/* The replacement text of a function-like macro is stored as a
contiguous sequence of aligned blocks, each representing the text
- between subsequent parameters in that text.
+ between subsequent parameters.
- Each block comprises the length of text contained therein, the
- one-based index of the argument that immediately follows that text,
- and the text itself. The final block in the macro expansion is
- easily recognizable as it has an argument index of zero. */
+ 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
{
};
#define BLOCK_HEADER_LEN offsetof (struct block, text)
-#define BLOCK_LEN(TEXT_LEN) CPP_ALIGN (BLOCK_HEADER_LEN + TEXT_LEN)
+#define BLOCK_LEN(TEXT_LEN) CPP_ALIGN (BLOCK_HEADER_LEN + (TEXT_LEN))
/* Structure holding information about a function-like macro
invocation. */
/* 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 cpplex.c
from recognizing comments and directives during its lexing pass. */
return cur + 1;
}
-/* CUR points to any character in the buffer, not necessarily a
- backslash. Advances CUR until all escaped newlines are skipped,
- and returns the new position.
+/* CUR points to any character in the current context, not necessarily
+ a backslash. Advances CUR until all escaped newlines are skipped,
+ and returns the new position without updating the context.
Warns if a file buffer ends in an escaped newline. */
static const uchar *
return cur;
}
-/* CUR points to the asterisk introducing a comment in the input
- buffer. IN_DEFINE is true if we are in the replacement text
- of a macro.
+/* 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.
if (is_nvspace (c) && c)
continue;
- if (!c && cur != RLIMIT (pfile->context))
+ if (!c && cur - 1 != RLIMIT (pfile->context))
continue;
- if (*cur == '/' && skip_comments)
+ if (c == '/' && skip_comments)
{
const uchar *tmp = skip_escaped_newlines (pfile, cur);
if (*tmp == '*')
out--;
if (c == '\\' && is_vspace (*cur))
{
- cur = skip_escaped_newlines (pfile, cur);
+ cur = skip_escaped_newlines (pfile, cur - 1);
continue;
}
{
cpp_buffer *buffer = pfile->buffer;
+ pfile->overlaid_buffer = buffer;
buffer->saved_cur = buffer->cur;
buffer->saved_rlimit = buffer->rlimit;
_cpp_remove_overlay (pfile)
cpp_reader *pfile;
{
- cpp_buffer *buffer = pfile->buffer;
+ cpp_buffer *buffer = pfile->overlaid_buffer;
buffer->cur = buffer->saved_cur;
buffer->rlimit = buffer->saved_rlimit;
_cpp_read_logical_line_trad (pfile)
cpp_reader *pfile;
{
- cpp_buffer *buffer = pfile->buffer;
-
do
{
- if (buffer->cur == buffer->rlimit)
+ if (pfile->buffer->cur == pfile->buffer->rlimit)
{
bool stop = true;
/* Don't pop the last buffer. */
- if (buffer->prev)
+ if (pfile->buffer->prev)
{
- stop = buffer->return_at_eof;
+ stop = pfile->buffer->return_at_eof;
_cpp_pop_buffer (pfile);
}
return false;
}
- CUR (pfile->context) = buffer->cur;
- RLIMIT (pfile->context) = buffer->rlimit;
scan_out_logical_line (pfile, NULL);
- buffer->cur = CUR (pfile->context);
}
while (pfile->state.skipping);
macro->node = node;
macro->offset = start - pfile->out.base;
macro->argc = 0;
-
- pfile->state.parsing_args = 1;
}
/* Save the OFFSET of the start of the next argument to MACRO. */
macro->args[macro->argc] = offset;
}
-/* Copies the next logical line in the current buffer to the output
- buffer. The output is guaranteed to terminate with a NUL
- character.
