aboutsummaryrefslogtreecommitdiffstats
path: root/gcc-4.2.1-5666.3/libcpp/traditional.c
diff options
context:
space:
mode:
Diffstat (limited to 'gcc-4.2.1-5666.3/libcpp/traditional.c')
-rw-r--r--gcc-4.2.1-5666.3/libcpp/traditional.c1113
1 files changed, 0 insertions, 1113 deletions
diff --git a/gcc-4.2.1-5666.3/libcpp/traditional.c b/gcc-4.2.1-5666.3/libcpp/traditional.c
deleted file mode 100644
index a543348d9..000000000
--- a/gcc-4.2.1-5666.3/libcpp/traditional.c
+++ /dev/null
@@ -1,1113 +0,0 @@
-/* CPP Library - traditional lexical analysis and macro expansion.
- Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
- Contributed by Neil Booth, May 2002
-
-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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-#include "config.h"
-#include "system.h"
-#include "cpplib.h"
-#include "internal.h"
-
-/* The replacement text of a function-like macro is stored as a
- contiguous sequence of aligned blocks, each representing the text
- between subsequent parameters.
-
- Each block comprises the text between its surrounding parameters,
- the length of that text, and the one-based index of the following
- parameter. The final block in the replacement text is easily
- recognizable as it has an argument index of zero. */
-
-struct block
-{
- unsigned int text_len;
- unsigned short arg_index;
- uchar text[1];
-};
-
-#define BLOCK_HEADER_LEN offsetof (struct block, text)
-#define BLOCK_LEN(TEXT_LEN) CPP_ALIGN (BLOCK_HEADER_LEN + (TEXT_LEN))
-
-/* Structure holding information about a function-like macro
- invocation. */
-struct fun_macro
-{
- /* Memory buffer holding the trad_arg array. */
- _cpp_buff *buff;
-
- /* An array of size the number of macro parameters + 1, containing
- the offsets of the start of each macro argument in the output
- buffer. The argument continues until the character before the
- start of the next one. */
- size_t *args;
-
- /* The hashnode of the macro. */
- cpp_hashnode *node;
-
- /* The offset of the macro name in the output buffer. */
- size_t offset;
-
- /* The line the macro name appeared on. */
- unsigned int line;
-
- /* Zero-based index of argument being currently lexed. */
- unsigned int argc;
-};
-
-/* Lexing state. It is mostly used to prevent macro expansion. */
-enum ls {ls_none = 0, /* Normal state. */
- ls_fun_open, /* When looking for '('. */
- ls_fun_close, /* When looking for ')'. */
- ls_defined, /* After defined. */
- ls_defined_close, /* Looking for ')' of defined(). */
- ls_hash, /* After # in preprocessor conditional. */
- ls_predicate, /* After the predicate, maybe paren? */
- ls_answer}; /* In answer to predicate. */
-
-/* Lexing TODO: Maybe handle space in escaped newlines. Stop lex.c
- from recognizing comments and directives during its lexing pass. */
-
-static const uchar *skip_whitespace (cpp_reader *, const uchar *, int);
-static cpp_hashnode *lex_identifier (cpp_reader *, const uchar *);
-static const uchar *copy_comment (cpp_reader *, const uchar *, int);
-static void check_output_buffer (cpp_reader *, size_t);
-static void push_replacement_text (cpp_reader *, cpp_hashnode *);
-static bool scan_parameters (cpp_reader *, cpp_macro *);
-static bool recursive_macro (cpp_reader *, cpp_hashnode *);
-static void save_replacement_text (cpp_reader *, cpp_macro *, unsigned int);
-static void maybe_start_funlike (cpp_reader *, cpp_hashnode *, const uchar *,
- struct fun_macro *);
-static void save_argument (struct fun_macro *, size_t);
-static void replace_args_and_push (cpp_reader *, struct fun_macro *);
-static size_t canonicalize_text (uchar *, const uchar *, size_t, uchar *);
-
-/* Ensures we have N bytes' space in the output buffer, and
- reallocates it if not. */
-static void
-check_output_buffer (cpp_reader *pfile, size_t n)
-{
- /* We might need two bytes to terminate an unterminated comment, and
- one more to terminate the line with a NUL. */
- n += 2 + 1;
-
- if (n > (size_t) (pfile->out.limit - pfile->out.cur))
- {
- size_t size = pfile->out.cur - pfile->out.base;
- size_t new_size = (size + n) * 3 / 2;
-
- pfile->out.base = XRESIZEVEC (unsigned char, pfile->out.base, new_size);
- pfile->out.limit = pfile->out.base + new_size;
- pfile->out.cur = pfile->out.base + size;
- }
-}
-
-/* Skip a C-style block comment in a macro as a result of -CC.
