args = 0;
- pfile->keep_tokens--;
- pfile->state.prevent_expansion--;
-
- if (buff == NULL)
- {
- if (CPP_WTRADITIONAL (pfile) && ! node->value.macro->syshdr)
- cpp_warning (pfile,
- "function-like macro \"%s\" must be used with arguments in traditional C",
- NODE_NAME (node));
-
- return 0;
- }
-
- if (node->value.macro->paramc > 0)
- replace_args (pfile, node, (macro_arg *) buff->base);
- _cpp_release_buff (pfile, buff);
- }
-
- /* Disable the macro within its expansion. */
- node->flags |= NODE_DISABLED;
-
- if (macro->paramc == 0)
- push_token_context (pfile, node, macro->expansion, macro->count);
-
- return 1;
- }
-
- /* Handle built-in macros and the _Pragma operator. */
- return builtin_macro (pfile, node);
-}
-
-/* Replace the parameters in a function-like macro of NODE with the
- actual ARGS, and place the result in a newly pushed token context.
- Expand each argument before replacing, unless it is operated upon
- by the # or ## operators. */
-static void
-replace_args (pfile, node, args)
- cpp_reader *pfile;
- cpp_hashnode *node;
- macro_arg *args;
-{
- unsigned int i, total;
- const cpp_token *src, *limit;
- const cpp_token **dest, **first;
- macro_arg *arg;
- _cpp_buff *buff;
- cpp_macro *macro;
-
- /* First, fully macro-expand arguments, calculating the number of
- tokens in the final expansion as we go. The ordering of the if
- statements below is subtle; we must handle stringification before
- pasting. */
- macro = node->value.macro;
- total = macro->count;
- limit = macro->expansion + macro->count;
-
- for (src = macro->expansion; src < limit; src++)
- if (src->type == CPP_MACRO_ARG)
- {
- /* Leading and trailing padding tokens. */
- total += 2;
-
- /* We have an argument. If it is not being stringified or
- pasted it is macro-replaced before insertion. */
- arg = &args[src->val.arg_no - 1];
-
- if (src->flags & STRINGIFY_ARG)
- {
- if (!arg->stringified)
- arg->stringified = stringify_arg (pfile, arg);
- }
- else if ((src->flags & PASTE_LEFT)
- || (src > macro->expansion && (src[-1].flags & PASTE_LEFT)))
- total += arg->count - 1;
- else
- {
- if (!arg->expanded)
- expand_arg (pfile, arg);
- total += arg->expanded_count - 1;
- }
- }
-
- /* Now allocate space for the expansion, copy the tokens and replace
- the arguments. */
- buff = _cpp_get_buff (pfile, total * sizeof (cpp_token *));
- first = (const cpp_token **) buff->base;
- dest = first;
-
- for (src = macro->expansion; src < limit; src++)
- {
- unsigned int count;
- const cpp_token **from, **paste_flag;
-
- if (src->type != CPP_MACRO_ARG)
- {
- *dest++ = src;
- continue;
- }
-
- paste_flag = 0;
- arg = &args[src->val.arg_no - 1];
- if (src->flags & STRINGIFY_ARG)
- count = 1, from = &arg->stringified;
- else if (src->flags & PASTE_LEFT)
- count = arg->count, from = arg->first;
- else if (src != macro->expansion && (src[-1].flags & PASTE_LEFT))
- {
- count = arg->count, from = arg->first;
- if (dest != first)
- {
- if (dest[-1]->type == CPP_COMMA
- && macro->variadic
- && src->val.arg_no == macro->paramc)
- {
- /* Swallow a pasted comma if from == NULL, otherwise
- drop the paste flag. */
- if (from == NULL)
- dest--;
- else
- paste_flag = dest - 1;
- }
- /* Remove the paste flag if the RHS is a placemarker. */
- else if (count == 0)
- paste_flag = dest - 1;
- }
- }
- else
- count = arg->expanded_count, from = arg->expanded;
-
- /* Padding on the left of an argument (unless RHS of ##). */
- if (!pfile->state.in_directive
- && src != macro->expansion && !(src[-1].flags & PASTE_LEFT))
- *dest++ = padding_token (pfile, src);
-
- if (count)
- {
- memcpy (dest, from, count * sizeof (cpp_token *));
- dest += count;
-
- /* With a non-empty argument on the LHS of ##, the last
- token should be flagged PASTE_LEFT. */
- if (src->flags & PASTE_LEFT)
- paste_flag = dest - 1;
- }
-
- /* Avoid paste on RHS (even case count == 0). */
- if (!pfile->state.in_directive && !(src->flags & PASTE_LEFT))