+/* 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
{
cpp_context *context;
const uchar *cur;
- unsigned int c, paren_depth = 0, quote = 0;
uchar *out;
struct fun_macro fmacro;
+ unsigned int c, paren_depth = 0, quote;
+ enum ls lex_state = ls_none;
+ bool header_ok;
fmacro.buff = NULL;
start_logical_line:
+ 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;
new_context:
c = *cur++;
*out++ = c;
- /* There are only a few entities we need to catch: comments,
- identifiers, newlines, escaped newlines, # and '\0'. */
+ /* Whitespace should "continue" out of the switch,
+ non-whitespace should "break" out of it. */
switch (c)
{
+ case ' ':
+ case '\t':
+ case '\f':
+ case '\v':
+ continue;
+
case '\0':
if (cur - 1 != RLIMIT (context))
- break;
+ continue;
/* If this is a macro's expansion, pop it. */
if (context->prev)
cur--;
if (!pfile->buffer->from_stage3)
cpp_error (pfile, DL_PEDWARN, "no newline at end of file");
- if (pfile->state.parsing_args == 2)
- cpp_error (pfile, DL_ERROR,
- "unterminated argument list invoking macro \"%s\"",
- NODE_NAME (fmacro.node));
pfile->line++;
goto done;
case '\r': case '\n':
cur = handle_newline (pfile, cur - 1);
- if (pfile->state.parsing_args == 2)
+ if ((lex_state == ls_fun_open || lex_state == ls_fun_close)
+ && !pfile->state.in_directive)
{
- /* Newlines in arguments become a space. */
- out[-1] = ' ';
+ /* Newlines in arguments become a space, but we don't
+ clear any in-progress quote. */
+ if (lex_state == ls_fun_close)
+ out[-1] = ' ';
continue;
}
goto done;
+ case '<':
+ if (header_ok)
+ quote = '>';
+ break;
+ case '>':
+ if (c == quote)
+ quote = 0;
+ break;
+
case '"':
case '\'':
if (c == quote)
case '\\':
if (is_vspace (*cur))
- out--, cur = skip_escaped_newlines (pfile, cur - 1);
+ {
+ out--;
+ cur = skip_escaped_newlines (pfile, cur - 1);
+ continue;
+ }
else
{
/* Skip escaped quotes here, it's easier than above, but
pfile->out.cur = out;
cur = copy_comment (pfile, cur, macro != 0);
out = pfile->out.cur;
+ continue;
}
}
break;
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 (quote == 0 || macro)
+ if (!pfile->state.skipping && (quote == 0 || macro))
{
cpp_hashnode *node;
+ uchar *out_start = out - 1;
- pfile->out.cur = --out;
+ pfile->out.cur = out_start;
node = lex_identifier (pfile, cur - 1);
+ out = pfile->out.cur;
+ cur = CUR (context);
if (node->type == NT_MACRO
- && !pfile->state.skipping
- && pfile->state.parsing_args != 2
- && !pfile->state.prevent_expansion
- && !recursive_macro (pfile, node))
+ /* Should we expand for ls_answer? */
+ && (lex_state == ls_none || lex_state == ls_fun_open)
+ && !pfile->state.prevent_expansion)
{
- if (node->value.macro->fun_like)
- maybe_start_funlike (pfile, node, out, &fmacro);
- else
+ /* 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;
+ 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;
+ pfile->out.cur = out_start;
push_replacement_text (pfile, node);
+ lex_state = ls_none;
goto new_context;
}
}
{
/* Found a parameter in the replacement text of a
#define. Remove its name from the output. */
- pfile->out.cur = out;
+ pfile->out.cur = out_start;
save_replacement_text (pfile, macro, node->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;
}
-
- out = pfile->out.cur;
- cur = CUR (context);
}
break;
if (quote == 0)
{
paren_depth++;
- if (pfile->state.parsing_args == 1)
+ if (lex_state == ls_fun_open)
{
- const uchar *p = pfile->out.base + fmacro.offset;
-
- /* Invoke a prior function-like macro if there is only
- white space in-between. */
- while (is_numchar (*p))
- p++;
- while (is_space (*p))
- p++;
-
- if (p == out - 1)
+ if (recursive_macro (pfile, fmacro.node))
+ lex_state = ls_none;
+ else
{
- pfile->state.parsing_args = 2;
+ lex_state = ls_fun_close;
paren_depth = 1;
out = pfile->out.base + fmacro.offset;
fmacro.args[0] = fmacro.offset;
}
- else
- pfile->state.parsing_args = 0;
}
+ 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 && pfile->state.parsing_args == 2 && paren_depth == 1)
+ if (quote == 0 && lex_state == ls_fun_close && paren_depth == 1)
save_argument (&fmacro, out - pfile->out.base);
break;
if (quote == 0)
{
paren_depth--;
- if (pfile->state.parsing_args == 2 && paren_depth == 0)