- Buffer->cur points to the initial asterisk of the comment. */
-static void
-skip_macro_block_comment (cpp_reader *pfile)
-{
- const uchar *cur = pfile->buffer->cur;
-
- cur++;
- if (*cur == '/')
- cur++;
-
- /* People like decorating comments with '*', so check for '/'
- instead for efficiency. */
- while(! (*cur++ == '/' && cur[-2] == '*') )
- ;
-
- pfile->buffer->cur = cur;
-}
-
-/* CUR points to the asterisk introducing a comment in the current
- context. IN_DEFINE is true if we are in the replacement text of a
- macro.
-
- The asterisk and following comment is copied to the buffer pointed
- to by pfile->out.cur, which must be of sufficient size.
- Unterminated comments are diagnosed, and correctly terminated in
- the output. pfile->out.cur is updated depending upon IN_DEFINE,
- -C, -CC and pfile->state.in_directive.
-
- Returns a pointer to the first character after the comment in the
- input buffer. */
-static const uchar *
-copy_comment (cpp_reader *pfile, const uchar *cur, int in_define)
-{
- bool unterminated, copy = false;
- source_location src_loc = pfile->line_table->highest_line;
- cpp_buffer *buffer = pfile->buffer;
-
- buffer->cur = cur;
- if (pfile->context->prev)
- unterminated = false, skip_macro_block_comment (pfile);
- else
- unterminated = _cpp_skip_block_comment (pfile);
-
- if (unterminated)
- cpp_error_with_line (pfile, CPP_DL_ERROR, src_loc, 0,
- "unterminated comment");
-
- /* Comments in directives become spaces so that tokens are properly
- separated when the ISO preprocessor re-lexes the line. The
- exception is #define. */
- if (pfile->state.in_directive)
- {
- if (in_define)
- {
- if (CPP_OPTION (pfile, discard_comments_in_macro_exp))
- pfile->out.cur--;
- else
- copy = true;
- }
- else
- pfile->out.cur[-1] = ' ';
- }
- else if (CPP_OPTION (pfile, discard_comments))
- pfile->out.cur--;
- else
- copy = true;
-
- if (copy)
- {
- size_t len = (size_t) (buffer->cur - cur);
- memcpy (pfile->out.cur, cur, len);
- pfile->out.cur += len;
- if (unterminated)
- {
- *pfile->out.cur++ = '*';
- *pfile->out.cur++ = '/';
- }
- }
-
- return buffer->cur;
-}
-
-/* CUR points to any character in the input buffer. Skips over all
- contiguous horizontal white space and NULs, including comments if
- SKIP_COMMENTS, until reaching the first non-horizontal-whitespace
- character or the end of the current context. Escaped newlines are
- removed.
-
- The whitespace is copied verbatim to the output buffer, except that
- comments are handled as described in copy_comment().
- pfile->out.cur is updated.