- *dest++ = &pfile->avoid_paste;
-
- /* Add a new paste flag, or remove an unwanted one. */
- if (paste_flag)
- {
- cpp_token *token = _cpp_temp_token (pfile);
- token->type = (*paste_flag)->type;
- token->val.str = (*paste_flag)->val.str;
- if (src->flags & PASTE_LEFT)
- token->flags = (*paste_flag)->flags | PASTE_LEFT;
- else
- token->flags = (*paste_flag)->flags & ~PASTE_LEFT;
- *paste_flag = token;
- }
- }
-
- /* Free the expanded arguments. */
- for (i = 0; i < macro->paramc; i++)
- if (args[i].expanded)
- free (args[i].expanded);
-
- push_ptoken_context (pfile, node, buff, first, dest - first);
-}
-
-/* Return a special padding token, with padding inherited from SOURCE. */
-static const cpp_token *
-padding_token (pfile, source)
- cpp_reader *pfile;
- const cpp_token *source;
-{
- cpp_token *result = _cpp_temp_token (pfile);
-
- result->type = CPP_PADDING;
- result->val.source = source;
- result->flags = 0;
- return result;
-}
-
-/* Get a new uninitialized context. Create a new one if we cannot
- re-use an old one. */
-static cpp_context *
-next_context (pfile)
- cpp_reader *pfile;
-{
- cpp_context *result = pfile->context->next;
-
- if (result == 0)
- {
- result = xnew (cpp_context);
- result->prev = pfile->context;
- result->next = 0;
- pfile->context->next = result;
- }
-
- pfile->context = result;
- return result;
-}
-
-/* Push a list of pointers to tokens. */
-static void
-push_ptoken_context (pfile, macro, buff, first, count)
- cpp_reader *pfile;
- cpp_hashnode *macro;
- _cpp_buff *buff;
- const cpp_token **first;
- unsigned int count;
-{
- cpp_context *context = next_context (pfile);
-
- context->direct_p = false;
- context->macro = macro;
- context->buff = buff;
- context->first.ptoken = first;
- context->last.ptoken = first + count;
-}
-
-/* Push a list of tokens. */
-static void
-push_token_context (pfile, macro, first, count)
- cpp_reader *pfile;
- cpp_hashnode *macro;
- const cpp_token *first;
- unsigned int count;
-{
- cpp_context *context = next_context (pfile);
-
- context->direct_p = true;
- context->macro = macro;
- context->buff = NULL;
- context->first.token = first;
- context->last.token = first + count;
-}
-
-/* Expand an argument ARG before replacing parameters in a
- function-like macro. This works by pushing a context with the
- argument's tokens, and then expanding that into a temporary buffer
- as if it were a normal part of the token stream. collect_args()
- has terminated the argument's tokens with a CPP_EOF so that we know
- when we have fully expanded the argument. */
-static void
-expand_arg (pfile, arg)
- cpp_reader *pfile;
- macro_arg *arg;
-{
- unsigned int capacity;
-
- if (arg->count == 0)
- return;
-
- /* Loop, reading in the arguments. */
- capacity = 256;
- arg->expanded = (const cpp_token **)
- xmalloc (capacity * sizeof (cpp_token *));
-
- push_ptoken_context (pfile, NULL, NULL, arg->first, arg->count + 1);
- for (;;)
- {
- const cpp_token *token;
-
- if (arg->expanded_count + 1 >= capacity)
- {
- capacity *= 2;
- arg->expanded = (const cpp_token **)
- xrealloc (arg->expanded, capacity * sizeof (cpp_token *));
- }
-
- token = cpp_get_token (pfile);
-
- if (token->type == CPP_EOF)
- break;
-
- arg->expanded[arg->expanded_count++] = token;
- }
-
- _cpp_pop_context (pfile);
-}
-
-/* Pop the current context off the stack, re-enabling the macro if the
- context represented a macro's replacement list. The context
- structure is not freed so that we can re-use it later. */
-void
-_cpp_pop_context (pfile)
- cpp_reader *pfile;
-{
- cpp_context *context = pfile->context;
-
- if (context->macro)
- context->macro->flags &= ~NODE_DISABLED;
-
- if (context->buff)
- _cpp_release_buff (pfile, context->buff);
-
- pfile->context = context->prev;
-}
-
-/* Eternal routine to get a token. Also used nearly everywhere
- internally, except for places where we know we can safely call
- the lexer directly, such as lexing a directive name.
