/* Process the notes created by add_line_note as far as the current
location. */
void
_cpp_process_line_notes (cpp_reader *pfile, int in_comment)
{
cpp_buffer *buffer = pfile->buffer;
for (;;)
{
_cpp_line_note *note = &buffer->notes[buffer->cur_note];
unsigned int col;
if (note->pos > buffer->cur)
break;
buffer->cur_note++;
col = CPP_BUF_COLUMN (buffer, note->pos + 1);
if (note->type == '\\' || note->type == ' ')
{
if (note->type == ' ' && !in_comment)
cpp_error_with_line (pfile, CPP_DL_WARNING, pfile->line_table->highest_line, col,
"backslash and newline separated by space");
if (buffer->next_line > buffer->rlimit)
{
cpp_error_with_line (pfile, CPP_DL_PEDWARN, pfile->line_table->highest_line, col,
"backslash-newline at end of file");
/* Prevent "no newline at end of file" warning. */
buffer->next_line = buffer->rlimit;
}
buffer->line_base = note->pos;
CPP_INCREMENT_LINE (pfile, 0);
}
else if (_cpp_trigraph_map[note->type])
{
if (CPP_OPTION (pfile, warn_trigraphs)
&& (!in_comment || warn_in_comment (pfile, note)))
{
if (CPP_OPTION (pfile, trigraphs))
cpp_error_with_line (pfile, CPP_DL_WARNING, pfile->line_table->highest_line, col,
"trigraph ??%c converted to %c",
note->type,
(int) _cpp_trigraph_map[note->type]);
else
{
cpp_error_with_line
(pfile, CPP_DL_WARNING, pfile->line_table->highest_line, col,
"trigraph ??%c ignored, use -trigraphs to enable",
note->type);
}
}
}
else
abort ();
}
}
/* Skip a C-style block comment. We find the end of the comment by
seeing if an asterisk is before every '/' we encounter. Returns
nonzero if comment terminated by EOF, zero otherwise.
Buffer->cur points to the initial asterisk of the comment. */
bool
_cpp_skip_block_comment (cpp_reader *pfile)
{
cpp_buffer *buffer = pfile->buffer;
const uchar *cur = buffer->cur;
uchar c;
cur++;
if (*cur == '/')
cur++;
for (;;)
{
/* People like decorating comments with '*', so check for '/'
instead for efficiency. */
c = *cur++;
if (c == '/')
{
if (cur[-2] == '*')
break;
/* Warn about potential nested comments, but not if the '/'
comes immediately before the true comment delimiter.
Don't bother to get it right across escaped newlines. */
if (CPP_OPTION (pfile, warn_comments)
&& cur[0] == '*' && cur[1] != '/')
{
buffer->cur = cur;
cpp_error_with_line (pfile, CPP_DL_WARNING,
pfile->line_table->highest_line, CPP_BUF_COL (buffer),
"\"/*\" within comment");
}
}
else if (c == '\n')
{
unsigned int cols;
buffer->cur = cur - 1;
_cpp_process_line_notes (pfile, true);
if (buffer->next_line >= buffer->rlimit)
return true;
_cpp_clean_line (pfile);
cols = buffer->next_line - buffer->line_base;
CPP_INCREMENT_LINE (pfile, cols);
cur = buffer->cur;
}
}
buffer->cur = cur;
_cpp_process_line_notes (pfile, true);
return false;
}
/* Writes out the preprocessed file, handling spacing and paste
avoidance issues. */
void
_cpp_preprocess_dir_only (cpp_reader *pfile,
const struct _cpp_dir_only_callbacks *cb)
{
struct cpp_buffer *buffer;
const unsigned char *cur, *base, *next_line, *rlimit;
cppchar_t c, last_c;
unsigned flags;
linenum_type lines;
int col;
source_location loc;
restart:
/* Buffer initialization ala _cpp_clean_line(). */
buffer = pfile->buffer;
buffer->cur_note = buffer->notes_used = 0;
buffer->cur = buffer->line_base = buffer->next_line;
buffer->need_line = false;
/* This isn't really needed. It prevents a compiler warning, though. */
loc = pfile->line_table->highest_line;
/* Scan initialization. */
next_line = cur = base = buffer->cur;