-
- Returns a pointer to the first character after the whitespace in
- the input buffer. */
-static const uchar *
-skip_whitespace (cpp_reader *pfile, const uchar *cur, int skip_comments)
-{
- uchar *out = pfile->out.cur;
-
- for (;;)
- {
- unsigned int c = *cur++;
- *out++ = c;
-
- if (is_nvspace (c))
- continue;
-
- if (c == '/' && *cur == '*' && skip_comments)
- {
- pfile->out.cur = out;
- cur = copy_comment (pfile, cur, false /* in_define */);
- out = pfile->out.cur;
- continue;
- }
-
- out--;
- break;
- }
-
- pfile->out.cur = out;
- return cur - 1;
-}
-
-/* Lexes and outputs an identifier starting at CUR, which is assumed
- to point to a valid first character of an identifier. Returns
- the hashnode, and updates out.cur. */
-static cpp_hashnode *
-lex_identifier (cpp_reader *pfile, const uchar *cur)
-{
- size_t len;
- uchar *out = pfile->out.cur;
- cpp_hashnode *result;
-
- do
- *out++ = *cur++;
- while (is_numchar (*cur));
-
- CUR (pfile->context) = cur;
- len = out - pfile->out.cur;
- result = (cpp_hashnode *) ht_lookup (pfile->hash_table, pfile->out.cur,
- len, HT_ALLOC);
- pfile->out.cur = out;
- return result;
-}
-
-/* Overlays the true file buffer temporarily with text of length LEN
- starting at START. The true buffer is restored upon calling
- restore_buff(). */
-void
-_cpp_overlay_buffer (cpp_reader *pfile, const uchar *start, size_t len)
-{
- cpp_buffer *buffer = pfile->buffer;
-
- pfile->overlaid_buffer = buffer;
- pfile->saved_cur = buffer->cur;
- pfile->saved_rlimit = buffer->rlimit;
- pfile->saved_line_base = buffer->next_line;
- buffer->need_line = false;
-
- buffer->cur = start;
- buffer->line_base = start;
- buffer->rlimit = start + len;
-}
-
-/* Restores a buffer overlaid by _cpp_overlay_buffer(). */
-void
-_cpp_remove_overlay (cpp_reader *pfile)
-{
- cpp_buffer *buffer = pfile->overlaid_buffer;
-
- buffer->cur = pfile->saved_cur;
- buffer->rlimit = pfile->saved_rlimit;
- buffer->line_base = pfile->saved_line_base;
- buffer->need_line = true;
-
- pfile->overlaid_buffer = NULL;
-}
-
-/* Reads a logical line into the output buffer. Returns TRUE if there
- is more text left in the buffer. */
-bool
-_cpp_read_logical_line_trad (cpp_reader *pfile)
-{
- do
- {
- if (pfile->buffer->need_line && !_cpp_get_fresh_line (pfile))
- return false;
- }
- while (!_cpp_scan_out_logical_line (pfile, NULL) || pfile->state.skipping);
-
- return pfile->buffer != NULL;
-}
-
-/* Set up state for finding the opening '(' of a function-like
- macro. */
-static void
-maybe_start_funlike (cpp_reader *pfile, cpp_hashnode *node, const uchar *start, struct fun_macro *macro)
-{
- unsigned int n = node->value.macro->paramc + 1;
-
- if (macro->buff)
- _cpp_release_buff (pfile, macro->buff);
- macro->buff = _cpp_get_buff (pfile, n * sizeof (size_t));
- macro->args = (size_t *) BUFF_FRONT (macro->buff);
- macro->node = node;
- macro->offset = start - pfile->out.base;
- macro->argc = 0;
-}
-
-/* Save the OFFSET of the start of the next argument to MACRO. */
-static void
-save_argument (struct fun_macro *macro, size_t offset)
-{
- macro->argc++;
- if (macro->argc <= macro->node->value.macro->paramc)
- macro->args[macro->argc] = offset;
-}
-
-/* Copies the next logical line in the current buffer (starting at
- buffer->cur) to the output buffer. The output is guaranteed to
- terminate with a NUL character. buffer->cur is updated.
-
- If MACRO is non-NULL, then we are scanning the replacement list of
- MACRO, and we call save_replacement_text() every time we meet an
- argument. */
-bool
-_cpp_scan_out_logical_line (cpp_reader *pfile, cpp_macro *macro)
-{
- bool result = true;
- cpp_context *context;
- const uchar *cur;
- uchar *out;
- struct fun_macro fmacro;
- unsigned int c, paren_depth = 0, quote;
- enum ls lex_state = ls_none;
- bool header_ok;
- const uchar *start_of_input_line;
-
- fmacro.buff = NULL;
-
- quote = 0;
- header_ok = pfile->state.angled_headers;
- CUR (pfile->context) = pfile->buffer->cur;
- RLIMIT (pfile->context) = pfile->buffer->rlimit;
- pfile->out.cur = pfile->out.base;
- pfile->out.first_line = pfile->line_table->highest_line;
- /* start_of_input_line is needed to make sure that directives really,
- really start at the first character of the line. */
- start_of_input_line = pfile->buffer->cur;