-
- Macro expansions and directives are transparently handled,
- including entering included files. Thus tokens are post-macro
- expansion, and after any intervening directives. External callers
- see CPP_EOF only at EOF. Internal callers also see it when meeting
- a directive inside a macro call, when at the end of a directive and
- state.in_directive is still 1, and at the end of argument
- pre-expansion. */
-const cpp_token *
-cpp_get_token (pfile)
- cpp_reader *pfile;
-{
- const cpp_token *result;
-
- for (;;)
- {
- cpp_hashnode *node;
- cpp_context *context = pfile->context;
-
- /* Context->prev == 0 <=> base context. */
- if (!context->prev)
- result = _cpp_lex_token (pfile);
- else if (context->first.token != context->last.token)
- {
- if (context->direct_p)
- result = context->first.token++;
- else
- result = *context->first.ptoken++;
-
- if (result->flags & PASTE_LEFT)
- {
- paste_all_tokens (pfile, result);
- if (pfile->state.in_directive)
- continue;
- return padding_token (pfile, result);
- }
- }
- else
- {
- _cpp_pop_context (pfile);
- if (pfile->state.in_directive)
- continue;
- return &pfile->avoid_paste;
- }
-
- if (result->type != CPP_NAME)
- break;
-
- node = result->val.node;
-
- if (node->type != NT_MACRO || (result->flags & NO_EXPAND))
- break;
-
- if (!(node->flags & NODE_DISABLED))
- {
- if (!pfile->state.prevent_expansion
- && enter_macro_context (pfile, node))
- {
- if (pfile->state.in_directive)
- continue;
- return padding_token (pfile, result);
- }
- }
- else
- {
- /* Flag this token as always unexpandable. FIXME: move this
- to collect_args()?. */
- cpp_token *t = _cpp_temp_token (pfile);
- t->type = result->type;
- t->flags = result->flags | NO_EXPAND;
- t->val.str = result->val.str;
- result = t;
- }
-
- break;
- }
-
- return result;
-}
-
-/* Returns true if we're expanding an object-like macro that was
- defined in a system header. Just checks the macro at the top of
- the stack. Used for diagnostic suppression. */
-int
-cpp_sys_macro_p (pfile)
- cpp_reader *pfile;
-{
- cpp_hashnode *node = pfile->context->macro;
-
- return node && node->value.macro && node->value.macro->syshdr;
-}
-
-/* Read each token in, until EOF. Directives are transparently
- processed. */
-void
-cpp_scan_nooutput (pfile)
- cpp_reader *pfile;
-{
- while (cpp_get_token (pfile)->type != CPP_EOF)
- ;
-}
-
-/* Step back one (or more) tokens. Can only step mack more than 1 if
- they are from the lexer, and not from macro expansion. */
-void
-_cpp_backup_tokens (pfile, count)
- cpp_reader *pfile;
- unsigned int count;
-{
- if (pfile->context->prev == NULL)
- {
- pfile->lookaheads += count;
- while (count--)
- {
- pfile->cur_token--;
- if (pfile->cur_token == pfile->cur_run->base
- /* Possible with -fpreprocessed and no leading #line. */
- && pfile->cur_run->prev != NULL)
- {
- pfile->cur_run = pfile->cur_run->prev;
- pfile->cur_token = pfile->cur_run->limit;
- }
- }
- }
- else
- {
- if (count != 1)
- abort ();
- if (pfile->context->direct_p)
- pfile->context->first.token--;
- else
- pfile->context->first.ptoken--;
- }
-}
-
-/* #define directive parsing and handling. */
-
-/* Returns non-zero if a macro redefinition warning is required. */
-static int
-warn_of_redefinition (node, macro2)
- const cpp_hashnode *node;
