/* 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;
}
/* Returns true if a fresh line has been loaded. */
bool
_cpp_get_fresh_line (cpp_reader *pfile)
{
int return_at_eof;
/* We can't get a new line until we leave the current directive. */
if (pfile->state.in_directive)
return false;
for (;;)
{
cpp_buffer *buffer = pfile->buffer;
if (!buffer->need_line)
return true;
if (buffer->next_line < buffer->rlimit)
{
_cpp_clean_line (pfile);
return true;
}
/* First, get out of parsing arguments state. */
if (pfile->state.parsing_args)
return false;
/* End of buffer. Non-empty files should end in a newline. */
if (buffer->buf != buffer->rlimit
&& buffer->next_line > buffer->rlimit
&& !buffer->from_stage3)
{
/* Only warn once. */
buffer->next_line = buffer->rlimit;
cpp_error_with_line (pfile, CPP_DL_PEDWARN, pfile->line - 1,
CPP_BUF_COLUMN (buffer, buffer->cur),
"no newline at end of file");
}
return_at_eof = buffer->return_at_eof;
_cpp_pop_buffer (pfile);
if (pfile->buffer == NULL || return_at_eof)
return false;
}
}