- new_context:
- context = pfile->context;
- cur = CUR (context);
- check_output_buffer (pfile, RLIMIT (context) - cur);
- out = pfile->out.cur;
-
- for (;;)
- {
- if (!context->prev
- && cur >= pfile->buffer->notes[pfile->buffer->cur_note].pos)
- {
- pfile->buffer->cur = cur;
- _cpp_process_line_notes (pfile, false);
- }
- c = *cur++;
- *out++ = c;
-
- /* Whitespace should "continue" out of the switch,
- non-whitespace should "break" out of it. */
- switch (c)
- {
- case ' ':
- case '\t':
- case '\f':
- case '\v':
- case '\0':
- continue;
-
- case '\n':
- /* If this is a macro's expansion, pop it. */
- if (context->prev)
- {
- pfile->out.cur = out - 1;
- _cpp_pop_context (pfile);
- goto new_context;
- }
-
- /* Omit the newline from the output buffer. */
- pfile->out.cur = out - 1;
- pfile->buffer->cur = cur;
- pfile->buffer->need_line = true;
- CPP_INCREMENT_LINE (pfile, 0);
-
- if ((lex_state == ls_fun_open || lex_state == ls_fun_close)
- && !pfile->state.in_directive
- && _cpp_get_fresh_line (pfile))
- {
- /* Newlines in arguments become a space, but we don't
- clear any in-progress quote. */
- if (lex_state == ls_fun_close)
- out[-1] = ' ';
- cur = pfile->buffer->cur;
- continue;
- }
- goto done;
-
- case '<':
- if (header_ok)
- quote = '>';
- break;
- case '>':
- if (c == quote)
- quote = 0;
- break;
-
- case '"':
- case '\'':
- if (c == quote)
- quote = 0;
- else if (!quote)
- quote = c;
- break;
-
- case '\\':
- /* Skip escaped quotes here, it's easier than above. */
- if (*cur == '\\' || *cur == '"' || *cur == '\'')
- *out++ = *cur++;
- break;
-
- case '/':
- /* Traditional CPP does not recognize comments within
- literals. */
- if (!quote && *cur == '*')
- {
- pfile->out.cur = out;
- cur = copy_comment (pfile, cur, macro != 0);
- out = pfile->out.cur;
- continue;
- }
- break;
-
- case '_':
- case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
- case 'g': case 'h': case 'i': case 'j': case 'k': case 'l':
- case 'm': case 'n': case 'o': case 'p': case 'q': case 'r':
- case 's': case 't': case 'u': case 'v': case 'w': case 'x':
- case 'y': case 'z':
- case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
- case 'G': case 'H': case 'I': case 'J': case 'K': case 'L':
- case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R':
- case 'S': case 'T': case 'U': case 'V': case 'W': case 'X':
- case 'Y': case 'Z':
- if (!pfile->state.skipping && (quote == 0 || macro))
- {
- cpp_hashnode *node;
- uchar *out_start = out - 1;
-
- pfile->out.cur = out_start;
- node = lex_identifier (pfile, cur - 1);
- out = pfile->out.cur;
- cur = CUR (context);
-
- if (node->type == NT_MACRO
- /* Should we expand for ls_answer? */
- && (lex_state == ls_none || lex_state == ls_fun_open)
- && !pfile->state.prevent_expansion)
- {
- /* Macros invalidate MI optimization. */
- pfile->mi_valid = false;
- if (! (node->flags & NODE_BUILTIN)
- && node->value.macro->fun_like)
- {
- maybe_start_funlike (pfile, node, out_start, &fmacro);
- lex_state = ls_fun_open;
- fmacro.line = pfile->line_table->highest_line;
- continue;
- }
- else if (!recursive_macro (pfile, node))
- {
- /* Remove the object-like macro's name from the
- output, and push its replacement text. */
- pfile->out.cur = out_start;
- push_replacement_text (pfile, node);
- lex_state = ls_none;
- goto new_context;
- }
- }
- else if (macro && (node->flags & NODE_MACRO_ARG) != 0)
- {
- /* Found a parameter in the replacement text of a
- #define. Remove its name from the output. */
- pfile->out.cur = out_start;
- save_replacement_text (pfile, macro, node->value.arg_index);
- out = pfile->out.base;
- }
- else if (lex_state == ls_hash)
- {
- lex_state = ls_predicate;
- continue;
- }
- else if (pfile->state.in_expression
- && node == pfile->spec_nodes.n_defined)
- {
- lex_state = ls_defined;
- continue;
- }
- }
- break;
-
- case '(':
- if (quote == 0)
- {
- paren_depth++;
- if (lex_state == ls_fun_open)
- {
- if (recursive_macro (pfile, fmacro.node))
- lex_state = ls_none;
- else
- {
- lex_state = ls_fun_close;
- paren_depth = 1;
- out = pfile->out.base + fmacro.offset;
- fmacro.args[0] = fmacro.offset;
- }
- }
- else if (lex_state == ls_predicate)
- lex_state = ls_answer;
- else if (lex_state == ls_defined)
- lex_state = ls_defined_close;