- const cpp_macro *macro2;
-{
- const cpp_macro *macro1;
- unsigned int i;
-
- /* Some redefinitions need to be warned about regardless. */
- if (node->flags & NODE_WARN)
- return 1;
-
- /* Redefinition of a macro is allowed if and only if the old and new
- definitions are the same. (6.10.3 paragraph 2). */
- macro1 = node->value.macro;
-
- /* The quick failures. */
- if (macro1->count != macro2->count
- || macro1->paramc != macro2->paramc
- || macro1->fun_like != macro2->fun_like
- || macro1->variadic != macro2->variadic)
- return 1;
-
- /* Check each token. */
- for (i = 0; i < macro1->count; i++)
- if (! _cpp_equiv_tokens (¯o1->expansion[i], ¯o2->expansion[i]))
- return 1;
-
- /* Check parameter spellings. */
- for (i = 0; i < macro1->paramc; i++)
- if (macro1->params[i] != macro2->params[i])
- return 1;
-
- return 0;
-}
-
-/* Free the definition of hashnode H. */
-void
-_cpp_free_definition (h)
- cpp_hashnode *h;
-{
- /* Macros and assertions no longer have anything to free. */
- h->type = NT_VOID;
- /* Clear builtin flag in case of redefinition. */
- h->flags &= ~(NODE_BUILTIN | NODE_DISABLED);
-}
-
-/* Save parameter NODE to the parameter list of macro MACRO. Returns
- zero on success, non-zero if the parameter is a duplicate. */
-static int
-save_parameter (pfile, macro, node)
- cpp_reader *pfile;
- cpp_macro *macro;
- cpp_hashnode *node;
-{
- /* Constraint 6.10.3.6 - duplicate parameter names. */
- if (node->arg_index)
- {
- cpp_error (pfile, "duplicate macro parameter \"%s\"", NODE_NAME (node));
- return 1;
- }
-
- if (BUFF_ROOM (pfile->a_buff)
- < (macro->paramc + 1) * sizeof (cpp_hashnode *))
- _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_hashnode *));
-
- ((cpp_hashnode **) BUFF_FRONT (pfile->a_buff))[macro->paramc++] = node;
- node->arg_index = macro->paramc;
- return 0;
-}
-
-/* Check the syntax of the parameters in a MACRO definition. */
-static int
-parse_params (pfile, macro)
- cpp_reader *pfile;
- cpp_macro *macro;
-{
- unsigned int prev_ident = 0;
-
- for (;;)
- {
- const cpp_token *token = _cpp_lex_token (pfile);
-
- switch (token->type)
- {
- default:
- cpp_error (pfile, "\"%s\" may not appear in macro parameter list",
- cpp_token_as_text (pfile, token));
- return 0;
-
- case CPP_NAME:
- if (prev_ident)
- {
- cpp_error (pfile, "macro parameters must be comma-separated");
- return 0;
- }
- prev_ident = 1;
-
- if (save_parameter (pfile, macro, token->val.node))
- return 0;
- continue;
-
- case CPP_CLOSE_PAREN:
- if (prev_ident || macro->paramc == 0)
- return 1;
-
- /* Fall through to pick up the error. */
- case CPP_COMMA:
- if (!prev_ident)
- {
- cpp_error (pfile, "parameter name missing");
- return 0;
- }
- prev_ident = 0;
- continue;
-
- case CPP_ELLIPSIS:
- macro->variadic = 1;
- if (!prev_ident)
- {
- save_parameter (pfile, macro, pfile->spec_nodes.n__VA_ARGS__);
- pfile->state.va_args_ok = 1;
- if (! CPP_OPTION (pfile, c99) && CPP_OPTION (pfile, pedantic))
- cpp_pedwarn (pfile,
- "anonymous variadic macros were introduced in C99");
- }
- else if (CPP_OPTION (pfile, pedantic))
- cpp_pedwarn (pfile, "ISO C does not permit named variadic macros");
-
- /* We're at the end, and just expect a closing parenthesis. */
- token = _cpp_lex_token (pfile);
- if (token->type == CPP_CLOSE_PAREN)
- return 1;
