/*************************************************************************
* vlc_parse_cmdline: Command line parsing into elements.
*
* The command line is composed of space/tab separated arguments.
* Quotes can be used as argument delimiters and a backslash can be used to
* escape a quote.
*************************************************************************/
static void find_end_quote( char **s, char **ppsz_parser, int i_quote )
{
int i_bcount = 0;
while( **s )
{
if( **s == '\\' )
{
**ppsz_parser = **s;
(*ppsz_parser)++; (*s)++;
i_bcount++;
}
else if( **s == '"' || **s == '\'' )
{
/* Preceeded by a number of '\' which we erase. */
*ppsz_parser -= i_bcount / 2;
if( i_bcount & 1 )
{
/* '\\' followed by a '"' or '\'' */
*ppsz_parser -= 1;
**ppsz_parser = **s;
(*ppsz_parser)++; (*s)++;
i_bcount = 0;
continue;
}
if( **s == i_quote )
{
/* End */
return;
}
else
{
/* Different quoting */
int i_quote = **s;
**ppsz_parser = **s;
(*ppsz_parser)++; (*s)++;
find_end_quote( s, ppsz_parser, i_quote );
**ppsz_parser = **s;
(*ppsz_parser)++; (*s)++;
}
i_bcount = 0;
}
else
{
/* A regular character */
**ppsz_parser = **s;
(*ppsz_parser)++; (*s)++;
i_bcount = 0;
}
}
}
static gdb::unique_xmalloc_ptr<char>
explicit_location_lex_one (const char **inp,
const struct language_defn *language,
explicit_completion_info *completion_info)
{
const char *start = *inp;
if (*start == '\0')
return NULL;
/* If quoted, skip to the ending quote. */
if (strchr (get_gdb_linespec_parser_quote_characters (), *start))
{
if (completion_info != NULL)
completion_info->quoted_arg_start = start;
const char *end = find_end_quote (start + 1, *start);
if (end == NULL)
{
if (completion_info == NULL)
error (_("Unmatched quote, %s."), start);
end = start + strlen (start);
*inp = end;
return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
*inp - start - 1));
}
if (completion_info != NULL)
completion_info->quoted_arg_end = end;
*inp = end + 1;
return gdb::unique_xmalloc_ptr<char> (savestring (start + 1,
*inp - start - 2));
}
/* If the input starts with '-' or '+', the string ends with the next
whitespace or comma. */
if (*start == '-' || *start == '+')
{
while (*inp[0] != '\0' && *inp[0] != ',' && !isspace (*inp[0]))
++(*inp);
}
else
{
/* Handle numbers first, stopping at the next whitespace or ','. */
while (isdigit (*inp[0]))
++(*inp);
if (*inp[0] == '\0' || isspace (*inp[0]) || *inp[0] == ',')
return gdb::unique_xmalloc_ptr<char> (savestring (start,
*inp - start));
/* Otherwise stop at the next occurrence of whitespace, '\0',
keyword, or ','. */
*inp = start;
while ((*inp)[0]
&& (*inp)[0] != ','
&& !(isspace ((*inp)[0])
|| linespec_lexer_lex_keyword (&(*inp)[1])))
{
/* Special case: C++ operator,. */
if (language->la_language == language_cplus
&& startswith (*inp, CP_OPERATOR_STR))
(*inp) += CP_OPERATOR_LEN;
++(*inp);
}
}
if (*inp - start > 0)
return gdb::unique_xmalloc_ptr<char> (savestring (start, *inp - start));
return NULL;
}