- }
- break;
-
- case ',':
- if (quote == 0 && lex_state == ls_fun_close && paren_depth == 1)
- save_argument (&fmacro, out - pfile->out.base);
- break;
-
- case ')':
- if (quote == 0)
- {
- paren_depth--;
- if (lex_state == ls_fun_close && paren_depth == 0)
- {
- cpp_macro *m = fmacro.node->value.macro;
-
- m->used = 1;
- lex_state = ls_none;
- save_argument (&fmacro, out - pfile->out.base);
-
- /* A single zero-length argument is no argument. */
- if (fmacro.argc == 1
- && m->paramc == 0
- && out == pfile->out.base + fmacro.offset + 1)
- fmacro.argc = 0;
-
- if (_cpp_arguments_ok (pfile, m, fmacro.node, fmacro.argc))
- {
- /* Remove the macro's invocation from the
- output, and push its replacement text. */
- pfile->out.cur = (pfile->out.base
- + fmacro.offset);
- CUR (context) = cur;
- replace_args_and_push (pfile, &fmacro);
- goto new_context;
- }
- }
- else if (lex_state == ls_answer || lex_state == ls_defined_close)
- lex_state = ls_none;
- }
- break;
-
- case '#':
- if (cur - 1 == start_of_input_line
- /* A '#' from a macro doesn't start a directive. */
- && !pfile->context->prev
- && !pfile->state.in_directive)
- {
- /* A directive. With the way _cpp_handle_directive
- currently works, we only want to call it if either we
- know the directive is OK, or we want it to fail and
- be removed from the output. If we want it to be
- passed through (the assembler case) then we must not
- call _cpp_handle_directive. */
- pfile->out.cur = out;
- cur = skip_whitespace (pfile, cur, true /* skip_comments */);
- out = pfile->out.cur;
-
- if (*cur == '\n')
- {
- /* Null directive. Ignore it and don't invalidate
- the MI optimization. */
- pfile->buffer->need_line = true;
- CPP_INCREMENT_LINE (pfile, 0);
- result = false;
- goto done;
- }
- else
- {
- bool do_it = false;
-
- if (is_numstart (*cur)
- && CPP_OPTION (pfile, lang) != CLK_ASM)
- do_it = true;
- else if (is_idstart (*cur))
- /* Check whether we know this directive, but don't
- advance. */
- do_it = lex_identifier (pfile, cur)->is_directive;
-
- if (do_it || CPP_OPTION (pfile, lang) != CLK_ASM)
- {
- /* This is a kludge. We want to have the ISO
- preprocessor lex the next token. */
- pfile->buffer->cur = cur;
- _cpp_handle_directive (pfile, false /* indented */);
- result = false;
- goto done;
- }
- }
- }
-
- if (pfile->state.in_expression)
- {
- lex_state = ls_hash;
- continue;
- }
- break;
-
- default:
- break;
- }
-
- /* Non-whitespace disables MI optimization and stops treating
- '<' as a quote in #include. */
- header_ok = false;
- if (!pfile->state.in_directive)
- pfile->mi_valid = false;
-
- if (lex_state == ls_none)
- continue;
-
- /* Some of these transitions of state are syntax errors. The
- ISO preprocessor will issue errors later. */
- if (lex_state == ls_fun_open)
- /* Missing '('. */
- lex_state = ls_none;
- else if (lex_state == ls_hash
- || lex_state == ls_predicate
- || lex_state == ls_defined)
- lex_state = ls_none;
-
- /* ls_answer and ls_defined_close keep going until ')'. */
- }
-
- done:
- if (fmacro.buff)
- _cpp_release_buff (pfile, fmacro.buff);
-
- if (lex_state == ls_fun_close)
- cpp_error_with_line (pfile, CPP_DL_ERROR, fmacro.line, 0,
- "unterminated argument list invoking macro \"%s\"",
- NODE_NAME (fmacro.node));
- return result;
-}
-
-/* Push a context holding the replacement text of the macro NODE on
- the context stack. NODE is either object-like, or a function-like
- macro with no arguments. */
-static void
-push_replacement_text (cpp_reader *pfile, cpp_hashnode *node)
-{
- size_t len;
- const uchar *text;
- uchar *buf;
-
- if (node->flags & NODE_BUILTIN)
- {
- text = _cpp_builtin_macro_text (pfile, node);
- len = ustrlen (text);
- buf = _cpp_unaligned_alloc (pfile, len + 1);
- memcpy (buf, text, len);
- buf[len]='\n';
- text = buf;
- }
- else
- {
- cpp_macro *macro = node->value.macro;
- macro->used = 1;
- text = macro->exp.text;
- macro->traditional = 1;
- len = macro->count;
- }
-
- _cpp_push_text_context (pfile, node, text, len);
-}
-
-/* Returns TRUE if traditional macro recursion is detected. */
-static bool
-recursive_macro (cpp_reader *pfile, cpp_hashnode *node)
-{
- bool recursing = !!(node->flags & NODE_DISABLED);
-
- /* Object-like macros that are already expanding are necessarily
- recursive.