- /* Fall through. */
-
- case CPP_EOF:
- cpp_error (pfile, "missing ')' in macro parameter list");
- return 0;
- }
- }
-}
-
-/* Allocate room for a token from a macro's replacement list. */
-static cpp_token *
-alloc_expansion_token (pfile, macro)
- cpp_reader *pfile;
- cpp_macro *macro;
-{
- if (BUFF_ROOM (pfile->a_buff) < (macro->count + 1) * sizeof (cpp_token))
- _cpp_extend_buff (pfile, &pfile->a_buff, sizeof (cpp_token));
-
- return &((cpp_token *) BUFF_FRONT (pfile->a_buff))[macro->count++];
-}
-
-/* Lex a token from the expansion of MACRO, but mark parameters as we
- find them and warn of traditional stringification. */
-static cpp_token *
-lex_expansion_token (pfile, macro)
- cpp_reader *pfile;
- cpp_macro *macro;
-{
- cpp_token *token;
-
- pfile->cur_token = alloc_expansion_token (pfile, macro);
- token = _cpp_lex_direct (pfile);
-
- /* Is this a parameter? */
- if (token->type == CPP_NAME && token->val.node->arg_index)
- {
- token->type = CPP_MACRO_ARG;
- token->val.arg_no = token->val.node->arg_index;
- }
- else if (CPP_WTRADITIONAL (pfile) && macro->paramc > 0
- && (token->type == CPP_STRING || token->type == CPP_CHAR))
- check_trad_stringification (pfile, macro, &token->val.str);
-
- return token;
-}
-
-/* Parse a macro and save its expansion. Returns non-zero on success. */
-int
-_cpp_create_definition (pfile, node)
- cpp_reader *pfile;
- cpp_hashnode *node;
-{
- cpp_macro *macro;
- cpp_token *token, *saved_cur_token;
- const cpp_token *ctoken;
- unsigned int i, ok = 1;
-
- macro = (cpp_macro *) _cpp_aligned_alloc (pfile, sizeof (cpp_macro));
- macro->line = pfile->directive_line;
- macro->params = 0;
- macro->paramc = 0;
- macro->variadic = 0;
- macro->count = 0;
- macro->fun_like = 0;
-
- /* Get the first token of the expansion (or the '(' of a
- function-like macro). */
- ctoken = _cpp_lex_token (pfile);
-
- if (ctoken->type == CPP_OPEN_PAREN && !(ctoken->flags & PREV_WHITE))
- {
- ok = parse_params (pfile, macro);
- macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff);
- if (!ok)
- goto cleanup2;
-
- /* Success. Commit the parameter array. */
- BUFF_FRONT (pfile->a_buff) = (U_CHAR *) ¯o->params[macro->paramc];
- macro->fun_like = 1;
- }
- else if (ctoken->type != CPP_EOF && !(ctoken->flags & PREV_WHITE))
- cpp_pedwarn (pfile, "ISO C requires whitespace after the macro name");
-
- saved_cur_token = pfile->cur_token;
-
- if (macro->fun_like)
- token = lex_expansion_token (pfile, macro);
- else
- {
- token = alloc_expansion_token (pfile, macro);
- *token = *ctoken;
- }
-
- for (;;)
- {
- /* Check the stringifying # constraint 6.10.3.2.1 of
- function-like macros when lexing the subsequent token. */
- if (macro->count > 1 && token[-1].type == CPP_HASH && macro->fun_like)
- {
- if (token->type == CPP_MACRO_ARG)
- {
- token->flags &= ~PREV_WHITE;
- token->flags |= STRINGIFY_ARG;
- token->flags |= token[-1].flags & PREV_WHITE;
- token[-1] = token[0];
- macro->count--;
- }
- /* Let assembler get away with murder. */
- else if (CPP_OPTION (pfile, lang) != CLK_ASM)
- {
- ok = 0;
- cpp_error (pfile, "'#' is not followed by a macro parameter");
- goto cleanup1;
- }
- }
-
- if (token->type == CPP_EOF)
- break;
-
- /* Paste operator constraint 6.10.3.3.1. */
- if (token->type == CPP_PASTE)
- {