+ if (lex_state == ls_fun_close && paren_depth == 0)
{
cpp_macro *m = fmacro.node->value.macro;
- pfile->state.parsing_args = 0;
+ 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 + 1)
+ && out == pfile->out.base + fmacro.offset + 1)
fmacro.argc = 0;
if (_cpp_arguments_ok (pfile, m, fmacro.node, fmacro.argc))
goto new_context;
}
}
+ else if (lex_state == ls_answer || lex_state == ls_defined_close)
+ lex_state = ls_none;
}
break;
case '#':
- /* At start of a line it's a directive. */
if (out - 1 == pfile->out.base && !pfile->state.in_directive)
{
- /* This is a kludge. We want to have the ISO
- preprocessor lex the next token. */
- pfile->buffer->cur = cur;
- if (_cpp_handle_directive (pfile, false /* indented */))
- goto start_logical_line;
+ /* 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 (is_vspace (*cur))
+ {
+ /* Null directive. Ignore it and don't invalidate
+ the MI optimization. */
+ out = pfile->out.base;
+ continue;
+ }
+ else
+ {
+ bool do_it = false;
+
+ if (is_numstart (*cur))
+ do_it = true;
+ else if (is_idstart (*cur))
+ /* Check whether we know this directive, but don't
+ advance. */
+ do_it = lex_identifier (pfile, cur)->directive_index != 0;
+
+ 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 */);
+ /* #include changes pfile->buffer so we need to
+ update the limits of the current context. */
+ goto start_logical_line;
+ }
+ }
+ }
+
+ 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:
out[-1] = '\0';
- CUR (context) = cur;
+ pfile->buffer->cur = cur;
pfile->out.cur = out - 1;
if (fmacro.buff)
_cpp_release_buff (pfile, fmacro.buff);
+
+ if (lex_state == ls_fun_close)
+ cpp_error_with_line (pfile, DL_ERROR, fmacro.line, 0,
+ "unterminated argument list invoking macro \"%s\"",
+ NODE_NAME (fmacro.node));
}
/* Push a context holding the replacement text of the macro NODE on
cpp_reader *pfile;
cpp_hashnode *node;
{
- cpp_macro *macro = node->value.macro;
+ size_t len;
+ const uchar *text;
+
+ if (node->flags & NODE_BUILTIN)
+ {
+ text = _cpp_builtin_macro_text (pfile, node);
+ len = ustrlen (text);
+ }
+ else
+ {
+ cpp_macro *macro = node->value.macro;
+ macro->used = 1;
+ text = macro->exp.text;
+ len = macro->count;
+ }
- _cpp_push_text_context (pfile, node, macro->exp.text, macro->count);
+ _cpp_push_text_context (pfile, node, text, len);
}
/* Returns TRUE if traditional macro recursion is detected. */
cpp_reader *pfile;
cpp_hashnode *node;
{
- bool recursing = node->flags & NODE_DISABLED;
+ bool recursing = !!(node->flags & NODE_DISABLED);
/* Object-like macros that are already expanding are necessarily
recursive.
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 (macro)
+ const cpp_macro *macro;
+{
+ size_t len;
+
+ if (macro->fun_like)
+ {
+ 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 (macro, dest)
+ const cpp_macro *macro;
+ uchar *dest;
+{
+ if (macro->fun_like)
+ {
+ 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. */
{
const uchar *cur;
uchar *limit;
+ cpp_context *context = pfile->context;
- CUR (pfile->context) = pfile->buffer->cur;
+ /* 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 (pfile->context) == '(')
+ if (* CUR (context) == '(')
{
/* Setting macro to NULL indicates an error occurred, and
prevents unnecessary work in scan_out_logical_line. */
}
/* Skip leading whitespace in the replacement text. */
- CUR (pfile->context)
- = skip_whitespace (pfile, CUR (pfile->context),
+ pfile->buffer->cur
+ = skip_whitespace (pfile, CUR (context),
CPP_OPTION (pfile, discard_comments_in_macro_exp));
pfile->state.prevent_expansion++;
{
uchar *p1 = xmalloc (macro1->count + macro2->count);
uchar *p2 = p1 + macro1->count;
- uchar quote1 = 0, quote2;
+ uchar quote1 = 0, quote2 = 0;
bool mismatch;
size_t len1, len2;
free (p1);
return mismatch;
}
-
-/* Prepare to be able to scan the current buffer. */
-void
-_cpp_set_trad_context (pfile)
- cpp_reader *pfile;
-{
- cpp_buffer *buffer = pfile->buffer;
- cpp_context *context = pfile->context;
-
- if (pfile->context->prev)
- abort ();
-
- pfile->out.cur = pfile->out.base;
- CUR (context) = buffer->cur;
- RLIMIT (context) = buffer->rlimit;
- check_output_buffer (pfile, RLIMIT (context) - CUR (context));
-}
OSDN Git Service