-
- However, it is possible to have traditional function-like macros
- that are not infinitely recursive but recurse to any given depth.
- Further, it is easy to construct examples that get ever longer
- until the point they stop recursing. So there is no easy way to
- detect true recursion; instead we assume any expansion more than
- 20 deep since the first invocation of this macro must be
- recursing. */
- if (recursing && node->value.macro->fun_like)
- {
- size_t depth = 0;
- cpp_context *context = pfile->context;
-
- do
- {
- depth++;
- if (context->macro == node && depth > 20)
- break;
- context = context->prev;
- }
- while (context);
- recursing = context != NULL;
- }
-
- if (recursing)
- cpp_error (pfile, CPP_DL_ERROR,
- "detected recursion whilst expanding macro \"%s\"",
- NODE_NAME (node));
-
- return recursing;
-}
-
-/* Return the length of the replacement text of a function-like or
- object-like non-builtin macro. */
-size_t
-_cpp_replacement_text_len (const cpp_macro *macro)
-{
- size_t len;
-
- if (macro->fun_like && (macro->paramc != 0))
- {
- const uchar *exp;
-
- len = 0;
- for (exp = macro->exp.text;;)
- {
- struct block *b = (struct block *) exp;
-
- len += b->text_len;
- if (b->arg_index == 0)
- break;
- len += NODE_LEN (macro->params[b->arg_index - 1]);
- exp += BLOCK_LEN (b->text_len);
- }
- }
- else
- len = macro->count;
-
- return len;
-}
-
-/* Copy the replacement text of MACRO to DEST, which must be of
- sufficient size. It is not NUL-terminated. The next character is
- returned. */
-uchar *
-_cpp_copy_replacement_text (const cpp_macro *macro, uchar *dest)
-{
- if (macro->fun_like && (macro->paramc != 0))
- {
- const uchar *exp;
-
- for (exp = macro->exp.text;;)
- {
- struct block *b = (struct block *) exp;
- cpp_hashnode *param;
-
- memcpy (dest, b->text, b->text_len);
- dest += b->text_len;
- if (b->arg_index == 0)
- break;
- param = macro->params[b->arg_index - 1];
- memcpy (dest, NODE_NAME (param), NODE_LEN (param));
- dest += NODE_LEN (param);
- exp += BLOCK_LEN (b->text_len);
- }
- }
- else
- {
- memcpy (dest, macro->exp.text, macro->count);
- dest += macro->count;
- }
-
- return dest;
-}
-
-/* Push a context holding the replacement text of the macro NODE on
- the context stack. NODE is either object-like, or a function-like
- macro with no arguments. */
-static void
-replace_args_and_push (cpp_reader *pfile, struct fun_macro *fmacro)
-{
- cpp_macro *macro = fmacro->node->value.macro;
-
- if (macro->paramc == 0)
- push_replacement_text (pfile, fmacro->node);
- else
- {
- const uchar *exp;
- uchar *p;
- _cpp_buff *buff;
- size_t len = 0;
-
- /* Calculate the length of the argument-replaced text. */
- for (exp = macro->exp.text;;)
- {
- struct block *b = (struct block *) exp;
-
- len += b->text_len;
- if (b->arg_index == 0)
- break;
- len += (fmacro->args[b->arg_index]
- - fmacro->args[b->arg_index - 1] - 1);
- exp += BLOCK_LEN (b->text_len);
- }
-
- /* Allocate room for the expansion plus \n. */
- buff = _cpp_get_buff (pfile, len + 1);
-
- /* Copy the expansion and replace arguments. */
- p = BUFF_FRONT (buff);
- for (exp = macro->exp.text;;)
- {
- struct block *b = (struct block *) exp;
- size_t arglen;
-
- memcpy (p, b->text, b->text_len);
- p += b->text_len;
- if (b->arg_index == 0)