- /* Token-paste ##, can appear in both object-like and
- function-like macros, but not at the ends. */
- if (--macro->count > 0)
- token = lex_expansion_token (pfile, macro);
-
- if (macro->count == 0 || token->type == CPP_EOF)
- {
- ok = 0;
- cpp_error (pfile,
- "'##' cannot appear at either end of a macro expansion");
- goto cleanup1;
- }
-
- token[-1].flags |= PASTE_LEFT;
- }
-
- token = lex_expansion_token (pfile, macro);
- }
-
- macro->expansion = (cpp_token *) BUFF_FRONT (pfile->a_buff);
-
- /* Don't count the CPP_EOF. */
- macro->count--;
-
- /* Clear whitespace on first token for warn_of_redefinition(). */
- if (macro->count)
- macro->expansion[0].flags &= ~PREV_WHITE;
-
- /* Commit the memory. */
- BUFF_FRONT (pfile->a_buff) = (U_CHAR *) ¯o->expansion[macro->count];
-
- /* Implement the macro-defined-to-itself optimisation. */
- if (macro->count == 1 && !macro->fun_like
- && macro->expansion[0].type == CPP_NAME
- && macro->expansion[0].val.node == node)
- node->flags |= NODE_DISABLED;
-
- /* To suppress some diagnostics. */
- macro->syshdr = pfile->map->sysp != 0;
-
- if (node->type != NT_VOID)
- {
- if (warn_of_redefinition (node, macro))
- {
- cpp_pedwarn_with_line (pfile, pfile->directive_line, 0,
- "\"%s\" redefined", NODE_NAME (node));
-
- if (node->type == NT_MACRO && !(node->flags & NODE_BUILTIN))
- cpp_pedwarn_with_line (pfile, node->value.macro->line, 0,
- "this is the location of the previous definition");
- }
- _cpp_free_definition (node);
- }
-
- /* Enter definition in hash table. */
- node->type = NT_MACRO;
- node->value.macro = macro;
- if (! ustrncmp (NODE_NAME (node), DSC ("__STDC_")))
- node->flags |= NODE_WARN;
-
- cleanup1:
-
- /* Set type for SEEN_EOL() in cpplib.c, restore the lexer position. */
- saved_cur_token[-1].type = pfile->cur_token[-1].type;
- pfile->cur_token = saved_cur_token;
-
- cleanup2:
-
- /* Stop the lexer accepting __VA_ARGS__. */
- pfile->state.va_args_ok = 0;
-
- /* Clear the fast argument lookup indices. */
- for (i = macro->paramc; i-- > 0; )
- macro->params[i]->arg_index = 0;
-
- return ok;
-}
-
-/* Warn if a token in STRING matches one of a function-like MACRO's
- parameters. */
-static void
-check_trad_stringification (pfile, macro, string)
- cpp_reader *pfile;
- const cpp_macro *macro;
- const cpp_string *string;
-{
- unsigned int i, len;
- const U_CHAR *p, *q, *limit = string->text + string->len;
-
- /* Loop over the string. */
- for (p = string->text; p < limit; p = q)
- {
- /* Find the start of an identifier. */
- while (p < limit && !is_idstart (*p))
- p++;
-
- /* Find the end of the identifier. */
- q = p;
- while (q < limit && is_idchar (*q))
- q++;
-
- len = q - p;
-
- /* Loop over the function macro arguments to see if the
- identifier inside the string matches one of them. */
- for (i = 0; i < macro->paramc; i++)
- {
- const cpp_hashnode *node = macro->params[i];
-
- if (NODE_LEN (node) == len
- && !memcmp (p, NODE_NAME (node), len))
- {
- cpp_warning (pfile,
- "macro argument \"%s\" would be stringified with -traditional",
- NODE_NAME (node));
- break;
- }
- }
- }
-}
-
-/* Returns the name, arguments and expansion of a macro, in a format
- suitable to be read back in again, and therefore also for DWARF 2
- debugging info. e.g. "PASTE(X, Y) X ## Y", or "MACNAME EXPANSION".