rlimit = buffer->rlimit;
flags = DO_BOL;
lines = 0;
col = 1;
for (last_c = '\n', c = *cur; cur < rlimit; last_c = c, c = *++cur, ++col)
{
/* Skip over escaped newlines. */
if (__builtin_expect (c == '\\', false))
{
const unsigned char *tmp = cur + 1;
while (is_nvspace (*tmp) && tmp < rlimit)
tmp++;
if (*tmp == '\r')
tmp++;
if (*tmp == '\n' && tmp < rlimit)
{
CPP_INCREMENT_LINE (pfile, 0);
lines++;
col = 0;
cur = tmp;
c = last_c;
continue;
}
}
if (__builtin_expect (last_c == '#', false) && !(flags & DO_SPECIAL))
{
if (c != '#' && (flags & DO_BOL))
{
struct line_maps *line_table;
if (!pfile->state.skipping && next_line != base)
cb->print_lines (lines, base, next_line - base);
/* Prep things for directive handling. */
buffer->next_line = cur;
buffer->need_line = true;
_cpp_get_fresh_line (pfile);
/* Ensure proper column numbering for generated error messages. */
buffer->line_base -= col - 1;
_cpp_handle_directive (pfile, 0 /* ignore indented */);
/* Sanitize the line settings. Duplicate #include's can mess
things up. */
line_table = pfile->line_table;
line_table->highest_location = line_table->highest_line;
/* The if block prevents us from outputing line information when
the file ends with a directive and no newline. Note that we
must use pfile->buffer, not buffer. */
if (pfile->buffer->next_line < pfile->buffer->rlimit)
cb->maybe_print_line (pfile->line_table->highest_line);
goto restart;
}
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
else if (__builtin_expect (last_c == '/', false) \
&& !(flags & DO_SPECIAL) && c != '*' && c != '/')
{
/* If a previous slash is not starting a block comment, clear the
DO_BOL flag. */
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
switch (c)
{
case '/':
if ((flags & DO_BLOCK_COMMENT) && last_c == '*')
{
flags &= ~DO_BLOCK_COMMENT;
c = 0;
}
else if (!(flags & DO_SPECIAL) && last_c == '/')
flags |= DO_LINE_COMMENT;
else if (!(flags & DO_SPECIAL))
/* Mark the position for possible error reporting. */
loc = linemap_position_for_column (pfile->line_table, col);
break;
case '*':
if (!(flags & DO_SPECIAL))
{
if (last_c == '/')
flags |= DO_BLOCK_COMMENT;
else
{
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
}
break;
case '\'':
case '"':
{
unsigned state = (c == '"') ? DO_STRING : DO_CHAR;
if (!(flags & DO_SPECIAL))
{
flags |= state;
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
else if ((flags & state) && last_c != '\\')
flags &= ~state;
break;
}
case '\\':
{
if ((flags & (DO_STRING | DO_CHAR)) && last_c == '\\')
c = 0;
if (!(flags & DO_SPECIAL))
{
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
break;
}
case '\n':
CPP_INCREMENT_LINE (pfile, 0);
lines++;
col = 0;
flags &= ~DO_LINE_SPECIAL;
if (!(flags & DO_SPECIAL))
flags |= DO_BOL;
break;
case '#':
next_line = cur;
/* Don't update DO_BOL yet. */
break;
case ' ': case '\t': case '\f': case '\v': case '\0':
break;
default:
if (!(flags & DO_SPECIAL))
{
flags &= ~DO_BOL;
pfile->mi_valid = false;
}
break;
}
}
if (flags & DO_BLOCK_COMMENT)
cpp_error_with_line (pfile, CPP_DL_ERROR, loc, 0, "unterminated comment");
if (!pfile->state.skipping && cur != base)
{
/* If the file was not newline terminated, add rlimit, which is
guaranteed to point to a newline, to the end of our range. */
if (cur[-1] != '\n')
{
cur++;
CPP_INCREMENT_LINE (pfile, 0);
lines++;
}
cb->print_lines (lines, base, cur - base);
}
_cpp_pop_buffer (pfile);
if (pfile->buffer)
goto restart;
}