- break;
- arglen = (fmacro->args[b->arg_index]
- - fmacro->args[b->arg_index - 1] - 1);
- memcpy (p, pfile->out.base + fmacro->args[b->arg_index - 1],
- arglen);
- p += arglen;
- exp += BLOCK_LEN (b->text_len);
- }
-
- /* \n-terminate. */
- *p = '\n';
- _cpp_push_text_context (pfile, fmacro->node, BUFF_FRONT (buff), len);
-
- /* So we free buffer allocation when macro is left. */
- pfile->context->buff = buff;
- }
-}
-
-/* Read and record the parameters, if any, of a function-like macro
- definition. Destroys pfile->out.cur.
-
- Returns true on success, false on failure (syntax error or a
- duplicate parameter). On success, CUR (pfile->context) is just
- past the closing parenthesis. */
-static bool
-scan_parameters (cpp_reader *pfile, cpp_macro *macro)
-{
- const uchar *cur = CUR (pfile->context) + 1;
- bool ok;
-
- for (;;)
- {
- cur = skip_whitespace (pfile, cur, true /* skip_comments */);
-
- if (is_idstart (*cur))
- {
- ok = false;
- if (_cpp_save_parameter (pfile, macro, lex_identifier (pfile, cur)))
- break;
- cur = skip_whitespace (pfile, CUR (pfile->context),
- true /* skip_comments */);
- if (*cur == ',')
- {
- cur++;
- continue;
- }
- ok = (*cur == ')');
- break;
- }
-
- ok = (*cur == ')' && macro->paramc == 0);
- break;
- }
-
- if (!ok)
- cpp_error (pfile, CPP_DL_ERROR, "syntax error in macro parameter list");
-
- CUR (pfile->context) = cur + (*cur == ')');
-
- return ok;
-}
-
-/* Save the text from pfile->out.base to pfile->out.cur as
- the replacement text for the current macro, followed by argument
- ARG_INDEX, with zero indicating the end of the replacement
- text. */
-static void
-save_replacement_text (cpp_reader *pfile, cpp_macro *macro,
- unsigned int arg_index)
-{
- size_t len = pfile->out.cur - pfile->out.base;
- uchar *exp;
-
- if (macro->paramc == 0)
- {
- /* Object-like and function-like macros without parameters
- simply store their \n-terminated replacement text. */
- exp = _cpp_unaligned_alloc (pfile, len + 1);
- memcpy (exp, pfile->out.base, len);
- exp[len] = '\n';
- macro->exp.text = exp;
- macro->traditional = 1;
- macro->count = len;
- }
- else
- {
- /* Store the text's length (unsigned int), the argument index
- (unsigned short, base 1) and then the text. */
- size_t blen = BLOCK_LEN (len);
- struct block *block;
-
- if (macro->count + blen > BUFF_ROOM (pfile->a_buff))
- _cpp_extend_buff (pfile, &pfile->a_buff, macro->count + blen);
-
- exp = BUFF_FRONT (pfile->a_buff);
- block = (struct block *) (exp + macro->count);
- macro->exp.text = exp;
- macro->traditional = 1;
-
- /* Write out the block information. */
- block->text_len = len;
- block->arg_index = arg_index;
- memcpy (block->text, pfile->out.base, len);
-
- /* Lex the rest into the start of the output buffer. */
- pfile->out.cur = pfile->out.base;
-
- macro->count += blen;
-
- /* If we've finished, commit the memory. */
- if (arg_index == 0)
- BUFF_FRONT (pfile->a_buff) += macro->count;
- }
-}
-
-/* Analyze and save the replacement text of a macro. Returns true on
- success. */
-bool
-_cpp_create_trad_definition (cpp_reader *pfile, cpp_macro *macro)
-{
- const uchar *cur;
- uchar *limit;
- cpp_context *context = pfile->context;
-
- /* The context has not been set up for command line defines, and CUR