- Caller is expected to generate the "#define" bit if needed. The
- returned text is temporary, and automatically freed later. */
-const unsigned char *
-cpp_macro_definition (pfile, node)
- cpp_reader *pfile;
- const cpp_hashnode *node;
-{
- unsigned int i, len;
- const cpp_macro *macro = node->value.macro;
- unsigned char *buffer;
-
- if (node->type != NT_MACRO || (node->flags & NODE_BUILTIN))
- {
- cpp_ice (pfile, "invalid hash type %d in cpp_macro_definition", node->type);
- return 0;
- }
-
- /* Calculate length. */
- len = NODE_LEN (node) + 2; /* ' ' and NUL. */
- if (macro->fun_like)
- {
- len += 4; /* "()" plus possible final ".." of named
- varargs (we have + 1 below). */
- for (i = 0; i < macro->paramc; i++)
- len += NODE_LEN (macro->params[i]) + 1; /* "," */
- }
-
- for (i = 0; i < macro->count; i++)
- {
- cpp_token *token = ¯o->expansion[i];
-
- if (token->type == CPP_MACRO_ARG)
- len += NODE_LEN (macro->params[token->val.arg_no - 1]);
- else
- len += cpp_token_len (token); /* Includes room for ' '. */
- if (token->flags & STRINGIFY_ARG)
- len++; /* "#" */
- if (token->flags & PASTE_LEFT)
- len += 3; /* " ##" */
- }
-
- if (len > pfile->macro_buffer_len)
- {
- pfile->macro_buffer = (U_CHAR *) xrealloc (pfile->macro_buffer, len);
- pfile->macro_buffer_len = len;
- }
-
- /* Fill in the buffer. Start with the macro name. */
- buffer = pfile->macro_buffer;
- memcpy (buffer, NODE_NAME (node), NODE_LEN (node));
- buffer += NODE_LEN (node);
-
- /* Parameter names. */
- if (macro->fun_like)
- {
- *buffer++ = '(';
- for (i = 0; i < macro->paramc; i++)
- {
- cpp_hashnode *param = macro->params[i];
-
- if (param != pfile->spec_nodes.n__VA_ARGS__)
- {
- memcpy (buffer, NODE_NAME (param), NODE_LEN (param));
- buffer += NODE_LEN (param);
- }
-
- if (i + 1 < macro->paramc)
- /* Don't emit a space after the comma here; we're trying
- to emit a Dwarf-friendly definition, and the Dwarf spec
- forbids spaces in the argument list. */
- *buffer++ = ',';
- else if (macro->variadic)
- *buffer++ = '.', *buffer++ = '.', *buffer++ = '.';
- }
- *buffer++ = ')';
- }
-
- /* The Dwarf spec requires a space after the macro name, even if the
- definition is the empty string. */
- *buffer++ = ' ';
-
- /* Expansion tokens. */
- if (macro->count)
- {
- for (i = 0; i < macro->count; i++)
- {
- cpp_token *token = ¯o->expansion[i];
-
- if (token->flags & PREV_WHITE)
- *buffer++ = ' ';
- if (token->flags & STRINGIFY_ARG)
- *buffer++ = '#';
-
- if (token->type == CPP_MACRO_ARG)
- {
- len = NODE_LEN (macro->params[token->val.arg_no - 1]);
- memcpy (buffer,
- NODE_NAME (macro->params[token->val.arg_no - 1]), len);
- buffer += len;
- }
- else
- buffer = cpp_spell_token (pfile, token, buffer);
-
- if (token->flags & PASTE_LEFT)
- {
- *buffer++ = ' ';
- *buffer++ = '#';
- *buffer++ = '#';
- /* Next has PREV_WHITE; see _cpp_create_definition. */
- }
- }
- }
-
- *buffer = '\0';
- return pfile->macro_buffer;
-}
projects / msp430-gcc.git / blobdiff