- has not been updated for the macro name for in-file defines. */
- pfile->out.cur = pfile->out.base;
- CUR (context) = pfile->buffer->cur;
- RLIMIT (context) = pfile->buffer->rlimit;
- check_output_buffer (pfile, RLIMIT (context) - CUR (context));
-
- /* Is this a function-like macro? */
- if (* CUR (context) == '(')
- {
- bool ok = scan_parameters (pfile, macro);
-
- /* Remember the params so we can clear NODE_MACRO_ARG flags. */
- macro->params = (cpp_hashnode **) BUFF_FRONT (pfile->a_buff);
-
- /* Setting macro to NULL indicates an error occurred, and
- prevents unnecessary work in _cpp_scan_out_logical_line. */
- if (!ok)
- macro = NULL;
- else
- {
- BUFF_FRONT (pfile->a_buff) = (uchar *) &macro->params[macro->paramc];
- macro->fun_like = 1;
- }
- }
-
- /* Skip leading whitespace in the replacement text. */
- pfile->buffer->cur
- = skip_whitespace (pfile, CUR (context),
- CPP_OPTION (pfile, discard_comments_in_macro_exp));
-
- pfile->state.prevent_expansion++;
- _cpp_scan_out_logical_line (pfile, macro);
- pfile->state.prevent_expansion--;
-
- if (!macro)
- return false;
-
- /* Skip trailing white space. */
- cur = pfile->out.base;
- limit = pfile->out.cur;
- while (limit > cur && is_space (limit[-1]))
- limit--;
- pfile->out.cur = limit;
- save_replacement_text (pfile, macro, 0);
-
- return true;
-}
-
-/* Copy SRC of length LEN to DEST, but convert all contiguous
- whitespace to a single space, provided it is not in quotes. The
- quote currently in effect is pointed to by PQUOTE, and is updated
- by the function. Returns the number of bytes copied. */
-static size_t
-canonicalize_text (uchar *dest, const uchar *src, size_t len, uchar *pquote)
-{
- uchar *orig_dest = dest;
- uchar quote = *pquote;
-
- while (len)
- {
- if (is_space (*src) && !quote)
- {
- do
- src++, len--;
- while (len && is_space (*src));
- *dest++ = ' ';
- }
- else
- {
- if (*src == '\'' || *src == '"')
- {
- if (!quote)
- quote = *src;
- else if (quote == *src)
- quote = 0;
- }
- *dest++ = *src++, len--;
- }
- }
-
- *pquote = quote;
- return dest - orig_dest;
-}
-
-/* Returns true if MACRO1 and MACRO2 have expansions different other
- than in the form of their whitespace. */
-bool
-_cpp_expansions_different_trad (const cpp_macro *macro1,
- const cpp_macro *macro2)
-{
- uchar *p1 = XNEWVEC (uchar, macro1->count + macro2->count);
- uchar *p2 = p1 + macro1->count;
- uchar quote1 = 0, quote2 = 0;
- bool mismatch;
- size_t len1, len2;
-
- if (macro1->paramc > 0)
- {
- const uchar *exp1 = macro1->exp.text, *exp2 = macro2->exp.text;
-
- mismatch = true;
- for (;;)
- {
- struct block *b1 = (struct block *) exp1;
- struct block *b2 = (struct block *) exp2;
-
- if (b1->arg_index != b2->arg_index)
- break;
-
- len1 = canonicalize_text (p1, b1->text, b1->text_len, &quote1);
- len2 = canonicalize_text (p2, b2->text, b2->text_len, &quote2);
- if (len1 != len2 || memcmp (p1, p2, len1))
- break;
- if (b1->arg_index == 0)
- {
- mismatch = false;
- break;
- }
- exp1 += BLOCK_LEN (b1->text_len);
- exp2 += BLOCK_LEN (b2->text_len);
- }
- }
- else
- {
- len1 = canonicalize_text (p1, macro1->exp.text, macro1->count, &quote1);
- len2 = canonicalize_text (p2, macro2->exp.text, macro2->count, &quote2);
- mismatch = (len1 != len2 || memcmp (p1, p2, len1));
- }
-
- free (p1);
- return mismatch;
-}